A content delivery network or content distribution network (CDN) is a system of computers containing copies of data, placed at various points in a network so as to maximize bandwidth for access to the data from clients throughout the network. Please note that the following script will only work with bitgravity CDN. You need to get API access keys using bitgravity portal.
#!/bin/bash # A simple shell script to purge Bitgravity cdn cache using API and curl # command line. Tested on RHEL 6.x, Debian 6.x, and Ubuntu Linux # ---------------------------------------------------------------------------- # Written by Vivek Gite <http://www.cyberciti.biz/> # (c) 2012 nixCraft under GNU GPL v2.0+ # ---------------------------------------------------------------------------- # Last updated: 22/May/2012 # ---------------------------------------------------------------------------- ######*** SET ME FIRST ***##### # api keys # akid="you@example.com_or_YOUR-API-USERNAME" akpass="YOUR-API-PASSWORD" # 1 disable it, 0 enable it - show debug info? _debug=1 # 1 disable it, 0 enable it - only show success / fail message? _quite=0 # either curl or wget _purge="/usr/bin/curl -I" ## CDN domain ## origin="$1" ## file ## file="$2" myurl="${origin}${file}" [ $# -eq 0 ] && { echo "Usage $0: cdn.example.net /path/to/file.js"; exit 1 ; } ## Calculate md5 ## md5="${akpass}/service/?api=proxycache&method=purge&object=${myurl}&accessKeyId=${akid}" hash="$(echo -n "$md5" | md5sum )" ## Build final url for $_curl ## url="http://wsa-api.bitgravity.com/service/?api=proxycache&method=purge&object=${myurl}&accessKeyId=${akid}&h=${hash}" ## Show debug info ? ## [ $_debug -eq 0 ] && { ### debug ### echo echo "************** [ DEBUG ] ***********************" echo "MD5 url: $md5" echo "MD5 hash: $hash" echo "$url" echo "**************************************************" echo } ## Purge it ## [ $_quite -eq 0 ] && $_purge -I "$url" || { $_purge -I "$url" &>/dev/null && echo "Sucess with HTTP/200" || echo "Failed."; }
How do I access this script?
Simply run it as follows to purge a cdn url called http://files.cyberciti.biz/static/css/layout.css:
$ ./script files.cyberciti.biz /static/css/layout.css
Sample outputs:
HTTP/1.1 200 OK Date: Tue, 22 May 2012 10:07:25 GMT Server: Apache Set-Cookie: PHPSESSID=xxxxxxxxxxxxxxxxx; path=/ Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache Set-Cookie: user_id=you%40example.com; path=/; domain=.wsa-api.bitgravity.com Set-Cookie: ahash=yyyyyyyyyyyyyyyyyyyyy; path=/; domain=.wsa-api.bitgravity.com X-Served-By: util10.sjc1.bitgravity.com Connection: close Content-Type: text/plain
How do I purge lage number of urls?
Create a text file called urls.txt with urls as follows one per line:
files.cyberciti.biz /path/to/js/1.js files.cyberciti.biz /path/to/js/2.js files.cyberciti.biz /path/to/js/3.js files.cyberciti.biz /static/css/foo.jpg cdn.cyberciti.biz /dyn/bar.html video.cyberciti.biz /path/to/video/1 video.cyberciti.biz /path/to/video/1.flv
Run the script as follows:
#!/bin/bash # bulk_purge.sh # Written by Vivek Gite <http://www.cyberciti.biz/> # (c) 2012 nixCraft under GNU GPL v2.0+ # ---------------------------------------------------- _purge="/path/to/purge_script.sh" _urls="/path/to/urls.txt" while IFS= read -r domain file do $_purge "$domain" "$file" done < "${_urls}"
Run it as follows:
$ ./bulk_purge.sh
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