Hi!
I have a throughput/performance problem using the latest stable version
of the ICS package. When using a TWSocket derived application over an
TCP/IP connection with high round trip times and small packet sizes (it
is an 155 MBit ATM line) the throughput is very low. To check, if there
is a
Hello Dod,
Are you using ICS in sync or async mode ?
I'm using ICS in async (event driven) mode in my application. The file
is sent in fragments of 256KB in the OnDataSent event handler.
Do yo use same buffer and write-to-disk as Indy ?
When comparing ICS and Indy I did not use my
Hello Dod,
Do you see any CPU overload server side during transfert ?
CPU load varies from 2% to 5% while the FTP file transfer is running.
/Tobias
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A - 1050 Wien
To improve performance you can make your packets equal to the MTU, or
switch Nagle off. There are some notes on Microsoft site about this. If
you search for Nagle on MSDN you will find a lots information about
that. They dont encourage to switch it off but in some cases (maybe
yours) it is
Hi Wilfried,
You find on my site a few programs to test performance with TWSocket.
I have found the PerformanceTest project and tested it. In the first run
it also gave the well-known value of ~1.2MB/s. Then I digged into
TWSocket's Send() function and found the BufSize property. After
changing
Hi SZ,
I think your problem should be in the message pump. What do you use
for that in your thread? When I switched to GetMessage from
PeekMessage, I was WOW!
I use TWSocket's MessageLoop() function in my threaded application which
uses GetMessage() internally. And Wilfried's test programm
Hello Wilfried,
Looks like
http://support.microsoft.com/default.aspx?scid=kb;en-us;823764 is wrong
in my special case or the system is automagically increasing the
Can you resent the URL please ? It seems dead here.
http://support.microsoft.com/default.aspx?scid=kb;en-us;823764
It's the
Hello Arno,
By default winsock's send buffer size is 8 kb which is much bigger
than TFtpCli's constant BLOCK_SIZE of 1460 bytes. So one condition
described in the article is not true since a single send call in
TFtpCli does not fill the whole underlying winsock send buffer.
I realy wonder
Hello Arno,
I would play with sligtly increased SocketSndBufSize and a BufSize set
to something below like 16/8 and 32/16 kb. TWSocket's property
BufSize actually is the block size and the amount of data copied into
the winsock buffer in a single (winsock) send call.
Unfortunately the
I would be very interested if you start this project as my company also
thinks that in the future it might be interesting to port some of our
Windows service applications to GNU/Linux.
When evaluating what way to go I thought that either Kylix could be used
(but is that product still active?) or
Something like attached below? It creates its window thread-save,
but I prefer a timer that was able to use the hidden window(s)
of V6, or may be we think about a windowless timer (Thread, signals,
and WaitForMultipleObjects)?
Just for interest: What is the drawback of using a own window
I have not tried it but from looking at the sources I would say that it
might work if you would change the OnAfterFileOpen event so that it
passes the FStream as a var variable. Then you could initialize that
stream variable with a memory- or stringstream in your event handler.
Maybe you will have
Anyway, I am doing some Visual Studio 2005 projects and I want to have a
good async-component. Basically TWSocket but that it can be used in C# and
.net. Does such exist or is it somehow possible to use TWSocket in such
projects? I was even thinking of doing an ActiveX wrapper around TWSocket
How do you manage missed/double/wrong ordered packets?
Each packet got some sequence ID and alive packets were sent from time
to time. Also there was no special acknowledge packet - each received
packet contained the last successful received ID of the sender. If one
side detects that an
Hello,
The first decision is should I select CVS or SVN ?
Any advice appreciated.
I'm using SVN together with TortoiseSvn each day in my work for more
than a year now. Did not have any serious problems since (the only thing
that I stumbled over is the filename case-sensitivity issue - but that
Fias Norbert István wrote:
The problem is that Indy sends a large amount TCP segments as the
received window increasing and as no drop occured while ICS FTP
client does not increase the number of sent segments, so the
unacknowledged amount of bytes is not increasing.
I have experienced
Hello everybody!
I have a problem related with the ICS package 'IcsDel100.dpk'. I have it
installed fine with Delphi 2006. Now I have a self-made package that
depends on tWSocket and thus has 'IcsDel100' in the packages requires
clause. When I try to compile the package I get the following
Hi!
I am using a tWSocket derived class inside a DLL. One of the users of
the DLL had problems with using the class and it turned out that I had
forgotten to set MultiThreaded to TRUE (as the user of the DLL has
created the class in a separate thread).
My question now is: Is it safe to always
.
Regards,
Tobias
@@VON Tobias Rapp t.rapp~~noa-audio.com @@
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DZ-Jay wrote:
[EMAIL PROTECTED] wrote:
If THttpCli is used to get a webpage with no document name specified,
only directory (www.codegear.com/products) - is it possible to find out
the default document name? Whether it be index.html or main.html or
just some custom name specified on the
Hi!
DZ-Jay wrote:
A way to create a multi-part response is to encapsulate
it as a MIME 822 message. Here's some basic information on this:
http://www.motobit.com/tips/detpg_multiple-files-one-request/
I stumbled over the following lines on that page:
| The situation is even worse if
Arno Garrels wrote:
SSH (Secure Shell) is available on nix platforms.
Well, it is typically used on Unix-like platforms but there is
software available for Windows most notably the popular Putty and WinSCP
tools.
Due to the lack of SSL SSH has been used in the past to tunnel
unsecure FTP on
Hi!
Does the ICS FTP Client support SSH ?
No, SSH is not supported by ICS. I don't know of any SSH implementation
based on ICS (or any other Delphi library) so most likely you will have
to implement it on your own.
We want to use ICS ftp client in a secure mode. And the secure mode must be
Hi!
I'd like to know if anybody of you has some suggestions about how to
tune a tWSocket-based application for data throughput.
Do you change some socket buffer sizes? Like in
WSocket_setsockopt(FHSocket, SOL_SOCKET, SO_SNDBUF, ...);
WSocket_setsockopt(FHSocket, SOL_SOCKET, SO_RCVBUF, ...);
Francois Piette wrote:
Which protocol ?
Well, I'm basically using TCP. My client inherits from tWSocket and uses
it's own XML-based protocol to deliver data blocks of around 256kB to
the server (which is also a self-written Delphi ICS application).
When connecting to the server app over a
Hello Francois,
thanks for your long and descriptive reply.
Using the same client or server, at the same time in the day, are you able
to check for network thruput using other tools ? [...]
Yes, I've tried that and got 12MB/s for standard Windows file copy
(CIFS), 4MB/s for FTP file copy
Olivier Sannier wrote:
Here are a few ideas to get high performances:
4) Enlarge winsock buffers
5) Enlarge TWSocket send buffer (BufSize property) to mach actual network
packet size. By default BufSize is the size of a standard ethernet packet.
What values would you recommend for a
Francois Piette wrote:
Angus and I added UTF-8 support to the TFtpCli V7.
I think Angus and Arno deserve a BIG thank from all of us for the huge work
they've done supporting internationalisation in FTP component.
Thanks guys !
Yes, it's great to hear that! Thanks for all the work that is
Hello,
I am currently trying to implement a HTTP file streaming server using
tHttpServer and I'd like to know if anybody has some advice regarding
the use of threads.
I know that it's basically possible to use tHttpServer without threads
but I suppose that threads are needed in my case because
Hi!
I have found a small bug in ICS V5 HttpSrv.pas within procedure
tHttpConnection.Answer401:
Header := FVersion + ' 401 Unauthorized' + #13#10 +
'WWW-Authenticate: ' +
//'Digest realm=' + FAuthRealm +// original
'Digest realm=' + FAuthRealm
Maurizio Lotauro wrote:
Sooner or later I must install (and use) a svn client :-)
Any suggestion?
When using Windows there is the great TortoiseSVN client
(http://tortoisesvn.tigris.org/) that integrates into the Windows
explorer. Have not found a better tool in the last years - and I really
ineic...@triple-m.ch wrote:
I wrote this tool to check FileMD5 with ICS_V6, ICS_V7 and INDY_10.
It display's the result in a memo with time measurement.
E.g. a 44MB Mpeg File displays:
Host: [WSBIERI] File: [D:\_BuProcVideoData\19052008noch eine
aufzeichung395876456777894.mpg]
MD5 ICS_V6
Alper Albayrak wrote:
Monitoring packages arrived, I see that one of the packages (505 byte) is
divided into 3 packages.
What i want to ask; is this the way tcp protocol transfers data over
network,
or package count is because of the method client uses to send data..?
I once have also
I have found some similar code in function TCustomLineWSocket.DoRecv() from
ICS-V5:
===
--- D:/DelphiComponents/Ics/Delphi/Vc32/WSocket.pas (revision 279)
+++ D:/DelphiComponents/Ics/Delphi/Vc32/WSocket.pas (working copy)
@@
Arno Garrels wrote:
I don't think it is a bug in ICS-V5, since Buffer mostly was of
no type (if memory serves well). This changed in ICS V6 where
Buffer is of type TWSocketData which maps to Pointer in Win32.
That's true. As a programmer coming from C language the typeless var Buffer
thing
Markus Humm wrote:
What is so hard in documenting just a single property or work on those
property overview pages which aren't complete yet? Copying the table of
a already started property list to a not yet started one and modifying
it so that the correct properties are listed is not hard.
My
Fastream Technologies wrote:
Please let us know about their plans for 64-bit compiler support!
https://forums.embarcadero.com/message.jspa?messageID=257995#257995
The plan seems to be clear, only the expected time frame is secret (needs an
NDA).
Regards,
Tobias
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Arno Garrels wrote:
The DLL names are globally writable typed constants, set their values
before the OpenSSL libraries are loaded.
Is there any advantage to use writable typed constants like
const GSSLEAY_DLL_Name : String = 'SSLEAY32.DLL';
instead of
var GSSLEAY_DLL_Name : String =
Hello,
I have ICS package installed within the Delphi personality of BDS2006 but now
I want to use it within the C++ Builder personality. After adding some
missing *.pas files to IcsBcb100.bdsproj BDS complains:
Remove WSocketE, WSockBuf, WSocket, WSocketS, ... were found in required
package
Hello Arno,
You should no longer use ICSv6 but ICSv7 which installs fine with BCB.
I know that the latest version is preffered but I need to use a library built
on top of ICS with BCB so I need the old version (V5 in fact).
In order to install ICS into both personalities you just have to
Hello again,
In order to install ICS into both personalities you just have to change
the Delphi package options to:
Linking | Linker output | Generate all C++ Builder files (including
package libs) and rebuild all.
Thanks for the hint. I tried it and it worked in a way that now the
Hello SZ,
With the Tortoise CVS client when I click checkout and paste the URL
:ext:i...@svn.overbyte.be/ics/branches/icsipv6
it says:
end of file from server
I guess you confused TortoiseCVS - TortoiseSVN. The GUI client for
Subversion (SVN) can be downloaded at
Hello,
I am experiencing throughput problems with my ICS-based network transfer
application and want to ask if anybody knows a tool to debug those kind of
issues (visualize maybe the current network latency, TCP send/receive buffer
fill size, etc.).
Regards,
Tobias
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Arno Garrels wrote:
If I were in your shoes I would at first search my application
for bottlenecks, lengthy blocking tasks, too small data chunks
sent/received etc.
When I search for issues I usually try to divide the area where the problem
possibly exists into two parts and check both
Hello Anton!
destructor TSrvClient.Destroy;
begin
FreeAndNil(FList); // *** set breakpoint here to ensure client is destroyed
***
end;
This should be:
destructor TSrvClient.Destroy;
begin
FreeAndNil(FList);
inherited; // -- added call to ancestor
end;
Regards,
Tobias
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To
It is all much better explained here why blocking is better:
http://www.ararat.cz/synapse/doku.php/about
I would not say that blocking is better. Programming with synchronous
functions needs less callbacks and thus gives more compact code at the cost
of performance. If this is OK depends on the
I guess the centralized trust model of SSL has been a known problem for ages.
Don't understand why they try to make so much noise about it now. IMO the
problem of the alternative model (web of trust) is that it lacks the cash
cow properties and thus is less appealing to certificate authorities.
Angus Robertson wrote:
Maybe it's time to check all our projects for 64-bit compatibility?
:)
Only if your ICS project needs to access more than 2 gigs of memory (or
is it 4), or is a DLL called by other 64-bit applications.
When working with Windows messages I often use a pattern like
Arno Garrels wrote:
No, WPARAM and LPARAM are 64-bit in WIN64 so just cast the pointer to
WParam in your sample.
PostMessage(Handle, WM_MY_MSG, WParam(Msg), 0);
Oh, that's fine!
NativeInt and NativeUInt are Delphi's integer types that always have
the size of a Pointer. Integer will _not
Angus Robertson - Magenta Systems Ltd wrote:
ICS does not currently support FireMonkey or Mac OS-X, it needs a lot of
work since Linux is not event driven like Windows, and makes use of
threads to prevent blocking. ICS did support Kylix for Linux several
years ago, so some work has been done.
Angus Robertson - Magenta Systems Ltd wrote:
There may be such an event system in FireMonkey, don't actually know.
But supporting ICS with FireMonkey and Mac OS-X is not simply a case of a
few bug fixes and conditional compilation changes which is effectively
all that is needed for 64-bit
Hi!
I have added a new function AnswerStreamPart in component THttpConnection
to allow answering partial retrieve requests using any tStream descendant
(see attached patch file).
It would be nice if the patch could be considered for inclusion in the
upstream ICS sources and I am open for
Index: OverbyteIcsHttpSrv.pas
===
--- OverbyteIcsHttpSrv.pas (revision 887)
+++ OverbyteIcsHttpSrv.pas (working copy)
@@ -807,6 +807,9 @@
const Status : String;
Hi!
I would like to extend my existing ICS-based HTTP server to allow upload
and removal of files on the server. From reading the HTTP specs at [1] it
seems that the natural commands for these actions would be PUT [2] and
DELETE [3].
Unfortunately the THttpServer/THttpConnection components do
Arno Garrels wrote (in a response to RTT):
Problem is that AnswerStreamAcceptRange can only be used
for OK-responses.
Yes, that is right and like you said I only use it for some of the
responses where it makes sense for the client (to allow seeking within
streamed audio files).
I just
Hi,
I am currently debugging some problems in my application using the
THttpServer/THttpConnection components regarding the support for HEAD
requests. As far as I understand the specs no response body should be
returned for HEAD but it seems that THttpConnection does send response
bodies in
I wrote:
[...] As far as I understand the specs no response body should be
returned for HEAD but it seems that THttpConnection does send response
bodies in procedure ProcessPost() in case of 400/404/etc. answers.
^---^
I wanted to say ProcessHead() here.
Regards,
Arno Garrels wrote:
Feb 07, 2012 V7.44 Arno - The HEAD method *MUST NOT* return a message-body in
the response. Do not skip compression on HEAD requests, we
need to send the correct size. Method SendDocument
simplified and added two overloads. AnswerStreamAcceptRange
got an overload too.
Hi,
in order to support HTTP DELETE requests [1] in the THttpCli component I
have made some small additions (see patch below). It would be great if you
could consider including the patch in the upstream version of ICS.
Note: I first considered adding the new request type by overloading the
Arno Garrels wrote:
Thanks, however the method name conflicts with System.Delete.
The new method should be IMO renamed to either Del, Dele or Delete_.
TList, TStrings, TDataSet and more objects have a Delete method so I see
no real problem here. However if this is the only thing preventing my
OK, just checked in your patch rev. #896
Thanks!
Regards,
Tobias
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Hi!
I am currently using the TSmtpCli component to send email notifications to
users. I want to change the HdrTo property value to additionaly contain the
user name instead of just the plain email address.
As my user name is retrieved from a database as WideString I wonder
how I handle non-ASCII
Thanks Arno for the help.
Would it also work if I would set Allow8BitChars to TRUE, Charset to
UTF-8 and manually encode all string properties like HdrTo,
HdrSubject and MailMessage.Text using Utf8Encode()?
My assumption was that the header lines should not contain non-ASCII
characters, but
Angus Robertson - Magenta Systems Ltd wrote:
The headers may have different charset to the content, indeed they are
usually ASCII. Never use the body charset to decode the headers.
OK, I see. I guess I have all necessary parts together now. Thanks!
Regards,
Tobias
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Hi,
when using the HTTP server component with some custom TStream descendant
together with partial GET requests I noticed that the Read method of
THttpRangeStream incorrectly handles the situation where Read returns less
bytes that requested. It switches to the next stream member in the list
Angus Robertson - Magenta Systems Ltd wrote:
Thanks, the V8 repository will be updated this morning.
Nice. Any chance the patch could also be applied to V7 (trunk)?
Regards,
Tobias
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Angus Robertson - Magenta Systems Ltd wrote:
OK, both V7 and V8 are updated with your fix, and the 'nightly' zips
updated early.
I also added another web server fix that previously was only in V8.
Great.
Thanks,
Tobias
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