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filter.go
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filter.go
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package jwtauthn
import (
"context"
"mosn.io/api"
"mosn.io/mosn/pkg/variable"
"mosn.io/pkg/buffer"
"mosn.io/mosn/pkg/log"
"mosn.io/mosn/pkg/types"
)
type filter struct {
config FilterConfig
handler api.StreamReceiverFilterHandler
}
func newJwtAuthnFilter(config FilterConfig) *filter {
return &filter{
config: config,
}
}
func (f *filter) OnReceive(ctx context.Context, headers api.HeaderMap, buf buffer.IoBuffer, trailers api.HeaderMap) api.StreamFilterStatus {
if log.DefaultLogger.GetLogLevel() >= log.DEBUG {
log.DefaultLogger.Debugf("call jwt_authn filter")
}
// TODO(huangrh): bypass
requestArg, err := variable.GetString(ctx, types.VarHttpRequestArg)
if err != nil {
log.DefaultLogger.Errorf("[jwt_authn filter] get query parameter: %v", err)
return api.StreamFilterContinue
}
requestPath, err := variable.GetString(ctx, types.VarHttpRequestPath)
if err != nil {
log.DefaultLogger.Errorf("[jwt_authn filter] get path: %v", err)
return api.StreamFilterStop
}
// Verify the JWT token
verifier := f.config.FindVerifier(headers, requestArg, requestPath)
if verifier == nil {
return api.StreamFilterContinue
}
if err := verifier.Verify(headers, requestPath); err != nil {
f.handler.SendHijackReply(401, headers)
return api.StreamFilterStop
}
return api.StreamFilterContinue
}
func (f *filter) SetReceiveFilterHandler(handler api.StreamReceiverFilterHandler) {
f.handler = handler
}
func (f *filter) OnDestroy() {}