react-native ios 集成httpdns

作者: 45b645c5912e | 来源:发表于2017-09-07 15:57 被阅读264次

    react-native 项目 iOS端集成httpdns

    集成步骤

    • 手动集成
      • 下载SDK,将组建包拖入项目中
        AlicloudHttpDNS.framework
        AlicloudUtils.framework
        UTDID.framework
      • 添加系统库
        libresolv.tbd
        CoreTelephony.framework
        SystemConfiguration.framework
    • Pod集成
      • 指定Master仓库和阿里云仓库:
        source 'https://github.com/CocoaPods/Specs.git'
        source 'https://github.com/aliyun/aliyun-specs.git'
      • 添加依赖:
        pod 'AlicloudHTTPDNS', '~> 1.5.2'
    • 修改编译选项
      • Target->Build Setting->Linking->Other Linker Flags中添加 -ObjC 选项。

    原生入口基本配置

    • AppDelegate 入口处添加如下配置代码
    /** httpdns */
      // 初始化HTTPDNS
      // 设置AccoutID
      HttpDnsService *httpdns = [[HttpDnsService alloc] initWithAccountID:xxxxx];
      //鉴权方式初始化
      //HttpDnsService *httpdns = [[HttpDnsService alloc] initWithAccountID:0000 secretKey:@"XXXX"];
      
      // 为HTTPDNS服务设置降级机制
    //  [httpdns setDelegateForDegradationFilter:self];
      // 允许返回过期的IP
      [httpdns setExpiredIPEnabled:YES];
      // 打开HTTPDNS Log,线上建议关闭
      [httpdns setLogEnabled:YES];
      /*
       *  设置HTTPDNS域名解析请求类型(HTTP/HTTPS),若不调用该接口,默认为HTTP请求;
       *  SDK内部HTTP请求基于CFNetwork实现,不受ATS限制。
       */
      //[httpdns setHTTPSRequestEnabled:YES];
      // edited
      NSArray *preResolveHosts = @[ @"www.xxx.cn", @"www.xxx.cn"];
      // NSArray* preResolveHosts = @[@"pic1cdn.igetget.com"];
      // 设置预解析域名列表
      [httpdns setPreResolveHosts:preResolveHosts];
    
    • 如果需要降级机制实现需要遵循HttpDNSDegradationDelegate协议实现下面的代理方法
    /*
     * 降级过滤器,您可以自己定义HTTPDNS降级机制
     */
    - (BOOL)shouldDegradeHTTPDNS:(NSString *)hostName {
        NSLog(@"Enters Degradation filter.");
        // 根据HTTPDNS使用说明,存在网络代理情况下需降级为Local DNS
        if ([NetworkManager configureProxies]) {
            NSLog(@"Proxy was set. Degrade!");
            return YES;
        }
        
        // 假设您禁止"www.taobao.com"域名通过HTTPDNS进行解析
        if ([hostName isEqualToString:@"www.taobao.com"]) {
            NSLog(@"The host is in blacklist. Degrade!");
            return YES;
        }
        
        return NO;
    }
    

    修改react-native 网络请求库

    WechatIMG52.jpeg
    • 首先根据上图步骤进行到第四步,添加一个路径$(SRCROOT)/../../../../ios(否则无法再Libraries下的依赖库下访问主项目中刚刚添加的SDK)
    • 进入标记5中RCTHTTPRequestHandler.mm文件
      • 首先引入#import <AlicloudHttpDNS/AlicloudHttpDNS.h>上述步骤路径如果配置错误,这里将会报文件找不到的错误
      • 实现一个NSMutableURLRequest属性用来保存发送的request
        @property (nonatomic, strong) NSMutableURLRequest *request;
      • 在数据发起request请求方法中(- (NSURLSessionDataTask *)sendRequest:(NSURLRequest *)request withDelegate:(id<RCTURLRequestDelegate>)delegate)获取IP并替换
      • 由于ios目前都是https请求,所以进行一步拦截证书的操作,遵循NSURLSessionTaskDelegate协议并实现下面的代理方法
    #pragma mark - NSURLSessionTaskDelegate
    - (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition, NSURLCredential *_Nullable))completionHandler {
      if (!challenge) {
        return;
      }
      NSURLSessionAuthChallengeDisposition disposition = NSURLSessionAuthChallengePerformDefaultHandling;
      NSURLCredential *credential = nil;
      /*
       * 获取原始域名信息。
       */
      NSString *host = [[self.request allHTTPHeaderFields] objectForKey:@"host"];
      if (!host) {
        host = self.request.URL.host;
      }
      if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
        if ([self evaluateServerTrust:challenge.protectionSpace.serverTrust forDomain:host]) {
          disposition = NSURLSessionAuthChallengeUseCredential;
          credential = [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust];
        } else {
          disposition = NSURLSessionAuthChallengePerformDefaultHandling;
        }
      } else {
        disposition = NSURLSessionAuthChallengePerformDefaultHandling;
      }
      // 对于其他的challenges直接使用默认的验证方案
      completionHandler(disposition, credential);
    }
    - (BOOL)evaluateServerTrust:(SecTrustRef)serverTrust
                      forDomain:(NSString *)domain {
      /*
       * 创建证书校验策略
       */
      NSMutableArray *policies = [NSMutableArray array];
      if (domain) {
        [policies addObject:(__bridge_transfer id) SecPolicyCreateSSL(true, (__bridge CFStringRef) domain)];
      } else {
        [policies addObject:(__bridge_transfer id) SecPolicyCreateBasicX509()];
      }
      /*
       * 绑定校验策略到服务端的证书上
       */
      SecTrustSetPolicies(serverTrust, (__bridge CFArrayRef) policies);
      /*
       * 评估当前serverTrust是否可信任,
       * 官方建议在result = kSecTrustResultUnspecified 或 kSecTrustResultProceed
       * 的情况下serverTrust可以被验证通过,https://developer.apple.com/library/ios/technotes/tn2232/_index.html
       * 关于SecTrustResultType的详细信息请参考SecTrust.h
       */
      SecTrustResultType result;
      SecTrustEvaluate(serverTrust, &result);
      return (result == kSecTrustResultUnspecified || result == kSecTrustResultProceed);
    }
    
    • 大功告成,附上这段代码的截图

    • WechatIMG53.jpeg
    • WechatIMG54.jpeg
    • WechatIMG55.jpeg
    • WechatIMG56.jpeg

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