Swift

Fetch Web Pages from Local Cache

See more HTTP Examples

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

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

    let http = CkoHttp()!

    // Define a cache directory and set the number of levels based on the anticipated size of the cache.
    http.addCacheRoot(dir: "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: String? = http.quickGetStr(url: "https://www.google.com/")
    if http.lastMethodSuccess == false {
        print("\(http.lastErrorText!)")
        return
    }

    // The 1st GET was not from cache:
    print("Fetched from cache: \(http.lastFromCache)")

    // Fetching again will cause the page to be delivered from our local cache.
    html = http.quickGetStr(url: "https://www.google.com/")
    if http.lastMethodSuccess == false {
        print("\(http.lastErrorText!)")
        return
    }

    // The 2nd GET is from cache:
    print("Fetched from cache: \(http.lastFromCache)")

}