/// <summary>
/// Create an observable object.
/// </summary>
static IObservable <StreamingMessage> ReactiveBase(this StreamingApi e, StreamingType type, StreamingParameters parameters = null)
{
return(Observable.Create <StreamingMessage>((observer, cancel) => Task.Factory.StartNew(() =>
{
var url = type == StreamingType.User ? "https://userstream.twitter.com/1.1/user.json" :
type == StreamingType.Site ? " https://sitestream.twitter.com/1.1/site.json " :
type == StreamingType.Filter ? "https://stream.twitter.com/1.1/statuses/filter.json" :
type == StreamingType.Sample ? "https://stream.twitter.com/1.1/statuses/sample.json" :
type == StreamingType.Firehose ? "https://stream.twitter.com/1.1/statuses/firehose.json" : "";
cancel.ThrowIfCancellationRequested();
using (var reader = Connect(e.IncludedTokens, parameters, type == StreamingType.Filter ? MethodType.Post : MethodType.Get, url))
{
cancel.ThrowIfCancellationRequested();
cancel.Register(() => reader.Close());
foreach (var s in reader.EnumerateLines().Where(x => !string.IsNullOrEmpty(x)))
{
observer.OnNext(RawJsonMessage.Create(e.IncludedTokens, s));
observer.OnNext(StreamingMessage.Parse(e.IncludedTokens, s));
}
}
}, cancel, TaskCreationOptions.LongRunning, TaskScheduler.Default)));
}
private static IObservable <StreamingMessage> AccessStreamingApiAsObservableImpl(StreamingApi e, StreamingType type, IEnumerable <KeyValuePair <string, object> > parameters)
{
return(Observable.Create <StreamingMessage>((observer, cancel) =>
{
return e.IncludedTokens.SendStreamingRequestAsync(e.GetMethodType(type), e.GetUrl(type), parameters, cancel)
.ContinueWith(task =>
{
if (task.IsFaulted)
{
task.Exception.InnerException.Rethrow();
}
return task.Result.GetResponseStreamAsync();
}, cancel)
.Unwrap()
.ContinueWith(task =>
{
if (task.IsFaulted)
{
task.Exception.InnerException.Rethrow();
}
try
{
using (var reader = new StreamReader(task.Result))
using (var reg = cancel.Register(() => reader.Dispose()))
{
foreach (var s in reader.EnumerateLines().Where(x => !string.IsNullOrEmpty(x)))
{
try
{
observer.OnNext(StreamingMessage.Parse(s));
}
catch (ParsingException ex)
{
observer.OnNext(RawJsonMessage.Create(s, ex));
}
}
}
}
finally
{
cancel.ThrowIfCancellationRequested();
}
}, cancel, TaskContinuationOptions.LongRunning, TaskScheduler.Default);
}));
}
/// <summary>
/// Starts the stream.
/// </summary>
/// <returns>The observable object.</returns>
/// <param name="e">Tokens.</param>
/// <param name="type">Type of streaming API.</param>
/// <param name="parameters">Parameters.</param>
public static IObservable <StreamingMessage> StartObservableStream(this StreamingApi e, StreamingType type, StreamingParameters parameters = null)
{
if (parameters == null)
{
parameters = new StreamingParameters();
}
return(Observable.Create <StreamingMessage>((observer, cancel) =>
{
var url = type == StreamingType.User ? "https://userstream.twitter.com/1.1/user.json" :
type == StreamingType.Site ? " https://sitestream.twitter.com/1.1/site.json " :
type == StreamingType.Filter ? "https://stream.twitter.com/1.1/statuses/filter.json" :
type == StreamingType.Sample ? "https://stream.twitter.com/1.1/statuses/sample.json" :
type == StreamingType.Firehose ? "https://stream.twitter.com/1.1/statuses/firehose.json" : "";
return e.IncludedTokens.SendStreamingRequestAsync(type == StreamingType.Filter ? MethodType.Post : MethodType.Get, url, parameters.Parameters, cancel)
.ContinueWith(task =>
{
if (task.IsFaulted)
{
task.Exception.InnerException.Rethrow();
}
return task.Result.GetResponseStreamAsync();
}, cancel)
.Unwrap()
.ContinueWith(task =>
{
if (task.IsFaulted)
{
task.Exception.InnerException.Rethrow();
}
try
{
using (var reader = new StreamReader(task.Result))
using (var reg = cancel.Register(() => reader.Dispose()))
{
foreach (var s in reader.EnumerateLines().Where(x => !string.IsNullOrEmpty(x)))
{
#if !DEBUG
try
{
#endif
observer.OnNext(StreamingMessage.Parse(s));
#if !DEBUG
}
catch
{
observer.OnNext(RawJsonMessage.Create(s));
}
#endif
}
}
}
finally
{
cancel.ThrowIfCancellationRequested();
}
}, cancel, TaskContinuationOptions.LongRunning, TaskScheduler.Default);
}));
}
