大家都知道微信要想成為微信開(kāi)發(fā)者，必須在微信公眾號(hào)后臺(tái)配置回調(diào)url,也就是開(kāi)發(fā)者服務(wù)器url ,url代表開(kāi)發(fā)者接收微信事件的地址，token由開(kāi)發(fā)者隨意填寫(xiě)，之前是已經(jīng)開(kāi)發(fā)好的，服務(wù)器配置也弄好了，可是過(guò)了兩個(gè)月發(fā)現(xiàn)在以同樣的方式接入，總是提示：＂token驗(yàn)證失敗＂，真實(shí)百思不得其解；
index-wechat.jpg
分析原因
(1). 接入文件不能有BOM，(查看后沒(méi)有BOM)
(2).在服務(wù)器端驗(yàn)證通過(guò)后，原樣輸出echoStr之前不能有任何輸出，所有要關(guān)閉php的display_errors=off，(已確定設(shè)置）
(3).在服務(wù)器端驗(yàn)證通過(guò)后，寫(xiě)入文件，查看文件內(nèi)容，（發(fā)現(xiàn)沒(méi)有問(wèn)題，輸出true，說(shuō)明通過(guò)服務(wù)器驗(yàn)證）
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 = sha1( $tmpStr );
if( $tmpStr == $signature ){
//在這里將true寫(xiě)入文件
return true;
}else{
return false;
}
}
此時(shí)微信端依然報(bào)＂token驗(yàn)證失敗＂
(4) 在網(wǎng)上找到微信官方接入demo
<?php
/**
* wechat php test
*/
//define your token
define("TOKEN", "weixin");
$wechatObj = new wechatCallbackapiTest();
$wechatObj->valid();
class wechatCallbackapiTest
{
public function valid()
{
$echoStr = $_GET["echostr"];
//valid signature , option
if($this->checkSignature()){
echo $echoStr;
exit;
}
}
public function responseMsg()
{
//get post data, May be due to the different environments
$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
//extract post data
if (!empty($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;
$toUsername = $postObj->ToUserName;
$keyword = trim($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>0</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 = sha1( $tmpStr );
if( $tmpStr == $signature ){
return true;
}else{
return false;
}
}
}
?>
配置后請(qǐng)求該demo內(nèi)容，微信提示＂提交成功＂（注意：在同一域名下）
(5) 最后分析，我們的接入文件是在thinkphp框架下的，不是直接訪問(wèn)的.php文件，最后解決辦法是在echo $echoStr;之前ob_clean();清空（擦掉）輸出緩沖區(qū)解決；
public function valid($echoStr)
{
if($this->checkSignature())
{
ob_clean();//清空（擦掉）輸出緩沖區(qū)解決，這一行很關(guān)鍵
echo $echoStr;//原路返回驗(yàn)證的隨機(jī)字符串
exit;
}
}
