rsget.pl is a powerful perl application designed to retrieve files from
download services (like RapidShare, MegaUpload and many more).
It has a long list of features implemented already and even longer TODO list.

You can find more details on http://rsget.pl/ web page.

Features:
- Perfect for screen session
- Support for many download services
- Supports multiple network interfaces
- Dead interfaces are kicked out (useful with unreliable vpn tunnels)
- Continues partially downloaded files (if download service allows it)
- Incorporates small HTTP server allowing to check the status of downloads,
  and add new links.
- Automatically updates itself from SVN.

TODO:
- Write more documentation
- When continuing partially downloaded data start few kb before the end and
  compare old with new.
- Add commands: pause downloads, allow/don't allow captcha, and more
- File group support (first step for multiuser support)
- File priorities and group priorities.
- Selectable temporary directory.
- Fix bugs in http server, and speed it up.
- Better file writing methods, to allow downloading from multiple sources.
- Backoff if captcha fails too many times; lower uri prio.
- If multi-download problem appears while checking files force check on
  another interface/ip.
- Possibility to mark uri as "cannot continue".

Planned features:
- Multiuser support (may require major changes in the code).
- XML-RPC (or similar) to allow writing GUIs.

For full list of command-line options check: rsget.pl --help. All those options
may also be set in config file ( $HOME/.rsget.pl/config ). Check 'README.config'
file for example config.
Each option requires a value, which may be specified immediately after '=' sign,
or as next argument. Underscores may be replaced with dashes.
Following command-line declarations are equivalent:
 --use_svn=update
 --use-svn=update
 --use_svn update
 --use-svn update


============================= URI list / get.list =============================

Understanding URI list syntax may be very important for people unable or not
willing to use HTTP interface. It also is crucial if writing any software
for manipulating the list.

Empty lines and lines starting with '#' are ignored. If line does not start
with '#', the sign and text after it are treated as part of the line, and not
as a comment.

Long lines may be truncated between any two words in following manners:
- Append '\' at the end of unfinished line:
	word1 word2 \
	word3 \
	word4 word5
- Start added line with '+' sign (preferred):
	word1 word2
	+ word3
	+ word4 word5

Each line specify one file to download, it is composed of following parts:

[COMMAND:] [GLOBAL_OPTS] URI1 [URI1_OPTS] [URI2 [URI2_OPTS] [URI3 ...]]

When introducing new source URI1 is the only part required. URIs must valid
identifiers, as seen in location bar in your web browser; i.e. they may not
contain spaces, replace them with '%20'.

COMMAND may be one of: GET, DONE, STOP or ADD. Note the upper case, and colon
sign (:) after command. If none specified GET is assumed. Their meanings are:
- GET: download the file, or continue partially downloaded one
- DONE: file download completed, don't try to download
- STOP: file download aborted or never started, don't try to download
- ADD: try to find other uris on the list with the same name and size and add
    this uri as clone, if none found add it as new source. Command possibly
    dangerous, SEE (1)

GLOBAL_OPTS are options applied to all URIs for this file. Options specified
after URI are applied only to the URI immediately proceeding them. Each option
has syntax: 'name=value', where both name and value must be URI-encoded, in most
cases it is enough to replace '%' sign and any white space with corresponding
'%XX' code. There are many options saved by rsget.pl itself, but only a few
which should be introduced, before starting download, by the user:
- (global) dir=VALUE - directory within workdir and outdir where downloaded
    file should be placed
- (local) pass=VALUE - file password, sometimes required to download a file,
    SEE (2)

Some of automatic options (saved by rsget.pl):
- (global) fname=VALUE - exact name of file, set after starting download
- (global) fsize=VALUE - exact size of file, set after starting download
- (local) error=VALUE - reason of last failure, URI won't be considered if it
    contains error option, if all URIs for file have errors COMMAND will change
    to STOP
- (local) name, iname, aname, ainame - name of file as reported by the website
- (local) size, asize - size of file as reported by the website

rsget.pl always writes each line in the following style:
	COMMAND: [GLOBAL_OPTS]
	+ URI1 [URI1_OPTS]
	+ URI2 [URI2_OPTS]
	...

NOTE to programmers:
  rsget.pl rereads list file each time it is willing to change something,
or file's mtime has changed. For that matter you should newer write directly to
that file, unless you are appending only.
  On the other hand, rsget.pl will not make any changes to the list file if lock
file exists. There is one exception tho: if new sources are added from HTTP
interface and lock file exists it is removed and new URIs are written.
  Assuming your list_file is get.list, and lock file used is: get.list.lock,
you should:
	touch get.list.lock # this ensures consistency
	read get.list
	process
	if needs update:
	    write get.list.new
	    if exists get.list.lock:
	        rename get.list.new to get.list
	    else: # get.list has changed
	        restart from beginning
	remove get.list.lock


NOTES:
 (1) Some download services (e.g. MegaUpload) abbreviate file names on their
download pages, which may lead to incorrect clone guesses. If there is a three
part rar, first two parts will have the same size, and same abbreviated name.
ADD command will think both links specify the same file. Moreover MegaUpload
allows continuing partial downloads, so after restarting rsget.pl you may end up
with a broken file containing data chunks from both sources.

 (2) It is not user password nor rar file password. Some sites (in fact
MegaUpload is the only one) may require to introduce resource password to be
able to download a file. That password is set by the uploader, separately for
each resource, and it should be provided by the uploader along with the URIs.