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reverseproxy: Logging for streaming and upgrades (#3689)

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* reverseproxy: Enable error logging for connection upgrades

* reverseproxy: Change some of the error levels, unsugar

* Use unsugared log in one spot

Co-authored-by: Matthew Holt <mholt@users.noreply.github.com>
This commit is contained in:
Francis Lavoie 2020-11-20 16:24:58 -05:00 committed by GitHub
parent 6e0849d4c2
commit 96058538f0
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 7 deletions
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15
modules/caddyhttp/reverseproxy/streaming.go
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@ -33,8 +33,9 @@ func (h Handler) handleUpgradeResponse(rw http.ResponseWriter, req *http.Request
reqUpType := upgradeType(req.Header)
resUpType := upgradeType(res.Header)
if reqUpType != resUpType {
// TODO: figure out our own error handling
// p.getErrorHandler()(rw, req, fmt.Errorf("backend tried to switch protocol %q when %q was requested", resUpType, reqUpType))
h.logger.Debug("backend tried to switch to unexpected protocol via Upgrade header",
zap.String("backend_upgrade", resUpType),
zap.String("requested_upgrade", reqUpType))
return
}
@ -42,12 +43,12 @@ func (h Handler) handleUpgradeResponse(rw http.ResponseWriter, req *http.Request
hj, ok := rw.(http.Hijacker)
if !ok {
// p.getErrorHandler()(rw, req, fmt.Errorf("can't switch protocols using non-Hijacker ResponseWriter type %T", rw))
h.logger.Sugar().Errorf("can't switch protocols using non-Hijacker ResponseWriter type %T", rw)
return
}
backConn, ok := res.Body.(io.ReadWriteCloser)
if !ok {
// p.getErrorHandler()(rw, req, fmt.Errorf("internal error: 101 switching protocols response with non-writable body"))
h.logger.Error("internal error: 101 switching protocols response with non-writable body")
return
}
@ -66,17 +67,17 @@ func (h Handler) handleUpgradeResponse(rw http.ResponseWriter, req *http.Request
conn, brw, err := hj.Hijack()
if err != nil {
// p.getErrorHandler()(rw, req, fmt.Errorf("Hijack failed on protocol switch: %v", err))
h.logger.Error("Hijack failed on protocol switch", zap.Error(err))
return
}
defer conn.Close()
res.Body = nil // so res.Write only writes the headers; we have res.Body in backConn above
if err := res.Write(brw); err != nil {
// p.getErrorHandler()(rw, req, fmt.Errorf("response write: %v", err))
h.logger.Debug("response write", zap.Error(err))
return
}
if err := brw.Flush(); err != nil {
// p.getErrorHandler()(rw, req, fmt.Errorf("response flush: %v", err))
h.logger.Debug("response flush", zap.Error(err))
return
}
errc := make(chan error, 1)