Initial 智念AIGC platform

lib/volcengine/visual-client.ts

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+import type { VisualTaskQueryResponse, VisualTaskSubmitResponse } from "@/lib/types";
+import { signVolcengineRequest } from "@/lib/volcengine/signature";
+
+export type VisualClientConfig = {
+  accessKeyId: string;
+  secretAccessKey: string;
+  region: string;
+  service: string;
+  endpoint: string;
+};
+
+export function getVisualClientConfig(): VisualClientConfig | null {
+  const accessKeyId = process.env.VOLCENGINE_ACCESS_KEY_ID;
+  const secretAccessKey = process.env.VOLCENGINE_SECRET_ACCESS_KEY;
+  if (!accessKeyId || !secretAccessKey) return null;
+  return {
+    accessKeyId,
+    secretAccessKey,
+    region: process.env.VOLCENGINE_REGION || "cn-north-1",
+    service: process.env.VOLCENGINE_SERVICE || "cv",
+    endpoint: process.env.VOLCENGINE_VISUAL_ENDPOINT || "https://visual.volcengineapi.com"
+  };
+}
+
+export function shouldMockVisualApi(): boolean {
+  const flag = process.env.JIMENG_VISUAL_MOCK || "auto";
+  if (flag === "1" || flag === "true") return true;
+  if (flag === "0" || flag === "false") return false;
+  return getVisualClientConfig() === null;
+}
+
+export async function submitVisualTask(
+  payload: Record<string, unknown>,
+  config = getVisualClientConfig()
+): Promise<VisualTaskSubmitResponse> {
+  if (!config) throw new Error("Volcengine Visual credentials are not configured.");
+  return callVisualApi<VisualTaskSubmitResponse>("CVSync2AsyncSubmitTask", payload, config);
+}
+
+export async function queryVisualTask(
+  payload: Record<string, unknown>,
+  config = getVisualClientConfig()
+): Promise<VisualTaskQueryResponse> {
+  if (!config) throw new Error("Volcengine Visual credentials are not configured.");
+  return callVisualApi<VisualTaskQueryResponse>("CVSync2AsyncGetResult", payload, config);
+}
+
+async function callVisualApi<T>(
+  action: "CVSync2AsyncSubmitTask" | "CVSync2AsyncGetResult",
+  payload: Record<string, unknown>,
+  config: VisualClientConfig
+): Promise<T> {
+  const body = JSON.stringify(payload);
+  const signed = signVolcengineRequest({
+    method: "POST",
+    endpoint: config.endpoint,
+    query: {
+      Action: action,
+      Version: "2022-08-31"
+    },
+    body,
+    accessKeyId: config.accessKeyId,
+    secretAccessKey: config.secretAccessKey,
+    region: config.region,
+    service: config.service
+  });
+  const response = await fetch(signed.url, {
+    method: "POST",
+    headers: signed.headers,
+    body
+  });
+  const text = await response.text();
+  let json: unknown;
+  try {
+    json = JSON.parse(text);
+  } catch {
+    throw new Error(`Volcengine Visual returned non-JSON response: ${response.status} ${text.slice(0, 240)}`);
+  }
+  if (!response.ok) {
+    const message = typeof json === "object" && json && "message" in json ? String(json.message) : text;
+    throw new Error(`Volcengine Visual HTTP ${response.status}: ${message}`);
+  }
+  return json as T;
+}