Indy9控件for Delphi

This document provides some notes concerning Indy 9.0.4 beta. ============================================ Winsock 2 ============================================ In Windows 95, your program may raise an EIdWS2StubError exception with the message "Error on loading Winsock2 library (WS2_32.DLL)". This happens because Indy 9.0 requires Winsock 2 to be installed and Winsock 2 is not installed on Windows 95 by default. Your users should install a FREE Winsock 2 update that is available at: http://www.microsoft.com/windows95/downloads/contents/wuadmintools/s_wunetworkingtools/w95sockets2/default.asp This is particularly important because it does fix some bugs in the original Winsock 1.1 stack included in Windows 95. We decided to base Indy on the Winsock 2 specification because that has a better API than Winsock 1.1. We have included a DLL in your Indy \Source\WS2DetectDLL directory that can be used in your installation programs to help determine if the user needs to install Winsock 2. We also include sample Wise Installation System and Inno Setup scripts that illustrate how to use the .DLL in your installations. Documentation for this is in the README.htm in that directory. We include the original pascal source-code and the source-code for the port to assembly language. ============================================ IdAntiFreeze ============================================ Starting with this version of Indy, the IdAntiFreeze unit is now in the design- time packages instead of the run-time packages. This change was required so that the Indy run-time package does not depend upon the VCL GUI in Win32 and CLX in Linux. TIdAntiFreeze is unique in that it is the only run-time unit that is permitted to link with GUI units such as Forms. That was triggering a dependency on the VCL in the run-time unit package. For C++Builder, we include a directive that forces the IdAntiFreeze object file to be directly linked into the program that uses Indy even if the developer is using run-time packages. ============================================ IdCompressionIntercept ============================================ You may sometimes get the following compiler errors with this file: IdCompressionIntercept.pas(331) Error: Incompatible types IdCompressionIntercept.pas(152) Error: Unsatisfied forward or external declaration: '_tr_init' IdCompressionIntercept.pas(153) Error: Unsatisfied forward or external declaration: '_tr_tally' IdCompressionIntercept.pas(154) Error: Unsatisfied forward or external declaration: '_tr_flush_block' IdCompressionIntercept.pas(155) Error: Unsatisfied forward or external declaration: '_tr_align' IdCompressionIntercept.pas(156) Error: Unsatisfied forward or external declaration: '_tr_stored_block' IdCompressionIntercept.pas(157) Error: Unsatisfied forward or external declaration: 'adler32' IdCompressionIntercept.pas(158) Error: Unsatisfied forward or external declaration: 'inflate_blocks_new' IdCompressionIntercept.pas(159) Error: Unsatisfied forward or external declaration: 'inflate_blocks' IdCompressionIntercept.pas(160) Error: Unsatisfied forward or external declaration: 'inflate_blocks_reset' IdCompressionIntercept.pas(161) Error: Unsatisfied forward or external declaration: 'inflate_blocks_free' IdCompressionIntercept.pas(162) Error: Unsatisfied forward or external declaration: 'inflate_set_dictionary' IdCompressionIntercept.pas(163) Error: Unsatisfied forward or external declaration: 'inflate_trees_bits' IdCompressionIntercept.pas(164) Error: Unsatisfied forward or external declaration: 'inflate_trees_dynamic' IdCompressionIntercept.pas(165) Error: Unsatisfied forward or external declaration: 'inflate_trees_fixed' IdCompressionIntercept.pas(166) Error: Unsatisfied forward or external declaration: 'inflate_trees_free' IdCompressionIntercept.pas(167) Error: Unsatisfied forward or external declaration: 'inflate_codes_new' IdCompressionIntercept.pas(168) Error: Unsatisfied forward or external declaration: 'inflate_codes' IdCompressionIntercept.pas(169) Error: Unsatisfied forward or external declaration: 'inflate_codes_free' IdCompressionIntercept.pas(170) Error: Unsatisfied forward or external declaration: '_inflate_mask' IdCompressionIntercept.pas(171) Error: Unsatisfied forward or external declaration: 'inflate_flush' IdCompressionIntercept.pas(172) Error: Unsatisfied forward or external declaration: 'inflate_fast' IdCompressionIntercept.pas(189) Error: Unsatisfied forward or external declaration: 'deflateInit_' IdCompressionIntercept.pas(196) Error: Unsatisfied forward or external declaration: 'deflate' IdCompressionIntercept.pas(203) Error: Unsatisfied forward or external declaration: 'deflateEnd' IdCompressionIntercept.pas(213) Error: Unsatisfied forward or external declaration: 'inflateInit_' IdCompressionIntercept.pas(220) Error: Unsatisfied forward or external declaration: 'inflate' IdCompressionIntercept.pas(227) Error: Unsatisfied forward or external declaration: 'inflateEnd' IdCompressionIntercept.pas(234) Error: Unsatisfied forward or external declaration: 'inflateReset' Indy40.dpk(196) Fatal: Could not compile used unit 'IdCompressionIntercept.pas' Do not be alarmed. This is due to a bug in DCC32 in Delphi 4, 5, 6, plus C++Builder, 4, 5, and 6. There is a work around for this issue. The work around is to compile this unit separately from the other units and than build Indy with a command such as DCC32 using the /M parameter. Do NOT use the /B parameter as that does force everything to be recompiled triggering the DCC32 error. The batch files FULLC4.BAT, FULLC5.BAT, FULLC6.BAT, FULLD4.BAT, FULLD5.BAT and FULLD6.BAT now have the work around in them so we recommend that you use those to build Indy. Borland is aware of the issue. ============================================ Delphi 4 Standard ============================================ Borland Delphi 4 Standard Edition is longer supported. We have become painfully aware of an issue with this Delphi version and Indy 9.0. The issue is that Borland did not include the SyncObjs unit in that version. Unfortunately, Indy 9.0 requires that unit. We had tried to deal with this limitation by writing a unit that implements what we had needed (TCriticalSection). Unfortunately, that has not worked out at all for Indy 9.0, we need to use other things in the SyncObjs unit, we need to facilitate further growth in Indy, and we have concentrate our focus on Indy itself rather than rewriting some thread functionality for both Win32 and Linux. Thus, we are in a painful position. We could try to avoid use of SyncObjs but that we would have a harder time using some advanced multi-threading techniques that have become necessary. We doubt that this work would really be a good idea just to keep supporting a small minority of users. Thus, we have to do a difficult thing and that is to stop supporting Delphi 4 Standard Edition users so we can better support a larger user base. If you still are using Delphi 4 Standard, you still have the following options: 1) Keep using Indy 8.0 because that does work with Delphi 4 Standard Edition 2) Try using other component sets such as Internet Component Suite. There are other component sets available commercially that may work 3) Upgrade to a later version of Delphi such as Borland Delphi 6 Personal Edition for personal use only or purchase Delphi 6.0 Professional Edition. ============================================ C++Builder Notes ============================================ Starting with this version of Indy, we are discontinuing our C++Builder .BPK's. This does not mean dropping C++Builder support at all but we are implementing it in a different way. It turns out that C++Builder support can be achieved by compiling Indy with some special parameters and than making a .LIB for it. Interestingly enough, C++Builder g