VBA getHTML as custom function - Avoid several HTML retrival

[atpwtacha]

Hi there. I am using this to retieve HTML from a webpage

Function GetHTML(url As String) As String    With CreateObject("MSXML2.XMLHTTP")
        .Open "GET", url, False
        .Send
        GetHTML = .ResponseText
    End With
    
End Function

I have created another custom function (fromthewebpage) to extract info from the HTML and put it into an 2d array.

Function fromthewebpage(month,user)
....
....
....
fromthewebpage= udarray(month,user)

When I need the info in the sheet I recall it with =fromthewebpage(x,y) in a cell.

But the size of the array is 13*4 and I need the whole array and each use of the fromthewebpage(x,y) function call GetHTML independently, resulting in 52 retrievals of the page. Are there ways to only call GetHTML once and reuse that info for each use of fromthewebpage.

I imagine either 1) calling GetHTML when opening the workbook and storing the info in a persistent array that I can reference when using fromthewebpage or 2) making fromthewebpage an array function. But I don´t know if that is possible and how to do it.

 

[John_w]

Try something like this (untested, obviously):

Function GetHTML(url As String) As String
    Static previousResponseText As String
    Static previousUrl As String
    If url <> previousUrl Then  
        With CreateObject("MSXML2.XMLHTTP")
            .Open "GET", url, False
            .Send
            previousResponseText = .ResponseText
            previousUrl = url
        End With
    End If
    GetHTML = previousResponseText
End Function