feat: 🚀

.gitignore

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+node_modules
+dist
+.wrangler
+.dev.vars
+
+# Change them to your taste:
+wrangler.toml
+package-lock.json
+yarn.lock
+pnpm-lock.yaml

README.md

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+```
+npm install
+npm run dev
+```
+
+```
+npm run deploy
+```

package.json

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+{
+  "scripts": {
+    "dev": "wrangler dev src/index.ts",
+    "deploy": "wrangler deploy --minify src/index.ts"
+  },
+  "dependencies": {
+    "@hono/zod-openapi": "^0.9.5",
+    "hono": "^3.12.6"
+  },
+  "devDependencies": {
+    "@cloudflare/workers-types": "^4.20231218.0",
+    "wrangler": "^3.22.0"
+  }
+}

src/index.ts

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+import { z, createRoute, OpenAPIHono } from "@hono/zod-openapi";
+
+type Bindings = {
+  OPENAPI_VERSION: string;
+  TOOL_VERSION: string;
+  TOOL_NAME: string;
+  TOOL_DESCRIPTION: string;
+};
+
+const app = new OpenAPIHono<{ Bindings: Bindings }>();
+
+app.doc31("/doc", (c) => ({
+  openapi: c.env.OPENAPI_VERSION,
+  info: {
+    version: c.env.TOOL_VERSION,
+    title: c.env.TOOL_NAME,
+    description: c.env.TOOL_DESCRIPTION,
+  },
+  servers: [{ url: new URL(c.req.url).origin }],
+}));
+
+const reqSchema = z.object({
+  count: z.number().openapi({ example: 1, description: "Number of quotes to get" }),
+});
+
+const resSchema = z.object({
+  result: z.string().openapi({ example: "ok" }),
+});
+
+const quoteRoute = createRoute({
+  method: "post",
+  path: "/quotes",
+  summary: "Get quotes from Breaking Bad",
+  description: "Retrieve quotes from the Breaking Bad series",
+  operationId: "GetQuotesFromBreakingBad",
+  request: {
+    body: {
+      content: {
+        "application/json": { schema: reqSchema },
+      },
+    },
+  },
+  responses: {
+    200: {
+      content: {
+        "application/json": { schema: resSchema },
+      },
+      description: "OK",
+    },
+  },
+});
+
+app.openapi(quoteRoute, async (c) => {
+  const { count } = c.req.valid("json");
+  const url = `https://api.breakingbadquotes.xyz/v1/quotes/${count}`;
+  const result = await fetch(url).then((res) => res.text());
+  return c.json({ result });
+});
+
+export default app;

tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleResolution": "node",
+    "esModuleInterop": true,
+    "strict": true,
+    "lib": [
+      "esnext"
+    ],
+    "types": [
+      "@cloudflare/workers-types"
+    ],
+    "jsx": "react-jsx",
+    "jsxImportSource": "hono/jsx"
+  },
+}

wrangler.toml.example

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+name = "dify-custom-tool"
+compatibility_date = "2023-12-01"
+
+# [vars]
+OPENAPI_VERSION = "3.1.0"
+TOOL_VERSION = "1.0.0"
+TOOL_NAME = "Dify Custom Tool"
+TOOL_DESCRIPTION = "Dify Custom Tool"
+
+# [[kv_namespaces]]
+# binding = "MY_KV_NAMESPACE"
+# id = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+# [[r2_buckets]]
+# binding = "MY_BUCKET"
+# bucket_name = "my-bucket"
+
+# [[d1_databases]]
+# binding = "DB"
+# database_name = "my-database"
+# database_id = ""