ch17l01.txt

《Web编程专家指南》

Listing 17.1 Look for a specific named variable.

function TForm1.CookieFromString(cookie, name : String) : String;
var
   beginPos, endPos : integer;
   restOfString : String;
begin
    {set the beginPos to the beginning of the input name value}
    beginPos := Pos(name,cookie) + Length(name) + 1;  {+1 for '=' character}
    {if the search was successful}
    if(beginPos > (Length(name)+1)) then
    begin
         restOfString := Copy(cookie, beginPos, Length(cookie));
         endPos := Pos(';',restOfString);
         CookieFromString := Copy(cookie, beginPos, endPos);
    end
    else
        CookieFromString := 'Error';
end;