JavaScript

Fetch Web Pages from Local Cache

See more HTTP Examples

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

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

var http = new CkHttp();

// 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.NumCacheLevels = 1;

// Tell the http object to fetch from the cache if possible.
http.FetchFromCache = true;

// Also tell the http object to update the cache with newly fetched pages.
http.UpdateCache = true;

// This HTTP GET should result in a cache file getting created.
var html = http.QuickGetStr("https://www.google.com/");
if (http.LastMethodSuccess == false) {
    console.log(http.LastErrorText);
    return;
}

// The 1st GET was not from cache:
console.log("Fetched from cache: " + http.LastFromCache);

// Fetching again will cause the page to be delivered from our local cache.
html = http.QuickGetStr("https://www.google.com/");
if (http.LastMethodSuccess == false) {
    console.log(http.LastErrorText);
    return;
}

// The 2nd GET is from cache:
console.log("Fetched from cache: " + http.LastFromCache);