基于ASIHTTPRequest封装的HttpClient

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ASIHTTPRequest作为一个比较知名的http访问库本身功能比较强大，在项目开发过程中，如果每个请求，都要使用ASIHTTPRequest来写，有以下几个弊端：

（1）繁琐，无封装性。

（2）如果直接Synchronous方法，阻塞UI,而使用异步的Asynchronous，则要写很多委托，也是非常的麻烦.

（3）http请求基本上是给一个请求，返回一个请求结果，直接使用ASIHTTPRequest还无法做到，所以需要有一个比较好的封装。

基于以上的三个原因，做了一个封装

（1）头文件

//
// HttpClient.h
//
// Created by likwo on 11-9-7.
// blog http://www.cnblogs.com/likwo
// Copyright 2013年 . All rights reserved.
//#import <Foundation/Foundation.h>
#import "ASIHTTPRequestDelegate.h"
#import "ASIHTTPRequest.h"@interface HttpClient : NSObject <ASIHTTPRequestDelegate>
{
BOOL isRequestFinish;
NSMutableDictionary *postData;
}@property (nonatomic, retain) NSMutableDictionary *postData;
@property (nonatomic, assign) BOOL isRequestFinish;
@property (nonatomic, assign) NSInteger timeOutSecond;
@property (nonatomic, retain)ASIHTTPRequest *request;-(NSString *)get:(NSString *)url error:(NSError **)error;-(NSString *)post:(NSString *)url postData:(NSDictionary *)data error:(NSError **)error;- (void)cancel;@end

（2）实现文件

//
// HttpClient.m
// blog http://www.cnblogs.com/likwo
// Copyright 2013年 . All rights reserved.
//#import "HttpClient.h"
#import "ASIHTTPRequest.h"
#import "ASIFormDataRequest.h"@interface HttpClient()@end@implementation HttpClient
@synthesize isRequestFinish;
@synthesize postData;-(void)dealloc
{
self.postData = nil;
[self.request release];
[super dealloc];
}- (id)init
{
self = [super init]; if (self) {
self.timeOutSecond = 10;
}
return self;
}-(NSData *)get:(NSString *)url method:(NSString *)method body:(NSString *)body error:(NSError **)error
{
return [self.request responseData];
}-(NSString *)get:(NSString *)url error:(NSError **)error;
{#ifdef DEBUG
NSLog(@"request get url %@",url);
#endif NSURL *nsUrl = [NSURL URLWithString:url];
self.request = nil; self.request = [ASIHTTPRequest requestWithURL:nsUrl];
[self.request setTimeOutSeconds:self.timeOutSecond];
self.request.delegate = self;
self.isRequestFinish = NO; [self.request startAsynchronous]; while( !self.isRequestFinish)
{
[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
} if ([self.request error])
{
*error = [self.request error]; return nil;
} NSData *responseData = [self.request responseData]; NSString *retStr = [[[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding] autorelease]; if (retStr == nil)
{
retStr = [[NSString alloc] initWithData:responseData encoding:NSUnicodeStringEncoding];
}#ifdef DEBUG
NSLog(@"str %@",retStr);
#endif
return retStr;
}-(NSString *)post:(NSString *)url postData:(NSDictionary *)data error:(NSError **)error;
{#ifdef DEBUG
NSLog(@"request post url %@",url);
#endif NSURL *nsUrl = [NSURL URLWithString:url];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:nsUrl];
[request setDelegate:self]; for(id key in [data allKeys])
{
[request setPostValue:[self.postData objectForKey:key] forKey:(NSString *)key];
} [request buildPostBody];#ifdef DEBUG
NSString * str = [[[NSString alloc] initWithData:[request postBody] encoding:NSUTF8StringEncoding] autorelease];
NSLog(@"str %@",str);
#endif [request startAsynchronous]; self.isRequestFinish = NO;
while( !self.isRequestFinish )
{
[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
} if ([request error])
{
*error = [request error]; return nil;
} return [[[NSString alloc] initWithData:[request responseData] encoding:NSUTF8StringEncoding] autorelease]; return nil;
}- (void)requestFinished:(ASIHTTPRequest *)request
{
self.isRequestFinish = YES;
}- (void)requestFailed:(ASIHTTPRequest *)request
{
self.isRequestFinish = YES;
}- (void)cancel
{
[self.request cancel];
}@end