Multi html download. Post: 302738157

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Top Forums Shell Programming and Scripting Multi html download. Post 302738157 by Corona688 on Friday 30th of November 2012 12:37:18 PM

11-30-2012

Registered User

Since they're in the background, they have to be saved to independent files. It'd be almost impossible to guarantee the order of the output if they weren't.

I'd try splitting the file into many chunks for wget -i to handle independently. This will allow them to be concurrent without such an overwhelming number of files.

Code:

#!/bin/sh

# Calculate how many lines among n processes, 10 default
MAXPROC=${2:-10}
# Count lines first
LINES=$(wc -l < $1 )
# Divide lines by processes
let LINES=LINES/MAXPROC

# Split file into 10 chunks xaa, xab, ...
split -l $LINES < $1

# Loop over xaa, xab, ...
for FILE in x*
do
        # Download one set of files from $FILE into $FILE.out in background
        wget -nv -i "$FILE" -O - > $FILE.out 2> $FILE.err &
done

wait    # Wait for all processes to finish

# Assemble files in order
cat x*.out
cat x*.err >&2
# Remove temporary files
rm x*

Use it like

Code:

./multiget.sh filelist 5 2> errlog > output

for 5 simultaneous downloads.

Corona688

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LEARN ABOUT DEBIAN

bup-server

bup-server(1)						      General Commands Manual						     bup-server(1)

NAME

       bup-server - the server side of the bup client-server relationship

SYNOPSIS

       bup server

DESCRIPTION

       bup server  is  the  server  side of a remote bup session.  If you use bup-split(1) or bup-save(1) with the -r option, they will ssh to the
       remote server and run bup server to receive the transmitted objects.

       There is normally no reason to run bup server yourself.

MODES

       smart  In this mode, the server checks each incoming object against the idx files in its repository.  If  any  object  already  exists,	it
	      tells  the  client  about  the  idx file it was found in, allowing the client to download that idx and avoid sending duplicate data.
	      This is bup-server's default mode.

       dumb   In this mode, the server will not check its local index before writing an object.  To avoid writing duplicate  objects,  the  server
	      will tell the client to download all of its .idx files at the start of the session.  This mode is useful on low powered server hard-
	      ware (ie router/slow NAS).

FILES

       $BUP_DIR/bup-dumb-server
	      Activate dumb server mode, as discussed above.  This file is not created by default in new repositories.

SEE ALSO

       bup-save(1), bup-split(1)

BUP

       Part of the bup(1) suite.

AUTHORS

       Avery Pennarun <apenwarr@gmail.com>.

Bup unknown-															     bup-server(1)

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