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reverseproxy: Ignore RFC 1521 params in Content-Type header (#3758)

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Without this change, a Content-Type header like "text/event-stream;charset=utf-8"
would not trigger the immediate flushing.

Fixes #3765
This commit is contained in:
Christian Flach 2020-10-01 20:15:45 +02:00 committed by GitHub
parent dadfe1933b
commit fdfdc03339
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 2 deletions
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6
modules/caddyhttp/reverseproxy/streaming.go
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@ -21,6 +21,7 @@ package reverseproxy
import (
"context"
"io"
"mime"
"net/http"
"sync"
"time"
@ -88,11 +89,12 @@ func (h Handler) handleUpgradeResponse(rw http.ResponseWriter, req *http.Request
// flushInterval returns the p.FlushInterval value, conditionally
// overriding its value for a specific request/response.
func (h Handler) flushInterval(req *http.Request, res *http.Response) time.Duration {
resCT := res.Header.Get("Content-Type")
resCTHeader := res.Header.Get("Content-Type")
resCT, _, err := mime.ParseMediaType(resCTHeader)
// For Server-Sent Events responses, flush immediately.
// The MIME type is defined in https://www.w3.org/TR/eventsource/#text-event-stream
if resCT == "text/event-stream" {
if err == nil && resCT == "text/event-stream" {
return -1 // negative means immediately
}