网络缓存

#import 
#import "HttpRequestTool.h"

#define dispatch_async_main_queue(block)\
if ([NSThread isMainThread]) {\
block();\
} else {\
dispatch_async(dispatch_get_main_queue(), block);\
}

@interface HttpRequest : NSObject
+ (void)httpRequestStr:(NSString *)urlStr completion:(void (^)(NSData *data,NSURLResponse *response,NSError *error))completion;

+(void)postWithURL:(NSString *)urlStr pragram:(NSDictionary *)pragram completion:(void (^)(NSData *data, NSURLResponse *response, NSError *error))completion;

/**
 默认缓存 （内存4M，硬盘20M）
 */
+ (void)setDefaultCapacity;

/**
 设置内存缓存与硬盘缓存大小

 @param memoryCapacity  内存缓存大小
 @param maxDiskCapactiy 硬盘缓存大小
 */
+ (void)setMaxMesmoryCapacity:(NSUInteger)memoryCapacity
              maxDiskCapacity:(NSUInteger)maxDiskCapactiy;

/**
 获取缓存的大小
 */
+ (NSUInteger)getCacheCapacity;

/**
 删除指定位置的缓存
 @param request 指定的缓存
 */
+ (void)removeCapacheCapacityRequest:(NSURLRequest *)request;

/**
 删除全部缓存
 */
+ (void)removeAllCapacheResquest;

/**
 删除指定时间的缓存

 @param date 指定的时间
 */
+ (void)removeCacheResponseRequestSinceDate:(NSDate *)date;

/**
 get请求

 @param url               网络url
 @param paramgers         请求参数  pragram
 @param timeoutInterval   请求时间
 @param cachPolicy        缓存策略
 @param completionHandler 完成回调
 @param errorHandler      错误信息
 */
+ (void)getUrl:(NSString *)url
        paramger:(id)paramgers
       timeout:(NSTimeInterval)timeoutInterval
    cachPolicy:(CJRequestCachePolicy)cachPolicy
completionHandler:(void(^)(NSData *data,NSURLResponse *response))completionHandler
 errorHandeler:(void (^)(NSError *error))errorHandler;

/**
 post请求

 @param url               网络URL
 @param paramgers         请求参数 NSDictionary
 @param timeoutInterval   设置请求时间
 @param cachPolicy        缓存策略
 @param completionHandler 请求回调
 @param errorHandler      error
 */
+ (void)postUrl:(NSString *)url
      paramger:(id)paramgers
       timeout:(NSTimeInterval)timeoutInterval
    cachPolicy:(CJRequestCachePolicy)cachPolicy
completionHandler:(void(^)(NSData *data,NSURLResponse *response))completionHandler
 errorHandeler:(void (^)(NSError *error))errorHandler;

@end

#import "HttpRequest.h"
#import "YT_celvexiaoSettingVCViewController.h"
#import 
@implementation HttpRequest
//网络加载
+ (void)httpRequestStr:(NSString *)urlStr completion:(void (^)(NSData *data,NSURLResponse *response,NSError *error))completion {
    NSURL *url = [NSURL URLWithString:urlStr];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    NSURLSession *session = [NSURLSession sharedSession];
    request.cachePolicy = NSURLRequestReturnCacheDataElseLoad;
    NSURLCache *cache = [NSURLCache sharedURLCache];
    NSCachedURLResponse *response = [cache cachedResponseForRequest:request];
    if (response) {
        NSLog(@"response-存在这个缓存%@",response);
        [request setCachePolicy:NSURLRequestReturnCacheDataDontLoad];
        NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
            dispatch_async(dispatch_get_main_queue(), ^{
                completion (data , response, error);
            });
        }];
        [dataTask resume];
    }else {
        NSLog(@"response-不存在这个缓存%@",response);
        NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
            dispatch_async(dispatch_get_main_queue(), ^{
                completion (data , response, error);
            });
        }];
        [dataTask resume];
    }
}

+(void)postWithURL:(NSString *)urlStr pragram:(NSDictionary *)pragram completion:(void (^)(NSData *data, NSURLResponse *response, NSError *error))completion
{
//    if (pragram == nil) {
//        //        1:准备一个作为接口调用参数的 字典
//        NSMutableDictionary *pragram1 = [NSMutableDictionary dictionary];
//        //    设置相关参数
//        [pragram1 setObject:@1 forKey:@"appid"];
//        [pragram1 setObject:@22.535868 forKey:@"latitude"];
//        [pragram1 setObject:@113.950943 forKey:@"longitude"];
//        [pragram1 setObject:@"BCCFFAAB6A7D79D1E6D1478F2B432B83CD451E2660F067BF" forKey:@"memberdes"];
//        pragram = pragram1;
//    }
    
    //    1:解析参数
//    NSString *pragmStr = [self dealWithPragram:pragram];
    NSData *bodyData = [NSJSONSerialization dataWithJSONObject:pragram options:NSJSONWritingPrettyPrinted error:nil];
    //    2:创建URL 和 request
    NSURL *url = [NSURL URLWithString:urlStr];
    
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    
    //    3:设置相关请求
    
    request.HTTPMethod = @"POST";
    
    request.HTTPBody = bodyData;
    
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Length"];
    
//    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    
    //    4:发起请求
    
    NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
    
    NSURLSession *session = [NSURLSession sessionWithConfiguration:config];
    
    NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        
        //这个方法是 在子线程回调，需要回到主线程
        dispatch_async(dispatch_get_main_queue(), ^{
            completion (data,  response,  error);
        });
    }];
    
    [dataTask resume];
    
}

+ (NSString *)dealWithPragram:(NSDictionary *)pragram
{
    
    NSArray *allkeys = [pragram allKeys];
    NSMutableString *result = [NSMutableString string];
    for (NSString *key in allkeys) {
        
        [result appendString:[NSString stringWithFormat:@"%@=%@&",key , pragram[key]]];
    }
    
    return [result substringWithRange:(NSRange){0,result.length - 1}];
}

#pragma mark - Cache网络请求
+ (void)setDefaultCapacity {
    [HttpRequest setMaxMesmoryCapacity:4 maxDiskCapacity:20];
}

+ (void)setMaxMesmoryCapacity:(NSUInteger)memoryCapacity maxDiskCapacity:(NSUInteger)maxDiskCapactiy {
    NSURLCache *cache = [[NSURLCache alloc] initWithMemoryCapacity:memoryCapacity * 1024 * 1024 diskCapacity:maxDiskCapactiy * 1024 * 1024  diskPath:nil];
    [NSURLCache setSharedURLCache:cache];
}

//硬盘缓存的大小
+ (NSUInteger)getCacheCapacity {
    NSUInteger cacheCapacity = [[NSURLCache sharedURLCache] currentDiskUsage];
    return cacheCapacity;
}

//移除指定缓存
+ (void)removeCapacheCapacityRequest:(NSURLRequest *)request {
    @synchronized ([NSURLCache sharedURLCache]) {
        [[NSURLCache sharedURLCache] removeCachedResponseForRequest:request];
    }
}

//移除所有缓存
+ (void)removeAllCapacheResquest {
    @synchronized ([NSURLCache sharedURLCache]) {
        [[NSURLCache sharedURLCache] removeAllCachedResponses];
    }
}

//移除某段时间的缓存
+ (void)removeCacheResponseRequestSinceDate:(NSDate *)date {
    @synchronized ([NSURLCache sharedURLCache]) {
        [[NSURLCache sharedURLCache] removeCachedResponsesSinceDate:date];
    }
}

//get请求
+ (void)getUrl:(NSString *)url paramger:(id)paramgers timeout:(NSTimeInterval)timeoutInterval cachPolicy:(CJRequestCachePolicy)cachPolicy completionHandler:(void (^)(NSData *, NSURLResponse *))completionHandler errorHandeler:(void (^)(NSError *))errorHandler {
    NSMutableURLRequest *request = CJRequestWithURL(url, nil, paramgers, timeoutInterval, YES, cachPolicy);
    if (request == nil || [request isEqual:[NSNull null]]) {
        dispatch_async_main_queue(^{
            NSError *error;
            errorHandler(error);
        });
        return;
    }
    if (cachPolicy != CJRequestIgnoringLocalCacheData) {
        NSCachedURLResponse *response = [[NSURLCache sharedURLCache] cachedResponseForRequest:request];
        if (response != nil) {      //判断是否有缓存
            NSLog(@"存在缓存");
        }
    }else {
        [request setCachePolicy:NSURLRequestReloadIgnoringCacheData];
        [HttpRequest removeCapacheCapacityRequest:request];
    }
    
    NSURLSession *session = [NSURLSession sharedSession];
    NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        if ((error == nil || [error isEqual:[NSNull null]])&& data != nil) {
            dispatch_async_main_queue(^{
                completionHandler(data,response);
            });
            if (cachPolicy == CJRequestIgnoringLocalCacheData) {
                //忽略缓存，删除缓存
                [HttpRequest removeCapacheCapacityRequest:request];
            }
        }else {     //缓存出错，删除缓存
            dispatch_async_main_queue(^{
                errorHandler(error);
            });
            [HttpRequest removeCapacheCapacityRequest:request];
        }
    }];
    [task resume];
}

+ (void)postUrl:(NSString *)url paramger:(id)paramgers timeout:(NSTimeInterval)timeoutInterval cachPolicy:(CJRequestCachePolicy)cachPolicy completionHandler:(void (^)(NSData *, NSURLResponse *))completionHandler errorHandeler:(void (^)(NSError *))errorHandler {
    NSMutableURLRequest *request = CJRequestWithURL(url, @"POST", paramgers, timeoutInterval, YES, CJRequestIgnoringLocalCacheData);
    if (request == nil || [request isEqual:[NSNull null]]) {
        dispatch_async_main_queue(^{
            NSError *error;
            errorHandler(error);
        });
        return;
    }
    [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
    NSURLSession *session = [NSURLSession sharedSession];
    NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        if ((error == nil || [error isEqual:[NSNull null]]) && data != nil) {
            dispatch_async_main_queue(^{
                completionHandler(data,response);
            });
        }else {
            dispatch_async_main_queue(^{
                errorHandler(error);
            });
            [HttpRequest removeCapacheCapacityRequest:request];
        }
    }];
    [task resume];
}
@end