Add support for CORS

pkg/api/middleware.go

@@ -76,3 +76,11 @@ func serveResult(result interface{}, err error, c *gin.Context) {
 
 	c.JSON(200, result)
 }
+
+func corsMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Header("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
+		c.Header("Access-Control-Allow-Origin", "*")
+		c.Header("Access-Control-Expose-Headers", "*")
+	}
+}

pkg/api/routes.go

@@ -10,6 +10,10 @@ func SetupMiddlewares(group *gin.RouterGroup) {
 		group.Use(requestInspectMiddleware())
 	}
 
+	if command.Opts.CORS {
+		group.Use(corsMiddleware())
+	}
+
 	group.Use(dbCheckMiddleware())
 }
 

pkg/command/options.go

@@ -36,6 +36,7 @@ type Options struct {
 	ConnectHeaders               string  `long:"connect-headers" description:"List of headers to pass to the connect backend"`
 	DisableConnectionIdleTimeout bool    `long:"no-idle-timeout" description:"Disable connection idle timeout" default:"false"`
 	ConnectionIdleTimeout        float64 `long:"idle-timeout" description:"Set connection idle timeout in minutes" default:"180"`
+	CORS                         bool    `long:"cors" description:"Enable Cross-Origin Resource Sharing (CORS)" default:"false"`
 }
 
 var Opts Options