节点自动升级功能之前的版本

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2026-03-02 23:42:55 +08:00
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# HTTPDNS SDK 集成文档Android
## 1. 版本与依赖
- SDK 模块:`EdgeHttpDNS/sdk/android/httpdns-sdk`
- `minSdkVersion`19
- `targetSdkVersion`33
- `compileSdk`33
将发布包中的 `jar/aar` 放到应用模块 `libs/`,在 `app/build.gradle` 中添加:
```gradle
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar', '*.aar'])
implementation 'androidx.appcompat:appcompat:1.6.1'
}
```
## 2. SNI 行为说明(关键)
当前 SDK 行为与代码一致:
1. `/resolve` 请求链路SDK -> 你的 HTTPDNS 服务域名)
- 走域名 HTTPS
- 默认 TLS 行为(会带 SNI
2. 业务请求链路(拿到 CDN IP 后发起业务 HTTPS
- 使用 `HttpDnsHttpAdapter`:按 IP 建连,`Host` 保留原域名,并清空 SNINo-SNI
## 3. 初始化 SDK推荐用 V1 客户端)
### Kotlin
```kotlin
import com.new.sdk.android.httpdns.HttpDnsV1Client
import com.new.sdk.android.httpdns.HttpDnsService
val service: HttpDnsService = HttpDnsV1Client.init(
context = applicationContext,
appId = "your-app-id",
primaryServiceHost = "httpdns.example.com",
backupServiceHost = "httpdns-backup.example.com", // 可空字符串
servicePort = 443,
signSecret = "your-sign-secret" // 可空字符串
)
```
### Java
```java
import com.new.sdk.android.httpdns.HttpDnsService;
import com.new.sdk.android.httpdns.HttpDnsV1Client;
HttpDnsService service = HttpDnsV1Client.init(
getApplicationContext(),
"your-app-id",
"httpdns.example.com",
"httpdns-backup.example.com", // 可传 ""
443,
"your-sign-secret" // 可传 ""
);
```
## 4. 解析域名获取 CDN IP
### Kotlin
```kotlin
import com.new.sdk.android.httpdns.HTTPDNSResult
val result: HTTPDNSResult = HttpDnsV1Client.resolveHost(
service = service,
host = "api.example.com",
qtype = "A", // "A" 或 "AAAA"
cip = null // 可选,客户端 IP 透传
)
val ips = result.ips ?: emptyArray()
```
### Java
```java
import com.new.sdk.android.httpdns.HTTPDNSResult;
HTTPDNSResult result = HttpDnsV1Client.resolveHost(
service,
"api.example.com",
"A",
null
);
String[] ips = result.getIps();
```
## 5. 业务请求接入方式
#使用 `HttpDnsHttpAdapter`IP 直连 + No-SNI
业务请求侧做“隐匿 SNI”。该适配器仅支持 HTTPS URL。
```kotlin
import com.new.sdk.android.httpdns.HttpDnsV1Client
import com.new.sdk.android.httpdns.network.HttpDnsAdapterOptions
import com.new.sdk.android.httpdns.network.HttpDnsAdapterRequest
val adapter = HttpDnsV1Client.buildHttpClientAdapter(
service,
HttpDnsAdapterOptions.Builder()
.setConnectTimeoutMillis(3000)
.setReadTimeoutMillis(5000)
.setRequestIpType(com.new.sdk.android.httpdns.RequestIpType.auto)
.build()
)
val req = HttpDnsAdapterRequest(
"GET",
"https://api.example.com/path?x=1"
)
val resp = adapter.execute(req)
val code = resp.statusCode
val bodyBytes = resp.body
val usedIp = resp.usedIp
```
## 6. 预解析与常用接口
```kotlin
service.setPreResolveHosts(listOf("api.example.com", "img.example.com"))
val r1 = service.getHttpDnsResultForHostSync("api.example.com", com.new.sdk.android.httpdns.RequestIpType.auto)
val r2 = service.getHttpDnsResultForHostSyncNonBlocking("api.example.com", com.new.sdk.android.httpdns.RequestIpType.auto)
```
- `Sync`:允许阻塞等待刷新结果(上限受 timeout 等配置影响)
- `NonBlocking`:快速返回当前可用缓存/结果,不阻塞等待
## 7. 验证建议
1. 验证 `/resolve`
- 抓包看目标应为 `https://<serviceHost>:<servicePort>/resolve...`
2. 验证业务请求(若使用 `HttpDnsHttpAdapter`
- 目标地址应是 CDN IP
- HTTP `Host` 应为原域名
- TLS ClientHello 不应携带 SNINo-SNI
## 8. 混淆配置
```proguard
-keep class com.new.sdk.android.** { *; }
```
## 9. 常见问题
1. HTTPDNS 没生效
- 检查是否真正使用了 SDK 返回 IP或用了 `HttpDnsHttpAdapter`
- 检查失败回退逻辑是否总是直接走了系统 DNS
2. 使用 `HttpDnsHttpAdapter` 仍失败
- 只支持 HTTPS URL
3. 线上不要开启不安全证书
- `HttpDnsAdapterOptions.Builder#setAllowInsecureCertificatesForDebugOnly(true)` 仅限调试环境