Re: [Cppcms-users] comet question

[Frank E. <fra...@an...>]

hi,

the exception is now gone. thanks.

frank.

Am 13.07.2010 17:00, schrieb Artyom:
> 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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>>
>> -- 
>> Dipl.-Ing. (FH) Frank Enderle
>>
>> anamica UG  (haftungsbeschränkt)
>> Beinsteinerstr. 6
>> 71334  Waiblingen
>>
>> Telefon:  +49 151 14981091
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> 
> 
>       
> 
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-- 
Dipl.-Ing. (FH) Frank Enderle

anamica UG (haftungsbeschränkt)
Beinsteinerstr. 6
71334 Waiblingen

Telefon:  +49 151 14981091
Telefax:  +49 7151 1335770
E-Mail:   fra...@an...
Internet: www.anamica.de

Handelsregister: AG Stuttgart HRB 732357
Geschäftsführer: Yvonne Holzwarth, Frank Enderle