meifamily/ptt-alertor

package messenger

import (
    "bytes"
    "encoding/json"
    "fmt"
    "io/ioutil"
    "net/http"
)

type MsgErr struct {
    ErrorBody `json:"error"`
}

type ErrorBody struct {
    Message      string `json:"message"`
    Type         string `json:"type"`
    Code         int    `json:"code"`
    ErrorSubCode int    `json:"error_subcode,omitempty"`
    FbtraceID    string `json:"fbtrace_id"`
}

func callAPI(url string, body interface{}) error {
    data, err := json.Marshal(body)
    if err != nil {
        return err
    }
    resp, err := http.Post(url, "application/json", bytes.NewBuffer(data))
    if err != nil {
        return err
    }
    defer resp.Body.Close()
    if resp.StatusCode != http.StatusOK {
        body, _ := ioutil.ReadAll(resp.Body)
        msgErr := &MsgErr{}
        json.Unmarshal(body, &msgErr)
        if msgErr.Code == 551 {
            return nil
        }
        return fmt.Errorf("%s(%d): %s", resp.Status, resp.StatusCode, string(body))
    }
    return nil
}