I know, this is something old. There are many questions regarding to this. But none of them didn't guide me or didn't gave me the actual concept. My case is:
if something
render something
else
render somethingAnother
Why is this logic generates this error enter image description here
After 1st execution, I'm not able to continue this process (I could continue for a while, but after some time error will come), by pressing back button of browser and then returning back to the home page. Everytime I should restart my server using node command. Why headers won't reset if I press back button of browser, how to do some header reset or something which will correct my logic.
const cv = require('opencv4nodejs');
var async = require('async');
var OrderID;
var OrderNo;
var compare = 0;
var CompanyName;
var notSimilar = 0;
const download = require('image-downloader')
const distanceThreshold = 30;
var url;
var FolderPath;
var isSimilar = 0;
var j = 0;
var image1;
var dbPath;
var filterCount = 0;
var image2;
var dbImgCount = 0;
var express = require('express');
var request = require('request');
var app = express();
app.set('view engine', 'pug')
var multer = require('multer');
var storage = multer.diskStorage({
destination: function (req, file, callback) {
callback(null, './');
},
filename: function (req, file, callback) {
callback(null, file.fieldname + '-' + Date.now());
}
});
var upload = multer({ storage : storage}).single('userPhoto');
const sql = require("mssql");
var config = {
user: '***',
password: '****',
server: '192.168.5.100\\SQLEXPRESS',
database: 'Test_MatdesignDB1',
connectionTimeout: 300000,
requestTimeout: 300000,
pool: {
idleTimeoutMillis: 300000,
max: 100
}
};
sql.connect(config).then(pool => {
return pool.request()
.query('select count(*) from OrderImageUpload; select FolderPath from OrderImageUpload;')
}).then(result => {
var a = JSON.stringify(result.recordset[0]);
dbImgCount = a.slice(4,6);
FolderPath = result.recordsets[1];
sql.close();
}).catch(err => {
console.log(err);
sql.close();
})
app.get('/',function(req,res){
res.sendFile(__dirname + "/index.html");
});
app.post('/api/photo',function(req,res){
compare = 1;
upload(req,res,function(err) {
if(err) {
console.log(err);
res.send("File uploading error");
}
else{
// console.log("Success");
image1 = req.file.filename;
var matchFeatures = ({ url, img1, img2, detector, matchFunc }) => {
// detect keypoints
const keyPoints1 = detector.detect(img1);
const keyPoints2 = detector.detect(img2);
// compute feature descriptors
const descriptors1 = detector.compute(img1, keyPoints1);
const descriptors2 = detector.compute(img2, keyPoints2);
// match the feature descriptors
const matches = matchFunc(descriptors1, descriptors2);
// only keep good matches
const bestN = 40;
const bestMatches = matches.sort(
(match1, match2) => (match1.distance - match2.distance)
).slice(0, bestN);
//console.log(bestMatches);
for(var i=0; i<bestN; i++){
if((bestMatches[i].distance) <= (distanceThreshold)){
filterCount++;
}
}
if(filterCount >= (bestN/4))
isSimilar = 1;
if(isSimilar){
notSimilar = 0;
filterCount = 0;
isSimilar = 0;
console.log("Similar images\n");
dbPath = url;
sql.close();
(async function() {
try {
let pool = await sql.connect(config)
let result1 = await pool.request()
.query("select OrderID from Test_MatdesignDB1.dbo.OrderImageUpload where FolderPath = '"+dbPath+"';")
OrderID = result1.recordset[0].OrderID;
let result2 = await pool.request()
.query('select OrderNo , CompanyName from Test_MatdesignDB1.dbo.[Order] where OrderID = '+OrderID);
OrderNo = result2.recordset[0].OrderNo;
CompanyName = result2.recordset[0].CompanyName;
res.render('similar', { title: 'Similar', CompanyName: CompanyName, OrderID: OrderID, OrderNo: OrderNo, img_path_var : dbPath }) //Render number 1 in 'if' case
} catch (err) {
console.log(err);
sql.close();
}
sql.close();
})()
sql.on('error', err => {
console.log(err);
})
}
else{
isSimilar = 0;
filterCount = 0;
notSimilar++;
if(notSimilar >= (dbImgCount ))
{
notSimilar = 0;
res.render('notSimilar', { title: 'Not Similar', message: 'No Similar Images' }) //Render number 2 in 'else' case
}
console.log("Not similar\n");
}
return cv.drawMatches(
img1,
img2,
keyPoints1,
keyPoints2,
bestMatches
);
};
for (j=0; j<dbImgCount; j++) {
(function(j) {
async.waterfall([
async function downloadIMG(done) {
try {
var options = {
url: FolderPath[j].FolderPath,
dest: '/home/ubuntu/imgCompare/DBimages/'
}
const { filename, image } = await download.image(options);
return [filename, options.url];
} catch (e) {
console.error(e)
}
},
async function featureMatching([a, MatchURL], done){
const img1 = cv.imread(image1);
url = MatchURL;;
const img = a.slice(33);
const img2 = cv.imread('./DBimages/'+img);
const orbMatchesImg = matchFeatures({
url,
img1,
img2,
detector: new cv.ORBDetector(),
matchFunc: cv.matchBruteForceHamming
});
done(null);
}
],
function (err) {});
})(j);
}
}
});
});
app.listen(5000,function(){
console.log("Working on port 5000");
});
