private void Run() { IsRunning = true; var clientCopy = Client; if (clientCopy == null) { // This is a race condition that can be reproduced by calling cbpuller.start() and cbpuller.stop() // directly afterwards. What happens is that by the time the Changetracker thread fires up, // the cbpuller has already set this.client to null. See issue #109 Log.To.ChangeTracker.W(Tag, "ChangeTracker run() loop aborting because client == null"); return; } if (tokenSource.IsCancellationRequested) { tokenSource.Dispose(); tokenSource = new CancellationTokenSource(); } if (Request != null) { Request.Dispose(); Request = null; } var url = ChangesFeedUrl; if (_usePost) { Request = new HttpRequestMessage(HttpMethod.Post, url); var body = GetChangesFeedPostBody().ToArray(); Request.Content = new ByteArrayContent(body); Request.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json"); } else { Request = new HttpRequestMessage(HttpMethod.Get, url); } AddRequestHeaders(Request); Log.To.ChangeTracker.V(Tag, "Making request to {0}", new SecureLogUri(url)); if (tokenSource.Token.IsCancellationRequested) { return; } try { changesFeedRequestTokenSource = CancellationTokenSource.CreateLinkedTokenSource(tokenSource.Token); _httpClient.Authenticator = Authenticator; var info = _httpClient.SendAsync( Request, HttpCompletionOption.ResponseHeadersRead, changesFeedRequestTokenSource.Token ); info.ContinueWith(ChangeFeedResponseHandler, changesFeedRequestTokenSource.Token, TaskContinuationOptions.LongRunning, TaskScheduler.Default); } catch (Exception e) { RetryOrStopIfNecessary(e); } }
private Task ExecuteRequest(CouchbaseLiteHttpClient httpClient, HttpRequestMessage request) { object fullBody = null; Exception error = null; HttpResponseMessage response = null; if (_tokenSource.IsCancellationRequested) { RespondWithResult(fullBody, new Exception(string.Format("{0}: Request {1} has been aborted", this, request)), response); var tcs = new TaskCompletionSource <bool>(); tcs.SetCanceled(); return(tcs.Task); } request.Headers.AcceptEncoding.Add(new StringWithQualityHeaderValue("gzip")); request.Headers.Add("X-Accept-Part-Encoding", "gzip"); Log.To.Sync.V(Tag, "Sending request: {0}", request); var requestTokenSource = CancellationTokenSource.CreateLinkedTokenSource(_tokenSource.Token); httpClient.Authenticator = Authenticator; return(httpClient.SendAsync(request, requestTokenSource.Token).ContinueWith(t => { requestTokenSource.Dispose(); try { response = t.Result; } catch (Exception e) { var err = Misc.Flatten(e).First(); Log.To.Sync.E(Tag, "Unhandled exception while getting bulk documents", err); error = err; RespondWithResult(fullBody, err, response); return; } try { if (response == null) { Log.To.Sync.I(Tag, "Didn't get response for {0}", request); error = new HttpRequestException(); RespondWithResult(fullBody, error, response); } else if (!response.IsSuccessStatusCode) { HttpStatusCode status = response.StatusCode; Log.To.Sync.I(Tag, "Got error status: {0} for {1}. Reason: {2}", status.GetStatusCode(), request, response.ReasonPhrase); error = new HttpResponseException(status); RespondWithResult(fullBody, error, response); } else { Log.To.Sync.D(Tag, "Processing response: {0}", response); var entity = response.Content; var contentTypeHeader = entity.Headers.ContentType; Stream inputStream = null; if (contentTypeHeader != null && contentTypeHeader.ToString().Contains("multipart/")) { Log.To.Sync.D(Tag, "contentTypeHeader = {0}", contentTypeHeader.ToString()); try { _topReader = new MultipartReader(contentTypeHeader.ToString(), this); inputStream = entity.ReadAsStreamAsync().Result; const int bufLen = 1024; var buffer = new byte[bufLen]; var numBytesRead = 0; while ((numBytesRead = inputStream.Read(buffer, 0, bufLen)) > 0) { if (numBytesRead != bufLen) { var bufferToAppend = new Couchbase.Lite.Util.ArraySegment <byte>(buffer, 0, numBytesRead).ToArray(); _topReader.AppendData(bufferToAppend); } else { _topReader.AppendData(buffer); } } RespondWithResult(fullBody, error, response); } finally { try { inputStream.Close(); } catch (IOException) { } } } else { Log.To.Sync.D(Tag, "contentTypeHeader is not multipart = {0}", contentTypeHeader.ToString()); if (entity != null) { try { inputStream = entity.ReadAsStreamAsync().Result; fullBody = Manager.GetObjectMapper().ReadValue <object>(inputStream); RespondWithResult(fullBody, error, response); } finally { try { inputStream.Close(); } catch (IOException) { } } } } } } catch (Exception e) { var err = (e is AggregateException) ? e.InnerException : e; Log.To.Sync.E(Tag, "Exception while processing bulk download response", err); error = err; RespondWithResult(fullBody, err, response); } })); }
private Task ExecuteRequest(CouchbaseLiteHttpClient httpClient, HttpRequestMessage request) { object fullBody = null; Exception error = null; HttpResponseMessage response = null; if (_tokenSource.IsCancellationRequested) { RespondWithResult(fullBody, new Exception(string.Format("{0}: Request {1} has been aborted", this, request)), response); var tcs = new TaskCompletionSource<bool>(); tcs.SetCanceled(); return tcs.Task; } request.Headers.AcceptEncoding.Add(new StringWithQualityHeaderValue("gzip")); request.Headers.Add("X-Accept-Part-Encoding", "gzip"); Log.To.Sync.V(Tag, "Sending request: {0}", request); var requestTokenSource = CancellationTokenSource.CreateLinkedTokenSource(_tokenSource.Token); httpClient.Authenticator = Authenticator; return httpClient.SendAsync(request, requestTokenSource.Token).ContinueWith(t => { requestTokenSource.Dispose(); try { response = t.Result; } catch(Exception e) { var err = Misc.Flatten(e).First(); Log.To.Sync.E(Tag, "Unhandled exception while getting bulk documents", err); error = err; RespondWithResult(fullBody, err, response); return; } try { if (response == null) { Log.To.Sync.I(Tag, "Didn't get response for {0}", request); error = new HttpRequestException(); RespondWithResult(fullBody, error, response); } else if (!response.IsSuccessStatusCode) { HttpStatusCode status = response.StatusCode; Log.To.Sync.I(Tag, "Got error status: {0} for {1}. Reason: {2}", status.GetStatusCode(), request, response.ReasonPhrase); error = new HttpResponseException(status); RespondWithResult(fullBody, error, response); } else { Log.To.Sync.D(Tag, "Processing response: {0}", response); var entity = response.Content; var contentTypeHeader = entity.Headers.ContentType; Stream inputStream = null; if (contentTypeHeader != null && contentTypeHeader.ToString().Contains("multipart/")) { Log.To.Sync.D(Tag, "contentTypeHeader = {0}", contentTypeHeader.ToString()); try { _topReader = new MultipartReader(contentTypeHeader.ToString(), this); inputStream = entity.ReadAsStreamAsync().Result; const int bufLen = 1024; var buffer = new byte[bufLen]; var numBytesRead = 0; while ((numBytesRead = inputStream.Read(buffer, 0, bufLen)) > 0) { if (numBytesRead != bufLen) { var bufferToAppend = new Couchbase.Lite.Util.ArraySegment<byte>(buffer, 0, numBytesRead).ToArray(); _topReader.AppendData(bufferToAppend); } else { _topReader.AppendData(buffer); } } RespondWithResult(fullBody, error, response); } finally { try { inputStream.Close(); } catch (IOException) { } } } else { Log.To.Sync.D(Tag, "contentTypeHeader is not multipart = {0}", contentTypeHeader.ToString()); if (entity != null) { try { inputStream = entity.ReadAsStreamAsync().Result; fullBody = Manager.GetObjectMapper().ReadValue<object>(inputStream); RespondWithResult(fullBody, error, response); } finally { try { inputStream.Close(); } catch (IOException) { } } } } } } catch (Exception e) { var err = (e is AggregateException) ? e.InnerException : e; Log.To.Sync.E(Tag, "Exception while processing bulk download response", err); error = err; RespondWithResult(fullBody, err, response); } }); }