Make Qwen OAuth work on Vercel

app/api/ollama/models/route.ts

@@ -0,0 +1,88 @@
+import { NextRequest, NextResponse } from "next/server";
+import { normalizeOllamaBase, DEFAULT_OLLAMA_BASE } from "../constants";
+
+const API_PREFIX = "/api";
+
+function getApiKey(request: NextRequest): string | null {
+  return request.headers.get("x-ollama-api-key");
+}
+
+function getBaseUrl(request: NextRequest): string {
+  const header = request.headers.get("x-ollama-endpoint");
+  if (header && header.trim().length > 0) {
+    return normalizeOllamaBase(header);
+  }
+  return DEFAULT_OLLAMA_BASE;
+}
+
+async function fetchModelNames(url: string, apiKey: string): Promise<string[]> {
+  const response = await fetch(`${url}`, {
+    method: "GET",
+    headers: {
+      Authorization: `Bearer ${apiKey}`,
+      Accept: "application/json",
+    },
+  });
+
+  if (!response.ok) {
+    const errorText = await response.text().catch(() => "Failed to parse");
+    throw new Error(`${response.status} ${response.statusText} - ${errorText}`);
+  }
+
+  const json = await response.json().catch(() => null);
+  const candidates = Array.isArray(json?.models)
+    ? json.models
+    : Array.isArray(json?.data)
+    ? json.data
+    : Array.isArray(json)
+    ? json
+    : [];
+
+  const names: string[] = [];
+  for (const entry of candidates) {
+    if (!entry) continue;
+    const name = entry.name || entry.model || entry.id;
+    if (typeof name === "string" && name.length > 0) {
+      names.push(name);
+    }
+  }
+
+  return names;
+}
+
+export async function GET(request: NextRequest) {
+  const apiKey = getApiKey(request);
+  if (!apiKey) {
+    return NextResponse.json(
+      { error: "Ollama API key is required" },
+      { status: 401 }
+    );
+  }
+
+  const baseUrl = getBaseUrl(request);
+  const primaryUrl = `${baseUrl}${API_PREFIX}/v1/models`;
+  const fallbackUrl = `${baseUrl}${API_PREFIX}/tags`;
+
+  try {
+    const primaryModels = await fetchModelNames(primaryUrl, apiKey);
+    if (primaryModels.length > 0) {
+      return NextResponse.json({ models: primaryModels });
+    }
+  } catch (error) {
+    console.warn("[Ollama] Primary model fetch failed:", error);
+  }
+
+  try {
+    const fallbackModels = await fetchModelNames(fallbackUrl, apiKey);
+    if (fallbackModels.length > 0) {
+      return NextResponse.json({ models: fallbackModels });
+    }
+  } catch (error) {
+    console.warn("[Ollama] Fallback model fetch failed:", error);
+  }
+
+  return NextResponse.json(
+    { models: [] },
+    { status: 502 }
+  );
+}