how to get started about wechat-api HOT 11 CLOSED

It’s sample code. use redis/db instead of.

在 2016年3月31日，下午5:26，dc <[email protected] mailto:[email protected]> 写道：

Your examples don't seem to work to get started...

'use strict';

let debug = require('debug')('wechat-api');
let path = require('path');
let fs = require('fs');

let AppConfig = require('../../private/AppConfig');

var WechatAPI = require('wechat-api');

let tokenFilePath = path.join(__dirname, 'access_token.txt');

debug('init', tokenFilePath);

var api = new WechatAPI(AppConfig.APP_ID, AppConfig.APP_SECRET, function (callback) {
// 传入一个获取全局token的方法
fs.readFile(tokenFilePath, 'utf8', function (err, txt) {
debug('read token ', tokenFilePath, txt);
if (err) {return callback(err);}
callback(null, JSON.parse(txt));
});
}, function (token, callback) {
// 请将token存储到全局，跨进程、跨机器级别的全局，比如写到数据库、redis等
// 这样才能在cluster模式及多机情况下使用，以下为写入到文件的示例
debug('write token to ', tokenFilePath, token);
fs.writeFile(tokenFilePath, JSON.stringify(token), callback);
});

// var api = new WechatAPI(AppConfig.APP_ID, AppConfig.APP_SECRET);
api.updateRemark('open_id', 'remarked', function (err, data, res) {
debug('updateRemark', data, res);
});
results:

wechat-api init +56ms /Users/dc/dev/rikai/boteditor/lib/wechat/access_token.txt
wechat-api read token +11ms /Users/dc/dev/rikai/boteditor/lib/wechat/access_token.txt undefined
wechat-api updateRemark +1ms undefined undefined

so no token is being created or read.

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from wechat-api.

so this code does not return a token or a usable API?

from wechat-api.

If i obtain a token by my own code, can it be passed to this API for using the api.send ... methods?

from wechat-api.

this code works fine to obtain a token

but how to then use wechat-api with this token?

'use strict';

let syncRequest = require('sync-request');

let debug = require('debug')('WcTokenManager');
let AppConfig = require('../../private/AppConfig');
let WcTokenManager = {};


// TODO - store this in DB so we can access across multiple servers...
let tokenObj = null;


WcTokenManager.checkToken = function() {

  if (!tokenObj) {
    tokenObj = WcTokenManager.getNewAccessToken();
  }

  // else get a new token
  var nowTime = Math.floor(new Date().getTime() / 1000);
  var diff = tokenObj.expiresAt - nowTime;
  if (diff <= 100) {
    tokenObj = WcTokenManager.getNewAccessToken();
  }
  return tokenObj;
};

// // TODO - save to db
// WcTokenManager.saveAccessToken = function(accessToken) {
//
//   // expiresIn = 10; // for test expiresIn immediately
//   var expiresIn = accessToken.expiresIn || 7200;
//
//   var currentTime = Math.floor(new Date().getTime() / 1000);
//
//   var tokenObj = {
//       appId: ServerConfig.appId,
//       token: accessToken.access_token,
//       getTokenAt: currentTime,
//       expiresIn: expiresIn,
//       expiresAt: currentTime + expiresIn,
//       createdAt: new Date()
//   };
//
//   WcTokenManager.remove({ appId: ServerConfig.appId });
//   WcTokenManager.insert(tokenObj);
//
//   Logger.log('saveAccessToken', tokenObj);
//   tokenCache = tokenObj;
//   return tokenObj;
// };
//

// https://mp.weixin.qq.com/wiki/11/0e4b294685f817b95cbed85ba5e82b8f.html

WcTokenManager.getNewAccessToken = function() {

  var params = {
    appid: AppConfig.APP_ID,
    secret: AppConfig.APP_SECRET,
    grant_type: 'client_credential'
  };

  var url = AppConfig.API_ENDPOINT + '/cgi-bin/token';
  url += `?grant_type=client_credential&appid=${params.appid}&secret=${params.secret}`;
  // debug('getNewAccessToken url', url);

  var res = syncRequest('GET', url);
  // debug('res', res);
  var body = res.getBody().toString();
  var rawToken = JSON.parse(body);

  var expires_in = rawToken.expires_in || 7200;
  var currentTime = Math.floor(new Date().getTime() / 1000);

  var tokenObj = {
      appId: AppConfig.APP_ID,
      access_token: rawToken.access_token,
      expires_in: expires_in,
      expires_at: currentTime + expires_in,
      createdAt: new Date(),
      createdAtSecs: currentTime
  };
  debug('gotToken', tokenObj);
  return tokenObj;
};


WcTokenManager.tokenString = function() {
  var token = WcTokenManager.checkToken().access_token;
  return token;
};

// startup
WcTokenManager.checkToken();

module.exports = WcTokenManager;

from wechat-api.

'use strict';

let debug = require('debug')('wechat-api');
let path = require('path');
let redisClient = ...

let AppConfig = require('../../private/AppConfig');

var WechatAPI = require('wechat-api');

debug('init', tokenFilePath);

var api = new WechatAPI(AppConfig.APP_ID, AppConfig.APP_SECRET, function (callback) {
  redisClient.get('token_key', function (err,data) {
    if (err) {return callback(err);}
    callback(null, data && JSON.parse(data));
  });
}, function (token, callback) {
  redis.set('token_key', JSON.stringify(token),callback);
});

// var api = new WechatAPI(AppConfig.APP_ID, AppConfig.APP_SECRET);
api.updateRemark('open_id', 'remarked', function (err, data, res) {
  debug('updateRemark', data, res);
});

from wechat-api.

WechatAPI can auto get new token. You just need provide a save/get interface.

from wechat-api.

so

  redisClient.get('token_key', function (err,data) {
    callback(null, data && JSON.parse(data));

^ this is the command that calls the API of your library?

callback - passed in API
null - your API expects a null for first argument?

data && JSON.parse(data) - what is this???

I don't understand why the third param needs to && with the JSON.parse version??
what is the API expecting?
is there any actual documentation on this?

it seems very obfuscated in order to use this API?

from wechat-api.

here is some simple code to call WeChat APIs.

dataObject is a wechat JSON package.

WcApi.sendMessageToUser = function(dataObject) {
  var accessToken = WcTokenManager.tokenString();

  var url = AppConfig.API_ENDPOINT + '/cgi-bin/message/custom/send?access_token=' + accessToken;

  debug('sendMessageToUser:' + JSON.stringify(dataObject, null, 2));
  debug('url:', url);

  request.post(
      url,
      {
        body: dataObject,
        json: true
      }
    , function(error, result) {

from wechat-api.

@dcsan

callback(null, data && JSON.parse(data));
//equals
if(data) {
  callback(null, JSON.parse(data));
} else {
    callback(null)
}

from wechat-api.

thanks @looping84

but I'm interested why the sample code doesn't work.

first callback: readToken - returns undefined.

but the second callback to write the token is never called.

it should be possible to read/write to a file with fs?

so, changing this to use redis/db won't actually fix the problem as far as i can see.

from wechat-api.

@dcsan

https://github.com/node-webot/wechat-api/blob/master/lib/api_common.js#L154

if readToken returns undefined, the saving token method will be called

if save token can't be called , please debug your code.

from wechat-api.