requestHandlers.js

var fs = require('fs');
var querystring = require("querystring");
var formidable = require("formidable");


function start(response) {
    console.log("Request handler 'start' was called");

    var body = fs.readFileSync('index.html').toString();


    response.writeHead(200, {"Content-Type": "text/html"});
    response.write(body);
    response.end();
}   


function upload(response, request) {
    console.log("Request handler 'upload' was called.");   

    var form = new formidable.IncomingForm();
    console.log("about to parse");
    form.parse(request, function(error, fields, files) {
        console.log("parsing done");
// Possible error on Windows systems: 
// tried to rename to an existing file
        fs.rename(files.upload.path, "/tmp/test.png", function(error) {
            if (error){
                fs.unlink("/tmp/test.png");
                fs.rename(files.upload.path, "/tmp/test.png");
            }
        });
        response.writeHead(200, {"Content-Type": "text/html"});
        response.write("received image:<br/>")
        response.write("<img src='/show' />");
        response.end();
    });
}


function show(response) {
    console.log("Request handler 'show' was called.");
    fs.readFile("/tmp/test.png", "binary", function(error, file) {
        if (error) {
            response.writeHead(500, {"Content-Type": "text/plain"});
            response.write(error + "\n");
            response.end();
        } else {
            response.writeHead(500, {"Content-Type": "image/png"});
            response.write(file, "binary");
            response.end();            
        }
    });
}

exports.start = start;
exports.upload = upload;
exports.show = show;