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关于php微信订阅号开发之token验证后自动发送消息给订阅号但是没有消息返回的问题_PHP

May 29, 2016 am 11:47 AM

相信很多人会跟我一样,token验证之后,发送消息给订阅号,没有消息返回。

以下,说一下我辛苦调试得到的解决办法:

首先,token验证:

自己写的token一直验证失败,找了好久,没有发现bug。实在没办法,就用了官方的示例代码。并且通过示例代码调试,发现了一个让我吐血的bug(也不算bug):

token验证貌似要求字符编码格式!!!!

官方的示例代码,直接上传到服务器,token直接过!

把官方示例代码改为UTF-8格式,再上传覆盖,token失败!失败!失败!

后来,把自己写的修改为ANSI格式还是token失败!醉了醉了!那只好用官方示例代码。在此,说下,token是一次握手验证,验证过一次就不用了。

下面,言归正传,貌似偏题了...orz

token验证之后,直接用官方示例代码,赶紧测试自己的订阅号,结果....发出去的消息就跟泼出去的水一样,什么鬼都没有返回...orz

又各种找bug,各种群问,各种搜索....历经本博主九九八十一的努力,终于找出了问题所在(这里是指我自己开发的,并不包括全部,如果你有不同的bug,欢迎交流):

1、最容易被忽视的一个bug,官方给的示例代码,压根就没调用写好的那个responseMsg()函数!

2、把之前的token代码注释,也就是$wechatObj->valid();这行代码。因为toke验证那段代码会有一个echo $echostr,会把responseMsg()函数里的echo $resultStr;(56行)xml格式混乱,输回给微信服务器就无法识别了(貌似只能识别xml格式,还有json格式)。(token验证是一次握手验证,验证开发者之后,就可以不用了,赶紧让它消失在我们整洁的代码orz...)

3、最恶心的一个bug,还是字符编码问题!orz...xml要求UTF-8编码,所以,把示例代码改回UTF-8编码!这个bug找的让我崩溃!!!

下面是我修改后的代码,能正常运行,无bug,需要的可以参考一下

<&#63;php
 /**
 * wechat php test
 */
 //define your token
 define("TOKEN", "codcodog");
 $wechatObj = new wechatCallbackapiTest();
 //$wechatObj->valid();
 $wechatObj->responseMsg();
 class wechatCallbackapiTest
 {
  public function valid()
  {
   $echoStr = $_GET["echostr"];
   //valid signature , option
   if($this->checkSignature()){
   header('content-type:text');
    echo $echoStr;
    exit;
   }
  }
  public function responseMsg()
  {
   //get post data, May be due to the different environments
   $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
   //$postStr = file_get_contents("php://input");
   file_put_contents("log.txt",$postStr,FILE_APPEND );
   //extract post data
   if (!empty($postStr)){
     /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
     the best way is to check the validity of xml by yourself */
     libxml_disable_entity_loader(true);
     $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
     $fromUsername = $postObj->FromUserName; //用户
     $toUsername = $postObj->ToUserName;  //公众平台
     $keyword = trim($postObj->Content);
     $time = time();
     $textTpl = "<xml>
        <ToUserName><![CDATA[%s]]></ToUserName>
        <FromUserName><![CDATA[%s]]></FromUserName>
        <CreateTime>%s</CreateTime>
        <MsgType><![CDATA[%s]]></MsgType>
        <Content><![CDATA[%s]]></Content>
        <FuncFlag></FuncFlag>
        </xml>";    
     if(!empty( $keyword ))
     {
      $msgType = "text";
      $contentStr = "Welcome to wechat world!";
      $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
      echo $resultStr;
     }else{
      echo "Input something...";
     }
   }else {
    echo "";
    exit;
   }
  }
  private function checkSignature()
  {
   // you must define TOKEN by yourself
   if (!defined("TOKEN")) {
    throw new Exception('TOKEN is not defined!');
   }
   $signature = $_GET["signature"];
   $timestamp = $_GET["timestamp"];
   $nonce = $_GET["nonce"];
   $token = TOKEN;
   $tmpArr = array($token, $timestamp, $nonce);
   // use SORT_STRING rule
   sort($tmpArr, SORT_STRING);
   $tmpStr = implode( $tmpArr );
   $tmpStr = sha( $tmpStr );
   if( $tmpStr == $signature ){
    return true;
   }else{
    return false;
   }
  }
 }
 &#63;>
Copy after login

以上所述是小编给大家分享的php微信订阅号开发之token验证后自动发送消息给订阅号但是没有消息返回的解决方案,希望大家喜欢。

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