Re: [Cppcms-users] comet question

[Artyom <art...@ya...>]

Hello,

Ok, there was a bug, fixed in changeset 1315, take update from svn.
Now should work. It happened after some code re-factoring that was done 
recently.

Artyom




> From: Frank Enderle <fra...@an...>
> 
> hi,
> 
> i added the finalize calls.
> 
> - i use cppcms from svn (revision  1314)
> - it happens when i try to access the url for postMessage  or
> consumeMessage using chrome (or i guess any other browser)
> 
> the  application runs in scgi mode behind nginx. could this be the  problem?
> 
> frank.
> 
> Am 13.07.2010 15:59, schrieb Artyom:
> >  Hi,
> > 
> > I've tested your code and it mostly works.
> > 
> >  Also I don't see any "Access to unassigned context" errors
> > 
> > The  only problem is that you need to add "response().finalize();" before  
>calling
> > async_complete_response() in case you do not write anything to  output (i.e. 
>not 
>
> > accessed to out())
> > 
> > I've updated the  blog post. 
> > 
> > About unassigned context 
> > 
> > - what  version of CppCMS are you using.
> > - In what case it happens (which URL is  accessed and in what method)?
> > 
> > This exception is thrown in case  you try to use any request/response related 
>
> > information
> > after  calling release_context(), do you call any functions after 
> >  release_context()
> > In what location the exception is thrown?
> > 
> > Artyom
> > 
> > See where to add finalize() in the code  below.
> > 
> > 
> >>
> >> i try to build the example from  the  blogpost
> >>
> >>  http://art-blog.no-ip.info/cppcms/blog/post/47
> >>
> >> and  i'm  kind of stuck. the example seems not to be really  compatible
> >> with the current  cppcms version. i adapted the  source as follows:
> >>
> >> class lpTest : public   cppcms::application {
> >> public:
> >>    lpTest(cppcms::service &srv)  :
> >>      cppcms::application(srv) {
> >>
> >>       dispatcher().assign("^/postMessage$",
> >>                            &lpTest::postMessage,  this);
> >>       dispatcher().assign("^/consumeMessage/(\\d+)$",
> >>                             &lpTest::consumeMessage, this, 1);
> >>    }
> >>
> >>   void  postMessage() {
> >>      if(request().request_method() == "POST")  {
> >>        if(request().post().find("message") !=   request().post().end()) {
> >>           messages.push_back(request().post().find("message")->second);
> >>           broadcast();
> >>        }
> >>      }
> >>
> > 
> > NEED  response().finalize() THERE
> > 
> >>       release_context()->async_complete_response();
> >>    }
> >>
> >>   void  consumeMessage(std::string id)  {
> >>     unsigned pos =   atoi(id.c_str());
> >>
> >>     if(pos <  messages.size()) {
> >>         response().set_plain_text_header();
> >>         response().out() << messages[pos];
> >>         release_context()->async_complete_response();
> >>     }  else if(pos  == messages.size()) {
> >>         waiters.push_back(release_context());
> >>     } else  {
> >>        response().status(404);
> > 
> > NEED response().finalize() THERE
> > 
> >>         release_context()->async_complete_response();
> >>      }
> >>    }
> >>
> >>   void  broadcast() {
> >>     // send the message to all   waiters
> >>     for(unsigned i=0; i<waiters.size(); i++)  {
> >>         waiters[i]->response().set_plain_text_header();
> >>         waiters[i]->response().out() <<   messages.back();
> >>         waiters[i]->async_complete_response();
> >>      }
> >>
> >>      waiters.clear();
> >>    }
> >>
> >> private:
> >>     std::vector<std::string> messages;
> >>     std::vector<booster::shared_ptr<cppcms::http::context> >   waiters;
> >> };
> >>
> >> and for  main:
> >>
> >>   cppcms::service srv(argc,   argv);
> >>   booster::intrusive_ptr<lpTest> app = new   lpTest(srv);
> >>    srv.applications_pool().mount(app);
> >>     srv.run();
> >>
> >> as far as i understand this should work. my  problem is that if  i start
> >> the application and do a request it  gives me the following  exception:
> >>
> >> Catched excepion  [Access to unassigned context]   
>(.../http_context.cpp:144)
> >>
> >> it seems like the framework  tries to do  something with the context
> >> though it has been  released by release_context() -  what am i   missing?
> >>
> >> frank
> >>
> >>
> >>  
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> > 
> > 
> >      
> > 
> >  
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> 
> -- 
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> 
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