cors

Martini middleware/handler to enable CORS support.

Usage

import (
  "github.com/go-martini/martini"
  "github.com/martini-contrib/cors"
)

func main() {
  m := martini.Classic()
  // CORS for https://foo.* origins, allowing:
  // - PUT and PATCH methods
  // - Origin header
  // - Credentials share
  m.Use(cors.Allow(&cors.Options{
    AllowOrigins:     []string{"https://*.foo.com"},
    AllowMethods:     []string{"PUT", "PATCH"},
    AllowHeaders:     []string{"Origin"},
    ExposeHeaders:    []string{"Content-Length"},
    AllowCredentials: true,
  }))
  m.Run()
}

You may alternatively prefer to allow CORS only for certain routes. Instead of using the CORS middleware app-wide, register it for the prefered routes. The following snippet demonstrates how to enable CORS for /api/books endpoint's PUT handler.

m := martini.Classic()
allowCORSHandler := cors.Allow(&cors.Options{
  AllowOrigins:     []string{"https://*.foo.com"},
  AllowMethods:     []string{"PUT", "PATCH"},
  AllowHeaders:     []string{"Origin"},
})

m.Put("/api/books", allowCORSHandler, func() string {
  // ...
})

Authors

Burcu Dogan