I am trying to download a file from a server to an iphone like this
NSURL *newURL0 = [NSURL URLWithString: url];
NSMutableURLRequest *req0 = [NSMutableURLRequest requestWithURL:newURL0];
NSURLConnection conn = [[NSURLConnection alloc] initWithRequest:req0 delegate:self];
and then
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSURL *docDirectory = [[[NSFileManager defaultManager] URLsForDirectory:
NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
NSURL *filePath = [docDirectory URLByAppendingPathComponent:temp];
[webData writeToURL:filePath atomically:YES];
[webData release];
connection = nil ;
if ([delegate respondsToSelector:#selector(getDataSucceeded:)]) {
NSLog(#"Log: %#", #"yes");
[delegate getDataSucceeded:self.list];
}
}
This always worked perfectly, but recently I have noticed that it does not work anymore. No changes were made to any files relevant to this function, it just kind of stopped working. when I use the same url in a web browser the file downloads fine, but in my app when I request the file it just returns 5 bytes, the word 'False' which I also found strange because the server does not return the word False, if there is an issue it returns a error message. The server side code is written in Visual Basic.
Any thoughts or suggestions are much appreciated
False is a keyword in Visual Basic, it is not a keyword in Objective-C. There's also no reason for that to appear as text in a response like that. It's almost certainly being generated server-side.
Use an HTTP proxy such as Charles to see what requests are made by your web browser and by your application. There will be a difference between them that is causing the server to respond in a different way. Use a tool like cURL to make requests manually to determine which of the differences is the cause. Alternatively, check the commit log for your server-side code for recent changes that could cause this.
i think you missed the following call back function in which you need to append the chunck of data in a single NSData object :
in my case _responseText is a NSData object
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[_responseText appendData:data];
}
Hope this will help you out
Related
I'm trying to implement Like via the facebook open-graph-api with the Facebook iOS SDK 3.0.
Everything seems to work except the FbGraphObject and that's because I have no idea how it should look because this clearly does not work.
What I'm trying to do is to like a url posted as an object. A simple Like with via the open-graph.
The error message I get the the code below is:
The action you're trying to publish is invalid because it does not specify any
reference objects. At least one of the following properties must be specified: object.
The code I use is this:
FBGraphObject *objectToLike = [[FBGraphObject alloc]initWithContentsOfURL:[NSURL URLWithString:facebookLike.titleLabel.text]];
FBRequest *requestLike = [[FBRequest alloc]initForPostWithSession:[FBSession activeSession] graphPath:#"me/og.likes" graphObject:objectToLike];
FBRequestConnection *connection = [[FBRequestConnection alloc] init];
[connection addRequest:requestLike
completionHandler:
^(FBRequestConnection *connection, id result, NSError *error) {
if (!error &&
result) {
DLog(#"NothingWentWrong");
}
DLog(#"MajorError: %#", error);
}
];
[connection start];
UPDATE:
Checked some more info and my guess it to use this method:
https://developers.facebook.com/docs/sdk-reference/iossdk/3.0/class/FBGraphObject/#//api/name/graphObject
To somehow create an object. It's the graphObject method that I probably need to do something with. Any help at all would be appreciated.
I've actually manage to create a simple and quite dirty solution of this.
The solution does not seem optimal but it's currently a working solution.
If anybody has used the explorer tool on facebook on this url:
https://developers.facebook.com/tools/explorer/
You know how the URL will look like when facebook is sharing a like. It has to have the URL and an access-token.
So my solution became just to disregard sending anything from the Facebook SDK and just send a post request to the same URL that I've used in the explorer tool.
There seems to be some referencing to it on the facebooks docs if you look closely and deep, but no one explains exactly how to actually make the connection, so this is my solution:
NSString *urlToLikeFor = facebookLike.titleLabel.text;
NSString *theWholeUrl = [NSString stringWithFormat:#"https://graph.facebook.com/me/og.likes?object=%#&access_token=%#", urlToLikeFor, FBSession.activeSession.accessToken];
NSLog(#"TheWholeUrl: %#", theWholeUrl);
NSURL *facebookUrl = [NSURL URLWithString:theWholeUrl];
NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:facebookUrl];
[req setHTTPMethod:#"POST"];
NSURLResponse *response;
NSError *err;
NSData *responseData = [NSURLConnection sendSynchronousRequest:req returningResponse:&response error:&err];
NSString *content = [NSString stringWithUTF8String:[responseData bytes]];
NSLog(#"responseData: %#", content);
If you look at the code I just take the url and puts two dynamic strings in the url, one with the object-url and one with the access token. I create a URLRequest and make it a POST request, and the response from facebook gets logged so one actually can see if the like go through or not.
There might be some performance improvements that can be done with the actual requests but I will leave it up to you if you see any slowdowns.
I'm still interested in other solutions but this is the one I will use for now.
We don't currently support Like through our Graph API.
What you can look through is something like this :
https://developers.facebook.com/docs/opengraph/actions/builtin/likes/
I’m not sure what initWithContentsOfURL does, but from the name I guess it tries to actually load content from a given URL(?).
You only have to give the URL as a text parameter – a URL is what represents an Open Graph object. Facebook will do the rest, scraping the page behind that URL and reading it’s OG meta tags, etc.
Maybe just this?
FBRequest *requestLike = [[FBRequest alloc]initForPostWithSession:[FBSession activeSession]
graphPath:#"me/og.likes"
graphObject:[NSURL URLWithString:facebookLike.titleLabel.text]];
I'm working on making a client for my REST service on the iPhone. I'm a little lost as to how I go about making the GET and POST requests. I make the url from a NSString, convert it to an NSURL and create the NSURLRequest based off of the url. After that I'm pretty lost. Also, sometimes I care about the response, other times I don't. For example, when making a request for a new id, I care about the response because it's the id I'll use to upload my file later, but when I upload the file I don't care because the server doesn't send a response.
Does anyone have some (hopefully)simple sample code that they could point me to / share?
What I have so far:
-(NSString *) makeGetRequest:(NSString *)url :(Boolean)careAboutResult
{
NSString *results = nil;
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
NSError *reqError;
NSURLResponse *response = nil;
if(careAboutResult == YES)
{
//get the result
}
return results;
}
In the code I'm testing with, the URL is
http://192.168.0.108:8081/TestUploadService/RestfulUpload.svc/id/test123_DOT_png
and I'm saying I do care about the result.
Any help would be greatly appreciated.
#nick its good you have created a NSURLRequest now you just need to create a connection to send this request and receive response, this request is GET request.
To make POST request you will need to use NSMutableURLRequest and set its method name and body content. Here in documentation you will find how you can do this.
I need a little help here!!!
If string 'url' contains the address to web server, how do i check whether my web server is up or down?
I got some codes to check Internet connectivity. But even if we have internet connectivity how do we know server is up or not? Is there any better way to do that?
Thank You
You could do a request,
NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:url]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:20.0];
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest
delegate:self];
Now if you implement (along with all other delegate methods)
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
you will get either succes or error.
Post a request, get the response. If you get a response, the server is up, if not its down..
I am trying to download a xyz.config file which is created using iPhone Configuration utlity, via code.
NSString *urlString = #"http://xxxxx:xxx/ms/servlet/ConfigServer?userid=xxx&pwd=xxx&emailid=xxxxx";
NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:urlString]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if (theConnection) {
receivedData = [[NSMutableData data] retain];
} else {
// Inform the user that the connection failed.
}
Then, didReceiveData, didReceiveResponse are written. Finally,
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(#"Succeeded! Received %d bytes of data",[receivedData length]);
NSString *responseString = [[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding];
NSLog(#"Response : %#", responseString );
// release the connection, and the data object
[receivedData release];
[connection release];
}
With the above code, i'm getting response as string of the complete configuration file. But my Aim to download this file as raw data, which will automatically launch device profile to ask for installing this profile.
NOTE: I am able to provide the same URL in Safari browser on the device, and download the
raw file directly to install it on the device. I don't want to use Safari browser to download it, it should be done via my communication code.
I also tried with ASIHTTPRequest like below, but unable to download that file directly from the URL via this code as well.
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
[request setRequestMethod:#"GET"];
[request startSynchronous];
Please help!
Thank you.
The Mobile Safari browser app on the iOS has a lot more freedom than your app. Case in point, on the latest iOS 4.3, Mobile Safari has the Nitro JavaScript engine which boost 2x performance increase. But the UIWebView which is available to your app doesn't have that engine. Your app is in a sandbox, therefore, you cannot write outside of that box.
If the iOS SDK doesn't have functionality for this, then what if I have a basic (static) website, and somewhere on that website I manually set a piece of data that specifies the latest version of my app in the app store every time I release an update? How can I make my app query the website for that version data and check it against the version running on the iOS device?
You are on the right track. You need to make an HTTP request to your static version web page. To do this you can use an NSURLConnection object. So something like:
NSURL * url = [NSURL URLWithString:#"http://yourweb.com/version.txt"];
NSURLRequest * request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReturnCacheDataElseLoad timeoutInterval:60];
_connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
Then in your delegate implementation:
(void)connection:(NSURLConnection*)connection didReceiveResponse:(NSHTTPURLResponse*)response
{
if(response.statusCode != 200)
// you got an error
}
- (void)connection:(NSURLConnection*)connection didFailWithError:(NSError*)error
{
// again with the errors ...
}
// you got some data ... append it to your chunk
// in your case all the data should come back in one callback
- (void)connection:(NSURLConnection*)connection didReceiveData:(NSData*)data
{
[mData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
// your request finished ... check the version here
}
So in your connectionDidFinishLoading you have a look at mData that you have collected. Parse out the version number and compare it to your bundle version number:
[self infoValueForKey:#"CFBundleVersion"];
You can make a query like http://itunes.apple.com/en/lookup?bundleId=com.easi6.doorsndots to AppStore.
Returning JSON has an version information (currently on AppStore) which can be compared the other in bundle.
I had used the same solution #RedBlueThing recommended in many of my apps. I have scaled it to a service that other app developers can use at CleverStork - an Update Manager for Apps. Hope you guys like it :)