Full Code of michaelliao/remote-code-runner for AI

Repository: michaelliao/remote-code-runner
Branch: master
Commit: 9aa5d154f366
Files: 8
Total size: 29.4 KB

Directory structure:
gitextract_20f7fthz/

├── .gitignore
├── LICENSE
├── README.md
├── generate.py
└── src/
    ├── config.json
    ├── nginx-proxy-sample.conf
    ├── runner.py
    └── start-runner.sh

================================================
FILE CONTENTS
================================================

================================================
FILE: .gitignore
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# Docker.gitignore #

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================================================
FILE: LICENSE
================================================
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================================================
FILE: README.md
================================================
# Remote Code Runner

Remote Code Runner is a simple code service for running code on remote server side. Docker is used to execute untrusted code in a sandbox environment.

# Install

Environment:

- Ubuntu Linux 18.04
- Docker 19.x
- Python 3.8

MAKE SURE the login user has `sudo` privileges and does not require entering a password.

Install all required software:

```
$ sudo apt install git docker.io python3.8
```

Get source:

```
$ cd /srv
$ sudo git clone https://github.com/michaelliao/remote-code-runner.git
```

Generate all from source:

```
$ cd /srv/remote-code-runner
$ sudo python3.8 generate.py
```

Download required docker images by warm up script (this may take a long time):

```
$ cd /srv/remote-code-runner/bin
$ sudo sh warm-up-docker.sh
```

Start server:

```
$ cd /srv/remote-code-runner/bin
$ sudo start-runner.sh
```

# Usage

Using simple HTTP JSON API:

```
$ curl http://server-ip:8080/run -H 'Content-Type: application/json' -d '{"language":"python","code":"import math\nprint(math.pi)"}'
{"error": false, "timeout": false, "truncated": false, "output": "3.141592653589793\n"}
```

API input:

- language: language name, lowercase: `java`, `python`, `ruby`.
- code: language code as JSON string: `import math\nprint(math.pi)`

API output:

- timeout: boolean, is execution timeout.
- error: boolean, is error output. e.g. compile failed or syntax error.
- truncated: boolean, is output was truncated for too many characters.
- output: string, the output of execution.

# Execution

How code are executed on the remote server side:

1. Http server `runner.py` got language name and code from API;
2. Write code into a temperary directory like `/tmp/remote-code-runner/1`;
3. Execute command like `sudo docker run -t --rm -w /app -v /tmp/dir:/app <image-tag> python3 main.py`;
4. Write output into API response;
5. Clean up temperary directory.

# Limitation

- Multiple files are not supported.
- There is no way to read input from console. Any user input code will cause timeout.

# Security

Remote code runner should only be served in private network. User identity check, rate limit must be done in application server or reverse proxy like Nginx.

# Extension

How to add a new language:

1. Add configuration in `config.json`:

```
{
    ...
    "languages": {
        ...
        "node": {
            "file": "main.js",
            "image": "node:14.17-slim",
            "command": "node main.js"
        }
    }
}
```

The key `node` is the language name.

2. Make sure image is downloaded on local:

```
$ sudo docker run -t --rm node:13.12-slim ls
```

3. Restart `start-runner.sh`.


================================================
FILE: generate.py
================================================
#!/usr/bin/env python3
# -*- coding: utf-8 -*-

'a remote code running service tool'

import os, sys, json, subprocess

def main():
    cwd = os.path.dirname(os.path.normpath(os.path.abspath(__file__)))
    print('Set remote code runner path = %s' % cwd)
    print('Check system requirement:')
    run('sudo docker -v', 'Try install docker by command: sudo apt install docker.io')
    run('sudo python3.8 --version', 'Try install python 3.8 by command: sudo apt install python3.8')
    settings = {}
    settings['$RCR_PATH'] = cwd
    settings['$RCR_IP'] = getInput('Remote code runner listening IP', '127.0.0.1')
    settings['$RCR_PORT'] = getInput('Remote code runner listening port', '8080')
    settings['$RCR_TIMEOUT'] = getInput('Remote code runner execution timeout in seconds', '5')
    settings['$RCR_TEMP'] = getInput('Remote code runner temporary directory', '/tmp/remote-code-runner')
    yn = input('Generate release? [yN] ')
    if yn.lower() != 'y':
        exit(1)
    print('generate config.json...')
    generateFile(cwd, 'src/config.json', 'bin/config.json', settings)
    print('copy runner.py...')
    generateFile(cwd, 'src/runner.py', 'bin/runner.py', settings)
    print('generate start-runner.sh...')
    generateFile(cwd, 'src/start-runner.sh', 'bin/start-runner.sh', settings)
    print('generate warm-up-docker.sh...')
    warmUps = []
    configJson = json.loads(readFile(cwd, 'src/config.json'))
    for lang, conf in configJson['languages'].items():
        warmUps.append('echo ">>> sudo docker run -t --rm %s ls"' % conf['image'])
        warmUps.append('sudo docker run -t --rm %s ls' % conf['image'])
    writeFile(cwd, 'bin/warm-up-docker.sh', '\n'.join(warmUps))

def run(cmd, msgOnError=''):
    print('[execute] %s' % cmd)
    code = subprocess.call(cmd, shell=True)
    if code != 0:
        print(msgOnError)
        exit(1)

def getInput(prompt, default=None):
    if default:
        s = input('%s [%s]: ' % (prompt, default)).strip()
        if s == '':
            s = default
        return s
    else:
        s = input('%s: ' % prompt).strip()
        return s

def generateFile(cwd, source, dest, settings):
    content = readFile(cwd, source)
    content = replaceAll(content, settings)
    writeFile(cwd, dest, content)

def readFile(cwd, fname):
    with open(os.path.join(cwd, fname), 'r', encoding='utf-8') as f:
        return f.read()

def writeFile(cwd, fname, content):
    with open(os.path.join(cwd, fname), 'w', encoding='utf-8') as f:
        f.write(content)

def replaceAll(s, settings):
    for k, v in settings.items():
        s = s.replace(k, v)
    return s

if __name__ == '__main__':
    main()


================================================
FILE: src/config.json
================================================
{
    "ip": "$RCR_IP",
    "port": "$RCR_PORT",
    "tempdir": "$RCR_TEMP",
    "docker": "docker run -t --rm --cpus=1 --network none -w /app -v %s:/app %s %s",
    "timeout": "$RCR_TIMEOUT",
    "languages": {
        "java": {
            "file": "Main.java",
            "image": "openjdk:16-slim",
            "command": "java -Xmx48m --source 16 --enable-preview -XX:+ShowCodeDetailsInExceptionMessages Main.java"
        },
        "python": {
            "file": "main.py",
            "image": "python:3.9-slim",
            "command": "python3 -B main.py"
        },
        "ruby": {
            "file": "main.rb",
            "image": "ruby:2.7-slim",
            "command": "ruby main.rb"
        },
        "node": {
            "file": "main.js",
            "image": "node:14.17-slim",
            "command": "node main.js"
        },
        "c": {
            "file": "main.c",
            "image": "gcc:9.3",
            "command": "gcc -Wall -o main main.c && ./main"
        }
    }
}


================================================
FILE: src/nginx-proxy-sample.conf
================================================
#
# NGINX CONFIGURATION
#

upstream rcr_upstream {
	server 127.0.0.1:80 fail_timeout=10s;
}

server {

	listen 80;

	server_name _;

	root       /var/www/html;
	access_log /var/log/nginx/remote_code_runner_access.log;
	error_log  /var/log/nginx/remote_code_runner_error.log;

	client_max_body_size 2m;

	gzip            on;
	gzip_min_length 1024;
	gzip_buffers    4 8k;
	gzip_types      text/css application/x-javascript application/json;

	location / {
		proxy_pass         http://rcr_upstream;
		proxy_set_header   Host $host;
		proxy_read_timeout 10s;
	}
}


================================================
FILE: src/runner.py
================================================
#!/usr/bin/env python3
# -*- coding: utf-8 -*-

'a remote code running service'

import os, sys, time, json, shutil, subprocess, threading
from urllib import parse
from http.server import ThreadingHTTPServer, BaseHTTPRequestHandler

class Dict(dict):
    def __init__(self, **kw):
        super().__init__(**kw)

    def __getattr__(self, key):
        try:
            return self[key]
        except KeyError:
            raise AttributeError(r"'Dict' object has no attribute '%s'" % key)

    def __setattr__(self, key, value):
        self[key] = value

def configHook(d):
    kw = dict()
    for k, v in d.items():
        if isinstance(v, str):
            kw[k] = os.path.expandvars(v)
        else:
            kw[k] = v
    return Dict(**kw)

APP_DIR = os.path.dirname(os.path.normpath(os.path.abspath(__file__)))

with open(os.path.join(APP_DIR, 'config.json'), 'r', encoding='utf-8') as f:
    CONFIG = json.load(f, object_hook=configHook)

print('load config:\n%s' % json.dumps(CONFIG, indent=4))

HTML_INDEX = '''
<html>
    <head>
        <title>Remote Code Runner</title>
        <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
        <script>
            $(function () {
                $('#codeForm').submit(function (e) {
                    e.preventDefault();
                    $('#timeout').text('');
                    $('#response').text('');
                    var data = {
                        language: $('#language').val(),
                        code: $('#code').val()
                    };
                    $.ajax({
                        type: 'POST',
                        url: '/run',
                        data: JSON.stringify(data),
                        contentType: 'application/json',
                        dataType: 'json',
                        success: function (resp) {
                            $('#timeout').text(resp.timeout);
                            $('#response').text(resp.output==='' ? '(EMPTY)' : resp.output);
                        },
                        error: function (jqXHR, status, err) {
                            $('#response').text('ERROR: ' + status);
                        }
                    });
                });
            });
        </script>
    </head>
    <body>
        <form id="codeForm" action="/run">
            <p><select id="language" name="language">
''' + ''.join(sorted(['<option value="%s">%s</option>' % (lang, lang.capitalize()) for lang in CONFIG.languages.keys()])) + '''
            </select></p>
            <textarea id="code" name="code" style="width:90%;height:300px"></textarea>
            <p><button type="submit">Run</button></p>
        </form>
        <p>Timeout: <span id="timeout" style="color:red"></span></p>
        <p>Response:</p>
        <pre><code id="response"></code></pre>
    </body>
</html>
'''

globalIdCounter = 0
globalIdCounterLock = threading.Lock()

def nextId():
    global globalIdCounter
    with globalIdCounterLock:
        globalIdCounter += 1
        return globalIdCounter

def run(cmd, cwd, timeout):
    result = dict(error=False, timeout=False, truncated=False, output='')
    try:
        output = subprocess.check_output(cmd.split(' '), cwd=cwd, stderr=subprocess.STDOUT, timeout=timeout)
        output = decode(output)
        if len(output) > 4000:
            result['output'] = output[:4000]
            result['truncated'] = True
        else:
            result['output'] = output
    except subprocess.TimeoutExpired:
        result['timeout'] = True
    except subprocess.CalledProcessError as e:
        result['error'] = True
        result['output'] = decode(e.output)
    return result

def decode(s):
    try:
        return s.decode('utf-8')
    except UnicodeDecodeError:
        return s.decode('gbk')

class RunnerHTTPRequestHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        if self.path == '/':
            self.sendResponse(HTML_INDEX, 'text/html')
        elif self.path == '/health':
            self.sendResponse(b'{"status":"UP"}')
        else:
            self.responseError(404)

    def do_POST(self):
        if self.path != '/run':
            return self.responseError(404)
        body = json.loads(self.rfile.read(int(self.headers['Content-Length'])).decode('utf-8'))
        lang = body['language']
        code = body['code']
        if not lang in CONFIG.languages:
            raise KeyError('language not found: ' + lang)
        start = time.time()
        print('[%s] prepare...' % lang)
        tempDir = self.createTempDir()
        print('[%s] create temp dir: %s' % (lang, tempDir))
        try:
            cfg = CONFIG.languages[lang]
            tempFile = os.path.join(tempDir, cfg.file)
            with open(tempFile, 'w', encoding='utf-8') as f:
                f.write(code)
            print('[%s] write file: %s' % (lang, tempFile))
            # execute:
            cmd = 'timeout %s %s' % (CONFIG.timeout, cfg.command)
            if 'docker' in CONFIG:
                img = cfg.image
                cmd = CONFIG.docker % (tempDir, img, cmd)
            print('[%s] command: %s' % (lang, cmd))
            result = run(cmd, tempDir, int(CONFIG.timeout))
        finally:
            shutil.rmtree(tempDir)
            print('[%s] remove temp dir: %s' % (lang, tempDir))
            print('[%s] executed in %s.' % (lang, time.time() - start))
        self.sendResponse(result)

    def responseError(self, errorCode, body=None):
        self.close_connection = True
        self.send_response(errorCode)
        if body:
            data = self.toJsonBytes(body)
            self.send_header('Content-Type')
            self.send_header('Content-Length', str(len(data)))
            self.end_headers()
            self.wfile.write(data)

    def sendResponse(self, body, contentType='application/json'):
        data = self.toJsonBytes(body)
        self.close_connection = True
        self.send_response(200)
        self.send_header('Content-Type', contentType)
        self.send_header('Content-Length', str(len(data)))
        self.end_headers()
        self.wfile.write(data)

    def toJsonBytes(self, data):
        if isinstance(data, bytes):
            return data
        elif isinstance(data, str):
            return data.encode('utf-8')
        else:
            return json.dumps(data).encode('utf-8')

    def createTempDir(self):
        dirName = str(nextId())
        fp = os.path.join(CONFIG.tempdir, dirName)
        os.mkdir(fp)
        return fp

    def writeTempFile(self, path, content):
        with open(os.path.join(path, filename), 'w', encoding='utf-8') as f:
            f.write(content)

def main():
    print('Prepare temporary dir %s for code runner...' % CONFIG.tempdir)
    if not os.path.isdir(CONFIG.tempdir):
        os.makedirs(CONFIG.tempdir)
    httpd = ThreadingHTTPServer((CONFIG.ip, int(CONFIG.port)), RunnerHTTPRequestHandler)
    print('Ready for code runner on %s:%s...' % (CONFIG.ip, CONFIG.port))
    print('Press Ctrl + C to exit...')
    httpd.serve_forever()

if __name__ == '__main__':
    main()


================================================
FILE: src/start-runner.sh
================================================
#!/bin/bash

cd "$(dirname "$0")"
sudo nohup python3.8 runner.py > ./output.log 2>&1 </dev/null &