220 lines
6.6 KiB
JavaScript
220 lines
6.6 KiB
JavaScript
/**
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* C 代码编译运行后端服务
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* 接收 C 代码 → 编译 → 运行 → 返回输出
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*/
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const express = require('express')
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const cors = require('cors')
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const { execSync } = require('child_process')
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const path = require('path')
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const fs = require('fs')
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const app = express()
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const PORT = 3001
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app.use(cors())
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app.use(express.json({ limit: '1mb' }))
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// 查找可用的 C 编译器
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// w64devkit GCC 路径
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const W64DEVKIT_DIR = path.join(__dirname, 'bin', 'w64devkit', 'w64devkit')
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const W64DEVKIT_GCC = path.join(W64DEVKIT_DIR, 'bin', 'gcc.exe')
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const W64DEVKIT_PREFIX = path.join(W64DEVKIT_DIR, 'lib', 'gcc')
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function findCompiler() {
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const candidates = [
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// MinGW / MSYS2 (PATH)
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'gcc.exe',
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'x86_64-w64-mingw32-gcc.exe',
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'i686-w64-mingw32-gcc.exe',
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// TCC (Tiny C Compiler)
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'tcc.exe',
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// Clang
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'clang.exe',
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// MSVC
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'cl.exe',
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// 本项目的便携编译器
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path.join(__dirname, 'bin', 'tcc.exe'),
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path.join(__dirname, 'bin', 'gcc.exe'),
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path.join(__dirname, '..', 'tools', 'tcc', 'tcc.exe'),
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]
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// 先在 PATH 中查找
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for (const name of ['gcc.exe', 'tcc.exe', 'clang.exe', 'cl.exe']) {
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try {
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execSync(`where ${name}`, { stdio: 'pipe', timeout: 3000 })
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return { path: name, name }
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} catch {}
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}
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// 检查 w64devkit GCC（需设置 GCC_EXEC_PREFIX）
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if (fs.existsSync(W64DEVKIT_GCC)) {
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return { path: W64DEVKIT_GCC, name: 'gcc.exe', execPrefix: W64DEVKIT_PREFIX }
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}
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// 再检查其他具体路径
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for (const candidate of candidates) {
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try {
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const absPath = path.resolve(candidate)
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if (fs.existsSync(absPath)) {
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return { path: absPath, name: path.basename(absPath) }
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}
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} catch {}
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}
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// 搜索 Visual Studio MSVC 安装目录
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try {
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const vsPaths = [
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'C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC',
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'C:\\Program Files\\Microsoft Visual Studio\\2022\\Professional\\VC\\Tools\\MSVC',
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'C:\\Program Files\\Microsoft Visual Studio\\2022\\Enterprise\\VC\\Tools\\MSVC',
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'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Community\\VC\\Tools\\MSVC',
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'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Tools\\MSVC',
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]
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for (const vsPath of vsPaths) {
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if (fs.existsSync(vsPath)) {
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const versions = fs.readdirSync(vsPath).sort().reverse()
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for (const ver of versions) {
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const clPath = path.join(vsPath, ver, 'bin', 'Hostx64', 'x64', 'cl.exe')
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if (fs.existsSync(clPath)) {
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return { path: clPath, name: 'cl.exe' }
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}
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}
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}
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}
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} catch {}
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return null
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}
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// 编译并运行 C 代码
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app.post('/api/run-c', (req, res) => {
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const { code } = req.body
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if (!code) {
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return res.status(400).json({ error: '请提供 C 代码' })
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}
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const compiler = findCompiler()
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if (!compiler) {
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return res.status(400).json({
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error: '未找到 C 编译器',
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hint: '请安装 MinGW-w64 GCC 编译器',
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installGuide: [
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'--- 安装 MinGW-w64 ---',
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'方法一（推荐）：下载 MinGW-w64 GCC',
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' 1. 访问 https://winlibs.com/ 下载 GCC (MinGW-w64)',
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' 2. 解压并将 bin/ 目录添加到系统 PATH 环境变量',
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' 3. 重启终端后即可使用',
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'',
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'方法二（轻量）：下载 TCC (Tiny C Compiler)',
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' 将 tcc.exe 放入 server/bin/ 目录',
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'',
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'安装后重新启动: npm run server',
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].join('\n')
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})
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}
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const tmpDir = path.join(__dirname, '..', 'tmp')
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if (!fs.existsSync(tmpDir)) {
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fs.mkdirSync(tmpDir, { recursive: true })
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}
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const srcFile = path.join(tmpDir, `code_${Date.now()}.c`)
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const outFile = path.join(tmpDir, `code_${Date.now()}.exe`)
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try {
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// 写入源码
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fs.writeFileSync(srcFile, code, 'utf-8')
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let compileCmd
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const execOptions = {
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timeout: 15000,
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cwd: tmpDir,
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encoding: 'utf-8',
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env: { ...process.env }
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}
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if (compiler.name.includes('tcc')) {
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// TCC: 编译并运行一步到位（支持 -run）
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compileCmd = `"${compiler.path}" -run "${srcFile}"`
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} else if (compiler.execPrefix) {
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// w64devkit GCC: 需要设置 GCC_EXEC_PREFIX 并加入 PATH
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const w64binDir = path.dirname(compiler.path)
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execOptions.env.GCC_EXEC_PREFIX = compiler.execPrefix + path.sep
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execOptions.env.PATH = w64binDir + path.delimiter + (execOptions.env.PATH || '')
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compileCmd = `"${compiler.path}" "${srcFile}" -o "${outFile}" -Wall -std=c99`
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} else {
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// GCC/Clang: 先编译再运行
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compileCmd = `"${compiler.path}" "${srcFile}" -o "${outFile}" -Wall -std=c99 2>&1`
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}
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// 编译
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const compileOutput = execSync(compileCmd, execOptions)
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let runOutput = compileOutput
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// GCC/Clang: 编译后还需运行 exe
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if (!compiler.name.includes('tcc') && fs.existsSync(outFile)) {
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try {
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runOutput = execSync(`"${outFile}"`, {
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timeout: 10000,
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cwd: tmpDir,
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encoding: 'utf-8',
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env: execOptions.env
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})
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} catch (runErr) {
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runOutput = runErr.stdout || runErr.message
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}
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}
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// 清理临时文件
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try {
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if (fs.existsSync(srcFile)) fs.unlinkSync(srcFile)
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if (fs.existsSync(outFile)) fs.unlinkSync(outFile)
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} catch {}
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res.json({ output: runOutput })
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} catch (compileErr) {
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// 编译错误
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res.json({
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output: compileErr.stdout || compileErr.message,
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isError: true
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})
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} finally {
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// 确保清理
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try {
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if (fs.existsSync(srcFile)) fs.unlinkSync(srcFile)
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if (fs.existsSync(outFile)) fs.unlinkSync(outFile)
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} catch {}
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}
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})
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// 健康检查
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app.get('/api/status', (req, res) => {
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const compiler = findCompiler()
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res.json({
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status: 'ok',
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compiler: compiler ? `${compiler.name} (${compiler.path})` : '未安装'
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})
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})
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// 下载 TCC 脚本
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app.get('/api/setup-compiler', (req, res) => {
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res.json({
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message: '请手动下载 TCC:',
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url: 'https://raw.githubusercontent.com/FooBarWidget/tinycc/master/tcc.exe',
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instructions: `将 tcc.exe 放入 ${path.join(__dirname, 'bin')} 目录`
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})
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})
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app.listen(PORT, () => {
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console.log(`✅ C 代码运行服务已启动: http://localhost:${PORT}`)
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const compiler = findCompiler()
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if (compiler) {
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console.log(` 检测到编译器: ${compiler.name}`)
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} else {
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console.log(` ⚠️ 未检测到 C 编译器，请安装后使用`)
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console.log(` 下载 TCC: https://raw.githubusercontent.com/FooBarWidget/tinycc/master/tcc.exe`)
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console.log(` 放置路径: ${path.join(__dirname, 'bin', 'tcc.exe')}`)
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}
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})
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