DropBox API应用程序/八位字节流头 [英] DropBox API application/octet-stream header

问题描述

我正在尝试使用PHP向Dropbox API发出cUrl请求，以便开始上传非常大的zip文件。这是我要实施的文档，位于 https：/ /www.dropbox.com/developers/documentation/http/documentation#files-upload -

I'm attempting to make a cUrl request with PHP to the Dropbox API, in order to begin to upload a very large zip file. Here is the documentation I'm trying to implement, found at https://www.dropbox.com/developers/documentation/http/documentation#files-upload -

URL结构： https://content.dropboxapi.com/2/files/upload_session/start

示例网址请求：

curl -X POST https://content.dropboxapi.com/2/files/upload_session/start \
    --header "Authorization: Bearer <get access token>" \
    --header "Dropbox-API-Arg: {\"close\": false}" \
    --header "Content-Type: application/octet-stream" \
    --data-binary @local_file.txt

这是我的代码：

$uploads = wp_upload_dir();
$file = $uploads['basedir']."/maintainme/backups/files/backup_".$filename.'/'.$filename.'.zip';
$ch = curl_init();
$url = 'https://content.dropboxapi.com/2/files/upload_session/start';
$headers = array(
    'Authorization: Bearer ' .$dropbox_token,
    'Dropbox-API-Arg: {\"close\": false}',
    'Content-Type: application/octet-stream',
);
$fields = array('file' => '@' . $file);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields ); 
curl_setopt($ch, CURLOPT_VERBOSE, 1);
$result = curl_exec($ch);
curl_close($ch);

我收到的错误消息是：

对API函数文件/上传会话/启动的调用错误：错误的HTTP内容类型标头：应用程序/八位字节流；边界= ----------------- ------- 1ee7d00b0e9b0c47。期望应用程序/八位字节流，文本/纯文本； charset = dropbox-cors-hack之一。

Error in call to API function "files/upload_session/start": Bad HTTP "Content-Type" header: "application/octet-stream; boundary=------------------------1ee7d00b0e9b0c47". Expecting one of "application/octet-stream", "text/plain; charset=dropbox-cors-hack".

似乎这个边界=-每当我尝试发出此请求时，------------等等。谁有想法？？？谢谢！

It seems that this 'Boundary=------------blahblahblah' gets appended to my content-type header each time I try to make this request. Anyone have any ideas??? Thanks!

推荐答案

解决了！一时兴起，我检查了位于 http：//上的 CURLOPT_POSTFIELDS选项php.net/manual/en/function.curl-setopt.php ，下面是它的意思：

Solved it! On a whim, I checked into the 'CURLOPT_POSTFIELDS' option found at http://php.net/manual/en/function.curl-setopt.php, and here's what it said:

完整数据以HTTP POST操作进行发布。要发布文件，请在文件名前添加@并使用完整路径。可以通过在文件名后加上类型; type = mimetype的类型来明确指定文件类型。该参数既可以作为uraracoded字符串（如 para1 = val1& para2 = val2& ...）传递，也可以作为字段名称作为键并将字段数据作为值的数组传递。 如果value是一个数组，则Content-Type标头将设置为multipart / form-data 。从PHP 5.2.0开始，如果使用@前缀将文件传递给此选项，则value必须是一个数组。从PHP 5.5.0开始，不赞成使用@前缀，并且可以使用CURLFile发送文件。通过将CURLOPT_SAFE_UPLOAD选项设置为TRUE，可以禁用@前缀以安全地传递以@开头的值。

The full data to post in a HTTP "POST" operation. To post a file, prepend a filename with @ and use the full path. The filetype can be explicitly specified by following the filename with the type in the format ';type=mimetype'. This parameter can either be passed as a urlencoded string like 'para1=val1&para2=val2&...' or as an array with the field name as key and field data as value. If value is an array, the Content-Type header will be set to multipart/form-data. As of PHP 5.2.0, value must be an array if files are passed to this option with the @ prefix. As of PHP 5.5.0, the @ prefix is deprecated and files can be sent using CURLFile. The @ prefix can be disabled for safe passing of values beginning with @ by setting the CURLOPT_SAFE_UPLOAD option to TRUE.

相关部分以粗体显示在以上段落中。显然，将数组传递给CURLOPT_POSTFIELDS选项是在内容类型后附加 Boundary = ---- blahblahblah，并导致API调用失败的原因。我更改了

The relevant part is bolded in the paragraph above. Apparently passing an array to the CURLOPT_POSTFIELDS option is what was appending that 'Boundary=----blahblahblah' the Content-Type and causing the API call to fail. I changed

curl_setopt($ch, CURLOPT_POSTFIELDS, $fields );

到

curl_setopt($ch, CURLOPT_POSTFIELDS, '@'.$file );

并再次尝试。最初的问题已解决，但是我在此部分代码中遇到了 Dropbox-API-Arg行的新问题：

and tried again. The initial issue was fixed, but I then encountered a new issue with the 'Dropbox-API-Arg' line in this section of code:

$headers = array(
    'Authorization: Bearer ' .$dropbox_token,
    'Dropbox-API-Arg: {\"close\": false}',
    'Content-Type: application/octet-stream',
);

结果是，这些参数需要正确进行JSON编码。我是使用以下代码完成此操作的：

Turns out, these arguments need to be properly JSON-Encoded. I did this with the code below:

$args = array('close'=>false);
$args = json_encode($args);

然后更改

'Dropbox-API-Arg: {\"close\": false}' 

至：

'Dropbox-API-Arg:'.$args

这是完整的最终代码：

    $uploads = wp_upload_dir();
    $file = $uploads['basedir']."/maintainme/backups/files/backup_".$filename.'/'.$filename.'.zip';
    error_log($file);

    $args = array('close'=>false);
    $args = json_encode($args);

    $ch = curl_init();
    $url = 'https://content.dropboxapi.com/2/files/upload_session/start';
    $headers = array(
        'Authorization: Bearer ' .$dropbox_token,
        'Dropbox-API-Arg:'.$args,
        'Content-Type: application/octet-stream',
    );
    $fields = array('file' => '@' . $file);
    error_log($fields);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_POSTFIELDS, '@'.$file ); 
    curl_setopt($ch, CURLOPT_VERBOSE, 1);
    $result = curl_exec($ch);
    error_log($result);
    curl_close($ch);

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