iComet for iOS App

iComet for iOS App

Download libcurl for iOS

http://seiryu.home.comcast.net/~seiryu/libcurl-ios.html

Then add libcurl.a and header files into your project, add the built-in libz.dylib framework from xcode as well.

The demo source code

#include "curl/curl.h"

@interface ViewController (){
	CURL *_curl;
}
@end

// this function is called in a separated thread, it gets called when receive msg from icomet server
size_t icomet_callback(char *ptr, size_t size, size_t nmemb, void *userdata){
	const size_t sizeInBytes = size*nmemb;
	NSData *data = [[NSData alloc] initWithBytes:ptr length:sizeInBytes];
	NSString* s = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
	NSLog(@"%@", s);

	ViewController *controller = (__bridge ViewController *)userdata;
	dispatch_async(dispatch_get_main_queue(), ^{
		// UI things
	});
	
	return sizeInBytes;
}

@implementation ViewController

- (void)viewDidLoad {
	[self performSelectorInBackground:@selector(startStreaming) withObject:nil];
}

- (void)startStreaming{
	_curl = curl_easy_init();
	curl_easy_setopt(_curl, CURLOPT_URL, "http://127.0.0.1:8100/stream?cname=a&seq=1");
	curl_easy_setopt(_curl, CURLOPT_NOSIGNAL, 1L);	// try not to use signals
	curl_easy_setopt(_curl, CURLOPT_USERAGENT, curl_version());	// set a default user agent
	curl_easy_setopt(_curl, CURLOPT_WRITEFUNCTION, icomet_callback);
	curl_easy_setopt(_curl, CURLOPT_WRITEDATA, self);
	curl_easy_perform(_curl);
	curl_easy_cleanup(_curl);
}

Do not use NSURLConnection!

NSURLConnectionDelegate will buffer chunked data, so this will not work:

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data;