Tried but failed Nitrogen Elements demo

[Wes James]

I tried the demo from:

https://github.com/RomanShestakov/nitrogen_elements

but it fails.  Is that because it is to old for the current nitrogen?  It has a link on the nitrogen downloads page.

Thanks,

-wes

[Jesse Gumm]

Hi Wes,

It may indeed be a bit old. I haven't played with it for a while.

What is the error message you're receiving?

-Jesse

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[Wes James]

I forgot to mention, I began with downloading erlang 18.1, but rebar didn't work with that so I went back to 17.x and it worked there. So I'm on a mac and erlang is working, but the elements  demo errors out with nitrogen/cowboy git cloned 

[Wes James]

Starting Sync (Automatic Code Compiler / Reloader)

Scanning source files...

sync

crypto

ranch

cowboy

Starting Cowboy Server 8000 

nitrogen_elements_examples

It stops here then when I go to localhost:8000 the errors below show up:

=INFO REPORT==== 31-Oct-2015::21:55:12 ===

{error,error,undef,

    [{sbw,post_param,

         [<<"pageContext">>,

          {simple_bridge_request_wrapper,cowboy_request_bridge,

              {cowboy_bridge,#Ref<0.0.0.1890>},

              false,[],[],none}],

         []},

     {wf_core,deserialize_request_context,0,

         [{file,"src/wf_core.erl"},{line,146}]},

     {wf_core,run_catched,0,[{file,"src/wf_core.erl"},{line,82}]},

     {wf_core,run,0,[{file,"src/wf_core.erl"},{line,23}]},

     {nitrogen_cowboy,handle,2,[{file,"src/nitrogen_cowboy.erl"},{line,22}]},

     {cowboy_handler,handler_handle,4,

         [{file,"src/cowboy_handler.erl"},{line,119}]},

     {cowboy_protocol,execute,4,

         [{file,"src/cowboy_protocol.erl"},{line,523}]}]}

=INFO REPORT==== 31-Oct-2015::21:55:12 ===

{error,error,undef,

    [{simple_bridge_request_wrapper,set_status_code,

         [500,

          {simple_bridge_request_wrapper,cowboy_request_bridge,

              {cowboy_bridge,#Ref<0.0.0.1890>},

              false,[],[],none}],

         []},

     {wf_context,status_code,1,[{file,"src/lib/wf_context.erl"},{line,190}]},

     {wf,status_code,1,[{file,"src/wf.erl"},{line,272}]},

     {default_crash_handler,first_request,5,

         [{file,"src/handlers/crash/default_crash_handler.erl"},{line,19}]},

     {wf_core,run_crashed_first_request,3,

         [{file,"src/wf_core.erl"},{line,206}]},

     {wf_core,run_crash,4,[{file,"src/wf_core.erl"},{line,44}]},

     {nitrogen_cowboy,handle,2,[{file,"src/nitrogen_cowboy.erl"},{line,22}]},

     {cowboy_handler,handler_handle,4,

         [{file,"src/cowboy_handler.erl"},{line,119}]}]}

=ERROR REPORT==== 31-Oct-2015::21:55:12 ===

** Cowboy handler nitrogen_cowboy terminating in handle/2

   for the reason error:undef

** Handler state was {state,undefined,undefined}

** Request was [{socket,#Port<0.1857>},

                {transport,ranch_tcp},

                {connection,keepalive},

                {pid,<0.231.0>},

                {method,<<"GET">>},

                {version,'HTTP/1.1'},

                {peer,{{127,0,0,1},58165}},

                {host,<<"localhost">>},

                {host_info,undefined},

                {port,8000},

                {path,<<"/">>},

                {path_info,undefined},

                {qs,<<>>},

                {qs_vals,undefined},

                {bindings,[]},

                {headers,[{<<"host">>,<<"localhost:8000">>},

                          {<<"accept">>,

                           <<"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8">>},

                          {<<"accept-language">>,<<"en-us">>},

                          {<<"connection">>,<<"keep-alive">>},

                          {<<"accept-encoding">>,<<"gzip, deflate">>},

                          {<<"user-agent">>,

                           <<"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.7 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.7">>}]},

                {p_headers,[{<<"connection">>,[<<"keep-alive">>]}]},

                {cookies,undefined},

                {meta,[]},

                {body_state,waiting},

                {multipart,undefined},

                {buffer,<<>>},

                {resp_compress,false},

                {resp_state,waiting},

                {resp_headers,[]},

                {resp_body,<<>>},

                {onresponse,undefined}]

** Stacktrace: [{sbw,set_status_code,

                    [500,

                     {simple_bridge_request_wrapper,cowboy_request_bridge,

                         {cowboy_bridge,#Ref<0.0.0.1890>},

                         false,[],[],none}],

                    []},

                {wf_core,run_crash,4,[{file,"src/wf_core.erl"},{line,52}]},

                {nitrogen_cowboy,handle,2,

                    [{file,"src/nitrogen_cowboy.erl"},{line,22}]},

                {cowboy_handler,handler_handle,4,

                    [{file,"src/cowboy_handler.erl"},{line,119}]},

                {cowboy_protocol,execute,4,

                    [{file,"src/cowboy_protocol.erl"},{line,523}]}]

[Jesse Gumm]

Thanks, nitrogen_elements isn't supposed to be made as a standalone
project, but there is a nitrogen_elements_examples, which uses
nitrogen_elements to demonstrate the capabilities:

https://github.com/RomanShestakov/nitrogen_elements_examples

But after cloning that, be sure to update cowboy line in rebar.config to:
{cowboy, ".*", {git, "git://github.com/ninenines/cowboy", {tag, "1.0.1"}}},

That *should* work, but again, I haven't played with it in a while,

-Jesse

[Wes James]

Right.  I was going through the example at the bottom of that repo.

-wes

[Jesse Gumm]

Hi Wes,

My apologies for the late night semi-dilirious responses.

As you've noticed, nitrogen_element has not been maintained, and
nitrogen has had a number of new versions since then. The biggest
change was the migration to simple_bridge 2.0, which is what is
throwing the errors in your load process. I'm having a gander at this
now to see if I can put together a quick fix to get it properly
working.

I'll let you know,

-Jesse

[Jesse Gumm]

Hi Wes,

I've done some preliminary reworking to make sure it works with
Nitrogen 2.3, give this a shot:

https://github.com/choptastic/nitrogen_elements_examples

There's much more to do about this, but given the languishment that
nitrogen_elements has had, I think I'm going to take the time to break
it into individual plugins, since they are, on their own, a handful of
completely unrelated elements.

But seeing that your question to Erlang-questions was related to
working with tabs, I made sure the tabs bit works appropriately.

-Jesse

[Wes James]

Thanks Jesse.  I'll take a look at this again.

-wes

[Wes James]

I'm getting this error now:

=INFO REPORT==== 1-Nov-2015::15:17:19 ===

{error,first_request,

    {url,"localhost:8000/"},

    {error,

        {case_clause,{secure,false}},

        [{cow_cookie,setcookie,3,[{file,"src/cow_cookie.erl"},{line,198}]},

         {cowboy_req,set_resp_cookie,4,

             [{file,"src/cowboy_req.erl"},{line,755}]},

         {lists,foldl,3,[{file,"lists.erl"},{line,1262}]},

         {cowboy_simple_bridge,send,5,

             [{file,"src/cowboy_bridge_modules/cowboy_simple_bridge.erl"},

              {line,226}]},

         {cowboy_simple_bridge,build_response,2,

             [{file,"src/cowboy_bridge_modules/cowboy_simple_bridge.erl"},

              {line,175}]},

         {wf_core,run,0,[{file,"src/wf_core.erl"},{line,23}]},

         {cowboy_simple_bridge_anchor,handle,2,

             [{file,

                  "src/cowboy_bridge_modules/cowboy_simple_bridge_anchor.erl"},

              {line,34}]},

         {cowboy_handler,handler_handle,4,

             [{file,"src/cowboy_handler.erl"},{line,111}]}]}}

=INFO REPORT==== 1-Nov-2015::15:17:19 ===

{error,error,

    {case_clause,{secure,false}},

    [{cow_cookie,setcookie,3,[{file,"src/cow_cookie.erl"},{line,198}]},

     {cowboy_req,set_resp_cookie,4,[{file,"src/cowboy_req.erl"},{line,755}]},

     {lists,foldl,3,[{file,"lists.erl"},{line,1262}]},

     {cowboy_simple_bridge,send,5,

         [{file,"src/cowboy_bridge_modules/cowboy_simple_bridge.erl"},

          {line,226}]},

     {cowboy_simple_bridge,build_response,2,

         [{file,"src/cowboy_bridge_modules/cowboy_simple_bridge.erl"},

          {line,175}]},

     {wf_core,run_crash,4,[{file,"src/wf_core.erl"},{line,46}]},

     {cowboy_simple_bridge_anchor,handle,2,

         [{file,"src/cowboy_bridge_modules/cowboy_simple_bridge_anchor.erl"},

          {line,34}]},

     {cowboy_handler,handler_handle,4,

         [{file,"src/cowboy_handler.erl"},{line,111}]}]}

I've tried on mac and centos with otp 17.x and otp 18.x on centos and still get error.

-wes

[Jesse Gumm]

Of course!

I just merged a new secure cookies feature into simple_bridge and sloppily forgot to make sure it works with Nitrogen. I've reverted the merge for now until I figure out what's going on.

Sorry about that! It should work now.

-Jesse

--
Jesse Gumm
Owner, Sigma Star Systems
414.940.4866 || sigma-star.com || @jessegumm

[Wes James]

OK.  Thanks :)

[Wes James]

That worked :)  Thanks for your help with this :))))

-wes