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/*
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* Copyright (c) 2023-2025, Agents-Flex (fuhai999@gmail.com).
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* <p>
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* <p>
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* http://www.apache.org/licenses/LICENSE-2.0
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* <p>
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.agentsflex.image.tencent;
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import com.agentsflex.core.image.*;
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import com.agentsflex.core.llm.client.HttpClient;
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import com.agentsflex.core.util.Maps;
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import com.alibaba.fastjson.JSON;
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import com.alibaba.fastjson.JSONArray;
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import com.alibaba.fastjson.JSONObject;
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import com.tencentcloudapi.common.DatatypeConverter;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import javax.crypto.Mac;
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import javax.crypto.spec.SecretKeySpec;
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import java.nio.charset.Charset;
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import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.text.SimpleDateFormat;
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import java.util.*;
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public class TencentImageModel implements ImageModel {
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private static final Logger LOG = LoggerFactory.getLogger(TencentImageModel.class);
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private final TencentImageModelConfig config;
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private final HttpClient httpClient = new HttpClient();
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public TencentImageModel(TencentImageModelConfig config) {
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this.config = config;
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}
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@Override
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public ImageResponse generate(GenerateImageRequest request) {
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try {
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String payload = promptToPayload(request);
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Map<String, String> headers = createAuthorizationToken("SubmitHunyuanImageJob", payload);
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String response = httpClient.post(config.getEndpoint(), headers, payload);
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JSONObject jsonObject = JSON.parseObject(response);
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JSONObject error = jsonObject.getJSONObject("Response").getJSONObject("Error");
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if (error != null && !error.isEmpty()) {
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return ImageResponse.error(error.getString("Message"));
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}
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Object jobId = jsonObject.getJSONObject("Response").get("JobId");
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if (Objects.isNull(jobId)) {
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return ImageResponse.error("response is no jobId");
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}
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String id = (String) jobId;
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return getImage(id);
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} catch (Exception e) {
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return ImageResponse.error(e.getMessage());
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}
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}
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@Override
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public ImageResponse img2imggenerate(GenerateImageRequest request) {
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return null;
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}
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@Override
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public ImageResponse edit(EditImageRequest request) {
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throw new IllegalStateException("TencentImageModel Can not support edit image.");
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}
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@Override
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public ImageResponse vary(VaryImageRequest request) {
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throw new IllegalStateException("TencentImageModel Can not support vary image.");
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}
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private static final Object LOCK = new Object();
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private ImageResponse getImage(String jobId) {
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ImageResponse imageResponse = null;
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while (true) {
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synchronized (LOCK) {
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imageResponse = callService(jobId);
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if (!Objects.isNull(imageResponse)) {
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break;
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}
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// 等待一段时间再重试
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try {
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LOCK.wait(1000);
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} catch (InterruptedException e) {
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// 线程在等待时被中断
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Thread.currentThread().interrupt();
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imageResponse = ImageResponse.error(e.toString());
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break;
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}
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}
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}
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return imageResponse;
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}
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public ImageResponse callService(String jobId) {
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try {
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String payload = Maps.of("JobId", jobId).toJSON();
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Map<String, String> headers = createAuthorizationToken("QueryHunyuanImageJob", payload);
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String resp = httpClient.post(config.getEndpoint(), headers, payload);
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JSONObject resultJson = JSONObject.parseObject(resp).getJSONObject("Response");
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JSONObject error = resultJson.getJSONObject("Error");
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if (error != null && !error.isEmpty()) {
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return ImageResponse.error(error.getString("Message"));
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}
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if (Objects.isNull(resultJson.get("JobStatusCode"))) {
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return ImageResponse.error("response is no JobStatusCode");
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}
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Integer jobStatusCode = resultJson.getInteger("JobStatusCode");
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if (Objects.equals(5, jobStatusCode)) {
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//处理完成
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if (Objects.isNull(resultJson.get("ResultImage"))) {
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return ImageResponse.error("response is no ResultImage");
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}
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JSONArray imagesArray = resultJson.getJSONArray("ResultImage");
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ImageResponse response = new ImageResponse();
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for (int i = 0; i < imagesArray.size(); i++) {
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String imageObj = imagesArray.getString(i);
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response.addImage(imageObj);
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}
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return response;
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}
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if (Objects.equals(4, jobStatusCode)) {
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//处理错误
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return ImageResponse.error(resultJson.getString("JobErrorMsg"));
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}
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} catch (Exception e) {
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return ImageResponse.error(e.getMessage());
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}
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return null;
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}
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public static String promptToPayload(GenerateImageRequest request) {
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return Maps.of("Prompt", request.getPrompt())
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.setIfNotEmpty("NegativePrompt", request.getNegativePrompt())
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.setIfNotEmpty("Style", request.getSize())
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.setIfNotEmpty("Resolution", request.getQuality())
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.setIfNotEmpty("Num", request.getN())
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.setIfNotEmpty(request.getOptions())
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.toJSON();
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}
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private final static Charset UTF8 = StandardCharsets.UTF_8;
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private final static String CT_JSON = "application/json; charset=utf-8";
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public static byte[] hmac256(byte[] key, String msg) throws Exception {
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Mac mac = Mac.getInstance("HmacSHA256");
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SecretKeySpec secretKeySpec = new SecretKeySpec(key, mac.getAlgorithm());
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mac.init(secretKeySpec);
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return mac.doFinal(msg.getBytes(UTF8));
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}
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public static String sha256Hex(String s) throws Exception {
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MessageDigest md = MessageDigest.getInstance("SHA-256");
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byte[] d = md.digest(s.getBytes(UTF8));
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return DatatypeConverter.printHexBinary(d).toLowerCase();
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}
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/**
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* @return java.util.Map<java.lang.String, java.lang.String>
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* @Author sunch
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* @Description 封装参数
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* @Date 17:34 2025/3/5
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* @Param [action, payload]
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*/
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public Map<String, String> createAuthorizationToken(String action, String payload) {
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try {
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String service = config.getService();
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String host = config.getHost();
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String version = "2023-09-01";
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String algorithm = "TC3-HMAC-SHA256";
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String timestamp = String.valueOf(System.currentTimeMillis() / 1000);
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
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// 注意时区，否则容易出错
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sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
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String date = sdf.format(new Date(Long.parseLong(timestamp + "000")));
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// ************* 步骤 1：拼接规范请求串 *************
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String httpRequestMethod = "POST";
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String canonicalUri = "/";
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String canonicalQueryString = "";
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String canonicalHeaders = "content-type:application/json; charset=utf-8\n"
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+ "host:" + host + "\n" + "x-tc-action:" + action.toLowerCase() + "\n";
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String signedHeaders = "content-type;host;x-tc-action";
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String hashedRequestPayload = sha256Hex(payload);
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String canonicalRequest = httpRequestMethod + "\n" + canonicalUri + "\n" + canonicalQueryString + "\n"
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+ canonicalHeaders + "\n" + signedHeaders + "\n" + hashedRequestPayload;
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// System.out.println(canonicalRequest);
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// ************* 步骤 2：拼接待签名字符串 *************
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String credentialScope = date + "/" + service + "/" + "tc3_request";
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String hashedCanonicalRequest = sha256Hex(canonicalRequest);
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String stringToSign = algorithm + "\n" + timestamp + "\n" + credentialScope + "\n" + hashedCanonicalRequest;
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// System.out.println(stringToSign);
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// ************* 步骤 3：计算签名 *************
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byte[] secretDate = hmac256(("TC3" + config.getApiKey()).getBytes(UTF8), date);
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byte[] secretService = hmac256(secretDate, service);
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byte[] secretSigning = hmac256(secretService, "tc3_request");
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String signature = DatatypeConverter.printHexBinary(hmac256(secretSigning, stringToSign)).toLowerCase();
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// System.out.println(signature);
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// ************* 步骤 4：拼接 Authorization *************
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String authorization = algorithm + " " + "Credential=" + config.getApiSecret() + "/" + credentialScope + ", "
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+ "SignedHeaders=" + signedHeaders + ", " + "Signature=" + signature;
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// System.out.println(authorization);
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Map<String, String> headers = new HashMap<>();
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headers.put("Authorization", authorization);
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headers.put("Content-Type", CT_JSON);
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headers.put("Host", host);
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headers.put("X-TC-Action", action);
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headers.put("X-TC-Timestamp", timestamp);
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headers.put("X-TC-Version", version);
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headers.put("X-TC-Region", config.getRegion());
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return headers;
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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}
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