react-native 項(xiàng)目 iOS端集成httpdns

• 官方文檔 https://help.aliyun.com/document_detail/30143.html
• Demo地址 https://github.com/aliyun/alicloud-ios-demo/tree/master/httpdns_ios_demo

集成步驟

• 手動(dòng)集成
  • 下載SDK，將組建包拖入項(xiàng)目中
    AlicloudHttpDNS.framework
AlicloudUtils.framework
UTDID.framework
  • 添加系統(tǒng)庫(kù)
    libresolv.tbd
CoreTelephony.framework
SystemConfiguration.framework
• Pod集成
  • 指定Master倉(cāng)庫(kù)和阿里云倉(cāng)庫(kù)：
    source 'https://github.com/CocoaPods/Specs.git'
source 'https://github.com/aliyun/aliyun-specs.git'
  • 添加依賴：
    pod 'AlicloudHTTPDNS', '~> 1.5.2'
• 修改編譯選項(xiàng)
  • 在 Target->Build Setting->Linking->Other Linker Flags中添加 -ObjC 選項(xiàng)蛾娶。

原生入口基本配置

• AppDelegate 入口處添加如下配置代碼

/** httpdns */
  // 初始化HTTPDNS
  // 設(shè)置AccoutID
  HttpDnsService *httpdns = [[HttpDnsService alloc] initWithAccountID:xxxxx];
  //鑒權(quán)方式初始化
  //HttpDnsService *httpdns = [[HttpDnsService alloc] initWithAccountID:0000 secretKey:@"XXXX"];
  
  // 為HTTPDNS服務(wù)設(shè)置降級(jí)機(jī)制
//  [httpdns setDelegateForDegradationFilter:self];
  // 允許返回過期的IP
  [httpdns setExpiredIPEnabled:YES];
  // 打開HTTPDNS Log灯谣，線上建議關(guān)閉
  [httpdns setLogEnabled:YES];
  /*
   *  設(shè)置HTTPDNS域名解析請(qǐng)求類型(HTTP/HTTPS)，若不調(diào)用該接口蛔琅，默認(rèn)為HTTP請(qǐng)求胎许；
   *  SDK內(nèi)部HTTP請(qǐng)求基于CFNetwork實(shí)現(xiàn)，不受ATS限制。
   */
  //[httpdns setHTTPSRequestEnabled:YES];
  // edited
  NSArray *preResolveHosts = @[ @"www.xxx.cn", @"www.xxx.cn"];
  // NSArray* preResolveHosts = @[@"pic1cdn.igetget.com"];
  // 設(shè)置預(yù)解析域名列表
  [httpdns setPreResolveHosts:preResolveHosts];

• 如果需要降級(jí)機(jī)制實(shí)現(xiàn)需要遵循HttpDNSDegradationDelegate協(xié)議實(shí)現(xiàn)下面的代理方法

/*
 * 降級(jí)過濾器辜窑，您可以自己定義HTTPDNS降級(jí)機(jī)制
 */
- (BOOL)shouldDegradeHTTPDNS:(NSString *)hostName {
    NSLog(@"Enters Degradation filter.");
    // 根據(jù)HTTPDNS使用說明钩述，存在網(wǎng)絡(luò)代理情況下需降級(jí)為L(zhǎng)ocal DNS
    if ([NetworkManager configureProxies]) {
        NSLog(@"Proxy was set. Degrade!");
        return YES;
    }
    
    // 假設(shè)您禁止"www.taobao.com"域名通過HTTPDNS進(jìn)行解析
    if ([hostName isEqualToString:@"www.taobao.com"]) {
        NSLog(@"The host is in blacklist. Degrade!");
        return YES;
    }
    
    return NO;
}

修改react-native 網(wǎng)絡(luò)請(qǐng)求庫(kù)

WechatIMG52.jpeg

• 首先根據(jù)上圖步驟進(jìn)行到第四步，添加一個(gè)路徑$(SRCROOT)/../../../../ios(否則無法再Libraries下的依賴庫(kù)下訪問主項(xiàng)目中剛剛添加的SDK)
• 進(jìn)入標(biāo)記5中RCTHTTPRequestHandler.mm文件
  • 首先引入#import <AlicloudHttpDNS/AlicloudHttpDNS.h>上述步驟路徑如果配置錯(cuò)誤穆碎，這里將會(huì)報(bào)文件找不到的錯(cuò)誤
  • 實(shí)現(xiàn)一個(gè)NSMutableURLRequest屬性用來保存發(fā)送的request
@property (nonatomic, strong) NSMutableURLRequest *request;
  • 在數(shù)據(jù)發(fā)起request請(qǐng)求方法中（- (NSURLSessionDataTask *)sendRequest:(NSURLRequest *)request withDelegate:(id<RCTURLRequestDelegate>)delegate）獲取IP并替換
  • 由于ios目前都是https請(qǐng)求牙勘，所以進(jìn)行一步攔截證書的操作，遵循NSURLSessionTaskDelegate協(xié)議并實(shí)現(xiàn)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;
  /*
   * 獲取原始域名信息所禀。
   */
  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;
  }
  // 對(duì)于其他的challenges直接使用默認(rèn)的驗(yàn)證方案
  completionHandler(disposition, credential);
}
- (BOOL)evaluateServerTrust:(SecTrustRef)serverTrust
                  forDomain:(NSString *)domain {
  /*
   * 創(chuàng)建證書校驗(yàn)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()];
  }
  /*
   * 綁定校驗(yàn)策略到服務(wù)端的證書上
   */
  SecTrustSetPolicies(serverTrust, (__bridge CFArrayRef) policies);
  /*
   * 評(píng)估當(dāng)前serverTrust是否可信任方面，
   * 官方建議在result = kSecTrustResultUnspecified 或 kSecTrustResultProceed
   * 的情況下serverTrust可以被驗(yàn)證通過，https://developer.apple.com/library/ios/technotes/tn2232/_index.html
   * 關(guān)于SecTrustResultType的詳細(xì)信息請(qǐng)參考SecTrust.h
   */
  SecTrustResultType result;
  SecTrustEvaluate(serverTrust, &result);
  return (result == kSecTrustResultUnspecified || result == kSecTrustResultProceed);
}

• 大功告成北秽，附上這段代碼的截圖

• WechatIMG53.jpeg
• WechatIMG54.jpeg

• WechatIMG55.jpeg

• WechatIMG56.jpeg