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bcaa240695
## What changed? <!-- Describe what has changed in this PR --> Propagating the Nexus response header `Temporal-Nexus-Failure-Source` to the outbound queue executor. ## Why? <!-- Tell your future self why have you made these changes --> This header is included as a label on the outbound queue metrics so that we can exclude expected user errors from our alerts. ## How did you test it? <!-- How have you verified this change? Tested locally? Added a unit test? Checked in staging env? --> ## Potential risks <!-- Assuming the worst case, what can be broken when deploying this change to production? --> ## Documentation <!-- Have you made sure this change doesn't falsify anything currently stated in `docs/`? If significant new behavior is added, have you described that in `docs/`? --> ## Is hotfix candidate? <!-- Is this PR a hotfix candidate or does it require a notification to be sent to the broader community? (Yes/No) -->
67 lines
2.2 KiB
Go
67 lines
2.2 KiB
Go
// The MIT License
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//
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// Copyright (c) 2024 Temporal Technologies Inc. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package frontend
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import (
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"net/http"
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)
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// nexusHTTPResponseWriter is a wrapper for http.ResponseWriter that appends headers set on a nexusContext
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// before writing any response.
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type nexusHTTPResponseWriter struct {
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writer http.ResponseWriter
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nc *nexusContext
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}
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func newNexusHTTPResponseWriter(writer http.ResponseWriter, nc *nexusContext) http.ResponseWriter {
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return &nexusHTTPResponseWriter{
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writer: writer,
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nc: nc,
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}
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}
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func (w *nexusHTTPResponseWriter) Header() http.Header {
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return w.writer.Header()
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}
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func (w *nexusHTTPResponseWriter) Write(data []byte) (int, error) {
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return w.writer.Write(data)
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}
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func (w *nexusHTTPResponseWriter) WriteHeader(statusCode int) {
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w.nc.responseHeadersMutex.Lock()
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headersCopy := make(map[string]string, len(w.nc.responseHeaders))
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for k, v := range w.nc.responseHeaders {
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headersCopy[k] = v
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}
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w.nc.responseHeadersMutex.Unlock()
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h := w.writer.Header()
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for key, val := range headersCopy {
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if val != "" {
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h.Set(key, val)
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}
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}
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w.writer.WriteHeader(statusCode)
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}
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