When making the following HTTP POST request:
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:#"POST"];
NSURLResponse *urlResponse = nil;
NSError *error = nil;
// execute
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error];
if(responseData)
{
//blah
}
I get back a valid response when connected via WiFi, but not when connected over 3G. The responseData object doesn't even get made (0x0) when coming back over 3G.
I get kCFErrorDomainCFNetwork error 303.
The response ought to be 242k of JSON.
Any help would be greatly appreciated.
Thanks.
It seemed that the problem was between the back end system and the mobile networks. Changing the header information to text format only solved the issue.
Related
I am using the following code to get the news feed from facebook-
NSString *urlStringFacebook = [NSString stringWithFormat:#"https://graph.facebook.com/v2.2/me/home?format=json&&access_token=%#&&limit=90",[[FBSession activeSession] accessTokenData]];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:[urlStringFacebook stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];
[request setHTTPMethod:#"GET"];
NSHTTPURLResponse *response;
NSError *error;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
I have tried with different limit and different FB version.
Sometimes I get 3-4 feeds sometimes zero. It is happening only from 2 days before that I was getting news feeds.
Please help me.
Thanks
This seems to be a bug.
File a report at https://developers.facebook.com/bugs
Yes, this is a facebook bug. I reported here-
https://developers.facebook.com/bugs/449167695235902
I tried a lot of things but somehow not able to figure the basics of an HTTP POST request in ios. Sometimes I get a server error other times I get status code 200 but an empty response. The backend server code works and it is sending json data in response. Somehow my ios app is not able to get that response. Any help will be appreciated!
This is one of the things I tried! GetAuthorOfBook corresponds to a php server function that accepts strBookName as a POST argument and returns the name of author as a json object!
NSURL *url = [NSURL URLWithString:#"http://mysite.com/getAuthorOfBook"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
NSString *post = [NSString stringWithFormat:#"strBookName=Rework"];
NSData *postData = [post dataUsingEncoding:NSUTF8StringEncoding];
NSString *postLength = [NSString stringWithFormat:#"%d",[postData length]];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"gzip" forHTTPHeaderField:#"Accept-Encoding"];
[request setValue:#"text/html" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData ];
//get response
NSHTTPURLResponse* urlResponse = nil;
NSError *error = [[NSError alloc] init];
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
The responseData should have the name of the author(strAuthorName) as a json "key":"value" pair.
The responseData isn't a json object yet. First you need to serialise it and assign it to an NSDictionary, then you can parse it by key.
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
Now you should be able to access authorName by either this method (if it is just a string in the json):
NSString *authorName = [json objectForKey:#"strAuthorName"];
or like this if it is a dictionary of objects (an array of objects in the json)
NSDictionary *authorName = [json objectForKey:#"strAuthorName"];
I am passing base64 encoded image string to the server side with the HTTP PUT method.I have tried several times but getting error message as response. That error message is because null value is getting in the server side. I have checked the same, in android code and its working fine there. I am attaching my code below.
SBJSON *parser = [[SBJSON alloc] init];
NSString *url=[NSString stringWithFormat:#"The URL i am using"] ;
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"XXXXX" forHTTPHeaderField:#"USER_AGENT"];
[request setHTTPMethod:#"PUT"];
NSString *input=[NSString stringWithFormat:#"abc[image]=%#",base64encodedString];
[request setHTTPBody:[input dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES]];
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *json_string = [[NSString alloc] initWithData:response encoding:NSASCIIStringEncoding];
NSDictionary *statuses = [parser objectWithString:json_string error:nil];
[parser release];
[json_string release];
return statuses;
I am getting error message from the server side like this: "xxxxxx.jpg is not recognized by the 'identify' command."
Kindly suggest a solution.
At last i found that the content type should be changed to "multipart/form-data" from "application/x-www-form-urlencoded". Can anyone please tell me how pass Base encoded string using this way? Pls...i am behind this issue for the last 20 days...
There could be a difference in the Base64 routine. Base64 encode the same data on the server and the iPhone and compare.
Using the simulator use a network snooper such as Wireshark on the Mac to see what is really going out and the full return from the server. If you are using SSL you can use the Mac app Charles to see the data.
I have application in which data are downloaded using wifi or 3G mostly...
Sometimes wifi goes down and unable to download data from server.
I have function of checking if internet available by
- (BOOL) connectedToNetwork
{
NSString *requestString =#"";
NSData *requestData = [NSData dataWithBytes: [requestString UTF8String] length: [requestString length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString:#"http://www.google.com"]];
[request setHTTPMethod: #"POST"];
[request setTimeoutInterval:10];
[request setHTTPBody: requestData];
return [ NSURLConnection sendSynchronousRequest: request returningResponse: nil error: nil ]!=nil;
}
and i got return TRUE sometimes though low connection..
How to solve this issue?
Your suggestions are very helpful to me.
Thanks in advance
for my application I use Reachability class from this Apple example. hope it helps )
http://developer.apple.com/library/ios/#samplecode/Reachability/Introduction/Intro.html
I would also recommend ASIHTTPRequest, which can help a lot with data downloading.
you must look into apple Reachability API's
Blog tutorial :
http://www.raddonline.com/blogs/geek-journal/iphone-sdk-testing-network-reachability/
http://www.xprogress.com/post-40-iphone-internet-connection-check-wifi-3g-edge-something-like-reachability-h/
I am working on an iPhone project which need to connect to the IIS server over HTTPS or SSL protocol. Can anyone tell me how to implement HTTPS connection in iPhone? Any advice would be appreciate.
Thank you in advance.
Ben Copsey's ASIHTTPRequest framework makes it trivially easy to issue web requests over SSL.
Modifying the site's example slightly:
NSURL *url = [NSURL URLWithString:#"https://allseeing-i.com"];
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
[request startSynchronous];
NSError *error = [request error];
if (!error) {
NSString *response = [request responseString];
NSLog (#"%#", response);
}
Just use NSURLConnection with an NSURLRequest pointing to an NUSUL with https protocol, just like that:
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:#"https://mySecureServer.net"]];
NSURLResponse *response = nil;
NSError *error = nil;
NSData *result = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
if (!error) {
//do something with response & data
}
But I suggest you have a look at the documentation of the URL loading system in Cocoa.
Jason don't forget to implement the connection:canAuthenticateAgainsProtectionSpace and connection:didReceiveAuthenticationChallenge to make sure you're handling the challenges for the Server authentication and Client Authentication:
check out this post that will help you with this https://devforums.apple.com/message/143091#143091
You probably don't have a public certificate. Can you access the https resource with firefox/safari/chrome without an error? if not - that's the problem, not your code.