I have used a express get function to view some data. but previous parameters for request are getting stored(caching). So how do I disable caching request parameters for node js + express js. My code is given below
let driverSess;
let arrkey = 'arrkey'; let arrobj = {};
app.get('/getDriverSess', function (reqdr, res) {
var randstr = Math.random().toString(36).slice(2);//GENERATE RANDOM SESSION ID
driv = reqdr.query.driv, vehi = reqdr.query.vehi, imei = reqdr.query.imei;
var randkey = 'sessid'; var randArr = {};
var chk_Sess = drvrApp.chkAppDriverSess(driv, vehi, imei);//CHECK DRIVER SESSION
chk_Sess.then(function (result) {
driverSess = JSON.stringify(result[0].chkSess);
});
console.dir(driverSess);
if (driverSess.includes('success')) {
//save sessid
randArr[randkey] = randstr;
} else if (driverSess.includes('failure')) {
randArr[randkey] = driverSess;
}
arrobj[arrkey] = [randArr];
res.send(arrobj);
});
Related
i am create node js API , getting one problem please let me know solution ,
here is my code
var searchdataArray = [];
SearchData.forEach(function(item){
SearchDataJson.KeyTags = item.hashtags;
// var d = await globalVar.data.trendingPodData();
// console.log(d);
var sql = "SELECT email , mobile from user_profile where id=228 limit 2";
pool.query(sql, function (err, result, fields) {
var myJSON = JSON.stringify(result);
var array = JSON.parse(myJSON);
SearchDataJson.Data = array;
searchdataArray.push(SearchDataJson);
console.log(searchdataArray);
});
});
my requirement is getting searchdataArray variable out side the poo.query function.
I have a cloud function. It is triggered by an App Engine Cron job. It triggers my Firebase Cloud Function every hour with a Google Cloud Pub/Sub. I fetch my Firebase Realtime Database once, and loop for every value. The problem is my main.async function called multiple times. I use an i variable for loop and my console logs more i count than my database length. I mean that if my database length is 4, but for loop runs 8 or 15 or 23 times. This values change randomly. I want to loop for my each database value,fetch some data on internet,and when it is done, go for next value. Here is the code:
use strict';
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
var request = require('request-promise').defaults({ encoding: null });
var fs = require('fs');
// Get a reference to the Cloud Vision API component
const Vision = require('#google-cloud/vision');
const vision = new Vision.ImageAnnotatorClient();
var os = require("os");
var databaseArray = [];
var uniqueFilename = require('unique-filename')
exports.hourly_job = functions.pubsub
.topic('hourly-job')
.onPublish((event) => {
console.log("Hourly Job");
var db = admin.database();
var ref = db.ref("myData")
ref.once("value").then(function(allData) {
allData.forEach(function(deviceToken) {
deviceToken.forEach(function(firebaseIDs) {
var deviceTokenVar = deviceToken.key;
var firebaseIDVar = firebaseIDs.key;
var firstvalue = firebaseIDs.child("firstvalue").val();
var secondvalue = firebaseIDs.child("secondvalue").val();
var items = [deviceTokenVar, firebaseIDVar, firstvalue, secondvalue];
databaseArray.push(items);
});
});
return databaseArray;
}).then(function (databasem) {
main().catch(console.error);
});
return true;
});
const main = async () => {
var i;
for (i = 0; i < databaseArray.length; i++) {
console.log("Database Arrays " + i + ". elements: ");
if (databaseArrayfirst != "") {
var apiUrl = "http://api.blabla;
try {
const apiBody = await request.get(apiUrl);
///////////////////////////vison start//////////////////////
const visionResponseBody = await vision.documentTextDetection(apiBody)
var visionResponse = visionResponseBody[0].textAnnotations[0].description;
...some logic here about response...
/////////////////////////////////////////////////
var getdatabasevar = await admin.database().ref("myData/" + databaseArrayDeviceToken + "/" + databaseArrayFirebaseID);
await getdatabasevar.update({
"firstvalue": visionResponse
});
/////////////////////////////////////////////////
} catch (error) {
console.error(error);
}
///////////////////////////vison end//////////////////////
}
};
return true;
};
Thank you.
I develop for Firebase Cloud Functions. I have a Firebase Realtime Database like this:
----- myData
-------eqewrwrepere (this one is a device token)
---------Lta+sde-fer (this one is a firebase id)
firstvalue : "a"
secondvalue : "b"
----------Qrgd+ad-qdda (this one is second firebase id)
firstvalue : "c"
secondvalue : "d"
-------eqwerSAsdqe (this one is another device token)
---------Lta+sde-fer (this one is a firebase id)
firstvalue : "x"
secondvalue : "y"
----------Qrgd+ad-qdda (this one is second firebase id)
firstvalue : "z"
secondvalue : "t"
I fetch these data by this code. With this code i fetch all data and put them an array. And when fetching done, i loop this array for finding items. I am an iOS developer, so i am a newbie for NodeJS. Here is what i want to do:
Get firstvalue for each database data.
Make a api request with firstvalue of each database data.
Api returns an image.
Write image temp directory.
Process this image for visionApi.
Extract text.
Update database.
Send notification for deviceToken
Now i am able to retrieve database items in my array. When i make a request in for loop, request called async. So for loop continues, but request response or writing file and vision processing executed only once.
In for loop, get databasearray[0], make request, write file, process it with vision api, update database and go for next databasearray[1] item.
I read about Promises on different pages. But i did not understand.
Thank you.
'use strict';
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
var request = require('request');
var fs = require('fs');
//var fs = require("fs");
// Get a reference to the Cloud Vision API component
const Vision = require('#google-cloud/vision');
const vision = new Vision.ImageAnnotatorClient();
// Imports the Google Cloud client library
//const {Storage} = require('#google-cloud/storage');
var fs = require("fs");
var os = require("os");
var databaseArray = [];
exports.hourly_job = functions.pubsub
.topic('hourly-job')
.onPublish((event) => {
console.log("Hourly Job");
var db = admin.database();
var ref = db.ref("myData")
ref.once("value").then(function(allData) {
allData.forEach(function(deviceToken) {
deviceToken.forEach(function(firebaseIDs) {
var deviceTokenVar = deviceToken.key;
var firebaseIDVar = firebaseIDs.key;
var firstvalue = firebaseIDs.child("firstvalue").val();
var secondvalue = firebaseIDs.child("secondvalue").val();
var items = [deviceTokenVar, firebaseIDVar, firstvalue, secondvalue];
databaseArray.push([...items]);
});
});
return databaseArray;
}).then(function(databasem) {
var i;
for (i = 0; i < databaseArray.length; i++) {
var databaseArrayDeviceToken = databaseArray[i][0];
console.log("DeviceToken: " + databaseArrayDeviceToken);
var databaseArrayFirebaseID = databaseArray[i][1];
console.log("FirebaseID: " + databaseArrayFirebaseID);
var databaseArrayfirstvalue = databaseArray[i][2];
console.log("firstval: " + databaseArrayfirstvalue);
var databaseArraysecondval = databaseArray[i][3];
console.log("Second: " + databaseArraysecondval);
var url = "http://api.blabla" + databaseArrayfirstvalue;
/////////////here make a request, pause loop, process returned image, but how //////////////////////
request.get({
url: url,
encoding: 'binary'
}, function(error, httpResponse, body) {
if (!error && httpResponse.statusCode == 200) {
fs.writeFileSync('/tmp/processed.jpg', body, 'binary')
console.log("file written");
})
}
});
return true;
});
I found solution with Mocas helps. Here is the solution. I use async/await functions in code. Now for loop waits for the function response. But now I have different problems. I think main async function hangs because of awaits. And then next hourly trigger, it runs again. So console log shows 15-16-17 or more ‘i’ values in for loop. I have 4 element in database array but console log shows more than this every hour. And it increases every time. So I guess that I should cancel this await functions after a timeout. But I don’t know how. Here is code:
use strict';
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
var request = require('request-promise').defaults({ encoding: null });
var fs = require('fs');
// Get a reference to the Cloud Vision API component
const Vision = require('#google-cloud/vision');
const vision = new Vision.ImageAnnotatorClient();
var os = require("os");
var databaseArray = [];
var uniqueFilename = require('unique-filename')
exports.hourly_job = functions.pubsub
.topic('hourly-job')
.onPublish((event) => {
console.log("Hourly Job");
var db = admin.database();
var ref = db.ref("myData")
ref.once("value").then(function(allData) {
allData.forEach(function(deviceToken) {
deviceToken.forEach(function(firebaseIDs) {
var deviceTokenVar = deviceToken.key;
var firebaseIDVar = firebaseIDs.key;
var firstvalue = firebaseIDs.child("firstvalue").val();
var secondvalue = firebaseIDs.child("secondvalue").val();
var items = [deviceTokenVar, firebaseIDVar, firstvalue, secondvalue];
databaseArray.push([...items]);
//console.log(databaseArray);
//return true;
});
//return true;
});
return databaseArray;
}).then(function (databasem) {
main().catch(console.error);
});
return true;
});
const main = async () => {
var i;
for (i = 0; i < databaseArray.length; i++) {
console.log("Database Arrays " + i + ". elements: ");
var databaseArrayDeviceToken = databaseArray[i][0];
console.log("DeviceToken: " + databaseArrayDeviceToken);
var databaseArrayFirebaseID = databaseArray[i][1];
console.log("FirebaseID: " + databaseArrayFirebaseID);
var databaseArrayfirst = databaseArray[i][2];
console.log("first: " + databaseArrayfirst);
var databaseArraysecond = databaseArray[i][3];
console.log("second: " + databaseArraysecond);
if (databaseArrayfirst != "") {
var apiUrl = "http://api.blabla;
try {
const apiBody = await request.get(apiUrl);
///////////////////////////vison start//////////////////////
const visionResponseBody = await vision.documentTextDetection(apiBody)
var visionResponse = visionResponseBody[0].textAnnotations[0].description;
console.log("Vision response text " + visionResponse );
...some logic here about response...
/////////////////////////////////////////////////
var getdatabasevar = await admin.database().ref("myData/" + databaseArrayDeviceToken + "/" + databaseArrayFirebaseID);
await getdatabasevar.update({
"firstvalue": visionResponse
});
/////////////////////////////////////////////////
var getanotgerdatabasevar = await admin.database().ref("myData/" + databaseArrayDeviceToken + "/" + databaseArrayFirebaseID + "/" + "secondvalue");
await getanotgerdatabasevar.once("value")
.then(function(var) {
..some logic..
//send notification
});
} catch (error) {
console.error(error);
}
///////////////////////////vison end//////////////////////
}
};
return true;
};
I want to communicate from backend with the calendar using caldav of zoho mail using nodejs. Could anyone suggest me how to implement it?
I am using plugin node-caldav-mod
I tried this piece of code which doesn't seem to be working.
var caldav = require("node-caldav-mod");
var moment = require('moment-timezone');
var express = require('express');
var app = express();
var xmljs = require("libxmljs");
var https = require("https");
var CalendarId = "2123123123";
var url = "https://calendar.zoho.com/caldav/{CalendarId}/events";
var username = "username"
var password = "password"
var timeFormat = "YYYYMMDDTHHmms";
var getTodayEvent = function (callback){
var startDate = moment().set({'hour': 0,'minute': 0,'second': 0}).format(timeFormat) + "Z";
var endDate = moment().set({'hour': 23,'minute': 59,'second': 59}).format(timeFormat) + "Z";
var output = {};
output.startDate = startDate;
output.endDate = endDate;
caldav.getEvents(url, username, password, startDate, endDate, function(response){
console.log(response);
callback(response);
});
}
var findPropertyNameByRegex = function(o, r) {
var key;
for (key in o) {
if (key.match(r)) {
return key;
}
}
return undefined;
};
function compare(a,b) {
var startDate_a = findPropertyNameByRegex(a, "DTSTART");
var startDate_b = findPropertyNameByRegex(b, "DTSTART");
if (a[startDate_a] < b[startDate_b])
return -1;
else if (a[startDate_a] > b[startDate_b])
return 1;
else
return 0;
}
app.get('/today',function(req, res){
getTodayEvent(function(events){
events.sort(compare);
res.send("Communication set up properly!")
})
});
This is the error which I am getting
Parsing.....
undefined
Error parsing response
TypeError: Cannot read property 'D:multistatus' of undefined
Could somebody tell me what's wrong with this code?
Could somebody tell me what's wrong with this code?
Yes. Your error seems to come from
this line
in the module you seem to use:
var data = result['D:multistatus']['D:response'];
Which is utter non-sense. D: is just a namespace prefix and can be anything the server chooses.
A CalDAV client needs to properly parse and process XML namespaces.
Solution: Use a proper module, or just write it on your own.
I have GRPC server running using openssl - static way and I am trying to connect to server using nodejs client
I do not see any error but I do not see its connecting to server either.
Please share if you have any sample.
Please refer code below:
var rootCertPath = path.join('.','.', 'server-root.PEM');
var privateCertPath = path.join('.','.', 'server-private.PEM');
var domainCertPath = path.join('.','.', 'server-domain.PEM');
var rootCert = fs.readFileSync(rootCertPath);
var privateCert = fs.readFileSync(privateCertPath);
var domainCert = fs.readFileSync(domainCertPath);
var buf1 = new Buffer('rootCert');
var buf2 = new Buffer('privateCert');
var buf3 = new Buffer('domainCert');
var chat_proto = grpc.load("Chat.proto").com.company.grpc;
var client = new chat_proto.ChatService('https://servervip:443',grpc.credentials.createSsl(buf1,buf2,buf3));
Chat.proto
syntax = "proto3";
// Service definition.
service ChatService {
// Sends a chat
rpc chat(stream ChatMessage) returns (stream ChatMessageFromServer) {}
}
// The request message containing the user's name.
message ChatMessage {
string name = 1;
string message = 2;
}
// The response message containing the greetings
message ChatMessageFromServer {
string name = 1;
string message = 2;
}
//Code to make a request
var username = process.argv[2];
var stdin = process.openStdin();
function main() {
console.log("starting");
console.log(client); // prints { '$channel': Channel {} }
var chat=client.chat();
chat.on('data', function(msg) {
console.log(msg.name + ': ' + msg.message);
console.log("after message");
});
stdin.addListener('data',function(input) {
chat.write({ name: username, message: input.toString().trim()
});
});
}
main();
so good new is - below thing worked for me
var rootCertPath = path.join('.','.', 'roots.PEM');
var rootCert = fs.readFileSync(rootCertPath);
var chat_proto = grpc.load("Chat.proto").com.americanexpress.grpc.chat;
var client = new chat_proto.ChatService('servervip:443',grpc.credentials.createSsl(rootCert));
Looks like an issue with the cert - I used the default roots.PEM in grpc client and it worked for me. will look internally to have correct root of my servervip CA certificate chain.
Thanks all for your support