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app.js
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app.js
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const express = require('express');
const multer = require('multer');
const ejs = require('ejs');
const path = require('path');
const app = express();
const watson = require('watson-developer-cloud');
// Set Storage Engine
const storage = multer.diskStorage({
destination: './public/uploads/',
filename: function(req, file, cb){
cb(null,file.originalname);
}
});
// Init Upload
const upload = multer({
storage: storage,
limits:{fileSize: 1000000},
fileFilter: function(req, file, cb){
checkFileType(file, cb);
}
}).single('myImage');
// Check File Type
function checkFileType(file, cb){
// Allowed ext
const filetypes = /jpeg|jpg|png|gif|bmp/;
// Check ext
const extname = filetypes.test(path.extname(file.originalname).toLowerCase());
// Check mime
const mimetype = filetypes.test(file.mimetype);
if(mimetype && extname){
return cb(null,true);
} else {
cb('Error: Images Only!');
}
}
// EJS
app.set('view engine', 'ejs');
// Public Folder
app.use(express.static('./public'));
app.get('/', (req, res) => res.render('index'));
app.post('/upload', (req, res) => {
upload(req, res, (err) => {
if(err){
res.render('index', {
msg: err
});
} else {
if(req.file == undefined){
res.render('index', {
msg: 'Error: No File Selected!'
});
} else { // Say what it is
var fs = require('fs');
var visual_recognition = watson.visual_recognition({
api_key: '8d7aced8efa9ce11cca985d203dce5989cc20148',
version: 'v3',
version_date: '2016-05-20'
});
let filepath = `./public/uploads/${req.file.filename}`;
var params = {
images_file: fs.createReadStream(filepath)
};
visual_recognition.classify(params, function(err2, res2) {
if (err2){
console.log(err2);
}
else {
var query = res2;
var word = highest(query);
res.render('index', {
msg: `${word}`,
file: `uploads/${req.file.filename}`
// file: `uploads/${req.file.filename}`
});
// res.send(word);
}
});
}
}
});
});
const port = 80;
app.listen(port, () => console.log(`Server started on port ${port}`));
// Watson function
function highest(query){
// array of class, score, type_hierarchy
var classes = query["images"][0]['classifiers'][0]['classes'];
// make array of scores
var scores = [];
for (var i = 0; i < classes.length; i++){
scores.push(classes[i]['score'])
}
var max = -1;
var maxIndex = -1;
for (var i = 0; i < scores.length; i++){
if (scores[i] > max && numWords(classes[i]['class']) == 1){
max = scores[i];
maxIndex = i;
}
}
var maxClass = classes[maxIndex]['class'];
return maxClass;
}
function numWords(s){
return s.split(' ').length;
}