微信小程序开发(一)授权登录
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一、微信小程序获取发起请求获取code，发送给服务器
微信小程序，已经给出来很专业的技术文档，我们就按照他们给的步骤一点一点来就ok，不会有问题
var env = require('../config/env.js');
const DATAURL = env.getDomain('dataUrl');
const IMGCDNURL = env.getDomain('imgCdnUrl');
function loginSmall(func) {
var app = getApp()
//调用登录接口
var that = this;
wx.login({
success: function (login_res) {
if (login_res.code) {
wx.getUserInfo({
success: function (res) {
typeof cb == "function" && cb(that.globalData.userInfo)
//请求登录
wx.request({
url: DATAURL+'/app.php?c=SmallLogin&m=smallLoginAuth',
method: 'POST',
header: {
'content-type': 'application/x-www-form-urlencoded',
'loginType': 'smallapp'
},
dataType: 'json',
data: { encryptedData: res.encryptedData,
iv: res.iv, smallcode: login_res.code },
success: function (resu) {
console.log(resu);
if (resu.data.errno == 10000) {
wx.showToast({
title: '登录成功',
icon: 'success',
duration: 1000
})
//把sessionid存入storage
wx.setStorage({
key: 'sid',
data: resu.data.data.sid
})
if (typeof func == "function") func();
} else if (resu.data.errno == 10001) {
wx.showToast({
title: '登录失败',
icon: 'loading',
duration: 2000
})
} else if (resu.data.errno == 10002) {
wx.showToast({
title: resu.data.msg,
icon: 'loading',
duration: 2000
})
} else if (resu.data.errno == 10003) {
wx.showToast({
title: resu.data.msg,
icon: 'loading',
duration: 2000
})
} else {
wx.showToast({
title: '登录失败，请稍后重试',
icon: 'loading',
duration: 2000
})
}
},
fail: function () {
wx.showToast({
title: '系统错误',
icon: 'loading',
duration: 2000
})
}
})
}
})
} else {
console.log('获取用户登录态失败！' + login_res.errMsg)
}
},
fail: function(){
wx.showToast({
title: '获取登录状态失败',
icon: 'loading',
duration: 2000
})
}
});
}
module.exports = {
loginSmall: loginSmall,
}二微信服务器拿code凭证获取session_key和openid解密用户信息存入session返回给小程序
PHP登录接口获取的小程序的授权信息：
<?php
/**
* FileName: SmallLogin.php
* Description: 微信小程序登录
* Author: <lianghuiju@chuchujie.com>
* Date Time: 17/09/05
*/
defined('BASEPATH') OR exit('No direct script access allowed');
class SmallLogin extends CI_Controller
{
const SAPP_ID = "";//官方id
const SAPP_SECRET = "";//微信小程序都有给出直接换成自己的
//HTTP请求默认配置
public $curl_errno = 0;
public $curl_error = '';
//小程序登录
public function smallLoginAuth() {
$smallcode = $this->input->get_post('smallcode');
$encryptedData = $this->input->get_post('encryptedData');
$iv = $this->input->get_post('iv');
$keyData = $this->requestUserInfo($smallcode);
if (!empty($keyData)){
include(APPPATH . '../vendor/smallApp/wxBizDataCrypt.php');
$pc = new WXBizDataCrypt($this::SAPP_ID, $keyData['session_key']);
//检验数据的真实性，并且获取解密后的明文.
$errCode = $pc->decryptData($encryptedData, $iv, $data);
if ($errCode == 0) {
$user_info = json_decode($data,true);
$user_id = $this->getOpenidUserId($user_info);
if($user_id !== false){
$this->session->user_id = $user_id;
$this->session->xaphp_sopenid = $user_info['openId'];
$this->session->unionid = $user_info['unionId'];
}else{
//获取user_id 失败 或 注册失败
$this->renderOutput(array(), 10001, '登录失败', true);
}
}else {
log_message('NOTE', '拼团小程序-解密用户信息失败'.$errCode);
$this->renderOutput(array(),10002,$errCode.'获取用户信息失败10002',true);
}
} else{
//获取解密Key失败
$this->renderOutput(array(),10003,'获取用户信息失败10003',true);
}
$session_id = $this->session->sid;
//约定成功登录的状态码为10000
$lastData = array(
'sid' => $session_id
);
$this->renderOutput($lastData, 10000, '登录成功', true);
}
/**
* 向微信服务器 使用登录凭证 code 获取 session_key 和 openid
* @param $code
* @return mixed
* author : xujiwu@jiayuan.com
* function_name : decodeUserInfo
* description :
*/
public function requestUserInfo($code) {
//小程序唯一标识
$wxspAppid = $this::SAPP_ID;
//小程序的 app secret
$wxspSecret = $this::SAPP_SECRET;
//授权（必填）
$grant_type = "authorization_code";
//////向微信服务器 使用登录凭证 code 获取 session_key 和 openid
$params = "appid=" . $wxspAppid . "&secret=" . $wxspSecret
. "&js_code=" . $code . "&grant_type=" . $grant_type;
$url = "https://api.weixin.qq.com/sns/jscode2session?" . $params;
//发送请求
$sr = $this->httpGet($url);
//解析相应内容（转换成json对象）
$json = json_decode($sr, true);
if (empty($json['errcode'])) {
return $json;
} else {
//请求失败上报
reportCount(2309);
log_message('NOTE','小程序-'.$json['errcode'].":".$json['errmsg']);
return array();
}
}
/**
* 获取用户uid 未注册则注册
* @author yangshengkai@chuchujie.com
* @lastModifyTime 2017/9/5
* @lastModify yangshengkai@chuchujie.com
* @param getOpenidUserId
* @return bool
*/
public function getOpenidUserId($sappUserInfo){
$openid = $sappUserInfo['openId'];
$phone_number = '';
$this->load->model('UsersAccount');
$this->load->model('Users');
//第二个参数为是否获取password，默认false
$user_info = $this->UsersAccount->getUserIdByUserName($openid, true);
$user_id = $user_info['user_id'];
if (empty($user_id)){
$timestamp = time();
//注册新小程序用户
$username = 'sapp_' . crc32($openid) . '_' . mt_rand(1, 10000);
$password = md5($username . mt_rand(1000, 9999));
$uname = isset($sappUserInfo['nickName'])&&!empty($sappUserInfo['nickName'])
? $sappUserInfo['nickName']: 'chuchu_'.mt_rand(1000,9999);
$headimgurl = isset($sappUserInfo['avatarUrl'])
&&!empty($sappUserInfo['avatarUrl']) ?$sappUserInfo['avatarUrl'] : '';
$new_user = array(
'user_name' => $username,
'password' => $password,
'reg_time' => $timestamp,
'last_login' => $timestamp,
'uname' => $uname,
'headimgurl' => $headimgurl,
'openid' => $openid,
'phone_number' => $phone_number
);
$user_id = $this->Users->insert($new_user);
//插入到账号表中
if ($user_id) {
$user_account['user_id'] = $user_id;
$user_account['login_type'] = 3;//代表小程序登录
$user_account['user_name'] = $openid;
$user_account['password'] = $password;
$user_account['reg_time'] = $timestamp;
$user_account['last_login'] = $timestamp;
$account_id = $this->UsersAccount->insertData($user_account);
}
}
if (empty($user_id)) {
return false;
}
return $user_id;
}
//发起GET请求
public function httpGet($url, $data = null) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT_MS, 2000);
curl_setopt($ch, CURLOPT_TIMEOUT_MS, 5000);
$tmpInfo = curl_exec($ch);
$this->curl_errno = curl_errno($ch);
if ($this->curl_errno) {
$this->curl_error = curl_error($ch);
$param_str = (is_array($data) || is_object($data))
? json_encode($data) : (is_null($data) ? 'NULL' : $data);
$errmsg = "Curl Error {$this->curl_errno}:{$this->curl_error}
method[GET] url[$url] params[$param_str]";
log_message('NOTE', $errmsg);
}
curl_close($ch);
return $tmpInfo;
}
}官方给给出解密的文档和demo，你直接按照管饭给出来的来做就ok，下载地址
特别需要主要的是：
微信小程序是么有cookie这个概念的，我们之前的网站是session是基于cookie存储的。
所以在小程序请求服务器存储session是存入失败的，因此需要修改
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