I am trying to do something seemingly very simple but I'm having trouble working it out. Users can submit some text using a HTML form with POST method. This is then sent off to an API for processing, and returns with a JSON object. I then just want the app.js file to send this JSON object back so I can play around with it using JQuery.
Here is the .post method in my app.js
app.post('/', function(req, res){
console.log("starting app.post");
// See User Modeling API docs. Path to profile analysis is /api/v2/profile
// remove the last / from service_url if exist
var parts = url.parse(service_url.replace(/\/$/,''));
var profile_options = { host: parts.hostname,
port: parts.port,
path: parts.pathname + "/api/v2/profile",
method: 'POST',
headers: {
'Content-Type' :'application/json',
'Authorization' : auth }
};
// create a profile request with the text and the https options and call it
create_profile_request(profile_options,req.body.content)(function(error,profile_string) {
if (error) {res.render('home.html',{'error': error.message});
console.log("errormessage: "+error.message);
}
else {
// parse the profile and format it
var profile_json = JSON.parse(profile_string);
var flat_traits = flatten.flat(profile_json.tree);
// Extend the profile options and change the request path to get the visualization
var fileName="file 1"; //this will eventually be imported automatically
//console.log(flat_traits);
var scoreObject={"title":fileName, "percentage":functions.matchPercentage(flat_traits)}
res.send(scoreObject); //this is what I assume should send this back client-side
});
}
});
});
// creates a request function using the https options and the text in content
// the function that return receives a callback
var create_profile_request = function(options,content) {
return function (/*function*/ callback) {
// create the post data to send to the User Modeling service
var post_data = {
'contentItems' : [{
'userid' : 'dummy',
'id' : 'dummyUuid',
'sourceid' : 'freetext',
'contenttype' : 'text/plain',
'language' : 'en',
'content': content
}]
};
// Create a request to POST to the User Modeling service
var profile_req = https.request(options, function(result) {
result.setEncoding('utf-8');
var response_string = '';
result.on('data', function(chunk) {
response_string += chunk;
});
result.on('end', function() {
if (result.statusCode != 200) {
var error = JSON.parse(response_string);
console.log("status: "+result.statusCode);
callback({'message': error.user_message}, null);
console.log(error.user_message);
} else
callback(null,response_string);
});
});
profile_req.on('error', function(e) {
callback(e,null);
});
profile_req.write(JSON.stringify(post_data));
profile_req.end();
}
};
So I presume res.send is what passes the data across to the client-side, but then how do I receive the data on the client-side? This is my attempt at the JScript:
$.getJSON('/').done(function(data){
$('#resultsList').append('<li data-icon="arrow-r" data-iconpos="right" id="'+
data.title+'"> <a href="#breakdownDialog"> <div id="cvResults"><h3>'+
data.title+'</h3> <span>'+data.percentage+
'%</span></div></a><div id="output"></div></li>');
console.log(data.title+data.percentage);
}
});
I want to take some of the values from the JSON object and put them in a list on the existing HTML page. At the moment this just takes me to a different blank page that says Undefined.
How should I grab the JSON data from the server?
EDIT: Here's the HTML form I am submitting the data with:
<form method="POST" id="submitForm">
<fieldset>
<textarea id="textArea" required="true" rows="5" name="content"></textarea>
<button class="btn btn-block" type="submit">
Analyse
</button>
</fieldset>
</form>
res.json