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server.go
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server.go
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package main
import (
"encoding/json"
"fmt"
"log"
"net/http"
"strconv"
"time"
"github.com/anninpavel/firebase-auth-vk/vk"
)
func main() {
log.Println("FireBase Auth Vk Starting")
env := NewEnvironment()
server := &http.Server{
Addr: env.conf.Port,
Handler: nil,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
MaxHeaderBytes: 1 << 20,
}
if env.vk.OAuth() != nil {
log.Fatal("[Vk] error auth")
}
http.HandleFunc(env.conf.Path, env.authVk)
log.Fatal(server.ListenAndServe())
}
// AuthVkResponce -- Структура ответа сервера на запрос авторизации через VK
type AuthVkResponce struct {
Token string `json:"token"`
FullName string `json:"userName"`
Avatar string `json:"userAvatar"`
}
func (env *Environment) authVk(w http.ResponseWriter, r *http.Request) {
startTime := time.Now()
log.Println(r.RemoteAddr, "--> AuthVk", "("+r.Method+")")
defer func() {
log.Println(r.RemoteAddr, "<-- AuthVk", "("+time.Now().Sub(startTime).String()+")")
}()
if r.Method != http.MethodPost {
http.Error(w, "", http.StatusNotFound)
return
}
err := r.ParseForm()
if err != nil {
http.Error(w, "Required parameters: userId, accessToken", http.StatusBadRequest)
return
}
vkUserID, err := strconv.ParseInt(r.Form.Get("userId"), 10, 64)
vkUserToken := r.Form.Get("accessToken")
userLanguage := r.Form.Get("lang")
if err != nil || len(vkUserToken) == 0 {
http.Error(w, "Required parameters: userId, accessToken", http.StatusBadRequest)
return
}
checkToken, err := env.vk.CheckUserToken(vkUserToken)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if vkUserID != checkToken.Response.UserID {
http.Error(w, "UserId does not match token", http.StatusBadRequest)
return
}
user, err := env.vk.GetUserProfile(vkUserID, vkUserToken, findLanguage(userLanguage))
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
token, err := env.firebase.CreateCustomToken(strconv.FormatInt(vkUserID, 10))
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
json, err := json.Marshal(AuthVkResponce{
Token: token,
FullName: fmt.Sprintf("%s %s", user.FirstName, user.LastName),
Avatar: user.Photo,
})
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
w.Write(json)
}
func findLanguage(lang string) vk.Lang {
switch lang {
case "ru":
return vk.LangRU
case "ua":
return vk.LangUA
case "be":
return vk.LangBE
case "en":
return vk.LangEN
case "es":
return vk.LangES
case "fi":
return vk.LangFI
case "de":
return vk.LangDE
case "it":
return vk.LangIT
default:
return vk.LangEN
}
}