ST3VO
asked on
get website/webpage css link from html code
Hi all,
I need a way to get the css file link from some html code...say in a memo...
Here is what it looks like:
<link rel="stylesheet" type="text/css" href="style.css">
These are the rules/what it needs to look for:
First we need to know it's a css link or external file link...so it looks for:
this: <link
next we get the filename I need so we look here:
We look after ths --> href="
and before this --> ">
And this is what I need to be left with: style.css
Hope you can help
thx
st3vo
I need a way to get the css file link from some html code...say in a memo...
Here is what it looks like:
<link rel="stylesheet" type="text/css" href="style.css">
These are the rules/what it needs to look for:
First we need to know it's a css link or external file link...so it looks for:
this: <link
next we get the filename I need so we look here:
We look after ths --> href="
and before this --> ">
And this is what I need to be left with: style.css
Hope you can help
thx
st3vo
This is exactly what you're asking for, btw I'd use "stylesheet" as key beacause <link could contain the link for the icon...
Let me know if you need to change it for looking for the word "stylesheet"
Let me know if you need to change it for looking for the word "stylesheet"
function ExtractCSSFileName(Text: String): string;
var
AUrl: String;
i,t,p,x: Integer;
begin
if pos('<link',text) > 0 then
begin
t := posex('href=', Text, pos('<link',text)+5)+6;
x := posex('>', Text, pos('<link',text)+5)-1;
AUrl := copy(Text,t,x-t);
i := LastDelimiter('/', AUrl);
Result := Copy(AUrl, i + 1, Length(AUrl) - (i));
end else result := 'Not Found';
end;
procedure TForm1.Button1Click(Sender: TObject);
var
s: string;
begin
s := ExtractCSSFileName(memo1.text);
ShowMessage(s);
end;
Ok, this is using "stylesheet" instead of <link as startkey for the search.
I think this is better for your purpose.
I think this is better for your purpose.
function ExtractCSSFileName(Text: String): string;
var
AUrl: String;
i,t,p,x: Integer;
begin
if pos('"stylesheet"',text) > 0 then
begin
t := posex('href=', Text, pos('"stylesheet"',text)+12)+6;
x := posex('>', Text, pos('"stylesheet"',text)+12)-1;
AUrl := copy(Text,t,x-t);
i := LastDelimiter('/', AUrl);
Result := Copy(AUrl, i + 1, Length(AUrl) - (i));
end else result := 'Not Found';
end;
procedure TForm1.Button1Click(Sender: TObject);
var
s: string;
begin
s := ExtractCSSFileName(memo1.text);
ShowMessage(s);
end;
ASKER
Hmm..that's a good point actually...what about the fact that the filename...or last 3 characters will always be css or .css as the last 4.
Could that help to get it more precise? I cannot use stylesheet as I would have to change it myself it the html didn't have it before hand,,,know what I mean?
Could that help to get it more precise? I cannot use stylesheet as I would have to change it myself it the html didn't have it before hand,,,know what I mean?
SO you want to grab any .css name found in the html?
ASKER
I was thinking any .css found in a <link tag which is after the href=" ??? Make sense?
btw: I get an error: [DCC Error] Unit1.pas(61): E2003 Undeclared identifier: 'posex' what do I need to add to the uses pls?
btw: I get an error: [DCC Error] Unit1.pas(61): E2003 Undeclared identifier: 'posex' what do I need to add to the uses pls?
Add strutils
ASKER
Yeah...got that thanks :o)
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ASKER
Perfect Thanks!!!
//find the link
iStart:=Pos('<a href="',ItemBuf) + Length('<a href="');
iStop:=Pos('">',ItemBuf);
Code got from this link:
Simple HTML page Scraping with Delphi
http://delphi.about.com/library/code/ncaa062502a.htm