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header_matcher.go
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/
header_matcher.go
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package jwtauthn
import (
"strings"
routev3 "github.com/envoyproxy/go-control-plane/envoy/config/route/v3"
"mosn.io/api"
)
func matchHeaders(requestHeaders api.HeaderMap, configHeaders []*routev3.HeaderMatcher) bool {
// No headers to match is considered a match.
if len(configHeaders) == 0 {
return true
}
if requestHeaders == nil {
return false
}
for _, configHeader := range configHeaders {
if !matchHeader(requestHeaders, configHeader) {
return false
}
}
return true
}
func matchHeader(requestHeaders api.HeaderMap, configHeader *routev3.HeaderMatcher) bool {
rHeaderValue, exists := requestHeaders.Get(configHeader.GetName())
if !exists {
return configHeader.InvertMatch && configHeader.GetPresentMatch()
}
match := false
switch headerMatcher := configHeader.HeaderMatchSpecifier.(type) {
case *routev3.HeaderMatcher_ExactMatch:
match = headerMatcher.ExactMatch == "" || headerMatcher.ExactMatch == rHeaderValue
case *routev3.HeaderMatcher_SafeRegexMatch:
// TODO(huangrh):
case *routev3.HeaderMatcher_RangeMatch:
// TODO(huangrh):
case *routev3.HeaderMatcher_PresentMatch:
match = true
case *routev3.HeaderMatcher_PrefixMatch:
match = strings.HasPrefix(rHeaderValue, headerMatcher.PrefixMatch)
case *routev3.HeaderMatcher_SuffixMatch:
match = strings.HasSuffix(rHeaderValue, headerMatcher.SuffixMatch)
}
return match != configHeader.InvertMatch
}