I am a backend Rails developer of an API that services several iPhone clients. I'm not an iPhone dev.
I have a need to accept binary data (several image files in this case) from the client via a POST request to the API.
To get the file content (file metadata other than image type is not relevant here), what tools might be used by the iPhone developer? I've found ObjectiveResource (used by iPhone on Rails) and ASIHTTPRequest. In the pages I found for those, there's no indication of what form the uploaded file will have when the controller action is executed. Will it be a Ruby File object or Tempfile object? I don't control the iPhone code development, there are some cross-cultural communication difficulties there, and they haven't used those suggestions so far. If I can submit better information to them, I might be getting better data back.
The backend app is currently running Rails 2.3.10, and will soon (in the next few weeks) likely be converted into Rails 3.
Thanks,
Craig
ObjectiveResource does not natively support file uploads. Try instead using ASIHTTPRequest with this snippet:
NSURL *url = [NSURL URLWithString:#"http://localhost:3000/file"];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request setPostValue:#"Sample" forKey:#"name"];
[request setFile:... forKey:#"file"];
[request startSynchronous];
For more details, see the example page here (sending data).
The post will be encoded as a standard multipart form post (just like if it came from an HTML form). If you are using paperclip to store your uploads, the magic will just happen!
Use JSON over HTTP
NSMutableURLRequest *request =
[[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString:urlStr]];
[request setHTTPMethod: #"POST"];
[request setValue:#"application/json; charset=utf-8" forHTTPHeaderField:#"Content-Type"];
NSString* requestDataLengthString = [[NSString alloc] initWithFormat:#"%d", [jsonMessageStr length]];
[request setValue:requestDataLengthString forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setHTTPBody:jsonData];
NSURLConnection *theConnection =
[[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];
Related
I have develop a web service which provides the hospital names of a particular state inside a iphone application. In my application there are different states in table view. When a user select a particular state, I need to send the that particular state name to the web service so that it can display the hospitals belongs to that particular state. How can I achieve this???Please Help me. I stuck here for long time.....thanks in advance....
That all depends on your webservice. If you are using a RESTful webservice you could do something like http://mysite.com?state=NewYork and the webservice can pull the state parameter and find that the user is looking for New York.
If you are using a SOAP webservice you would have to follow the schema defined in the webservice's WSDL.
Edit 1:
In either case:
In the iOS app you can determine which table row was selected by making your class implememnt UITableViewDelegate and implementing tableView:didSelectRowAtIndexPath: (Documentation Here) At this point you can determine which state you are looking for and add that value to the service call.
Edit 2:
NSMutableURLRequest *request = [[NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"http://www.yoursite/webService"]] retain];
NSString *bodyLength = [NSString stringWithFormat:#"%d", [bodyString length]];
[request addValue:#"text/xml; charset=utf-8" forHTTPHeaderField:#"Content-Type"];
[request addValue:bodyLength forHTTPHeaderField:#"Content-Length"];
[request setHTTPMethod:#"POST"];
[request setHTTPBody:[bodyString dataUsingEncoding:NSUTF8StringEncoding]];
NSURLConnection *myConnection = [NSURLConnection connectionWithRequest:request delegate:self];
[myConnection start];
I am developing view based application.In my view i have register page in that page i have
some fields like Firstname, lastname,e mail ID. When we click save button after entering the values these all field should be store in in webserver.In webserver i have application that application was developed using .net MVC Architecture and database is MYSQL .How i can store these values in webserver.
thanks for your response i have written this code is it right way to store values in webserver
-(IBAction)buttonClick:(id)sender
{
NSString* firstname = nameInput.text;
NSString* lastname = passInput.text;
NSString* bname = lastInput.text;
NSString *post =
[[NSString alloc] initWithFormat:#"fname=%#&lname=%#&email=%#",firstname,lastname,bname];
NSData * postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:NO];
NSString * postLength = [NSString stringWithFormat:#"%d",[postData length]];
NSMutableURLRequest * request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:#"http://www.yoursite.com/file.php?%#",post]]];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData];
NSURLConnection * conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
if (conn) NSLog(#"Connection Successful");
}
#end
You have two options:
1) Develop a proper API that your iOS app can call using libraries like ASIHTTPRequest or AFNetworking
2) Have a .NET form processor in place, just like you would to process an HTML form, and then use ASIHTTPRequest, AFNetworking, or something similar to submit the request to this processor using the POST method and with the parameters you would like to store added to the request. This simulates an HTML form that has been filled and submitted, and then you can do whatever you wish with the data .NET receives. Both ASI and AFNetworking have pretty extensive documentation on how these types of requests are implemented on iOS with their respective libraries. Unfortunately, ASI is no longer being maintained, so I would recommend going with AFNetworking if possible.
RESPONSE TO UPDATE:
I only gave it a quick look over, but everything looks good to me. The only thing I would change is this:
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:#"http://www.yoursite.com/file.php?%#",post]]];
to this:
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:#"http://www.yoursite.com/file.php"]]];
What you will need now is code on the web side in that file.php that can process the request. It would use the typical $_POST['var_name_here'] to grab the data that is passed to it.
You have to implement a webapplication in your preferred language and deploy it to some webserver or hosting service. To get started, you should choose a language PHP, Java, Python, C# or whatever and google how you could implement a webservice within that language.
I would do this in Java and implement a RESTful wbeservice that sends and receives JSON or XML.
I'm sure this isn't too difficult (and I'm surprised I can't figure it out), but here goes:
So. I'm using gzcompress() to compress JSON data in PHP so I can send it into an iPhone app.
Having some troubles figuring out how to uncompress this data on the iPhone (iOS).
Any thoughts? I'm grabbing the data via a NSMutableURLRequest.
Thanks!
Code making the request:
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:theURL]];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
Code processing the response:
NSString *responseString = [[[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding] autorelease];
And on the PHP side:
echo(gzcompress(json_encode($lines)));
Thanks!!!
This article suggests that NSMutableURLRequest supports gzip decompression out-of-the-box, but you need to add an Accept-Encoding: gzip header to the request.
Extending your example:
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:theURL]];
[request setValue:#"gzip" forHTTPHeaderField:#"Accept-Encoding"];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
I'd also recommend testing the PHP script with cURL to make sure it's sending valid gzipped data.
How to use post manner to transmit username and password in order to log in a website on iphone or ipad platform?
Some one has suggest me that use ASIHTTPRequest,but I don't know how to use it．
Can somebody help me ?Thank you ........
ASIHTTPRequest has one of the best how to use pages of any library I have ever encountered. It is located here: http://allseeing-i.com/ASIHTTPRequest/How-to-use
If you need to post to a web form you could do something like this:
#define kURLString #"https://yourwebsite.com"
NSURL *url = [NSURL urlWithString:kURLString];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request setPostValue:#"myname" forKey:#"username"];
[request setPostValue:#"l33td00d" forKey:#"password"];
[request setDelegate:self];
[request startSynchronous];
Although in real life you may wish to run the request asynchronous. The details on how to do that are on the page I linked. It is defiantly worth reading.
I'm trying to make a log in or sign up feature for my web site in my iPhone app. My website is a content management system, and like any other CMS, it has log in and registration features. It also has permmissions, dependent on the user account. I think I would have to use UIWebView for this.
Are there any examples or tutorials I can examine?
Check out the documentation for NSURLRequest (and NSMutableURLRequest): you can use it to make a POST request to your login and registration pages, just like a web browser. You can write the form UI in Cocoa/Objective-C and then send the data to the server.
As far as displaying the result to the user, you'll have to figure out a way to either parse the returned HTML (bad idea) or modify your CMS to return JSON or XML to iPhone requests (better idea).
Edit: Here's some sample code, taken from an app I'm working on (it submits data to Last.fm using POST):
NSURL *url = [NSURL URLWithString:#"http://example.com/"];
NSString *str = #"This is my example data!";
// everything below here is directly from my app:
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:#"POST"];
[request setHTTPBody:[str dataUsingEncoding:NSUTF8StringEncoding]];
[request setValue:kLastFMClientUserAgent forHTTPHeaderField:#"User-Agent"];
[request setCachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData];
[request setHTTPShouldHandleCookies:NO];
*connection = [[NSURLConnection alloc] initWithRequest:request
delegate:self
startImmediately:YES];