parsingweb-scrapinggambas

Web scraping with Gambas, is it possible?

Using Gambas, is it possible to download a webpage to a string, and then parse that string. I know I can parse the data in the string once I have the data, I'm struggling with getting the data from the webpage into a string.

Solution

  • You can use the HttpClient class from the gb.net.curl component

    There you can also find an example how to read the data either synchronous or asynchronous.

    To get the data from the web in a string you could write following function (it would be synchronous in this case)

    Public Function GetTextFromUrl(url As String) As String
    Dim client As New HttpClient As "client"

    client.URL = url
    client.async = False
    client.Get()

    ' an error occured
    If client.Status < 0 Then
        Return ""
    Endif

    ' no data available
    If Not Lof(client) Then
        Return ""
    Endif

    ' Reads the data from the server and returns it as a String
    Return Read #client, Lof(client)

End

    And you could call the function like this:

    Public Sub Main()
    Print GetTextFromUrl("http://stackoverflow.com")
End