带文件附件的 PHP Curl 帖子；自定义内容类型标头

我必须将文件连同一些发布参数一起发布到服务器。我从该服务器管理员收到的文档显示了发布请求应该是什么样子的示例（*请注意 POST“multipart/x-api-remote-integration”的自定义内容类型）：

POST /gateway/remote_send HTTP/1.0

Content-Type: multipart/x-api-remote-integration; boundary=ABC1234

Content-Length: 323

--ABC1234

Content-Type: application/x-www-form-urlencoded

profile_name=username&profile_pw=password1234&attached_type=action_1

--ABC1234

Content-Type: text/csv

Content-Disposition: attachment; filename="attachment.csv"
row1
row2
row3

--ABC1234--

下面是php代码：

<?php
function post(){
    $base_api_url = "https://hostserver.com/gateway/remote_send";

    $filename = realpath("/home/username/tests/test1234qwerty.csv");

    $payload['profile_name'] = "username";
    $payload['profile_pw'] = 'password1234';
    $payload['attached_type'] = 'action_1';
    $payload['filename'] = "@" . $filename . ";type=text/csv;";

    $curl_options = array(
        CURLOPT_URL => $base_api_url,
        CURLOPT_POST => true,
        CURLOPT_POSTFIELDS => http_build_query( $payload ),
        CURLOPT_HTTP_VERSION  => 1.0,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_VERBOSE => true,
        CURLOPT_HEADER => false,
    );

    $curl = curl_init();
    curl_setopt_array( $curl, $curl_options );
    $result = curl_exec( $curl );
    curl_close ($curl);
    echo $result;
  }

post();

从我从服务器收到的信息来看，似乎帖子字段已被正确接收。然而，这是未收到的文件。我不确定我做错了什么。任何意见都将受到高度赞赏。

编辑：附加详细响应：

* About to connect() to hostserver.com port 443 (#0)
*   Trying x.x.x.x... * connected
* successfully set certificate verify locations:
*   CAfile: none
  CApath: /etc/ssl/certs
* SSL connection using DHE-RSA-AES256-SHA
*   ******** REDACTED ************
*   SSL certificate verify ok.
> POST /gateway/remote_send HTTP/1.0
Host: hostserver.com
Accept: */*
Content-Length: 110
Content-Type: application/x-api-remote-integration

* upload completely sent off: 110out of 110 bytes
< HTTP/1.1 200 OK
< Date: Mon, 19 Aug 2013 16:00:38 GMT
< Server: Apache/2.2.15 (Red Hat)
< Pragma: no-cache
< CacheControl: no-cache
< Cache-Control: no-cache
< Expires: -1
< Connection: close
< Content-Type: multipart/x-api-remote-integration; boundary=remote_send-52124126
<
* Closing connection #0
HTTP/1.1 200 OK
Date: Mon, 19 Aug 2013 16:00:38 GMT
Server: Apache/2.2.15 (Red Hat)
Pragma: no-cache
CacheControl: no-cache
Cache-Control: no-cache
Expires: -1
Connection: close
Content-Type: multipart/x-vcg-remote-api; boundary=remote_send-52124126

--remote_send-52124126
Content-Type: application/x-www-form-urlencoded

result=invalid_filename
--remote_send-52124126--

我知道服务器正在正确读取用户名和密码数据，因为我已经使用错误信息进行了测试并收到了凭据错误。

当您告诉 cURL 上传文件时，Content-Type标题自动设置为multipart/form-data。对于文档中的请求，您必须手动上传文件。

<?php
$url     = 'https://hostserver.com/gateway/remote_send';
$payload = array(
    'profile_name'  => 'username',
    'profile_pw'    => 'password1234',
    'attached_type' => 'action_1'
);
$file = realpath('/home/username/tests/test1234qwerty.csv');

// build multipart
$payload = http_build_query($payload);
$params  = "--ABC1234\r\n"
    . "Content-Type: application/x-www-form-urlencoded\r\n"
    . "\r\n"
    . $payload . "\r\n"
    . "--ABC1234\r\n"
    . "Content-Type: text/csv\r\n"
    . "Content-Disposition: attachment; filename=\"attachment.csv\"\r\n"
    . "\r\n"
    . file_get_contents($file) . "\r\n"
    . "--ABC1234--";

$first_newline      = strpos($params, "\r\n");
$multipart_boundary = substr($params, 2, $first_newline - 2);
$request_headers    = array();
$request_headers[]  = 'Content-Length: ' . strlen($params);
$request_headers[]  = 'Content-Type: multipart/x-api-remote-integration; boundary='
    . $multipart_boundary;

// send the request now

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
curl_setopt($ch, CURLOPT_HTTPHEADER, $request_headers);

$reply = curl_exec($ch);

那样有用吗？