iOS网络通信类库用AFNetworking替换ASHttpRequest的解决方案
一、AFNetworking替换ASHttpRequest原因
经过近两年开发IOS使用AFNetworking和ASIHttpRequest的经验，结合在实际开发App的遇到网络问题
initData.m
经过近两年开发IOS使用AFNetworking和ASIHttpRequest的经验，结合在实际开发App的遇到网络问题
和线上app用户反馈及在用测试工具开发测试中的反应情况，最后得出结论AFNetworking的优点相对ASIHttpReqeuest的优点大一些，尤其在网络稳定性方面。处理crash这些情况，下面通过两者详细的优缺点比较了解 一下，为什么把ASIHttpRequest给替换成了ASNetworking。
二、AFNetworking的优缺点
优点:
维护和使用者相对多
对ARC的支持
对Block使用的支持非常好
维护和使用者相对多(目前已到2.4.1版)
专门对异步请求的支持
支持基于url缓存的支持
图片及NSURLCache、AFCache缓存实用
支持后台下载，缓存离线请求的支持(SDURLCache)
对JSON支持好
对实现的http请求比较容易
对https的支持
缺点:
是基于Foundation框架的NSURLConnection对网络进行的封装不是用的低层的
CFNetwork进行的封装扩展的功能目前相对少一些，但在Http上的网络支持已足够
ASIHttpRequest：
优点:
对网络底层CFNetwork支持，在性能上占优
对代理proxy支持设置比较方便
支持离线下载和基于url的缓存
对https的支持
对实现的http请求方面实现的不是太好，会多写点代码
支持异步和同步的支持
缺点:
在2012年社区已停止更新
对目前最新版本IOS7和8上使用时会有些问题，特别是网络异步请求多时，多线程使用时经常出现时容易出现网络不稳定的问题。
对ARC支持不好，不支持苹果推荐给我们使用的ARC性能
对Block不够好，框架代码在多线程方面用的不好
ASI框架在面向对象方面不够抽象
接口和实现代码看着过于庞大，里面过程化的实现比较严重不利于扩展和维护
三、在代码实现仅用GET请求来做一下AFNetworking和ASIHttpRequest的比较：
/**
* AFNetworking初始化HTTP
*/
- (void)httpInit
{
//应用配置文件
self.manager = [AFHTTPRequestOperationManager manager];
//申明返回的结果是JSON类型
self.manager.responseSerializer = [AFJSONResponseSerializer serializer];
//如果报接受类型不一致请替换一致text/html
self.manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
//清求时间设置
self.manager.requestSerializer.timeoutInterval = 30;
//设置代理
//[self setProxy];
//添加header头信息
[self addRequestHeader];
}
/**
* AFNetworking发送get请求
*/
- (void)startGet:(NSString*)uri tag:(NSInteger)tag
{
[self httpInit];
[self.manager GET:[NSString stringWithFormat:@"%@%@",self.baseUrl,uri] parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
[self requestFinished:responseObject tag:tag];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
[self requestFailed:tag];
}];
}
/**
* ASIHttpRequest初始化HTTP
*/
-(void)httpInit:(NSString *)method uri:(NSString *)uri
{
//应用配置文件
[self setRes:[ASIFormDataRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@%@",self.baseUrl,uri]]]];
//设置代理
if (self.host != nil) {
[self.res setProxyHost:self.host];
}
if (self.port > 0) {
[self.res setProxyPort:self.port];
}
//设置代理
[self.res setDelegate:self];
//设置允许记录cookie
[self.res setUseCookiePersistence:YES];
//超时设置
[self.res setTimeOutSeconds:30];
//请求方式
[self.res setRequestMethod:method];
}
/**
* ASIHttpRequest发送get请求
*/
- (void)startGet:(NSString*)uri tag:(NSInteger)tag{
[self cancel];//取消前一个请求
[self httpInit:@"GET" uri:uri];
[self.res setTag:tag];
[self.res startAsynchronous];
}
四、AFNetworking在Model层对app的网络请求的封装实现过的代码:
initData.h
//
// InitData.h
//
// Created by ligangming on 14-1-2.
// Copyright (c) 2014年 ligangming. All rights reserved.
//
#define DEFAULT_PAGESIZE 20 //默认分页数量
/**
请求完成处理
*/
typedef void (^Complete)();
/**
请求失败处理
*/
typedef void (^Failed)(NSString *state,NSString *errmsg);
/**
数据请求模型的基类，包含基本网络请求
*/
@interface InitData : NSObject{
@protected
Complete _complete; //请求完成
Failed _failed; //请求失败
}
//HTTP参数设置
@property(nonatomic,strong)NSString *baseUrl; //API基础地址
@property(nonatomic,strong)NSString *host; //代理主机IP地址
@property(nonatomic,assign)NSInteger port; //代理主机端口
@property(nonatomic,strong)NSString *errCode; //错误代码
@property(nonatomic,strong)NSString *errMsg; //错误描述
@property(nonatomic,strong)NSString *version; //协议版本(客户端兼容最小版本)
- (id)initWithDelegate:(id)delegate;
/**
* 发送get请求
*/
- (void)startGet:(NSString*)url tag:(NSInteger)tag;
/**
* 发送getCache请求
*/
- (void)startCache:(NSString *)aCacheName cacheTime:(NSInteger)aTime uri:(NSString *)uri tag:(NSInteger)tag;
/**
* 发送post请求
*/
- (void)startPost:(NSString*)url params:(NSDictionary*)params tag:(NSInteger)tag;
/**
* 上传文件
*/
- (void)uploadFileURI:(NSString*)aUri filePath:(NSString*)aPath keyName:(NSString *)aKeyName;
/**
* 取消请求
*/
- (void)cancel;
@end
#pragma mark delegate
@protocol InitDataDelegate <NSObject>
@optional
/**
请求完成时-调用
*/
-(void)getFinished:(NSDictionary *)msg tag:(NSInteger)tag;
/**
请求失败时-调用
*/
-(void)getError:(NSDictionary *)msg tag:(NSInteger)tag;
@end
initData.m
//
// InitData.m
//
// Created by ligangming on 14-1-2.
// Copyright (c) 2014年 ligangming. All rights reserved.
//
#import "InitData.h"
#import "AFNetworking.h"
Class object_getClass(id object);
@interface InitData()
{
Class afOrinClass;
}
@property(nonatomic,strong)AFHTTPRequestOperationManager *manager; //AF请求对象
@property(nonatomic,weak)id<InitDataDelegate> delegate;
@end
@implementation InitData
#pragma mark initData
- (id)initWithDelegate:(id)delegate
{
if ((self = [super init])) {
afOrinClass = object_getClass(delegate);
[self setDelegate:delegate];
[self setDefault];
}
return self;
}
/**
* 初始化设置
*/
- (void)setDefault
{
//载入系统配置
NSDictionary *cfgDic = [NSObject JzbGetConfig];
//API地址
[self setBaseUrl:[cfgDic objectForKey:@"apiUrl"]];
//代理HOST
if (![[cfgDic objectForKey:@"apiHost"] isEqualToString:@""]) {
[self setHost:[cfgDic objectForKey:@"apiHost"]];
//重置API地址(测试用)
[self setBaseUrl:[NSString stringWithFormat:@"http://%@", self.host]];
}else{
[self setHost:nil];
}
//代理port
[self setPort:[[cfgDic objectForKey:@"apiPort"] intValue]];
}
#pragma mark httpMode
/**
* 初始化HTTP
*/
- (void)httpInit
{
//应用配置文件
self.manager = [AFHTTPRequestOperationManager manager];
//申明返回的结果是JSON类型
self.manager.responseSerializer = [AFJSONResponseSerializer serializer];
//如果报接受类型不一致请替换一致text/html
self.manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
//清求时间设置
self.manager.requestSerializer.timeoutInterval = 30;
//设置代理
//[self setProxy];
//添加header头信息
[self addRequestHeader];
}
/**
* 添加header头信息
*/
- (void)addRequestHeader
{
//当前应用版块号
//应用类型IOS
//当前应用
[self.manager.requestSerializer setValue:@"xxx" forHTTPHeaderField:@"TOKEN"];
}
/**
* 发送get请求
*/
- (void)startGet:(NSString*)uri tag:(NSInteger)tag
{
[self httpInit];
[self.manager GET:[NSString stringWithFormat:@"%@%@",self.baseUrl,uri] parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
[self requestFinished:responseObject tag:tag];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
[self requestFailed:tag];
}];
}
- (AFHTTPRequestOperation *)cacheOperationWithRequest:(NSURLRequest *)urlRequest
tag:(NSInteger)tag
success:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
failure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure
{
AFHTTPRequestOperation *operation = [self.manager HTTPRequestOperationWithRequest:urlRequest success:^(AFHTTPRequestOperation *operation, id responseObject){
NSCachedURLResponse *cachedURLResponse = [[NSURLCache sharedURLCache] cachedResponseForRequest:urlRequest];
cachedURLResponse = [[NSCachedURLResponse alloc] initWithResponse:operation.response data:operation.responseData userInfo:nil storagePolicy:NSURLCacheStorageAllowed];
[[NSURLCache sharedURLCache] storeCachedResponse:cachedURLResponse forRequest:urlRequest];
success(operation,responseObject);
}failure:^(AFHTTPRequestOperation *operation, NSError *error) {
if (error.code == kCFURLErrorNotConnectedToInternet) {
NSCachedURLResponse *cachedResponse = [[NSURLCache sharedURLCache] cachedResponseForRequest:urlRequest];
if (cachedResponse != nil && [[cachedResponse data] length] > 0) {
success(operation, cachedResponse.data);
} else {
failure(operation, error);
}
} else {
failure(operation, error);
}
}];
return operation;
}
/**
* 发送getCache请求
*/
- (void)startCache:(NSString *)aCacheName cacheTime:(NSInteger)aTime uri:(NSString *)uri tag:(NSInteger)tag
{
[self httpInit];
AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];
NSMutableURLRequest *request = [serializer requestWithMethod:@"GET" URLString:[NSString stringWithFormat:@"%@%@",self.baseUrl,uri] parameters:nil error:nil];
[request setTimeoutInterval:20];
[request setCachePolicy:NSURLRequestUseProtocolCachePolicy]; //此处将NSURLRequestReturnCacheDataElseLoad替换要不然无论有无网络情况每次请求都会取本地缓存数据
//请求成功Block块
void (^requestSuccessBlock)(AFHTTPRequestOperation *operation, id responseObject) = ^(AFHTTPRequestOperation *operation, id responseObject) {
[self requestFinished:responseObject tag:tag];
};
//请求失败Block块
void (^requestFailureBlock)(AFHTTPRequestOperation *operation, NSError *error) = ^(AFHTTPRequestOperation *operation, NSError *error){
[self requestFailed:tag];
};
//请求数据
AFHTTPRequestOperation *operation = [self cacheOperationWithRequest:request tag:tag success:requestSuccessBlock failure:requestFailureBlock];
[self.manager.operationQueue addOperation:operation];
}
/**
* 获取缓存数据
*/
- (id)cachedResponseObject:(AFHTTPRequestOperation *)operation{
NSCachedURLResponse* cachedResponse = [[NSURLCache sharedURLCache] cachedResponseForRequest:operation.request];
AFHTTPResponseSerializer* serializer = [AFJSONResponseSerializer serializer];
id responseObject = [serializer responseObjectForResponse:cachedResponse.response data:cachedResponse.data error:nil];
return responseObject;
}
/**
* 发送post请求
*/
- (void)startPost:(NSString*)uri params:(NSDictionary*)params tag:(NSInteger)tag
{
[self httpInit];
[self.manager POST:[NSString stringWithFormat:@"%@%@",self.baseUrl,uri] parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
[self requestFinished:responseObject tag:tag];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
[self requestFailed:tag];
}];
}
/**
* 上传文件
*/
- (void)uploadFileURI:(NSString *)aUri filePath:(NSString *)aPath keyName:(NSString *)aKeyName
{
[self httpInit];
[self.manager POST:[NSString stringWithFormat:@"%@%@",self.baseUrl,aUri] parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
NSData *imageData = [[NSData alloc] initWithContentsOfFile:aPath];
//获取文件类型
NSMutableString *filePath = [NSMutableString stringWithString:aPath];
CFStringRef UTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)[filePath pathExtension], NULL);
CFStringRef MIMEType = UTTypeCopyPreferredTagWithClass (UTI, kUTTagClassMIMEType);
NSString *fileName = [filePath lastPathComponent];
//将得到的二进制图片拼接到表单中 /** data,指定上传的二进制流;name,服务器端所需参数名;fileName,指定文件名;mimeType,指定文件格式 */
[formData appendPartWithFileData:imageData name:aKeyName fileName:fileName mimeType:(__bridge NSString *)(MIMEType)];
}success:^(AFHTTPRequestOperation *operation, id responseObject){
[self requestFinished:responseObject tag:200];
}failure:^(AFHTTPRequestOperation *operation, NSError *error) {
}];
/*
/设置上传操作的进度
[operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
NSLog(@"Sent %lld of %lld bytes", totalBytesWritten, totalBytesExpectedToWrite);
}];
UIProgressView *progress = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault];
[progress setProgressWithUploadProgressOfOperation:operation animated:YES];
[progress setFrame:CGRectMake(0, 130, 320, 30)];
[self.view addSubview:progress];
*/
//[operation start];
}
/**
停止请求
*/
- (void)cancel
{
if (_manager != nil) {
_manager = nil;
}
}
/**
* 清理回调block
*/
- (void)cleanupBlocks
{
_complete = nil;
_failed = nil;
}
/*
解析通用协议头:
1.检查协议体合法性
2.协议版本检查，执行协议版本客户端处理逻辑
返回值：BOOL 通过解析检查返回YES,否则 NO
对于没有通过检查的协议消息，返回客户端协议错误的消息，或者版本不支持的错误
*/
- (BOOL)parseHead:(NSDictionary*)msg
{
//错误代码解析
//错误描述
//版本提取，客户端版本规则逻辑执行
return YES;
}
#pragma mark AFHTTPDelegate
/**
* 代理-请求结束
*/
- (void)requestFinished:(NSDictionary *)aDictionary tag:(NSInteger)aTag
{
//如果消息头解析成功并通过合法性检查
if([self parseHead:aDictionary] == YES){
if ([self.errCode intValue] <= 0) {
if ([self.delegate respondsToSelector:@selector(getFinished:tag:)]) {
[self.delegate getFinished:aDictionary tag:aTag];
}
}else{
if (_failed) {
_failed(self.errCode,self.errMsg);
}
if ([self.delegate respondsToSelector:@selector(getError:tag:)]) {
[self.delegate getError:aDictionary tag:aTag];
}
}
}
}
/**
* 代理-请求失败
*/
- (void)requestFailed:(NSInteger)aTag
{
if (afOrinClass != object_getClass(_delegate)) {
NSLog(@"model已销毁");
return;
}
if (_failed) {
_failed(@"1",@"request error");
}
//检测如果有配置代理则去执行代理
if ([self.delegate respondsToSelector:@selector(getError:tag:)]) {
NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:@"1",@"errcode",@"request error",@"errmsg", nil];
[self.delegate getError:dic tag:aTag];
}
}
@end