dial tcp 127.0.0.1:8088: Connection refused

[gepengscu]

I use resty in wasm application, and got "dial tcp 127.0.0.1:8088: Connection refused". http.Get() got the correct response.

func tryResty() {
	fmt.Println("try http get=========================OK")
	r, err := http.Get("/v2/demo/ping")
	if err != nil {
		app.Log(err)
		return
	}
	defer r.Body.Close()

	b, err := ioutil.ReadAll(r.Body)
	if err != nil {
		app.Log(err)
		return
	}
	fmt.Println(string(b))
	fmt.Println("try resty get=========================Failed")
	resp, err := resty.New().R().Get("http://127.0.0.1:8088/v2/demo/ping")
	if err != nil {
		fmt.Println(err.Error())
		return
	}
	fmt.Println(string(resp.Body()))
}

[moorereason]

I can't replicate your claims:

$ go run .
try http get=========================
2022/01/11 18:46:54 Get "/v2/demo/ping": unsupported protocol scheme ""
exit status 1

What version of Go? Resty? Are you doing other things with the http package outside of this function? Can you provide a standalone reproducer (a simple main.go)?

I'm testing with Go v1.17.5, resty v2.7.0, and the following:

package main

import (
        "fmt"
        "io/ioutil"
        "log"
        "net/http"

        "github.com/go-resty/resty/v2"
)

func main() {
        fmt.Println("try http get=========================")
        r, err := http.Get("/v2/demo/ping")
        if err != nil {
                log.Fatal(err)
        }
        defer r.Body.Close()

        b, err := ioutil.ReadAll(r.Body)
        if err != nil {
                log.Fatal(err)
        }

        fmt.Println(string(b))
        fmt.Println("try resty get=========================")
        resp, err := resty.New().R().Get("http://127.0.0.1:8088/v2/demo/ping")
        if err != nil {
                fmt.Println(err.Error())
                return
        }
        fmt.Println(string(resp.Body()))
}

[gepengscu]

It will be ok if run the test func in a normal windows or linux application, but wrong as a wasm app.
I've solved the problem by seting transport.

...
resp, err := resty.New().
  SetTransport(http.DefaultTransport).
  R().
  Get("http://127.0.0.1:8088/v2/demo/ping")
...

[shynome]

I resolve this, set resty default http Transport DialContext to nil

c.GetClient().Transport.(*http.Transport).DialContext = nil