(improvement)(headless) Add API interface to provide data services to other applications (#561)

Co-authored-by: jolunoluo

common/src/main/java/com/tencent/supersonic/common/pojo/Pair.java

@@ -0,0 +1,24 @@
+package com.tencent.supersonic.common.pojo;
+
+public final class Pair<T, U> {
+
+    public final T first;
+    public final U second;
+
+    public Pair(T first, U second) {
+        this.second = second;
+        this.first = first;
+    }
+
+    // Because 'pair()' is shorter than 'new Pair<>()'.
+    // Sometimes this difference might be very significant (especially in a
+    // 80-ish characters boundary). Sorry diamond operator.
+    public static <T, U> Pair<T, U> pair(T first, U second) {
+        return new Pair<>(first, second);
+    }
+
+    @Override
+    public String toString() {
+        return "(" + first + ", " + second + ")";
+    }
+}

common/src/main/java/com/tencent/supersonic/common/pojo/RecordInfo.java

@@ -1,10 +1,11 @@
 package com.tencent.supersonic.common.pojo;
 
 import com.google.common.base.Objects;
-import java.util.Date;
 import lombok.Data;
 import lombok.ToString;
 
+import java.util.Date;
+
 @Data
 @ToString
 public class RecordInfo {
@@ -42,8 +43,7 @@ public class RecordInfo {
         }
         RecordInfo that = (RecordInfo) o;
         return Objects.equal(createdBy, that.createdBy) && Objects.equal(
-                updatedBy, that.updatedBy) && Objects.equal(createdAt, that.createdAt)
-                && Objects.equal(updatedAt, that.updatedAt);
+                updatedBy, that.updatedBy);
     }
 
     @Override

common/src/main/java/com/tencent/supersonic/common/pojo/enums/ApiItemType.java

@@ -0,0 +1,9 @@
+package com.tencent.supersonic.common.pojo.enums;
+
+public enum ApiItemType {
+
+    METRIC,
+    TAG,
+    DIMENSION
+
+}

common/src/main/java/com/tencent/supersonic/common/util/SignatureUtils.java

@@ -0,0 +1,71 @@
+package com.tencent.supersonic.common.util;
+
+import com.tencent.supersonic.common.pojo.Pair;
+import org.apache.commons.codec.binary.Hex;
+import javax.crypto.Mac;
+import javax.crypto.spec.SecretKeySpec;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+
+import static java.lang.Thread.sleep;
+
+public class SignatureUtils {
+
+    private static final String ALGORITHM_HMAC_SHA256 = "HmacSHA256";
+
+    private static final long TIME_OUT = 60 * 1000 * 30;
+
+    public static String generateSignature(String appKey, String appSecret, long timestamp) {
+        try {
+            Mac sha256HMAC = Mac.getInstance(ALGORITHM_HMAC_SHA256);
+            SecretKeySpec secretKey = new SecretKeySpec(appSecret.getBytes(), ALGORITHM_HMAC_SHA256);
+            sha256HMAC.init(secretKey);
+
+            String data = appKey + timestamp;
+            byte[] hash = sha256HMAC.doFinal(data.getBytes());
+
+            return Hex.encodeHexString(hash);
+        } catch (NoSuchAlgorithmException | InvalidKeyException e) {
+            throw new RuntimeException("Error generating signature", e);
+        }
+    }
+
+    public static Pair<Boolean, String> isValidSignature(String appKey, String appSecret,
+                                                         long timestamp, String signatureToCheck) {
+        long currentTimeMillis = System.currentTimeMillis();
+
+        if (currentTimeMillis < timestamp) {
+            return new Pair<>(false, "Timestamp is in the future");
+        }
+
+        if (currentTimeMillis - timestamp > TIME_OUT) {
+            return new Pair<>(false, "Timestamp is too old");
+        }
+
+        String generatedSignature = generateSignature(appKey, appSecret, timestamp);
+
+        if (generatedSignature.equals(signatureToCheck)) {
+            return new Pair<>(true, "Signature is valid");
+        } else {
+            return new Pair<>(false, "Invalid signature");
+        }
+    }
+
+    public static void main(String[] args) throws InterruptedException {
+        // appkey为申请的接口id
+        String appKey = "1";
+        //生成的密钥
+        String appSecret = "8fb44f17-f37d-4510-bb29-59b0e0b266d0";
+        long timestamp = System.currentTimeMillis();
+        System.out.println("timeStamp:" + timestamp);
+        //生成的签名
+        String serverSignature = generateSignature(appKey, appSecret, timestamp);
+        System.out.println("Server Signature: " + serverSignature);
+
+        sleep(4000);
+        //用户需要的入参
+        Pair<Boolean, String> isValid = isValidSignature(appKey, appSecret, timestamp, serverSignature);
+        System.out.println("Is Signature Valid? " + isValid.first);
+    }
+
+}