Hey I'm trying to have the website I'm making send a cookie to the user then display a webpage.
So I've found http://alexmarandon.com/articles/mochiweb_tutorial/ as the only real tutorial about how make a cookie but it seems to error out for me.
My loop looks something like this (my make_cookie, get_cookie_value, render_ok and get_username are the same as his except I use 'mename' as the key instead of 'username') :
loop(Req, DocRoot) ->
"/" ++ Path = Req:get(path),
try
case dispatch(Req, valid_urls:urls()) of
none ->
case filelib:is_file(filename:join([DocRoot, Path])) of
true ->
%% If there's a static file, serve it
Req:serve_file(Path, DocRoot);
false ->
%% Otherwise the page is not found
case Req:get(method) of
Method when Method =:= 'GET'; Method =:= 'HEAD' ->
case Path of
"response" ->
QueryStringData = Req:parse_qs(),
Username = get_username(Req, QueryStringData),
Cookie = make_cookie(Username),
FindCookie = get_cookie_value(Req,"mename","Not Found."),
% render_ok(Req, [Cookie], greeting_dtl, [{username, Username}]),
Req:respond({200, [{"Content-Type", "text/html"}],
"<html><p>Webpage</p></hmtl>"});
_ ->
Req:not_found()
end
end
end;
Response ->
Response
end
catch
Type:What ->
Report = ["web request failed",
{path, Path},
{type, Type}, {what, What},
{trace, erlang:get_stacktrace()}],
error_logger:error_report(Report),
%% NOTE: mustache templates need \ because they are not awesome.
Req:respond({500, [{"Content-Type", "text/plain"}],
"request failed, sorry\n"})
end.
The error I get is:
[error] "web request failed", path: "response", type: error, what: undef, trace: [{greeting_dtl,render,[[{username,"GET"}]],[]}
The error seems to be coming from render_ok, but being new to Erlang-mochiweb I'm not sure on how to fix this.
You have render_ok commented out, but the file was not compiled after that. The error message suggests, that it still calls greeting_dtl.
I assume you are using erlydtl, because the error is in greeting_dtl. Errors in render function usually mean, that you misspelled some property name. Check, where your template is and if it has something like {{ something.username }}. Comment it out or change to mename (whatever makes sense).