I Added Couchdb Update Function to my Code and is ok But When I use That inside of bot.onText(/^[\/!#]start$/, msg => { I Have This Error:
Unhandled rejection TypeError: alice.update is not a function
at Object.bot.onText.msg [as callback]
How Should I Solve That?
This is My Code:
var nano = require('nano')('http://localhost:5984');
// clean up the database we created previously
nano.db.destroy('alice', function() {
// create a new database
nano.db.create('alice', function() {
var alice = nano.use('alice');
///// update Function
alice.update = function(obj, key, callback){
var db = this;
db.get(key, function (error, existing){
if(!error) obj._rev = existing._rev;
db.insert(obj, key, callback);
});
};
});
});
bot.onText(/^[\/!#]start$/, msg => {
///// using update
var alice = nano.use('alice');
alice.update({ crazay: true }, 'rabbit', function(err, body, header) {
if (err) {
console.log('[alice.insert] ', err.message);
return;
}
console.log('you have updated the rabbit.')
console.log(body);
});
const opts = {
reply_to_message_id: msg.message_id,
reply_markup: JSON.stringify({
keyboard: [['TEST']],
resize_keyboard:true,
one_time_keyboard: true
})
};
bot.sendMessage(msg.chat.id, `Stored In DB`, opts);
});
Solved By Myself, You Should Put Update Function Inside of bot.onText
var nano = require('nano')('http://localhost:5984');
// clean up the database we created previously
nano.db.destroy('alice', function() {
// create a new database
nano.db.create('alice', function() {
var alice = nano.use('alice');
});
});
bot.onText(/^[\/!#]start$/, msg => {
///// using update
var alice = nano.use('alice');
///// update Function
alice.update = function(obj, key, callback){
var db = this;
db.get(key, function (error, existing){
if(!error) obj._rev = existing._rev;
db.insert(obj, key, callback);
});
};
alice.update({ crazay: true }, 'rabbit', function(err, body, header) {
if (err) {
console.log('[alice.insert] ', err.message);
return;
}
console.log('you have updated the rabbit.')
console.log(body);
});
const opts = {
reply_to_message_id: msg.message_id,
reply_markup: JSON.stringify({
keyboard: [['TEST']],
resize_keyboard:true,
one_time_keyboard: true
})
};
bot.sendMessage(msg.chat.id, `Stored In DB`, opts);
});
Related
I am calling a javascript function , which in turn calls a web service;The response of this service is used to call another function which also calls a service. At end of both services we set session attributes. This code gives no errors, but the callback gets called before the service has returned data. The main motive of this code is to set the session attributes before return of flow from this code, when the callback gets called before the service has returned values the session attributes are not set and the requirement of the code is not fulfilled.
'use strict';
function close(sessionAttributes, fulfillmentState, message) {
return {
sessionAttributes,
dialogAction: {
type: 'Close',
fulfillmentState,
message : 'For security purpose answer these questions '
},
};
}
function getSecurityQuestions(intentRequest, context, post_options, callback){
const sessionAttributes = intentRequest.sessionAttributes || {};
var policynumber = sessionAttributes.policynumber;
var interactionID = sessionAttributes.interactionID;
var body = "";
var body2;
const http = require('https');
const promise = new Promise((resolve, reject) => {
const post_data = JSON.stringify({"Purpose":"SecurityQuestions", "InteractionID":interactionID, "SearchStringAcctNum":policynumber});
//ignores SSL
process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";
var post_request = http.request(post_options, function(res) {
res.on('data', function(chunk) {
body += chunk;
});
res.on('end', function() {
context.done(body);
resolve(body);
});
res.on('error', function(e) {
reject(Error(e.message));
context.fail('error:' + e.message);
});
});
// post the data
post_request.write(post_data);
post_request.end();
});
callback( promise.then((body) => {
body2 = JSON.parse(body);
sessionAttributes.question1 = body2.SecurityDetails[0].Question;
close(sessionAttributes, 'Fulfilled');
}, (error) => {
console.log(error.message);
})
);
}
function getInteraction(intentRequest, context, callback) {
const slots = intentRequest.currentIntent.slots;
var policynumber = "PA"+slots.PolicyNumber;
var questionOne = slots.questionOne;
var questionTwo = slots.questionTwo;
const sessionAttributes = intentRequest.sessionAttributes || {};
console.log("policy number : "+policynumber + "question 1 : "+questionOne + "question 2 : "+questionTwo);
sessionAttributes.policynumber = policynumber;
var body = "";
var body2;
// An object of options to indicate where to post to
var post_options = {
host: 'example.com',
protocol: 'https:',
port: '3000',
path: '/hiddenPath',
method: 'POST',
headers: {
'Content-Type': 'application/json'
}
};
const http = require('https');
const promise = new Promise((resolve, reject) => {
const post_data = JSON.stringify({"Purpose":"CreateInteraction"});
//ignores SSL
process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";
var post_request = http.request(post_options, function(res) {
res.on('data', function(chunk) {
body += chunk;
});
res.on('end', function() {
context.done(body);
resolve(body);
});
res.on('error', function(e) {
console.log("rejected here");
reject(Error(e.message));
context.fail('error:' + e.message);
});
});
// post the data
post_request.write(post_data);
post_request.end();
});
callback( promise.then((body) => {
body2 = JSON.parse(body);
console.log("interaction ID : "+body2.InteractionID);
sessionAttributes.interactionID = body2.InteractionID;
getSecurityQuestions(intentRequest, context, post_options, callback);
}, (error) => {
console.log('Promise rejected.');
console.log(error.message);
}));
}
// --------------- Intents -----------------------
/**
* Called when the user specifies an intent for this skill.
*/
function dispatch(intentRequest, context, callback) {
const intentName = intentRequest.currentIntent.name;
if (intentName === 'currIntent') {
return getInteraction(intentRequest, context, callback);
}
throw new Error(`Intent with name ${intentName} not supported`);
}
// --------------- Main handler -----------------------
function loggingCallback(response, originalCallback) {
console.log("logging callback called......");
originalCallback(null, response);
}
exports.handler = (event, context, callback) => {
try {
dispatch(event, context, (response) => loggingCallback(response, callback));
} catch (err) {
callback(err);
}
};
You should resolve your promise only after the request ends.. Have updated your sample below. Hope it helps. Also, you were sending an invalid object as your post body. Fixed that as well.
function getValue(context, post_options, callback) {
var body = "";
var body2;
const http = require('http');
const promise = new Promise((resolve, reject) => {
// INVALID OBJECT
//const post_data = JSON.stringify({"something"});
const post_data = JSON.stringify({
something: "something"
});
//ignores SSL
process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";
var post_request = http.request(post_options, function(res) {
res.on('data', function(chunk) {
body += chunk;
console.log("inside " + JSON.stringify(body));
// DONT RESOLVE HERE, REQUEST IS NOT COMPLETE
//resolve(body);
});
res.on('end', function() {
context.done(body);
//RESOLVE HERE INSTEAD
resolve(body);
});
res.on('error', function(e) {
reject(Error(e.message));
context.fail('error:' + e.message);
});
});
// post the data
post_request.write(post_data);
post_request.end();
});
promise.then((body) => {
console.log("response data " + JSON.stringify(body));
body2 = JSON.parse(body);
callback(delegate(sessionAttributes, intentRequest.currentIntent.slots));
}, (error) => {
console.log('Promise rejected.');
console.log(error.message);
});
}
I have problem with my Lambda, actually in promise nodejs. I have wrote code like this in my Lambda:
'use strict'
const Alexa = require('alexa-sdk');
const mqtt = require('mqtt');
const APP_ID = undefined;
const WELCOME_MESSAGE = 'Welcome to the lamp control mode';
const WELCOME_REPROMT = 'If you new please say help'
const HELP_MESSAGE = 'In this skill you can controlling lamp to turn off or on, dim the lamp, change the lamp color and schedule the lamp';
const STOP_MESSAGE = 'Thanks for using this skill, Goodbye!';
const OFF_RESPONSE = 'Turning off the lamp';
const ON_RESPONSE = 'Turning on the lamp';
const DIM_RESPONSE = 'Dimming the lamp';
const CHANGE_RESPONSE = 'Changing the lamp color';
const AFTER_RESPONSE = 'Wanna control something again ?';
const handlers = {
'LaunchRequest': function () {
this.emit(':ask', WELCOME_MESSAGE, WELCOME_REPROMT);
},
'OnOffIntent' : function () {
var status = this.event.request.intent.slots.status.value;
var location = this.event.request.intent.slots.location.value;
console.log(status);
console.log(location);
if (status == 'on') {
// Promise Start
var mqttPromise = new Promise(function(resolve, reject) {
var options = {
port: '1883',
clientId: 'mqttjs_' + Math.random().toString(16).substr(2, 8),
username: 'username',
password: 'password',
};
var client = mqtt.connect('mqtt://broker-address', options)
client.on('connect', function() {
client.publish("lamp/status", status + ' ' + location, function() {
console.log("Message is published");
client.end();
resolve('Done Sending');
});
});
});
mqttPromise.then(
function(data) {
console.log('Function called succesfully', data);
this.emit(':ask', ON_RESPONSE, AFTER_RESPONSE);
}, function(err) {
console.log('An error occurred: ', err);
}
);
// Promise END
// this.emit(':ask', ON_RESPONSE, AFTER_RESPONSE);
// client.publish("lamp/status", status + ' ' + location);
} else if (status == 'off') {
this.emit(':ask', OFF_RESPONSE, AFTER_RESPONSE);
// client.publish("lamp/status", status + ' ' + location);
}
},
'DimIntent' : function () {
// to do here
},
'ChangeColorIntent' : function () {
// to do here
},
'ShceduleIntent' : function () {
// to do here
},
'AMAZON.HelpIntent': function () {
this.emit(':ask', HELP_MESSAGE, 'Wanna control something ?');
},
'AMAZON.StopIntent': function () {
this.emit(':tell', STOP_MESSAGE);
}
};
exports.handler = function (event, context, callback) {
const alexa = Alexa.handler(event, context, callback);
alexa.APP_ID = APP_ID;
alexa.registerHandlers(handlers);
alexa.execute();
}
I test my code with Service Simulator in Alexa Developer and get this result :
Result Image
So I checked output in Lambda and I got this error report :
Error in Lamda
Can anyone please help me? I have no idea with this because this is my first trial :)
The crux of your error seems to be this specific line in the log:
Cannot read property 'emit' of undefined
And after following the flow of your program, it's likely ocurring here:
mqttPromise.then(
function(data) {
console.log('Function called succesfully', data);
// It's probably ocurring in this line below
this.emit(':ask', ON_RESPONSE, AFTER_RESPONSE);
}, function(err) {
console.log('An error occurred: ', err);
}
)
The log is saying that you tried using this, it's undefined and doesn't have an emit property. Thats ocurring because of how this works in Js. You could workaround this problem by saving a reference to this
var that = this;
var mqttPromise = new Promise(function(resolve, reject) {
var options = {
port: '1883',
clientId: 'mqttjs_' + Math.random().toString(16).substr(2, 8),
username: 'username',
password: 'password',
};
var client = mqtt.connect('mqtt://broker-address', options)
client.on('connect', function() {
client.publish("lamp/status", status + ' ' + location, function() {
console.log("Message is published");
client.end();
resolve('Done Sending');
});
});
});
mqttPromise.then(
function(data) {
console.log('Function called succesfully', data);
that.emit(':ask', ON_RESPONSE, AFTER_RESPONSE);
}, function(err) {
console.log('An error occurred: ', err);
}
);
I would also recommend reading up a bit on "How 'this' works in Javascript"
MDN
Stack Overflow - "how does 'this' work"
I am new to node and async...
I am getting an error saying I can't set headers after they sent when I am sending a response back to api-ai
Any idea why?
Below is the code for function - getUserFirstName(userId, name, callback):
var name = "";
function getUserFirstName(userId, name, callback) {
console.log('withParams function called');
request({
method: 'GET',
uri: "https://graph.facebook.com/v2.6/" + userId + "?fields=first_name,last_name,profile_pic,locale,timezone,gender&access_token=" + FB_PAGE_ACCESS_TOKEN
},
function (error, response) {
if (error) {
console.error('Error while userInfoRequest: ', error);
} else {
if(!typeof response.body != 'object'){
var body = JSON.parse(response.body);
name = body.first_name;
callback(null,name);
}else{
name = response.body.first_name;
callback(null,name);
}
}
});
}
Here is the code being executed:
app.post('/webhook/', (req, res) => {
var data = JSONbig.parse(req.body);
var action = data.result.action;
var facebook_message = [];
if(action == "input.welcome"){
var userId = data.originalRequest.data.sender.id;
async.series([
function(callback) {
getUserFirstName(userId, name, callback);
}
], function(err,results) {
if (results != undefined){ // results = "John"
facebook_message = [{
"text":"Heyyyoo. Welcome!"
}]
}else{
facebook_message = [{
"text":"Hey " + results +"! Welcome!" // Hey John! Welcome!
}]
}
res.json({ // line 308 - error here!
speech: "Greetings",
displayText: "Greetings",
"data": {
"facebook": facebook_message
},
source: "webhook"
});
});
}
// BUNCH OF LONG AND MESSY CODES OVER HERE...
return res.status(200).json({
status: "ok"
});
Error
Error: Cant set headers after they are sent.
at ServerResponse.OutgoingMessage.setHeader (_http_outgoing.js:356:11)
at ServerResponse.header (/app/node_modules/express/lib/response.js:719:10)
at ServerResponse.send (/app/mode_modules/express/lib/response.js:164:12)
at ServerRespose.json (/app/mode_modules/express/lib/response.js:250:15)
at /app/src/app.js: 308:15
at /app/node_modules/async/dist/async.js:3694:9
at /app/node_modules/async/dist/async.js:356:16
at replenish (/app/node_modules/async/dist/async.js:877.25)
at iterateeCallback (/app/node_modules/async/dist/async.js:867:17)
at /app/node_modules/async/dist/async.js:840:16
Remove the following:
return res.status(200).json({
status: "ok"
});
I would use the promises of angularJS to fill data to a grid. I'd like to load data "row by row" as soon as the nodeJS's server, on which use the module "mssql" with the "stream" enabled, back to client every single line from the DB.
On the client side I use these functions:
function asyncGreet() {
var deferred = $q.defer();
var _url = 'http://localhost:1212/test';
$http.get(_url).
then(function(result) {
deferred.resolve(result);
}, function(error) {
deferred.reject(error);
}, function(value) {
deferred.notify(value); //<<-- In "value" I would like to get every single row
});
return deferred.promise;
}
$scope.btnTest = function () {
var promise = asyncGreet();
promise.then(function(res) {
console.log('Success: ' + res.data + "\n");
}, function(reason) {
console.log('Failed: ' + reason);
}, function(update) {
console.log('Got notification: ' + update); //<<--
});
};
On nodeJS server those:
app.get('/test', function (req, res) {
//sql for test
var _query = 'select top 50 * from tb_test';
var sql = require('mssql');
var connection;
var config = {
user: 'testUser',
password: '12345',
server: 'localhost\\test',
database: 'testDB',
stream: true
};
connection = new sql.Connection(config, function (err) {
var request = new sql.Request(connection);
request.query(_query);
request.on('recordset', function(columns) {
// Emitted once for each recordset in a query
//res.send(columns);
});
request.on('row', function(row) {
res.write(JSON.stringify(row)); //<<-- I would like intercept this event on client side
// and get the result in my angularJS function on deferred.notify
});
request.on('error', function(err) {
// May be emitted multiple times
console.error(err)
});
request.on('done', function(returnValue) {
// Always emitted as the last one
res.end('DONE');
});
});
});
Anyone can help me with this?
Thanks!
I'm done it using socket.io :)
On angularJS side:
// count the row for test only
$scope.count = 0;
$scope.prova = function () {
mySocket.emit('getTableByRow', {});
mySocket.on('resRow', function (data) {
if (data.event == 'ROW') {
$scope.count += 1;
}else {
$scope.count += " !!DONE!! ";
}
});
};
On NodeJS side:
[ ... connection with DB ... ]
io.on('connection', function (socket) {
socket.on('getTableByRow', function (data) {
_getTableByRow(socket, data);
});
});
_getTableByRow function:
var _getTableByRow = function (socket, data) {
var _query = 'select top 50 * from tb_test';
request.query(_query);
request.on('row', function(row) {
// return only the ids for test
socket.emit('resRow', {event: 'ROW', data: row.id.toString()});
});
request.on('done', function(returnValue) {
socket.emit('resRow', {event: 'DONE'});
});
request.on('recordset', function(columns) {
console.log(columns);
});
request.on('error', function(err) {
socket.emit('resRow', {event: 'ERROR', data: err});
});
}
In this way, as soon as one row is read from the DB, it is immediately sent to the client :)
This is my code:
var amqp = require('amqp');
var connection = amqp.createConnection( { host: 'localhost' }, { defaultExchangeName: 'testexchange' });
connection.on('ready', function () {
console.log('Connected to rabbitmq');
var exchange = connection.exchange('testexchange', {confirm:true}, function(exch){
console.log('Created exchange: ' + exch.name);
var queue = connection.queue('testqueue', { durable: true }, function(q) {
exch.publish('testqueue', {a:1}, {}, function(error) {
console.log(error);
});
});
});
});
I'm using node 0.10.2 and node-amqp 0.1.6,
I can see textexchange by rabbitmqctl list_exchanges , but there's no testqueue by rabbitmqctl list_queues, what's wrong ?
You have to define it first.
connection.queue('testqueue', { durable: true })