php模拟post请求发送文件代码

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：

1. $params1 = "test";
2. $params2 = "@".$absolute_path;//如果是文件 则参数为"@"+绝对路径
3. $post_data = array(
4. 'params1' => $params1,
5. 'params2' => $params2,
6. );
7. function postData($url, $data){
8. $ch = curl_init();
9. $timeout = 300;
10. curl_setopt($ch, CURLOPT_URL, $url); //请求地址
11. //curl_setopt($ch, CURLOPT_REFERER, $ip);//构造来路
12. curl_setopt($ch, CURLOPT_POST, true); //post请求
13. curl_setopt($ch, CURLOPT_BINARYTRANSFER,true);//二进制流
14. curl_setopt($ch, CURLOPT_POSTFIELDS, $data); //数据
15. curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //当CURLOPT_RETURNTRANSFER设置为1时 $head 有请求的返回值
16. curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout); //设置请求超时时间
17. $handles = curl_exec($ch);
18. curl_close($ch);
19. return $handles;
20. }

1. $header = array(
2. 'Content-Type: multipart/form-data',
3. );
4. curl_setopt( $ch, CURLOPT_HTTPHEADER, $header);

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.com/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：

1. function postData($url, $data = array(), $data1 = array()){
2. $header = array(
3. 'Content-Type: multipart/form-data',
4. );
5. $ch = curl_init();
6. curl_setopt ($ch, CURLOPT_URL, $url);
7. curl_setopt( $ch, CURLOPT_HTTPHEADER, $header);
8. curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
9. curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT,10);
10. curl_setopt ($ch, CURLOPT_BINARYTRANSFER,true);
11. //curl_setopt ($ch, CURLOPT_POSTFIELDS, $data);
12. curl_custom_postfields($ch, $data, $data1);
13. $dxycontent = curl_exec($ch);
14. curl_close($ch);
15. return $dxycontent;
16. }
18. /**
19. * For safe multipart POST request for PHP5.3 ~ PHP 5.4.
20. *
21. * @param resource $ch cURL resource
22. * @param array $assoc "name => value"
23. * @param array $files "name => path"
24. * @return bool
25. */
26. function curl_custom_postfields($ch, array $assoc = array(), array $files = array()) {
27. // invalid characters for "name" and "filename"
28. static $disallow = array("\0", "\"", "\r", "\n");
30. // build normal parameters
31. foreach ($assoc as $k => $v) {
32. $k = str_replace($disallow, "_", $k);
33. $body[] = implode("\r\n", array(
34. "Content-Disposition: form-data; name=\"{$k}\"",
35. "",
36. filter_var($v),
37. ));
38. }
40. // build file parameters
41. foreach ($files as $k => $v) {
42. switch (true) {
43. case false === $v = realpath(filter_var($v)):
44. case !is_file($v):
45. case !is_readable($v):
46. continue; // or return false, throw new InvalidArgumentException
47. }
48. $data = file_get_contents($v);
49. $v = call_user_func("end", explode(DIRECTORY_SEPARATOR, $v));
50. $k = str_replace($disallow, "_", $k);
51. $v = str_replace($disallow, "_", $v);
52. $body[] = implode("\r\n", array(
53. "Content-Disposition: form-data; name=\"{$k}\"; filename=\"{$v}\"",
54. "Content-Type: application/octet-stream",
55. "",
56. $data,
57. ));
58. }
60. // generate safe boundary
61. do {
62. $boundary = "---------------------" . md5(mt_rand() . microtime());
63. } while (preg_grep("/{$boundary}/", $body));
65. // add boundary for each parameters
66. array_walk($body, function (&$part) use ($boundary) {
67. $part = "--{$boundary}\r\n{$part}";
68. });
70. // add final boundary
71. $body[] = "--{$boundary}--";
72. $body[] = "";
74. // set options
75. return @curl_setopt_array($ch, array(
76. CURLOPT_POST => true,
77. CURLOPT_POSTFIELDS => implode("\r\n", $body),
78. CURLOPT_HTTPHEADER => array(
79. "Expect: 100-continue",
80. "Content-Type: multipart/form-data; boundary={$boundary}", // change Content-Type
81. ),
82. ));
83. }