Überauth Wechat Miniapp

Wechat Miniapp OAuth2 strategy for Überauth.

Installation

1. Add :ueberauth_wechat_miniapp to your list of dependencies in mix.exs:

   def deps do
     [{:ueberauth_wechat_miniapp, github: "edwardzhou/ueberauth_wechat_miniapp"}]
   end

2. Add the strategy to your applications:

   def application do
     [applications: [:ueberauth_wechat_miniapp]]
   end

3. Add Wechat to your Überauth configuration:

   config :ueberauth, Ueberauth,
     providers: [
       wechat_miniapp: {Ueberauth.Strategy.WechatMiniapp, []}
     ]

4. Update your provider configuration:

   config :ueberauth, Ueberauth.Strategy.WechatMiniapp.OAuth,
     client_id: System.get_env("WECHAT_MINIAPP_APPID"),
     client_secret: System.get_env("WECHAT_MINIAPP_SECRET")

5. Include the Überauth plug in your controller:

   defmodule MyApp.AuthController do
     use MyApp.Web, :controller
   
     pipeline :browser do
       plug Ueberauth
       ...
      end
   end

6. Create the request and callback routes if you haven't already:

   scope "/auth", MyApp do
     pipe_through :browser
   
     get "/:provider/callback", AuthController, :callback
     post "/:provider/callback", AuthController, :callback
   end

7. You controller needs to implement callbacks to deal with Ueberauth.Auth and Ueberauth.Failure responses.

For an example implementation see the Überauth Example application.

Calling

get or post
/auth/wechat_miniapp/callback?code=<js_code>&iv=<iv>&encrypted_data=<encrypted_data>&signature=<signature>&raw_data=<raw_data>

Wechat Miniapp oauth sample:

    // try login
    // 登录
    wx.login({
        success: res => {
        if (res.code) {
            const code = res.code;

            wx.getUserInfo({withCredentials: true,
            success: user_res => {
                var form_data = {
                code: code,
                raw_data: user_res.rawData,
                signature: user_res.signature,
                encrypted_data: user_res.encryptedData,
                iv: user_res.iv
                }

                wx.request({
                url: 'https://your.domain.com/auth/wechat_miniapp/callback',
                data: form_data,
                success: login_res => {
                    console.log("login response: " + JSON.stringify(res));
                },
                fail: res => {
                console.log("login failed!")
                }
                })
            }
            })
        }
        }
    })