Java

Fetch Web Pages from Local Cache

See more HTTP Examples

Demonstrates how to keep a local cache to avoid re-fetching web pages. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Http;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example assumes the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Http http = new Http();

        // Define a cache directory and set the number of levels based on the anticipated size of the cache.
        http.addCacheRoot("c:/example/httpCache/");

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

        // Tell the http object to fetch from the cache if possible.
        http.setFetchFromCache(true);

        // Also tell the http object to update the cache with newly fetched pages.
        http.setUpdateCache(true);

        // This HTTP GET should result in a cache file getting created.
        String html;
        try {
            html = http.quickGetStr("https://www.google.com/");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // The 1st GET was not from cache:
        System.out.println("Fetched from cache: " + http.getLastFromCache());

        // Fetching again will cause the page to be delivered from our local cache.
        try {
            html = http.quickGetStr("https://www.google.com/");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // The 2nd GET is from cache:
        System.out.println("Fetched from cache: " + http.getLastFromCache());
    }
}