Re: [twsocket] HTTPCLI for WebSocket connection ?
Hello Angus, Sure I was not asking for any development ;-) Right now I handle it thru WebSocket, and manage enough of websocket protocol for the need I have to communicate with an internal server I have to deal with. THTTPCli descendant should be OK. For what I learned until now it would need to : - Manage HTTP header dedicated to websocket negociation like : Connection: Upgrade Upgrade: Websocket Sec-WebSocket-Version: xx (different Websocket versions) - Manage Sec-WebSocket-Key mono and double keys handshake with the BASE64 SHA-1 GUID salt - Handle the 2 or 4 bytes binary structured packet that is present in front of each websocket frame (websocket is frame based not streamed data flow) and contain among other informations the size of the upcoming frame, but one thing to take care is that this packet can be 2 or 4 bytes depending the size of the data in the frame. - There is also a special "ping" keep-alive feature (server and/or client mode) that can be done thru the packet header. Neverless the day you want a beta tester I may help. regards. >> For people who want to understand how WebSocket protocol works I found >> a this very interesting and crystal clear article : >> >> http://lucumr.pocoo.org/2012/9/24/websockets-101/ ARMSL> Thanks, I've got various reading about websockets, but no time to think about them, ARMSL> although it is on the long term ICS wish list I published a while ago. ARMSL> I'm sure you can borrow some of the server side implementation for the client, ARMSL> creating keys and frames will be very similar in client and server. ARMSL> My inclination would be client websockets should be a separate ICS component, a ARMSL> descendent of THttpCli, overriding the necessary events, with only minor changes in ARMSL> THttpCli, which is a stable component. ARMSL> We also need a test websockets web site, a quick Google suggests some echo test ARMSL> sites (like http://www.websocket.org), but ideally there should be some pages on my ARMSL> public IIS/8.5 server which seems to support websockets (at least it was an install ARMSL> option). ARMSL> My priority this month is the ACME protocol to automate acquiring and installing SSL ARMSL> certificates, which has got delayed due to other work. ARMSL> Angus mailto:do...@yahoo.com -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] HTTPCLI for WebSocket connection ?
> For people who want to understand how WebSocket protocol works I found > a this very interesting and crystal clear article : > > http://lucumr.pocoo.org/2012/9/24/websockets-101/ Thanks, I've got various reading about websockets, but no time to think about them, although it is on the long term ICS wish list I published a while ago. I'm sure you can borrow some of the server side implementation for the client, creating keys and frames will be very similar in client and server. My inclination would be client websockets should be a separate ICS component, a descendent of THttpCli, overriding the necessary events, with only minor changes in THttpCli, which is a stable component. We also need a test websockets web site, a quick Google suggests some echo test sites (like http://www.websocket.org), but ideally there should be some pages on my public IIS/8.5 server which seems to support websockets (at least it was an install option). My priority this month is the ACME protocol to automate acquiring and installing SSL certificates, which has got delayed due to other work. Angus -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] HTTPCLI for WebSocket connection ?
Hello Angus, For people who want to understand how WebSocket protocol works I found a this very interesting and crystal clear article : http://lucumr.pocoo.org/2012/9/24/websockets-101/ regards. >> I am attempting THttpCli adding specific HTTTP Headers to see it works ARMSL> There are THttpCli events for sent and received headers, into which you can add your ARMSL> extra Upgrade:, etc, headers, and check if they are received. ARMSL> This should be easy enough for testing, once there is a list of the actual ARMSL> headers used both ways, they could be added to the real component, but ideally we ARMSL> need a server to test against. ARMSL> Not sure what happens after the upgrade handshake, presumably the traffic continues ARMSL> on the same socket but bypassing the HTTP protocol. That might be fun to ARMSL> implement... ARMSL> Angus mailto:do...@yahoo.com -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] HTTPCLI for WebSocket connection ?
Hello, First of all, happy new year to all ICS lovers ;-) Well I think I said victory too soon, in fact the socket stay connected but no event is triggered by ICS, OnDataPush, OnDataPush2, OnDocData, OnDocBegin, none of them triggers, sniffing the network show data reception from websocket server. The stream is a flow of JSON stuctures (each block of JSON is preceeded by an 8 bytes binary block), there is no CRLF at all inside JSON or between packs. I know it's difficult to answer that from an external point of view but any idea why no event is triggered ? regards. >> I am attempting THttpCli adding specific HTTTP Headers to see it works ARMSL> There are THttpCli events for sent and received headers, into which you can add your ARMSL> extra Upgrade:, etc, headers, and check if they are received. ARMSL> This should be easy enough for testing, once there is a list of the actual ARMSL> headers used both ways, they could be added to the real component, but ideally we ARMSL> need a server to test against. ARMSL> Not sure what happens after the upgrade handshake, presumably the traffic continues ARMSL> on the same socket but bypassing the HTTP protocol. That might be fun to ARMSL> implement... ARMSL> Angus mailto:do...@yahoo.com -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] HTTPCLI for WebSocket connection ?
> I am attempting THttpCli adding specific HTTTP Headers to see it works There are THttpCli events for sent and received headers, into which you can add your extra Upgrade:, etc, headers, and check if they are received. This should be easy enough for testing, once there is a list of the actual headers used both ways, they could be added to the real component, but ideally we need a server to test against. Not sure what happens after the upgrade handshake, presumably the traffic continues on the same socket but bypassing the HTTP protocol. That might be fun to implement... Angus -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] HTTPCLI for WebSocket connection ?
Hello Angus, Yes I already googled around before asking and found this server side source code but found no client side inside it, the client example is only .html web browser side. I am attempting THttpCli adding specific HTTTP Headers to see it works the only thing is to keep THttCli opened for a long time to receive the data and also being able to send data thru it time to time. I found also source code for Synapse and Indy but I am married to ICS for years ;-) regards. Wednesday, December 30, 2015, 5:41:00 PM, you wrote: >> Do somebody already used THttpCli as HTTP WebSocket client or should I >> use more level TWSocket and handle all the HTTP protocol myself ? ARMSL> Stan Korotky wrote an ICS Websockets server component back in 2012, which is ARMSL> available from http://ics-websockets.googlecode.com/svn/trunk ARMSL> But I'm not aware of anyone offering a Websockets client demo or component. A quick ARMSL> search of this archive does not find any client information, just discussions back ARMSL> in early 2012 about the above server implementation. ARMSL> Angus -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] HTTPCLI for WebSocket connection ?
> Do somebody already used THttpCli as HTTP WebSocket client or should I > use more level TWSocket and handle all the HTTP protocol myself ? Stan Korotky wrote an ICS Websockets server component back in 2012, which is available from http://ics-websockets.googlecode.com/svn/trunk But I'm not aware of anyone offering a Websockets client demo or component. A quick search of this archive does not find any client information, just discussions back in early 2012 about the above server implementation. Angus -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
[twsocket] HTTPCLI for WebSocket connection ?
Hello, Do somebody already used THttpCli as HTTP WebSocket client or should I use more level TWSocket and handle all the HTTP protocol myself ? regards. -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
