#!/bin/bash



cleanxss(){ sed 's/&/\&amp;/g; s/</\&lt;/g; s/>/\&gt;/g; s/"/\&quot;/g; s/'"'"'/\&#39;/g' | tr "\n" " " | sed -e '$a\'; }

TEMPIDC=/tmp/$RANDOM

function visit(){
    regex='(https?|ftp|file)://[-A-Za-z0-9\+&@#/%?=~_|!:,.;]*[-A-Za-z0-9\+&@#/%=~_|]'
string=$1
if [[ $string =~ $regex && $string != *"<"* && $string != *">"* ]]
then 
    
    echo visiting $1
    sleep 1
    # get URLs  

    CRAWLED="./content/"`echo $1 | shasum | head -c 5`
    echo $CRAWLED                                                                                                                                          
    curl $1 -m 1 -L -A "tser/1.0" > $TEMPIDC
 
    cat $TEMPIDC | grep href=\" | grep "https://" | grep -o "https:\/\/[^\"]*" | awk '/html$/ || /php$/ || /txt$/ || /\/$/ { print $0 }' >> $2
    cat $TEMPIDC | grep href=\" | grep "https://" | grep -o "https:\/\/[^\"]*" | awk '!/html$/ && !/php$/ && !/txt$/ && !/\/$/ { print $0"/" }' >> $2


    cat $TEMPIDC | awk -v IGNORECASE=1 -v RS='</title' 'RT{gsub(/.*<title[^>]*>/,"");print;exit}' | cleanxss > $CRAWLED
    echo $1 | cleanxss >> $CRAWLED
    cat $TEMPIDC | awk -v IGNORECASE=1 -v RS='</p' 'RT{gsub(/.*<p[^>]*>/,"");print}' | cleanxss >> $CRAWLED
else
echo "link $1 is invalid"
fi
}

if [ ! -z $1 ];then

SITE=$1 



visit $SITE urls.txt

fi

URLLIST=`cat urls.txt|sort|uniq`

rm urls.txt

for fn in $URLLIST; do
echo "found URL $fn"
visit $fn urls.txt
done

mv urls.txt urls.txt.bak
cat urls.txt.bak | sort | uniq -w 20 > urls.txt
rm urls.txt.bak

find ./content/ -type 'f' -size -100c -delete
find ./content/ -type 'f' -size +15k -delete



grep -lrIiZ "404 not found" ./content/ | xargs -0 rm --
grep -lrIiZ "403 forbidden" ./content/ | xargs -0 rm --