分享一個自己用的Objective-C的Http接連類

很久沒有更新博客了，所以分享一個。

@protocol HttpListenerDelegate;

@interface BaseHttp : NSObject
{
}

@property (nonatomic, weak) id<HttpListenerDelegate> delegate;

@property (nonatomic, M_STRONG) NSURLConnection *connect;
@property (nonatomic, M_STRONG) NSMutableData *receiveData;

@property (nonatomic, M_STRONG) NSString *httpUrl;
//設置當前服務的唯一標示，默認為當前的URL
@property (nonatomic, M_STRONG) NSString *identify;

- (id)initWithHttpUrl:(NSString *)url;

//開始調用遠程服務
- (void)execute;
- (void)execute:(id)param;
//接收到服務器回應的時候調用此方法
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response;
//接收到服務器傳輸數據的時候調用，此方法根據數據大小執行若干次
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data;
//數據傳完之后調用此方法
- (void)connectionDidFinishLoading:(NSURLConnection *)connection;
//網絡請求過程中，出現任何錯誤（斷網，連接超時等）會進入此方法
- (void)connection:(NSURLConnection *)connection
 didFailWithError:(NSError *)error;

@end


@protocol HttpListenerDelegate <NSObject>

@optional
//接收到服務器回應的時候調用此方法
- (void)didReceiveResponse:(NSURLResponse *)response identify:(NSString *)identify;

- (void)didReceiveData:(NSData *)data identify:(NSString *)identify;
//后台加載數據完成
- (void)didFinishLoading:(NSMutableData*)receiveData identify:(NSString *)identify;
//網絡請求異常
- (void)didFailWithError:(NSError *)error identify:(NSString *)identify;

@end

　　

//
//  BaseHttp.m
//  myb-ios
//
//  Created by warrior gao on 13-6-7.
//  Copyright (c) 2013年 51myb. All rights reserved.
//

#import "BaseHttp.h"

@implementation BaseHttp

- (id)initWithHttpUrl:(NSString *)url
{
    self = [self init];
    _httpUrl = [NSString stringWithFormat: @"%@%@",SERVER_URL, url];
    _identify = url;
    return self;
}

-(void)setHttpUrl:(NSString *)httpUrl
{
    _httpUrl = httpUrl;
    if(!(_identify))
        _identify = httpUrl;
}

//開始調用遠程服務
- (void)execute
{
    [self execute:@""];
}


- (void)execute:(id)param
{
    if(DEBUG) {
        NSLog(@"開始請求:%@", _httpUrl);
    }
    
    //第一步，創建URL
    NSURL *url = [NSURL URLWithString:_httpUrl];
    //第二步，創建請求
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:DEFAULT_HTTP_TIMEOUT];
    [request setHTTPMethod:@"POST"];//設置請求方式為POST，默認為GET
    [request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request addValue:HTTP_HEADER_VALUE forHTTPHeaderField:HTTP_HEADER_KEY];
    
    NSData *bodyData = nil;
    if([param isKindOfClass:[NSString class]]){
        bodyData = [param dataUsingEncoding:NSUTF8StringEncoding];
    } else if ([param isKindOfClass:[NSData class]]){
        bodyData = param;
    } else if ([param isKindOfClass:[NSNumber class]]) {
        bodyData = [[param stringValue] dataUsingEncoding:NSUTF8StringEncoding];
    }
    
    [request setHTTPBody:bodyData];
        
    //第三步，連接服務器
    
    _connect = [[NSURLConnection alloc] initWithRequest:request delegate:self];
    if(_connect){
        _receiveData = [NSMutableData data];
    }
}

//接收到服務器回應的時候調用此方法
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    [_receiveData setLength:0];
    if([_delegate respondsToSelector:@selector(didReceiveResponse:identify:)])
        [_delegate didReceiveResponse:response identify:_identify];
}
//接收到服務器傳輸數據的時候調用，此方法根據數據大小執行若干次
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [_receiveData appendData:data];
    if([_delegate respondsToSelector:@selector(didReceiveData:identify:)])
        [_delegate didReceiveData:data identify:_identify];
}
//數據傳完之后調用此方法
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    if(DEBUG){
        NSLog(@"請求后台數據完成---:%@",_identify);
    }
    
    if(DEBUG){
        NSString *receiveStr = [[NSString alloc] initWithData:_receiveData encoding:NSUTF8StringEncoding];
        NSLog(@"%@",receiveStr);
    }
    
    if([_delegate respondsToSelector:@selector(didFinishLoading:identify:)])
        [_delegate didFinishLoading:_receiveData identify:_identify];
}
//網絡請求過程中，出現任何錯誤（斷網，連接超時等）會進入此方法
- (void)connection:(NSURLConnection *)connection
 didFailWithError:(NSError *)error
{
    if(DEBUG){
         NSLog(@"%@",[error localizedDescription]);
    }
   
    if([_delegate respondsToSelector:@selector(didFailWithError:identify:)])
        [_delegate didFailWithError:error identify:_identify];
    else {
        [AlertViewHelper alertMessage:HTTP_CONNECT_ERROR];
    }
}



@end