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Response.ContentEncoding(): store as field and avoid using Header.Set…
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…Canonical() (#1311)

* Response.ContentEncoding(): store as field

The CE is not so often used for plain APIs responses and even not so often used for static files and on the fly compression.
But still it should be checked each time.
Also having a dedicated field getter and setter simplifies code

* header.go Use shorter Response.setNonSpecial() and Request.setNonSpecial() methods instead of SetCanonical()

The change should improve performance because the setSpecialHeader() call is omitted.
As a downside on adding a new basic header field all putHeader() must be replaced with a direct getter and setter.
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@stokito
stokito authored Jun 5, 2022
1 parent de18824 commit c9f43ea
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Showing 9 changed files with 146 additions and 53 deletions.
6 changes: 3 additions & 3 deletions brotli_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -120,7 +120,7 @@ func TestCompressHandlerBrotliLevel(t *testing.T) {
if err := resp.Read(br); err != nil {
t.Fatalf("unexpected error: %v", err)
}
ce := resp.Header.Peek(HeaderContentEncoding)
ce := resp.Header.ContentEncoding()
if string(ce) != "" {
t.Fatalf("unexpected Content-Encoding: %q. Expecting %q", ce, "")
}
Expand All @@ -140,7 +140,7 @@ func TestCompressHandlerBrotliLevel(t *testing.T) {
if err := resp.Read(br); err != nil {
t.Fatalf("unexpected error: %v", err)
}
ce = resp.Header.Peek(HeaderContentEncoding)
ce = resp.Header.ContentEncoding()
if string(ce) != "gzip" {
t.Fatalf("unexpected Content-Encoding: %q. Expecting %q", ce, "gzip")
}
Expand All @@ -163,7 +163,7 @@ func TestCompressHandlerBrotliLevel(t *testing.T) {
if err := resp.Read(br); err != nil {
t.Fatalf("unexpected error: %v", err)
}
ce = resp.Header.Peek(HeaderContentEncoding)
ce = resp.Header.ContentEncoding()
if string(ce) != "br" {
t.Fatalf("unexpected Content-Encoding: %q. Expecting %q", ce, "br")
}
Expand Down
8 changes: 4 additions & 4 deletions fs.go
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Original file line number Diff line number Diff line change
Expand Up @@ -898,16 +898,16 @@ func (h *fsHandler) handleRequest(ctx *RequestCtx) {
hdr := &ctx.Response.Header
if ff.compressed {
if fileEncoding == "br" {
hdr.SetCanonical(strContentEncoding, strBr)
hdr.SetContentEncodingBytes(strBr)
} else if fileEncoding == "gzip" {
hdr.SetCanonical(strContentEncoding, strGzip)
hdr.SetContentEncodingBytes(strGzip)
}
}

statusCode := StatusOK
contentLength := ff.contentLength
if h.acceptByteRange {
hdr.SetCanonical(strAcceptRanges, strBytes)
hdr.setNonSpecial(strAcceptRanges, strBytes)
if len(byteRange) > 0 {
startPos, endPos, err := ParseByteRange(byteRange, contentLength)
if err != nil {
Expand All @@ -930,7 +930,7 @@ func (h *fsHandler) handleRequest(ctx *RequestCtx) {
}
}

hdr.SetCanonical(strLastModified, ff.lastModifiedStr)
hdr.setNonSpecial(strLastModified, ff.lastModifiedStr)
if !ctx.IsHead() {
ctx.SetBodyStream(r, contentLength)
} else {
Expand Down
14 changes: 7 additions & 7 deletions fs_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -133,7 +133,7 @@ func TestServeFileHead(t *testing.T) {
t.Fatalf("unexpected error: %v", err)
}

ce := resp.Header.Peek(HeaderContentEncoding)
ce := resp.Header.ContentEncoding()
if len(ce) > 0 {
t.Fatalf("Unexpected 'Content-Encoding' %q", ce)
}
Expand Down Expand Up @@ -225,7 +225,7 @@ func TestServeFileCompressed(t *testing.T) {
t.Fatalf("unexpected error: %v", err)
}

ce := resp.Header.Peek(HeaderContentEncoding)
ce := resp.Header.ContentEncoding()
if string(ce) != "gzip" {
t.Fatalf("Unexpected 'Content-Encoding' %q. Expecting %q", ce, "gzip")
}
Expand Down Expand Up @@ -254,7 +254,7 @@ func TestServeFileCompressed(t *testing.T) {
t.Fatalf("unexpected error: %v", err)
}

ce = resp.Header.Peek(HeaderContentEncoding)
ce = resp.Header.ContentEncoding()
if string(ce) != "br" {
t.Fatalf("Unexpected 'Content-Encoding' %q. Expecting %q", ce, "br")
}
Expand Down Expand Up @@ -290,7 +290,7 @@ func TestServeFileUncompressed(t *testing.T) {
t.Fatalf("unexpected error: %v", err)
}

ce := resp.Header.Peek(HeaderContentEncoding)
ce := resp.Header.ContentEncoding()
if len(ce) > 0 {
t.Fatalf("Unexpected 'Content-Encoding' %q", ce)
}
Expand Down Expand Up @@ -567,7 +567,7 @@ func testFSCompress(t *testing.T, h RequestHandler, filePath string) {
if resp.StatusCode() != StatusOK {
t.Errorf("unexpected status code: %d. Expecting %d. filePath=%q", resp.StatusCode(), StatusOK, filePath)
}
ce := resp.Header.Peek(HeaderContentEncoding)
ce := resp.Header.ContentEncoding()
if string(ce) != "" {
t.Errorf("unexpected content-encoding %q. Expecting empty string. filePath=%q", ce, filePath)
}
Expand All @@ -586,7 +586,7 @@ func testFSCompress(t *testing.T, h RequestHandler, filePath string) {
if resp.StatusCode() != StatusOK {
t.Errorf("unexpected status code: %d. Expecting %d. filePath=%q", resp.StatusCode(), StatusOK, filePath)
}
ce = resp.Header.Peek(HeaderContentEncoding)
ce = resp.Header.ContentEncoding()
if string(ce) != "gzip" {
t.Errorf("unexpected content-encoding %q. Expecting %q. filePath=%q", ce, "gzip", filePath)
}
Expand All @@ -611,7 +611,7 @@ func testFSCompress(t *testing.T, h RequestHandler, filePath string) {
if resp.StatusCode() != StatusOK {
t.Errorf("unexpected status code: %d. Expecting %d. filePath=%q", resp.StatusCode(), StatusOK, filePath)
}
ce = resp.Header.Peek(HeaderContentEncoding)
ce = resp.Header.ContentEncoding()
if string(ce) != "br" {
t.Errorf("unexpected content-encoding %q. Expecting %q. filePath=%q", ce, "br", filePath)
}
Expand Down
69 changes: 57 additions & 12 deletions header.go
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Original file line number Diff line number Diff line change
Expand Up @@ -39,8 +39,9 @@ type ResponseHeader struct {
contentLengthBytes []byte
secureErrorLogMessage bool

contentType []byte
server []byte
contentType []byte
contentEncoding []byte
server []byte

h []argsKV
trailer []argsKV
Expand Down Expand Up @@ -103,7 +104,7 @@ func (h *ResponseHeader) SetContentRange(startPos, endPos, contentLength int) {
b = AppendUint(b, contentLength)
h.bufKV.value = b

h.SetCanonical(strContentRange, h.bufKV.value)
h.setNonSpecial(strContentRange, h.bufKV.value)
}

// SetByteRange sets 'Range: bytes=startPos-endPos' header.
Expand All @@ -125,7 +126,7 @@ func (h *RequestHeader) SetByteRange(startPos, endPos int) {
}
h.bufKV.value = b

h.SetCanonical(strRange, h.bufKV.value)
h.setNonSpecial(strRange, h.bufKV.value)
}

// StatusCode returns response status code.
Expand Down Expand Up @@ -167,7 +168,7 @@ func (h *ResponseHeader) SetProtocol(protocol []byte) {
// 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.SetCanonical(strLastModified, h.bufKV.value)
h.setNonSpecial(strLastModified, h.bufKV.value)
}

// ConnectionClose returns true if 'Connection: close' header is set.
Expand Down Expand Up @@ -325,6 +326,21 @@ 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...)
}

// Server returns Server header value.
func (h *ResponseHeader) Server() []byte {
return h.server
Expand Down Expand Up @@ -580,7 +596,7 @@ func (h *RequestHeader) SetReferer(referer string) {

// SetRefererBytes sets Referer header value.
func (h *RequestHeader) SetRefererBytes(referer []byte) {
h.SetCanonical(strReferer, referer)
h.setNonSpecial(strReferer, referer)
}

// Method returns HTTP request method.
Expand Down Expand Up @@ -937,6 +953,7 @@ func (h *ResponseHeader) resetSkipNormalize() {
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]
Expand Down Expand Up @@ -994,6 +1011,7 @@ func (h *ResponseHeader) CopyTo(dst *ResponseHeader) {
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)
Expand Down Expand Up @@ -1035,6 +1053,10 @@ func (h *ResponseHeader) VisitAll(f func(key, value []byte)) {
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)
Expand Down Expand Up @@ -1158,6 +1180,8 @@ 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:
Expand Down Expand Up @@ -1224,12 +1248,15 @@ func (h *ResponseHeader) setSpecialHeader(key, value []byte) bool {
h.contentLengthBytes = append(h.contentLengthBytes[:0], value...)
}
return true
} else if caseInsensitiveCompare(strContentEncoding, key) {
h.SetContentEncodingBytes(value)
return true
} else if caseInsensitiveCompare(strConnection, key) {
if bytes.Equal(strClose, value) {
h.SetConnectionClose()
} else {
h.ResetConnectionClose()
h.h = setArgBytes(h.h, key, value, argsHasValue)
h.setNonSpecial(key, value)
}
return true
}
Expand Down Expand Up @@ -1262,6 +1289,11 @@ func (h *ResponseHeader) setSpecialHeader(key, value []byte) bool {
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 {
Expand All @@ -1284,7 +1316,7 @@ func (h *RequestHeader) setSpecialHeader(key, value []byte) bool {
h.SetConnectionClose()
} else {
h.ResetConnectionClose()
h.h = setArgBytes(h.h, key, value, argsHasValue)
h.setNonSpecial(key, value)
}
return true
} else if caseInsensitiveCompare(strCookie, key) {
Expand Down Expand Up @@ -1315,6 +1347,11 @@ func (h *RequestHeader) setSpecialHeader(key, value []byte) bool {
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.
Expand Down Expand Up @@ -1434,8 +1471,7 @@ func (h *ResponseHeader) SetCanonical(key, value []byte) {
if h.setSpecialHeader(key, value) {
return
}

h.h = setArgBytes(h.h, key, value, argsHasValue)
h.setNonSpecial(key, value)
}

// SetCookie sets the given response cookie.
Expand Down Expand Up @@ -1646,8 +1682,7 @@ func (h *RequestHeader) SetCanonical(key, value []byte) {
if h.setSpecialHeader(key, value) {
return
}

h.h = setArgBytes(h.h, key, value, argsHasValue)
h.setNonSpecial(key, value)
}

// Peek returns header value for the given key.
Expand Down Expand Up @@ -1696,6 +1731,8 @@ 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:
Expand Down Expand Up @@ -2151,6 +2188,10 @@ func (h *ResponseHeader) AppendBytes(dst []byte) []byte {
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)
Expand Down Expand Up @@ -2616,6 +2657,10 @@ func (h *ResponseHeader) parseHeaders(buf []byte) (int, error) {
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 {
Expand Down
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