Objective-C で簡単に HTTP 通信を取り扱うことができるようにするクラス

HttpConnectionWrapper.h

//
//  HttpConnectionWrapper.h
//
//  Created by Hiroki Yagita on 11/04/09.
//  Copyright 2011 Hiroki Yagita. All rights reserved.
//

/*! @file */

#import <Foundation/Foundation.h>

@class HttpConnectionWrapper;


/*!
	HttpConnectionWrapper クラスのユーザーがリクエストの結果を受け取りたい時に実装してください。
 */
@protocol HttpConnectionWrapperDelegate

-(void)didReceiveAllResponse:(HttpConnectionWrapper *)connection withString:(NSString *)string;

@end

/*!
	HTTP 通信を簡単に扱えるようにするためのラッパークラスです。
 
	@see HttpConnectionWrapperDelegate
 */
@interface HttpConnectionWrapper : NSObject {
	NSMutableString *payload;
	id<HttpConnectionWrapperDelegate> delegate;
}
@property (nonatomic, retain) NSMutableString *payload;
@property (nonatomic, assign) id<HttpConnectionWrapperDelegate> delegate;

/*!
	HTTP 通信を開始します。結果を受け取る場合は HttpConnectionWrapperDelegate デリゲートを実装してください。
 
	@param	urlStr	URL文字列を指定してください。
	@see HttpConnectionWrapperDelegate
 */
-(void)startWithString:(NSString *)urlStr;

@end

HttpConnectionWrapper.m

//
//  HttpConnectionWrapper.h
//
//  Created by Hiroki Yagita on 11/04/09.
//  Copyright 2011 Hiroki Yagita. All rights reserved.
//

#import "HttpConnectionWrapper.h"


@implementation HttpConnectionWrapper
@synthesize payload, delegate;


-(void)startWithString:(NSString *)urlStr {
	NSLog(@"%s %@", __FUNCTION__, urlStr);

	NSURLRequest *req = [NSURLRequest requestWithURL:[NSURL URLWithString:urlStr]
										 cachePolicy:NSURLRequestUseProtocolCachePolicy
									 timeoutInterval:10.0];
	NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:req delegate:self];
	if (conn) {
		NSLog(@"%s connection started.", __FUNCTION__);
		self.payload = [[[NSMutableString alloc] initWithCapacity:65536] autorelease];
	} else {
		NSLog(@"%s connection failed.", __FUNCTION__);
	}
}

#pragma mark -
#pragma mark NSURLConnection delegate

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
	NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
	
	NSLog(@"%s connection:%@ response:%@", __FUNCTION__, connection, [httpResponse allHeaderFields]);
}

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
	NSLog(@"%s connection:%@", __FUNCTION__, connection);

	// TODO: encoding must be decide response header.
	//NSJapaneseEUCStringEncoding
	NSString *s = [[NSString alloc] initWithData:data
										encoding:NSUTF8StringEncoding];
	if (s) [self.payload appendString:s];
}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection {
	NSLog(@"%s connection:%@", __FUNCTION__, connection);
	
	[self.delegate didReceiveAllResponse:self withString:self.payload];
}


@end