How to write azure functions which will use express api - node.js

Question

I have a azure function,
In index.js i have the following code
module.exports = function (context, req) {
const createHandler = require('azure-function-express').createHandler;
const app = require('express')();
app.get("/home", (req, res) => {
const y = { "name": "name", "dob": "ddmmyyyy" }
context.res = y
context.done()
});
module.exports = createHandler(app);
context.done();
};
i have function.json :
{
"bindings": [
{
"authLevel": "anonymous",
"type": "httpTrigger",
"direction": "in",
"name": "req",
"route": "{*segments}"
},
{
"type": "http",
"direction": "out",
"name": "res"
}
],
"disabled": false
}
i have the above files in my azure function but i am not able get any output i just a blank page if i hit the api end point.
i have to use express to handle many other end points is there any way to handle in azure functions.
when i use nodejs local application setup, i am able to use express and handle many api end points with in a single module is that possible in azure functions? or i have to use different functions for each end point

Answer 1

See code below. We can use Azure function as a common express app.
const createHandler = require('azure-function-express').createHandler;
const app = require('express')();
app.get("/home", (req, res) => {
res.json({ "name": "name", "dob": "ddmmyyyy" });
});
app.get("/work", (req, res) => {
res.json({ "name": req.query.name, "dob": "ddmmyyyy" });
});
module.exports = createHandler(app);
module.exports = function (context, req) and context.done() are no longer useful if azure-function-express is in use. If you want to use other method of context, use req.context instead. See azure-function-express module doc.
Besides, Azure function has a prefix "api" in route by default, if you don't need it(like code above), change it to empty your host.json.
If your function runtime is ~2(beta).
{
"version": "2.0",
"extensions": {
"http": {
"routePrefix": ""
}
}
}
Else in ~1
{
"http": {
"routePrefix": ""
}
}

Answer 2

I have also use try this azure-function-express package but its still in the development and need a-lot of improvement. The best package i found is Azure AWS Severless Express
Package. Its very easy to use and compatible. You can easily use the Express with azure functions