使用PHP调用微信API做通知类应用

MySense

相比于最常用的短信和邮件的通知方式，微信有着无可比拟的优势：快速、免费，特别适合用在报警通知类应用上。
但是微信并没有提供现成的api接口来给好友发送信息，公众平台也只能被动回复。那么如何才能主动发信息呢？答案就在微信网页版。
仔细观察微信网页版和服务器请求的记录，发现完全就是以oauth授权方式运行，完全不用考虑cookie。据此，分析请求记录，就能模拟网页版登录微信，从而实现主动向用户发送消息的功能。
以下是用到的请求：
1. 获取uuid，从返回的数据中，找到uuid

1. 
   
2. <P>https://login.weixin.qq.com/jslogin?appid=wx782c26e4c19acffb&redirect_uri=https%3A%2F%2Fwx.qq.com%2Fcgi-bin%2Fmmwebwx-bin%2Fwebwxnewloginpage&fun=new&lang=zh_CN</P>

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2. 获取二维码图片，然后使用微信扫描

1. 
   
2. <P>https://login.weixin.qq.com/qrcode/$this->uuid?t=webwx</P>

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3. 获取令牌，轮询，直到从返回的数据中找到window.redirect_uri=xxxx的代码，xxx就是令牌url

1. 
   
2. <P>https://login.weixin.qq.com/cgi-bin/mmwebwx-bin/login?uuid=$this->uuid&tip=1</P>

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4. 访问令牌url，获取sid。从返回的头信息中，分析出Uin,sid和uuid，保存起来
xxxxxx
5. 初始化微信，从返回的数据中读取UserName

1. $data = array(
   
2. "BaseRequest"=>array(
   
3. "DeviceID" => 'e538770852445779',
   
4. "Sid" => $this->sid,
   
5. "Skey" => "",
   
6. "Uin" => $this->Uin,
   
7. )
   
8. );
   
9. $this->post_contents('https://wx.qq.com/cgi-bin/mmwebwx-bin/webwxinit', $this->encode($data));

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$data = array(     "BaseRequest"=>array(         "DeviceID"  => 'e538770852445779',         "Sid"   => $this->sid,         "Skey"  => "",         "Uin"   => $this->Uin,     ) ); $this->post_contents('https://wx.qq.com/cgi-bin/mmwebwx-bin/webwxinit', $this->encode($data));

6. 获取Skey

1. $this->post_contents('https://wx.qq.com/cgi-bin/mmwebwx-bin/webwxsync?sid=' . urlencode($this->sid), '{"BaseRequest":{"Uin":'.$this->Uin.',"Sid":"'.$this->sid.'"},"SyncKey":{"Count":0,"List":[]}}');

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1	$this->post_contents('https://wx.qq.com/cgi-bin/mmwebwx-bin/webwxsync?sid=' . urlencode($this->sid), '{"BaseRequest":{"Uin":'.$this->Uin.',"Sid":"'.$this->sid.'"},"SyncKey":{"Count":0,"List":[]}}');

7. 发送消息，POST方式，

1. $data = array(
   
2. "BaseRequest" => array(
   
3. "Uin"=> $this->Uin,
   
4. "Sid"=> $this->sid,
   
5. "Skey"=> $this->Skey,
   
6. "DeviceID"=> $this->DeviceID,
   
7. ),
   
8. "Msg" => array(
   
9. "FromUserName" => $this->FromUserName,
   
10. "ToUserName" => $name,
    
11. "Type" => 1,
    
12. "Content" => $content,
    
13. "ClientMsgId" => $this->ClientMsgId,
    
14. "LocalID" => $this->ClientMsgId,
    
15. ),
    
16. );
    
17. $str = $this->encode($data);
    
18. son_decode($this->post_contents('https://wx.qq.com/cgi-bin/mmwebwx-bin/webwxsendmsg?sid=' . urlencode($this->sid) . '&r=' .$this->ClientMsgId, $str), true);

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$data = array(     "BaseRequest" => array(         "Uin"=> $this->Uin,         "Sid"=> $this->sid,         "Skey"=> $this->Skey,         "DeviceID"=> $this->DeviceID,     ),     "Msg" => array(         "FromUserName" => $this->FromUserName,         "ToUserName" => $name,         "Type" => 1,         "Content" => $content,         "ClientMsgId" => $this->ClientMsgId,         "LocalID" => $this->ClientMsgId,     ), ); $str = $this->encode($data); son_decode($this->post_contents('https://wx.qq.com/cgi-bin/mmwebwx-bin/webwxsendmsg?sid=' . urlencode($this->sid) . '&r=' .$this->ClientMsgId, $str), true);

发送消息的经典过程为：

• 初始化对象，设置Uin,sid,uuid
• 更新Skey
• 发送信息
  

但是微信网页版长时间不登录会失效，所以还需要写个任务去ping

1. $data = '{"BaseRequest":{"Uin":'.$this->Uin.',"Sid":"'.$this->sid.'"},"SyncKey":{"Count":0,"List":[]}}';
   
2. $ret = json_decode($this->post_contents('https://wx.qq.com/cgi-bin/mmwebwx-bin/webwxsync?sid=' . urlencode($this->sid), $data, 30), true);

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1 2	$data = '{"BaseRequest":{"Uin":'.$this->Uin.',"Sid":"'.$this->sid.'"},"SyncKey":{"Count":0,"List":[]}}';         $ret = json_decode($this->post_contents('https://wx.qq.com/cgi-bin/mmwebwx-bin/webwxsync?sid=' . urlencode($this->sid), $data, 30), true);

微信的数据都是以json格式传输的，但是他这个json比较特殊，还需要用特别的函数来实现

1. protected function encode($data){
   
2. if(!is_array($data)){
   
3. return $this->encode_str($data);
   
4. }
   
5. $ds = array();
   
6. foreach($data as $k => $v){
   
7. $ds [] = ""$k":" . $this->encode($v);
   
8. }
   
9. return '{' . join(',', $ds) . '}';
   
10. }
    
11. 
    
12. protected function encode_str($str){
    
13. if(preg_match('|^\d+$|', $str)){
    
14. return $str;
    
15. }
    
16. return '"' . str_replace('"', '"', iconv('GBK', 'UTF-8', $str)) . '"';
    
17. }

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protected function encode($data){     if(!is_array($data)){         return $this->encode_str($data);     }     $ds = array();     foreach($data as $k => $v){         $ds [] = "\"$k\":" . $this->encode($v);     }     return '{' . join(',', $ds) . '}'; } protected function encode_str($str){     if(preg_match('|^\d+$|', $str)){         return $str;     }     return '"' . str_replace('"', '\"', iconv('GBK', 'UTF-8', $str)) . '"'; }