23 四 09 编写ASP uc-client与UC通信时遇到Access denied for agent changed

最近研究ASP 和康盛UCENTER通信，遇到了新的问题，

那就是在写uc_user_login等client端函数时遇到 Access denied for agent changed 问题。

原因在于之前对UC与应用程序之间通信的校验原理没搞清楚的原因

故写博客备忘：

表忘记在http头提交需要的东东。

UC/model/base.php 中校验的http_user_agent是在模拟提交的过程中的当前客户浏览器的usera gent ，

如果在模拟提交过程中，没有将当前用户的useragent提交上去的话，那么UC在

uc/model/base.php 中的 init_input方法获取到的http_user_agent将会是应用服务器当前系统的默认user agent，

而不是客户端的http_user_agent，从而导致 http_user_agent 校验失败，而无法正常通信。

以下是PHP和ASP模拟提交的代码

PHP代码

function uc_fopen($url, $limit = 0, $post = ”, $cookie = ”, $bysocket = FALSE, $ip = ”, $timeout = 15, $block = TRUE) {
$return = ”;
$matches = parse_url($url);
!isset($matches['host']) && $matches['host'] = ”;
!isset($matches['path']) && $matches['path'] = ”;
!isset($matches['query']) && $matches['query'] = ”;
!isset($matches['port']) && $matches['port'] = ”;
$host = $matches['host'];
$path = $matches['path'] ? $matches['path'].($matches['query'] ? ‘?’.$matches['query'] : ”) : ‘/’;
$port = !emptyempty($matches['port']) ? $matches['port'] : 80;
if($post) {
$out = “POST $path HTTP/1.0\r\n”;
$out .= “Accept: */*\r\n”;
//$out .= ”Referer: $boardurl\r\n”;
$out .= “Accept-Language: zh-cn\r\n”;
$out .= “Content-Type: application/x-www-form-urlencoded\r\n”;
$out .= “User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n”;
$out .= “Host: $host\r\n”;
$out .= ‘Content-Length: ’.strlen($post).“\r\n”;
$out .= “Connection: Close\r\n”;
$out .= “Cache-Control: no-cache\r\n”;
$out .= “Cookie: $cookie\r\n\r\n”;
$out .= $post;
} else {
$out = “GET $path HTTP/1.0\r\n”;
$out .= “Accept: */*\r\n”;
//$out .= ”Referer: $boardurl\r\n”;
$out .= “Accept-Language: zh-cn\r\n”;
$out .= “User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n”;
$out .= “Host: $host\r\n”;
$out .= “Connection: Close\r\n”;
$out .= “Cookie: $cookie\r\n\r\n”;
}
$fp = @fsockopen(($ip ? $ip : $host), $port, $errno, $errstr, $timeout);
if(!$fp) {
return ”;
} else {
stream_set_blocking($fp, $block);
stream_set_timeout($fp, $timeout);
@fwrite($fp, $out);
$status = stream_get_meta_data($fp);
if(!$status['timed_out']) {
while (!feof($fp)) {
if(($header = @fgets($fp)) && ($header == “\r\n” || $header == “\n”)) {
break;
}
}
$stop = false;
while(!feof($fp) && !$stop) {
$data = fread($fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit));
$return .= $data;
if($limit) {
$limit -= strlen($data);
$stop = $limit <= 0;
}
}
}
@fclose($fp);
return $return;
}
}