93 lines
2.3 KiB
Markdown
93 lines
2.3 KiB
Markdown
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# CORS gin's middleware
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[](https://travis-ci.org/gin-contrib/cors)
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[](https://codecov.io/gh/gin-contrib/cors)
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[](https://goreportcard.com/report/github.com/gin-contrib/cors)
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[](https://godoc.org/github.com/gin-contrib/cors)
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[](https://gitter.im/gin-gonic/gin)
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Gin middleware/handler to enable CORS support.
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## Usage
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### Start using it
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Download and install it:
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```sh
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$ go get gopkg.in/gin-contrib/cors.v1
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```
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Import it in your code:
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```go
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import "gopkg.in/gin-contrib/cors.v1"
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```
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### Canonical example:
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```go
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package main
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import (
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"time"
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"gopkg.in/gin-contrib/cors.v1"
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"github.com/gin-gonic/gin"
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)
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func main() {
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router := gin.Default()
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// CORS for https://foo.com and https://github.com origins, allowing:
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// - PUT and PATCH methods
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// - Origin header
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// - Credentials share
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// - Preflight requests cached for 12 hours
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router.Use(cors.New(cors.Config{
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AllowOrigins: []string{"https://foo.com"},
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AllowMethods: []string{"PUT", "PATCH"},
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AllowHeaders: []string{"Origin"},
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ExposeHeaders: []string{"Content-Length"},
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AllowCredentials: true,
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AllowOriginFunc: func(origin string) bool {
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return origin == "https://github.com"
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},
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MaxAge: 12 * time.Hour,
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}))
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router.Run()
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}
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```
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### Using DefaultConfig as start point
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```go
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func main() {
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router := gin.Default()
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// - No origin allowed by default
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// - GET,POST, PUT, HEAD methods
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// - Credentials share disabled
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// - Preflight requests cached for 12 hours
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config := cors.DefaultConfig()
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config.AllowOrigins = []string{"http://google.com"}
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config.AddAllowOrigins("http://facebook.com")
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// config.AllowOrigins == []string{"http://google.com", "http://facebook.com"}
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router.Use(cors.New(config))
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router.Run()
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}
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```
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### Default() allows all origins
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```go
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func main() {
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router := gin.Default()
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// same as
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// config := cors.DefaultConfig()
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// config.AllowAllOrigins = true
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// router.Use(cors.New(config))
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router.Use(cors.Default())
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router.Run()
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}
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```
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