POST request treated as OPTIONS on beego framework

Question

I'm using beego framework as my API framework and AngularJS on the client. I have set all CORS setting correctly. I can do GET request. But, when i try to POST, beego treat is as OPTIONS request. It also throw a warning: multiple response.WriteHeader calls. what could possibly wrong?

my beego CORS setting:

func init() {
    orm.RegisterDataBase("default", "mysql", "root:@tcp(127.0.0.1:3306)/fakeapi")
    beego.InsertFilter("*", beego.BeforeRouter, cors.Allow(&cors.Options{
        AllowOrigins:     []string{"*"},
        AllowMethods:     []string{"GET", "DELETE", "PUT", "PATCH", "POST"},
        AllowHeaders:     []string{"Origin"},
        ExposeHeaders:    []string{"Content-Length"},
        AllowCredentials: true,
    }))

}

My ANgularJS request

var transaction = $http.post(BASE_URL + "transaction", transactionData);
                return $q.all([transaction]).then(function(response) {
            console.log(response);
        });

my system: Ubuntu 14.04 beego: 1.4.2 bee: 1.2.4 angularJS: 1.3.12

Answer 1

That might because of an issue/pull request currently pending to be merged into master: issue 912

Without this line everything is fine:: router.go#L861

That seems to be in line with commit 3bb4d6f which shows:

// Write status code if it has been set manually
// Set it to 0 afterwards to prevent "multiple response.WriteHeader calls"

(and router.go do set a status, hence the error message)

Commit f962457 is supposed to solve this issue, but isn't merged yet.

---

The other issue 904 mentions something about being unable to retrieve the Session data previously registered in the Session Engine. Maybe Session.on flag can help.

Answer 2

I handle it like that, I hope it helps

import (
_ "info_apoyo/routers"

"github.com/astaxie/beego"
"github.com/astaxie/beego/plugins/cors"
)

func main() {
if beego.BConfig.RunMode == "dev" {
    beego.BConfig.WebConfig.DirectoryIndex = true
    beego.BConfig.WebConfig.StaticDir["/swagger"] = "swagger"
}
beego.InsertFilter("*", beego.BeforeRouter, cors.Allow(&cors.Options{
    AllowOrigins:     []string{"*"},
    AllowMethods:     []string{"GET", "POST", "DELETE", "PUT", "PATCH"},
    AllowHeaders:     []string{"Origin", "content-type", "Access-Control-
Allow-Origin"},
    ExposeHeaders:    []string{"Content-Length", "Access-Control-Allow-
Origin"},
    AllowCredentials: true,
}))
beego.Run()
}