(Ruby) Fetch Web Pages from Local Cache

Demonstrates how to keep a local cache to avoid re-fetching web pages.

Note: This example requires Chilkat v9.5.0.91 or later.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

http = Chilkat::CkHttp.new()

# Define a cache directory and set the number of levels based on the anticipated size of the cache.
http.AddCacheRoot("c:/AAWorkarea/httpCache/")

# up to 256 sub-directories under the cache root will be created as needed to hold cached GET's.
http.put_NumCacheLevels(1)

# Tell the http object to fetch from the cache if possible.
http.put_FetchFromCache(true)

# Also tell the http object to update the cache with newly fetched pages.
http.put_UpdateCache(true)

# This HTTP GET should result in a cache file getting created.
html = http.quickGetStr("https://www.google.com/")
if (http.get_LastMethodSuccess() == false)
    print http.lastErrorText() + "\n";
    exit
end

# The 1st GET was not from cache:
print "Fetched from cache: " + http.get_LastFromCache().to_s() + "\n";

# Fetching again will cause the page to be delivered from our local cache.
html = http.quickGetStr("https://www.google.com/")
if (http.get_LastMethodSuccess() == false)
    print http.lastErrorText() + "\n";
    exit
end

# The 2nd GET is from cache:
print "Fetched from cache: " + http.get_LastFromCache().to_s() + "\n";