本文整理汇总了C#中TaskCompletionSource.Iterate方法的典型用法代码示例。如果您正苦于以下问题：C# TaskCompletionSource.Iterate方法的具体用法？C# TaskCompletionSource.Iterate怎么用？C# TaskCompletionSource.Iterate使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类TaskCompletionSource的用法示例。
在下文中一共展示了TaskCompletionSource.Iterate方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: GetImplHttp
private Task GetImplHttp(bool resumeExistingDownload = true)
{
var webRequest = (HttpWebRequest) WebRequest.Create(RemoteLocation);
webRequest.AllowAutoRedirect = true;
webRequest.Method = WebRequestMethods.Http.Get;
if (IsCancelled) {
return CancelledTask();
}
return CoTask.Factory.FromAsync<WebResponse>(webRequest.BeginGetResponse, webRequest.EndGetResponse, this).ContinueWithParent(
asyncResult => {
try {
var v = webRequest;
if (IsCancelled) {
Cancel();
}
var httpWebResponse = asyncResult.Result as HttpWebResponse;
LastStatus = httpWebResponse.StatusCode;
if (httpWebResponse.StatusCode == HttpStatusCode.OK) {
_lastModified = httpWebResponse.LastModified;
_contentLength = httpWebResponse.ContentLength;
ActualRemoteLocation = httpWebResponse.ResponseUri;
if (IsCancelled) {
Cancel();
}
GenerateLocalFilename();
var filename = httpWebResponse.ContentDispositionFilename();
if (!string.IsNullOrEmpty(filename)) {
GenerateLocalFilename(filename);
}
try {
// we should open the file here, so that it's ready when we start the async read cycle.
if( _filestream != null ) {
throw new Exception("THIS VERY BAD AND UNEXPECTED.");
}
_filestream = File.Open(LocalFullPath, FileMode.Create);
if (IsCancelled) {
Cancel();
}
var tcs = new TaskCompletionSource<HttpWebResponse>(TaskCreationOptions.AttachedToParent);
((Tasklet) tcs.Task).CancellationToken = Tasklet.CurrentCancellationToken;
tcs.Iterate(AsyncReadImpl(tcs, httpWebResponse));
return;
}
catch {
// failed to actually create the file, or some other catastrophic failure.
Complete();
return;
}
}
// this is not good.
throw new Exception("Status Code other than OK");
}
catch (WebException e) {
try {
LastStatus = ((HttpWebResponse) e.Response).StatusCode;
}
catch (Exception) {
// if the fit hits the shan, just call it not found.
LastStatus = HttpStatusCode.NotFound;
}
Complete();
}
catch (AggregateException ae) {
ae = ae.Flatten();
var e = ae.InnerExceptions[0] as WebException;
if (e != null) {
try {
LastStatus = ((HttpWebResponse)e.Response).StatusCode;
}
catch (Exception) {
// if the fit hits the shan, just call it not found.
LastStatus = HttpStatusCode.NotFound;
}
}
Complete();
return;
}
catch (Exception e) {
Console.WriteLine("BAD ERROR: {0}\r\n{1}", e.Message, e.StackTrace);
LastStatus = HttpStatusCode.NotFound;
Complete();
return;
}
Console.WriteLine("Really? It gets here?");
Complete();
//.........这里部分代码省略.........
示例2: GetAsync
public Task GetAsync()
{
var webRequest = (HttpWebRequest)WebRequest.Create(RemoteLocation);
webRequest.AllowAutoRedirect = true;
webRequest.Method = WebRequestMethods.Http.Get;
webRequest.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
return Task.Factory.FromAsync(webRequest.BeginGetResponse, (Func<IAsyncResult, WebResponse>)webRequest.BetterEndGetResponse, this).ContinueWith(asyncResult => {
// Logging.Logger.Message("In FromAsync Task::::::{0}", RemoteLocation);
try {
if (_isCanceled) {
_failed(RemoteLocation);
return;
}
var httpWebResponse = asyncResult.Result as HttpWebResponse;
_lastStatus = httpWebResponse.StatusCode;
if (httpWebResponse.StatusCode == HttpStatusCode.OK) {
_lastModified = httpWebResponse.LastModified;
_contentLength = httpWebResponse.ContentLength;
ActualRemoteLocation = httpWebResponse.ResponseUri;
if (_isCanceled) {
_failed(RemoteLocation);
return;
}
if (string.IsNullOrEmpty(_filename)) {
_filename = httpWebResponse.ContentDispositionFilename();
if (string.IsNullOrEmpty(_filename)) {
_filename = ActualRemoteLocation.LocalPath.Substring(ActualRemoteLocation.LocalPath.LastIndexOf('/') + 1);
if (string.IsNullOrEmpty(_filename) || ServerSideExtensions.Contains(Path.GetExtension(_filename))) {
ActualRemoteLocation.GetLeftPart(UriPartial.Path).MakeSafeFileName();
}
}
}
try {
if (Filename.FileIsLocalAndExists()) {
var md5 = string.Empty;
try {
if (httpWebResponse.Headers.AllKeys.ContainsIgnoreCase("x-ms-meta-MD5")) {
// it's coming from azure, check the value of the md5 and compare against the file on disk ... better than date/size matching.
md5 = httpWebResponse.Headers["x-ms-meta-MD5"].Trim();
} else if (httpWebResponse.Headers.AllKeys.ContainsIgnoreCase("Content-MD5")) {
md5 = httpWebResponse.Headers["Content-MD5"].Trim();
if (md5.EndsWith("=")) {
md5 = Convert.FromBase64CharArray(md5.ToCharArray(), 0, md5.Length).ToUtf8String();
}
}
} catch {
// something gone screwy?
}
if (!string.IsNullOrEmpty(md5)) {
var localMD5 = string.Empty;
using (var stream = new FileStream(Filename, FileMode.Open, FileAccess.Read, FileShare.Read)) {
localMD5 = MD5.Create().ComputeHash(stream).ToHexString();
}
if (string.Equals(md5, localMD5, StringComparison.CurrentCultureIgnoreCase)) {
// it's the same file. We're not doin nothing.
_completed(RemoteLocation);
return;
}
// only do the size/date comparison if the server doesn't provide an MD5
} else if (_contentLength > 0 && _lastModified.CompareTo(File.GetCreationTime(Filename)) <= 0 && _contentLength == new FileInfo(Filename).Length) {
// file is identical to the one on disk.
// we're not going to reget it. :p
_completed(RemoteLocation);
return;
}
}
// we should open the file here, so that it's ready when we start the async read cycle.
if (_filestream != null) {
_failed(RemoteLocation);
throw new CoAppException("THIS VERY BAD AND UNEXPECTED. (Failed to close?)");
}
_filestream = File.Open(Filename, FileMode.Create);
if (_isCanceled) {
_failed(RemoteLocation);
return;
}
var tcs = new TaskCompletionSource<HttpWebResponse>(TaskCreationOptions.AttachedToParent);
tcs.Iterate(AsyncReadImpl(tcs, httpWebResponse));
return;
} catch {
// failed to actually create the file, or some other catastrophic failure.
_failed(RemoteLocation);
return;
}
}
// this is not good.
//.........这里部分代码省略.........