uploaded.to wget download

#!/bin/sh
# Copyright Wolf Posdorfer, 2016
# Derived from 2015 Jan-Philip Gehrcke, http://gehrcke.de
# See http://gehrcke.de/2015/03/uploaded-to-download-with-wget/ for original work


# usage:
# 1. enable "Direct downloads" in Uploaded
# 2. save script as download.sh
# 3. execute: "sh download.sh http://ul.to/XYZ"


USERNAME="username"
PASSWORD="password"

if [ "$#" -ne 1 ]; then
    echo "Missing argument: URL." >&2
    exit 1
fi

TMPDIR="$(mktemp -d)"
# Install trap that removes the temporary directory recursively
# upon exit (except for when this program retrieves SIGKILL).
trap 'rm -rf "$TMPDIR"' EXIT


LOGINRESPFILE="${TMPDIR}/login.response"
LOGINOUTPUTFILE="${TMPDIR}/login.outerr"
COOKIESFILE="${TMPDIR}/login.cookies"
LOGINURL="http://uploaded.net/io/login"


echo "Temporary directory: ${TMPDIR}"
echo "Log in via POST request to ${LOGINURL}, save cookies."
wget --save-cookies=${COOKIESFILE} --server-response --output-document ${LOGINRESPFILE} --post-data="id=${USERNAME}&pw=${PASSWORD}" ${LOGINURL} > ${LOGINOUTPUTFILE} 2>&1

# Status code is 200 even if login failed.
# Uploaded sends a '{"err":"User and password do not match!"}'-like response
# body in case of error.

echo "Verify that login response is empty."
# Response is more than 0 bytes in case of login error.
if [ -s "${LOGINRESPFILE}" ]; then
    echo "Login response larger than 0 bytes. Print response and exit." >&2
    cat "${LOGINRESPFILE}"
    exit 1
fi

# Zero response size does not necessarily imply successful login.
# Wget adds three commented lines to the cookies file by default, so
# set cookies should result in more than three lines in this file.
COOKIESFILELINES="$(cat ${COOKIESFILE} | wc -l)"
echo "${COOKIESFILELINES} lines in cookies file found."
if [ "${COOKIESFILELINES}" -lt "4" ]; then
    echo "Expected >3 lines in cookies file. Exit.". >&2
    exit 1
fi



# Assume that login worked.
echo "GET ${1} (use auth cookie), store response."

wget --load-cookies=${COOKIESFILE} --content-disposition ${1}