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Add Pusher() function for support http2 server push (#1273)

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gin already support http2, while previously not support server push.
Add Pusher() function to extend the ResponseWriter interface.

```golang
// get http.Pusher
 if pusher := c.Writer.Pusher(); pusher != nil {
     // use pusher.Push() to do server push
}
```
<img width="881" alt="screen shot 2018-03-07 at 11 20 49 pm" src="https://user-images.githubusercontent.com/16014993/37100619-680c00c6-225e-11e8-9352-76ec3bd62894.png">
This commit is contained in:
htobenothing
2018-06-21 09:53:52 +08:00
committed by Bo-Yi Wu
parent 87d536c001
commit bf85b32c1d
9 changed files with 177 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
examples/http-pusher/assets/app.js Normal file
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@ -0,0 +1 @@
console.log("http2 pusher");

41
examples/http-pusher/main.go Normal file
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@ -0,0 +1,41 @@
package main
import (
"html/template"
"log"
"github.com/gin-gonic/gin"
)
var html = template.Must(template.New("https").Parse(`
<html>
<head>
<title>Https Test</title>
<script src="/assets/app.js"></script>
</head>
<body>
<h1 style="color:red;">Welcome, Ginner!</h1>
</body>
</html>
`))
func main() {
r := gin.Default()
r.Static("/assets", "./assets")
r.SetHTMLTemplate(html)
r.GET("/", func(c *gin.Context) {
if pusher := c.Writer.Pusher(); pusher != nil {
// use pusher.Push() to do server push
if err := pusher.Push("/assets/app.js", nil); err != nil {
log.Printf("Failed to push: %v", err)
}
}
c.HTML(200, "https", gin.H{
"status": "success",
})
})
// Listen and Server in https://127.0.0.1:8080
r.RunTLS(":8080", "./testdata/server.pem", "./testdata/server.key")
}

15
examples/http-pusher/testdata/ca.pem vendored Normal file
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@ -0,0 +1,15 @@
-----BEGIN CERTIFICATE-----
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Dfcog5wrJytaQ6UA0wE=
-----END CERTIFICATE-----

16
examples/http-pusher/testdata/server.key vendored Normal file
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@ -0,0 +1,16 @@
-----BEGIN PRIVATE KEY-----
MIICdQIBADANBgkqhkiG9w0BAQEFAASCAl8wggJbAgEAAoGBAOHDFScoLCVJpYDD
M4HYtIdV6Ake/sMNaaKdODjDMsux/4tDydlumN+fm+AjPEK5GHhGn1BgzkWF+slf
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F98XJ7tIFfJq
-----END PRIVATE KEY-----

16
examples/http-pusher/testdata/server.pem vendored Normal file
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@ -0,0 +1,16 @@
-----BEGIN CERTIFICATE-----
MIICnDCCAgWgAwIBAgIBBzANBgkqhkiG9w0BAQsFADBWMQswCQYDVQQGEwJBVTET
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-----END CERTIFICATE-----