From d86174c8f68c9fb63dd3c6b6358df9cbf40577d8 Mon Sep 17 00:00:00 2001 From: aaryak-shah Date: Mon, 28 Dec 2020 16:40:31 +0530 Subject: [PATCH 1/3] application dockerised, added DOCS.md & start script --- DOCS.md | 99 ++ LICENSE | 21 - README.md | 43 +- docker-compose.yml | 24 + executor/Dockerfile | 17 + executor/app.js | 16 + {server => executor}/lib/runCode.js | 15 +- executor/package-lock.json | 380 ++++++++ executor/package.json | 18 + executor/routes/code.js | 31 + index.js | 15 - package-lock.json | 1353 --------------------------- package.json | 28 - server/Dockerfile | 13 + server/app.js | 90 +- server/languages/cpp.js | 13 +- server/languages/javascript.js | 7 +- server/languages/python.js | 7 +- server/lib/execute.js | 15 + server/package-lock.json | 393 ++++++++ server/package.json | 19 + server/routes/handler.js | 105 +++ server/storage/README.md | 1 - start.sh | 28 + 24 files changed, 1234 insertions(+), 1517 deletions(-) create mode 100644 DOCS.md delete mode 100644 LICENSE create mode 100644 docker-compose.yml create mode 100644 executor/Dockerfile create mode 100644 executor/app.js rename {server => executor}/lib/runCode.js (68%) create mode 100644 executor/package-lock.json create mode 100644 executor/package.json create mode 100644 executor/routes/code.js delete mode 100644 index.js delete mode 100644 package-lock.json delete mode 100644 package.json create mode 100644 server/Dockerfile create mode 100644 server/lib/execute.js create mode 100644 server/package-lock.json create mode 100644 server/package.json create mode 100644 server/routes/handler.js delete mode 100644 server/storage/README.md create mode 100755 start.sh diff --git a/DOCS.md b/DOCS.md new file mode 100644 index 0000000..af01c18 --- /dev/null +++ b/DOCS.md @@ -0,0 +1,99 @@ + +# RCE Documentation + +## Setting up the application + +### Installation: + +The application can be installed by cloning this repository. +The project requires the host machine to have docker and docker-compose installed. Follow the official installation guide available at [Install Docker Engine](https://docs.docker.com/engine/install/ubuntu/) and [Install Docker Compose](https://docs.docker.com/compose/install/). +Note that docker-compose depends on docker engine to function. + +### Permissions: + +Docker may return a Permission Denied error without being run as `sudo`. To fix this, we do the following: +``` +$ sudo groupadd docker +$ sudo usermod -aG docker $USER +$ newgrp docker +$ docker run hello-world +``` +Reboot the host machine. + +## Starting the application + +### Using the Bash Script [Linux/Unix only]: + +Start a terminal and redirect into the project repository: +``` +$ cd /path/to/repo/remote-code-executor +``` + +Run the provided `start.sh` bash script: +``` +$ ./start.sh +Select mode [P]roduction / [d]evelopment: d +``` + +Providing input as `d` starts the application in development mode, and reflects all the changes made before starting. Providing `p` as the input starts the application without rebuilding, any changes made will not be reflected. + +The mode can directly be provided to the command as an argument: +``` +$ ./start.sh p +``` + +### Using Docker Commands: + +The project uses a docker volume called `userdata` to store any user generated files [code, input, a.out files]. We can create this volume as follows: +``` +$ docker volume create --name=userdata +``` +The rest of the setup is handled by docker-compose: +``` +$ docker-compose up +``` +The containers are built from scratch only for the first time we run this command. Any subsequent attempts will simply start the existing container. To rebuild the containers (in case of any changes to the source), we can run: +``` +$ docker-compose up --build +``` + +## How it works + +> NOTE: This project currently only has a server API. The front-end for the same is not yet available. Postman or cURL can be used to run the application meanwhile. + +The back-end functionality is provided by means of two docker services that run node applications -- `server` and `executor`, each in its own container. The containers are linked by the `userdata:/storage` mounted volume, as well as over a network, thanks to docker-compose. + +Starting the application in any of the above listed methods starts both of these services simultaneously. The `server` listens on port 9000, while the `executor` listens on port 8080. + +### The Executor: + +`executor` is an express server API that accepts a POST request at `/code/`, where the language is simply the file extension used by that programming language (py, cpp, js). + +The request body contains a single key `filePath` which is the path to the user's files in the mounted volume `/storage/`. These files are generated by the `server` container and will be explained later. + +This service simply executes the code file at the given location and returns the result as a JSON response. +All user files generated for this execution are deleted by this service. + +### The Server: + +`server` is also an express API. The client can send a POST request to the `/code` endpoint. +The request body here contains 4 keys: +- `key ` - A random string to uniquely identify each request + +- `language ` - Represents the programming language to be used. Value is identical to the file extension used by the language + +- `code ` - User provided code + +- `input ` - User provided input for their code + +`key` can be entered manually as any random string using Postman or cURL. It can also be obtained by sending a GET request to `/code`. This system is in place for the front-end to utilise in the future. + +**Significance of the key:** +The `key` is the string that acts as the name of all the files a user's request generates. For example, if a user sends a C++ program along with a key of `abcde` then the following files are generated: +``` +storage +├── abcde.cpp (source code file) +├── abcde (input text file) +└── abcde.out (output file, generated on compilation) +``` +The `key` is thus also used to generate the `filePath` variable that we saw in the executor service. The `filePath` is simply given (from root) as -- `/storage/${key}` without any file extension. \ No newline at end of file diff --git a/LICENSE b/LICENSE deleted file mode 100644 index 72d2fc6..0000000 --- a/LICENSE +++ /dev/null @@ -1,21 +0,0 @@ -MIT License - -Copyright (c) 2020 Abhigyan Abhikaushalam Students' Forum - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. diff --git a/README.md b/README.md index 9cb399a..e517864 100644 --- a/README.md +++ b/README.md @@ -4,19 +4,24 @@ This RCE project currently provides a basic API to execute programs on a remote ## Functioning: -The API accepts POST requests to the `/code` endpoint. +The API accepts POST requests to the `localhost:9000/code` endpoint. Check out DOCS.md for a detailed reference ### Request Body Keys: -- Key- A random string to uniquely identify each request -- Languge -- Code String -- Input String +- `key ` - A random string to uniquely identify each request + +- `language ` - Represents the programming language to be used. Value is identical to the file extension used by the language + +- `code ` - User provided code + +- `input ` - User provided input for their code ### Supported Languages: - Python3 (use: _py_) + - C++ (use: _cpp_) + - Node/Javascript (use: _js_) ## Code Validation: @@ -26,37 +31,63 @@ Currently, code validation takes place by selectively rejecting or accepting lib #### Python (Rejected Libraries): - os + - subprocess + - shlex + - xml + - pickle #### C++ (Accepted Libraries): - iostream + - algorithm + - stdio + - cstdio + - vector + - math + - cmath + - cstring + - string + - deque + - iomanip + - iterator + - map + - queue + - set + - stack + - conio + - ctype #### Node/Javascript (Accepted Libraries): - readline + - buffer + - string_decoder + - timers + - stream -- util + +- util \ No newline at end of file diff --git a/docker-compose.yml b/docker-compose.yml new file mode 100644 index 0000000..27e0285 --- /dev/null +++ b/docker-compose.yml @@ -0,0 +1,24 @@ +version: "3.8" +services: + # server container manages client requests + server: + build: ./server + ports: + - "9000:9000" + # localhost:9000/ for host machine + # server:9000/ for containers + volumes: + - userdata:/storage # mounted volume, contains user generated data + # executor container responds to requests from the server container + executor: + build: ./executor + ports: + - "8080:8080" + # localhost:8080/ for host machine + # executor:8080/ for containers + volumes: + - userdata:/storage # mounted volume, contains user generated data +volumes: + # userdata volume common to all composed containers + userdata: + external: true \ No newline at end of file diff --git a/executor/Dockerfile b/executor/Dockerfile new file mode 100644 index 0000000..0cb7374 --- /dev/null +++ b/executor/Dockerfile @@ -0,0 +1,17 @@ +FROM node:12-alpine + +WORKDIR /executor + +RUN apk add python3 + +RUN apk add g++ + +ENV NODE_ENV=production + +COPY ["package.json", "package-lock.json*", "./"] + +RUN npm install --production + +COPY . . + +CMD ["node", "app.js"] \ No newline at end of file diff --git a/executor/app.js b/executor/app.js new file mode 100644 index 0000000..966bba6 --- /dev/null +++ b/executor/app.js @@ -0,0 +1,16 @@ +const express = require('express') +const runCode = require('./lib/runCode') +const bodyParser = require('body-parser') + +const PORT = 8080 +const app = express() + +app.get('*', (req, res) => { + res.status(404).send('API does not support this endpoint') +}) + +app.use('/code', require('./routes/code')) + +app.listen(PORT, () => { + console.log('Executor available on port 8080') +}) diff --git a/server/lib/runCode.js b/executor/lib/runCode.js similarity index 68% rename from server/lib/runCode.js rename to executor/lib/runCode.js index f6371eb..014ff08 100644 --- a/server/lib/runCode.js +++ b/executor/lib/runCode.js @@ -3,9 +3,11 @@ const exec = util.promisify(require('child_process').exec) const fs = require('fs') const runCode = async (language, filePath) => { - let result = { stderr: 'no output' } + console.log('runCode called'); + var result = { stderr: 'no output' } switch (language) { case 'cpp': { + console.log('c++ exec'); result = await exec( `g++ -o ${filePath}.out ${filePath}.cpp && ${filePath}.out < ${filePath}`, { timeout: 3000, maxBuffer: 1024 * 1024 * 5 } @@ -22,17 +24,26 @@ const runCode = async (language, filePath) => { break } case 'py': { + console.log('runCode.js py switch'); + console.log('executing'); result = await exec(`cat ${filePath} | python3 ${filePath}.py`, { timeout: 5000, maxBuffer: 1024 * 1024 * 5, }) + // result = await exec(`ls /storage/ -al`, { + // timeout: 5000, + // maxBuffer: 1024 * 1024 * 5, + // }) + console.log('Result:'); + console.log(result) break } } fs.promises.unlink(filePath) - fs.promises.unlink(filePath + '.' + language) + console.log('returning from runCode() with result'); + console.log(result); return result } diff --git a/executor/package-lock.json b/executor/package-lock.json new file mode 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require('../lib/runCode') +const bodyParser = require('body-parser') +const express = require('express') +const router = express.Router() + +router.use(bodyParser.json()) // for parsing routerlication/json +router.use(bodyParser.urlencoded({ extended: true })) + +router.get('/', (req, res) => { + res.send('API requires POST to /code/') +}) + +router.post('/py', async (req, res) => { + const { filePath } = req.body + const result = await runCode('py', filePath) + res.send(result) +}) + +router.post('/cpp', async (req, res) => { + const { filePath } = req.body + const result = await runCode('cpp', filePath) + res.send(result) +}) + +router.post('/js', async (req, res) => { + const { filePath } = req.body + const result = await runCode('js', filePath) + res.send(result) +}) + +module.exports = router \ No newline at end of file diff --git a/index.js b/index.js deleted file mode 100644 index c904087..0000000 --- a/index.js +++ /dev/null @@ -1,15 +0,0 @@ -//entry point - -// package imports 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"devDependencies": { - "nodemon": "2.0.6", - "prettier": "2.2.1" - } -} diff --git a/server/Dockerfile b/server/Dockerfile new file mode 100644 index 0000000..f8751f2 --- /dev/null +++ b/server/Dockerfile @@ -0,0 +1,13 @@ +FROM node:12 + +ENV NODE_ENV=production + +WORKDIR /server + +COPY ["package.json", "package-lock.json*", "./"] + +RUN npm install --production + +COPY . . + +CMD [ "node", "app.js" ] \ No newline at end of file diff --git a/server/app.js b/server/app.js index 10e158c..f5db23d 100644 --- a/server/app.js +++ b/server/app.js @@ -1,87 +1,15 @@ +//entry point + // package imports const express = require('express') -const fs = require('fs') -const bodyParser = require('body-parser') -const pythonHandler = require('./languages/python') -const cppHandler = require('./languages/cpp') -const jsHandler = require('./languages/javascript') -const crypto = require('crypto') -// global variables initialisation -const USERSTORAGEPATH = './server/storage/' -const router = express.Router() - -// middleware -router.use(bodyParser.json()) // for parsing application/json -router.use(bodyParser.urlencoded({ extended: true })) - -// routes - -// GET handler for / -router.get('/', (req, res) => { - res.send(`POST programs to localhost:9000/code`) -}) - -router.get('/code', (req, res) => { - const key = crypto.randomBytes(5).toString('hex') - res.send(key) -}) - -// POST handler for /code -router.post('/code', (req, res) => { - // request body destructured - const { - key, //a unique key identifying each user - language, // specifies programming language, doubles as file extension for storage/code.xyz file - input, // user's input string to be stored in storage/input - code, // user's code string to be stored in storage/code.xyz - } = req.body - - const inputFilePath = USERSTORAGEPATH + key - const codeFilePath = USERSTORAGEPATH + key - // storage for input - fs.writeFile(inputFilePath, input, (inpFileErr) => { - if (inpFileErr) { - res.send(`input err ${inpFileErr}`) - return - } +// global variables initialised +const PORT = process.env.PORT || 9000 +const app = express() - // storage for user's program - fs.writeFile(codeFilePath + '.' + language, code, async (codeFileErr) => { - if (codeFileErr) { - res.send(`code err ${codeFileErr}`) - return - } +// middleware, routing +app.use('/', require('./routes/handler')) - // switching logic to call language specific handler - switch (language) { - // python - case 'py': { - pythonHandler(key, USERSTORAGEPATH) - .then((result) => res.send(result)) // callback responds result of successful execution - .catch((err) => res.send(err)) // callback responds result of failed execution - break - } - - // c++ - case 'cpp': { - cppHandler(key, USERSTORAGEPATH) - .then((result) => res.send(result)) // callback responds result of successful execution - .catch((err) => res.send(err)) // callback responds result of failed execution - break - } - - // node.js - case 'js': { - jsHandler(key, USERSTORAGEPATH) - .then((result) => res.send(result)) // callback responds result of successful execution - .catch((err) => res.send(err)) // callback responds result of failed execution - // break - } - } - }) - }) +app.listen(PORT, () => { + console.log(`app listening at http://localhost:${PORT}`) }) - -// router exported to index -module.exports = router diff --git a/server/languages/cpp.js b/server/languages/cpp.js index 9c9ed6f..dc77c81 100644 --- a/server/languages/cpp.js +++ b/server/languages/cpp.js @@ -1,17 +1,17 @@ // handler for c++ programs // package imports -const runCode = require('../lib/runCode') +// const runCode = require('../lib/runCode') const isValid = require('../lib/valid') +const execute = require('../lib/execute') // execution handling const cppHandler = async (key, storagePath) => { - const filePath = storagePath + key + const filePath = storagePath + key // RegExp for #include statement sanitisation const importRE = /#include\s*<([\w^h]*).?h?>/gim - // list of acceptable libraries const acceptList = [ 'iostream', @@ -43,9 +43,10 @@ const cppHandler = async (key, storagePath) => { } // we use a promisified exec() call so that the child process output can be handled outside the callback - return await runCode('cpp', filePath) - - // returns exec() result to app + const result = await execute('cpp', filePath) + console.log('retruning to handler with result') + console.log(result) + return result } // code handler exported diff --git a/server/languages/javascript.js b/server/languages/javascript.js index 360c99e..76b8412 100644 --- a/server/languages/javascript.js +++ b/server/languages/javascript.js @@ -1,8 +1,10 @@ // handler for js programs // package imports -const runCode = require('../lib/runCode') +// const runCode = require('../lib/runCode') const isValid = require('../lib/valid') +const axios = require('axios') +const execute = require('../lib/execute') // execution handling const jsHandler = async (key, storagePath) => { @@ -30,7 +32,8 @@ const jsHandler = async (key, storagePath) => { } // we use a promisified exec() call so that the child process output can be handled outside the callback - return runCode('js', filePath) + const result = await execute('js', filePath) + return result } // code handler exported diff --git a/server/languages/python.js b/server/languages/python.js index 4343db2..50b223d 100644 --- a/server/languages/python.js +++ b/server/languages/python.js @@ -1,8 +1,10 @@ // handler for python scripts // package imports -const runCode = require('../lib/runCode') +// const runCode = require('../lib/runCode') const isValid = require('../lib/valid') +const axios = require('axios') +const execute = require('../lib/execute') // execution handling const pythonHandler = async (key, storagePath) => { @@ -34,7 +36,8 @@ const pythonHandler = async (key, storagePath) => { } // we use a promisified exec() call so that the child process output can be handled outside the callback - return runCode('py', filePath) + const result = await execute('py', filePath) + return result } //code handler exported diff --git a/server/lib/execute.js b/server/lib/execute.js new file mode 100644 index 0000000..4028581 --- /dev/null +++ b/server/lib/execute.js @@ -0,0 +1,15 @@ +const axios = require('axios') + +const execute = async (language, filePath) => { + const data = { filePath: filePath } + const options = { + headers: { + 'Content-Type': 'application/json', + 'Accept': 'application/json', + }, + } + const result = await axios.post(`http://executor:8080/code/${language}`, data, options) + return result.data +} + +module.exports = execute diff --git a/server/package-lock.json b/server/package-lock.json new file mode 100644 index 0000000..3ed32e9 --- /dev/null +++ b/server/package-lock.json @@ -0,0 +1,393 @@ +{ + "name": "server", + "version": "1.0.0", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "accepts": { + "version": "1.3.7", + "resolved": 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"media-typer": "0.3.0", + "mime-types": "~2.1.24" + } + }, + "unpipe": { + "version": "1.0.0", + "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz", + "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=" + }, + "utils-merge": { + "version": "1.0.1", + "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz", + "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=" + }, + "vary": { + "version": "1.1.2", + "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz", + "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=" + } + } +} diff --git a/server/package.json b/server/package.json new file mode 100644 index 0000000..1d91dcc --- /dev/null +++ b/server/package.json @@ -0,0 +1,19 @@ +{ + "name": "server", + "version": "1.0.0", + "description": "", + "main": "app.js", + "scripts": { + "test": "echo \"Error: no test specified\" && exit 1" + }, + "author": "", + "license": "ISC", + "dependencies": { + "axios": "^0.21.1", + "body-parser": "^1.19.0", + "express": "^4.17.1" + }, + "devDependencies": { + "prettier": "2.2.1" + } +} diff --git a/server/routes/handler.js b/server/routes/handler.js new file mode 100644 index 0000000..a8b89e4 --- /dev/null +++ b/server/routes/handler.js @@ -0,0 +1,105 @@ +// package imports +const express = require('express') +const fs = require('fs') +const bodyParser = require('body-parser') +const pythonHandler = require('../languages/python') +const cppHandler = require('../languages/cpp') +const jsHandler = require('../languages/javascript') +const crypto = require('crypto') + +// global variables initialisation +const USERSTORAGEPATH = '/storage/' +const router = express.Router() + +// middleware +router.use(bodyParser.json()) // for parsing application/json +router.use(bodyParser.urlencoded({ extended: true })) + +// routes + +// GET handler for / +router.get('/', async (req, res) => { + res.send(`POST programs to localhost:9000/code`) +}) + +router.get('/code', (req, res) => { + const key = crypto.randomBytes(5).toString('hex') + res.send(key) +}) + +// POST handler for /code +router.post('/code', (req, res) => { + // request body destructured + const { + key, //a unique key identifying each user + language, // specifies programming language, doubles as file extension for storage/code.xyz file + input, // user's input string to be stored in storage/input + code, // user's code string to be stored in storage/code.xyz + } = req.body + + console.log(`key: ${key}`); + console.log(`language: ${language}`) + console.log(`path: ${USERSTORAGEPATH}`) + + const inputFilePath = USERSTORAGEPATH + key + const codeFilePath = USERSTORAGEPATH + key + + // storage for input + fs.writeFile(inputFilePath, input, (inpFileErr) => { + if (inpFileErr) { + res.send(`input err ${inpFileErr}`) + return + } + + // storage for user's program + fs.writeFile(codeFilePath + '.' + language, code, async (codeFileErr) => { + if (codeFileErr) { + res.send(`code err ${codeFileErr}`) + return + } + + // switching logic to call language specific handler + switch (language) { + // python + case 'py': { + console.log('handler.js py language switch'); + pythonHandler(key, USERSTORAGEPATH) + .then((result) => { + console.log('responding to client with result'); + console.log(result); + res.send(result)}) // callback responds result of successful execution + .catch((err) => res.send(err)) // callback responds result of failed execution + break + } + + // c++ + case 'cpp': { + console.log('handler.js cpp language switch'); + cppHandler(key, USERSTORAGEPATH) + .then((result) => { + console.log('responding to client with result') + console.log(result) + res.send(result) + }) // callback responds result of successful execution + .catch((err) => { + console.log('responding to client with err'); + console.log(err); + res.send(err) + }) // callback responds result of failed execution + break + } + + // node.js + case 'js': { + jsHandler(key, USERSTORAGEPATH) + .then((result) => res.send(result)) // callback responds result of successful execution + .catch((err) => res.send(err)) // callback responds result of failed execution + // break + } + } + }) + }) +}) + +// router exported to index +module.exports = router diff --git a/server/storage/README.md b/server/storage/README.md deleted file mode 100644 index d351a1f..0000000 --- a/server/storage/README.md +++ /dev/null @@ -1 +0,0 @@ -It temporarily stores the files created during code execution. diff --git a/start.sh b/start.sh new file mode 100755 index 0000000..b603b95 --- /dev/null +++ b/start.sh @@ -0,0 +1,28 @@ +#!/bin/bash + +# this bash script will perform necessary steps to run the server and executor containers +# script currently requires docker and docker-compose to be installed + +# docker volume is created +docker volume create --name=userdata + +clear + +# check arguments +if [[ $1 = "d" ]] || [[ $1 = "D" ]] +then + docker-compose up --build # dev mode, container rebuilt to accomodate changes +elif [[ $1 = "P" ]] || [[ $1 = "p" ]] +then + docker-compose up # production mode, container started directly +else + echo -n "Select mode [P]roduction / [d]evelopment: " + read MODE + if [[ $MODE = "P" ]] || [[ $MODE = "p" ]] + then + docker-compose up + elif [[ $MODE = "D" ]] || [[ $MODE = "d" ]] + then + docker-compose up --build + fi +fi \ No newline at end of file From 5da26161a4c245b9e3b7161b8107073bf501a9cc Mon Sep 17 00:00:00 2001 From: aaryak-shah <56076061+aaryak-shah@users.noreply.github.com> Date: Mon, 28 Dec 2020 16:51:39 +0530 Subject: [PATCH 2/3] fixed DOCS.md --- DOCS.md | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/DOCS.md b/DOCS.md index af01c18..d76a7cd 100644 --- a/DOCS.md +++ b/DOCS.md @@ -21,14 +21,13 @@ $ docker run hello-world Reboot the host machine. ## Starting the application - -### Using the Bash Script [Linux/Unix only]: - Start a terminal and redirect into the project repository: ``` $ cd /path/to/repo/remote-code-executor ``` +### Using the Bash Script [Linux/Unix only]: + Run the provided `start.sh` bash script: ``` $ ./start.sh @@ -93,7 +92,7 @@ The `key` is the string that acts as the name of all the files a user's request ``` storage ├── abcde.cpp (source code file) -├── abcde (input text file) +├── abcde (input text file) └── abcde.out (output file, generated on compilation) ``` -The `key` is thus also used to generate the `filePath` variable that we saw in the executor service. The `filePath` is simply given (from root) as -- `/storage/${key}` without any file extension. \ No newline at end of file +The `key` is thus also used to generate the `filePath` variable that we saw in the executor service. The `filePath` is simply given (from root) as -- `/storage/${key}` without any file extension. From 5fc7f14484c360852c65a7a562836964b5ed87b8 Mon Sep 17 00:00:00 2001 From: aaryak-shah Date: Mon, 28 Dec 2020 20:54:12 +0530 Subject: [PATCH 3/3] fixed execution error handling. added dockerignore --- executor/.dockerignore | 1 + executor/Dockerfile | 2 +- executor/lib/runCode.js | 56 +++++++++++++++++++++++------------------ server/.dockerignore | 1 + server/Dockerfile | 2 +- 5 files changed, 35 insertions(+), 27 deletions(-) create mode 100644 executor/.dockerignore create mode 100644 server/.dockerignore diff --git a/executor/.dockerignore b/executor/.dockerignore new file mode 100644 index 0000000..40b878d --- /dev/null +++ b/executor/.dockerignore @@ -0,0 +1 @@ +node_modules/ \ No newline at end of file diff --git a/executor/Dockerfile b/executor/Dockerfile index 0cb7374..a6bcab2 100644 --- a/executor/Dockerfile +++ b/executor/Dockerfile @@ -1,4 +1,4 @@ -FROM node:12-alpine +FROM node:14-alpine WORKDIR /executor diff --git a/executor/lib/runCode.js b/executor/lib/runCode.js index 014ff08..cadff7b 100644 --- a/executor/lib/runCode.js +++ b/executor/lib/runCode.js @@ -3,47 +3,53 @@ const exec = util.promisify(require('child_process').exec) const fs = require('fs') const runCode = async (language, filePath) => { - console.log('runCode called'); + console.log('runCode called') var result = { stderr: 'no output' } switch (language) { case 'cpp': { - console.log('c++ exec'); - result = await exec( - `g++ -o ${filePath}.out ${filePath}.cpp && ${filePath}.out < ${filePath}`, - { timeout: 3000, maxBuffer: 1024 * 1024 * 5 } - ) - fs.promises.unlink(filePath + '.out') + console.log('c++ exec') + try { + result = await exec( + `g++ -o ${filePath}.out ${filePath}.cpp && ${filePath}.out < ${filePath}`, + { timeout: 3000, maxBuffer: 1024 * 1024 * 5 } + ) + fs.promises.unlink(filePath + '.out') + } catch (err) { + result = { stderr: err } + } break } case 'js': { console.log('js exec') - result = await exec(`node ${filePath}.js < ${filePath}`, { - timeout: 5000, - maxBuffer: 1024 * 1024 * 5, - }) + try { + result = await exec(`node ${filePath}.js < ${filePath}`, { + timeout: 5000, + maxBuffer: 1024 * 1024 * 5, + }) + } catch (err) { + result = { stderr: err } + } break } case 'py': { - console.log('runCode.js py switch'); - console.log('executing'); - result = await exec(`cat ${filePath} | python3 ${filePath}.py`, { - timeout: 5000, - maxBuffer: 1024 * 1024 * 5, - }) - // result = await exec(`ls /storage/ -al`, { - // timeout: 5000, - // maxBuffer: 1024 * 1024 * 5, - // }) - console.log('Result:'); - console.log(result) + console.log('runCode.js py switch') + console.log('executing') + try { + result = await exec(`cat ${filePath} | python3 ${filePath}.py`, { + timeout: 5000, + maxBuffer: 1024 * 1024 * 5, + }) + } catch (err) { + result = { stderr: err } + } break } } fs.promises.unlink(filePath) fs.promises.unlink(filePath + '.' + language) - console.log('returning from runCode() with result'); - console.log(result); + // console.log('returning from runCode() with result'); + // console.log(result); return result } diff --git a/server/.dockerignore b/server/.dockerignore new file mode 100644 index 0000000..40b878d --- /dev/null +++ b/server/.dockerignore @@ -0,0 +1 @@ +node_modules/ \ No newline at end of file diff --git a/server/Dockerfile b/server/Dockerfile index f8751f2..942c6f2 100644 --- a/server/Dockerfile +++ b/server/Dockerfile @@ -1,4 +1,4 @@ -FROM node:12 +FROM node:14 ENV NODE_ENV=production