如果此问题之前已得到解答,我很遗憾,但没有任何答案对我有帮助。我有一个事件对我的WebView:挂在较大文件上的HttpClient getAsync
private async void MainWebView_UnviewableContentIdentified(WebView sender, WebViewUnviewableContentIdentifiedEventArgs args)
{
await downloadFromUri(args.Uri).ConfigureAwait(false);
}
我downloadFromUri方法会尝试下载一个文件,并将其存储在下载文件夹,最后它会打开文件:
static async Task downloadFromUri(Uri uri)
{
var url = uri;
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.TryAppendWithoutValidation(
"Authorization Bearer",
" MYTOKEN"
);
Debug.WriteLine("Attempting GET request");
var response = await client.GetAsync(url);
Debug.WriteLine("Got response.. checking " + response.StatusCode);
if (response.IsSuccessStatusCode)
{
Debug.WriteLine("Okay, we've got a response");
var responseFileName = response.Content.Headers.ContentDisposition.FileName;
Debug.WriteLine("Filename: " + responseFileName);
var ManualFile = await DownloadsFolder.CreateFileAsync(responseFileName, CreationCollisionOption.GenerateUniqueName);
Debug.WriteLine("Creating buffer: ");
var buffer = await client.GetBufferAsync(url);
Debug.WriteLine("Writing buffer.");
await Windows.Storage.FileIO.WriteBufferAsync(ManualFile, buffer);
Debug.WriteLine("Done, opening");
var openOptions = new Windows.System.LauncherOptions();
openOptions.DisplayApplicationPicker = true;
var openFile = await Windows.System.Launcher.LaunchFileAsync(ManualFile, openOptions);
}
else
{
Debug.WriteLine(response.StatusCode.ToString());
}
}
的事情是,此代码似乎可以在小型PDF或zip文件上正常工作。但是,当涉及到大于10MB的PDF文件时,应用程序只会挂在以下行:
var response = await client.GetAsync(url);
我该怎么做才能做到这一点?提前感谢!
注意:我使用Windows.Web.Http.HttpClient而不是System.Net.Http.HttpClient。
编辑:我试过跳过client.GetAsync(url)
并直接运行var buffer = await client.GetBufferAsync(url);
。这也会导致死机。
您是否更新了config中的maxRequestLength属性? 您是否考虑将GetAsync更改为ReadAsStreamAsync并将Stream写入文件?该文件不会被下载到内存中,而是直接保存到文件中,我想。 –