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caddyhttp: Allow matching Transfer-Encoding, add to access logs (#6629)

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* caddyhttp: Allow matching Transfer-Encoding

* Log transfer_encoding on the request

---------

Co-authored-by: Matt Holt <mholt@users.noreply.github.com>
This commit is contained in:
Francis Lavoie 2024-12-20 13:16:34 -05:00 committed by GitHub
parent ed1c594cdb
commit c216cf551d
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GPG key ID: B5690EEEBB952194
3 changed files with 15 additions and 8 deletions
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3
modules/caddyhttp/marshalers.go
View file

@ -51,6 +51,9 @@ func (r LoggableHTTPRequest) MarshalLogObject(enc zapcore.ObjectEncoder) error {
Header: r.Header,
ShouldLogCredentials: r.ShouldLogCredentials,
})
if r.TransferEncoding != nil {
enc.AddArray("transfer_encoding", LoggableStringArray(r.TransferEncoding))
}
if r.TLS != nil {
enc.AddObject("tls", LoggableTLSConnState(*r.TLS))
}

18
modules/caddyhttp/matchers.go
View file

@ -978,7 +978,7 @@ func (m MatchHeader) Match(r *http.Request) bool {
// MatchWithError returns true if r matches m.
func (m MatchHeader) MatchWithError(r *http.Request) (bool, error) {
repl := r.Context().Value(caddy.ReplacerCtxKey).(*caddy.Replacer)
return matchHeaders(r.Header, http.Header(m), r.Host, repl), nil
return matchHeaders(r.Header, http.Header(m), r.Host, r.TransferEncoding, repl), nil
}
// CELLibrary produces options that expose this matcher for use in CEL
@ -1004,22 +1004,26 @@ func (MatchHeader) CELLibrary(_ caddy.Context) (cel.Library, error) {
}
// getHeaderFieldVals returns the field values for the given fieldName from input.
// The host parameter should be obtained from the http.Request.Host field since
// net/http removes it from the header map.
func getHeaderFieldVals(input http.Header, fieldName, host string) []string {
// The host parameter should be obtained from the http.Request.Host field, and the
// transferEncoding from http.Request.TransferEncoding, since net/http removes them
// from the header map.
func getHeaderFieldVals(input http.Header, fieldName, host string, transferEncoding []string) []string {
fieldName = textproto.CanonicalMIMEHeaderKey(fieldName)
if fieldName == "Host" && host != "" {
return []string{host}
}
if fieldName == "Transfer-Encoding" && input[fieldName] == nil {
return transferEncoding
}
return input[fieldName]
}
// matchHeaders returns true if input matches the criteria in against without regex.
// The host parameter should be obtained from the http.Request.Host field since
// net/http removes it from the header map.
func matchHeaders(input, against http.Header, host string, repl *caddy.Replacer) bool {
func matchHeaders(input, against http.Header, host string, transferEncoding []string, repl *caddy.Replacer) bool {
for field, allowedFieldVals := range against {
actualFieldVals := getHeaderFieldVals(input, field, host)
actualFieldVals := getHeaderFieldVals(input, field, host, transferEncoding)
if allowedFieldVals != nil && len(allowedFieldVals) == 0 && actualFieldVals != nil {
// a non-nil but empty list of allowed values means
// match if the header field exists at all
@ -1119,7 +1123,7 @@ func (m MatchHeaderRE) Match(r *http.Request) bool {
// MatchWithError returns true if r matches m.
func (m MatchHeaderRE) MatchWithError(r *http.Request) (bool, error) {
for field, rm := range m {
actualFieldVals := getHeaderFieldVals(r.Header, field, r.Host)
actualFieldVals := getHeaderFieldVals(r.Header, field, r.Host, r.TransferEncoding)
match := false
fieldVal:
for _, actualFieldVal := range actualFieldVals {

2
modules/caddyhttp/responsematchers.go
View file

@ -41,7 +41,7 @@ func (rm ResponseMatcher) Match(statusCode int, hdr http.Header) bool {
if !rm.matchStatusCode(statusCode) {
return false
}
return matchHeaders(hdr, rm.Headers, "", nil)
return matchHeaders(hdr, rm.Headers, "", []string{}, nil)
}
func (rm ResponseMatcher) matchStatusCode(statusCode int) bool {