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200 lines
4.9 KiB
200 lines
4.9 KiB
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var http = require('http');
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const fs = require('fs');
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var url = require('url');
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var path = require('path');
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var StringDecoder = require('string_decoder').StringDecoder;
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var mimeTypes = {
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"html": "text/html",
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"jpeg": "image/jpeg",
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"jpg": "image/jpeg",
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"png": "image/png",
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"js": "text/javascript",
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"css": "text/css",
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"json": "text/plain"};
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function writenodes(nodes) {
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fs.writeFile('public/nodes.txt', nodes, { flag: 'w' }, (err) => {
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if (err)
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console.log(err);
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else {
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console.log("File written successfully\n");
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console.log("The written has the following contents:");
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console.log(fs.readFileSync("public/nodes.txt", "utf8"));
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}
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})};
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function writeedges(edges) {
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fs.writeFile('public/edges.txt', edges, { flag: 'w' }, (err) => {
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if (err)
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console.log(err);
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else {
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console.log("File written successfully\n");
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console.log("The written has the following contents:");
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console.log(fs.readFileSync("public/edges.txt", "utf8"));
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}
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})};
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// the following read funcitons are not asyncronous, that means they will block the process..
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// for scalability this has to be changed in future
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function readnodes() {
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var input = fs.readFileSync('public/nodes.txt', 'utf8')
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// console.log('input ooohyeah',input)
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// // var danodes = JSON.parse(input);
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//
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// const lines = input.split(/\r?\n/);
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// console.log('line numbaaa 1', lines, lines[1], lines[1].length)
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// var string = '';
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// var i;
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//
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// for (i = 0; i < (lines.length - 2); i++) {
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// string += '"data' + i.toString() + '":' + lines[i] + ' ,' ;
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// };
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// string += '"data' + lines.length.toString() + '":' + lines[lines.length - 2] ;
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// string = '{' + string + '}' ;
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// const jsonlines = JSON.parse(string)
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//
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//
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// let sortedlines = [];
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// sortedlines = [].slice.call(jsonlines).sort(function(a,b) {
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// var x = a.length;
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// var y = b.length;
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// if (x < y) {
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// return -1;
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// }
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// if (x > y) {
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// return 1;
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// }
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// return 0;
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//
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// });
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// console.log('daline1 in nodes', sortedlines)
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return input
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};
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function readedges() {
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var daedges = fs.readFileSync('public/edges.txt', 'utf8');
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// const lines = daedges.split(/\r?\n/);
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// // console.log(lines)
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// sortedlines = lines.sort(function(a,b) {
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// var x = a.length;
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// var y = b.length;
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// if (x < y) {
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// return -1;
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// }
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// if (x > y) {
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// return 1;
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// }
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// return 0;
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//
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// });
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// console.log('daline1 in edges', sortedlines[0])
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return daedges
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};
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http.createServer((request, response)=>{
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var pathname = url.parse(request.url).pathname;
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var filename;
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if(pathname === "/"){
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filename = "permAppv3.html";
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}
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else{
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filename = path.join(process.cwd(), pathname);
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}
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try{
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fs.accessSync(filename, fs.F_OK);
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var fileStream = fs.createReadStream(filename);
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var mimeType = mimeTypes[path.extname(filename).split(".")[1]];
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response.writeHead(200, {'Content-Type':mimeType});
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fileStream.pipe(response);
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if (mimeType === "text/plain"){
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// Get the payload,if any
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var decoder = new StringDecoder('utf-8');
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var buffer = '';
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request.on('data', function(data) {
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buffer += decoder.write(data);
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});
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var theanswer = '';
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request.on('end', function() {
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buffer += decoder.end();
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if (buffer[3] === 'i'){
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writenodes(buffer);
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theanswer = 'your changes were taken into the\n\nM A T R I X'
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}
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if (buffer[3] === 'f'){
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writeedges(buffer);
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theanswer = 'your changes were taken into the\n\nM A T R I X'
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}
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console.log(buffer[3])
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if (buffer[3] === 'e'){
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edges = readedges();
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nodes = readnodes();
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console.log('oleola',nodes)
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theanswer = '{' + '\"edges\":' + edges + ',' +'\"nodes\":' + nodes + '}'
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}
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// Send the response
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response.end(theanswer);
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// Log the request/response
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console.log('Payload received: ',buffer);
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});
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}
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}
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catch(e) {
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console.log('File not exists: ' + filename);
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response.writeHead(404, {'Content-Type': 'text/plain'});
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response.write('404 Not Found\n');
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response.end();
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return;
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}
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return;
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}
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).listen(5000);
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/*
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const axios = require("axios");
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async function getCatFacts() {
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const response = await axios ({
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url: "http://localhost:5000",
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method: "GET"
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})
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console.log(response.data)
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}
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getCatFacts()
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*/
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