tencent cloud

/**
    Encryption method
**/
typedef enum {
    HttpDnsEncryptTypeDES = 0, // DES encryption
    HttpDnsEncryptTypeAES = 1, // AES encryption
    HttpDnsEncryptTypeHTTPS = 2 // HTTPS encryption, this method is not supported on the international site
} HttpDnsEncryptType;

/**
     IP address type
**/
typedef enum {
    HttpDnsAddressTypeAuto = 0, // Automatically detected by the SDK
    HttpDnsAddressTypeIPv4 = 1, // Only IPv4 is supported
    HttpDnsAddressTypeIPv6 = 2, // Only IPv6 is supported
    HttpDnsAddressTypeDual = 3, // Both protocols are supported
} HttpDnsAddressType;

/**
    Configuration structure
    You can get the following authentication information after activating the service in the HTTPDNS console (https://console.tencentcloud.com/httpdns/configure).
**/
typedef struct DnsConfigStruct {
    int dnsId; // Authorization ID, which you can directly view in the HTTPDNS console after applying
    NSString* dnsKey; // Encryption key, which you must pass in for the AES or DES encryption method and can view in the HTTPDNS console after applying. It is used for DNS authentication
    NSString* dnsIp; // [For v1.8.0 and later, the IP is scheduled inside the SDK and you do not need to set it] HTTPDNS server IP. The service addresses for the HTTP protocols is `119.29.29.98` 
    BOOL debug; // Specify whether to enable debug logging. `YES`: Enable; `NO`: Disable. We recommend you enable it during joint testing and disable it before launch
    int timeout; // Timeout period in milliseconds, which is optional. If you set it to `0`, the default value `2000ms` will be used
    HttpDnsEncryptType encryptType; // Set the encryption method
    HttpDnsAddressType addressType; // Specify the type of the returned IP address, which is `HttpDnsAddressTypeAuto` by default (automatically detected by the SDK)
    NSString* routeIp; // The ECS (EDNS-Client-Subnet) value of the DNS request. By default, the HTTPDNS server will query the client's egress IP in order to query the IP for the DNS split zone. You can specify the split zone's IP address by passing in an IPv4/IPv6 address
    BOOL httpOnly;// This parameter is optional. It specifies whether to return only the DNS query result provided by HTTPDNS. `false` (default): When HTTPDNS query fails, the DNS query result provided by the local DNS will be returned. `true`: Only the DNS query result provided by HTTPDNS will be returned
    NSUInteger retryTimesBeforeSwitchServer; // Number of retries before the IP switch, which is optional and 3 by default
    NSUInteger minutesBeforeSwitchToMain; // Interval for switching back to the primary IP, which is optional and 10 minutes by default
    BOOL enableReport; // [Disused from v1.7.0] The SDK log reporting capability is configured in the console. 
} DnsConfig;

/**
 Set the basic business information (for Tencent Cloud services)

 @param config Business configuration structure
 @return YES: Set successfully. NO: Failed to set.
 */
- (BOOL) initConfig:(DnsConfig *)config;

/**
 * It is configured through `Dictionary` as for the `DnsConfig` structure. It is used for compatibility with Swift projects so that the `DnsConfig` type can be recognized in Swift projects
 *
 * @param config Configuration
 * @return YES: Set successfully. NO: Failed to set.
 */
- (BOOL) initConfigWithDictionary:(NSDictionary *)config;

/**
 // Domains for DNS prefetch. You can configure up to eight domains. DNS prefetch is triggered only during initialization.
 * Sample code: [[MSDKDns sharedInstance] WGSetPreResolvedDomains:@[@"dnspod.com", @"dnspod.cn"]];
 * @param domains  Domain array
 */
- (void) WGSetPreResolvedDomains:(NSArray *)domains;

/**
 * Domains for automatic cache update. You can configure up to eight domains.
 * Sample code: [[MSDKDns sharedInstance] WGSetKeepAliveDomains:@[@"dnspod.com", @"dnspod.cn"]];
 * @param domains  Domain array
 */
- (void) WGSetKeepAliveDomains:(NSArray *)domains;


/**
 * Set whether to enable IP address ranking. To enable it, configure the port number corresponding to the domain so that HTTPDNS dynamically ranks the resolved IP addresses and ensures that the first resolved IP address is optimal.
 * Sample code: [[MSDKDns sharedInstance] WGSetIPRankData:@{@"www.dnspod.com":@443}]; 
 */
- (void) WGSetIPRankData:(NSDictionary *)IPRankData;

/**
 * Set whether to return the IP addresses in expired DNS records of a domain. This feature is disabled by default.
 * When this parameter is set to `true`, the SDK directly returns the cached DNS result or `0` if there is no cache, and initiates an async DNS request to update the cache if there is no cached result or the cache has expired. Since the async API always returns the unexpired DNS result in the callback, the async API is unavailable when this parameter is set to `true`. In this case, we recommend you use the sync API.
 * Note: After enabling this feature, the cache will not be cleared when the network environment changes. Choose to use it based on your own business situation.
 */
- (void) WGSetExpiredIPEnabled:(BOOL)enable;

/**
 * Set whether to enable the feature of local persistent cache. It is disabled by default.
 */
- (void) WGSetPersistCacheIPEnabled:(BOOL)enable;

/**
 Sync DNS API (general)
 @param domain Domain 
 @return Array of found IPs. The `[0,0]` array will be returned if timeout (1s) occurs or no IPs are found
*/
- (NSArray *) WGGetHostByName:(NSString *) domain;

/**
 Batch sync DNS API (general)
 @param domains Domain array
 @return Dictionary of found IPs
 */
- (NSDictionary *) WGGetHostsByNames:(NSArray *) domains;

// Query a single domain
NSArray *ipsArray = [[MSDKDns sharedInstance] WGGetHostByName: @"qq.com"];
if (ipsArray && ipsArray.count > 1) {
    NSString *ipv4 = ipsArray[0];
    NSString *ipv6 = ipsArray[1];
    if (![ipv6 isEqualToString:@"0"]) {
        // TODO: When making a URL connection by using an IPv6 address, be sure to enclose the IPv6 address in square brackets, such as `http://[64:ff9b::b6fe:7475]/`
    } else if (![ipv4 isEqualToString:@"0"]){
        // Connect by using the IPv4 address
    } else {
        // `0,0` will be returned if an exception occurs. In this case, we recommend you retry once
    }
}

// Batch query domains
NSDictionary *ipsDict = [[MSDKDns sharedInstance] WGGetHostsByNames: @[@"qq.com", @"dnspod.cn"]];
NSArray *ips = [ipsDict objectForKey: @"qq.com"];
if (ips && ips.count > 1) {
    NSString *ipv4 = ips[0];
    NSString *ipv6 = ips[1];
    if (![ipv6 isEqualToString:@"0"]) {
        // TODO: When making a URL connection by using an IPv6 address, be sure to enclose the IPv6 address in square brackets, such as `http://[64:ff9b::b6fe:7475]/`
    } else if (![ipv4 isEqualToString:@"0"]){
        // Connect by using the IPv4 address
    } else {
        // `0,0` will be returned if an exception occurs. In this case, we recommend you retry once
    }
}

/**
 Async DNS API (general)
 @param domain Domain
 @param handler Array of returned IPs. The `[0,0]` array will be returned if timeout (1s) occurs or no IPs are found
 */
 - (void) WGGetHostByNameAsync:(NSString *) domain returnIps:(void (^)(NSArray *ipsArray))handler;

 /**
 Batch async DNS API (general)

 @param domains Domain array
 @param handler Dictionary of returned IPs. {"queryDomain" : [0, 0] ...} will be returned if timeout (1s) occurs or no IPs are found
 */
- (void) WGGetHostsByNamesAsync:(NSArray *) domains returnIps:(void (^)(NSDictionary * ipsDictionary))handler;