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);
}
});
}
