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bash wget - check if file exists at url before downloading
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#!/bin/bash | |
# simple function to check http response code before downloading a remote file | |
# example usage: | |
# if `validate_url $url >/dev/null`; then dosomething; else echo "does not exist"; fi | |
function validate_url () { | |
if [[ `curl -s --head "$1" | head -n 1 | grep "HTTP/[1-3].[0-9] [23].."` ]] | |
then | |
# 0 = true | |
return 0 | |
else | |
# 1 = false | |
return 1 | |
fi | |
} | |
start=2016-01-01 | |
end=2016-12-31 | |
while [[ $start < $end ]] | |
do | |
dt=$(date -d "$start + 1 day" +"%Y-%m-%d"); | |
start=$(date -d "$start + 1 day" +"%Y-%m-%d"); | |
url=http://download.capital.it/podcast/whatever/2016/whatever-$dt.mp3; | |
if validate_url $url; then wget $url -O ./mp3/whatever_${dt}.mp3; fi | |
done | |
# http://download.capital.it/podcast/whatever/2016/whatever-2016-10-19.mp3 | |
# http://cdn.flv.kataweb.it/deejay/audio/il_volo_del_mattino/$dt.mp3; |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/bin/bash | |
# simple function to check http response code before downloading a remote file | |
# example usage: | |
# if `validate_url $url >/dev/null`; then dosomething; else echo "does not exist"; fi | |
function validate_url(){ | |
if [[ `wget -S --spider $1 2>&1 | grep 'HTTP/1.1 200 OK'` ]]; then | |
echo "URL exist $1" >> export_`date -I`.txt | |
else | |
echo "Error detected. $1" >> export_`date -I`.txt | |
fi | |
} | |
echo "" > export_`date -I`.txt | |
for ((i = 1000000; i < 1000003; i++)); do | |
validate_url "http://creativemedia3.rai.it/podcastcdn/raitre/ulisse/Ulisse_EP_Puntate/${i}_800.mp4" | |
done |
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