I've written the following piece of code in my nodeJS/Expressjs server:
app.post('/settings', function(req, res){
var myData = {
a: req.param('a')
,b: req.param('b')
,c: req.param('c')
,d: req.param('d')
}
var outputFilename = 'config.json';
fs.writeFile(outputFilename, JSON.stringify(myData, null, 4), function(err) {
if(err) {
console.log(err);
} else {
console.log("Config file as been overwriten");
}
});
});
This allows me to get the submitted form data and write it to a JSON file.
This works perfectly. But the client remains in some kind of posting state and eventually times out. So I need to send some kind of success state or success header back to the client.
How should I do this?
Thank you in advance!
Express Update 2015:
Use this instead:
res.sendStatus(200)
This has been deprecated:
res.send(200)
Just wanted to add, that you can send json via the res.json() helper.
res.json({ok:true}); // status 200 is default
res.json(500, {error:"internal server error"}); // status 500
Update 2015:
res.json(status, obj) has been deprecated in favor of res.status(status).json(obj)
res.status(500).json({error: "Internal server error"});
In express 4 you should do:
res.status(200).json({status:"ok"})
instead of the deprecated:
res.json(200,{status:"ok"})
Jup, you need to send an answer back, the simplest would be
res.send(200);
Inside the callback handler of writeFile.
The 200 is a HTTP status code, so you could even vary that in case of failure:
if (err) {
res.send(500);
} else {
res.send(200);
}
Related
This is my first Google Action project. I have a simple slot after the invocation. User enters the value on prompt and slot invokes the webhook and make a call to API using the user input. All works fine. However the webhook returns to users even before the API call finish processing and returns the value (line 1 conv.add). I do see in the logs that everything from API is logged fine after the webhook returns to user. Below is the code I am using. I am using inline editor. What am I missing? Thanks for help in advance.
const { conversation } = require('#assistant/conversation');
const functions = require('firebase-functions');
var https = require('https');
const fetch = require('node-fetch');
const app = conversation({debug: true});
app.handle('SearchData', conv => {
const body = JSON.stringify({
val: "this is my body"
});
// prepare the header
var postheaders = {
'Content-Type' : 'application/json',
'Auth' : 'MyAuthCreds'
};
fetch('https://host.domain.com/data', {
method: 'post',
body: body,
headers: postheaders,
})
.then(res => res.json())
.then(d => {
console.log(d);
var profile = d;//JSON.parse(d);
console.log(d.entries);
console.log("Length: "+ d.entries.length);
if(d.entries.length > 0)
{
console.log("Data found");
conv.add("Data found"); //line 1
}
else
{
console.log("no data found");
conv.add("no data found"); //line 1
}
})
.catch(function (err) {
// POST failed...
console.log(err);
});
});
exports.ActionsOnGoogleFulfillment = functions.https.onRequest(app);
Your issue is that your handler is making API calls which are asynchronous, but the Assistant Conversation library doesn't know that you're doing so. So as soon as the handler finishes, it tries to send back a response, but your asynchronous responses (the stuff in the then() blocks) haven't executed yet.
To address this, you need to return a Promise object so the library knows to wait till the Promise is fulfilled before it returns.
Fortunately, in your case, this should be pretty straightforward. fetch and all the .then() blocks return a Promise. So all you need to do is add a return statement in front of the call to fetch. So something like this:
return fetch('https://host.domain.com/data', {
I am running an automation script. We have a scenario where Java makes a callback REST call to UI. Below is the code where am doing httpGet to that URL. I want to know when the response comes. If it comes how to know that. I searched a lot I din't find a clear answer anywhere. Please give some hints!
http.get(siteUrl, function(response) {
var bodyString = '';
response.setEncoding('utf8');
response.on("data", function(chunk) {
bodyString += chunk;
});
response.on('end', function() {
defer.fulfill({
statusCode: response.statusCode,
bodyString: bodyString
});
});
}).on('error', function(e) {
defer.reject("Got http.get error: " + e.message);
});
//If we are sure that response has come, then extract it
httpGet("http://testurl").then(function(result) {
//alert('inside test automation');
console.log(result);
});
You can use the response detail whether success or fail with "response code", there are lots of way using interface as callback, using methods by checking response code, lots of network library available - volley, okhttp rest client etc...
help : response code detail
if(response.statusCode == 200) {
// do success work read response etc...
// you can call methods what you want if success happen
} else {
// you can check other status code too..
// call methods if api get fail.
}
Hope this would help
good luck.
I'm calling a Rest API that returns at least 2 success status codes .
A normal 200 OK and a 202 Accepted status code.
Both return a Content in the body.
If I execute in postman my calls I might get something like
Status code: 202 Accepted. With Body "Queued" or some other values
or
Status code: 200 OK. With Body "ValueOfSomeToken"
Making the call with axios in my nuxt app:
this.$axios.$get('/Controller/?id=1')
.then((response)=>{
if(response=='Queued'){
//Do something
}
else if (response=='Expired'){
//Do something
}
else{
//Do something
}
})
.catch((error)=>{
console.log(error);
});
..works, but I actually would like to get the status code (because 202 has other values for the body responses)
I have no idea how to read the status codes.
I tried using (response,code) =>... but code is then nothing.
You can use non $-prefixed functions like this.$axios.get() instead of this.$axios.$get() to get the full response
// Normal usage with axios
let { data } = await $axios.get('...'));
// Fetch Style
let data = await $axios.$get('...');
(source)
You can extract the status codes from the response object in axios
if you print the response object (as shown in below image) you can see the all the objects inside the response object. One among them is status object
response.status will give you the status code that is sent from the server
axios.get("http://localhost:3000/testing").then((response)=>{
console.log("response ",response);
if(response.status == 200){
//do something
}
else if(response.status == 202){
//do something
}
else if(response.status == 301){
//do something
}
}).catch((err)=>{
console.log("err11 ",err);
})
In the server side, you can explicitly send any status code using res.status() method, for more details refer this documentation
app.get('/testing',(req, res)=> {
res.status(202).send({"res" : "hi"});
});
Update:
By default, #nuxtjs/axios returns response.data in the .then((response))
The $axios.onResponse event will have access to the complete response object.
You need to setup an interceptor to intercept the $axios.onResponse event and modify the response object
Under plugin directory create a plugin, plugin/axios.js
Update the plugins section plugins : ['~/plugins/axios']
in nuxt.config.js
export default function ({ $axios, redirect }) {
$axios.onResponse(res=>{
console.log("onResponse ", res);
res.data.status = res.status;
return res;
})
}
In the res object in this interceptor you will have the all the values (as it is shown in my first screenshot). But this res object is not returned as it is, only res.data is returned to our program.
We can update contents inside res.data and then return the res object as shown in my program res.data.status = res.status; .
Now when axios returns res.data we will have access to res.data.status value in response object in the .then((response)) promise
You can access the status using response.status inside this.$axios
this.$axios.$get("url").then((response) =>{
console.log("status ",response.status);
}).catch((err) => {
console.log("res err ",err);
});
Apigee's push notification is documented here.
http://apigee.com/docs/api-baas/content/introducing-push-notifications
I tried this with the js sdk that Apigee provides here http://apigee.com/docs/app-services/content/installing-apigee-sdk-javascript. It looks like only the client can generate a notification to itself?
But I have a scenario where I would like to push notifications to multiple clients from a nodejs job that runs once every hour. Something like this, but from the nodejs sdk not from the js sdk.
var devicePath = "devices;ql=*/notifications";
How do I do this?
As remus points out above, you can do this with the usergrid module (https://www.npmjs.com/package/usergrid).
You are basically trying to construct an API call that looks like this (sending a message by referencing a device):
https://api.usergrid.com/myorg/myapp/devices/deviceUUID/notifications?access_token= access_token_goes_here '{"payloads":{"androidDev":"Hello World!!"}}'
Or like this (sending a message by referencing a user who is connected to a device)
https://api.usergrid.com/myorg/myapp/users/fred/notifications?access_token=access_token_goes_here '{"payloads":{"androidDev":"Hello World!!"}}'
You can do this with code that looks something like this:
var options = {
method:'POST',
endpoint:'devices/deviceUUID/notifications',
body:{ 'payloads':{'androidDev':'Hello World!!'} }
};
client.request(options, function (err, data) {
if (err) {
//error - POST failed
} else {
//data will contain raw results from API call
//success - POST worked
}
});
or
var options = {
method:'POST',
endpoint:'users/fred/notifications',
body:{ 'payloads':{'androidDev':'Hello World!!'} }
};
client.request(options, function (err, data) {
if (err) {
//error - POST failed
} else {
//data will contain raw results from API call
//success - POST worked
}
});
Note: the second call, that posts to the users/username/notifications endpoint assumes that you have already made a connection between the user and their device (e.g. POST /users/fred/devices/deviceUUID).
I am using sailsjs v0.10.5.
I am trying to redirect to login after verifying user email and update the database before redirect.
I am using redirection in my update callback. But it sending the error after updating the database
'Cant send headers after they are sent'.
The following is the code am using for redirection:
verifyEmail: function(req, res){
var userId = req.param('userId');
User.update({id: userId},{isVerified: true}).exec(function(err, user) {
if (!err) {
req.flash('error', 'Your email is verified please login');
res.redirect('/login'); }else { return res.send(user, 400); }
});
Update waterline function is asynchronous, are you sure there isnt some res method later in the scope that may be fired before?
Its recommended to use return res.* for so-called "terminal methods" see http://sailsjs.org/#/documentation/reference/res/res.forbidden.html?q=notes