Added fetchers concept: seperate scripts to fetch the feeds

Fetchers claim to be a certain client. They try to send the same
headers as the original client. That's better than a simple curl request
with a fake user agent, because curl doesn't send the other headers like
the original client and therefore its traffic stands out.

fetchers/chrome

@@ -0,0 +1,10 @@
+#!/bin/sh
+#Tries more or less to look like Chrome
+if [ $# -ne 2 ] ; then
+echo "usage: $0 url output" 1>&2
+exit 1
+fi
+#better randomize
+useragent=$(shuf -n 1 $RANDRSS_ROOT/fetchers/chrome_agents)
+
+curl "$1" -H 'Accept-Encoding: gzip, deflate, br' -H 'Accept-Language: en-US,en;q=0.8' -H 'Upgrade-Insecure-Requests: 1' -H "User-Agent: $useragent" -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8'  -H 'Connection: keep-alive'  -H 'Cache-Control: max-age=0' --compressed > $2

fetchers/chrome_agents

@@ -0,0 +1 @@
+User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.78 Safari/537.36

fetchers/firefox

@@ -0,0 +1,11 @@
+#!/bin/sh
+set -x
+#Tries more or less to look like Firefox
+if [ $# -ne 2 ] ; then
+echo "usage: $0 url output" 1>&2
+exit 1
+fi
+#better randomize
+useragent=$(shuf -n 1 $RANDRSS_ROOT/fetchers/firefox_agents)
+
+curl "$1" -H "User-Agent: $useragent" -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' -H 'Accept-Language: en-US,en;q=0.5' -H 'Accept-Encoding: gzip, deflate, br' --compressed -H 'Connection: keep-alive' -H 'Upgrade-Insecure-Requests: 1' > $2

fetchers/firefox_agents

@@ -0,0 +1,2 @@
+Mozilla/5.0 (X11; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0
+Mozilla/5.0 (Windows NT 10.0; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0

fetcherslist

@@ -0,0 +1,2 @@
+fetchers/firefox
+fetchers/chrome

randrss

@@ -1,21 +1,28 @@
 #!/bin/bash
 set -x 
 set -e
+#TODO: make this more robust
+export RANDRSS_ROOT=$(pwd)
 random_default=$( shuf -n 1 -i720-753)
 DEFAULT_PER_ITEM="1-$random_default"
 
 echo "Current default sleep seconds range: $DEFAULT_PER_ITEM"
 if [ $# -lt 1 ] ; then
-echo "Usage: $0 inputfile [user agents] [syncnow]"
+echo "Usage: $0 inputfile fetchersfile [syncnow]"
 exit
 fi
 inputfile="$1"
-useragentsfile="$2"
+fetchersfile="$2"
 if [ ! -f "$inputfile" ] ; then
 echo "inputfile does not exist or is not readable" 1>&2
 exit 1
 fi
 
+if [ ! -f "$fetchersfile"  ] ; then
+echo "fetchersfile does not exist or is not readable" 1>&2
+exit 1
+fi
+
 syncnow=0
 if [ "$3" = "syncnow" ] ; then
 syncnow=1
@@ -31,13 +38,11 @@ while true ; do
 		else
 			sleepfor=$( shuf -i "$DEFAULT_PER_ITEM" -n 1)
 		fi
-		useragent=""
-		if [ -n "$useragentsfile" ] ; then
-			useragent=$( shuf -n 1 "$useragentsfile" )
-		fi
-		echo "Sleeping for $sleepfor seconds for $url"
-		[ $syncnow -eq 1 ] || sleep "$sleepfor"
-		torsocks wget "$url" -U "$useragent" -O "$output" || echo "Failed to fetch $url"
+		fetcher=$( shuf -n 1 "$fetchersfile" )
+		
+		[ $syncnow -eq 1 ] || ( echo "Sleeping for $sleepfor seconds for $url, chosen fetcher $fetcher" && sleep "$sleepfor" )
+		echo "Fetching $url with $fetcher"
+		torsocks ./$fetcher "$url" "$output" || echo "Failed to fetch $url"
 	done
 	[ $syncnow -eq 1 ] && exit
 done