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Want to build an web based Instant Messaging system similar to www.chatzy.com
The question is what is the best way to go about it?
Go soley the Ajax way, where i write a script that continually pings and updates a database for u conversation?
Or play around with XMPP?
If the answer is XMPP? i would appreciate any pointer to any online resource that details how XMPP can be used in building such services...(Done some couple of searches via google but results came in vogue)
I would be using PHP, but can use Python too, if it offers a better solution to getting this done.
Thanks
XMPP/BOSH
Right now I would use XMPP/BOSH to write web-based IM. I found Prosody the easiest server that supports BOSH. Then you don't need to write any server-side code at all.
Then for the javascript I would use strophe.js
The future
Like Pablo pointed out you could look at websockets. But Pablo is misinformed about gmail. It does not use websockets. The major drawback of websockets is browser support. It is the future, but not yet.
Wrong
polling does not scale. I would not recommend it.
Using AJAX to ping and update a database is not a very good option.
I would suggest you reading about WebSockets. It's the way GMAIL's chat (among other) work.
If you are looking to develop using PHP and little javascript, checkout Jaxl Framework for building web applications. http://github.com/abhinavsingh/JAXL
Use ejabberd/prosody as jabber server, they are stable and scalable enough to give you enough throughput.
Using websockets is surely recommended, but alas not all browsers support them till date.
Related
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I am working on a project where we are looking to build a REST API from scratch. So my initial thoughts were to utilise one of the relatively new aysnc non-blocking I/O frameworks.
I've been looking at the Typesafe framework (Scala, Akka, Play).
Is this a good solution for a RESTful API?
Are there any good (up to date) tutorials/examples that people could provide links to?
Also, I came across spray.io. From what I can gather this seems to be a good alternative to using Play if all I want to build is a REASTful API?
Is that true?
Any good tutorials for this?
I would really like to use Akka and its Actors model from the outset.
Separately I read that Typesafe acquired spray.io to integrate it into the Typesafe framework.
Has this been done yet? If I download the latest version of Typesafe do I get spray bundled in with it?
Finally, hosting. What would people suggest for hosting such an API with this type of framework? AWS, Google, Cloud Foundry, Heroku?
The service will ultimately need to be extremely scalable.
Does anyone know of any good links that cover a lot of the above? i.e. deploying a spray based API on Cloud Foundry for example?
Thanks for the help.
Your question is far too broad, prone to opinion-based answers. Anyway, my two cents:
I've been looking at the Typesafe framework (Scala, Akka, Play). Is
this a good solution for a RESTful API?
IMHO, the best current solution if you want to both grow your system and sleep in peace.
Are there any good (up to date) tutorials/examples that people could
provide links to?
Plenty of them, all around. Check the following, for example:
http://akka.io/docs/ (the official Akka documentation, which I find great)
https://typesafe.com/activator/templates (templates for almost anything you would want to learn/do, including Akka, Play, Spray, and many more)
https://www.playframework.com/documentation/2.3.x/Home (official Play documentation, in case you want to use it)
Also, I came across spray.io. From what I can gather this seems to be
a good alternative to using Play if all I want to build is a REASTful
API? Is that true? Any good tutorials for this?
If you are planning to do only a RESTful API, yes, seems like a good way to go. For tutorials, see the official site and the activator templates listed above.
Separately I read that Typesafe acquired spray.io to integrate it into
the Typesafe framework. Has this been done yet? If I download the
latest version of Typesafe do I get spray bundled in with it?
As far as I understand, Akka is implementing its very own http module, based on the work of spray.io team. See here for more details. Play will be eventually built upon the Akka streams and http modules. It's still marked as experimental and the process is still going. You can use spray in your project just adding the dependencies. There's no such thing as "latest version of Typesafe", unless you are speaking about the Typesafe Activator, which is the bundle of tools (including Play and Akka and some nice web interface) provided by Typesafe. Normally, what you need will be downloaded automatically. See the examples for more information.
Finally, hosting. What would people suggest for hosting such an API
with this type of framework? AWS, Google, Cloud Foundry, Heroku?
No idea. Until now I have been using AWS successfully, but since I have not tried other options, I can not give opinion on that.
Does anyone know of any good links that cover a lot of the above? i.e.
deploying a spray based API on Cloud Foundry for example?
For Cloud Foundry specifically, I don't know one.
Hope it helped!
P.S.: your question is too broad. Try in the future to present real concrete problems and your attempts to (unsuccessfully) solve it.
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I would like to create a website similar like imdb.com. Whether imdb.com uses any framework? if so which framework it uses? Otherwise are they developing on their own? Is it easy for a normal PHP developer to create my own php framework?
As a PHP developer:
I have my own php framework, So you can say it's not so hard; But you must first learn how other frameworks work... And decide what your framework need to do... Which design patters you agree with...
Most of big websites didn't use famous frameworks, Or even their own frameworks... Mostly using a plenty of libraries... Because when you use a framework you code faster but you waste resources as RAM, CPU IO/Disk...
A well programmed application is this one that use 100% of its code source, It's good to go OOP, MVC... But not in the way most of frameworks works... This what is life less working time cause a less quality project.
There are two reasons why you would want to create your own framework:
Learning purposes, it's a great learning opportunity because you
will learn a lot.
This one I highly doubt is a issue for you, but
If you believe your framework can be different and better in some
way than those already existing, go for it.
A framework isn't the application, a framework is a tool set that lets you get straight on the application itself, instead of writing a database abstraction layer you learn how built-in in works and writes the busniess logic your application needs.
Developing a new framework is not a trivial or easy work at all. Even for a team is difficult to handle, so be extremely sure you need to create yet another one before starting.
Instead, use open source, well known solutions, so that bugs are likely to be triaged and fixed. There are many which are available even for commercial use. Just choose your favourite one: Symfony, Code Igniter or Kohana or whatever and start building your application on top.
As of IMDB, probably they are using a framework, but there is no way to tell what if any.
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I am trying to get the TR-069/CWMP protocol up and running. I have found an open source ACS server called openACS. My problem is the CPE, there does not seem to be any open source CPE implementations around. I have found a few projects but none are alive. I was wondering if anyone knows about any full CPE implementation? Also, Does anyone know how much work would be involved in implementing the protocol myself?
Thank you.
I had implemented a generic stand alone CWMP client in pure C before 5-6 years. It was a project for my University (there is a publication for that http://ieeexplore.ieee.org/Xplore/login.jsp?url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F30%2F34592%2F01649657.pdf%3Farnumber%3D1649657&authDecision=-203)
Well, actually, if you read the paper you'll see that we propose there a methodology for creating (instantiating) CWMP clients through Java. You could use a java program to define the model of the CWMP client and create a configuration file which would be used by the generic CWMP client. After that you used some hooks to define what should be done on the Set or Get of each parameter of the model.
If I remember correctly, the CWMP client implemented most of the requirements of the TR-69 document and you could add its model (set and get parameters) easily without using the Java tools.
If you feel that it could help you and want to continue the CWMP client, I would gladly send to you (or upload somehere) the full source code. However I warn you - I don't remember anything about that project so I can't answer any questions !
Concerning the implementation time, it took me around 2-3 months. I had implemented my own HTTP server and SOAP parser / generator (using IXML for XML parsing). It wasn't anything fancy but it was working - it even supported SSL through OpenSSL !
Also, I've created a bitbucket repository containing the source code of the client: http://bitbucket.org/spapas/cwmpclient. I hope it's helpful - if it is, just add a reference to the original project
I recently developed GPLv2 TR-069 (cwmp) client called freecwmp. You can get it here:
http://www.freecwmp.org/
we developed a full complete open source called easycwmp. please visit http://www.easycwmp.org for more details and to download the source
It's not true that there is no actively developed CWMP client. freecwmp is under active development and it is GPLv2 licensed; it is already used in production. Main focus is on OpenWrt platform.
Also I have started doing server side ACS and CWMP proxy. More information can be found on the project web page: http://freeacs-ng.org/
The short answer is there are no fully implemented open source CPE implementations. There does not seem to be any open source implementations in progress either. Also, I believe there will be quite a lot of work involved in creating my own implementation.
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Which of these technology suite for Multi user online game project?
Project requirements:
Able to handle 2k-5k user at any given time.
client library for iphone and android (native, no javascript).
client library for Microsoft Windows (most important), also for mac os x and linux.
Good documentation specially for mod development
Project is not open-source. So, can only use libraries with suitable license.
I can program in erlang and java as well, programming language isn't an issue.
I was looking at following server technologies like Openfire, Tigase, ejabberd and RabbitMQ.
All are good for my project but I want to know more about what suite my needs, AMQP or XMPP.
What AMQP offer specially for real time online games. Is it better option then xmpp?
A key difference between XMPP and AMQP is binary content. AMQP handles binary data just fine, and XMPP seems more designed for XML. Personally for online games I use Google Protocol Buffers for message formatting and parsing, and with their very small binary footprint, I'd be more inclined to use AMQP to deliver those messages.
But do consider what AMQP server you want to use. I've been bitten by using RabbitMQ for my AMQP server in the past. RabbitMQ does not have any flow control facilities, at all. So if your clients are sending messages faster than your server can consume them, buffers on the server can fill up and blow the server up. More recent versions of RabbitMQ implement flow control in an exceedingly coarse way: they halt all consumers in the system until memory clears up.
I've never tried zeromq; perhaps it'd be better for the things I've been using RabbitMQ for...
5K users doesn't tell me much about their behaviour, but if they all submited one request within the same 10 second window then let's say you'd be looking in the 500-1000 requests per second.
I've had Active/MQ running on my relatively low-powered lap-top easily handling 300 requests per second and so I'd happily recommend it here. You can also set up clusters of brokers and achieve horizontal scalability. You can use an http protocol (STOMP) or its native binary protocol. Lots of client API libraries also for C/C++, Java, JavaScript and others. There is some initial AMQP support.
You didn't mention any persistence requirement, but again I would have thought that most RDBMSs would suffice. That said, some of the document oriented and big-table type databases look interesting from a horizontal scaling perspective.
I've also found Apache Camel highly performant and I strongly recommend it. Camel is used to implement your logic layer.
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If you have worked with DotNetNuke, what are advantages and disadvantages that you have come across? What are alternative Content Management Systems that you have used that you find are better or worst. I'm trying to get a feel of what Content Management System Frameworks people are using and the advantages and disadvantages of them.
Thanks,
XaiSoft
This post may help as it has covered some of this info!
DotNetNuke works well, and has a wide variety of addins that are available for purchase from various vendors. It is also open source which is nice, as it allows you to troubleshoot issues to a deeper level then if it was closed source.
We didn't spend a lot of time researching CMS systems but this past summer we couldn't find anything with the functionality of DotNetNuke which targets the .net framework. If your not tied to .net then there are a ton of options available.
DNN is very very dynamic in terms of functionality, features and security. There's is nothing like it. However there are a few drawbacks that i felt while using it.
The biggest drawback in my opinion is the response time of a DNN using sites. The code itself is very obsolete and you need to lock yourself and scour on each and every coding details before using DNN. One more is the URL dependency, if you need to change your domain name to another your old database will be of no use.
There are a lot of new promising CMS extension in Dot NET market and Sageframe, in my opinion, is the best of them. I have been using this extension for quite a time now and I am quite fascinated by its features though still in beta.
DotNetNuke is quite powerful. It's biggest advantage is the inline editing of site content, in my opinion. It's biggest disadvantage is that it is pretty resource intensive compared to other CMS systems.
Here's a comparison I wrote last month:
http://www.logicalvue.com/blog/2009/01/cms-shootout-dotnetnuke-vs-joomla-vs-wordpress/
The biggest disadvantage is the missing support for multiple languages.
Yes, you can install multiple languages but you can't write seperate content for each installed language...
It's not hard to write such a module yourself but the other problem is the URLs.
You can use the 'Human Friendly' option but yet again, this does not support multiple languages.
For instance /Products/tabid/57/language/en-US/Default.aspx becomes products.aspx but there isn't a possibility to include the language like this /en-US/products.aspx
I know there are 3th party tools like UrlMaster which covers this up but still I think this should be available in such a framework.
The biggest advantage is the ease of developing your own modules! If a functionality isn't available, you can write your own module without any problems!
.Net Nuke is not good for developing projects.
Microsoft is releasing lot of versiond and including lot of lauguages.
So how developers will learn all the things...
This is very bad for developers.....