3e3f802f2b
The built in go http.Fileserver handles If-Modified-Since in the header by comparing it with the last modified date on the file/directory. Since the file is unaltered when we switch to a new container, that results in 304s when trying to fetch data.json, so the browser doesn't fetch the new picture after doing a rolling update. Separate issue, the Dockerfile ADD command was being interpreted as `copy html/data.json into a directory called 'html/kitten.jpg '`, instead of the `copy these 2 files into root`. Changed to separate commands using COPY, per recommended dockerfile practices.
52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// A tiny web server that serves a static file.
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package main
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import (
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"flag"
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"fmt"
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"log"
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"net/http"
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)
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var (
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port = flag.Int("port", 80, "Port number.")
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)
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func main() {
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flag.Parse()
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fs := http.StripPrefix("/", http.FileServer(http.Dir("/")))
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Cache-Control", "private")
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// Needed for local proxy to Kubernetes API server to work.
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Access-Control-Allow-Credentials", "true")
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w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
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w.Header().Set("Access-Control-Allow-Headers", "DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,Cache-Control,Content-Type")
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// Disable If-Modified-Since so update-demo isn't broken by 304s
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r.Header.Del("If-Modified-Since")
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fs.ServeHTTP(w, r)
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})
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go log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", *port), nil))
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select {}
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}
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