Question

我正在尝试使用GDrive REST API .v3导出Google表格并将其保存到Excel格式（实际上是Open Office MIME类型）的本地文件系统中，但无济于事。

我也尝试使用直接链接：

string path1 = "https://drive.google.com/file/d/" + fileId + "/edit?usp=sharing"; //DOESN'T WORK; EXPECTED
string path2 = "https://drive.google.com/uc?export=download&id=" + fileId; //FILE NOT FOUND
string path3 = "https://drive.google.com/open?id=" + fileId; //DOWNLOADS A MESS
string path4 = "https://www.googleapis.com/drive/v3/files/" + fileId + "?alt=media"; //Google API: The remote server returned an error: (403) Forbidden.
WebClient oClient = new WebClient();
oClient.DownloadFile(path4, saveAs);
result = path4;

AND ...

var webcontentlink = "https://drive.google.com/uc?export=download&id=" + fileId;
Google.Apis.Drive.v3.Data.File file = 
driveService.Files.Get(fileId).Execute();
var x = driveService.HttpClient.GetByteArrayAsync(webcontentlink);
byte[] arrBytes = x.Result;
File.WriteAllBytes(saveAs, arrBytes);

这是我想要工作的代码：

//GET THE MIME TYPE OF THE GOOGLE FILE
Google.Apis.Drive.v3.Data.File oFile = 
driveService.Files.Get(fileId).Execute();
string mimeType = oFile.MimeType;
bool googleDoc = true;

switch (mimeType) {
    case "application/vnd.google-apps.document": {
        mimeType = "application/vnd.oasis.opendocument.text";
        break;
    }
case "application/vnd.google-apps.spreadsheet": {
        mimeType = "application/x-vnd.oasis.opendocument.spreadsheet";
        break;
    }
case "application/vnd.google-apps.drawing": {
        mimeType = "image/png";
        break;
    }
case "application/vnd.google-apps.presentation": {
        mimeType = "application/pdf";
        break;
    }
default: {
        googleDoc = false;
        break;
    }
}
var oRequest = driveService.Files.Export(fileId, mimeType);
oRequest.Fields = "*";
MemoryStream stream = new MemoryStream();
oRequest.MediaDownloader.ProgressChanged += (IDownloadProgress progress) => 
{
    switch (progress.Status) {
        case DownloadStatus.Downloading: {
                result = progress.BytesDownloaded.ToString();
                break;
            }
        case DownloadStatus.Completed: {
                result = "Export complete.";
                break;
            }
        case DownloadStatus.Failed: {
                result = "Export failed.";
                break;
            }
    }
};
oRequest.Download(stream);
SaveStream(stream, saveAs);

private static void SaveStream(MemoryStream stream, string saveAs) {
    //PURPOSE: SAVE THE FILE STREAM TO A FILE.
    using (FileStream file = new FileStream(saveAs, FileMode.Create, FileAccess.Write)) {
        stream.CopyTo(file);
    }
}

API示例代码显示为“下载完成”，但是文件内容显示为乱码或空白。我具有正确的MIME类型等，并尝试了几种不同的方法。我希望能够成功地从GDrive导出文件，最好至少将Google表格导出到Excel。这是一个很受欢迎的问题，但似乎没人回答...

Answer 1

问题是文档（Download Files Guide ）中列出的MIME类型不起作用。我确实找到了可以正常工作的MIME类型。以下是测试各种可能的MIME转换类型的详细信息（请参阅每行的注释）：

Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details.

使用GDrive API .v3将Google表格导出到Excel时出现问题

1 个答案: