高級網絡關於鏈式網絡請求

鏈式網絡使用教程

鏈式網絡請求其實主要用於管理有相互依賴的網絡請求，它實際上最終能夠用來管理多個拓撲排序後的網絡請求。

例如，咱們有一個需求，須要用戶先發送註冊Api，而後獲取用戶信息Api，最後再獲取用戶id等信息。

鏈式插件方案

• 方案1：採用自定義參數方式處理

/// 鏈式網絡請求
/// @param request 請求體系
/// @param success 所有成功回調，存放請求全部結果數據
/// @param failure 失敗回調，只要一個失敗就會響應
/// @param chain 鏈式回調，返回下個網絡請求體，爲空時便可結束後續請求，responseObject上個網絡請求響應數據
+ (void)HTTPChainRequest:(__kindof KJNetworkingRequest *)request
                 success:(KJNetworkChainSuccess)success
                 failure:(KJNetworkChainFailure)failure
                   chain:(KJNetworkNextChainRequest)chain,...;
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• 方案2：採用鏈式閉包方式處理

/// 鏈式網絡請求，需 `chain` 和 `lastchain` 配合使用
/// @param request 請求體系
/// @param failure 失敗回調，只要一個失敗就會響應
/// @return 返回自身對象
+ (instancetype)HTTPChainRequest:(__kindof KJNetworkingRequest *)request failure:(KJNetworkChainFailure)failure;
/// 請求體傳遞載體，回調返回上一個網絡請求結果
@property (nonatomic, copy, readonly) KJNetworkChainManager * (^chain)(KJNetworkNextChainRequest);
/// 最後鏈數據回調，回調最後一個網絡請求結果
@property (nonatomic, copy, readonly) void(^lastChain)(void(^)(id responseObject));
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使用教程

• 方案1：採用不定參數方式處理

使用說明：

實例化第一個網絡請求體request，獲取到數據回調在chain，而後解析return給第二個網絡請求體request，而後依次類推，最終以**nil**結尾便可。

success回調：可拿到所有網絡響應數據，目錄和請求順序一致
failure回調：只要當中某一個網絡失敗，即響應失敗

測試用例：

// 測試不定參數方式鏈式網絡請求
- (void)testMoreChainNetworking{
    XCTestExpectation * expectation = [self expectationWithDescription:@"test more chain."];
    
    KJNetworkingRequest * request = [[KJNetworkingRequest alloc] init];
    request.method = KJNetworkRequestMethodGET;
    request.ip = @"https://www.douban.com";
    request.path = @"/j/app/radio/channels";
    request.responseSerializer = KJSerializerJSON;
    
    [KJNetworkChainManager HTTPChainRequest:request success:^(NSArray<id> * _Nonnull responseArray) {
        NSLog(@"----%@",responseArray);
        [expectation fulfill];
    } failure:^(NSError * _Nonnull error) {
        XCTFail(@"%@", error.localizedDescription);
    } chain:^__kindof KJNetworkingRequest * _Nullable(id  _Nonnull responseObject) {
        NSArray * array = responseObject[@"channels"];
        NSDictionary * dict = array[arc4random() % array.count];
        KJNetworkingRequest * request = [[KJNetworkingRequest alloc] init];
        request.method = KJNetworkRequestMethodGET;
        request.ip = @"https://www.douban.com";
        request.path = [@"/j/app/radio/channels/channel_id=" stringByAppendingFormat:@"%@",dict[@"channel_id"]];
        request.responseSerializer = KJSerializerJSON;
        return request;
    }, ^__kindof KJNetworkingRequest * _Nullable(id  _Nonnull responseObject) {
        KJNetworkingRequest * request = [[KJNetworkingRequest alloc] init];
        request.method = KJNetworkRequestMethodGET;
        request.ip = @"https://www.douban.com";
        request.path = @"/j/app/radio/channels";
        request.responseSerializer = KJSerializerJSON;
        return request;
    }, ^__kindof KJNetworkingRequest * _Nullable(id  _Nonnull responseObject) {
        NSArray * array = responseObject[@"channels"];
        NSDictionary * dict = array[arc4random() % array.count];
        KJNetworkingRequest * request = [[KJNetworkingRequest alloc] init];
        request.method = KJNetworkRequestMethodGET;
        request.ip = @"https://www.douban.com";
        request.path = [@"/j/app/radio/channels/channel_id=" stringByAppendingFormat:@"%@",dict[@"channel_id"]];
        request.responseSerializer = KJSerializerJSON;
        return request;
    }, nil];
    
    [self waitForExpectationsWithTimeout:300 handler:nil];
}
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• 方案2：採用鏈式閉包方式處理

使用說明：

實例化第一個網絡請求體request，而後經過鏈式閉包方式chain獲取到上一個響應結果，而後return第二個網絡請求體request，依次類推，最後一個網絡請求響應結果則經過lastChain獲取responseObject 便可。

failure回調：只要當中某一個網絡失敗，即響應失敗

測試用例：

// 測試鏈式網絡請求
- (void)testChainNetworking{
    XCTestExpectation * expectation = [self expectationWithDescription:@"test chain."];
    
    KJNetworkingRequest * request = [[KJNetworkingRequest alloc] init];
    request.method = KJNetworkRequestMethodGET;
    request.ip = @"https://www.douban.com";
    request.path = @"/j/app/radio/channels";
    request.responseSerializer = KJSerializerJSON;
    
    [KJNetworkChainManager HTTPChainRequest:request failure:^(NSError * _Nonnull error) {
        XCTFail(@"%@", error.localizedDescription);
    }].chain(^__kindof KJNetworkingRequest * _Nullable(id  _Nonnull responseObject) {
        NSArray * array = responseObject[@"channels"];
        NSDictionary * dict = array[arc4random() % array.count];
        KJNetworkingRequest * request = [[KJNetworkingRequest alloc] init];
        request.method = KJNetworkRequestMethodGET;
        request.ip = @"https://www.douban.com";
        request.path = [@"/j/app/radio/channels/channel_id=" stringByAppendingFormat:@"%@",dict[@"channel_id"]];
        request.responseSerializer = KJSerializerJSON;
        return request;
    }).lastChain(^(id  _Nonnull responseObject) {
        NSLog(@"----%@",responseObject);
        [expectation fulfill];
    });
    
    [self waitForExpectationsWithTimeout:300 handler:nil];
}
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大體介紹就差很少這麼多吧，其實這類網絡使用通常都是在我的中心

Cocoapods安裝

pod 'KJNetworkPlugin/Chain'
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