I need great video tutorial for using webservices in iphone objective c.My requirment is already values are in webservice, so just i want to access the webservice and validate username and password and return back to true or false get value display on the iphone.
If anybody have idea about tutorial please help me out..
The by far easiest way to consume a web service on an iPhone is to use Hessian. Implement the server in Java using the official Hessian distribution, or in .NET using HessianC#.
Let us assume you have defined the following interface for your web service, and implemented it as a HessianServlet (Just replace a HttpServlet):
public interface MyService {
public String doWithStuff(String action, Object stuff);
}
It is just as easy on .NET.
On the client side use HessianKit, where you create proxies to the web service, and then use them just as if they where local object. First you must conbert the Java interface above to an Objective-C protocol.
#protocol MySertvice
-(NSString)do:(NSString*)action withStuff:(id)stuff;
#end
Then use it as a proxy, just as if it was a local object:
id<MyService> proxy = [CWHessianConnection proxyWithURL:serviceURL
protocol:#protocol(MyService)];
NSLog(#"%#", [proxy do:#"Something" withStuff:arguments]);
Hessian in a binary web service protocol, meaning allot smaller payloads, which is good on a slow GSM connection. Hessian is also much easier to encode and decode, compared to XML and JSON, meaning your app can make calls and receive responses using less CPU, and memory for temporary objects.
iPhone on Rails is
an Objective-C port of Ruby on Rails'
ActiveResource.
but it can be used as a wrapper to access any RESTful webservice. ObjC classes and objects correspond to ActiveRecord classes and objects (which correspond to data base tables and rows).
There's an introductory screencast over here.
Related
I am trying to create a app which uses a webservice to store and to retrieve data. We are using a Ruby On Rails webservice. We're not able to use post Method to store data on Ruby On rails Webservice. Does anybody have an idea on how to send request to save data to the server. How to access ruby on rails web service????? Any help will be appreciated!!!!!!
You can choose either rc-tool or RestClient
Since RoR is Rest conform you can use RestKit to get/post your data.
RestKit is a Cocoa framework for interacting with RESTful web services in Objective C on iOS and Mac OS X. It provides a set of primitives for interacting with web services wrapping GET, POST, PUT and DELETE HTTP verbs behind a clean, simple interface. RestKit also provides a system for modeling remote resources by mapping them from JSON (or XML) payloads back into local domain objects. Object mapping functions with normal NSObject derived classes with properties. There is also an object mapping implementation included that provides a Core Data backed store for persisting objects loaded from the web.
I'm not sure this question is appropriate here but I hope I could get some help. What i'm looking to do is basically to make a server based iPhone application. I've got an ubuntu server ready to be used. I'm thinking of making a web service which my application then can use but I have virtually no experience in this field so i'm looking for some help to get pointed into the right direction, what language to write the web service in etc. It isn't required to be a web service but anything that make's the iPhone app depending on the server.
This little mission is simply for learning experience.
Probably PHP is what you will use to write the webservice. REST based services are the most popular, but it could be as simple as a form POST passing in parameters. The PHP script (no matter which way you write it), will then pass those parameters and any other needed info to a server method that either executes a SQL query (preferably using a stored procedure) or uses some other server resource. That data would then be output via the webservice as either XML or JSON (I personally like JSON better).
Check out Ray Wenderlich's tutorial on just this kind of thing:
When it comes time to handle the request in iOS, my personal choice is AFNetworking. It uses blocks instead of delegate methods and is blazing fast. I can hook you up with examples if needed.
Ok, First you need to learn how to write web services in PHP. Which will return you response in XML format. I personally prefer .PLIST format because it gets easier to parse on the iOS.
Once your web services are up and running. You need to use NSURLConnection and NSURLRequest to talk to your web services. Implementing the NSURLConnection Delegate methods correctly, you can download your XML response, maybe save it in a file on your Documents Directory.
Then once done downloading start parsing that response using NSXMLParser. implementing the delegates and what not, you can create your data structure the way you feel comfortable with manipulating it and store the parsed results in them and populate your View accordingly.
Is there a general Cocoa or Cocoa Touch library for interacting with any web service API, or one which can be used as a basis for creating my own library for a web service? For example, I could add some details about how to interact with the Vimeo API (how to verify user details, what URLs to call). I'm not sure how this would work in reality.
If not, can anyone suggest an web service library which I could alter to change the API calls? It would need to be fairly simple (a small API) and easy to adapt. An example is this Cocoa library for Twitter (although it would probably be too complicated to adapt). Would it be easier just to code it up from scratch?
I don't think there is a library that will automagically work with any web API. In fact I don't even think it's possible to write such a library, since you can define your web API any way you want to. That library would have to be pretty smart in order to figure out how to use an arbitrary API.
I think the closest you'll get is something like ASIHTTPRequest, which is a great library for interacting with web services. If you add a JSON and/or XML parser you'll have everything you need to interact with almost any web API.
Found another library for interacting with RESTful web services. It's called RestKit. From their description:
RestKit is a Cocoa framework for interacting with RESTful web services in Objective C on iOS and Mac OS X. It provides a set of primitives for interacting with web services wrapping GET, POST, PUT and DELETE HTTP verbs behind a clean, simple interface. RestKit also provides a system for modeling remote resources by mapping them from JSON (or XML) payloads back into local domain objects. Object mapping functions with normal NSObject derived classes with properties. There is also an object mapping implementation included that provides a Core Data backed store for persisting objects loaded from the web.
I have an application in which I have to hit many web services in same class and from another classes also and I have to parse the data each time.I cant write the delegate methods for webservice hit and XML Parse everytime as its not a good programming practice. So I thought of maintaining common classes for 'webserviceHandler' and 'XMLParsingHandler' in which I will write delegate methods for web service and XMLParsing respectively.
Now the problem is how to make it happen to call these delegates each and everytime I hit the webservice from another classes..??
Code for this is more appreciable..
Thanks in advance..
Cocoa Programming for Mac OS X Chapter 28. Web Services using NSXMLDocument
There is also an example from ADC SeismicXML using NSXMLParser
We have an iPhone application created by an external consultancy that we're planning to add card payment facilities to in a subsequent release.
We plan to host a service ourselves in order to process the payment stuff, with SSL encryption. We have in-house expertese for all of this apart from the (contracted out) iPhone bit.
Are there any specific gotchas that we should be aware of that concern designing web services for iPhones?
We'll be writing the web service in C# 3.5.
JSON data format is better to be converted into NSArray or NSDictionary objects. It's easier and faster to be parsed.
So, specifically for the iPhone, it's a lot better to consume JSON data. Unless if there's some technical complexity that JSON is unable to handle.
Check YAJL:
http://github.com/lloyd/yajl
There are Objective-C wrapper/implementations by gabriel in github and by MGTwitterEngine.
TouchJSON is another code that's simpler than yajl. You can convert JSON string into NSDictionary or NSArray object in 2 lines of code. But, it maybe slower.
I'm not sure there are really any special considerations. The iPhone should be able to communicate with most types of webservice.
I worked on an iPhone app that communicated to a RESTful webservice written in Java.
I imagine it's pretty straightforward across the board - there are plenty of libraries for parsing/generating XML or JSON formatted messages, the iPhone can handle HTTP authentication, HTTPS, caching, etc.
It's just down to your iPhone developer to get it right :)
For SOAP based web services I strongly suggest that you try gSOAP. This library does not support Objective-C, however it supports C and C++ and is certainly the most complete open source project to access SOAP based web service; it also outperforms all of the other libraries.
For Objective-C you may want to try wsdl2objc, but I am not sure if it provides support for SSL/TLS (gSOAP does).
Finally, REST based web services are easily handled using ASIHTTPRequest.