Deno•3y ago•

6 replies

Connection refused when creating a local API server

Ooker · 2024-01-02T14:43:22.255Z

I'm following [Simple API server | Deno Docs](https://docs.deno.com/deploy/tutorials/simple-api "Simple API server | Deno Docs"): 1. Create `server.ts`: ```typescript const kv = await Deno.openKv(); Deno.serve(async (request: Request) => { // Create short links if (request.method == "POST") { const body = await request.text(); const { slug, url } = JSON.parse(body); const result = await kv.set(["links", slug], url); return new Response(JSON.stringify(result)); } // Redirect short links const slug = request.url.split("/").pop() || ""; const url = (await kv.get(["links", slug])).value as string; if (url) { return Response.redirect(url, 301); } else { const m = !slug ? "Please provide a slug." : `Slug "${slug}" not found`; return new Response(m, { status: 404 }); } }); ``` 2. Run `deno run -A --unstable server.ts`. The site says "Please provide a slug" 3. Run: ```PowerShell curl --header "Content-Type: application/json" --request POST --data '{"url":"https://docs.deno.com/runtime/manual","slug":"denodocs"}' http://localhost:8000/ ``` I get this error: ``` curl: (7) Failed to connect to localhost port 8000 after 0 ms: Connection refused ``` [Searching for the error](https://stackoverflow.com/q/35978180/3416774), I think I need to replace `localhost` with `127.0.0.1`: ```PowerShell curl --header "Content-Type: application/json" --request POST --data '{"url":"https://docs.deno.com/runtime/manual","slug":"denodocs"}' http://127.0.0.1:8000/ ``` This doesn't help either. In my understanding, it should return ```json { "ok": true, "versionstamp": "00000000000000060000" } ``` Do you know what goes wrong? ([Also asked on Stack OVerflow](https://stackoverflow.com/q/77746532/3416774))

I'm following Simple API server | Deno Docs:
1. Create

server.ts

server.ts

server.ts

server.ts:

const kv = await Deno.openKv();

Deno.serve(async (request: Request) => {
  // Create short links
  if (request.method == "POST") {
    const body = await request.text();
    const { slug, url } = JSON.parse(body);
    const result = await kv.set(["links", slug], url);
    return new Response(JSON.stringify(result));
  }

  // Redirect short links
  const slug = request.url.split("/").pop() || "";
  const url = (await kv.get(["links", slug])).value as string;
  if (url) {
    return Response.redirect(url, 301);
  } else {
    const m = !slug ? "Please provide a slug." : `Slug "${slug}" not found`;
    return new Response(m, { status: 404 });
  }
});

const kv = await Deno.openKv();

Deno.serve(async (request: Request) => {
  // Create short links
  if (request.method == "POST") {
    const body = await request.text();
    const { slug, url } = JSON.parse(body);
    const result = await kv.set(["links", slug], url);
    return new Response(JSON.stringify(result));
  }

  // Redirect short links
  const slug = request.url.split("/").pop() || "";
  const url = (await kv.get(["links", slug])).value as string;
  if (url) {
    return Response.redirect(url, 301);
  } else {
    const m = !slug ? "Please provide a slug." : `Slug "${slug}" not found`;
    return new Response(m, { status: 404 });
  }
});

const kv = await Deno.openKv();

Deno.serve(async (request: Request) => {
  // Create short links
  if (request.method == "POST") {
    const body = await request.text();
    const { slug, url } = JSON.parse(body);
    const result = await kv.set(["links", slug], url);
    return new Response(JSON.stringify(result));
  }

  // Redirect short links
  const slug = request.url.split("/").pop() || "";
  const url = (await kv.get(["links", slug])).value as string;
  if (url) {
    return Response.redirect(url, 301);
  } else {
    const m = !slug ? "Please provide a slug." : `Slug "${slug}" not found`;
    return new Response(m, { status: 404 });
  }
});

const kv = await Deno.openKv();

Deno.serve(async (request: Request) => {
  // Create short links
  if (request.method == "POST") {
    const body = await request.text();
    const { slug, url } = JSON.parse(body);
    const result = await kv.set(["links", slug], url);
    return new Response(JSON.stringify(result));
  }

  // Redirect short links
  const slug = request.url.split("/").pop() || "";
  const url = (await kv.get(["links", slug])).value as string;
  if (url) {
    return Response.redirect(url, 301);
  } else {
    const m = !slug ? "Please provide a slug." : `Slug "${slug}" not found`;
    return new Response(m, { status: 404 });
  }
});

2. Run

deno run -A --unstable server.ts

deno run -A --unstable server.ts

deno run -A --unstable server.ts

deno run -A --unstable server.ts. The site says "Please provide a slug"
3. Run:

curl --header "Content-Type: application/json" --request POST --data '{"url":"https://docs.deno.com/runtime/manual","slug":"denodocs"}' http://localhost:8000/

curl --header "Content-Type: application/json" --request POST --data '{"url":"https://docs.deno.com/runtime/manual","slug":"denodocs"}' http://localhost:8000/

curl --header "Content-Type: application/json" --request POST --data '{"url":"https://docs.deno.com/runtime/manual","slug":"denodocs"}' http://localhost:8000/

curl --header "Content-Type: application/json" --request POST --data '{"url":"https://docs.deno.com/runtime/manual","slug":"denodocs"}' http://localhost:8000/

I get this error:

curl: (7) Failed to connect to localhost port 8000 after 0 ms: Connection refused

curl: (7) Failed to connect to localhost port 8000 after 0 ms: Connection refused

curl: (7) Failed to connect to localhost port 8000 after 0 ms: Connection refused

curl: (7) Failed to connect to localhost port 8000 after 0 ms: Connection refused

Searching for the error, I think I need to replace

localhost

localhost

localhost

localhost with

127.0.0.1

127.0.0.1

127.0.0.1

127.0.0.1:

curl --header "Content-Type: application/json"   --request POST   --data '{"url":"https://docs.deno.com/runtime/manual","slug":"denodocs"}'   http://127.0.0.1:8000/

curl --header "Content-Type: application/json"   --request POST   --data '{"url":"https://docs.deno.com/runtime/manual","slug":"denodocs"}'   http://127.0.0.1:8000/

curl --header "Content-Type: application/json"   --request POST   --data '{"url":"https://docs.deno.com/runtime/manual","slug":"denodocs"}'   http://127.0.0.1:8000/

curl --header "Content-Type: application/json"   --request POST   --data '{"url":"https://docs.deno.com/runtime/manual","slug":"denodocs"}'   http://127.0.0.1:8000/

This doesn't help either.

In my understanding, it should return

{ "ok": true, "versionstamp": "00000000000000060000" }

{ "ok": true, "versionstamp": "00000000000000060000" }

{ "ok": true, "versionstamp": "00000000000000060000" }

{ "ok": true, "versionstamp": "00000000000000060000" }

Do you know what goes wrong?
(Also asked on Stack OVerflow)

Simple API server | Deno Docs

Deno is great for creating simple, light-weight API servers. Learn how to create

Stack Overflow

curl (7): Failed to connect to localhost port 8000: Connection refused

Hello I am testing the endpoint and when I run php testing.php I get this error. Any help would be appreciated it.

Fatal error: Uncaught exception 'Guzzle\Http\Exception\CurlException' with

Stack Overflow

Connection refused when creating a local API server

I'm following Simple API server | Deno Docs:

Create server.ts:

const kv = await Deno.openKv();

Deno.serve(async (request: Request) => {
// Create short links
if (request.method == "P...

Connection refused when creating a local API server

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