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server.js
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server.js
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#!/usr/bin/env node
var amqp = require('amqplib');
var express = require('express');
var bodyParser = require('body-parser');
var uuid = require('uuid/v4');
var app = express();
app.use(express.static(__dirname));
app.use(bodyParser.urlencoded({extended: true}));
var uri = process.env.RABBITMQ_URI || 'amqp://localhost';
var reqQueue = 'sent2vec-client-to-server';
var resQueue = 'sent2vec-server-to-client';
var channel = null;
var messages = {};
amqp.connect(uri).then(function(conn) {
conn.createChannel().then(function(ch) {
channel = ch;
ch.assertQueue(reqQueue, {durable: false, autoDelete: true});
ch.assertQueue(resQueue, {durable: false, autoDelete: true});
ch.consume(resQueue, function(msg) {
content = JSON.parse(msg.content.toString());
if (record = messages[content.id]) {
delete messages[content.id];
if (record.method == 'encode')
handleEncodeResponse(content, record.response);
else if (record.method == 'knn')
handleKnnResponse(content, record.response);
}
}, {noAck: true});
});
});
app.post('/encode', function(req, res) {
id = uuid();
messages[id] = {method: 'encode', response: res};
body = JSON.stringify({
method: 'encode',
params: {text: req.body.text},
id: id
});
channel.sendToQueue(reqQueue, Buffer.from(body));
});
app.post('/knn', function(req, res) {
id = uuid();
messages[id] = {method: 'knn', response: res};
body = JSON.stringify({
method: 'knn',
params: {query: req.body.query, k: 3, id: req.body.id},
id: id
});
channel.sendToQueue(reqQueue, Buffer.from(body));
});
function handleEncodeResponse(content, res) {
res.send(JSON.stringify({id: content.result.id}));
}
function handleKnnResponse(content, res) {
res.send(JSON.stringify(content.result));
}
var server = app.listen(process.env.PORT || 8080);