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viewcode.pas
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program ViewCode;
(***************************************************
A simple online code viewer using PrismJS (.com)
***************************************************)
{$MODE OBJFPC}{$H+}
uses
DOS, Classes, SysUtils, StrUtils, DateUtils, FileUtil;
const
APP_TITLE = 'CODE VIEWER';
EXE_NAME = 'viewcode';
type
TSourceFile = record
filePath: string;
fileName: string;
fileType: string;
fileSize: longint;
runnable: boolean;
end;
const
// list of available source code files to show
sourceFiles: array[0..6] of TSourceFile = (
(filePath:'../Applications/'; fileName:'olahkata.pas'; fileType:'pascal'; fileSize: 0; runnable:true ),
(filePath:'../Applications/'; fileName:'template.pas'; fileType:'pascal'; fileSize: 0; runnable:false),
(filePath:''; fileName:'default.js'; fileType:'javascript'; fileSize: 0; runnable:false),
(filePath:''; fileName:'default.css'; fileType:'css'; fileSize: 0; runnable:false),
(filePath:'../'; fileName:'pas2cgi.sh'; fileType:'bash'; fileSize: 0; runnable:false),
(filePath:'../Applications/'; fileName:'viewcode.pas'; fileType:'pascal'; fileSize: 0; runnable:true ),
(filePath:'../Applications/'; fileName:'hello_web.pas'; fileType:'pascal'; fileSize: 0; runnable:true ));
function getValue(const aKey, fromString: string; const defValue: string = ''): string;
var
pStart, pStop: integer;
s: string;
begin
Result := '';
s := Trim(fromString);
pStart := Pos(LowerCase(aKey)+'=', s);
if pStart > 0 then
begin
pStop := PosEx('&', s, pStart);
pStart := pStart + Length(aKey) + 1;
if pStop = 0 then pStop := 1024;
Result := Copy(s, pStart, pStop-pStart);
if (Result = '') and (defValue <> '') then Result := defValue;
end;
end;
var
queryString: string;
sourceFile: TStringList;
selectFileName: string;
selectFileIndex: integer;
timeStart, timeStop: TDateTime;
i: integer;
s: string;
begin
writeln('content-type: text/html;');
writeln;
// set html header
timeStart := Now;
writeln('<!doctype html>');
writeln('<html><head>');
writeln(' <meta charset="UTF-8" lang="id">');
writeln(' <link rel="stylesheet" href="default.css">');
writeln(' <link rel="stylesheet" href="prism.css">');
writeln(' <script>var appName = "',EXE_NAME,'";</script>');
writeln(' <script type="text/javascript" src="default.js"></script>');
writeln(' <script type="text/javascript" src="prism.min.js"></script>');
writeln(' <title>',APP_TITLE,'</title>');
writeln('</head><body>');
// set page header
writeln(' <h3> ');
writeln(' <span class="bigger"><a href="',EXE_NAME,'.cgi" title="Home">⌂</a></span> │ ',APP_TITLE);
writeln(' </h3>');
writeln(' <div class="header"></div>');
writeln(' <div class="content">');
// read app params
queryString := GetEnv('QUERY_STRING');
selectFileName := getValue('file',queryString);
// setup form
writeln('<form method="get" action="',EXE_NAME,'.cgi">');
writeln(' <label>Source files: <select id="cbFile" name="file">');
// fill up selection
selectFileIndex := -1;
writeln(' <option value="" disabled selected>pick a file...</option>');
for i := 0 to High(sourceFiles) do
begin
write(' <option value="',sourceFiles[i].fileName,'"');
if sourceFiles[i].fileName = selectFileName then
begin
write(' selected ');
selectFileIndex := i;
selectFileName := sourceFiles[i].filePath + sourceFiles[i].fileName;
end;
writeln('>',sourceFiles[i].fileName,'</option>');
end;
writeln(' </select></label>');
writeln(' <input type="submit" id="btnSubmit" name="submit" value=" VIEW " />');
writeln('</form>');
// open selected source code file
if selectFileName <> '' then
if FileExists(selectFileName) and (selectFileIndex >= 0) then
begin
writeln('<script>document.title = "',sourceFiles[selectFileIndex].fileName,' — ',APP_TITLE,'";</script>');
sourceFile := TStringList.Create;
try
// open file
sourceFiles[selectFileIndex].fileSize := FileUtil.FileSize(selectFileName);
sourceFile.LoadFromFile(selectFileName);
// encode special chars
for i := 0 to sourceFile.Count-1 do
begin
s := sourceFile[i];
if Pos('<',s) > 0 then s := ReplaceStr(s,'<','<');
if Pos('>',s) > 0 then s := ReplaceStr(s,'>','>');
sourceFile[i] := s;
end;
// print file stats
write('<hr/><p>');
if (sourceFiles[selectFileIndex].runnable) and (sourceFiles[selectFileIndex].fileType = 'pascal') then
write('│ <b><a href="',ReplaceStr(sourceFiles[selectFileIndex].fileName,'.pas','.cgi'),'">',
sourceFiles[selectFileIndex].fileName,'</a></b>')
else
write('│ <b>',sourceFiles[selectFileIndex].fileName,'</b>');
writeln(' │ ',sourceFile.Count,' lines │ ',sourceFiles[selectFileIndex].fileSize,' bytes │');
// print file content
write('<pre class="line-numbers"><code class="language-',sourceFiles[selectFileIndex].fileType,'">');
for i := 0 to sourceFile.Count-1 do writeln(sourceFile[i]);
writeln('</code></pre>');
finally
sourceFile.Free;
end;
end
else
writeln('<br/><span class="error">ERROR</span>: Source file "',selectFileName,'" is NOT available!');
// write page footer
timeStop := Now;
writeln(' </div>');
writeln(' <div class="footer">');
writeln(' This page is served in ',MilliSecondSpan(timeStart,timeStop):0:0,' ms by ');
writeln(' <a href="http://freepascal.org" target=_blank>FreePascal</a>.<br/>');
writeln(' Courtesy of ');
writeln(' <a href="http://beeography.koding.io/">beeography.koding.io</a><br/>');
writeln(' — <a href="viewcode.cgi?file=',EXE_NAME,'.pas">view source code</a>');
writeln(' </div>');
writeln('</body></html>');
end.