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343 lines (315 loc) · 11.6 KB
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(* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is TurboPower LockBox
*
* The Initial Developer of the Original Code is
* TurboPower Software
*
* Portions created by the Initial Developer are Copyright (C) 1997-2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* ***** END LICENSE BLOCK ***** *)
{*********************************************************}
{* LbHttpShell.pas 2.01 *}
{* Copyright (c) 2001 TurboPower Software Co *}
{* All rights reserved. *}
{*********************************************************}
unit LbHttpShell;
interface
uses
SysUtils,
Libc,
QControls,
QForms,
Classes;
type
EExecError = class(Exception);
type
THttpShell = class
private
procedure GetCurrentPath(PathList : TList);
function IsBrowserPresent(PathList : TList; Browser : string) : Boolean;
procedure CallBrowser(Browser : string; Parameters : string;
Website : string; XTerm : Boolean);
function AboutExecAndWait(FileName : PChar; CommandLine : PChar;
Wait : Boolean) : Integer;
procedure FreePaths(PathList : TList);
public
procedure StartBrowser(Website : string);
end;
implementation
type
TBrowserStartCmd = record
Command : string[64];
Parameters : string [255];
XTerm : Boolean; { Start browser in an XTerm }
end;
const
cMaxBrowsers = 25;
cMaxNewsreaders = 18;
{ exception consts }
cForkFailure = 'Unable to fork process.';
cExeFailure = 'Unable to execute process.';
cBrowserFailure = 'Uable to start web browser.' +
'Make sure you have it properly set-up on your system.';
cArgFailure = 'Too many arguments.';
const
{ A reasonably comprehensive list of browsers to try. I haven't tested }
{ most of the lesser known ones. }
cBrowserList : array [1..cMaxBrowsers] of TBrowserStartCmd =
((Command : 'mozilla'; Parameters : '<site>'; Xterm : False),
(Command : 'netscape'; Parameters : '<site>'; Xterm : False),
(Command : 'konquerer'; Parameters : '<site>'; Xterm : False),
(Command : 'gnome-help-browser'; Parameters : '<site>'; Xterm : False),
(Command : 'mosaic'; Parameters : '<site>'; Xterm : False),
(Command : 'mmosaic'; Parameters : '<site>'; Xterm : False),
(Command : 'opera'; Parameters : '<site>'; Xterm : False),
(Command : 'arena'; Parameters : '<site>'; Xterm : False),
(Command : 'amaya'; Parameters : '<site>'; Xterm : False),
(Command : 'lynx'; Parameters : '<site>'; Xterm : True),
(Command : 'kdehelp'; Parameters : '<site>'; Xterm : False), // Requires kfm running
(Command : 'qtmozilla'; Parameters : '<site>'; Xterm : False),
(Command : 'cineast'; Parameters : '<site>'; Xterm : False),
(Command : 'qweb'; Parameters : '<site>'; Xterm : False),
(Command : 'plume'; Parameters : '<site>'; Xterm : False),
(Command : 'surfit'; Parameters : '<site>'; Xterm : False), // Now known as plume
(Command : 'armadillo'; Parameters : '<site>'; Xterm : False),
(Command : 'w3m'; Parameters : '<site>'; Xterm : True),
(Command : 'grail'; Parameters : '<site>'; Xterm : False),
(Command : 'mmm'; Parameters : '<site>'; Xterm : False),
(Command : 'mneumonic'; Parameters : '<site>'; Xterm : False),
(Command : 'gzilla'; Parameters : '<site>'; Xterm : False), // Now known as Armadillo
(Command : 'chimera'; Parameters : '<site>'; Xterm : False), // Chimera 2
(Command : 'express'; Parameters : '<site>'; Xterm : False), // Verge Express
(Command : 'jozilla'; Parameters : '<site>'; Xterm : False)); // JoZilla
NewsreaderList : array [1..cMaxNewsreaders] of TBrowserStartCmd =
((Command : 'mozilla'; Parameters : '-news <site>'; XTerm : False),
(Command : 'netscape'; Parameters : '-news <site>'; XTerm : False),
(Command : 'pan'; Parameters : '<site>'; XTerm : False),
(Command : 'kexpress'; Parameters : '<site>'; XTerm : False),
(Command : 'gnews'; Parameters : '<site>'; XTerm : False),
(Command : 'knews'; Parameters : '<site>'; XTerm : False),
(Command : 'gnus'; Parameters : '<site>'; XTerm : False),
(Command : 'knode'; Parameters : '<site>'; XTerm : False),
(Command : 'krn'; Parameters : '<site>'; XTerm : False),
(Command : 'grin'; Parameters : '<site>'; XTerm : False),
(Command : 'newsflex'; Parameters : '<site>'; XTerm : False),
(Command : 'xvnews'; Parameters : '<site>'; XTerm : False),
(Command : 'xrn'; Parameters : '<site>'; XTerm : False),
(Command : 'tin'; Parameters : '<site>'; Xterm : True),
(Command : 'slrn'; Parameters : '<site>'; XTerm : True),
(Command : 'inn'; Parameters : '<site>'; Xterm : True),
(Command : 'trn'; Parameters : '<site>'; XTerm : True),
(Command : 'rn'; Parameters : '<site>'; XTerm : True));
{ -------------------------------------------------------------------------- }
procedure THttpShell.FreePaths(PathList : TList);
var
i : Integer;
begin
for i := 0 to PathList.Count - 1 do begin
if Assigned(PathList[i]) then
StrDispose(PathList[i]);
end;
end;
{ -------------------------------------------------------------------------- }
function THttpShell.AboutExecAndWait(FileName : PChar; CommandLine : PChar;
Wait : Boolean) : Integer;
const
MaxArgs = 256; { Maximum number of arguments that can }
{ be passed on the command line. }
var
Arguments : Array [0..MaxArgs - 1] of PChar; // Array of arguments
function GetNextArgument(var StartPos : Cardinal) : PChar;
// This gets the next argument from the CommandLine. This function does
// not take into account arguments that contain quotes.
var
FirstPos : Cardinal;
begin
if not Assigned(CommandLine) then begin
Result := nil;
exit;
end;
while(CommandLine[StartPos] = ' ') and (StartPos <= StrLen(CommandLine)) do
Inc(StartPos);
FirstPos := StartPos;
while(CommandLine[StartPos] <> ' ') and (StartPos <= StrLen(CommandLine)) do
Inc(StartPos);
if Trim(Copy(CommandLine, FirstPos, StartPos - FirstPos)) = '' then begin
Result := nil;
exit;
end;
Result := StrAlloc(StartPos - FirstPos + 1);
StrLCopy(Result, CommandLine + FirstPos, StartPos - FirstPos);
Result[StartPos - FirstPos + 1] := #$00;
end;
function GetFirstArgument : PChar;
// The first argument should always be the name of the calling program.
begin
Result := StrAlloc(StrLen(FileName) + 1);
StrPLCopy(Result, FileName, StrLen(FileName));
Result [StrLen(FileName)] := #$00;
end;
procedure SplitArguments;
var
CurrentArgument : integer;
StringPosition : Cardinal;
begin
StringPosition := 0;
CurrentArgument := 1;
Arguments[0] := GetFirstArgument;
repeat
Arguments [CurrentArgument] := GetNextArgument(StringPosition);
Inc(CurrentArgument);
if CurrentArgument > MaxArgs then
raise EExecError.Create(cArgFailure);
until Arguments[CurrentArgument-1] = nil;
end;
procedure ReleaseArgumentMemory;
var
i : integer;
begin
i := 0;
while(Arguments[i] <> nil) do begin
StrDispose(Arguments[i]);
Inc(i);
end;
end;
procedure ForkCommand;
var
pid : pid_t;
Status : integer;
begin
pid := fork;
if pid = -1 then
raise EExecError.Create(cForkFailure)
else if pid = 0 then begin
if execvp(FileName, @Arguments) = -1 then
raise EExecError.Create(cExeFailure);
end else begin
if Wait then
waitpid(pid, @status, WUNTRACED);
end;
end;
begin
Result := 0;
Arguments[0] := nil;
SplitArguments;
try
ForkCommand;
finally
ReleaseArgumentMemory;
end;
end;
{ -------------------------------------------------------------------------- }
procedure THttpShell.CallBrowser(Browser : string; Parameters : string;
Website : string; XTerm : Boolean);
begin
if Pos('<site>', Parameters) > 0 then begin
Parameters := Copy(Parameters, 1, Pos('<site>', Parameters) - 1) +
Website +
Copy(Parameters, Pos('<site>', Parameters) + 6, 255);
end else
Parameters := Parameters + ' ' + Website;
if XTerm then begin
Parameters := '-e ' + Browser + ' ' + Parameters;
Browser := 'xterm';
end;
AboutExecAndWait(PChar(Browser), PChar(Parameters), False);
end;
{ -------------------------------------------------------------------------- }
function THttpShell.IsBrowserPresent(PathList : TList;
Browser : string) : Boolean;
var
i : integer;
begin
Result := False;
for i := 0 to PathList.Count - 1 do begin
if FileExists(PChar(PathList[i]) + '/' + Browser) then begin
Result := True;
exit;
end;
end;
end;
{ -------------------------------------------------------------------------- }
procedure THttpShell.GetCurrentPath(PathList : TList);
function GetNextPath(Path : PChar; var StartPos : Cardinal) : PChar;
var
FirstPos : Cardinal;
begin
if not Assigned(Path) then begin
result := nil;
exit;
end;
while(Path[StartPos] = ':') and(StartPos <= StrLen(Path)) do
Inc(StartPos);
FirstPos := StartPos;
while(Path[StartPos] <> ':') and(StartPos <= StrLen(Path)) do
Inc(StartPos);
if Trim(Copy(Path, FirstPos, StartPos - FirstPos)) = '' then begin
Result := nil;
exit;
end;
Result := StrAlloc(StartPos - FirstPos + 1);
StrLCopy(Result, Path + FirstPos, StartPos - FirstPos);
Result[StartPos - FirstPos + 1] := #$00;
end;
var
WorkPath : PChar;
StartPos : Cardinal;
CurrentPath : PChar;
begin
WorkPath := getenv('PATH');
StartPos := 0;
PathList.Clear;
repeat
CurrentPath := GetNextPath(WorkPath, StartPos);
if Assigned(CurrentPath) then
PathList.Add(CurrentPath);
until CurrentPath = nil;
end;
{ -------------------------------------------------------------------------- }
procedure THttpShell.StartBrowser(Website : string);
var
PathList : TList;
i : integer;
SaveCursor:TCursor;
begin
SaveCursor := Screen.Cursor;
try
Screen.Cursor := crHourGlass;
PathList := TList.Create;
try
GetCurrentPath(PathList);
try
for i := 1 to cMaxBrowsers do begin
if IsBrowserPresent(PathList, cBrowserList[i].Command) then begin
CallBrowser(cBrowserList[i].Command, cBrowserList[i].Parameters,
Website, cBrowserList[i].XTerm);
exit;
end;
end;
raise EExecError.Create(cBrowserFailure);
finally
FreePaths(PathList);
end;
finally
PathList.Free;
end;
finally
Screen.Cursor := SaveCursor;
end;
end;
end.
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