在PHP中使用cURL发布文件字符串？

Question

我想知道当文件只是一个字符串时，是否可以发布文件以及其他表单数据？

我知道您可以通过在文件路径前加“@”来发布已经在文件系统上的文件。

但是我想绕过创建一个临时文件并只发送文件作为字符串，但我不确定如何使用PHP中的cURL构造请求。

干杯

$postFields = array(
     'otherFields' => 'Yes' 
     ,'filename'  => 'my_file.csv' 
     ,'data'   => 'comma seperated content' 
    ); 

    $options = array(
     CURLOPT_RETURNTRANSFER => true 
     ,CURLOPT_SSL_VERIFYPEER => false 
     ,CURLOPT_SSL_VERIFYHOST => 1 
     ,CURLOPT_POSTFIELDS  => $postFields 
     ,CURLOPT_HTTPHEADER  => array(
      'Content-type: multipart/form-data' 
     ) 
    ); 

Answer 1

应该是可能的：这里的一种形式，通过浏览器发布（不相关的领域略）：

POST http://host.example.com/somewhere HTTP/1.1 
Content-Type: multipart/form-data; boundary=---------------------------7da16b2e4026c 
Content-Length: 105732 

-----------------------------7da16b2e4026c 
Content-Disposition: form-data; name="NewFile"; filename="test.jpg" 
Content-Type: image/jpeg 

(...raw JPEG data here...) 
-----------------------------7da16b2e4026c 
Content-Disposition: form-data; name="otherformfield" 

content of otherformfield is this text 
-----------------------------7da16b2e4026c-- 

所以，如果我们建立了POST正文自己和设置额外的头部或两个，我们应该能够模拟这个：

// form field separator 
$delimiter = '-------------' . uniqid(); 
// file upload fields: name => array(type=>'mime/type',content=>'raw data') 
$fileFields = array(
    'file1' => array(
     'type' => 'text/plain', 
     'content' => '...your raw file content goes here...' 
    ), /* ... */ 
); 
// all other fields (not file upload): name => value 
$postFields = array(
    'otherformfield' => 'content of otherformfield is this text', 
    /* ... */ 
); 

$data = ''; 

// populate normal fields first (simpler) 
foreach ($postFields as $name => $content) { 
    $data .= "--" . $delimiter . "\r\n"; 
    $data .= 'Content-Disposition: form-data; name="' . $name . '"'; 
    // note: double endline 
    $data .= "\r\n\r\n"; 
} 
// populate file fields 
foreach ($fileFields as $name => $file) { 
    $data .= "--" . $delimiter . "\r\n"; 
    // "filename" attribute is not essential; server-side scripts may use it 
    $data .= 'Content-Disposition: form-data; name="' . $name . '";' . 
      ' filename="' . $name . '"' . "\r\n"; 
    // this is, again, informative only; good practice to include though 
    $data .= 'Content-Type: ' . $file['type'] . "\r\n"; 
    // this endline must be here to indicate end of headers 
    $data .= "\r\n"; 
    // the file itself (note: there's no encoding of any kind) 
    $data .= $file['content'] . "\r\n"; 
} 
// last delimiter 
$data .= "--" . $delimiter . "--\r\n"; 

$handle = curl_init($url); 
curl_setopt($handle, CURLOPT_POST, true); 
curl_setopt($handle, CURLOPT_HTTPHEADER , array(
    'Content-Type: multipart/form-data; boundary=' . $delimiter, 
    'Content-Length: ' . strlen($data))); 
curl_setopt($handle, CURLOPT_POSTFIELDS, $data); 
curl_exec($handle); 

这样，我们正在做他所有的他狂热自己，相信cURL不会破坏它。

Answer 2

php有权访问一个临时位置“php：// memory”，这实际上使得你想要做的事情变得相当容易。

$fh = fopen('php://memory','rw'); 
fwrite($fh, $content); 
rewind($fh); 

$options = array(
    CURLOPT_RETURNTRANSFER => true 
    ,CURLOPT_SSL_VERIFYPEER => false 
    ,CURLOPT_SSL_VERIFYHOST => 1 
    ,CURLOPT_HTTPHEADER  => array(
     'Content-type: multipart/form-data' 
    ) 
    ,CURLOPT_INFILE   => $fh 
    ,CURLOPT_INFILESIZE  => strlen($content) 
);