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I've been using the JSON header via CGI::Application::Plugin::JSON to send data from a CGI::Application webapp. Say you have a runmode called "blackout". Here's an untested sketch:

sub blackout { my $self = shift; my $message = 'hi!'; $self->header_add(-type=>"text/plain"); my $query = $self->query(); my $output = $query->start_html(); $output .= $query->span($message); $self->add_json_header(boStatus=>'OK'); $self->add_json_header(boError=>'SUCCESS'); $self->add_json_header(boMessage=>$message); $output .= $query->end_html; return $output; }
Notice the span tag: I couldn't find a way to get it working without putting someting in the body of the page, so I just stuck the message in there. Figured it would at least mean something if it ever got displayed by a browser.

Now on the other end, I'm using the prototype library to get the JSON out of the header.

I don't know how to do Ajax without prototype, so this is the best I can give you.

function tryJSON(app) { var url = '/cgi-bin/TryCGIApp.cgi'; var params = "mode=blackout"; new Ajax.Request(url, { onSuccess : function(resp,jsonheader) { var foo = jsonheader.boStatus; var funk = jsonheader.boError; alert("The response from the server is: " + foo + " and " ++ funk); }, onFailure : function(resp) { alert("Oops, there's been an error."); }, parameters : params }); }

I assume there's some way to reverse this process, with the javascript adding the JSON headers, but I haven't gotten that far yet...If you get it, please post!

Update:  explicitly mention CGI::Application::Plugin::JSON

non-Perl: Andy Ford


In reply to Re: Reading Raw data in CGI::Application by andyford
in thread Reading Raw data in CGI::Application by BaldPenguin

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