WGET CGI Post

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Post upload using wget

I like to use wget in shell scripts to upload files to remote servers over http. I use this when it isn't convenient to use scp.

This is not secure if you don't pay attention.

This requires a tiny Python script on the client side and a little PHP on the server side. The Python script is used to encode the file to be uploaded so that wget can send it as a POST request. It's a very simple script, so you can easily replace it with the language of your choice (Perl or maybe even sh).

Step 1. On the client side create a Python script called "postencode.py":

#!/usr/bin/env python
import sys, urllib, base64
input_filename = sys.argv[1]
postwad_filename = input_filename + ".post"
datawad = base64.encodestring(file(input_filename, "rb").read())
postwad = urllib.urlencode({"filedata":datawad, "filename":input_filename})
file(postwad_filename, "wb").write(postwad)
print postwad_filename

Step 2. On the server side create a PHP create a script called "upload.php":

<html><head><title>Post Upload Tool</title><body>
<?php
    $filename = $_POST['filename'];
    $filedata = base64_decode($_POST['filedata']);
    echo "<h1>$filename</h1>";
    $fout = fopen($filename,"wb");
    fwrite($fout, $filedata);
    fclose($fout);
?>
</body></html>

Step 3. Use wget to post a file to the server (note the backticks):

wget --post-file=`./postencode.py FILENAME` http://www.example.com/upload.php

Other languages for the client side

If you choose not to use Python for the postencode script then here are references for other languages.

In Perl use:

   use URI::Escape;
   uri_escape(...);

In PHP use:

   urlencode(...);