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| 1 | +import express from "express"; |
| 2 | +import cors from "cors"; |
| 3 | +// import routes from './routes' |
| 4 | + |
| 5 | +const fs = require("fs"); |
| 6 | +const { exec } = require("child_process"); |
| 7 | + |
| 8 | +console.log("Starting OpenRank Execution Server"); |
| 9 | + |
| 10 | +const app = express(); |
| 11 | +app.use(cors()); |
| 12 | +app.use(express.urlencoded({ extended: true })); |
| 13 | +app.use(express.json()); |
| 14 | + |
| 15 | +//Add handlers for routes here |
| 16 | + |
| 17 | +//Lang specific meta, we have to configure this manually for now |
| 18 | +const langMeta = { |
| 19 | + python3: { |
| 20 | + extension: "py", |
| 21 | + command: "py", |
| 22 | + interpreted: true |
| 23 | + }, |
| 24 | + python2: { |
| 25 | + extension: "py", |
| 26 | + command: "python", |
| 27 | + interpreted: true |
| 28 | + }, |
| 29 | + c: { |
| 30 | + extension: "c", |
| 31 | + defaultExecName: "a", |
| 32 | + execExtension: "exe", |
| 33 | + command: "", |
| 34 | + interpreted: false, |
| 35 | + compile: "gcc" |
| 36 | + }, |
| 37 | + java: { |
| 38 | + extension: "java", |
| 39 | + defaultExecName: "", |
| 40 | + execExtension: "", |
| 41 | + command: "java", |
| 42 | + interpreted: false, |
| 43 | + compile: "javac" |
| 44 | + } |
| 45 | +}; |
| 46 | + |
| 47 | +app.post("/", (req, res) => { |
| 48 | + //NOTE: Experimentation code |
| 49 | + /* |
| 50 | + This route takes the language and code from request and executes |
| 51 | + it by spawning a child process based on the meta-data |
| 52 | + available for a given language |
| 53 | + */ |
| 54 | + const { lang, code, filename } = req.body; |
| 55 | + fs.writeFile(`${filename}.${langMeta[lang].extension}`, code, err => { |
| 56 | + if (err) console.log(err); |
| 57 | + else console.log("Successfully Written to File."); |
| 58 | + }); |
| 59 | + if (langMeta[lang].interpreted) { |
| 60 | + exec( |
| 61 | + `${langMeta[lang].command} ${filename}.${langMeta[lang].extension}`, |
| 62 | + { timeout: 1000 }, |
| 63 | + (err, stdout, stderr) => res.send({ err, stderr, stdout }) |
| 64 | + ); |
| 65 | + } else { |
| 66 | + console.log("compiled lang"); |
| 67 | + exec( |
| 68 | + `${langMeta[lang].compile} ${filename}.${langMeta[lang].extension}`, |
| 69 | + (err, stdout, stderr) => { |
| 70 | + if (!stderr && !err) { |
| 71 | + const { execExtension, defaultExecName } = langMeta[lang]; |
| 72 | + const execFilename = |
| 73 | + (defaultExecName || filename) + |
| 74 | + (execExtension ? `.${execExtension}` : ``); |
| 75 | + console.log( |
| 76 | + `command for execution: ${langMeta[lang].command} ${execFilename}` |
| 77 | + ); |
| 78 | + exec( |
| 79 | + `${langMeta[lang].command} ${execFilename}`, |
| 80 | + { timeout: 1000 }, |
| 81 | + (err, stdout, stderr) => res.send({ err, stderr, stdout }) |
| 82 | + ); |
| 83 | + } else { |
| 84 | + res.send({ err, stderr, stdout }); |
| 85 | + } |
| 86 | + } |
| 87 | + ); |
| 88 | + } |
| 89 | + //TODO: Add logic to compare output with testcases saved in db before sending the response. |
| 90 | +}); |
| 91 | + |
| 92 | +app.listen(9000, () => { |
| 93 | + console.log("Example app listening on port 9000!"); |
| 94 | +}); |
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