iOS NSURLConnection POST异步请求封装,支持转码GBK,HTTPS等

.h文件

#import <Foundation/Foundation.h>

//成功的回调

typedef void(^successBlock)(id responseObj);

//失败的回调

typedef void(^failureBlock)(NSError *error);

@interface HttpGBK : NSObject<NSURLConnectionDataDelegate>

{

successBlock _saveSuccessBlock;//用于保存成功的回调

failureBlock _saveFailureBlock;//用于保存失败的回调

NSMutableData *_recevieData;//接收数据

}

+ (instancetype)shareInstance;

//自定义的POST方法

- (void)POST:(NSString *)urlString parameters:(NSDictionary *)parameters success:(successBlock)success failure:(failureBlock)failure;

@end

.m文件

#import "HttpGBK.h"

@implementation HttpGBK

+ (instancetype)shareInstance

{

static HttpGBK *manager = nil;

@synchronized(self)

{

//如果为空,则实例化

if (manager == nil)

{

manager = [[HttpGBK alloc]init];

}

}

//如果已经实例化过,直接返回

return manager;

}

//重写构造方法

- (instancetype)init

{

self = [super init];

if (self)

{

_recevieData = [[NSMutableData alloc]init];

}

return self;

}

- (void)POST:(NSString *)urlString parameters:(NSDictionary *)parameters success:(successBlock)success failure:(failureBlock)failure

{

//对数据进行备份,以防传输过程中丢失数据

_saveSuccessBlock = [success copy];

_saveFailureBlock = [failure copy];

NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);

NSString *str= [self makeParameters:parameters];

　　//设置传输的参数为GBK

　　 NSData *pramaData = [str dataUsingEncoding:enc];

//拼接URL

NSURL *requeturl = [NSURL URLWithString:[NSString stringWithFormat:@"%@%@",BESTURL,urlString]];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:requeturl];

//设置为POST请求

request.HTTPMethod = @"POST";

　　//设置请求体

request.HTTPBody = pramaData;

NSString *charset = (__bridge NSString *)CFStringConvertEncodingToIANACharSetName(CFStringConvertNSStringEncodingToEncoding(enc));

　　//设置请求头

[request setValue:[NSString stringWithFormat:@"application/x-www-form-urlencoded; charset=%@", charset] forHTTPHeaderField:@"Content-Type"];

//设置请求头的长度

[request addValue:[NSString stringWithFormat:@"%ld",[pramaData length]] forHTTPHeaderField:@"Content-Length"];

//发起异步请求

[NSURLConnection connectionWithRequest:request delegate:self];

}

#pragma mark -NSURLConnectionDataDelegate

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response

{

_recevieData.length = 0;

}

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

{

[_recevieData appendData:data];

}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error

{

//如果有保存失败的回调才做回调.避免崩溃

if (_saveFailureBlock)

{

_saveFailureBlock(error);

}

}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection

{

//成功的回调

NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);

NSString *string = [[NSString alloc] initWithBytes:[_recevieData bytes] length:[_recevieData length] encoding:enc];

NSData *newData = [string dataUsingEncoding:NSUTF8StringEncoding];

id obj = [NSJSONSerialization JSONObjectWithData:newData options:NSJSONReadingMutableContainers error:nil];

if (_saveSuccessBlock)

{

//转化成功,传回字典.转化失败,把二进制数据原样传回

if (obj)

{

_saveSuccessBlock(obj);

}else

{

_saveSuccessBlock(_recevieData);

}

}

}

/**

* 接收任何证书

*

*/

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge;

{

NSLog(@"https?");

[challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];

}

/**

*处理SSL

*

*/

- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace

{

return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust];

}

//字典转化为字符串

-(NSString *)makeParameters:(NSDictionary *)dic

{

NSMutableArray *tempArray = [NSMutableArray array];

NSArray *keyArray = [dic allKeys];

for (NSString *key in keyArray) {

NSString *valueString = [dic objectForKey:key];

NSString *formattedString = [NSString stringWithFormat:@"%@=%@", key, valueString];

[tempArray addObject:formattedString];

}

NSString *finalString = [tempArray componentsJoinedByString:@"&"];

return finalString;

}