Xojo Plugin

Fetch Web Pages from Local Cache

See more HTTP Examples

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

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

Dim http As New Chilkat.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.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.
Dim html As String
html = http.QuickGetStr("https://www.google.com/")
If (http.LastMethodSuccess = False) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

// The 1st GET was not from cache:
System.DebugLog("Fetched from cache: " + Str(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) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

// The 2nd GET is from cache:
System.DebugLog("Fetched from cache: " + Str(http.LastFromCache))