CODEWITHSUNDEEP
iphoneobjective-cioscocoa-touchipad
gbaor
gbaor

Reputation: 1427

http GET on iOs

Im trying to get answer (an image) from a service on a PC with a HTTP GET request. If I put the request into a webbrowser, I get the requested image. If I try to get it in iPhone app, it doesnt work.

the request is: 

http://192.168.151.82:54000/snapshot?s=<snapshotrequest xmlns=\"http://www.vizrt.com/snapshotrequest\"><videomoderequest><width>880</width><height>495</height></videomoderequest><snapshotdata view=\"all\"/></snapshotrequest>&p=http://192.168.151.82:8580/element_collection/storage/shows/%%257B3646FFAC-4E77-41AB-BDFC-F581D157ABA3%%257D/elements/1000/

my code for getting is:

NSString *str = [NSString stringWithFormat: @"http://192.168.151.82:54000/snapshot?s=<snapshotrequest xmlns=\"http://www.vizrt.com/snapshotrequest\"><videomoderequest><width>880</width><height>495</height></videomoderequest><snapshotdata view=\"all\"/></snapshotrequest>&p=http://192.168.151.82:8580/element_collection/storage/shows/%%257B3646FFAC-4E77-41AB-BDFC-F581D157ABA3%%257D/elements/1000/"];
NSURL *url = [[NSURL alloc] initWithString:str];
UIImage *img = [ [ UIImage alloc ] initWithData: [ NSData dataWithContentsOfURL: url ] ];

You can see, that speciel characters like quotes and percentes are handeled. Im watching network communication on the PC with wireshark and there isn't any communication.

Upvotes: 0

Views: 1687

Answers (1)

Saurabh
Saurabh

Reputation: 22873

You need to url encode your parameters before creating a url from them 

NSString * unencodeParameter = @"<snapshotrequest xmlns=\"http://www.vizrt.com/snapshotrequest\"><videomoderequest><width>880</width><height>495</height></videomoderequest><snapshotdata view=\"all\"/></snapshotrequest>&p=http://192.168.151.82:8580/element_collection/storage/shows/%%257B3646FFAC-4E77-41AB-BDFC-F581D157ABA3%%257D/elements/1000/";

NSString * encodedParameter = (NSString *)CFURLCreateStringByAddingPercentEscapes(
            NULL,
            (CFStringRef)unencodedParameter,
            NULL,
            (CFStringRef)@"!*'();:@&=+$,/?%#[]",
            kCFStringEncodingUTF8 );

NSString *str = [NSString stringWithFormat: @"http://192.168.151.82:54000/snapshot?s=%@",encodedParameter];
NSURL *url = [[NSURL alloc] initWithString:str];
UIImage *img = [ [ UIImage alloc ] initWithData: [ NSData dataWithContentsOfURL: url ] ];

And also make sure your iPhone is on same wifi as your computer as you are using local IP address

Upvotes: 1

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