An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details. You can do this from the Heroku CLI with the command

Following is the error log

2020-05-18T20:43:04.724323+00:00 app[web.1]:
2020-05-18T20:43:04.724420+00:00 app[web.1]: events.js:72
2020-05-18T20:43:04.724667+00:00 app[web.1]: throw er; // Unhandled ‘error’ event
2020-05-18T20:43:04.724691+00:00 app[web.1]: ^
2020-05-18T20:43:04.725969+00:00 app[web.1]: Error: connect ECONNREFUSED
2020-05-18T20:43:04.725970+00:00 app[web.1]: at errnoException (net.js:905:11)
2020-05-18T20:43:04.725972+00:00 app[web.1]: at Object.afterConnect [as oncomplete] (net.js:896:19)

Hello Jitendra,

Thanks for this wonderful article. I’m new to Node/expressJS.
When try i to access external website (salesforce Marketing cloud) using index.html and App.js i’m not able to
1) pass the http request from index.html to App.js 2) hence i have http request code in App.js. 3) i’m able to get the response from SFMC but not able to pass the same to index.html to parse and display.

Index.html code:
$scope.getAllRec = function(){
$http ({
method: ‘GET’,
url: ‘/hub/v1/campaigns’,
//url: ‘https://www.exacttargetapis.com/hub/v1/campaigns’,
headers: { ‘Authorization’: ‘Bearer ‘abc’, ‘content-type’: ‘application/json’ }
}). success(function(data, status)
{ console.log (‘success: str form for JSON: ‘ + data);
alert(‘AngularJS success scope: ‘);
$scope.dataset = JSON.parse(data);
alert($scope.dataset);
}). error(function(data, status)
{ console.log (‘error: str form for JSON: ‘ + data);
alert(‘AngularJS error scope: ‘);
$scope.dataset = data || “Request failed “;
alert($scope.dataset);
}); //end of error fun
} //end of function

App.js code:
app.get(‘/hub/v1/campaigns’, function(req, res)
{
request ({
uri: ‘https://www.exacttargetapis.com/hub/v1/campaigns’,
headers: { ‘Authorization’: ‘Bearer 7AN0d9ntuWA9tYSHvbziJG6Q’, ‘content-type’: ‘application/json’}
},
function(error, response, body)
{
if (!error && res.statusCode === 200)
{
res.writeHead(200, {‘Content-Type’: ‘text/plain’});
res.write(JSON.stringify( body, null, ” “));
console.log(body);
res.sendfile(‘views/index.html’);
res.end();

}
else
{
res.json (error);
}

console.log(‘Original URL is: ‘+ req.originalUrl); // ‘/admin/new’
console.log(‘Base URL is: ‘, req.baseUrl); // ‘/admin’
console.log(‘Path is: ‘ + req.path);

});

//function replacer(key, value) {
// return key.replaceAll(/\\/g,”);
//}

} );

May be an example of how to access external site and pass the json response to html/view will help a lot get going.

Regards,
Suresh

Thanks for this great article. But, i could not run the passing datas from the html page to database. I test dbOperations with url get requests and it works properly. But, html apge does not call dbOperations. Do you have any suggestions? Should i change sometings in ‘index.html’?

Thanks again.

Yeah, I installed manually, we need it in Package.json.

https://github.com/JitendraZaa/node-postgres/tree/master/node_modules

After series of test, I was able to actually find out the issue. I changed the port number and also I found out that in code I used var dbOperations which is case sensitive. but after changing the file name to which I was using, I was finally able to run the app at server. Thank so much for the excellent post to get introduced to node Js

Hi Sohit,
Did you tried to fetch heroku log for errors ? What error you are getting ?

Error: Cannot find module ‘./dbOperations.js’

I have removed .js extension still getting the same error. Please help how to solve this error.