php模拟post请求发送文件
由于项目需要,需要本地服务器接收数据后,再将数据转发到另外一台服务器上,故要用到模拟post请求发送数据,当然数据中也包含文件流。
curl是php比较常用的方式之一,一般代码如下:
$params1 = test; $params2 = @.$absolute_path;//如果是文件 则参数为@+绝对路径 $post_data = array( 'params1' => $params1, 'params2' => $params2, ); function postData($url, $data){ $ch = curl_init(); $timeout = 300; curl_setopt($ch, CURLOPT_URL, $url); //请求地址 //curl_setopt($ch, CURLOPT_REFERER, $ip);//构造来路 curl_setopt($ch, CURLOPT_POST, true); //post请求 curl_setopt($ch, CURLOPT_BINARYTRANSFER,true);//二进制流 curl_setopt($ch, CURLOPT_POSTFIELDS, $data); //数据 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //当CURLOPT_RETURNTRANSFER设置为1时 $head 有请求的返回值 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout); //设置请求超时时间 $handles = curl_exec($ch); curl_close($ch); return $handles; }对方是java服务器,我只知道接口,并不知道对方如何处理文件接收的。上面这种方式在win7 wamp环境下是成功的,但是将代码放到centOS+Nginx服务器上却失败,返回的消息是文件接收失败。经过抓包分析,发现在win7 wamp下发的包和centos nginx下发的http包格式有区别。一般情况下curl默认把content_type设为了multipart/form-data,在我的机器上win7 wamp下是如此,但是centos nginx下却是application/x-www-form-urlencoded。当然这也可能是服务器配置问题,只是我并不知道问题在哪。然后我又查看了下PHP版本,同是PHP5.3.X,但是有细微差别。也不排除是PHP版本的问题。之后添加代码:
$header = array( 'Content-Type: multipart/form-data', ); curl_setopt( $ch, CURLOPT_HTTPHEADER, $header);设置header,但是在centos下依旧无效。居然无法改变content-type,简直坑爹。
后来在技术总监的帮助下,看了PHP官方网站上的一个链接http://php.net/manual/en/class.curlfile.php,参照官网做法在win wamp和centos nginx下post请求都成功了。仔细阅读了代码,发现做法竟是完整的书写了http请求的body部分,而不用curl自己生成的部分,不得不佩服。下面放出代码:
function postData($url, $data = array(), $data1 = array()){ $header = array( 'Content-Type: multipart/form-data', ); $ch = curl_init(); curl_setopt ($ch, CURLOPT_URL, $url); curl_setopt( $ch, CURLOPT_HTTPHEADER, $header); curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT,10); curl_setopt ($ch, CURLOPT_BINARYTRANSFER,true); //curl_setopt ($ch, CURLOPT_POSTFIELDS, $data); curl_custom_postfields($ch, $data, $data1); $dxycontent = curl_exec($ch); curl_close($ch); return $dxycontent; } /** * For safe multipart POST request for PHP5.3 ~ PHP 5.4. * * @param resource $ch cURL resource * @param array $assoc name => value * @param array $files name => path * @return bool */ function curl_custom_postfields($ch, array $assoc = array(), array $files = array()) { // invalid characters for name and filename static $disallow = array(, , , ); // build normal parameters foreach ($assoc as $k => $v) { $k = str_replace($disallow, _, $k); $body[] = implode( , array( Content-Disposition: form-data; name={$k}, , filter_var($v), )); } // build file parameters foreach ($files as $k => $v) { switch (true) { case false === $v = realpath(filter_var($v)): case !is_file($v): case !is_readable($v): continue; // or return false, throw new InvalidArgumentException } $data = file_get_contents($v); $v = call_user_func(end, explode(DIRECTORY_SEPARATOR, $v)); $k = str_replace($disallow, _, $k); $v = str_replace($disallow, _, $v); $body[] = implode( , array( Content-Disposition: form-data; name={$k}; filename={$v}, Content-Type: application/octet-stream, , $data, )); } // generate safe boundary do { $boundary = --------------------- . md5(mt_rand() . microtime()); } while (preg_grep(/{$boundary}/, $body)); // add boundary for each parameters array_walk($body, function (&$part) use ($boundary) { $part = --{$boundary} {$part}; }); // add final boundary $body[] = --{$boundary}--; $body[] = ; // set options return @curl_setopt_array($ch, array( CURLOPT_POST => true, CURLOPT_POSTFIELDS => implode( , $body), CURLOPT_HTTPHEADER => array( Expect: 100-continue, Content-Type: multipart/form-data; boundary={$boundary}, // change Content-Type ), )); }参数传递无影响,若是文件则在绝对路径前+@。唯一的区别就是将文件数据和普通数据用不同的数组区分开来,在模拟http的body部分时对其进行不同的处理。最终成功上传文件。

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