PHP Curl在标题中发送内容长度不起作用

Question

我正在使用 Curl 将照片上传到实际站点。我可以从 Fiddler 看到标头是这样的：

Host: test.example.com
Proxy-Connection: keep-alive
Data-Type: json
Accept-Encoding: gzip, deflate
Content-Length: 62601
Content-Type: application/json
Accept-Language: en-us
Accept: application/json
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2049.0 Safari/537.36

我正在使用与上面完全相同的标题。我正在使用filesize 获得content-length 的值

   $file = 'test.jpg';
   $file_size = filesize($file);

    $headers = array(
                "Host: test.example.com",
                "Proxy-Connection: keep-alive",
                "Data-Type: json",
                "Accept-Encoding: gzip, deflate",
                "Content-length: $file_size",
                "Content-Type: application/json",       
                "Accept-Language: en-us",
                "Connection: keep-alive",
                "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2049.0 Safari/537.36",
            );

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); 
$result = curl_exec($ch);

我实际上并不需要标头，脚本通常在没有标头的情况下也可以工作，但它经常失败，为了解决问题，我将标头放入。

除content-length 外，所有标题都可以正常工作。当我把它放进去时，我收到来自服务器的响应，表明命令格式不正确（我无法在此处显示实际响应）。我对content-length 不太了解，但我相信这会告诉服务器文件的大小，并帮助它确定上传是否完成。我认为如果我能正常工作，它会增加我的脚本的稳定性。

我将不胜感激。

Answer 1

如果您要使用 curl 发送文件，请将完整的 filePath 放在 @ 前面，然后 curl 将处理其余部分。

$headers = array(
        "Proxy-Connection: keep-alive",
        "Data-Type: json",
        "Accept-Encoding: gzip, deflate",
        "Content-Type: application/json",       
        "Accept-Language: en-us",
        "Connection: keep-alive",
    );
$data = array(
    'fieldForFile' => '@'.  $filePath //Don't forget @ and the complete file path to the file
    'anyOtherFields' => $value,


);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, 1);
// Use CURLOPT_USERAGENT for setting the user agent
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2049.0 Safari/537.36");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $POST_DATA);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); 
$response = curl_exec($ch);

// Error handling
if($errno = curl_errno($ch)) {
    $error_message = curl_strerror($errno);
    echo "cURL error ({$errno}):\n {$error_message}";
} else {
    echo "Success";
}

curl_close ($ch);