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Cromis.ISAPI.Server.pas
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(*
* This software is distributed under BSD license.
*
* Copyright (c) 2009-2010 Iztok Kacin, Cromis ([email protected]).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* - Neither the name of the Iztok Kacin nor the names of its contributors may be
* used to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* =============================================================================
* ISAPI server Implementation. Allows to build standalone ISAPI enabled servers
* =============================================================================
* NOTICE OF CODE ORIGIN
*
* This code was derived from the original code of author "Serhiy Perevoznyk"
* The original code "idISAPIRunner" can still be found at VCLComponents.com site.
* The URL is: http://www.vclcomponents.com/Delphi/Winsock___Internet/idRunner-info.html
*
* The code was taken as a starting point and then mainly written from scratch
* keeping some of the healthy code parts. So I am not in any way an author of
* the original idea. But I am the author of all the changes and new code parts.
*
* ============================================================================
* 24/08/2010 (1.0.0)
* - Initial implementation
* 24/08/2010 (1.0.1)
* - ReturnCode added
* - Do not silently eat exceptions
* 12/06/2012 (1.1.0)
* - Use the new hash unit
* ============================================================================
*)
unit Cromis.ISAPI.Server;
interface
uses
Windows, SysUtils, Classes, Isapi2, WinSock, Math, {$IFDEF UNICODE} AnsiStrings, {$ENDIF}
IniFiles,
// cromis units
Cromis.Streams, Cromis.Hashing, Cromis.Unicode;
const
cNullCharSize = 2;
const
cErrorExtVersionNotAssigned = 'Internal server error. GetExtensionVersion procedure not assigned';
cErrorExtProcNotAssigned = 'Internal server error. HttpExtensionProc procedure not assigned';
cErrorProcessingRequest = 'Internal server error. Error Processing Request';
cErrorIncorectVersion = 'Internal server error. Incorrect version';
cErrorModuleNotFound = 'The module was not found';
const
{ Session support for ISAPI modules }
HSE_REQ_IS_KEEP_CONN = (HSE_REQ_END_RESERVED + 8);
HSE_REQ_SEND_RESPONSE_HEADER_EX = (HSE_REQ_END_RESERVED + 16);
HSE_REQ_MAP_URL_TO_PATH_EX = (HSE_REQ_END_RESERVED + 12);
HSE_REQ_ABORTIVE_CLOSE = (HSE_REQ_END_RESERVED + 14);
ERROR_INSUFFICIENT_BUFFER = 122; { Some call require the
application to pass in a buffer
filled with data. This error is
returned if the data buffer is too
small. For example: DosSetFileInfo
requires 4 bytes of data. If a
two byte buffer is passed in then
this error is returned.
error_buffer_overflow is used when
the output buffer in not big enough. }
type
HSE_URL_MAPEX_INFO =
record
lpszPath: array[0..MAX_PATH - 1] of CHAR; // Physical path root mapped to
dwFlags: DWORD; // Flags associated with this URL path
cchMatchingPath: DWORD; // Number of matching characters in physical path
cchMatchingURL: DWORD; // Number of matching characters in URL
dwReserved1: DWORD;
dwReserved2: DWORD;
end;
LPHSE_URL_MAPEX_INFO = ^HSE_URL_MAPEX_INFO;
THSE_URL_MAPEX_INFO = HSE_URL_MAPEX_INFO;
type
{
HSE_SEND_HEADER_EX_INFO allows an ISAPI application to send headers
and specify keep-alive behavior in the same call.
}
HSE_SEND_HEADER_EX_INFO =
record
pszStatus: LPCSTR; // HTTP status code eg: "200 OK"
pszHeader: LPCSTR; // HTTP header
cchStatus: DWORD; // number of characters in status code
cchHeader: DWORD; // number of characters in header
fKeepConn: BOOL; // keep client connection alive?
end;
// header ex info
LPHSE_SEND_HEADER_EX_INFO = ^HSE_SEND_HEADER_EX_INFO;
THSE_SEND_HEADER_EX_INFO = HSE_SEND_HEADER_EX_INFO;
type
TOnLogParameter = procedure(const LogMsg: string; const ConnID: HCONN) of Object;
TParamsList = class(TStringList)
private
procedure InitializeList;
public
function GetParam(const Name: string): string;
procedure SetParam(const Name, Value: string);
end;
TECBData = class
// the ECB block as defined in ISAPI
ECB: TEXTENSION_CONTROL_BLOCK;
// other ECB related fields
RedirectURL: string;
WaitEvent: Cardinal;
KeepAlive: Boolean;
DataPos: Cardinal;
// response related data
OutputStream: TMemoryStream;
OutputParams: TParamsList;
CookieList: TParamsList;
// request related data
HTTPHeaders: TParamsList;
InputParams: TParamsList;
// ECBData notification routines
LogParameterNotify: TOnLogParameter;
// save and load to stream methods
procedure LoadFromStream(const Stream: TStreamStorage);
procedure SaveToStream(const Stream: TStreamStorage);
// constructor and destructor
constructor Create(const ConnID: Cardinal);
destructor Destroy; override;
end;
TECBDataList = class
private
FEBCList: TCardinalHashTable;
FCriticalSection: TRTLCriticalSection;
public
constructor Create;
destructor Destroy; override;
function AcquireNewECB: TECBData;
function GetECB(const ConnID: HCONN): TECBData;
procedure DeleteECB(const ConnID: HCONN);
end;
TISAPIServer = class
private
FReturnCode: Cardinal;
FLibraryList: TStringList;
FOnLogParameter: TOnLogParameter;
FCriticalSection: TRTLCriticalSection;
function InternalUnloadDLL(const DLLIndex: Integer; const Ask: Boolean): Boolean;
public
constructor Create;
destructor Destroy; override;
function Execute(const DllName: string; const ControlBlock: TECBData; const Unload: Boolean = False): Boolean;
property OnLogParameter: TOnLogParameter read FOnLogParameter write FOnLogParameter;
property ReturnCode: Cardinal read FReturnCode;
end;
VersionFunc = function(var Ver: THSE_VERSION_INFO): Boolean; stdcall;
ProcFunc = function(var ECB: TEXTENSION_CONTROL_BLOCK): LongInt; stdcall;
{
The CBGetServerVariable function retrieves information about an HTTP
connection or about IIS itself.
Parameters:
ConnID - Specifies the connection handle.
VariableName - A null-terminated string that indicates which variable
is requested. The following table lists the possible variables.
Buffer - Points to the buffer to receive the requested information.
Size - Points to a DWORD that indicates the size of the buffer
pointed to by Buffer. On successful completion, the DWORD contains
the size of bytes transferred into the buffer, including the
null-terminating byte.
}
function CBGetServerVariable(ConnID: HCONN; VariableName: PAnsiChar; Buffer: Pointer;
var Size: DWORD): Boolean; stdcall;
{
The ServerSupportFunction is a callback function that is supplied in the
EXTENSION_CONTROL_BLOCK that is associated with the current HTTP request.
ServerSupportFunction can be used to perform a variety of tasks.
}
function CBServerSupport(ConnID: HCONN; HSERRequest: DWORD; Buffer: Pointer;
Size: LPDWORD; DataType: LPDWORD): Boolean; stdcall;
{
The WriteClient function is a callback function that is supplied in the
EXTENSION_CONTROL_BLOCK for a request sent to the ISAPI extension.
It sends the data present in the given buffer to the client that made the request.
}
function CBWriteClient(ConnID: HCONN; Buffer: Pointer; var Bytes: DWORD;
dwReserved: DWORD): Boolean; stdcall;
//The CBReadClient function reads data from the body of the client's HTTP request
function CBReadClient(ConnID: HCONN; Buffer: Pointer; var Size: DWORD): Boolean; stdcall;
// utility function that assigns an unicode string to a new PAnsiChar buffer
procedure AssignStringToPAnsiChar(var Destination: PAnsiChar; const Source: ustring);
var
ECBDataList: TECBDataList;
VariableHash: TStringHash;
implementation
procedure FillVariableHashTable;
begin
// fill the hash table
VariableHash.Add('AUTH_TYPE', 1);
VariableHash.Add('AUTH_NAME', 2);
VariableHash.Add('AUTH_PASS', 3);
VariableHash.Add('CONTENT_LENGTH', 4);
VariableHash.Add('CONTENT_TYPE', 5);
VariableHash.Add('GATEWAY_INTERFACE', 6);
VariableHash.Add('PATH_INFO', 7);
VariableHash.Add('PATH_TRANSLATED', 8);
VariableHash.Add('QUERY_STRING', 9);
VariableHash.Add('REMOTE_ADDR', 10);
VariableHash.Add('REMOTE_HOST', 11);
VariableHash.Add('REMOTE_USER', 12);
VariableHash.Add('REQUEST_METHOD', 13);
VariableHash.Add('SCRIPT_NAME', 14);
VariableHash.Add('SERVER_NAME', 15);
VariableHash.Add('SERVER_PORT', 16);
VariableHash.Add('SERVER_PROTOCOL', 17);
VariableHash.Add('SERVER_SOFTWARE', 18);
VariableHash.Add('HTTP_COOKIE', 19);
VariableHash.Add('HTTP_USER_AGENT', 20);
VariableHash.Add('URL', 21);
VariableHash.Add('HTTP_CACHE_CONTROL', 22);
VariableHash.Add('HTTP_DATE', 23);
VariableHash.Add('HTTP_ACCEPT', 24);
VariableHash.Add('HTTP_FROM', 25);
VariableHash.Add('HTTP_HOST', 26);
VariableHash.Add('HTTP_IF_MODIFIED_SINCE', 27);
VariableHash.Add('HTTP_REFERER', 28);
VariableHash.Add('HTTP_CONTENT_ENCODING', 29);
VariableHash.Add('HTTP_CONTENT_VERSION', 30);
VariableHash.Add('HTTP_DERIVED_FROM', 31);
VariableHash.Add('HTTP_EXPIRES', 32);
VariableHash.Add('HTTP_TITLE', 33);
VariableHash.Add('HTTP_CONNECTION', 34);
VariableHash.Add('HTTP_AUTHORIZATION', 35);
VariableHash.Add('DOCUMENT_ROOT', 36);
VariableHash.Add('SERVER_ADMIN', 37);
VariableHash.Add('SERVER_ADDR', 38);
VariableHash.Add('HTTP_ACCEPT_LANGUAGE', 39);
VariableHash.Add('HTTP_ACCEPT_ENCODING', 40);
VariableHash.Add('HTTP_CLIENT_IP', 41);
VariableHash.Add('REDIRECT_STATUS', 42);
VariableHash.Add('HTTP_REDIRECT_STATUS', 43);
VariableHash.Add('REDIRECT_URL', 44);
VariableHash.Add('HTTP_IDSESSION', 45);
VariableHash.Add('ALL_RAW', 46);
VariableHash.Add('APP_POOL_ID', 47);
end;
procedure AssignStringToPAnsiChar(var Destination: PAnsiChar; const Source: ustring);
begin
Destination := StrNew(PAnsiChar(AnsiString(Source)));
end;
function EncodeStringToAnsiString(const Value: string): AnsiString;
begin
Result := {$IFDEF UNICODE}UTF8Encode(Value){$ELSE}Value{$ENDIF};
end;
function DecodeAnsiString(const Value: AnsiString): ustring;
begin
Result := {$IFDEF UNICODE}UTF8ToWideString(Value){$ELSE}UTF8Decode(Value){$ENDIF};
end;
function IPAddrToName(const IPAddr: string): string;
var
SockAddrIn: TSockAddrIn;
HostEnt: PHostEnt;
WSAData: TWSAData;
begin
WSAStartup($101, WSAData);
SockAddrIn.sin_addr.s_addr := inet_addr(PAnsiChar(Utf8Encode(IPAddr)));
HostEnt := gethostbyaddr(@SockAddrIn.sin_addr.S_addr, 4, AF_INET);
if HostEnt <> nil then
Result := string(StrPas(Hostent^.h_name))
else
Result := '';
end;
function CBGetServerVariable(ConnID: HCONN; VariableName: PAnsiChar; Buffer: Pointer; var Size: DWORD): Boolean;
const
v_AUTH_TYPE = 1;
v_AUTH_NAME = 2;
v_AUTH_PASS = 3;
v_CONTENT_LENGTH = 4;
v_CONTENT_TYPE = 5;
v_GATEWAY_INTERFACE = 6;
v_PATH_INFO = 7;
v_PATH_TRANSLATED = 8;
v_QUERY_STRING = 9;
v_REMOTE_ADDR = 10;
v_REMOTE_HOST = 11;
v_REMOTE_USER = 12;
v_REQUEST_METHOD = 13;
v_SCRIPT_NAME = 14;
v_SERVER_NAME = 15;
v_SERVER_PORT = 16;
v_SERVER_PROTOCOL = 17;
v_SERVER_SOFTWARE = 18;
v_HTTP_COOKIE = 19;
v_HTTP_USER_AGENT = 20;
v_URL = 21;
v_HTTP_CACHE_CONTROL = 22;
v_HTTP_DATE = 23;
v_HTTP_ACCEPT = 24;
v_HTTP_FROM = 25;
v_HTTP_HOST = 26;
v_HTTP_IF_MODIFIED_SINCE = 27;
v_HTTP_REFERER = 28;
v_HTTP_CONTENT_ENCODING = 29;
v_HTTP_CONTENT_VERSION = 30;
v_HTTP_DERIVED_FROM = 31;
v_HTTP_EXPIRES = 32;
v_HTTP_TITLE = 33;
v_HTTP_CONNECTION = 34;
v_HTTP_AUTHORIZATION = 35;
v_DOCUMENT_ROOT = 36;
v_SERVER_ADMIN = 37;
v_SERVER_ADDR = 38;
v_HTTP_ACCEPT_LANGUAGE = 39;
v_HTTP_ACCEPT_ENCODING = 40;
v_HTTP_CLIENT_IP = 41;
v_REDIRECT_STATUS = 42;
v_HTTP_REDIRECT_STATUS = 43;
v_REDIRECT_URL = 44;
v_HTTP_IDSESSION = 45;
v_ALL_RAW = 46;
v_APP_POOL_ID = 47;
function GetFieldByName(const ECB: TECBData; const AFieldName : AnsiString) : string;
begin
Result := ECB.HTTPHeaders.GetParam(string(AFieldName));
end;
procedure CreateStringEntry(const Input: string);
var
TempString: AnsiString;
begin
{$IFDEF UNICODE}TempString := UTF8Encode(Input){$ELSE}TempString := Input{$ENDIF};
StrPCopy(PAnsiChar(Buffer), PAnsiChar(TempString));
Size := Length(TempString) + SizeOf(AnsiChar);
end;
function AdjustHTTP(const Name: AnsiString): AnsiString;
const
SHttp = AnsiString('HTTP_'); { do not localize }
begin
if Pos(SHttp, Name) = 1 then
Result := Copy(Name, 6, MaxInt)
else
Result := Name;
end;
function GetFieldByNameEx(const ECB: TECBData; const AFieldName : AnsiString) : string;
var
NewFieldName : AnsiString;
begin
NewFieldName := AdjustHTTP(AFieldName);
// get the result from the HTTP headers
Result := ECB.HTTPHeaders.GetParam(string(NewFieldName));
if Result = '' then
begin
NewFieldName := StringReplace(NewFieldName, AnsiChar('_'), AnsiChar('-'), [rfReplaceALL]);
Result := ECB.HTTPHeaders.GetParam(string(NewFieldName));
end;
end;
var
ECB: TECBData;
tmpS: string;
VarNum: Integer;
NamePos: Integer;
begin
VarNum := VariableHash.ValueOf(string(VariableName));
ECB := ECBDataList.GetECB(ConnID);
Result := True;
if VarNum = -1 then
begin
tmpS := GetFieldByNameEx(ECB, VariableName);
if tmpS <> '' then
begin
CreateStringEntry(tmpS);
Result := True;
end
else
begin
StrPCopy(PAnsiChar(Buffer), #0);
Result := False;
Size := 0;
end;
Exit;
end;
case VarNum of
v_AUTH_TYPE: CreateStringEntry('Basic');
v_AUTH_NAME: CreateStringEntry(ECB.InputParams.GetParam('AuthUsername'));
v_AUTH_PASS: CreateStringEntry(ECB.InputParams.GetParam('AuthPassword'));
v_CONTENT_LENGTH: CreateStringEntry(ECB.HTTPHeaders.GetParam('Content-Length'));
v_CONTENT_TYPE: CreateStringEntry(ECB.HTTPHeaders.GetParam('Content-Type'));
v_GATEWAY_INTERFACE: CreateStringEntry('ISAPI');
v_PATH_INFO: CreateStringEntry(string(ECB.ECB.lpszPathTranslated));
v_PATH_TRANSLATED: CreateStringEntry(ECB.InputParams.GetParam('Document'));
v_QUERY_STRING: CreateStringEntry(ECB.InputParams.GetParam('QueryParams'));
v_REMOTE_ADDR: CreateStringEntry(ECB.InputParams.GetParam('RemoteIP'));
v_REMOTE_HOST: CreateStringEntry(IPAddrToName(ECB.InputParams.GetParam('RemoteIP')));
v_REMOTE_USER: CreateStringEntry(ECB.InputParams.GetParam('AuthUsername'));
v_REQUEST_METHOD: CreateStringEntry(ECB.InputParams.GetParam('Command'));
v_SCRIPT_NAME: CreateStringEntry(ECB.InputParams.GetParam('ScriptName'));
v_SERVER_NAME: CreateStringEntry(ECB.InputParams.GetParam('Host'));
v_SERVER_PORT: CreateStringEntry(ECB.InputParams.GetParam('Port'));
v_SERVER_PROTOCOL: CreateStringEntry(ECB.InputParams.GetParam('Protocol'));
v_SERVER_SOFTWARE: CreateStringEntry(ECB.InputParams.GetParam('Software'));
v_HTTP_COOKIE: CreateStringEntry(ECB.HTTPHeaders.GetParam('Cookie'));
v_HTTP_USER_AGENT: CreateStringEntry(ECB.HTTPHeaders.GetParam('User-Agent'));
v_APP_POOL_ID: CreateStringEntry(ECB.InputParams.GetParam('AppPool'));
v_ALL_RAW: CreateStringEntry(ECB.HTTPHeaders.Text);
v_URL:
begin
NamePos := Pos('.DLL', UpperCase(ECB.InputParams.GetParam('Document')));
case NamePos > 0 of
True: tmpS := Copy(ECB.InputParams.GetParam('Document'), 1, NamePos + 3);
False: tmpS := ECB.InputParams.GetParam('Document');
end;
CreateStringEntry(tmpS);
end;
//v 3.0
v_HTTP_CACHE_CONTROL: CreateStringEntry(GetFieldByNameEx(ECB, 'CACHE_CONTROL'));
v_HTTP_DATE: CreateStringEntry(GetFieldByName(ECB, 'DATE'));
v_HTTP_ACCEPT: CreateStringEntry(GetFieldByName(ECB, 'ACCEPT'));
v_HTTP_FROM: CreateStringEntry(GetFieldByName(ECB, 'FROM'));
v_HTTP_HOST: CreateStringEntry(GetFieldByName(ECB, 'HOST'));
v_HTTP_IF_MODIFIED_SINCE: CreateStringEntry(GetFieldByNameEx(ECB, 'IF-MODIFIED-SINCE'));
v_HTTP_REFERER: CreateStringEntry(GetFieldByName(ECB, 'IF-MODIFIED-REFERER'));
v_HTTP_CONTENT_ENCODING: CreateStringEntry(GetFieldByName(ECB, 'CONTENT-ENCODING'));
v_HTTP_CONTENT_VERSION: CreateStringEntry(GetFieldByName(ECB, 'CONTENT-VERSION'));
v_HTTP_DERIVED_FROM: CreateStringEntry(GetFieldByName(ECB, 'DERIVED-FROM'));
v_HTTP_EXPIRES: CreateStringEntry(GetFieldByName(ECB, 'EXPIRES'));
v_HTTP_TITLE: CreateStringEntry(GetFieldByName(ECB, 'TITLE'));
v_HTTP_CONNECTION: CreateStringEntry(GetFieldByName(ECB, 'CONNECTION'));
v_HTTP_AUTHORIZATION: CreateStringEntry(GetFieldByName(ECB, 'AUTHORIZATION'));
v_DOCUMENT_ROOT: CreateStringEntry(ECB.InputParams.GetParam('DocumentRoot'));
v_SERVER_ADMIN: CreateStringEntry(ECB.InputParams.GetParam('ServerAdmin'));
v_SERVER_ADDR: CreateStringEntry(ECB.InputParams.GetParam('RemoteIP'));
v_HTTP_ACCEPT_LANGUAGE: CreateStringEntry(GetFieldByName(ECB, 'ACCEPT-LANGUAGE'));
v_HTTP_ACCEPT_ENCODING: CreateStringEntry(GetFieldByName(ECB, 'ACCEPT-ENCODING'));
v_HTTP_CLIENT_IP: CreateStringEntry(ECB.InputParams.GetParam('RemoteIP'));
v_REDIRECT_STATUS: CreateStringEntry('200');
v_HTTP_REDIRECT_STATUS: CreateStringEntry('200');
v_REDIRECT_URL: CreateStringEntry(ECB.InputParams.GetParam('Document'));
v_HTTP_IDSESSION: CreateStringEntry(ECB.InputParams.GetParam('SessionID'));
else
Result := False;
end;
end;
function CBServerSupport(ConnID: HCONN; HSERRequest: DWORD; Buffer: Pointer; Size: LPDWORD; dataType: LPDWORD): Boolean;
var
ECB: TECBData;
tmpS: string;
Index: Integer;
Cookie: string;
tmpPath: string;
TempUTF8: AnsiString;
OutputData: AnsiString;
HeaderList: TParamsList;
MapInfo: THSE_URL_MAPEX_INFO;
HeaderInfoEx: THSE_SEND_HEADER_EX_INFO;
begin
ECB := ECBDataList.GetECB(ConnID);
tmpS := string(PAnsiChar(Buffer));
Result := True;
case HSERRequest of
HSE_REQ_END_RESERVED + 20: ECB.InputParams.SetParam('SessionID', tmpS);
HSE_REQ_ABORTIVE_CLOSE: ;
HSE_REQ_MAP_URL_TO_PATH :
begin
tmpPath := IncludeTrailingPathDelimiter(ECB.InputParams.GetParam('DocumentRoot'));
tmpPath := ExpandFilename(tmpPath + tmpS);
// encode the string based on the unicode or not
TempUTF8 := EncodeStringToAnsiString(tmpPath);
if (DWORD(Length(TempUTF8)) > size^) then
begin
SetLastError(ERROR_INSUFFICIENT_BUFFER);
Result := False;
Exit;
end;
StrPCopy(PAnsiChar(Buffer), PAnsiChar(TempUTF8));
// set the size for the buffer for the content
Size^ := Length(TempUTF8) + SizeOf(AnsiChar);
end;
HSE_REQ_MAP_URL_TO_PATH_EX :
begin
tmpPath := IncludeTrailingPathDelimiter(ECB.InputParams.GetParam('DocumentRoot'));
TmpPath := ExpandFilename(tmpPath + tmpS);
// encode the string based on the unicode or not
TempUTF8 := EncodeStringToAnsiString(tmpPath);
MapInfo := THSE_URL_MAPEX_INFO(Pointer(DataType)^);
Move(TempUTF8[1], MapInfo.lpszPath[0], Length(TempUTF8));
end;
HSE_APPEND_LOG_PARAMETER:
begin
if Assigned(ECB.LogParameterNotify) then
ECB.LogParameterNotify(tmpS, ConnID);
end;
// not supported by our server
HSE_REQ_TRANSMIT_FILE: Result := False;
HSE_REQ_DONE_WITH_SESSION: SetEvent(ECB.WaitEvent);
HSE_REQ_IS_KEEP_CONN: ECB.KeepAlive := Boolean(Buffer);
HSE_REQ_SEND_URL_REDIRECT_RESP, HSE_REQ_SEND_URL: ECB.RedirectURL := Copy(tmpS,1, Length(tmpS));
HSE_REQ_SEND_RESPONSE_HEADER_EX :
begin
HeaderInfoEx := HSE_SEND_HEADER_EX_INFO(Buffer^);
//parsing headers
HeaderList := TParamsList.Create;
try
HeaderList.Text := string(Copy(HeaderInfoEx.pszHeader, 0, HeaderInfoEx.cchHeader));
if HeaderList[HeaderList.Count - 1] = '' then
HeaderList.Delete(HeaderList.Count - 1);
if HeaderInfoEx.fKeepConn then
HeaderList.SetParam('Connection', 'Keep-Alive');
for Index := 0 to HeaderList.Count - 1 do
begin
if Pos('Set-Cookie: ', HeaderList[Index]) = 1 then
begin
Cookie := Copy(HeaderList[Index], 12, Length(HeaderList[Index]) - 11);
ECB.CookieList.Add(Cookie);
end;
end;
ECB.OutputParams.SetParam('Location', HeaderList.GetParam('Location'));
ECB.OutputParams.SetParam('Pragma', HeaderList.GetParam('Pragma'));
if HeaderList.GetParam('Content-type') <> '' then
ECB.OutputParams.SetParam('Content-Type', HeaderList.GetParam('Content-Type'));
if ECB.OutputParams.GetParam('Location') <> '' then
ECB.ECB.dwHttpStatusCode := 302;
if (HeaderList.IndexOfName('Date') > 0) then
ECB.OutputParams.SetParam('Date', HeaderList.GetParam('Date'));
if (HeaderList.IndexOfName('Expires') > 0) then
ECB.OutputParams.SetParam('Expires', HeaderList.GetParam('Expires'));
if (HeaderList.IndexOfName('LastModified') > 0) then
ECB.OutputParams.SetParam('LastModified', HeaderList.GetParam('LastModified'));
finally
HeaderList.Free;
end;
OutputData := Copy(HeaderInfoEx.pszStatus, 0, HeaderInfoEx.cchStatus);
WriteToStreamAsUTF8(ECB.OutputStream, OutputData);
end;
HSE_REQ_SEND_RESPONSE_HEADER:
begin
HeaderList := TParamsList.Create;
try
TempUTF8 := Copy(PAnsiChar(DataType), 1, Length(PAnsiChar(DataType)) - 2);
HeaderList.Text := DecodeAnsiString(TempUTF8);
if ECB.KeepAlive then
HeaderList.SetParam('Connection', 'Keep-Alive');
for Index := 0 to HeaderList.Count - 1 do
begin
if Pos('Set-Cookie: ', HeaderList[Index]) = 1 then
begin
Cookie := Copy(HeaderList[Index], 12, Length(HeaderList[Index]) - 11);
ECB.CookieList.Add(Cookie);
end;
end;
ECB.OutputParams.SetParam('Location', HeaderList.GetParam('Location'));
ECB.OutputParams.SetParam('Pragma', HeaderList.GetParam('Pragma'));
if HeaderList.GetParam('Content-type') <> '' then
ECB.OutputParams.SetParam('Content-Type', HeaderList.GetParam('Content-Type'));
if ECB.OutputParams.GetParam('Location') <> '' then
ECB.ECB.dwHttpStatusCode := 302;
if HeaderList.IndexOfName('Date') > 0 then
ECB.OutputParams.SetParam('Date', HeaderList.GetParam('Date'));
if (HeaderList.IndexOfName('Expires') > 0) then
ECB.OutputParams.SetParam('Expires', HeaderList.GetParam('Expires'));
if HeaderList.IndexOfName('LastModified') > 0 then
ECB.OutputParams.SetParam('LastModified', HeaderList.GetParam('LastModified'));
finally
HeaderList.Free;
end;
end;
else
Result := False;
end;
end;
function CBWriteClient(ConnID: HCONN; Buffer: Pointer; var Bytes: DWORD; dwReserved: DWORD): Boolean;
begin
Result := True;
try
ECBDataList.GetECB(ConnID).OutputStream.Write(Buffer^, Bytes);
except
Result := False;
Bytes := 0;
end;
end;
function CBReadClient(ConnID: HCONN; Buffer: Pointer; var Size: DWORD): Boolean;
var
ECB: TECBData;
begin
Result := True;
try
ECB := ECBDataList.GetECB(ConnID);
if ECB.DataPos < ECB.ECB.cbTotalBytes then
begin
Size := Min(Size, ECB.ECB.cbTotalBytes - ECB.DataPos);
Move(ECB.ECB.lpbData^, Buffer^, Size);
Inc(ECB.DataPos, Size);
end;
except
Result := False;
Size := 0;
end;
end;
{ TISAPIServer }
constructor TISAPIServer.Create;
begin
InitializeCriticalSection(FCriticalSection);
FLibraryList := TStringList.Create;
end;
destructor TISAPIServer.Destroy;
var
I: Integer;
begin
// unload all loaded dlls
EnterCriticalSection(FCriticalSection);
try
for I := 0 to FLibraryList.Count -1 do
InternalUnloadDLL(I, False);
finally
LeaveCriticalSection(FCriticalSection);
end;
// delete critical section and library list
DeleteCriticalSection(FCriticalSection);
FreeAndNil(FLibraryList);
inherited;
end;
function TISAPIServer.Execute(const DllName: string; const ControlBlock: TECBData; const Unload: Boolean): Boolean;
var
Version: VersionFunc;
dllHandle: Cardinal;
ProcessFunc: ProcFunc;
VersionInfo: THSE_VERSION_INFO;
begin
FReturnCode := HSE_STATUS_ERROR;
if not FileExists(DllName) then
begin
WriteToStreamAsString(ControlBlock.OutputStream, cErrorModuleNotFound);
ControlBlock.ECB.dwHttpStatusCode := 404;
raise Exception.Create(cErrorModuleNotFound);
end;
EnterCriticalSection(FCriticalSection);
try
dllHandle := StrToIntDef(FLibraryList.Values[DllName], 0);
if dllHandle = 0 then
begin
dllHandle := LoadLibrary(PChar(DllName));
FLibraryList.Values[DllName] := IntToStr(dllHandle);
end;
finally
LeaveCriticalSection(FCriticalSection);
end;
// get function addresses from the loaded dll library
@Version := GetProcAddress(dllHandle, PChar('GetExtensionVersion'));
@ProcessFunc := GetProcAddress(dllHandle, PCHar('HttpExtensionProc'));
if (@Version = nil) then
begin
WriteToStreamAsString(ControlBlock.OutputStream, cErrorExtVersionNotAssigned);
ControlBlock.ECB.dwHttpStatusCode := 500;
raise Exception.Create(cErrorExtVersionNotAssigned);
end;
if (@ProcessFunc = nil) then
begin
WriteToStreamAsString(ControlBlock.OutputStream, cErrorExtProcNotAssigned);
ControlBlock.ECB.dwHttpStatusCode := 500;
raise Exception.Create(cErrorExtProcNotAssigned);
end;
if not Version(VersionInfo) then
begin
WriteToStreamAsString(ControlBlock.OutputStream, cErrorIncorectVersion);
ControlBlock.ECB.dwHttpStatusCode := 500;
raise Exception.Create(cErrorIncorectVersion);
end;
ControlBlock.WaitEvent := CreateEvent(nil, false, false, nil);
try
// assign event handling routine to control block
ControlBlock.LogParameterNotify := FOnLogParameter;
FReturnCode := ProcessFunc(ControlBlock.ECB);
Result := FReturnCode = HSE_STATUS_SUCCESS;
if FReturnCode = HSE_STATUS_ERROR then
begin
WriteToStreamAsString(ControlBlock.OutputStream, cErrorProcessingRequest);
ControlBlock.ECB.dwHttpStatusCode := 500;
raise Exception.Create(cErrorProcessingRequest);
end;
// wait until the processing is complete
if FReturnCode = HSE_STATUS_PENDING then
begin
WaitForSingleObject(ControlBlock.WaitEvent, INFINITE);
FReturnCode := HSE_STATUS_SUCCESS;
Result := True;
end;
finally
// always close the event handle
CloseHandle(ControlBlock.WaitEvent);
end;
if Unload then
begin
EnterCriticalSection(FCriticalSection);
try
InternalUnloadDLL(FLibraryList.IndexOfName(DllName), False);
finally
LeaveCriticalSection(FCriticalSection);
end;
end;
end;
function TISAPIServer.InternalUnloadDLL(const DLLIndex: Integer; const Ask: Boolean): Boolean;
var
Handle: THandle;
CanUnload: Boolean;
TermProc: TTerminateExtension;
begin
CanUnload := True;
Result := False;
if DLLIndex > -1 then
begin
Handle := StrToInt(FLibraryList.ValueFromIndex[DLLIndex]);
@TermProc := GetProcAddress(Handle, 'TerminateExtension');
if Assigned(TermProc) then
CanUnload := not Ask or TermProc(HSE_TERM_ADVISORY_UNLOAD);
if CanUnload then
begin
TermProc(HSE_TERM_MUST_UNLOAD);
FLibraryList.Delete(DLLIndex);
FreeLibrary(Handle);
Result := True;
end;
end;
end;
{ TECBData }
constructor TECBData.Create(const ConnID: Cardinal);
begin
OutputStream := TMemoryStream.Create;
OutputParams := TParamsList.Create;
InputParams := TParamsList.Create;
HTTPHeaders := TParamsList.Create;
CookieList := TParamsList.Create;
RedirectURL := '';
DataPos := 0;
ECB.cbSize := SizeOf(TEXTENSION_CONTROL_BLOCK);
ECB.dwVersion := MakeLong(HSE_VERSION_MINOR, HSE_VERSION_MAJOR);
ECB.ServerSupportFunction := @CBServerSupport;
ECB.GetServerVariable := @CBGetServerVariable;
ECB.lpszLogData := 'DEFAULT LOG DATA';
ECB.WriteClient := @CBWriteClient;
ECB.ReadClient := @CBReadClient;
ECB.lpszPathTranslated := nil;
ECB.lpszContentType := nil;
ECB.lpszQueryString := nil;
ECB.lpszPathInfo := nil;
ECB.lpszMethod := nil;
ECB.lpbData := nil;
ECB.cbTotalBytes := 0;
ECB.cbAvailable := 0;
ECB.ConnID := ConnID;
end;
destructor TECBData.Destroy;
begin
// clean allocated ECB memory
StrDispose(ECB.lpszPathTranslated);
StrDispose(ECB.lpszQueryString);
StrDispose(ECB.lpszContentType);
StrDispose(ECB.lpszPathInfo);
StrDispose(ECB.lpszMethod);
FreeMem(ECB.lpbData);
ECB.lpbData := nil;
// release all other data
FreeAndNil(OutputStream);
FreeAndNil(OutputParams);
FreeAndNil(InputParams);
FreeAndNil(HTTPHeaders);
FreeAndNil(CookieList);
inherited;
end;
procedure TECBData.LoadFromStream(const Stream: TStreamStorage);
var
DataStream: TMemoryStream;
begin
ECB.dwHttpStatusCode := Stream.ReadInteger('ECB_dwHttpStatusCode');
AssignStringToPAnsiChar(ECB.lpszPathTranslated, Stream.ReadString('ECB_lpszPathTranslated'));
AssignStringToPAnsiChar(ECB.lpszContentType, Stream.ReadString('ECB_lpszContentType'));
AssignStringToPAnsiChar(ECB.lpszQueryString, Stream.ReadString('ECB_lpszQueryString'));
AssignStringToPAnsiChar(ECB.lpszPathInfo, Stream.ReadString('ECB_lpszPathInfo'));
AssignStringToPAnsiChar(ECB.lpszMethod, Stream.ReadString('ECB_lpszMethod'));
// read the data
if Stream.Exists('ECB_lpbData') then
begin
DataStream := TMemoryStream.Create;
try
Stream.ReadStream('ECB_lpbData', DataStream);
DataStream.Seek(0, soFromBeginning);
if DataStream.Size > 0 then
begin
ECB.cbAvailable := DataStream.Size;
ECB.cbTotalBytes := DataStream.Size;
ECB.lpbData := AllocMem(DataStream.Size + cNullCharSize);
// read the actual data from the stream to buffer
DataStream.Read(ECB.lpbData^, DataStream.Size);
end;
finally
DataStream.Free;
end;
end;
Stream.ReadStream('OutputStream', OutputStream);
OutputParams.Text := Stream.ReadString('OutputParams');
HTTPHeaders.Text := Stream.ReadString('HTTPHeaders');
InputParams.Text := Stream.ReadString('InputParams');
CookieList.Text := Stream.ReadString('CookieList');
RedirectURL := Stream.ReadString('RedirectURL');
KeepAlive := Stream.ReadBoolean('KeepAlive');
end;
procedure TECBData.SaveToStream(const Stream: TStreamStorage);
var
DataStream: TMemoryStream;
begin
Stream.WriteString('ECB_lpszPathTranslated', string(ECB.lpszPathTranslated));
Stream.WriteString('ECB_lpszContentType', string(ECB.lpszContentType));
Stream.WriteString('ECB_lpszQueryString', string(ECB.lpszQueryString));
Stream.WriteString('ECB_lpszPathInfo', string(ECB.lpszPathInfo));
Stream.WriteString('ECB_lpszMethod', string(ECB.lpszMethod));
Stream.WriteInteger('ECB_dwHttpStatusCode', ECB.dwHttpStatusCode);
// assign the form data
if ECB.lpbData <> nil then
begin
DataStream := TMemoryStream.Create;
try
DataStream.Write(ECB.lpbData^, ECB.cbAvailable);
DataStream.Seek(0, soFromBeginning);
// write the buffer to the ECB data stream
Stream.WriteStream('ECB_lpbData', DataStream);
finally
DataStream.Free;
end;
end;
OutputStream.Seek(0, soFromBeginning);
Stream.WriteStream('OutputStream', OutputStream);
Stream.WriteString('OutputParams', OutputParams.Text);
Stream.WriteString('HTTPHeaders', HTTPHeaders.Text);
Stream.WriteString('InputParams', InputParams.Text);
Stream.WriteString('CookieList', CookieList.Text);
Stream.WriteString('RedirectURL', RedirectURL);
Stream.WriteBoolean('KeepAlive', KeepAlive);
end;
{ TECBDataList }
constructor TECBDataList.Create;
begin
InitializeCriticalSection(FCriticalSection);
FEBCList := TCardinalHashTable.Create;
end;
destructor TECBDataList.Destroy;
begin
FreeAndNil(FEBCList);
DeleteCriticalSection(FCriticalSection);
inherited;
end;
function TECBDataList.AcquireNewECB: TECBData;
begin
EnterCriticalSection(FCriticalSection);
try
Result := TECBData.Create(FEBCList.Count);
FEBCList.Add(FEBCList.Count, Result);
finally