Accessing HTML source in HTMLViewer

General
1

Is there a way to access the HTML source in the HTML Viewer when I load a page with the LoadURL method?

What I want to achieve: Before rendering the HTML I want to parse it through, probably alter it and then reinject it to the HTML Viewer. The result should have a similar functionality like the NoScript-Plugin on Firefox browser – preventing loaded Javascripts from executing without permission.

I am aware that I can solve this problem with a combination of the HTML Viewer and the HTTP/HTTPSSocket but it would have been nice if it would work with the HTML Viewer alone.

From studying the language reference, I would say an easy way is currently not possible but perhaps I am overseeing something ;). Thx in advance.

1 Like
2

Search is your friend
https://forum.xojo.com/5714-html-source-code-as-a-string/0

3

Natascha,

a simple entry in this forum with only 3 entries have 8 files when saved to disk in the complementary folder:

3 css files, 2 js files, 3 png files.

Some html complementary folders have far more items. The search can be tricky.

4

Hi Natascha. I think you are right that this cannot be done with the HTMLViewer alone :frowning:

I believe it might be possible with an MBSPlugin but I’ve not played with that part of MBS yet so I cannot be 100% sure. Christian might be along today, he could confirm this.

1 Like
5

It is no problem to replace things, but you will get problems when the page uses local paths like

Then the page looks wrong because it cannot find the files

6

is this for desktop, iOS or web?

7

MBS Plugins have a lot of HTMLViewer extensions:

[code]dim html as string

#if TargetMacOS then

html = HTMLViewer1.mainFrameMBS.dataSource.data

#elseif TargetWin32 then

if HTMLViewer1.Renderer = 1 then
  html = HTMLViewer1.ChromiumBrowserMBS.MainFrame.Source
else
  html = HTMLViewer1.IEHTMLTextMBS
end if

#elseif TargetLinux then

html = HTMLViewer1.LinuxWebViewMBS.MainFrame.DataSource.Data

#else
?
#endif[/code]
4 ways so we can cover most platforms :slight_smile:

8

[quote=315637:@]Hi Natascha. I think you are right that this cannot be done with the HTMLViewer alone :frowning:

I believe it might be possible with an MBSPlugin but I’ve not played with that part of MBS yet so I cannot be 100% sure. Christian might be along today, he could confirm this.[/quote]

It is quite possible with JavaScript, but indeed, it is not built in. I posted solutions at the thread I linked to.

And of course, it is part of the MBS plugins.

9

Ahh it only worked when I changed the Renderer to WebKit

10

I am not sure StatusChanged fires correctly with native renderer in Windows. You may want to use TitleChanged instead.

11

I still can’t confirm that by the way. I’m concerned about how it happens because that seriously cripples our workarounds.
Windows is significantly slower with triggering StatusChanged, but I haven’t seen it not fire.

12

Cheers everybody!

13

Xojo 2019 R1.1 latest version of plugin:
Doesn’t seem to work well. Code execution freezes in line

> html = HTMLViewer1.ChromiumBrowserMBS.MainFrame.Source

even with a very simple peace of html on the page.

1 Like
14

Sorry for bumping this old thread up again.

This works for me now:

Dim secureSite As New HTTPSecureSocket
secureSite.Secure = True
secureSite.ConnectionType = SSLSocket.TLSv12
Dim Page As String = secureSite.Get(URL, 30)
1 Like
15

This was the only “for sure” way I found to do something similar.