How to store files in server in pure Node.js? - node.js

Question

I'm trying to write to disk a file uploaded POST inside a form with the attribute enctype="multipart/form-data", and i get the data in server and managed to sort it (get contents inside file and filename), but when i write in disk, the file is not readable. These images can illustrate my situatuion. Image1 shows how i'm getting data amd image2 shows how it is displayed. I don't know what's wrong.
I've trid encoding as base64, binary, and no encoding sending it straight as it comes from form, but no success.
Image 1 http://es.tinypic.com/view.php?pic=sou610&s=9#.XRuig-tKiUk
Image 2 http://es.tinypic.com/view.php?pic=11jag49&s=9#.XRujROtKiUk
The file gets stored in server, but it is not readable. I hope i could manage to get the file in server just as it is uploaded.
if(request_param.method == "POST")
{
var qs = require('querystring');
var body = '';
request_param.on('data', function(data)
{
body += data; //gets incoming data on buffer
});
request_param.on('end', function()
{
var util = require('util');
var postvars_array = qs.parse(body);
var boundary = body.substring(0, 40); //gets the boundary
var line_separator = "\r\n";
var array_post_fields = body.split(boundary);
var array_post_field;
var field_header_array;
var file_content;
var file_name;
var file_name_arr;
var file_ext;
var file_ext_arr;
for(f = 1; f < array_post_fields.length; f++) //parses the string from multipart form
{
array_post_field = array_post_fields[f].split(line_separator);
field_header_array = array_post_field[1].split(";");
if(field_header_array.length > 2)
{
file_name = field_header_array[2]; //gets filename
file_name_arr = file_name.split("=");
file_name = file_name_arr[1];
file_name = file_name.replace('"', '');
file_name = file_name.replace('"', '');
file_content = array_post_field[4]; //gets file contents
}
}
cont += '<br/><br/>';
cont += '<br/><br/>';
cont += file_name + '<br/><br/>' + file_content; //prints file contents, lots of diamonds (question signs)
file_ext_arr = file_name.split(".");
file_ext = file_ext_arr[file_ext_arr.length - 1];
if(file_name != "")
{
const fs = require('fs');
fs.writeFile("./shared/"+file_formats[file_ext]+"/"+file_name, file_content, function(err) //writes on disk (file gets saved but its unreadable)
{
if(err)
return console.log(err);
var fs = require('fs');
fs.readFile("./media/text/template.html", 'utf8', function(err, contents)
{
if(err)
console.log(err);
cont = contents.replace("<hydra-html-content>", cont);
cont = cont.replace("<hydra-module-name>", "Archivos");
cont = cont.replace("<hydra-title-page>", ".:Hydra / Archivos:.");
response_param.writeHead(200, {'Content-Type': 'text/html; charset=utf-8'});
response_param.write(cont);
response_param.end();
});
});
}
else
{
var fs = require('fs');
fs.readFile("./media/text/template.html", 'utf8', function(err, contents)
{
if(err)
console.log(err);
cont = contents.replace("<hydra-html-content>", cont);
cont = cont.replace("<hydra-module-name>", "Archivos");
cont = cont.replace("<hydra-title-page>", ".:Hydra / Archivos:.");
response_param.writeHead(200, {'Content-Type': 'text/html; charset=utf-8'});
response_param.write(cont);
response_param.end();
});
}
});
}