在Windows Store App中将文件上传/下载到Google云端硬盘

Question

I am able to sign into Google using the web authentication sample . Here's the code:

    private async void Launch_Click(object sender, RoutedEventArgs e) 
    {    
        if(GoogleClientID.Text == "") 
        { 
            rootPage.NotifyUser("Please enter an Client ID.", NotifyType.StatusMessage); 
        } 
        else if(GoogleCallbackUrl.Text == "") 
        { 
            rootPage.NotifyUser("Please enter an Callback URL.", NotifyType.StatusMessage); 
        } 

        try 
        { 
            String GoogleURL = "https://accounts.google.com/o/oauth2/auth?client_id=" + Uri.EscapeDataString(GoogleClientID.Text) + "&redirect_uri=" + Uri.EscapeDataString(GoogleCallbackUrl.Text) + "&response_type=code&scope=" + Uri.EscapeDataString("http://picasaweb.google.com/data"); 

            System.Uri StartUri = new Uri(GoogleURL); 
            // When using the desktop flow, the success code is displayed in the html title of this end uri 
            System.Uri EndUri = new Uri("https://accounts.google.com/o/oauth2/approval?"); 

            DebugPrint("Navigating to: " + GoogleURL); 

            WebAuthenticationResult WebAuthenticationResult = await WebAuthenticationBroker.AuthenticateAsync( 
                                                    WebAuthenticationOptions.UseTitle, 
                                                    StartUri, 
                                                    EndUri); 
            if (WebAuthenticationResult.ResponseStatus == WebAuthenticationStatus.Success) 
            { 
                OutputToken(WebAuthenticationResult.ResponseData.ToString()); 
            } 
            else if (WebAuthenticationResult.ResponseStatus == WebAuthenticationStatus.ErrorHttp) 
            { 
                OutputToken("HTTP Error returned by AuthenticateAsync() : " + WebAuthenticationResult.ResponseErrorDetail.ToString()); 
            } 
            else 
            { 
                OutputToken("Error returned by AuthenticateAsync() : " + WebAuthenticationResult.ResponseStatus.ToString()); 
            } 
        } 
        catch (Exception Error) 
        { 
            // 
            // Bad Parameter, SSL/TLS Errors and Network Unavailable errors are to be handled here. 
            // 
            DebugPrint(Error.ToString()); 
        } 
}       

After the app authenticates, I'm not sure how to go about using file operations. Their is a .Net library that Google has made available but it doesn't seem to work for Windows store apps.

Here is the doc upload files over http:

Google Drive api: https://developers.google.com/drive/manage-uploads

I tried using the HttpClient sample but wasn't sure how to use the authentication token that I got from the authentication sample.

Answer 1

It looks like you'd be best served using the BackgroundUploader class in WinRT, and then putting your auth token into the Authorization header using the SetRequestHeader method. The BackgroundUploader should handle the parts of your file (based on the Google Drive documentation and the MSDN docs) so with the headers and method below, I think that's all you need.

POST /upload/drive/v2/files?uploadType=media HTTP/1.1
Host: www.googleapis.com
Content-Type: image/jpeg
Content-Length: {number_of_bytes_in_JPEG_file}
Authorization: {your_auth_token}

{JPEG data}

For smaller file types, you should be able to do something similar with System.Net.HttpClient - here is a post about setting headers on that type.