Server/Web API for RK3588 NPU LLM

Update: there is now a web UI available: https://github.com/av1d/NPU-Chat/

The goal is to make LLMs running on the NPU practical and usable as I'm not a fan of the CLI interactions due to their limited usability. The server outputs a JSON response and therefore you can use cURL, AJAX, Python, or whatever you want.

Currently only works with Qwen.

First, install ezrknpu from Pelochus if you haven't yet:
https://github.com/Pelochus/ezrknpu
Side note: Parts of this server are borrowed from the original ezrknn-llm/rkllm-runtime/example/src/main.cpp file from that repo.

Next, install Boost:
sudo apt install libboost-all-dev libcpprest-dev

Test Boost. Put this in a file named test.cpp:

#include <iostream>
#include <boost/version.hpp>

int main() {
    std::cout << "Using Boost " << BOOST_VERSION / 100000 << "."  // major version
              << BOOST_VERSION / 100 % 1000 << "."  // minor version
              << BOOST_VERSION % 100  // patch level
              << std::endl;
    return 0;
}

Compile: g++ test.cpp
Run test: ./a.out
Result should give you something like "Using Boost 1.74.0"
If not, RTFM: https://www.boost.org/doc/libs/1_74_0/

Compile server.cpp. Change the path to rkllmrt if needed.
Note: use server.cpp for models converted with RKLLM 1.0.1 and server_1_0.cpp for models converted with RKLLM 1.0.
If you have locate installed, try locate rkllmrt.
The path in the following command is probably correct, though:
g++ server.cpp -o server -std=c++11 -lcpprest -lcrypto -L/usr/lib -lrkllmrt

Finally, you have a file named server in the current working directory.
Syntax is: IP, port, path to model. Start it:
./server 192.168.0.196 31337 ../qwen-1_8B-rk3588/qwen-chat-1_8B.rkllm

Test it. Change the value of "hello, how are you " if you like then send it.
curl -H "Content-Type: application/json" -d '{"PROMPT_TEXT_PREFIX":"<|im_start|>system You are a helpful assistant. <|im_end|> <|im_start|>user ","input_str":"hello, how are you ","PROMPT_TEXT_POSTFIX":"<|im_end|><|im_start|>assistant "}' http://192.168.0.196:31337/

implement it in PHP:

<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://192.168.0.196:31337/');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/json',
]);
curl_setopt($ch, CURLOPT_POSTFIELDS, '{"PROMPT_TEXT_PREFIX":"<|im_start|>system You are a helpful assistant. <|im_end|> <|im_start|>user ","input_str":"hello, how are you ","PROMPT_TEXT_POSTFIX":"<|im_end|><|im_start|>assistant "}');

$response = curl_exec($ch);

curl_close($ch);

var_dump($response);

jQuery:

$.ajax({
  url: 'http://192.168.0.196:31337/',
  crossDomain: true,
  method: 'post',
  contentType: 'application/json',
  data: JSON.stringify({
    'PROMPT_TEXT_PREFIX': '<|im_start|>system You are a helpful assistant. <|im_end|> <|im_start|>user ',
    'input_str': 'hello, how are you ',
    'PROMPT_TEXT_POSTFIX': '<|im_end|><|im_start|>assistant '
  })
}).done(function(response) {
  console.log(response);
});

Parts of this software taken from ezrknn-llm/rkllm-runtime/example/src/main.cpp are covered by the Apache License:

Copyright (c) 2024 by Rockchip Electronics Co., Ltd. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Everything else falls under the MIT license.

Do not run this server in a production environment. It is lacking sanitization and security features.
Shouts to r/RockchipNPU, check it out!