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我正在使用 google drive API 和示例 DrEdit 项目，我想将挑选的 pdf 文件保存到本地目录中。我目前的步骤

  1. 我正在使用 DownloadFile 方法获取文件内容流

    public static string DownloadFile(IAuthenticator auth, String downloadUrl)
{
    string result = "";
    try
    {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(downloadUrl));
        auth.ApplyAuthenticationToRequest(request);

        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        System.IO.Stream stream = response.GetResponseStream();
        StreamReader reader = new StreamReader(stream);
        return reader.ReadToEnd();
    }
    catch (Exception e)
    {
        Console.WriteLine("An error occurred: " + e.Message);
    }
    return result;
}

  2. 然后我将其转换为 byte[] 并尝试保存：

    public static string SaveFileToTmpDir(byte[] fileBytes, string fileName)
{
    fileName = Path.Combine(Environment.GetEnvironmentVariable("temp"), fileName);
    using (FileStream fs = File.Create(fileName, fileBytes.Length, FileOptions.Asynchronous))
    {
        fs.Write(fileBytes, 0, fileBytes.Length);
    }           
    return fileName;
}

  3. 这是我的操作->我正在从视图中调用该操作->将文件保存在 tmp 目录中并返回保存文件的路径：

    [HttpPost]
public JsonResult loadFile(string id)
{
    IAuthenticator authenticator = Session["authenticator"] as IAuthenticator;
    DriveService service = Session["service"] as DriveService;

    if (authenticator == null || service == null)
    {
        Response.Redirect(Utils.GetAuthorizationUrl("", ""));
    }

    Google.Apis.Drive.v2.Data.File file = service.Files.Get(id).Fetch();
    string fileStream = Utils.DownloadFile(authenticator, file.DownloadUrl);
    string filePath = Utils.SaveFileToTmpDir(StrToByteArray(fileStream), file.Title);
    return Json(new { filePath = filePath });
}

但在这样做之后，我得到 pfd 文件完全空白。有什么想法可以得到准确的副本吗？

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0 回答 0