Difference between revisions of "Wget"

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(→‎Download multiple files)
(→‎Automating/scripting download process)
 
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# invoke wget-list without arguments
 
# invoke wget-list without arguments
−
while [ $(find .wget-list -size +0) ]
+
while [ $(find .wget-list -size +0) ]; do
−
do
+
 
   url=$(head -n1 .wget-list)
 
   url=$(head -n1 .wget-list)
−
  wget -c ${url}
+
  wget -c ${url}
−
  sed -si 1d .wget-list
+
  sed -si 1d .wget-list
−
done
+
done
 
</pre>
 
</pre>
  
 
<pre>
 
<pre>
−
#/bin/sh
+
#!/bin/sh
 
# wget-all: process .wget-list in every subdirectory
 
# wget-all: process .wget-list in every subdirectory
 
# invoke wget-all without arguments
 
# invoke wget-all without arguments
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# invoking: wget-dirs <path-to-directory> ...
 
# invoking: wget-dirs <path-to-directory> ...
  
−
for dir in $*
+
for dir in $*; do
−
  do
+
  pushd ${dir}
−
      pushd ${dir}
+
  wget-all
−
      wget-all
+
  popd
−
      popd
+
done
−
  done
+
 
wget-all
 
wget-all
 
</pre>
 
</pre>

Latest revision as of 07:18, 13 September 2021

wget — The non-interactive network downloader.

Usage

  • Simple download:
$ wget http://www.example.com/index.html
  • Download a file and store it locally using a different file name:
$ wget -O example.html http://www.example.com/index.html
  • Background download:
$ wget -b https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.0.4.tar.gz
$ tail -f wget-log  # <- monitor download

The above command is useful when you initiate a download via a remote machine. This will start downloading in background, so that you can disconnect the terminal once the command is issued.

  • Mirror an entire web site:
$ wget -m http://www.example.com
  • Mirror an entire subdirectory of a web site (with no parent option in case of backlinks):
$ wget -mk -w 20 -np http://example.com/foo/
  • Download all pages from a site and the pages the site links to (one-level deep):
$ wget -H -r --level=1 -k -p http://www.example.com
  • Resume large file download:
$ wget -c --output-document=MIT8.01F99-L01.mp4 "https://www.youtube.com/watch?v=X9c0MRooBzQ"
  • Schedule hourly downloads of a file
$ wget --output-document=traffic_$(date +\%Y\%m\%d\%H).gif "http://sm3.sitemeter.com/YOUR_CODE"
  • Automatically download music (by Jeff Veen):
$ wget -r -l1 -H -t1 -nd -N -np -A.mp3 -erobots=off -i mp3_sites.txt

where mp3_sites.txt lists your favourite (legal) download sites. 

#~OR~
$ wget -r --level=1 -H --timeout=1 -nd -N -np --accept=mp3 -e robots=off -i musicblogs.txt
  • Download all mp3's listed in an html page (source):
$ wget -r -l1 -H -t1 -nd -N -np -A.mp3 -erobots=off [url of website]
#-r: recursive
#-l1: depth = 1
#-H: span hosts
#-t1: try once
#-nd: no heirarchy of directories
#-N: turn on time-stamping
#-np: do not ascend to parents
#-A.mp3: accept only mp3 files
#-erobots=off: ignore robots.txt
  • Crawl a website and generate a log file of any broken links:
$ wget --spider -o wget.log -e robots=off --wait 1 -r -p http://www.example.com/

$ wget --user-agent="Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0" https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.0.4.tar.gz
  • Limit download speed/rate:
$ wget --limit-rate=300k https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.0.4.tar.gz
  • Get headers:
$ wget -SO /dev/null xtof.ch
--2021-09-13 00:14:04--  http://xtof.ch/
Resolving xtof.ch (xtof.ch)... 1.2.3.4
Connecting to xtof.ch (xtof.ch)|1.2.3.4|:80... connected.
HTTP request sent, awaiting response... 
  HTTP/1.1 200 OK
  Date: Mon, 13 Sep 2021 07:14:04 GMT
  Server: Apache/2.4.37 (centos)
  Last-Modified: Tue, 28 Jul 2020 23:13:16 GMT
  ETag: "d2-5ab88958ae676"
  Accept-Ranges: bytes
  Content-Length: 210
  Keep-Alive: timeout=5, max=100
  Connection: Keep-Alive
  Content-Type: text/html; charset=UTF-8
Length: 210 [text/html]
Saving to: ‘/dev/null’

Download multiple files

  • Create variable that holds all URLs and then using "BASH for loop" to download all files:
$ URLS="http://www.example.com/foo.tar.gz ftp://ftp.example.org/pub/bar.tar.gz"
  • Use for loop as follows:
$ for u in $URLS; do wget $u; done
  • You can also put a list of the URLs in a file and download using the -i option:
$ wget -i download.txt

Automating/scripting download process

#!/bin/sh
# wget-list: manage the list of downloaded files

# invoke wget-list without arguments
while [ $(find .wget-list -size +0) ]; do
  url=$(head -n1 .wget-list)
  wget -c ${url}
  sed -si 1d .wget-list
done

#!/bin/sh
# wget-all: process .wget-list in every subdirectory
# invoke wget-all without arguments

find -name .wget-list -execdir wget-list ';'

#!/bin/sh
# wget-dirs: run wget-all in specified directories
# invoking: wget-dirs <path-to-directory> ...

for dir in $*; do
  pushd ${dir}
  wget-all
  popd
done
wget-all

See also

External links

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