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rakyll/main.go Secret

Last active February 15, 2026 01:11
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main.go
package main
import (
"fmt"
"log"
"net/http"
)
const mainJS = `console.log("hello world");`
const indexHTML = `<html>
<head>
<title>Hello</title>
<script src="/main.js"></script>
</head>
<body>
</body>
</html>
`
func main() {
http.HandleFunc("/main.js", func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, mainJS)
})
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path != "/" {
http.NotFound(w, r)
return
}
pusher, ok := w.(http.Pusher)
if ok { // Push is supported. Try pushing rather than waiting for the browser.
if err := pusher.Push("/main.js", nil); err != nil {
log.Printf("Failed to push: %v", err)
}
}
fmt.Fprintf(w, indexHTML)
})
// Run crypto/tls/generate_cert.go to generate cert.pem and key.pem.
// See https://golang.org/src/crypto/tls/generate_cert.go
log.Fatal(http.ListenAndServeTLS(":7072", "cert.pem", "key.pem", nil))
}
@HyeJong

HyeJong commented Nov 30, 2016

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Thanks a lot!

@vsouza

vsouza commented Dec 13, 2016

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thanks!

@peeyushsrj

peeyushsrj commented Feb 25, 2017

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Thanks!

@dreambo8563

dreambo8563 commented Mar 30, 2018

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I run the code locally, but I didn't see "push" in my console

@m90

m90 commented Jun 18, 2018 •
edited
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As of today (18.06.2018), this does not seem to work in Chrome (v67) when it does work in Firefox (v60).

Strangely the .(http.Pusher) assertion succeeds and the .Push calls don't return errors, but Chrome will simply request each resource on a new request. Firefox only performs a single request.

Strangely https://http2.golang.org/serverpush still seems to work in all browsers.

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