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;
- }
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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, $header);
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设置header,但是在centos下依旧无效。居然无法改变content-type,简直坑爹。
后来在技术总监的帮助下,看了PHP官方网站上的一个链接http://php.net/manual/en /class.curlfile.php,参照官网做法在win wamp和centos nginx下post请求都成功了。仔细阅读了代码,发现做法竟是完整的书写了http请求的body部分,而不用curl自己生成的部分,不得不佩服。 下面放出代码:
- function postData($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 $disallow = array("\0", "\"", "\r", "\n");
-
- // build normal parameters
- foreach ($assoc as $k => $v) {
- $k = str_replace($disallow, "_", $k);
- $body[] = implode("\r\n", array(
- "Content-Disposition: form-data; name=\"{$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);
- $body[] = implode("\r\n", array(
- "Content-Disposition: form-data; name=\"{$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}\r\n{$part}";
- });
-
- // add final boundary
- $body[] = "--{$boundary}--";
- $body[] = "";
-
- // set options
- return @curl_setopt_array($ch, array(
- CURLOPT_POST => true,
- CURLOPT_POSTFIELDS => implode("\r\n", $body),
- CURLOPT_HTTPHEADER => array(
- "Expect: 100-continue",
- "Content-Type: multipart/form-data; boundary={$boundary}", // change Content-Type
- ),
- ));
- }
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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。 |