正在尝试将从 google 驱动器接收到的原始数据保存到服务器

Question

我正在制作服务，它允许从用户的 Google 驱动器中选择一些 pdf 文件，然后脚本将文件转换为 jpg。我无法从 Google 驱动器下载文件。

我正在获取这样的文件数据：

function step3process()
{
    $("#content").empty();
    var pdf = checkedPdf[downloadedCnt];
    var i = downloadedCnt;
            gapi.client.request({
                'path': '/drive/v2/files/'+pdf,
                'method': 'GET',
                callback: function ( theResponseJS, theResponseTXT ) {
                    var myToken = gapi.auth.getToken();
                    var myXHR   = new XMLHttpRequest();
                    myXHR.open('GET', theResponseJS.downloadUrl, true );
                    myXHR.setRequestHeader('Authorization', 'Bearer ' + myToken.access_token );
                    myXHR.onreadystatechange = function( theProgressEvent ) {
                        if (myXHR.readyState == 4) {

                            if ( myXHR.status == 200 ) {


                                var rawcont = utf8_to_b64(myXHR.response);

                                $.ajax({
                                        type: "POST",
                                        beforeSend: function(req) {
                                            req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
                                        },
                                        url: './savepdf.php',
                                        data: rawcont,
                                        dataType: "json"
                                    }

                                ).done(
                                    function (msg) {
                                        downloadedCnt++;
                                        console.log("Скачан файл " + msg.name + " Всего скачано " + downloadedCnt + " из " + checkedPdf.length);
                                        if (downloadedCnt < checkedPdf.length) step3process();
                                    }
                                );
                            }
                        }
                    };
                    myXHR.send();


                }
            });


}

服务器端看起来像：

if (isset($_POST))
{
    $pdfData = '';
    foreach($_POST as $p)
    {
        $pdfData .= $p;
    }
    $filteredData = $pdfData;

    $unencodedData = urldecode(base64_decode($filteredData));
    $fp = fopen($filepath, "w");
    fwrite($fp, $unencodedData);
    fclose($fp);
    echo("{\"answer\": \"ok\", \"name\": \"{$filepath}\", \"length\": \"" . strlen($unencodedData) . "\" }");

}

毕竟，我得到的是这样的空 pdf： upload result example

我也注意到了，原来的pdf文件和下载的有一些不同，这里是例子： files in mcedit

我的解决方案是，如果我可以获得包含内容的 pdf 文件。提前Tnx.

Answer 1

最后，我向 php 提供了令牌：

                    $.ajax({
                        type: "POST",
                        url: './downloadpdf.php',
                        data: "url="+ encodeURIComponent(downUrl) + "&name="+ encodeURIComponent(pdfNames[pdf]) +"&token=" + myToken.access_token,
                        dataType: "json"
                    }).done();

并使用 php 轻松下载文件：

$url = urldecode($_POST['url']);
$name = urldecode($_POST['name']);
$token = $_POST['token'];


$ch = curl_init();

curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Authorization: Bearer '.$token
));

$filepath = "./pdf/{$name}";

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);

// grab URL
$pdf = curl_exec($ch);
curl_close($ch);

file_put_contents($filepath,$pdf);

还是不懂，为什么不能保存原始数据。希望这对某些人有所帮助1

正在尝试将从 google 驱动器接收到的原始数据保存到服务器

Trying to save raw data, which has been received from google drive, to server

google-drive-api