wechat-platform
===========

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微信第三方平台工具模块


## Install

```bash
$ npm install wechat-platform --save
```

## 功能

- ### 授权
  - 获取微信推送给第三方平台的component_verify_ticket（十分钟推送一次）
  - component_verify_ticket换取第三方平台component_access_token
  - component_access_token换取预授权码pre_auth_code。
  - 构建跳转URL，用户授权后获取授权码authorization_code
  - authorization_code换取授权公众号的授权信息

- ### 授权后功能
  - 使用authorizer_access_token访问公众号API

## 代码片段示例

### config.js

```js
var config = {};

config.wechat = {
  appid: 'appid',
  appsecret: 'appsecret',
  msg_token: 'token',
  msg_aeskey: 'aeskey'
};

config.redis = {
  host: '192.168.0.111',
  port: 6379,
  options: {
    connect_timeout: 30000
  }
};

module.exports = config;
```

### service.js 获取token

``` js
/**
 * Module dependencies.
 */
var OAuth = require('wechat-platform').OAuth;
var ComponentToken = require('wechat-platform').ComponentToken;

var RedisCo = require('./redisCo');
var config = require('./config');

var redisClient = RedisCo(config.redis).client;
var oAuth = OAuth(config.wechat);

/**
 * redis key
 */
const PLATFORM_TICKET_KEY = 'qianmi.wechat.platform.ticket';
const PLATFORM_TOKEN_KEY = 'qianmi.wechat.platform.token';

/**
 * 获取第三方平台token
 */
exports.getComponentToken = function *() {
  var tokenData = JSON.parse(yield redisClient.get(PLATFORM_TOKEN_KEY));

  if(tokenData) {
    let componentToken = ComponentToken(tokenData);
    if (componentToken.isValid()) {
      return componentToken.data.access_token;
    }
  }

  var ticket = yield redisClient.get(PLATFORM_TICKET_KEY);
  tokenData = yield oAuth.getComponentToken(ticket);

  var result = ComponentToken(tokenData);
  redisClient.set(PLATFORM_TOKEN_KEY, JSON.stringify(result.data));

  return result.data.access_token;
}
```

### service.js 获取微信推送事件

```js
var Event = require('wechat-platform').Message;

exports.eventProxy = Event(config.wechat).proxy(function *(){
  var info = this.weixin;

  if(info.InfoType = 'component_verify_ticket') {
    //存入缓存
    redisClient.set(PLATFORM_TICKET_KEY, info.ComponentVerifyTicket);
  }

  this.body = 'success';
})
```

***其他功能点使用于此类似***

## 交流

有任何问题欢迎email作者：miclee_wj@hotmail.com

或者 [在此提交](https://github.com/OfMicLee/wechat-platform/issues)

## 捐赠
如果wechat-platform帮助到您了，欢迎请作者一杯咖啡。

![捐赠](https://raw.githubusercontent.com/OfMicLee/img-hosting/master/apc38b8h19qk5jcc47.png)