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Add Pusher() function for support http2 server push (#1273)
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">
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console.log("http2 pusher"); |
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package main | ||
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import ( | ||
"html/template" | ||
"log" | ||
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"github.com/gin-gonic/gin" | ||
) | ||
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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> | ||
`)) | ||
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func main() { | ||
r := gin.Default() | ||
r.Static("/assets", "./assets") | ||
r.SetHTMLTemplate(html) | ||
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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", | ||
}) | ||
}) | ||
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// Listen and Server in https://127.0.0.1:8080 | ||
r.RunTLS(":8080", "./testdata/server.pem", "./testdata/server.key") | ||
} |
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-----BEGIN CERTIFICATE----- | ||
MIICSjCCAbOgAwIBAgIJAJHGGR4dGioHMA0GCSqGSIb3DQEBCwUAMFYxCzAJBgNV | ||
BAYTAkFVMRMwEQYDVQQIEwpTb21lLVN0YXRlMSEwHwYDVQQKExhJbnRlcm5ldCBX | ||
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HQ8BAf8EBAMCAgQwDQYJKoZIhvcNAQELBQADgYEAHzC7jdYlzAVmddi/gdAeKPau | ||
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Dfcog5wrJytaQ6UA0wE= | ||
-----END CERTIFICATE----- |
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-----BEGIN PRIVATE KEY----- | ||
MIICdQIBADANBgkqhkiG9w0BAQEFAASCAl8wggJbAgEAAoGBAOHDFScoLCVJpYDD | ||
M4HYtIdV6Ake/sMNaaKdODjDMsux/4tDydlumN+fm+AjPEK5GHhGn1BgzkWF+slf | ||
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tTCbKGW0pXDRBhwUHRcuRzScjli8Rih5UOCiZkhefUTcRb6xIhZJuQy71tjaSy0p | ||
dHZRmYyBYO2YEQ8xoQJBAPrJPhMBkzmEYFtyIEqAxQ/o/A6E+E4w8i+KM7nQCK7q | ||
K4JXzyXVAjLfyBZWHGM2uro/fjqPggGD6QH1qXCkI4MCQQDmdKeb2TrKRh5BY1LR | ||
81aJGKcJ2XbcDu6wMZK4oqWbTX2KiYn9GB0woM6nSr/Y6iy1u145YzYxEV/iMwff | ||
DJULAkB8B2MnyzOg0pNFJqBJuH29bKCcHa8gHJzqXhNO5lAlEbMK95p/P2Wi+4Hd | ||
aiEIAF1BF326QJcvYKmwSmrORp85AkAlSNxRJ50OWrfMZnBgzVjDx3xG6KsFQVk2 | ||
ol6VhqL6dFgKUORFUWBvnKSyhjJxurlPEahV6oo6+A+mPhFY8eUvAkAZQyTdupP3 | ||
XEFQKctGz+9+gKkemDp7LBBMEMBXrGTLPhpEfcjv/7KPdnFHYmhYeBTBnuVmTVWe | ||
F98XJ7tIFfJq | ||
-----END PRIVATE KEY----- |
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-----BEGIN CERTIFICATE----- | ||
MIICnDCCAgWgAwIBAgIBBzANBgkqhkiG9w0BAQsFADBWMQswCQYDVQQGEwJBVTET | ||
MBEGA1UECBMKU29tZS1TdGF0ZTEhMB8GA1UEChMYSW50ZXJuZXQgV2lkZ2l0cyBQ | ||
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9N8YwbBYAckOeUQadTi2X1S6OgJXgQ0m3MWhAgMBAAGjazBpMAkGA1UdEwQCMAAw | ||
CwYDVR0PBAQDAgXgME8GA1UdEQRIMEaCECoudGVzdC5nb29nbGUuZnKCGHdhdGVy | ||
em9vaS50ZXN0Lmdvb2dsZS5iZYISKi50ZXN0LnlvdXR1YmUuY29thwTAqAEDMA0G | ||
CSqGSIb3DQEBCwUAA4GBAJFXVifQNub1LUP4JlnX5lXNlo8FxZ2a12AFQs+bzoJ6 | ||
hM044EDjqyxUqSbVePK0ni3w1fHQB5rY9yYC5f8G7aqqTY1QOhoUk8ZTSTRpnkTh | ||
y4jjdvTZeLDVBlueZUTDRmy2feY5aZIU18vFDK08dTG0A87pppuv1LNIR3loveU8 | ||
-----END CERTIFICATE----- |
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// +build !go1.8 | ||
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// Copyright 2018 Gin Core Team. All rights reserved. | ||
// Use of this source code is governed by a MIT style | ||
// license that can be found in the LICENSE file. | ||
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package gin | ||
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// ResponseWriter ... | ||
type ResponseWriter interface { | ||
responseWriterBase | ||
} |
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// +build go1.8 | ||
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// Copyright 2018 Gin Core Team. All rights reserved. | ||
// Use of this source code is governed by a MIT style | ||
// license that can be found in the LICENSE file. | ||
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package gin | ||
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import ( | ||
"net/http" | ||
) | ||
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// ResponseWriter ... | ||
type ResponseWriter interface { | ||
responseWriterBase | ||
// get the http.Pusher for server push | ||
Pusher() http.Pusher | ||
} | ||
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func (w *responseWriter) Pusher() (pusher http.Pusher) { | ||
if pusher, ok := w.ResponseWriter.(http.Pusher); ok { | ||
return pusher | ||
} | ||
return nil | ||
} |