I would like to create a Simple Socket Server in Lazarus, using the built in TSimpleIPCServer. I do not want to use any other framework or product !
There seem to be no documentation on this Component. I have looked all over the Net but I could not find any examples.
But IPC isn't a Simple Socket library it is provide memory sharing to another application. Also in Windows 7 and above isn't easy to communicate with fpc's IPC server.
My advise use or change that software/library:
http://torry.net/vcl/system/appscommunications/ipc.zip
It is working I tested with delphi but for windows it can be compile in lazarus.
Related
Is there any limitation in using a library like stanza.io for communication with an XMPP server like MongooseIM in Nativescript? What other alternatives are there?
If stanza.io supports NativeScript then there should not be any limitations.
On their GitHub main pager they say it's a Modern XMPP in the browser, with a JSON API. So it's mainly for browser env and I'm not sure about NativeScript.
As an alternative way - there is a xmpp.js lib which supports NativeScript. Their doc is a little bit shitty, but using src code there is a way to integrate successfully it.
There is a guide on how to use it for ReactNative, but you can some part from it for NativeScript, especially these part that are connected to the lib itself.
https://medium.com/#connectycube/xmpp-real-time-chat-in-react-native-8d6d5d23dd47
Also you can use some ready XMPP high level platforms for Chat, e.g. https://connectycube.com/2018/12/11/connectycube-textchat-code-sample-for-nativescript/
In this case you do not need to carte about XMPP server installation and monitoring
You will have to find a third party server or host your own one that implements XMPP protocols and connect to same using Websockets or XMPP plugin from your {N} application.
FYI, This XMPP plugin implements the same pod library explained in the MongooseIM docs, but the JavaScript apis are not fully implemented so you might have to access the native apis directly as needed.
You may also refer nativescript-xmpp-client, another exampel for XMPP implementation.
Ive done a lot of researching but I'm a bit overwhelmed by the possibilities i seem to have.
What i want to achieve:
I need to develop a web interface on a linux/windows server, which communicates through tcp via the opc protocol to control some leds.
the plan is that the web interface would open a tcp socket server, where the clients with the leds can connect. when the user gives data to the web interface, it then sends the opc data via the socket to all connected clients (or selected clients). it should also be possible for the web interface to receive answers from the clients.
the problem is, that until now i only had a web interface which i programmed in plain js/php/html, without any help of a framework or something like that.
with that knowledge it is very difficult to imagine how i should realize the communication via tcp. as far as i know plain javascript or php does not support tcp sockets.
1. Websockets
I tried to achieve a similar function with that implementation once, but the problem is that i have to write a separate websocketserver which adds another source for failings. it seemed not to be very stable, which is why i would prefer a "direct" tcp socket connection.
2. Frameworks
Is there a framework which can level me up from plain js/php/html which adds the required functionality? what additional function would a framework give me? I'm not quite understanding the need of a framework.
3. ASP
asp.net seems to be what i want to achieve. a "single-application" web interface which can also target server hardware like tcp or serial. But the problem would be, i think, the enourmous learning curve when developing such an app. i'm also not sure if mono can run the asp.net with full functionality at the moment.
So long story short, what would your approach be?
I think you can do that in Mono and ASP with no problem. But considering that you started your project in php, you can use tcp/ip sockets with it:
PHP TCP/IP example
Best regards
I have a requirement to create a browser plugin. It should be a cross-browser plugin. The look and feel is similar to, say, Ask toolbar. My browser plugin should be able to make calls (using Cisco call control). Internally we will handle that no issue in that. But what is required is that previously we developed website for handling calls, which used java applets to dynamically change the status {Example when there is an incoming call Answer button would get enabled}. Will I be able to achieve it in Browser plugin.
Can I be able to use browser plugin over applet?
Is there any replacement for Java applet in the browser plugin?
Please help me in making a dynamic browser plugin.
Update:
I am planning to go for Kango cross-browser extension Framework. I need to know if Kango or any other extension framework support a socket communication where it can listern for sever update.
Thanks.
Can I use WebSocket (supported in HTML5) in the browser Extension? I learned that WebSocket method could not communicate directly with ordinary server and it need some changes in the server as well.
Ref: Connect to standard socket using WebSocket
Is there any other way other than WebSocket ?
Is there any open source available for javascript library which uses flash player?
If it could be opensource it could be helpful.
Cross browser plugin can be developed using some extension development tools such as Cross Rider or kango . I feel that Cross rider provides good support.
If we are going for Java applet for socket communication, definitely we are ready to face some trouble. Better avoid Java applet.
Socket communication can be achieved in the Web browser using many ways. "Web Socket" is one of them. The only constrain in using it is that it is supported only in HTML5 supporting browser or browser version. IE give support to WebSocket from IE11 only.
Another way to go is using Socket.io . It is having a good way of achieving it by using the available techniques in the client browser. For Example, if the client browser do not have a Flash player (Flash supports socket communication), it uses WebSocket or it "fallback" to available technique supported in browser.
Even node.js is a light weight technique.
The challenge here is we could not communicate with server which support socket with a "websocket" client. We need a proxy, Ref: Connect to standard socket using WebSocket
Hope this should help who need some start on Web Socket communication. If anyone want to add to this I would be very happy.
In my iphone application I am calling (by SOAP post method) a web service which is written in .net and hosted on a server, and its all working fine. But my doubt is, can we write a web service in objective c? And host it on a server? so that we should be able to access it from any of the platforms like .net, php and objectiveC.
I read a fantastic tutorial regarding this question some time ago here.
To be honest, it can be quite difficult to really use this in a productive environment. If you want to get all the features and tools Apple gives to you (what seems to be the intention of your question), you'll have to use a Mac in order to run your service afterwards.
In my opionion using PHP for example (if you need a db also backed up by MySQL) is much easier. Almost all hosters support it and you won't have to worry about setting up a bunch of macs and connecting them via solid and stable cables to the internet (and with that: guarantee availability).
Yes. A web service is just some application that can provide a service over the web. As you can create an application in Objective C, it can be a web service the same as made in any other language.
You can make it run on any server where you have an objective C compiler, however, the framework you use may restrict your choices to the server (ie, you can write objective C on windows, but you wouldn't be able to use the NS framework)
Web services are not limited to a programming language, however you do need to find if there is any framework using objective-c can run on specific server. For example, iiS allows you to use Asp.net which could be implemented using C# or VB.Net.
From the clients who will consume web services, they don't have to be a specific type of device. I think that's the point of web services. The messages travel in between is formatted. For example, a SOAP message is using xml, and that would ensure the message travel on HTTP. Therefore no matter you use iPhone or Android or Blackberry, you should have no problem to make web service calls.
So in general, I think you have to see what kind of web services you want to create, and then see if Apple(I assume) can provide you with a good framework to do it. In terms of client side, as long as your web services are using XML or JSON, it should be well supported.
Hope it helps.
I am looking for an open source framework to build a proprietary protocol onto (Agent/Client talks to a Receiver/Server that stuffs things into a SQL database).
I need session handling (ie login/logout) and some kind of encryption.
I found the Spread Framework which looks great, but does not appear to support authentication or encryption of any kind out of the box.
My preferred language is C, C++, Python, or Perl.
Anyone know of anything off hand? Hoping for something to be out there to save me time rather than doing it the hard way all in *nix sockets ;)
Thanks in advance!
Why not use libcurl, as it can do SSL.
http://curl.haxx.se/libcurl/c/example.html
DJango and DJango ORM, or SQLAlchemy combinations can be a good start. A python base framework and ORM.
Since you are working at the socket level, I assume that you are trying to write an application from the ground up. Or are you trying to run within an existing web server?
Could you use lighttpd with HTTPS & mod_cgi? This isn't really a framework, per se, but it would keep your application portable to other infrastructures.
On the server side, CGI::Session could take care of the session management. Authentication could be done using mod_auth.
Why not use SSL/TLS? On the client you can use libcurl, which works with C, C++, Python, and Perl. On the server, use Apache, lightttp etc, with cgi or your favorite language. You can use mutual authentication to ensure verify the identify of both the client and server, as well as provided an encrypted channel.