public static ICouchbaseResponseState GetChangesPost(ICouchbaseListenerContext context)
{
DBMonitorCouchbaseResponseState responseState = new DBMonitorCouchbaseResponseState();
var responseObject = PerformLogicWithDatabase(context, true, db =>
{
var response = context.CreateResponse();
responseState.Response = response;
var body = context.BodyAs<Dictionary<string, object>>();
ProcessBody(body);
if (body.GetCast<ChangesFeedMode>("feed") < ChangesFeedMode.Continuous) {
if(context.CacheWithEtag(db.GetLastSequenceNumber().ToString())) {
response.InternalStatus = StatusCode.NotModified;
return response;
}
}
var options = ChangesOptions.Default;
responseState.Db = db;
responseState.ContentOptions = body.GetCast<DocumentContentOptions>("content_options");
responseState.ChangesFeedMode = body.GetCast<ChangesFeedMode>("feed");
responseState.ChangesIncludeDocs = body.GetCast<bool>("include_docs");
options.IncludeDocs = responseState.ChangesIncludeDocs;
responseState.ChangesIncludeConflicts = body.GetCast<string>("style") == "all_docs";
options.IncludeConflicts = responseState.ChangesIncludeConflicts;
options.ContentOptions = responseState.ContentOptions;
options.SortBySequence = !options.IncludeConflicts;
options.Limit = body.GetCast<int>("limit", options.Limit);
int since = body.GetCast<int>("since");
string filterName = body.GetCast<string>("filter");
if(filterName != null) {
Status status = new Status();
responseState.ChangesFilter = db.GetFilter(filterName, status);
if(responseState.ChangesFilter == null) {
return context.CreateResponse(status.Code);
}
responseState.FilterParams = context.GetQueryParams();
}
RevisionList changes = db.ChangesSince(since, options, responseState.ChangesFilter, responseState.FilterParams);
if((responseState.ChangesFeedMode >= ChangesFeedMode.Continuous) ||
(responseState.ChangesFeedMode == ChangesFeedMode.LongPoll && changes.Count == 0)) {
// Response is going to stay open (continuous, or hanging GET):
response.Chunked = true;
if(responseState.ChangesFeedMode == ChangesFeedMode.EventSource) {
response["Content-Type"] = "text/event-stream; charset=utf-8";
}
if(responseState.ChangesFeedMode >= ChangesFeedMode.Continuous) {
response.WriteHeaders();
foreach(var rev in changes) {
response.SendContinuousLine(ChangesDictForRev(rev, responseState), context.ChangesFeedMode);
}
}
responseState.SubscribeToDatabase(db);
int heartbeat = body.GetCast<int>("heartbeat", Int32.MinValue);
if(heartbeat != Int32.MinValue) {
if(heartbeat <= 0) {
responseState.IsAsync = false;
return context.CreateResponse(StatusCode.BadParam);
}
heartbeat = Math.Max(heartbeat, (int)MinHeartbeat.TotalMilliseconds);
string heartbeatResponse = context.ChangesFeedMode == ChangesFeedMode.EventSource ? "\n\n" : "\r\n";
responseState.StartHeartbeat(heartbeatResponse, TimeSpan.FromMilliseconds(heartbeat));
}
return context.CreateResponse();
} else {
if(responseState.ChangesIncludeConflicts) {
response.JsonBody = new Body(ResponseBodyForChanges(changes, since, options.Limit, responseState));
} else {
response.JsonBody = new Body(ResponseBodyForChanges(changes, since, responseState));
}
return response;
}
});
responseState.Response = responseObject;
return responseState;
}
/// <summary>
/// Returns a sorted list of changes made to documents in the database, in time order of application.
/// </summary>
/// <returns>The response state for further HTTP processing</returns>
/// <param name="context">The context of the Couchbase Lite HTTP request</param>
/// <remarks>
/// http://docs.couchdb.org/en/latest/api/database/changes.html#get--db-_changes
/// </remarks>
public static ICouchbaseResponseState GetChanges(ICouchbaseListenerContext context)
{
DBMonitorCouchbaseResponseState responseState = new DBMonitorCouchbaseResponseState();
var responseObject = PerformLogicWithDatabase(context, true, db =>
{
var response = context.CreateResponse();
responseState.Response = response;
if (context.ChangesFeedMode < ChangesFeedMode.Continuous) {
if(context.CacheWithEtag(db.GetLastSequenceNumber().ToString())) {
response.InternalStatus = StatusCode.NotModified;
return response;
}
}
var options = ChangesOptions.Default;
responseState.Db = db;
responseState.ContentOptions = context.ContentOptions;
responseState.ChangesFeedMode = context.ChangesFeedMode;
responseState.ChangesIncludeDocs = context.GetQueryParam<bool>("include_docs", bool.TryParse, false);
options.IncludeDocs = responseState.ChangesIncludeDocs;
responseState.ChangesIncludeConflicts = context.GetQueryParam("style") == "all_docs";
options.IncludeConflicts = responseState.ChangesIncludeConflicts;
options.ContentOptions = context.ContentOptions;
options.SortBySequence = !options.IncludeConflicts;
options.Limit = context.GetQueryParam<int>("limit", int.TryParse, options.Limit);
int since = context.GetQueryParam<int>("since", int.TryParse, 0);
string filterName = context.GetQueryParam("filter");
if(filterName != null) {
Status status = new Status();
responseState.ChangesFilter = db.GetFilter(filterName, status);
if(responseState.ChangesFilter == null) {
return context.CreateResponse(status.Code);
}
responseState.FilterParams = context.GetQueryParams();
}
RevisionList changes = db.ChangesSince(since, options, responseState.ChangesFilter, responseState.FilterParams);
if((context.ChangesFeedMode >= ChangesFeedMode.Continuous) ||
(context.ChangesFeedMode == ChangesFeedMode.LongPoll && changes.Count == 0)) {
// Response is going to stay open (continuous, or hanging GET):
response.Chunked = true;
if(context.ChangesFeedMode == ChangesFeedMode.EventSource) {
response["Content-Type"] = "text/event-stream; charset=utf-8";
}
if(context.ChangesFeedMode >= ChangesFeedMode.Continuous) {
response.WriteHeaders();
foreach(var rev in changes) {
var success = response.SendContinuousLine(ChangesDictForRev(rev, responseState), context.ChangesFeedMode);
if(!success) {
return context.CreateResponse(StatusCode.BadRequest);
}
}
}
responseState.SubscribeToDatabase(db);
string heartbeatParam = context.GetQueryParam("heartbeat");
if(heartbeatParam != null) {
int heartbeat;
if(!int.TryParse(heartbeatParam, out heartbeat) || heartbeat <= 0) {
responseState.IsAsync = false;
return context.CreateResponse(StatusCode.BadParam);
}
var heartbeatSpan = TimeSpan.FromMilliseconds(heartbeat);
if(heartbeatSpan < MinHeartbeat) {
heartbeatSpan = MinHeartbeat;
}
string heartbeatResponse = context.ChangesFeedMode == ChangesFeedMode.EventSource ? "\n\n" : "\r\n";
responseState.StartHeartbeat(heartbeatResponse, heartbeatSpan);
}
return response;
} else {
if(responseState.ChangesIncludeConflicts) {
response.JsonBody = new Body(ResponseBodyForChanges(changes, since, options.Limit, responseState));
} else {
response.JsonBody = new Body(ResponseBodyForChanges(changes, since, responseState));
}
return response;
}
});
responseState.Response = responseObject;
return responseState;
}
