public async Task <string> GetData()
{
var cts = new CancellationTokenSource();
cts.CancelAfter(TimeSpan.FromSeconds(30));
var webService = PeripheralInfo.IP + WebServiceGetBuffer;
var resourceUri = new Uri(webService);
try
{
Windows.Web.Http.HttpResponseMessage response = await httpClient.PostAsync(resourceUri, null);
var message = await response.Content.ReadAsStringAsync();
if (message != "")
{
OnReceivedData(DataHandling.DataConversion.StringToListByteArray(message).ToArray());
}
response.Dispose();
cts.Dispose();
return(message);
}
catch (TaskCanceledException ex)
{
// Handle request being canceled due to timeout.
Debug.WriteLine(ex.Message);
return("");
}
return("");
}
private static async Task <BitmapImage> GetMainSubStep_CookielessGetPic(string picUrl)
{
Uri myUri = new Uri(picUrl);
HttpRequestMessage req = new HttpRequestMessage(HttpMethod.Get, myUri);
req.Headers.Host = new HostName(myUri.Host);
req.Headers.Cookie.Clear();
HttpResponseMessage response = await client.SendRequestAsync(req);
if (response == null)
{
return(null);
}
//HttpResponseMessage response
if (response.StatusCode != HttpStatusCode.Ok)
{
return(null);
}
IHttpContent icont = response.Content;
IBuffer buffer = await icont.ReadAsBufferAsync();
IRandomAccessStream irStream = new InMemoryRandomAccessStream();
BitmapImage img = new BitmapImage();
await irStream.WriteAsync(buffer);
irStream.Seek(0);
await img.SetSourceAsync(irStream);
irStream.Dispose();
icont.Dispose();
response.Dispose();
req.Dispose();
return(img);
}
//prepared private
public static async Task <string> CookiedGetUrl(string url, string referrer)
{
HttpResponseMessage response = null;
try
{
HttpRequestMessage req = new HttpRequestMessage(HttpMethod.Get, new Uri(url));
req.Headers.Referer = new Uri(referrer);
response = await client.SendRequestAsync(req);
req.Dispose();
}
catch (COMException e)
{
if ((uint)e.HResult == 0x80072f76)
{
await ShowMessageDialog("可能是被验证码阻挡。",
"错误代码：" + String.Format("{0:x8}", e.HResult) + "\n错误类型：" + e.GetType() + "\n错误信息：" +
e.Message + "\n"
+ "如果是验证码问题，请不要立即点确定。请先打开浏览器，输入验证码。");
await ShowMessageDialog("提示", "如果已经输入验证码，可以确认继续；\n如果发现Cookie已失效，继续并稍后以重新设置Cookie");
}
try
{
HttpRequestMessage req = new HttpRequestMessage(HttpMethod.Get, new Uri(url));
req.Headers.Referer = new Uri(referrer);
response = await client.SendRequestAsync(req);
req.Dispose();
}
catch (COMException e2)
{
if ((uint)e2.HResult == 0x80072f76)
{
await ShowMessageDialog("错误未解决。",
"错误类型：" + e2.GetType() + "\n错误信息：" + e2.Message + "\n持续网络故障。为避免故障扩大，程序将结束。可检查网络/jingyan.baidu.com，稍后再启动。");
Application.Current.Exit();
}
if ((uint)e2.HResult == 0x80072efd)
{
await ShowMessageDialog("错误未解决。80072efd，系统网络故障",
"错误类型：" + e2.GetType() + "\n错误信息：" + e2.Message + "\n请百度80072efd寻找解决办法。该故障和系统网络设置有关。可能是被国产安全软件乱优化造成。\n持续网络故障。为避免故障扩大，程序将结束。可检查网络，稍后再启动。");
Application.Current.Exit();
}
client.Dispose();
await ShowMessageDialog("未知故障。可能是网络问题", "错误类型：" + e2.GetType() + "\n错误信息：" + e2.Message);
throw new COMException(e2.Message);
}
}
if (response == null)
{
return("RESPONSE NULL");
}
if (response.StatusCode != HttpStatusCode.Ok)
{
return(response.StatusCode.ToString());
}
IHttpContent icont = response.Content;
IInputStream istream = await icont.ReadAsInputStreamAsync();
StreamReader reader = new StreamReader(istream.AsStreamForRead(), Encoding.UTF8);
string content = reader.ReadToEnd();
reader.Dispose();
istream.Dispose();
icont.Dispose();
response.Dispose();
return(content);
}
