kon/vendor/github.com/valyala/fasthttp/header.go
2024-07-02 16:36:04 +02:00

3442 lines
96 KiB
Go

package fasthttp
import (
"bufio"
"bytes"
"errors"
"fmt"
"io"
"sync"
"sync/atomic"
"time"
)
const (
rChar = byte('\r')
nChar = byte('\n')
)
// ResponseHeader represents HTTP response header.
//
// It is forbidden copying ResponseHeader instances.
// Create new instances instead and use CopyTo.
//
// ResponseHeader instance MUST NOT be used from concurrently running
// goroutines.
type ResponseHeader struct {
noCopy noCopy
disableNormalizing bool
noHTTP11 bool
connectionClose bool
noDefaultContentType bool
noDefaultDate bool
statusCode int
statusMessage []byte
protocol []byte
contentLength int
contentLengthBytes []byte
secureErrorLogMessage bool
contentType []byte
contentEncoding []byte
server []byte
mulHeader [][]byte
h []argsKV
trailer []argsKV
bufKV argsKV
cookies []argsKV
}
// RequestHeader represents HTTP request header.
//
// It is forbidden copying RequestHeader instances.
// Create new instances instead and use CopyTo.
//
// RequestHeader instance MUST NOT be used from concurrently running
// goroutines.
type RequestHeader struct {
noCopy noCopy
disableNormalizing bool
noHTTP11 bool
connectionClose bool
noDefaultContentType bool
disableSpecialHeader bool
// These two fields have been moved close to other bool fields
// for reducing RequestHeader object size.
cookiesCollected bool
contentLength int
contentLengthBytes []byte
secureErrorLogMessage bool
method []byte
requestURI []byte
proto []byte
host []byte
contentType []byte
userAgent []byte
mulHeader [][]byte
h []argsKV
trailer []argsKV
bufKV argsKV
cookies []argsKV
// stores an immutable copy of headers as they were received from the
// wire.
rawHeaders []byte
}
// SetContentRange sets 'Content-Range: bytes startPos-endPos/contentLength'
// header.
func (h *ResponseHeader) SetContentRange(startPos, endPos, contentLength int) {
b := h.bufKV.value[:0]
b = append(b, strBytes...)
b = append(b, ' ')
b = AppendUint(b, startPos)
b = append(b, '-')
b = AppendUint(b, endPos)
b = append(b, '/')
b = AppendUint(b, contentLength)
h.bufKV.value = b
h.setNonSpecial(strContentRange, h.bufKV.value)
}
// SetByteRange sets 'Range: bytes=startPos-endPos' header.
//
// - If startPos is negative, then 'bytes=-startPos' value is set.
// - If endPos is negative, then 'bytes=startPos-' value is set.
func (h *RequestHeader) SetByteRange(startPos, endPos int) {
b := h.bufKV.value[:0]
b = append(b, strBytes...)
b = append(b, '=')
if startPos >= 0 {
b = AppendUint(b, startPos)
} else {
endPos = -startPos
}
b = append(b, '-')
if endPos >= 0 {
b = AppendUint(b, endPos)
}
h.bufKV.value = b
h.setNonSpecial(strRange, h.bufKV.value)
}
// StatusCode returns response status code.
func (h *ResponseHeader) StatusCode() int {
if h.statusCode == 0 {
return StatusOK
}
return h.statusCode
}
// SetStatusCode sets response status code.
func (h *ResponseHeader) SetStatusCode(statusCode int) {
h.statusCode = statusCode
}
// StatusMessage returns response status message.
func (h *ResponseHeader) StatusMessage() []byte {
return h.statusMessage
}
// SetStatusMessage sets response status message bytes.
func (h *ResponseHeader) SetStatusMessage(statusMessage []byte) {
h.statusMessage = append(h.statusMessage[:0], statusMessage...)
}
// Protocol returns response protocol bytes.
func (h *ResponseHeader) Protocol() []byte {
if len(h.protocol) > 0 {
return h.protocol
}
return strHTTP11
}
// SetProtocol sets response protocol bytes.
func (h *ResponseHeader) SetProtocol(protocol []byte) {
h.protocol = append(h.protocol[:0], protocol...)
}
// SetLastModified sets 'Last-Modified' header to the given value.
func (h *ResponseHeader) SetLastModified(t time.Time) {
h.bufKV.value = AppendHTTPDate(h.bufKV.value[:0], t)
h.setNonSpecial(strLastModified, h.bufKV.value)
}
// ConnectionClose returns true if 'Connection: close' header is set.
func (h *ResponseHeader) ConnectionClose() bool {
return h.connectionClose
}
// SetConnectionClose sets 'Connection: close' header.
func (h *ResponseHeader) SetConnectionClose() {
h.connectionClose = true
}
// ResetConnectionClose clears 'Connection: close' header if it exists.
func (h *ResponseHeader) ResetConnectionClose() {
if h.connectionClose {
h.connectionClose = false
h.h = delAllArgsBytes(h.h, strConnection)
}
}
// ConnectionClose returns true if 'Connection: close' header is set.
func (h *RequestHeader) ConnectionClose() bool {
return h.connectionClose
}
// SetConnectionClose sets 'Connection: close' header.
func (h *RequestHeader) SetConnectionClose() {
h.connectionClose = true
}
// ResetConnectionClose clears 'Connection: close' header if it exists.
func (h *RequestHeader) ResetConnectionClose() {
if h.connectionClose {
h.connectionClose = false
h.h = delAllArgsBytes(h.h, strConnection)
}
}
// ConnectionUpgrade returns true if 'Connection: Upgrade' header is set.
func (h *ResponseHeader) ConnectionUpgrade() bool {
return hasHeaderValue(h.Peek(HeaderConnection), strUpgrade)
}
// ConnectionUpgrade returns true if 'Connection: Upgrade' header is set.
func (h *RequestHeader) ConnectionUpgrade() bool {
return hasHeaderValue(h.Peek(HeaderConnection), strUpgrade)
}
// PeekCookie is able to returns cookie by a given key from response.
func (h *ResponseHeader) PeekCookie(key string) []byte {
return peekArgStr(h.cookies, key)
}
// ContentLength returns Content-Length header value.
//
// It may be negative:
// -1 means Transfer-Encoding: chunked.
// -2 means Transfer-Encoding: identity.
func (h *ResponseHeader) ContentLength() int {
return h.contentLength
}
// SetContentLength sets Content-Length header value.
//
// Content-Length may be negative:
// -1 means Transfer-Encoding: chunked.
// -2 means Transfer-Encoding: identity.
func (h *ResponseHeader) SetContentLength(contentLength int) {
if h.mustSkipContentLength() {
return
}
h.contentLength = contentLength
if contentLength >= 0 {
h.contentLengthBytes = AppendUint(h.contentLengthBytes[:0], contentLength)
h.h = delAllArgsBytes(h.h, strTransferEncoding)
} else {
h.contentLengthBytes = h.contentLengthBytes[:0]
value := strChunked
if contentLength == -2 {
h.SetConnectionClose()
value = strIdentity
}
h.h = setArgBytes(h.h, strTransferEncoding, value, argsHasValue)
}
}
func (h *ResponseHeader) mustSkipContentLength() bool {
// From http/1.1 specs:
// All 1xx (informational), 204 (no content), and 304 (not modified) responses MUST NOT include a message-body
statusCode := h.StatusCode()
// Fast path.
if statusCode < 100 || statusCode == StatusOK {
return false
}
// Slow path.
return statusCode == StatusNotModified || statusCode == StatusNoContent || statusCode < 200
}
// ContentLength returns Content-Length header value.
//
// It may be negative:
// -1 means Transfer-Encoding: chunked.
func (h *RequestHeader) ContentLength() int {
return h.realContentLength()
}
// realContentLength returns the actual Content-Length set in the request,
// including positive lengths for GET/HEAD requests.
func (h *RequestHeader) realContentLength() int {
return h.contentLength
}
// SetContentLength sets Content-Length header value.
//
// Negative content-length sets 'Transfer-Encoding: chunked' header.
func (h *RequestHeader) SetContentLength(contentLength int) {
h.contentLength = contentLength
if contentLength >= 0 {
h.contentLengthBytes = AppendUint(h.contentLengthBytes[:0], contentLength)
h.h = delAllArgsBytes(h.h, strTransferEncoding)
} else {
h.contentLengthBytes = h.contentLengthBytes[:0]
h.h = setArgBytes(h.h, strTransferEncoding, strChunked, argsHasValue)
}
}
func (h *ResponseHeader) isCompressibleContentType() bool {
contentType := h.ContentType()
return bytes.HasPrefix(contentType, strTextSlash) ||
bytes.HasPrefix(contentType, strApplicationSlash) ||
bytes.HasPrefix(contentType, strImageSVG) ||
bytes.HasPrefix(contentType, strImageIcon) ||
bytes.HasPrefix(contentType, strFontSlash) ||
bytes.HasPrefix(contentType, strMultipartSlash)
}
// ContentType returns Content-Type header value.
func (h *ResponseHeader) ContentType() []byte {
contentType := h.contentType
if !h.noDefaultContentType && len(h.contentType) == 0 {
contentType = defaultContentType
}
return contentType
}
// SetContentType sets Content-Type header value.
func (h *ResponseHeader) SetContentType(contentType string) {
h.contentType = append(h.contentType[:0], contentType...)
}
// SetContentTypeBytes sets Content-Type header value.
func (h *ResponseHeader) SetContentTypeBytes(contentType []byte) {
h.contentType = append(h.contentType[:0], contentType...)
}
// ContentEncoding returns Content-Encoding header value.
func (h *ResponseHeader) ContentEncoding() []byte {
return h.contentEncoding
}
// SetContentEncoding sets Content-Encoding header value.
func (h *ResponseHeader) SetContentEncoding(contentEncoding string) {
h.contentEncoding = append(h.contentEncoding[:0], contentEncoding...)
}
// SetContentEncodingBytes sets Content-Encoding header value.
func (h *ResponseHeader) SetContentEncodingBytes(contentEncoding []byte) {
h.contentEncoding = append(h.contentEncoding[:0], contentEncoding...)
}
// addVaryBytes add value to the 'Vary' header if it's not included
func (h *ResponseHeader) addVaryBytes(value []byte) {
v := h.peek(strVary)
if len(v) == 0 {
// 'Vary' is not set
h.SetBytesV(HeaderVary, value)
} else if !bytes.Contains(v, value) {
// 'Vary' is set and not contains target value
h.SetBytesV(HeaderVary, append(append(v, ','), value...))
} // else: 'Vary' is set and contains target value
}
// Server returns Server header value.
func (h *ResponseHeader) Server() []byte {
return h.server
}
// SetServer sets Server header value.
func (h *ResponseHeader) SetServer(server string) {
h.server = append(h.server[:0], server...)
}
// SetServerBytes sets Server header value.
func (h *ResponseHeader) SetServerBytes(server []byte) {
h.server = append(h.server[:0], server...)
}
// ContentType returns Content-Type header value.
func (h *RequestHeader) ContentType() []byte {
if h.disableSpecialHeader {
return peekArgBytes(h.h, []byte(HeaderContentType))
}
return h.contentType
}
// SetContentType sets Content-Type header value.
func (h *RequestHeader) SetContentType(contentType string) {
h.contentType = append(h.contentType[:0], contentType...)
}
// SetContentTypeBytes sets Content-Type header value.
func (h *RequestHeader) SetContentTypeBytes(contentType []byte) {
h.contentType = append(h.contentType[:0], contentType...)
}
// ContentEncoding returns Content-Encoding header value.
func (h *RequestHeader) ContentEncoding() []byte {
return peekArgBytes(h.h, strContentEncoding)
}
// SetContentEncoding sets Content-Encoding header value.
func (h *RequestHeader) SetContentEncoding(contentEncoding string) {
h.SetBytesK(strContentEncoding, contentEncoding)
}
// SetContentEncodingBytes sets Content-Encoding header value.
func (h *RequestHeader) SetContentEncodingBytes(contentEncoding []byte) {
h.setNonSpecial(strContentEncoding, contentEncoding)
}
// SetMultipartFormBoundary sets the following Content-Type:
// 'multipart/form-data; boundary=...'
// where ... is substituted by the given boundary.
func (h *RequestHeader) SetMultipartFormBoundary(boundary string) {
b := h.bufKV.value[:0]
b = append(b, strMultipartFormData...)
b = append(b, ';', ' ')
b = append(b, strBoundary...)
b = append(b, '=')
b = append(b, boundary...)
h.bufKV.value = b
h.SetContentTypeBytes(h.bufKV.value)
}
// SetMultipartFormBoundaryBytes sets the following Content-Type:
// 'multipart/form-data; boundary=...'
// where ... is substituted by the given boundary.
func (h *RequestHeader) SetMultipartFormBoundaryBytes(boundary []byte) {
b := h.bufKV.value[:0]
b = append(b, strMultipartFormData...)
b = append(b, ';', ' ')
b = append(b, strBoundary...)
b = append(b, '=')
b = append(b, boundary...)
h.bufKV.value = b
h.SetContentTypeBytes(h.bufKV.value)
}
// SetTrailer sets header Trailer value for chunked response
// to indicate which headers will be sent after the body.
//
// Use Set to set the trailer header later.
//
// Trailers are only supported with chunked transfer.
// Trailers allow the sender to include additional headers at the end of chunked messages.
//
// The following trailers are forbidden:
// 1. necessary for message framing (e.g., Transfer-Encoding and Content-Length),
// 2. routing (e.g., Host),
// 3. request modifiers (e.g., controls and conditionals in Section 5 of [RFC7231]),
// 4. authentication (e.g., see [RFC7235] and [RFC6265]),
// 5. response control data (e.g., see Section 7.1 of [RFC7231]),
// 6. determining how to process the payload (e.g., Content-Encoding, Content-Type, Content-Range, and Trailer)
//
// Return ErrBadTrailer if contain any forbidden trailers.
func (h *ResponseHeader) SetTrailer(trailer string) error {
return h.SetTrailerBytes(s2b(trailer))
}
// SetTrailerBytes sets Trailer header value for chunked response
// to indicate which headers will be sent after the body.
//
// Use Set to set the trailer header later.
//
// Trailers are only supported with chunked transfer.
// Trailers allow the sender to include additional headers at the end of chunked messages.
//
// The following trailers are forbidden:
// 1. necessary for message framing (e.g., Transfer-Encoding and Content-Length),
// 2. routing (e.g., Host),
// 3. request modifiers (e.g., controls and conditionals in Section 5 of [RFC7231]),
// 4. authentication (e.g., see [RFC7235] and [RFC6265]),
// 5. response control data (e.g., see Section 7.1 of [RFC7231]),
// 6. determining how to process the payload (e.g., Content-Encoding, Content-Type, Content-Range, and Trailer)
//
// Return ErrBadTrailer if contain any forbidden trailers.
func (h *ResponseHeader) SetTrailerBytes(trailer []byte) error {
h.trailer = h.trailer[:0]
return h.AddTrailerBytes(trailer)
}
// AddTrailer add Trailer header value for chunked response
// to indicate which headers will be sent after the body.
//
// Use Set to set the trailer header later.
//
// Trailers are only supported with chunked transfer.
// Trailers allow the sender to include additional headers at the end of chunked messages.
//
// The following trailers are forbidden:
// 1. necessary for message framing (e.g., Transfer-Encoding and Content-Length),
// 2. routing (e.g., Host),
// 3. request modifiers (e.g., controls and conditionals in Section 5 of [RFC7231]),
// 4. authentication (e.g., see [RFC7235] and [RFC6265]),
// 5. response control data (e.g., see Section 7.1 of [RFC7231]),
// 6. determining how to process the payload (e.g., Content-Encoding, Content-Type, Content-Range, and Trailer)
//
// Return ErrBadTrailer if contain any forbidden trailers.
func (h *ResponseHeader) AddTrailer(trailer string) error {
return h.AddTrailerBytes(s2b(trailer))
}
var ErrBadTrailer = errors.New("contain forbidden trailer")
// AddTrailerBytes add Trailer header value for chunked response
// to indicate which headers will be sent after the body.
//
// Use Set to set the trailer header later.
//
// Trailers are only supported with chunked transfer.
// Trailers allow the sender to include additional headers at the end of chunked messages.
//
// The following trailers are forbidden:
// 1. necessary for message framing (e.g., Transfer-Encoding and Content-Length),
// 2. routing (e.g., Host),
// 3. request modifiers (e.g., controls and conditionals in Section 5 of [RFC7231]),
// 4. authentication (e.g., see [RFC7235] and [RFC6265]),
// 5. response control data (e.g., see Section 7.1 of [RFC7231]),
// 6. determining how to process the payload (e.g., Content-Encoding, Content-Type, Content-Range, and Trailer)
//
// Return ErrBadTrailer if contain any forbidden trailers.
func (h *ResponseHeader) AddTrailerBytes(trailer []byte) error {
var err error
for i := -1; i+1 < len(trailer); {
trailer = trailer[i+1:]
i = bytes.IndexByte(trailer, ',')
if i < 0 {
i = len(trailer)
}
key := trailer[:i]
for len(key) > 0 && key[0] == ' ' {
key = key[1:]
}
for len(key) > 0 && key[len(key)-1] == ' ' {
key = key[:len(key)-1]
}
// Forbidden by RFC 7230, section 4.1.2
if isBadTrailer(key) {
err = ErrBadTrailer
continue
}
h.bufKV.key = append(h.bufKV.key[:0], key...)
normalizeHeaderKey(h.bufKV.key, h.disableNormalizing)
h.trailer = appendArgBytes(h.trailer, h.bufKV.key, nil, argsNoValue)
}
return err
}
// MultipartFormBoundary returns boundary part
// from 'multipart/form-data; boundary=...' Content-Type.
func (h *RequestHeader) MultipartFormBoundary() []byte {
b := h.ContentType()
if !bytes.HasPrefix(b, strMultipartFormData) {
return nil
}
b = b[len(strMultipartFormData):]
if len(b) == 0 || b[0] != ';' {
return nil
}
var n int
for len(b) > 0 {
n++
for len(b) > n && b[n] == ' ' {
n++
}
b = b[n:]
if !bytes.HasPrefix(b, strBoundary) {
if n = bytes.IndexByte(b, ';'); n < 0 {
return nil
}
continue
}
b = b[len(strBoundary):]
if len(b) == 0 || b[0] != '=' {
return nil
}
b = b[1:]
if n = bytes.IndexByte(b, ';'); n >= 0 {
b = b[:n]
}
if len(b) > 1 && b[0] == '"' && b[len(b)-1] == '"' {
b = b[1 : len(b)-1]
}
return b
}
return nil
}
// Host returns Host header value.
func (h *RequestHeader) Host() []byte {
if h.disableSpecialHeader {
return peekArgBytes(h.h, []byte(HeaderHost))
}
return h.host
}
// SetHost sets Host header value.
func (h *RequestHeader) SetHost(host string) {
h.host = append(h.host[:0], host...)
}
// SetHostBytes sets Host header value.
func (h *RequestHeader) SetHostBytes(host []byte) {
h.host = append(h.host[:0], host...)
}
// UserAgent returns User-Agent header value.
func (h *RequestHeader) UserAgent() []byte {
if h.disableSpecialHeader {
return peekArgBytes(h.h, []byte(HeaderUserAgent))
}
return h.userAgent
}
// SetUserAgent sets User-Agent header value.
func (h *RequestHeader) SetUserAgent(userAgent string) {
h.userAgent = append(h.userAgent[:0], userAgent...)
}
// SetUserAgentBytes sets User-Agent header value.
func (h *RequestHeader) SetUserAgentBytes(userAgent []byte) {
h.userAgent = append(h.userAgent[:0], userAgent...)
}
// Referer returns Referer header value.
func (h *RequestHeader) Referer() []byte {
return peekArgBytes(h.h, strReferer)
}
// SetReferer sets Referer header value.
func (h *RequestHeader) SetReferer(referer string) {
h.SetBytesK(strReferer, referer)
}
// SetRefererBytes sets Referer header value.
func (h *RequestHeader) SetRefererBytes(referer []byte) {
h.setNonSpecial(strReferer, referer)
}
// Method returns HTTP request method.
func (h *RequestHeader) Method() []byte {
if len(h.method) == 0 {
return []byte(MethodGet)
}
return h.method
}
// SetMethod sets HTTP request method.
func (h *RequestHeader) SetMethod(method string) {
h.method = append(h.method[:0], method...)
}
// SetMethodBytes sets HTTP request method.
func (h *RequestHeader) SetMethodBytes(method []byte) {
h.method = append(h.method[:0], method...)
}
// Protocol returns HTTP protocol.
func (h *RequestHeader) Protocol() []byte {
if len(h.proto) == 0 {
return strHTTP11
}
return h.proto
}
// SetProtocol sets HTTP request protocol.
func (h *RequestHeader) SetProtocol(method string) {
h.proto = append(h.proto[:0], method...)
h.noHTTP11 = !bytes.Equal(h.proto, strHTTP11)
}
// SetProtocolBytes sets HTTP request protocol.
func (h *RequestHeader) SetProtocolBytes(method []byte) {
h.proto = append(h.proto[:0], method...)
h.noHTTP11 = !bytes.Equal(h.proto, strHTTP11)
}
// RequestURI returns RequestURI from the first HTTP request line.
func (h *RequestHeader) RequestURI() []byte {
requestURI := h.requestURI
if len(requestURI) == 0 {
requestURI = strSlash
}
return requestURI
}
// SetRequestURI sets RequestURI for the first HTTP request line.
// RequestURI must be properly encoded.
// Use URI.RequestURI for constructing proper RequestURI if unsure.
func (h *RequestHeader) SetRequestURI(requestURI string) {
h.requestURI = append(h.requestURI[:0], requestURI...)
}
// SetRequestURIBytes sets RequestURI for the first HTTP request line.
// RequestURI must be properly encoded.
// Use URI.RequestURI for constructing proper RequestURI if unsure.
func (h *RequestHeader) SetRequestURIBytes(requestURI []byte) {
h.requestURI = append(h.requestURI[:0], requestURI...)
}
// SetTrailer sets Trailer header value for chunked request
// to indicate which headers will be sent after the body.
//
// Use Set to set the trailer header later.
//
// Trailers are only supported with chunked transfer.
// Trailers allow the sender to include additional headers at the end of chunked messages.
//
// The following trailers are forbidden:
// 1. necessary for message framing (e.g., Transfer-Encoding and Content-Length),
// 2. routing (e.g., Host),
// 3. request modifiers (e.g., controls and conditionals in Section 5 of [RFC7231]),
// 4. authentication (e.g., see [RFC7235] and [RFC6265]),
// 5. response control data (e.g., see Section 7.1 of [RFC7231]),
// 6. determining how to process the payload (e.g., Content-Encoding, Content-Type, Content-Range, and Trailer)
//
// Return ErrBadTrailer if contain any forbidden trailers.
func (h *RequestHeader) SetTrailer(trailer string) error {
return h.SetTrailerBytes(s2b(trailer))
}
// SetTrailerBytes sets Trailer header value for chunked request
// to indicate which headers will be sent after the body.
//
// Use Set to set the trailer header later.
//
// Trailers are only supported with chunked transfer.
// Trailers allow the sender to include additional headers at the end of chunked messages.
//
// The following trailers are forbidden:
// 1. necessary for message framing (e.g., Transfer-Encoding and Content-Length),
// 2. routing (e.g., Host),
// 3. request modifiers (e.g., controls and conditionals in Section 5 of [RFC7231]),
// 4. authentication (e.g., see [RFC7235] and [RFC6265]),
// 5. response control data (e.g., see Section 7.1 of [RFC7231]),
// 6. determining how to process the payload (e.g., Content-Encoding, Content-Type, Content-Range, and Trailer)
//
// Return ErrBadTrailer if contain any forbidden trailers.
func (h *RequestHeader) SetTrailerBytes(trailer []byte) error {
h.trailer = h.trailer[:0]
return h.AddTrailerBytes(trailer)
}
// AddTrailer add Trailer header value for chunked request
// to indicate which headers will be sent after the body.
//
// Use Set to set the trailer header later.
//
// Trailers are only supported with chunked transfer.
// Trailers allow the sender to include additional headers at the end of chunked messages.
//
// The following trailers are forbidden:
// 1. necessary for message framing (e.g., Transfer-Encoding and Content-Length),
// 2. routing (e.g., Host),
// 3. request modifiers (e.g., controls and conditionals in Section 5 of [RFC7231]),
// 4. authentication (e.g., see [RFC7235] and [RFC6265]),
// 5. response control data (e.g., see Section 7.1 of [RFC7231]),
// 6. determining how to process the payload (e.g., Content-Encoding, Content-Type, Content-Range, and Trailer)
//
// Return ErrBadTrailer if contain any forbidden trailers.
func (h *RequestHeader) AddTrailer(trailer string) error {
return h.AddTrailerBytes(s2b(trailer))
}
// AddTrailerBytes add Trailer header value for chunked request
// to indicate which headers will be sent after the body.
//
// Use Set to set the trailer header later.
//
// Trailers are only supported with chunked transfer.
// Trailers allow the sender to include additional headers at the end of chunked messages.
//
// The following trailers are forbidden:
// 1. necessary for message framing (e.g., Transfer-Encoding and Content-Length),
// 2. routing (e.g., Host),
// 3. request modifiers (e.g., controls and conditionals in Section 5 of [RFC7231]),
// 4. authentication (e.g., see [RFC7235] and [RFC6265]),
// 5. response control data (e.g., see Section 7.1 of [RFC7231]),
// 6. determining how to process the payload (e.g., Content-Encoding, Content-Type, Content-Range, and Trailer)
//
// Return ErrBadTrailer if contain any forbidden trailers.
func (h *RequestHeader) AddTrailerBytes(trailer []byte) error {
var err error
for i := -1; i+1 < len(trailer); {
trailer = trailer[i+1:]
i = bytes.IndexByte(trailer, ',')
if i < 0 {
i = len(trailer)
}
key := trailer[:i]
for len(key) > 0 && key[0] == ' ' {
key = key[1:]
}
for len(key) > 0 && key[len(key)-1] == ' ' {
key = key[:len(key)-1]
}
// Forbidden by RFC 7230, section 4.1.2
if isBadTrailer(key) {
err = ErrBadTrailer
continue
}
h.bufKV.key = append(h.bufKV.key[:0], key...)
normalizeHeaderKey(h.bufKV.key, h.disableNormalizing)
h.trailer = appendArgBytes(h.trailer, h.bufKV.key, nil, argsNoValue)
}
return err
}
// IsGet returns true if request method is GET.
func (h *RequestHeader) IsGet() bool {
return string(h.Method()) == MethodGet
}
// IsPost returns true if request method is POST.
func (h *RequestHeader) IsPost() bool {
return string(h.Method()) == MethodPost
}
// IsPut returns true if request method is PUT.
func (h *RequestHeader) IsPut() bool {
return string(h.Method()) == MethodPut
}
// IsHead returns true if request method is HEAD.
func (h *RequestHeader) IsHead() bool {
return string(h.Method()) == MethodHead
}
// IsDelete returns true if request method is DELETE.
func (h *RequestHeader) IsDelete() bool {
return string(h.Method()) == MethodDelete
}
// IsConnect returns true if request method is CONNECT.
func (h *RequestHeader) IsConnect() bool {
return string(h.Method()) == MethodConnect
}
// IsOptions returns true if request method is OPTIONS.
func (h *RequestHeader) IsOptions() bool {
return string(h.Method()) == MethodOptions
}
// IsTrace returns true if request method is TRACE.
func (h *RequestHeader) IsTrace() bool {
return string(h.Method()) == MethodTrace
}
// IsPatch returns true if request method is PATCH.
func (h *RequestHeader) IsPatch() bool {
return string(h.Method()) == MethodPatch
}
// IsHTTP11 returns true if the request is HTTP/1.1.
func (h *RequestHeader) IsHTTP11() bool {
return !h.noHTTP11
}
// IsHTTP11 returns true if the response is HTTP/1.1.
func (h *ResponseHeader) IsHTTP11() bool {
return !h.noHTTP11
}
// HasAcceptEncoding returns true if the header contains
// the given Accept-Encoding value.
func (h *RequestHeader) HasAcceptEncoding(acceptEncoding string) bool {
h.bufKV.value = append(h.bufKV.value[:0], acceptEncoding...)
return h.HasAcceptEncodingBytes(h.bufKV.value)
}
// HasAcceptEncodingBytes returns true if the header contains
// the given Accept-Encoding value.
func (h *RequestHeader) HasAcceptEncodingBytes(acceptEncoding []byte) bool {
ae := h.peek(strAcceptEncoding)
n := bytes.Index(ae, acceptEncoding)
if n < 0 {
return false
}
b := ae[n+len(acceptEncoding):]
if len(b) > 0 && b[0] != ',' {
return false
}
if n == 0 {
return true
}
return ae[n-1] == ' '
}
// Len returns the number of headers set,
// i.e. the number of times f is called in VisitAll.
func (h *ResponseHeader) Len() int {
n := 0
h.VisitAll(func(_, _ []byte) { n++ })
return n
}
// Len returns the number of headers set,
// i.e. the number of times f is called in VisitAll.
func (h *RequestHeader) Len() int {
n := 0
h.VisitAll(func(_, _ []byte) { n++ })
return n
}
// DisableSpecialHeader disables special header processing.
// fasthttp will not set any special headers for you, such as Host, Content-Type, User-Agent, etc.
// You must set everything yourself.
// If RequestHeader.Read() is called, special headers will be ignored.
// This can be used to control case and order of special headers.
// This is generally not recommended.
func (h *RequestHeader) DisableSpecialHeader() {
h.disableSpecialHeader = true
}
// EnableSpecialHeader enables special header processing.
// fasthttp will send Host, Content-Type, User-Agent, etc headers for you.
// This is suggested and enabled by default.
func (h *RequestHeader) EnableSpecialHeader() {
h.disableSpecialHeader = false
}
// DisableNormalizing disables header names' normalization.
//
// By default all the header names are normalized by uppercasing
// the first letter and all the first letters following dashes,
// while lowercasing all the other letters.
// Examples:
//
// - CONNECTION -> Connection
// - conteNT-tYPE -> Content-Type
// - foo-bar-baz -> Foo-Bar-Baz
//
// Disable header names' normalization only if know what are you doing.
func (h *RequestHeader) DisableNormalizing() {
h.disableNormalizing = true
}
// EnableNormalizing enables header names' normalization.
//
// Header names are normalized by uppercasing the first letter and
// all the first letters following dashes, while lowercasing all
// the other letters.
// Examples:
//
// - CONNECTION -> Connection
// - conteNT-tYPE -> Content-Type
// - foo-bar-baz -> Foo-Bar-Baz
//
// This is enabled by default unless disabled using DisableNormalizing()
func (h *RequestHeader) EnableNormalizing() {
h.disableNormalizing = false
}
// DisableNormalizing disables header names' normalization.
//
// By default all the header names are normalized by uppercasing
// the first letter and all the first letters following dashes,
// while lowercasing all the other letters.
// Examples:
//
// - CONNECTION -> Connection
// - conteNT-tYPE -> Content-Type
// - foo-bar-baz -> Foo-Bar-Baz
//
// Disable header names' normalization only if know what are you doing.
func (h *ResponseHeader) DisableNormalizing() {
h.disableNormalizing = true
}
// EnableNormalizing enables header names' normalization.
//
// Header names are normalized by uppercasing the first letter and
// all the first letters following dashes, while lowercasing all
// the other letters.
// Examples:
//
// - CONNECTION -> Connection
// - conteNT-tYPE -> Content-Type
// - foo-bar-baz -> Foo-Bar-Baz
//
// This is enabled by default unless disabled using DisableNormalizing()
func (h *ResponseHeader) EnableNormalizing() {
h.disableNormalizing = false
}
// SetNoDefaultContentType allows you to control if a default Content-Type header will be set (false) or not (true).
func (h *ResponseHeader) SetNoDefaultContentType(noDefaultContentType bool) {
h.noDefaultContentType = noDefaultContentType
}
// Reset clears response header.
func (h *ResponseHeader) Reset() {
h.disableNormalizing = false
h.SetNoDefaultContentType(false)
h.noDefaultDate = false
h.resetSkipNormalize()
}
func (h *ResponseHeader) resetSkipNormalize() {
h.noHTTP11 = false
h.connectionClose = false
h.statusCode = 0
h.statusMessage = h.statusMessage[:0]
h.protocol = h.protocol[:0]
h.contentLength = 0
h.contentLengthBytes = h.contentLengthBytes[:0]
h.contentType = h.contentType[:0]
h.contentEncoding = h.contentEncoding[:0]
h.server = h.server[:0]
h.h = h.h[:0]
h.cookies = h.cookies[:0]
h.trailer = h.trailer[:0]
h.mulHeader = h.mulHeader[:0]
}
// SetNoDefaultContentType allows you to control if a default Content-Type header will be set (false) or not (true).
func (h *RequestHeader) SetNoDefaultContentType(noDefaultContentType bool) {
h.noDefaultContentType = noDefaultContentType
}
// Reset clears request header.
func (h *RequestHeader) Reset() {
h.disableSpecialHeader = false
h.disableNormalizing = false
h.SetNoDefaultContentType(false)
h.resetSkipNormalize()
}
func (h *RequestHeader) resetSkipNormalize() {
h.noHTTP11 = false
h.connectionClose = false
h.contentLength = 0
h.contentLengthBytes = h.contentLengthBytes[:0]
h.method = h.method[:0]
h.proto = h.proto[:0]
h.requestURI = h.requestURI[:0]
h.host = h.host[:0]
h.contentType = h.contentType[:0]
h.userAgent = h.userAgent[:0]
h.trailer = h.trailer[:0]
h.mulHeader = h.mulHeader[:0]
h.h = h.h[:0]
h.cookies = h.cookies[:0]
h.cookiesCollected = false
h.rawHeaders = h.rawHeaders[:0]
}
// CopyTo copies all the headers to dst.
func (h *ResponseHeader) CopyTo(dst *ResponseHeader) {
dst.Reset()
dst.disableNormalizing = h.disableNormalizing
dst.noHTTP11 = h.noHTTP11
dst.connectionClose = h.connectionClose
dst.noDefaultContentType = h.noDefaultContentType
dst.noDefaultDate = h.noDefaultDate
dst.statusCode = h.statusCode
dst.statusMessage = append(dst.statusMessage, h.statusMessage...)
dst.protocol = append(dst.protocol, h.protocol...)
dst.contentLength = h.contentLength
dst.contentLengthBytes = append(dst.contentLengthBytes, h.contentLengthBytes...)
dst.contentType = append(dst.contentType, h.contentType...)
dst.contentEncoding = append(dst.contentEncoding, h.contentEncoding...)
dst.server = append(dst.server, h.server...)
dst.h = copyArgs(dst.h, h.h)
dst.cookies = copyArgs(dst.cookies, h.cookies)
dst.trailer = copyArgs(dst.trailer, h.trailer)
}
// CopyTo copies all the headers to dst.
func (h *RequestHeader) CopyTo(dst *RequestHeader) {
dst.Reset()
dst.disableNormalizing = h.disableNormalizing
dst.noHTTP11 = h.noHTTP11
dst.connectionClose = h.connectionClose
dst.noDefaultContentType = h.noDefaultContentType
dst.contentLength = h.contentLength
dst.contentLengthBytes = append(dst.contentLengthBytes, h.contentLengthBytes...)
dst.method = append(dst.method, h.method...)
dst.proto = append(dst.proto, h.proto...)
dst.requestURI = append(dst.requestURI, h.requestURI...)
dst.host = append(dst.host, h.host...)
dst.contentType = append(dst.contentType, h.contentType...)
dst.userAgent = append(dst.userAgent, h.userAgent...)
dst.trailer = append(dst.trailer, h.trailer...)
dst.h = copyArgs(dst.h, h.h)
dst.cookies = copyArgs(dst.cookies, h.cookies)
dst.cookiesCollected = h.cookiesCollected
dst.rawHeaders = append(dst.rawHeaders, h.rawHeaders...)
}
// VisitAll calls f for each header.
//
// f must not retain references to key and/or value after returning.
// Copy key and/or value contents before returning if you need retaining them.
func (h *ResponseHeader) VisitAll(f func(key, value []byte)) {
if len(h.contentLengthBytes) > 0 {
f(strContentLength, h.contentLengthBytes)
}
contentType := h.ContentType()
if len(contentType) > 0 {
f(strContentType, contentType)
}
contentEncoding := h.ContentEncoding()
if len(contentEncoding) > 0 {
f(strContentEncoding, contentEncoding)
}
server := h.Server()
if len(server) > 0 {
f(strServer, server)
}
if len(h.cookies) > 0 {
visitArgs(h.cookies, func(_, v []byte) {
f(strSetCookie, v)
})
}
if len(h.trailer) > 0 {
f(strTrailer, appendArgsKeyBytes(nil, h.trailer, strCommaSpace))
}
visitArgs(h.h, f)
if h.ConnectionClose() {
f(strConnection, strClose)
}
}
// VisitAllTrailer calls f for each response Trailer.
//
// f must not retain references to value after returning.
func (h *ResponseHeader) VisitAllTrailer(f func(value []byte)) {
visitArgsKey(h.trailer, f)
}
// VisitAllTrailer calls f for each request Trailer.
//
// f must not retain references to value after returning.
func (h *RequestHeader) VisitAllTrailer(f func(value []byte)) {
visitArgsKey(h.trailer, f)
}
// VisitAllCookie calls f for each response cookie.
//
// Cookie name is passed in key and the whole Set-Cookie header value
// is passed in value on each f invocation. Value may be parsed
// with Cookie.ParseBytes().
//
// f must not retain references to key and/or value after returning.
func (h *ResponseHeader) VisitAllCookie(f func(key, value []byte)) {
visitArgs(h.cookies, f)
}
// VisitAllCookie calls f for each request cookie.
//
// f must not retain references to key and/or value after returning.
func (h *RequestHeader) VisitAllCookie(f func(key, value []byte)) {
h.collectCookies()
visitArgs(h.cookies, f)
}
// VisitAll calls f for each header.
//
// f must not retain references to key and/or value after returning.
// Copy key and/or value contents before returning if you need retaining them.
//
// To get the headers in order they were received use VisitAllInOrder.
func (h *RequestHeader) VisitAll(f func(key, value []byte)) {
host := h.Host()
if len(host) > 0 {
f(strHost, host)
}
if len(h.contentLengthBytes) > 0 {
f(strContentLength, h.contentLengthBytes)
}
contentType := h.ContentType()
if len(contentType) > 0 {
f(strContentType, contentType)
}
userAgent := h.UserAgent()
if len(userAgent) > 0 {
f(strUserAgent, userAgent)
}
if len(h.trailer) > 0 {
f(strTrailer, appendArgsKeyBytes(nil, h.trailer, strCommaSpace))
}
h.collectCookies()
if len(h.cookies) > 0 {
h.bufKV.value = appendRequestCookieBytes(h.bufKV.value[:0], h.cookies)
f(strCookie, h.bufKV.value)
}
visitArgs(h.h, f)
if h.ConnectionClose() {
f(strConnection, strClose)
}
}
// VisitAllInOrder calls f for each header in the order they were received.
//
// f must not retain references to key and/or value after returning.
// Copy key and/or value contents before returning if you need retaining them.
//
// This function is slightly slower than VisitAll because it has to reparse the
// raw headers to get the order.
func (h *RequestHeader) VisitAllInOrder(f func(key, value []byte)) {
var s headerScanner
s.b = h.rawHeaders
s.disableNormalizing = h.disableNormalizing
for s.next() {
if len(s.key) > 0 {
f(s.key, s.value)
}
}
}
// Del deletes header with the given key.
func (h *ResponseHeader) Del(key string) {
k := getHeaderKeyBytes(&h.bufKV, key, h.disableNormalizing)
h.del(k)
}
// DelBytes deletes header with the given key.
func (h *ResponseHeader) DelBytes(key []byte) {
h.bufKV.key = append(h.bufKV.key[:0], key...)
normalizeHeaderKey(h.bufKV.key, h.disableNormalizing)
h.del(h.bufKV.key)
}
func (h *ResponseHeader) del(key []byte) {
switch string(key) {
case HeaderContentType:
h.contentType = h.contentType[:0]
case HeaderContentEncoding:
h.contentEncoding = h.contentEncoding[:0]
case HeaderServer:
h.server = h.server[:0]
case HeaderSetCookie:
h.cookies = h.cookies[:0]
case HeaderContentLength:
h.contentLength = 0
h.contentLengthBytes = h.contentLengthBytes[:0]
case HeaderConnection:
h.connectionClose = false
case HeaderTrailer:
h.trailer = h.trailer[:0]
}
h.h = delAllArgsBytes(h.h, key)
}
// Del deletes header with the given key.
func (h *RequestHeader) Del(key string) {
k := getHeaderKeyBytes(&h.bufKV, key, h.disableNormalizing)
h.del(k)
}
// DelBytes deletes header with the given key.
func (h *RequestHeader) DelBytes(key []byte) {
h.bufKV.key = append(h.bufKV.key[:0], key...)
normalizeHeaderKey(h.bufKV.key, h.disableNormalizing)
h.del(h.bufKV.key)
}
func (h *RequestHeader) del(key []byte) {
switch string(key) {
case HeaderHost:
h.host = h.host[:0]
case HeaderContentType:
h.contentType = h.contentType[:0]
case HeaderUserAgent:
h.userAgent = h.userAgent[:0]
case HeaderCookie:
h.cookies = h.cookies[:0]
case HeaderContentLength:
h.contentLength = 0
h.contentLengthBytes = h.contentLengthBytes[:0]
case HeaderConnection:
h.connectionClose = false
case HeaderTrailer:
h.trailer = h.trailer[:0]
}
h.h = delAllArgsBytes(h.h, key)
}
// setSpecialHeader handles special headers and return true when a header is processed.
func (h *ResponseHeader) setSpecialHeader(key, value []byte) bool {
if len(key) == 0 {
return false
}
switch key[0] | 0x20 {
case 'c':
switch {
case caseInsensitiveCompare(strContentType, key):
h.SetContentTypeBytes(value)
return true
case caseInsensitiveCompare(strContentLength, key):
if contentLength, err := parseContentLength(value); err == nil {
h.contentLength = contentLength
h.contentLengthBytes = append(h.contentLengthBytes[:0], value...)
}
return true
case caseInsensitiveCompare(strContentEncoding, key):
h.SetContentEncodingBytes(value)
return true
case caseInsensitiveCompare(strConnection, key):
if bytes.Equal(strClose, value) {
h.SetConnectionClose()
} else {
h.ResetConnectionClose()
h.setNonSpecial(key, value)
}
return true
}
case 's':
if caseInsensitiveCompare(strServer, key) {
h.SetServerBytes(value)
return true
} else if caseInsensitiveCompare(strSetCookie, key) {
var kv *argsKV
h.cookies, kv = allocArg(h.cookies)
kv.key = getCookieKey(kv.key, value)
kv.value = append(kv.value[:0], value...)
return true
}
case 't':
if caseInsensitiveCompare(strTransferEncoding, key) {
// Transfer-Encoding is managed automatically.
return true
} else if caseInsensitiveCompare(strTrailer, key) {
_ = h.SetTrailerBytes(value)
return true
}
case 'd':
if caseInsensitiveCompare(strDate, key) {
// Date is managed automatically.
return true
}
}
return false
}
// setNonSpecial directly put into map i.e. not a basic header
func (h *ResponseHeader) setNonSpecial(key []byte, value []byte) {
h.h = setArgBytes(h.h, key, value, argsHasValue)
}
// setSpecialHeader handles special headers and return true when a header is processed.
func (h *RequestHeader) setSpecialHeader(key, value []byte) bool {
if len(key) == 0 || h.disableSpecialHeader {
return false
}
switch key[0] | 0x20 {
case 'c':
switch {
case caseInsensitiveCompare(strContentType, key):
h.SetContentTypeBytes(value)
return true
case caseInsensitiveCompare(strContentLength, key):
if contentLength, err := parseContentLength(value); err == nil {
h.contentLength = contentLength
h.contentLengthBytes = append(h.contentLengthBytes[:0], value...)
}
return true
case caseInsensitiveCompare(strConnection, key):
if bytes.Equal(strClose, value) {
h.SetConnectionClose()
} else {
h.ResetConnectionClose()
h.setNonSpecial(key, value)
}
return true
case caseInsensitiveCompare(strCookie, key):
h.collectCookies()
h.cookies = parseRequestCookies(h.cookies, value)
return true
}
case 't':
if caseInsensitiveCompare(strTransferEncoding, key) {
// Transfer-Encoding is managed automatically.
return true
} else if caseInsensitiveCompare(strTrailer, key) {
_ = h.SetTrailerBytes(value)
return true
}
case 'h':
if caseInsensitiveCompare(strHost, key) {
h.SetHostBytes(value)
return true
}
case 'u':
if caseInsensitiveCompare(strUserAgent, key) {
h.SetUserAgentBytes(value)
return true
}
}
return false
}
// setNonSpecial directly put into map i.e. not a basic header
func (h *RequestHeader) setNonSpecial(key []byte, value []byte) {
h.h = setArgBytes(h.h, key, value, argsHasValue)
}
// Add adds the given 'key: value' header.
//
// Multiple headers with the same key may be added with this function.
// Use Set for setting a single header for the given key.
//
// the Content-Type, Content-Length, Connection, Server, Set-Cookie,
// Transfer-Encoding and Date headers can only be set once and will
// overwrite the previous value.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see AddTrailer for more details),
// it will be sent after the chunked response body.
func (h *ResponseHeader) Add(key, value string) {
h.AddBytesKV(s2b(key), s2b(value))
}
// AddBytesK adds the given 'key: value' header.
//
// Multiple headers with the same key may be added with this function.
// Use SetBytesK for setting a single header for the given key.
//
// the Content-Type, Content-Length, Connection, Server, Set-Cookie,
// Transfer-Encoding and Date headers can only be set once and will
// overwrite the previous value.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see AddTrailer for more details),
// it will be sent after the chunked response body.
func (h *ResponseHeader) AddBytesK(key []byte, value string) {
h.AddBytesKV(key, s2b(value))
}
// AddBytesV adds the given 'key: value' header.
//
// Multiple headers with the same key may be added with this function.
// Use SetBytesV for setting a single header for the given key.
//
// the Content-Type, Content-Length, Connection, Server, Set-Cookie,
// Transfer-Encoding and Date headers can only be set once and will
// overwrite the previous value.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see AddTrailer for more details),
// it will be sent after the chunked response body.
func (h *ResponseHeader) AddBytesV(key string, value []byte) {
h.AddBytesKV(s2b(key), value)
}
// AddBytesKV adds the given 'key: value' header.
//
// Multiple headers with the same key may be added with this function.
// Use SetBytesKV for setting a single header for the given key.
//
// the Content-Type, Content-Length, Connection, Server, Set-Cookie,
// Transfer-Encoding and Date headers can only be set once and will
// overwrite the previous value.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see AddTrailer for more details),
// it will be sent after the chunked response body.
func (h *ResponseHeader) AddBytesKV(key, value []byte) {
if h.setSpecialHeader(key, value) {
return
}
k := getHeaderKeyBytes(&h.bufKV, b2s(key), h.disableNormalizing)
h.h = appendArgBytes(h.h, k, value, argsHasValue)
}
// Set sets the given 'key: value' header.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see SetTrailer for more details),
// it will be sent after the chunked response body.
//
// Use Add for setting multiple header values under the same key.
func (h *ResponseHeader) Set(key, value string) {
initHeaderKV(&h.bufKV, key, value, h.disableNormalizing)
h.SetCanonical(h.bufKV.key, h.bufKV.value)
}
// SetBytesK sets the given 'key: value' header.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see SetTrailer for more details),
// it will be sent after the chunked response body.
//
// Use AddBytesK for setting multiple header values under the same key.
func (h *ResponseHeader) SetBytesK(key []byte, value string) {
h.bufKV.value = append(h.bufKV.value[:0], value...)
h.SetBytesKV(key, h.bufKV.value)
}
// SetBytesV sets the given 'key: value' header.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see SetTrailer for more details),
// it will be sent after the chunked response body.
//
// Use AddBytesV for setting multiple header values under the same key.
func (h *ResponseHeader) SetBytesV(key string, value []byte) {
k := getHeaderKeyBytes(&h.bufKV, key, h.disableNormalizing)
h.SetCanonical(k, value)
}
// SetBytesKV sets the given 'key: value' header.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see SetTrailer for more details),
// it will be sent after the chunked response body.
//
// Use AddBytesKV for setting multiple header values under the same key.
func (h *ResponseHeader) SetBytesKV(key, value []byte) {
h.bufKV.key = append(h.bufKV.key[:0], key...)
normalizeHeaderKey(h.bufKV.key, h.disableNormalizing)
h.SetCanonical(h.bufKV.key, value)
}
// SetCanonical sets the given 'key: value' header assuming that
// key is in canonical form.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see SetTrailer for more details),
// it will be sent after the chunked response body.
func (h *ResponseHeader) SetCanonical(key, value []byte) {
if h.setSpecialHeader(key, value) {
return
}
h.setNonSpecial(key, value)
}
// SetCookie sets the given response cookie.
//
// It is safe re-using the cookie after the function returns.
func (h *ResponseHeader) SetCookie(cookie *Cookie) {
h.cookies = setArgBytes(h.cookies, cookie.Key(), cookie.Cookie(), argsHasValue)
}
// SetCookie sets 'key: value' cookies.
func (h *RequestHeader) SetCookie(key, value string) {
h.collectCookies()
h.cookies = setArg(h.cookies, key, value, argsHasValue)
}
// SetCookieBytesK sets 'key: value' cookies.
func (h *RequestHeader) SetCookieBytesK(key []byte, value string) {
h.SetCookie(b2s(key), value)
}
// SetCookieBytesKV sets 'key: value' cookies.
func (h *RequestHeader) SetCookieBytesKV(key, value []byte) {
h.SetCookie(b2s(key), b2s(value))
}
// DelClientCookie instructs the client to remove the given cookie.
// This doesn't work for a cookie with specific domain or path,
// you should delete it manually like:
//
// c := AcquireCookie()
// c.SetKey(key)
// c.SetDomain("example.com")
// c.SetPath("/path")
// c.SetExpire(CookieExpireDelete)
// h.SetCookie(c)
// ReleaseCookie(c)
//
// Use DelCookie if you want just removing the cookie from response header.
func (h *ResponseHeader) DelClientCookie(key string) {
h.DelCookie(key)
c := AcquireCookie()
c.SetKey(key)
c.SetExpire(CookieExpireDelete)
h.SetCookie(c)
ReleaseCookie(c)
}
// DelClientCookieBytes instructs the client to remove the given cookie.
// This doesn't work for a cookie with specific domain or path,
// you should delete it manually like:
//
// c := AcquireCookie()
// c.SetKey(key)
// c.SetDomain("example.com")
// c.SetPath("/path")
// c.SetExpire(CookieExpireDelete)
// h.SetCookie(c)
// ReleaseCookie(c)
//
// Use DelCookieBytes if you want just removing the cookie from response header.
func (h *ResponseHeader) DelClientCookieBytes(key []byte) {
h.DelClientCookie(b2s(key))
}
// DelCookie removes cookie under the given key from response header.
//
// Note that DelCookie doesn't remove the cookie from the client.
// Use DelClientCookie instead.
func (h *ResponseHeader) DelCookie(key string) {
h.cookies = delAllArgs(h.cookies, key)
}
// DelCookieBytes removes cookie under the given key from response header.
//
// Note that DelCookieBytes doesn't remove the cookie from the client.
// Use DelClientCookieBytes instead.
func (h *ResponseHeader) DelCookieBytes(key []byte) {
h.DelCookie(b2s(key))
}
// DelCookie removes cookie under the given key.
func (h *RequestHeader) DelCookie(key string) {
h.collectCookies()
h.cookies = delAllArgs(h.cookies, key)
}
// DelCookieBytes removes cookie under the given key.
func (h *RequestHeader) DelCookieBytes(key []byte) {
h.DelCookie(b2s(key))
}
// DelAllCookies removes all the cookies from response headers.
func (h *ResponseHeader) DelAllCookies() {
h.cookies = h.cookies[:0]
}
// DelAllCookies removes all the cookies from request headers.
func (h *RequestHeader) DelAllCookies() {
h.collectCookies()
h.cookies = h.cookies[:0]
}
// Add adds the given 'key: value' header.
//
// Multiple headers with the same key may be added with this function.
// Use Set for setting a single header for the given key.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see AddTrailer for more details),
// it will be sent after the chunked request body.
func (h *RequestHeader) Add(key, value string) {
h.AddBytesKV(s2b(key), s2b(value))
}
// AddBytesK adds the given 'key: value' header.
//
// Multiple headers with the same key may be added with this function.
// Use SetBytesK for setting a single header for the given key.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see AddTrailer for more details),
// it will be sent after the chunked request body.
func (h *RequestHeader) AddBytesK(key []byte, value string) {
h.AddBytesKV(key, s2b(value))
}
// AddBytesV adds the given 'key: value' header.
//
// Multiple headers with the same key may be added with this function.
// Use SetBytesV for setting a single header for the given key.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see AddTrailer for more details),
// it will be sent after the chunked request body.
func (h *RequestHeader) AddBytesV(key string, value []byte) {
h.AddBytesKV(s2b(key), value)
}
// AddBytesKV adds the given 'key: value' header.
//
// Multiple headers with the same key may be added with this function.
// Use SetBytesKV for setting a single header for the given key.
//
// the Content-Type, Content-Length, Connection, Cookie,
// Transfer-Encoding, Host and User-Agent headers can only be set once
// and will overwrite the previous value.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see AddTrailer for more details),
// it will be sent after the chunked request body.
func (h *RequestHeader) AddBytesKV(key, value []byte) {
if h.setSpecialHeader(key, value) {
return
}
k := getHeaderKeyBytes(&h.bufKV, b2s(key), h.disableNormalizing)
h.h = appendArgBytes(h.h, k, value, argsHasValue)
}
// Set sets the given 'key: value' header.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see SetTrailer for more details),
// it will be sent after the chunked request body.
//
// Use Add for setting multiple header values under the same key.
func (h *RequestHeader) Set(key, value string) {
initHeaderKV(&h.bufKV, key, value, h.disableNormalizing)
h.SetCanonical(h.bufKV.key, h.bufKV.value)
}
// SetBytesK sets the given 'key: value' header.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see SetTrailer for more details),
// it will be sent after the chunked request body.
//
// Use AddBytesK for setting multiple header values under the same key.
func (h *RequestHeader) SetBytesK(key []byte, value string) {
h.bufKV.value = append(h.bufKV.value[:0], value...)
h.SetBytesKV(key, h.bufKV.value)
}
// SetBytesV sets the given 'key: value' header.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see SetTrailer for more details),
// it will be sent after the chunked request body.
//
// Use AddBytesV for setting multiple header values under the same key.
func (h *RequestHeader) SetBytesV(key string, value []byte) {
k := getHeaderKeyBytes(&h.bufKV, key, h.disableNormalizing)
h.SetCanonical(k, value)
}
// SetBytesKV sets the given 'key: value' header.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see SetTrailer for more details),
// it will be sent after the chunked request body.
//
// Use AddBytesKV for setting multiple header values under the same key.
func (h *RequestHeader) SetBytesKV(key, value []byte) {
h.bufKV.key = append(h.bufKV.key[:0], key...)
normalizeHeaderKey(h.bufKV.key, h.disableNormalizing)
h.SetCanonical(h.bufKV.key, value)
}
// SetCanonical sets the given 'key: value' header assuming that
// key is in canonical form.
//
// If the header is set as a Trailer (forbidden trailers will not be set, see SetTrailer for more details),
// it will be sent after the chunked request body.
func (h *RequestHeader) SetCanonical(key, value []byte) {
if h.setSpecialHeader(key, value) {
return
}
h.setNonSpecial(key, value)
}
// Peek returns header value for the given key.
//
// The returned value is valid until the response is released,
// either though ReleaseResponse or your request handler returning.
// Do not store references to the returned value. Make copies instead.
func (h *ResponseHeader) Peek(key string) []byte {
k := getHeaderKeyBytes(&h.bufKV, key, h.disableNormalizing)
return h.peek(k)
}
// PeekBytes returns header value for the given key.
//
// The returned value is valid until the response is released,
// either though ReleaseResponse or your request handler returning.
// Do not store references to returned value. Make copies instead.
func (h *ResponseHeader) PeekBytes(key []byte) []byte {
h.bufKV.key = append(h.bufKV.key[:0], key...)
normalizeHeaderKey(h.bufKV.key, h.disableNormalizing)
return h.peek(h.bufKV.key)
}
// Peek returns header value for the given key.
//
// The returned value is valid until the request is released,
// either though ReleaseRequest or your request handler returning.
// Do not store references to returned value. Make copies instead.
func (h *RequestHeader) Peek(key string) []byte {
k := getHeaderKeyBytes(&h.bufKV, key, h.disableNormalizing)
return h.peek(k)
}
// PeekBytes returns header value for the given key.
//
// The returned value is valid until the request is released,
// either though ReleaseRequest or your request handler returning.
// Do not store references to returned value. Make copies instead.
func (h *RequestHeader) PeekBytes(key []byte) []byte {
h.bufKV.key = append(h.bufKV.key[:0], key...)
normalizeHeaderKey(h.bufKV.key, h.disableNormalizing)
return h.peek(h.bufKV.key)
}
func (h *ResponseHeader) peek(key []byte) []byte {
switch string(key) {
case HeaderContentType:
return h.ContentType()
case HeaderContentEncoding:
return h.ContentEncoding()
case HeaderServer:
return h.Server()
case HeaderConnection:
if h.ConnectionClose() {
return strClose
}
return peekArgBytes(h.h, key)
case HeaderContentLength:
return h.contentLengthBytes
case HeaderSetCookie:
return appendResponseCookieBytes(nil, h.cookies)
case HeaderTrailer:
return appendArgsKeyBytes(nil, h.trailer, strCommaSpace)
default:
return peekArgBytes(h.h, key)
}
}
func (h *RequestHeader) peek(key []byte) []byte {
switch string(key) {
case HeaderHost:
return h.Host()
case HeaderContentType:
return h.ContentType()
case HeaderUserAgent:
return h.UserAgent()
case HeaderConnection:
if h.ConnectionClose() {
return strClose
}
return peekArgBytes(h.h, key)
case HeaderContentLength:
return h.contentLengthBytes
case HeaderCookie:
if h.cookiesCollected {
return appendRequestCookieBytes(nil, h.cookies)
}
return peekArgBytes(h.h, key)
case HeaderTrailer:
return appendArgsKeyBytes(nil, h.trailer, strCommaSpace)
default:
return peekArgBytes(h.h, key)
}
}
// PeekAll returns all header value for the given key.
//
// The returned value is valid until the request is released,
// either though ReleaseRequest or your request handler returning.
// Any future calls to the Peek* will modify the returned value.
// Do not store references to returned value. Make copies instead.
func (h *RequestHeader) PeekAll(key string) [][]byte {
k := getHeaderKeyBytes(&h.bufKV, key, h.disableNormalizing)
return h.peekAll(k)
}
func (h *RequestHeader) peekAll(key []byte) [][]byte {
h.mulHeader = h.mulHeader[:0]
switch string(key) {
case HeaderHost:
if host := h.Host(); len(host) > 0 {
h.mulHeader = append(h.mulHeader, host)
}
case HeaderContentType:
if contentType := h.ContentType(); len(contentType) > 0 {
h.mulHeader = append(h.mulHeader, contentType)
}
case HeaderUserAgent:
if ua := h.UserAgent(); len(ua) > 0 {
h.mulHeader = append(h.mulHeader, ua)
}
case HeaderConnection:
if h.ConnectionClose() {
h.mulHeader = append(h.mulHeader, strClose)
} else {
h.mulHeader = peekAllArgBytesToDst(h.mulHeader, h.h, key)
}
case HeaderContentLength:
h.mulHeader = append(h.mulHeader, h.contentLengthBytes)
case HeaderCookie:
if h.cookiesCollected {
h.mulHeader = append(h.mulHeader, appendRequestCookieBytes(nil, h.cookies))
} else {
h.mulHeader = peekAllArgBytesToDst(h.mulHeader, h.h, key)
}
case HeaderTrailer:
h.mulHeader = append(h.mulHeader, appendArgsKeyBytes(nil, h.trailer, strCommaSpace))
default:
h.mulHeader = peekAllArgBytesToDst(h.mulHeader, h.h, key)
}
return h.mulHeader
}
// PeekAll returns all header value for the given key.
//
// The returned value is valid until the request is released,
// either though ReleaseResponse or your request handler returning.
// Any future calls to the Peek* will modify the returned value.
// Do not store references to returned value. Make copies instead.
func (h *ResponseHeader) PeekAll(key string) [][]byte {
k := getHeaderKeyBytes(&h.bufKV, key, h.disableNormalizing)
return h.peekAll(k)
}
func (h *ResponseHeader) peekAll(key []byte) [][]byte {
h.mulHeader = h.mulHeader[:0]
switch string(key) {
case HeaderContentType:
if contentType := h.ContentType(); len(contentType) > 0 {
h.mulHeader = append(h.mulHeader, contentType)
}
case HeaderContentEncoding:
if contentEncoding := h.ContentEncoding(); len(contentEncoding) > 0 {
h.mulHeader = append(h.mulHeader, contentEncoding)
}
case HeaderServer:
if server := h.Server(); len(server) > 0 {
h.mulHeader = append(h.mulHeader, server)
}
case HeaderConnection:
if h.ConnectionClose() {
h.mulHeader = append(h.mulHeader, strClose)
} else {
h.mulHeader = peekAllArgBytesToDst(h.mulHeader, h.h, key)
}
case HeaderContentLength:
h.mulHeader = append(h.mulHeader, h.contentLengthBytes)
case HeaderSetCookie:
h.mulHeader = append(h.mulHeader, appendResponseCookieBytes(nil, h.cookies))
case HeaderTrailer:
h.mulHeader = append(h.mulHeader, appendArgsKeyBytes(nil, h.trailer, strCommaSpace))
default:
h.mulHeader = peekAllArgBytesToDst(h.mulHeader, h.h, key)
}
return h.mulHeader
}
// PeekKeys return all header keys.
//
// The returned value is valid until the request is released,
// either though ReleaseRequest or your request handler returning.
// Any future calls to the Peek* will modify the returned value.
// Do not store references to returned value. Make copies instead.
func (h *RequestHeader) PeekKeys() [][]byte {
h.mulHeader = h.mulHeader[:0]
h.mulHeader = peekArgsKeys(h.mulHeader, h.h)
return h.mulHeader
}
// PeekTrailerKeys return all trailer keys.
//
// The returned value is valid until the request is released,
// either though ReleaseRequest or your request handler returning.
// Any future calls to the Peek* will modify the returned value.
// Do not store references to returned value. Make copies instead.
func (h *RequestHeader) PeekTrailerKeys() [][]byte {
h.mulHeader = h.mulHeader[:0]
h.mulHeader = peekArgsKeys(h.mulHeader, h.trailer)
return h.mulHeader
}
// PeekKeys return all header keys.
//
// The returned value is valid until the request is released,
// either though ReleaseResponse or your request handler returning.
// Any future calls to the Peek* will modify the returned value.
// Do not store references to returned value. Make copies instead.
func (h *ResponseHeader) PeekKeys() [][]byte {
h.mulHeader = h.mulHeader[:0]
h.mulHeader = peekArgsKeys(h.mulHeader, h.h)
return h.mulHeader
}
// PeekTrailerKeys return all trailer keys.
//
// The returned value is valid until the request is released,
// either though ReleaseResponse or your request handler returning.
// Any future calls to the Peek* will modify the returned value.
// Do not store references to returned value. Make copies instead.
func (h *ResponseHeader) PeekTrailerKeys() [][]byte {
h.mulHeader = h.mulHeader[:0]
h.mulHeader = peekArgsKeys(h.mulHeader, h.trailer)
return h.mulHeader
}
// Cookie returns cookie for the given key.
func (h *RequestHeader) Cookie(key string) []byte {
h.collectCookies()
return peekArgStr(h.cookies, key)
}
// CookieBytes returns cookie for the given key.
func (h *RequestHeader) CookieBytes(key []byte) []byte {
h.collectCookies()
return peekArgBytes(h.cookies, key)
}
// Cookie fills cookie for the given cookie.Key.
//
// Returns false if cookie with the given cookie.Key is missing.
func (h *ResponseHeader) Cookie(cookie *Cookie) bool {
v := peekArgBytes(h.cookies, cookie.Key())
if v == nil {
return false
}
cookie.ParseBytes(v) //nolint:errcheck
return true
}
// Read reads response header from r.
//
// io.EOF is returned if r is closed before reading the first header byte.
func (h *ResponseHeader) Read(r *bufio.Reader) error {
n := 1
for {
err := h.tryRead(r, n)
if err == nil {
return nil
}
if err != errNeedMore {
h.resetSkipNormalize()
return err
}
n = r.Buffered() + 1
}
}
func (h *ResponseHeader) tryRead(r *bufio.Reader, n int) error {
h.resetSkipNormalize()
b, err := r.Peek(n)
if len(b) == 0 {
// Return ErrTimeout on any timeout.
if x, ok := err.(interface{ Timeout() bool }); ok && x.Timeout() {
return ErrTimeout
}
// treat all other errors on the first byte read as EOF
if n == 1 || err == io.EOF {
return io.EOF
}
// This is for go 1.6 bug. See https://github.com/golang/go/issues/14121 .
if err == bufio.ErrBufferFull {
if h.secureErrorLogMessage {
return &ErrSmallBuffer{
error: fmt.Errorf("error when reading response headers"),
}
}
return &ErrSmallBuffer{
error: fmt.Errorf("error when reading response headers: %w", errSmallBuffer),
}
}
return fmt.Errorf("error when reading response headers: %w", err)
}
b = mustPeekBuffered(r)
headersLen, errParse := h.parse(b)
if errParse != nil {
return headerError("response", err, errParse, b, h.secureErrorLogMessage)
}
mustDiscard(r, headersLen)
return nil
}
// ReadTrailer reads response trailer header from r.
//
// io.EOF is returned if r is closed before reading the first byte.
func (h *ResponseHeader) ReadTrailer(r *bufio.Reader) error {
n := 1
for {
err := h.tryReadTrailer(r, n)
if err == nil {
return nil
}
if err != errNeedMore {
return err
}
n = r.Buffered() + 1
}
}
func (h *ResponseHeader) tryReadTrailer(r *bufio.Reader, n int) error {
b, err := r.Peek(n)
if len(b) == 0 {
// Return ErrTimeout on any timeout.
if x, ok := err.(interface{ Timeout() bool }); ok && x.Timeout() {
return ErrTimeout
}
if n == 1 || err == io.EOF {
return io.EOF
}
// This is for go 1.6 bug. See https://github.com/golang/go/issues/14121 .
if err == bufio.ErrBufferFull {
if h.secureErrorLogMessage {
return &ErrSmallBuffer{
error: fmt.Errorf("error when reading response trailer"),
}
}
return &ErrSmallBuffer{
error: fmt.Errorf("error when reading response trailer: %w", errSmallBuffer),
}
}
return fmt.Errorf("error when reading response trailer: %w", err)
}
b = mustPeekBuffered(r)
headersLen, errParse := h.parseTrailer(b)
if errParse != nil {
if err == io.EOF {
return err
}
return headerError("response", err, errParse, b, h.secureErrorLogMessage)
}
mustDiscard(r, headersLen)
return nil
}
func headerError(typ string, err, errParse error, b []byte, secureErrorLogMessage bool) error {
if errParse != errNeedMore {
return headerErrorMsg(typ, errParse, b, secureErrorLogMessage)
}
if err == nil {
return errNeedMore
}
// Buggy servers may leave trailing CRLFs after http body.
// Treat this case as EOF.
if isOnlyCRLF(b) {
return io.EOF
}
if err != bufio.ErrBufferFull {
return headerErrorMsg(typ, err, b, secureErrorLogMessage)
}
return &ErrSmallBuffer{
error: headerErrorMsg(typ, errSmallBuffer, b, secureErrorLogMessage),
}
}
func headerErrorMsg(typ string, err error, b []byte, secureErrorLogMessage bool) error {
if secureErrorLogMessage {
return fmt.Errorf("error when reading %s headers: %w. Buffer size=%d", typ, err, len(b))
}
return fmt.Errorf("error when reading %s headers: %w. Buffer size=%d, contents: %s", typ, err, len(b), bufferSnippet(b))
}
// Read reads request header from r.
//
// io.EOF is returned if r is closed before reading the first header byte.
func (h *RequestHeader) Read(r *bufio.Reader) error {
return h.readLoop(r, true)
}
// readLoop reads request header from r optionally loops until it has enough data.
//
// io.EOF is returned if r is closed before reading the first header byte.
func (h *RequestHeader) readLoop(r *bufio.Reader, waitForMore bool) error {
n := 1
for {
err := h.tryRead(r, n)
if err == nil {
return nil
}
if !waitForMore || err != errNeedMore {
h.resetSkipNormalize()
return err
}
n = r.Buffered() + 1
}
}
// ReadTrailer reads request trailer header from r.
//
// io.EOF is returned if r is closed before reading the first byte.
func (h *RequestHeader) ReadTrailer(r *bufio.Reader) error {
n := 1
for {
err := h.tryReadTrailer(r, n)
if err == nil {
return nil
}
if err != errNeedMore {
return err
}
n = r.Buffered() + 1
}
}
func (h *RequestHeader) tryReadTrailer(r *bufio.Reader, n int) error {
b, err := r.Peek(n)
if len(b) == 0 {
// Return ErrTimeout on any timeout.
if x, ok := err.(interface{ Timeout() bool }); ok && x.Timeout() {
return ErrTimeout
}
if n == 1 || err == io.EOF {
return io.EOF
}
// This is for go 1.6 bug. See https://github.com/golang/go/issues/14121 .
if err == bufio.ErrBufferFull {
if h.secureErrorLogMessage {
return &ErrSmallBuffer{
error: fmt.Errorf("error when reading request trailer"),
}
}
return &ErrSmallBuffer{
error: fmt.Errorf("error when reading request trailer: %w", errSmallBuffer),
}
}
return fmt.Errorf("error when reading request trailer: %w", err)
}
b = mustPeekBuffered(r)
headersLen, errParse := h.parseTrailer(b)
if errParse != nil {
if err == io.EOF {
return err
}
return headerError("request", err, errParse, b, h.secureErrorLogMessage)
}
mustDiscard(r, headersLen)
return nil
}
func (h *RequestHeader) tryRead(r *bufio.Reader, n int) error {
h.resetSkipNormalize()
b, err := r.Peek(n)
if len(b) == 0 {
if err == io.EOF {
return err
}
if err == nil {
panic("bufio.Reader.Peek() returned nil, nil")
}
// This is for go 1.6 bug. See https://github.com/golang/go/issues/14121 .
if err == bufio.ErrBufferFull {
return &ErrSmallBuffer{
error: fmt.Errorf("error when reading request headers: %w (n=%d, r.Buffered()=%d)", errSmallBuffer, n, r.Buffered()),
}
}
// n == 1 on the first read for the request.
if n == 1 {
// We didn't read a single byte.
return ErrNothingRead{err}
}
return fmt.Errorf("error when reading request headers: %w", err)
}
b = mustPeekBuffered(r)
headersLen, errParse := h.parse(b)
if errParse != nil {
return headerError("request", err, errParse, b, h.secureErrorLogMessage)
}
mustDiscard(r, headersLen)
return nil
}
func bufferSnippet(b []byte) string {
n := len(b)
start := 200
end := n - start
if start >= end {
start = n
end = n
}
bStart, bEnd := b[:start], b[end:]
if len(bEnd) == 0 {
return fmt.Sprintf("%q", b)
}
return fmt.Sprintf("%q...%q", bStart, bEnd)
}
func isOnlyCRLF(b []byte) bool {
for _, ch := range b {
if ch != rChar && ch != nChar {
return false
}
}
return true
}
func updateServerDate() {
refreshServerDate()
go func() {
for {
time.Sleep(time.Second)
refreshServerDate()
}
}()
}
var (
serverDate atomic.Value
serverDateOnce sync.Once // serverDateOnce.Do(updateServerDate)
)
func refreshServerDate() {
b := AppendHTTPDate(nil, time.Now())
serverDate.Store(b)
}
// Write writes response header to w.
func (h *ResponseHeader) Write(w *bufio.Writer) error {
_, err := w.Write(h.Header())
return err
}
// WriteTo writes response header to w.
//
// WriteTo implements io.WriterTo interface.
func (h *ResponseHeader) WriteTo(w io.Writer) (int64, error) {
n, err := w.Write(h.Header())
return int64(n), err
}
// Header returns response header representation.
//
// Headers that set as Trailer will not represent. Use TrailerHeader for trailers.
//
// The returned value is valid until the request is released,
// either though ReleaseRequest or your request handler returning.
// Do not store references to returned value. Make copies instead.
func (h *ResponseHeader) Header() []byte {
h.bufKV.value = h.AppendBytes(h.bufKV.value[:0])
return h.bufKV.value
}
// writeTrailer writes response trailer to w.
func (h *ResponseHeader) writeTrailer(w *bufio.Writer) error {
_, err := w.Write(h.TrailerHeader())
return err
}
// TrailerHeader returns response trailer header representation.
//
// Trailers will only be received with chunked transfer.
//
// The returned value is valid until the request is released,
// either though ReleaseRequest or your request handler returning.
// Do not store references to returned value. Make copies instead.
func (h *ResponseHeader) TrailerHeader() []byte {
h.bufKV.value = h.bufKV.value[:0]
for _, t := range h.trailer {
value := h.peek(t.key)
h.bufKV.value = appendHeaderLine(h.bufKV.value, t.key, value)
}
h.bufKV.value = append(h.bufKV.value, strCRLF...)
return h.bufKV.value
}
// String returns response header representation.
func (h *ResponseHeader) String() string {
return string(h.Header())
}
// appendStatusLine appends the response status line to dst and returns
// the extended dst.
func (h *ResponseHeader) appendStatusLine(dst []byte) []byte {
statusCode := h.StatusCode()
if statusCode < 0 {
statusCode = StatusOK
}
return formatStatusLine(dst, h.Protocol(), statusCode, h.StatusMessage())
}
// AppendBytes appends response header representation to dst and returns
// the extended dst.
func (h *ResponseHeader) AppendBytes(dst []byte) []byte {
dst = h.appendStatusLine(dst[:0])
server := h.Server()
if len(server) != 0 {
dst = appendHeaderLine(dst, strServer, server)
}
if !h.noDefaultDate {
serverDateOnce.Do(updateServerDate)
dst = appendHeaderLine(dst, strDate, serverDate.Load().([]byte))
}
// Append Content-Type only for non-zero responses
// or if it is explicitly set.
// See https://github.com/valyala/fasthttp/issues/28 .
if h.ContentLength() != 0 || len(h.contentType) > 0 {
contentType := h.ContentType()
if len(contentType) > 0 {
dst = appendHeaderLine(dst, strContentType, contentType)
}
}
contentEncoding := h.ContentEncoding()
if len(contentEncoding) > 0 {
dst = appendHeaderLine(dst, strContentEncoding, contentEncoding)
}
if len(h.contentLengthBytes) > 0 {
dst = appendHeaderLine(dst, strContentLength, h.contentLengthBytes)
}
for i, n := 0, len(h.h); i < n; i++ {
kv := &h.h[i]
// Exclude trailer from header
exclude := false
for _, t := range h.trailer {
if bytes.Equal(kv.key, t.key) {
exclude = true
break
}
}
if !exclude && (h.noDefaultDate || !bytes.Equal(kv.key, strDate)) {
dst = appendHeaderLine(dst, kv.key, kv.value)
}
}
if len(h.trailer) > 0 {
dst = appendHeaderLine(dst, strTrailer, appendArgsKeyBytes(nil, h.trailer, strCommaSpace))
}
n := len(h.cookies)
if n > 0 {
for i := 0; i < n; i++ {
kv := &h.cookies[i]
dst = appendHeaderLine(dst, strSetCookie, kv.value)
}
}
if h.ConnectionClose() {
dst = appendHeaderLine(dst, strConnection, strClose)
}
return append(dst, strCRLF...)
}
// Write writes request header to w.
func (h *RequestHeader) Write(w *bufio.Writer) error {
_, err := w.Write(h.Header())
return err
}
// WriteTo writes request header to w.
//
// WriteTo implements io.WriterTo interface.
func (h *RequestHeader) WriteTo(w io.Writer) (int64, error) {
n, err := w.Write(h.Header())
return int64(n), err
}
// Header returns request header representation.
//
// Headers that set as Trailer will not represent. Use TrailerHeader for trailers.
//
// The returned value is valid until the request is released,
// either though ReleaseRequest or your request handler returning.
// Do not store references to returned value. Make copies instead.
func (h *RequestHeader) Header() []byte {
h.bufKV.value = h.AppendBytes(h.bufKV.value[:0])
return h.bufKV.value
}
// writeTrailer writes request trailer to w.
func (h *RequestHeader) writeTrailer(w *bufio.Writer) error {
_, err := w.Write(h.TrailerHeader())
return err
}
// TrailerHeader returns request trailer header representation.
//
// Trailers will only be received with chunked transfer.
//
// The returned value is valid until the request is released,
// either though ReleaseRequest or your request handler returning.
// Do not store references to returned value. Make copies instead.
func (h *RequestHeader) TrailerHeader() []byte {
h.bufKV.value = h.bufKV.value[:0]
for _, t := range h.trailer {
value := h.peek(t.key)
h.bufKV.value = appendHeaderLine(h.bufKV.value, t.key, value)
}
h.bufKV.value = append(h.bufKV.value, strCRLF...)
return h.bufKV.value
}
// RawHeaders returns raw header key/value bytes.
//
// Depending on server configuration, header keys may be normalized to
// capital-case in place.
//
// This copy is set aside during parsing, so empty slice is returned for all
// cases where parsing did not happen. Similarly, request line is not stored
// during parsing and can not be returned.
//
// The slice is not safe to use after the handler returns.
func (h *RequestHeader) RawHeaders() []byte {
return h.rawHeaders
}
// String returns request header representation.
func (h *RequestHeader) String() string {
return string(h.Header())
}
// AppendBytes appends request header representation to dst and returns
// the extended dst.
func (h *RequestHeader) AppendBytes(dst []byte) []byte {
dst = append(dst, h.Method()...)
dst = append(dst, ' ')
dst = append(dst, h.RequestURI()...)
dst = append(dst, ' ')
dst = append(dst, h.Protocol()...)
dst = append(dst, strCRLF...)
userAgent := h.UserAgent()
if len(userAgent) > 0 && !h.disableSpecialHeader {
dst = appendHeaderLine(dst, strUserAgent, userAgent)
}
host := h.Host()
if len(host) > 0 && !h.disableSpecialHeader {
dst = appendHeaderLine(dst, strHost, host)
}
contentType := h.ContentType()
if !h.noDefaultContentType && len(contentType) == 0 && !h.ignoreBody() {
contentType = strDefaultContentType
}
if len(contentType) > 0 && !h.disableSpecialHeader {
dst = appendHeaderLine(dst, strContentType, contentType)
}
if len(h.contentLengthBytes) > 0 && !h.disableSpecialHeader {
dst = appendHeaderLine(dst, strContentLength, h.contentLengthBytes)
}
for i, n := 0, len(h.h); i < n; i++ {
kv := &h.h[i]
// Exclude trailer from header
exclude := false
for _, t := range h.trailer {
if bytes.Equal(kv.key, t.key) {
exclude = true
break
}
}
if !exclude {
dst = appendHeaderLine(dst, kv.key, kv.value)
}
}
if len(h.trailer) > 0 {
dst = appendHeaderLine(dst, strTrailer, appendArgsKeyBytes(nil, h.trailer, strCommaSpace))
}
// there is no need in h.collectCookies() here, since if cookies aren't collected yet,
// they all are located in h.h.
n := len(h.cookies)
if n > 0 && !h.disableSpecialHeader {
dst = append(dst, strCookie...)
dst = append(dst, strColonSpace...)
dst = appendRequestCookieBytes(dst, h.cookies)
dst = append(dst, strCRLF...)
}
if h.ConnectionClose() && !h.disableSpecialHeader {
dst = appendHeaderLine(dst, strConnection, strClose)
}
return append(dst, strCRLF...)
}
func appendHeaderLine(dst, key, value []byte) []byte {
dst = append(dst, key...)
dst = append(dst, strColonSpace...)
dst = append(dst, value...)
return append(dst, strCRLF...)
}
func (h *ResponseHeader) parse(buf []byte) (int, error) {
m, err := h.parseFirstLine(buf)
if err != nil {
return 0, err
}
n, err := h.parseHeaders(buf[m:])
if err != nil {
return 0, err
}
return m + n, nil
}
func (h *ResponseHeader) parseTrailer(buf []byte) (int, error) {
// Skip any 0 length chunk.
if buf[0] == '0' {
skip := len(strCRLF) + 1
if len(buf) < skip {
return 0, io.EOF
}
buf = buf[skip:]
}
var s headerScanner
s.b = buf
s.disableNormalizing = h.disableNormalizing
var err error
for s.next() {
if len(s.key) > 0 {
if bytes.IndexByte(s.key, ' ') != -1 || bytes.IndexByte(s.key, '\t') != -1 {
err = fmt.Errorf("invalid trailer key %q", s.key)
continue
}
// Forbidden by RFC 7230, section 4.1.2
if isBadTrailer(s.key) {
err = fmt.Errorf("forbidden trailer key %q", s.key)
continue
}
h.h = appendArgBytes(h.h, s.key, s.value, argsHasValue)
}
}
if s.err != nil {
return 0, s.err
}
if err != nil {
return 0, err
}
return s.hLen, nil
}
func (h *RequestHeader) ignoreBody() bool {
return h.IsGet() || h.IsHead()
}
func (h *RequestHeader) parse(buf []byte) (int, error) {
m, err := h.parseFirstLine(buf)
if err != nil {
return 0, err
}
h.rawHeaders, _, err = readRawHeaders(h.rawHeaders[:0], buf[m:])
if err != nil {
return 0, err
}
var n int
n, err = h.parseHeaders(buf[m:])
if err != nil {
return 0, err
}
return m + n, nil
}
func (h *RequestHeader) parseTrailer(buf []byte) (int, error) {
// Skip any 0 length chunk.
if buf[0] == '0' {
skip := len(strCRLF) + 1
if len(buf) < skip {
return 0, io.EOF
}
buf = buf[skip:]
}
var s headerScanner
s.b = buf
s.disableNormalizing = h.disableNormalizing
var err error
for s.next() {
if len(s.key) > 0 {
if bytes.IndexByte(s.key, ' ') != -1 || bytes.IndexByte(s.key, '\t') != -1 {
err = fmt.Errorf("invalid trailer key %q", s.key)
continue
}
// Forbidden by RFC 7230, section 4.1.2
if isBadTrailer(s.key) {
err = fmt.Errorf("forbidden trailer key %q", s.key)
continue
}
h.h = appendArgBytes(h.h, s.key, s.value, argsHasValue)
}
}
if s.err != nil {
return 0, s.err
}
if err != nil {
return 0, err
}
return s.hLen, nil
}
func isBadTrailer(key []byte) bool {
if len(key) == 0 {
return true
}
switch key[0] | 0x20 {
case 'a':
return caseInsensitiveCompare(key, strAuthorization)
case 'c':
if len(key) > len(HeaderContentType) && caseInsensitiveCompare(key[:8], strContentType[:8]) {
// skip compare prefix 'Content-'
return caseInsensitiveCompare(key[8:], strContentEncoding[8:]) ||
caseInsensitiveCompare(key[8:], strContentLength[8:]) ||
caseInsensitiveCompare(key[8:], strContentType[8:]) ||
caseInsensitiveCompare(key[8:], strContentRange[8:])
}
return caseInsensitiveCompare(key, strConnection)
case 'e':
return caseInsensitiveCompare(key, strExpect)
case 'h':
return caseInsensitiveCompare(key, strHost)
case 'k':
return caseInsensitiveCompare(key, strKeepAlive)
case 'm':
return caseInsensitiveCompare(key, strMaxForwards)
case 'p':
if len(key) > len(HeaderProxyConnection) && caseInsensitiveCompare(key[:6], strProxyConnection[:6]) {
// skip compare prefix 'Proxy-'
return caseInsensitiveCompare(key[6:], strProxyConnection[6:]) ||
caseInsensitiveCompare(key[6:], strProxyAuthenticate[6:]) ||
caseInsensitiveCompare(key[6:], strProxyAuthorization[6:])
}
case 'r':
return caseInsensitiveCompare(key, strRange)
case 't':
return caseInsensitiveCompare(key, strTE) ||
caseInsensitiveCompare(key, strTrailer) ||
caseInsensitiveCompare(key, strTransferEncoding)
case 'w':
return caseInsensitiveCompare(key, strWWWAuthenticate)
}
return false
}
func (h *ResponseHeader) parseFirstLine(buf []byte) (int, error) {
bNext := buf
var b []byte
var err error
for len(b) == 0 {
if b, bNext, err = nextLine(bNext); err != nil {
return 0, err
}
}
// parse protocol
n := bytes.IndexByte(b, ' ')
if n < 0 {
if h.secureErrorLogMessage {
return 0, fmt.Errorf("cannot find whitespace in the first line of response")
}
return 0, fmt.Errorf("cannot find whitespace in the first line of response %q", buf)
}
h.noHTTP11 = !bytes.Equal(b[:n], strHTTP11)
b = b[n+1:]
// parse status code
h.statusCode, n, err = parseUintBuf(b)
if err != nil {
if h.secureErrorLogMessage {
return 0, fmt.Errorf("cannot parse response status code: %w", err)
}
return 0, fmt.Errorf("cannot parse response status code: %w. Response %q", err, buf)
}
if len(b) > n && b[n] != ' ' {
if h.secureErrorLogMessage {
return 0, fmt.Errorf("unexpected char at the end of status code")
}
return 0, fmt.Errorf("unexpected char at the end of status code. Response %q", buf)
}
if len(b) > n+1 {
h.SetStatusMessage(b[n+1:])
}
return len(buf) - len(bNext), nil
}
func (h *RequestHeader) parseFirstLine(buf []byte) (int, error) {
bNext := buf
var b []byte
var err error
for len(b) == 0 {
if b, bNext, err = nextLine(bNext); err != nil {
return 0, err
}
}
// parse method
n := bytes.IndexByte(b, ' ')
if n <= 0 {
if h.secureErrorLogMessage {
return 0, fmt.Errorf("cannot find http request method")
}
return 0, fmt.Errorf("cannot find http request method in %q", buf)
}
h.method = append(h.method[:0], b[:n]...)
b = b[n+1:]
protoStr := strHTTP11
// parse requestURI
n = bytes.LastIndexByte(b, ' ')
switch {
case n < 0:
h.noHTTP11 = true
n = len(b)
protoStr = strHTTP10
case n == 0:
if h.secureErrorLogMessage {
return 0, fmt.Errorf("requestURI cannot be empty")
}
return 0, fmt.Errorf("requestURI cannot be empty in %q", buf)
case !bytes.Equal(b[n+1:], strHTTP11):
h.noHTTP11 = true
protoStr = b[n+1:]
}
h.proto = append(h.proto[:0], protoStr...)
h.requestURI = append(h.requestURI[:0], b[:n]...)
return len(buf) - len(bNext), nil
}
func readRawHeaders(dst, buf []byte) ([]byte, int, error) {
n := bytes.IndexByte(buf, nChar)
if n < 0 {
return dst[:0], 0, errNeedMore
}
if (n == 1 && buf[0] == rChar) || n == 0 {
// empty headers
return dst, n + 1, nil
}
n++
b := buf
m := n
for {
b = b[m:]
m = bytes.IndexByte(b, nChar)
if m < 0 {
return dst, 0, errNeedMore
}
m++
n += m
if (m == 2 && b[0] == rChar) || m == 1 {
dst = append(dst, buf[:n]...)
return dst, n, nil
}
}
}
func (h *ResponseHeader) parseHeaders(buf []byte) (int, error) {
// 'identity' content-length by default
h.contentLength = -2
var s headerScanner
s.b = buf
s.disableNormalizing = h.disableNormalizing
var err error
var kv *argsKV
for s.next() {
if len(s.key) > 0 {
switch s.key[0] | 0x20 {
case 'c':
if caseInsensitiveCompare(s.key, strContentType) {
h.contentType = append(h.contentType[:0], s.value...)
continue
}
if caseInsensitiveCompare(s.key, strContentEncoding) {
h.contentEncoding = append(h.contentEncoding[:0], s.value...)
continue
}
if caseInsensitiveCompare(s.key, strContentLength) {
if h.contentLength != -1 {
if h.contentLength, err = parseContentLength(s.value); err != nil {
h.contentLength = -2
} else {
h.contentLengthBytes = append(h.contentLengthBytes[:0], s.value...)
}
}
continue
}
if caseInsensitiveCompare(s.key, strConnection) {
if bytes.Equal(s.value, strClose) {
h.connectionClose = true
} else {
h.connectionClose = false
h.h = appendArgBytes(h.h, s.key, s.value, argsHasValue)
}
continue
}
case 's':
if caseInsensitiveCompare(s.key, strServer) {
h.server = append(h.server[:0], s.value...)
continue
}
if caseInsensitiveCompare(s.key, strSetCookie) {
h.cookies, kv = allocArg(h.cookies)
kv.key = getCookieKey(kv.key, s.value)
kv.value = append(kv.value[:0], s.value...)
continue
}
case 't':
if caseInsensitiveCompare(s.key, strTransferEncoding) {
if len(s.value) > 0 && !bytes.Equal(s.value, strIdentity) {
h.contentLength = -1
h.h = setArgBytes(h.h, strTransferEncoding, strChunked, argsHasValue)
}
continue
}
if caseInsensitiveCompare(s.key, strTrailer) {
err = h.SetTrailerBytes(s.value)
continue
}
}
h.h = appendArgBytes(h.h, s.key, s.value, argsHasValue)
}
}
if s.err != nil {
h.connectionClose = true
return 0, s.err
}
if h.contentLength < 0 {
h.contentLengthBytes = h.contentLengthBytes[:0]
}
if h.contentLength == -2 && !h.ConnectionUpgrade() && !h.mustSkipContentLength() {
h.h = setArgBytes(h.h, strTransferEncoding, strIdentity, argsHasValue)
h.connectionClose = true
}
if h.noHTTP11 && !h.connectionClose {
// close connection for non-http/1.1 response unless 'Connection: keep-alive' is set.
v := peekArgBytes(h.h, strConnection)
h.connectionClose = !hasHeaderValue(v, strKeepAlive)
}
return len(buf) - len(s.b), err
}
func (h *RequestHeader) parseHeaders(buf []byte) (int, error) {
h.contentLength = -2
var s headerScanner
s.b = buf
s.disableNormalizing = h.disableNormalizing
var err error
for s.next() {
if len(s.key) > 0 {
// Spaces between the header key and colon are not allowed.
// See RFC 7230, Section 3.2.4.
if bytes.IndexByte(s.key, ' ') != -1 || bytes.IndexByte(s.key, '\t') != -1 {
err = fmt.Errorf("invalid header key %q", s.key)
continue
}
if h.disableSpecialHeader {
h.h = appendArgBytes(h.h, s.key, s.value, argsHasValue)
continue
}
switch s.key[0] | 0x20 {
case 'h':
if caseInsensitiveCompare(s.key, strHost) {
h.host = append(h.host[:0], s.value...)
continue
}
case 'u':
if caseInsensitiveCompare(s.key, strUserAgent) {
h.userAgent = append(h.userAgent[:0], s.value...)
continue
}
case 'c':
if caseInsensitiveCompare(s.key, strContentType) {
h.contentType = append(h.contentType[:0], s.value...)
continue
}
if caseInsensitiveCompare(s.key, strContentLength) {
if h.contentLength != -1 {
var nerr error
if h.contentLength, nerr = parseContentLength(s.value); nerr != nil {
if err == nil {
err = nerr
}
h.contentLength = -2
} else {
h.contentLengthBytes = append(h.contentLengthBytes[:0], s.value...)
}
}
continue
}
if caseInsensitiveCompare(s.key, strConnection) {
if bytes.Equal(s.value, strClose) {
h.connectionClose = true
} else {
h.connectionClose = false
h.h = appendArgBytes(h.h, s.key, s.value, argsHasValue)
}
continue
}
case 't':
if caseInsensitiveCompare(s.key, strTransferEncoding) {
if !bytes.Equal(s.value, strIdentity) {
h.contentLength = -1
h.h = setArgBytes(h.h, strTransferEncoding, strChunked, argsHasValue)
}
continue
}
if caseInsensitiveCompare(s.key, strTrailer) {
if nerr := h.SetTrailerBytes(s.value); nerr != nil {
if err == nil {
err = nerr
}
}
continue
}
}
}
h.h = appendArgBytes(h.h, s.key, s.value, argsHasValue)
}
if s.err != nil && err == nil {
err = s.err
}
if err != nil {
h.connectionClose = true
return 0, err
}
if h.contentLength < 0 {
h.contentLengthBytes = h.contentLengthBytes[:0]
}
if h.noHTTP11 && !h.connectionClose {
// close connection for non-http/1.1 request unless 'Connection: keep-alive' is set.
v := peekArgBytes(h.h, strConnection)
h.connectionClose = !hasHeaderValue(v, strKeepAlive)
}
return s.hLen, nil
}
func (h *RequestHeader) collectCookies() {
if h.cookiesCollected {
return
}
for i, n := 0, len(h.h); i < n; i++ {
kv := &h.h[i]
if caseInsensitiveCompare(kv.key, strCookie) {
h.cookies = parseRequestCookies(h.cookies, kv.value)
tmp := *kv
copy(h.h[i:], h.h[i+1:])
n--
i--
h.h[n] = tmp
h.h = h.h[:n]
}
}
h.cookiesCollected = true
}
var errNonNumericChars = errors.New("non-numeric chars found")
func parseContentLength(b []byte) (int, error) {
v, n, err := parseUintBuf(b)
if err != nil {
return -1, fmt.Errorf("cannot parse Content-Length: %w", err)
}
if n != len(b) {
return -1, fmt.Errorf("cannot parse Content-Length: %w", errNonNumericChars)
}
return v, nil
}
type headerScanner struct {
b []byte
key []byte
value []byte
err error
// hLen stores header subslice len
hLen int
disableNormalizing bool
// by checking whether the next line contains a colon or not to tell
// it's a header entry or a multi line value of current header entry.
// the side effect of this operation is that we know the index of the
// next colon and new line, so this can be used during next iteration,
// instead of find them again.
nextColon int
nextNewLine int
initialized bool
}
func (s *headerScanner) next() bool {
if !s.initialized {
s.nextColon = -1
s.nextNewLine = -1
s.initialized = true
}
bLen := len(s.b)
if bLen >= 2 && s.b[0] == rChar && s.b[1] == nChar {
s.b = s.b[2:]
s.hLen += 2
return false
}
if bLen >= 1 && s.b[0] == nChar {
s.b = s.b[1:]
s.hLen++
return false
}
var n int
if s.nextColon >= 0 {
n = s.nextColon
s.nextColon = -1
} else {
n = bytes.IndexByte(s.b, ':')
// There can't be a \n inside the header name, check for this.
x := bytes.IndexByte(s.b, nChar)
if x < 0 {
// A header name should always at some point be followed by a \n
// even if it's the one that terminates the header block.
s.err = errNeedMore
return false
}
if x < n {
// There was a \n before the :
s.err = errInvalidName
return false
}
}
if n < 0 {
s.err = errNeedMore
return false
}
s.key = s.b[:n]
normalizeHeaderKey(s.key, s.disableNormalizing)
n++
for len(s.b) > n && s.b[n] == ' ' {
n++
// the newline index is a relative index, and lines below trimmed `s.b` by `n`,
// so the relative newline index also shifted forward. it's safe to decrease
// to a minus value, it means it's invalid, and will find the newline again.
s.nextNewLine--
}
s.hLen += n
s.b = s.b[n:]
if s.nextNewLine >= 0 {
n = s.nextNewLine
s.nextNewLine = -1
} else {
n = bytes.IndexByte(s.b, nChar)
}
if n < 0 {
s.err = errNeedMore
return false
}
isMultiLineValue := false
for {
if n+1 >= len(s.b) {
break
}
if s.b[n+1] != ' ' && s.b[n+1] != '\t' {
break
}
d := bytes.IndexByte(s.b[n+1:], nChar)
if d <= 0 {
break
} else if d == 1 && s.b[n+1] == rChar {
break
}
e := n + d + 1
if c := bytes.IndexByte(s.b[n+1:e], ':'); c >= 0 {
s.nextColon = c
s.nextNewLine = d - c - 1
break
}
isMultiLineValue = true
n = e
}
if n >= len(s.b) {
s.err = errNeedMore
return false
}
oldB := s.b
s.value = s.b[:n]
s.hLen += n + 1
s.b = s.b[n+1:]
if n > 0 && s.value[n-1] == rChar {
n--
}
for n > 0 && s.value[n-1] == ' ' {
n--
}
s.value = s.value[:n]
if isMultiLineValue {
s.value, s.b, s.hLen = normalizeHeaderValue(s.value, oldB, s.hLen)
}
return true
}
type headerValueScanner struct {
b []byte
value []byte
}
func (s *headerValueScanner) next() bool {
b := s.b
if len(b) == 0 {
return false
}
n := bytes.IndexByte(b, ',')
if n < 0 {
s.value = stripSpace(b)
s.b = b[len(b):]
return true
}
s.value = stripSpace(b[:n])
s.b = b[n+1:]
return true
}
func stripSpace(b []byte) []byte {
for len(b) > 0 && b[0] == ' ' {
b = b[1:]
}
for len(b) > 0 && b[len(b)-1] == ' ' {
b = b[:len(b)-1]
}
return b
}
func hasHeaderValue(s, value []byte) bool {
var vs headerValueScanner
vs.b = s
for vs.next() {
if caseInsensitiveCompare(vs.value, value) {
return true
}
}
return false
}
func nextLine(b []byte) ([]byte, []byte, error) {
nNext := bytes.IndexByte(b, nChar)
if nNext < 0 {
return nil, nil, errNeedMore
}
n := nNext
if n > 0 && b[n-1] == rChar {
n--
}
return b[:n], b[nNext+1:], nil
}
func initHeaderKV(kv *argsKV, key, value string, disableNormalizing bool) {
kv.key = getHeaderKeyBytes(kv, key, disableNormalizing)
// https://tools.ietf.org/html/rfc7230#section-3.2.4
kv.value = append(kv.value[:0], value...)
kv.value = removeNewLines(kv.value)
}
func getHeaderKeyBytes(kv *argsKV, key string, disableNormalizing bool) []byte {
kv.key = append(kv.key[:0], key...)
normalizeHeaderKey(kv.key, disableNormalizing)
return kv.key
}
func normalizeHeaderValue(ov, ob []byte, headerLength int) (nv, nb []byte, nhl int) {
nv = ov
length := len(ov)
if length <= 0 {
return
}
write := 0
shrunk := 0
lineStart := false
for read := 0; read < length; read++ {
c := ov[read]
switch {
case c == rChar || c == nChar:
shrunk++
if c == nChar {
lineStart = true
}
continue
case lineStart && c == '\t':
c = ' '
default:
lineStart = false
}
nv[write] = c
write++
}
nv = nv[:write]
copy(ob[write:], ob[write+shrunk:])
// Check if we need to skip \r\n or just \n
skip := 0
if ob[write] == rChar {
if ob[write+1] == nChar {
skip += 2
} else {
skip++
}
} else if ob[write] == nChar {
skip++
}
nb = ob[write+skip : len(ob)-shrunk]
nhl = headerLength - shrunk
return
}
func normalizeHeaderKey(b []byte, disableNormalizing bool) {
if disableNormalizing {
return
}
n := len(b)
if n == 0 {
return
}
b[0] = toUpperTable[b[0]]
for i := 1; i < n; i++ {
p := &b[i]
if *p == '-' {
i++
if i < n {
b[i] = toUpperTable[b[i]]
}
continue
}
*p = toLowerTable[*p]
}
}
// removeNewLines will replace `\r` and `\n` with an empty space
func removeNewLines(raw []byte) []byte {
// check if a `\r` is present and save the position.
// if no `\r` is found, check if a `\n` is present.
foundR := bytes.IndexByte(raw, rChar)
foundN := bytes.IndexByte(raw, nChar)
start := 0
switch {
case foundN != -1:
if foundR > foundN {
start = foundN
} else if foundR != -1 {
start = foundR
}
case foundR != -1:
start = foundR
default:
return raw
}
for i := start; i < len(raw); i++ {
switch raw[i] {
case rChar, nChar:
raw[i] = ' '
default:
continue
}
}
return raw
}
// AppendNormalizedHeaderKey appends normalized header key (name) to dst
// and returns the resulting dst.
//
// Normalized header key starts with uppercase letter. The first letters
// after dashes are also uppercased. All the other letters are lowercased.
// Examples:
//
// - coNTENT-TYPe -> Content-Type
// - HOST -> Host
// - foo-bar-baz -> Foo-Bar-Baz
func AppendNormalizedHeaderKey(dst []byte, key string) []byte {
dst = append(dst, key...)
normalizeHeaderKey(dst[len(dst)-len(key):], false)
return dst
}
// AppendNormalizedHeaderKeyBytes appends normalized header key (name) to dst
// and returns the resulting dst.
//
// Normalized header key starts with uppercase letter. The first letters
// after dashes are also uppercased. All the other letters are lowercased.
// Examples:
//
// - coNTENT-TYPe -> Content-Type
// - HOST -> Host
// - foo-bar-baz -> Foo-Bar-Baz
func AppendNormalizedHeaderKeyBytes(dst, key []byte) []byte {
return AppendNormalizedHeaderKey(dst, b2s(key))
}
func appendArgsKeyBytes(dst []byte, args []argsKV, sep []byte) []byte {
for i, n := 0, len(args); i < n; i++ {
kv := &args[i]
dst = append(dst, kv.key...)
if i+1 < n {
dst = append(dst, sep...)
}
}
return dst
}
var (
errNeedMore = errors.New("need more data: cannot find trailing lf")
errInvalidName = errors.New("invalid header name")
errSmallBuffer = errors.New("small read buffer. Increase ReadBufferSize")
)
// ErrNothingRead is returned when a keep-alive connection is closed,
// either because the remote closed it or because of a read timeout.
type ErrNothingRead struct {
error
}
// ErrSmallBuffer is returned when the provided buffer size is too small
// for reading request and/or response headers.
//
// ReadBufferSize value from Server or clients should reduce the number
// of such errors.
type ErrSmallBuffer struct {
error
}
func mustPeekBuffered(r *bufio.Reader) []byte {
buf, err := r.Peek(r.Buffered())
if len(buf) == 0 || err != nil {
panic(fmt.Sprintf("bufio.Reader.Peek() returned unexpected data (%q, %v)", buf, err))
}
return buf
}
func mustDiscard(r *bufio.Reader, n int) {
if _, err := r.Discard(n); err != nil {
panic(fmt.Sprintf("bufio.Reader.Discard(%d) failed: %v", n, err))
}
}