sglang/docs/start/send_request.ipynb

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  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Quick Start: Sending Requests\n",
    "\n",
    "This notebook provides a quick-start guide for using SGLang after installation."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Launch a server\n",
    "\n",
    "This code block is equivalent to executing \n",
    "\n",
    "```bash\n",
    "python -m sglang.launch_server --model-path meta-llama/Meta-Llama-3.1-8B-Instruct \\\n",
    "--port 30000 --host 0.0.0.0\n",
    "```\n",
    "\n",
    "in your terminal and wait for the server to be ready. Once the server is running, you can send test requests using curl or requests. The server implements the [OpenAI-compatible API](https://platform.openai.com/docs/api-reference/chat)."
   ]
  },
  {
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     "shell.execute_reply": "2024-11-01T02:46:42.809147Z"
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   "outputs": [],
   "source": [
    "from sglang.utils import (\n",
    "    execute_shell_command,\n",
    "    wait_for_server,\n",
    "    terminate_process,\n",
    "    print_highlight,\n",
    ")\n",
    "\n",
    "server_process = execute_shell_command(\n",
    "\"\"\"\n",
    "python -m sglang.launch_server --model-path meta-llama/Meta-Llama-3.1-8B-Instruct \\\n",
    "--port 30000 --host 0.0.0.0\n",
    "\"\"\"\n",
    ")\n",
    "\n",
    "wait_for_server(\"http://localhost:30000\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Using cURL\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import subprocess, json\n",
    "\n",
    "curl_command = \"\"\"\n",
    "curl -s http://localhost:30000/v1/chat/completions \\\n",
    "  -d '{\"model\": \"meta-llama/Meta-Llama-3.1-8B-Instruct\", \"messages\": [{\"role\": \"system\", \"content\": \"You are a helpful assistant.\"}, {\"role\": \"user\", \"content\": \"What is a LLM?\"}]}'\n",
    "\"\"\"\n",
    "\n",
    "response = json.loads(subprocess.check_output(curl_command, shell=True))\n",
    "print_highlight(response)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Using OpenAI Compatible API w/ Requests"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
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     "shell.execute_reply": "2024-11-01T02:46:51.435965Z"
    }
   },
   "outputs": [],
   "source": [
    "import requests\n",
    "\n",
    "url = \"http://localhost:30000/v1/chat/completions\"\n",
    "\n",
    "data = {\n",
    "    \"model\": \"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "    \"messages\": [\n",
    "        {\"role\": \"system\", \"content\": \"You are a helpful assistant.\"},\n",
    "        {\"role\": \"user\", \"content\": \"What is a LLM?\"}\n",
    "    ]\n",
    "}\n",
    "\n",
    "response = requests.post(url, json=data)\n",
    "print_highlight(response.json())"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Using OpenAI Python Client\n",
    "\n",
    "You can also use the OpenAI Python API library to send requests."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
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    }
   },
   "outputs": [],
   "source": [
    "import openai\n",
    "\n",
    "client = openai.Client(base_url=\"http://127.0.0.1:30000/v1\", api_key=\"None\")\n",
    "\n",
    "response = client.chat.completions.create(\n",
    "    model=\"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "    messages=[\n",
    "        {\"role\": \"system\", \"content\": \"You are a helpful AI assistant\"},\n",
    "        {\"role\": \"user\", \"content\": \"List 3 countries and their capitals.\"},\n",
    "    ],\n",
    "    temperature=0,\n",
    "    max_tokens=64,\n",
    ")\n",
    "print_highlight(response)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Using Native Generation APIs\n",
    "\n",
    "You can also use the native `/generate` endpoint with requests, which provides more flexiblity. An API reference is available at [Sampling Parameters](https://sgl-project.github.io/references/sampling_params.html)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import requests\n",
    "\n",
    "response = requests.post(\n",
    "    \"http://localhost:30000/generate\",\n",
    "    json={\n",
    "        \"text\": \"The capital of France is\",\n",
    "        \"sampling_params\": {\n",
    "            \"temperature\": 0,\n",
    "            \"max_new_tokens\": 32,\n",
    "        },\n",
    "    },\n",
    ")\n",
    "\n",
    "print_highlight(response.json())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "execution": {
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   },
   "outputs": [],
   "source": [
    "terminate_process(server_process)"
   ]
  }
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