diff --git a/api/.gitignore b/api/.gitignore new file mode 100644 index 0000000..3c3629e --- /dev/null +++ b/api/.gitignore @@ -0,0 +1 @@ +node_modules diff --git a/api/main.go b/api/main.go index 1fb17e5..2e7e378 100644 --- a/api/main.go +++ b/api/main.go @@ -1,302 +1,303 @@ package main import ( - "bytes" - "encoding/json" - "fmt" - "io/ioutil" - "net/http" - "os/exec" - "regexp" - "strings" - "time" + "bytes" + "encoding/json" + "fmt" + "io/ioutil" + "net/http" + "os/exec" + "regexp" + "strings" + "time" ) type Inbound struct { - Language string `json:"language"` - Source string `json:"source"` - Args []string `json:"args"` + Language string `json:"language"` + Source string `json:"source"` + Args []string `json:"args"` } type Problem struct { - Code string `json:"code"` - Message string `json:"message"` + Code string `json:"code"` + Message string `json:"message"` } type Outbound struct { - Ran bool `json:"ran"` - Language string `json:"language"` - Version string `json:"version"` - Output string `json:"output"` - Stdout string `json:"stdout"` - Stderr string `json:"stderr"` + Ran bool `json:"ran"` + Language string `json:"language"` + Version string `json:"version"` + Output string `json:"output"` + Stdout string `json:"stdout"` + Stderr string `json:"stderr"` } type Language struct { - Name string `json:"name,omitempty"` - Version string `json:"version,omitempty"` + Name string `json:"name,omitempty"` + Version string `json:"version,omitempty"` + Aliases []string `json:"aliases,omitempty"` } var instance int var languages []Language func main() { - port := "2000" + port := "2000" - var err error - languages, err = UpdateVersions() + var err error + languages, err = UpdateVersions() - if err != nil { - fmt.Println("could not get version info and therefore couldn't start") - fmt.Println(err) - return - } + if err != nil { + fmt.Println("could not get version info and therefore couldn't start") + fmt.Println(err) + return + } - fmt.Println("starting api on port", port) - http.HandleFunc("/execute", Execute) - http.HandleFunc("/versions", Versions) - http.ListenAndServe(":"+port, nil) + fmt.Println("starting api on port", port) + http.HandleFunc("/execute", Execute) + http.HandleFunc("/versions", Versions) + http.ListenAndServe(":"+port, nil) } func Execute(res http.ResponseWriter, req *http.Request) { - res.Header().Set("Content-Type", "application/json") + res.Header().Set("Content-Type", "application/json") - // get json - inbound := Inbound{} - message := json.NewDecoder(req.Body) - message.Decode(&inbound) + // get json + inbound := Inbound{} + message := json.NewDecoder(req.Body) + message.Decode(&inbound) - whitelist := []string{ - "awk", - "bash", - "brainfuck", "bf", - "c", - "cpp", "c++", - "csharp", "cs", "c#", - "deno", "denojs", "denots", - "elixir", "exs", - "emacs", "elisp", "el", - "go", - "haskell", "hs", - "java", - "jelly", - "julia", "jl", - "kotlin", - "lua", - "nasm", "asm", - "nasm64", "asm64", - "node", "javascript", "js", - "perl", "pl", - "php", - "python2", - "python3", "python", - "paradoc", - "ruby", - "rust", - "swift", - "typescript", "ts", - } + whitelist := []string{ + "awk", + "bash", + "brainfuck", "bf", + "c", + "cpp", "c++", + "csharp", "cs", "c#", + "deno", "denojs", "denots", + "elixir", "exs", + "emacs", "elisp", "el", + "go", + "haskell", "hs", + "java", + "jelly", + "julia", "jl", + "kotlin", + "lua", + "nasm", "asm", + "nasm64", "asm64", + "node", "javascript", "js", + "perl", "pl", + "php", + "python2", + "python3", "python", + "paradoc", + "ruby", + "rust", + "swift", + "typescript", "ts", + } - // check if the supplied language is supported - // now calls function and returns - for _, lang := range whitelist { - if lang == inbound.Language { - launch(inbound, res) - return - } - } + // check if the supplied language is supported + // now calls function and returns + for _, lang := range whitelist { + if lang == inbound.Language { + launch(inbound, res) + return + } + } - // now only called when the language is not supported - problem := Problem{ - Code: "unsupported_language", - Message: inbound.Language + " is not supported by Piston", - } + // now only called when the language is not supported + problem := Problem{ + Code: "unsupported_language", + Message: inbound.Language + " is not supported by Piston", + } - pres, _ := json.Marshal(problem) + pres, _ := json.Marshal(problem) - res.WriteHeader(http.StatusBadRequest) - res.Write(pres) + res.WriteHeader(http.StatusBadRequest) + res.Write(pres) } func Versions(res http.ResponseWriter, req *http.Request) { - res.Header().Set("Content-Type", "application/json") + res.Header().Set("Content-Type", "application/json") - data, _ := json.Marshal(languages) + data, _ := json.Marshal(languages) - res.Write(data) + res.Write(data) } type StdWriter struct { - combined *string - separate *string + combined *string + separate *string } func (writer *StdWriter) Write(data []byte) (int, error) { - *writer.combined += string(data) - *writer.separate += string(data) + *writer.combined += string(data) + *writer.separate += string(data) - return len(data), nil + return len(data), nil } func launch(request Inbound, res http.ResponseWriter) { - stamp := time.Now().UnixNano() + stamp := time.Now().UnixNano() - // write the code to temp dir - srcfile := fmt.Sprintf("/tmp/%d.code", stamp) + // write the code to temp dir + srcfile := fmt.Sprintf("/tmp/%d.code", stamp) - ioutil.WriteFile(srcfile, []byte(request.Source), 0644) + ioutil.WriteFile(srcfile, []byte(request.Source), 0644) - // set up the arguments to send to the execute command - cmd := exec.Command("../lxc/execute", request.Language, srcfile, strings.Join(request.Args, "\n")) + // set up the arguments to send to the execute command + cmd := exec.Command("../lxc/execute", request.Language, srcfile, strings.Join(request.Args, "\n")) - // capture out/err - var stdout, stderr, combined string + // capture out/err + var stdout, stderr, combined string - cmd.Stdout = &StdWriter{ - combined: &combined, - separate: &stdout, - } + cmd.Stdout = &StdWriter{ + combined: &combined, + separate: &stdout, + } - cmd.Stderr = &StdWriter{ - combined: &combined, - separate: &stderr, - } + cmd.Stderr = &StdWriter{ + combined: &combined, + separate: &stderr, + } - stdout = strings.TrimSpace(stdout) - stderr = strings.TrimSpace(stderr) - combined = strings.TrimSpace(combined) + stdout = strings.TrimSpace(stdout) + stderr = strings.TrimSpace(stderr) + combined = strings.TrimSpace(combined) - if len(stdout) > 65536 { - stdout = stdout[:65536] - } + if len(stdout) > 65536 { + stdout = stdout[:65536] + } - if len(stderr) > 65536 { - stderr = stdout[:65536] - } + if len(stderr) > 65536 { + stderr = stdout[:65536] + } - if len(combined) > 65536 { - combined = combined[:65536] - } + if len(combined) > 65536 { + combined = combined[:65536] + } - err := cmd.Run() + err := cmd.Run() - // get the executing version of the language - execlang := request.Language + // get the executing version of the language + execlang := request.Language - switch execlang { - case "bf": - execlang = "brainfuck" - case "c++": - execlang = "cpp" - case "cs", "c#": - execlang = "csharp" - case "denojs", "denots": - execlang = "deno" - case "el", "elisp": - execlang = "emacs" - case "exs": - execlang = "elixir" - case "hs": - execlang = "haskell" - case "asm": - execlang = "nasm" - case "asm64": - execlang = "nasm64" - case "js", "javascript": - execlang = "node" - case "jl": - execlang = "julia" - case "python": - execlang = "python3" - case "ts": - execlang = "typescript" - } + switch execlang { + case "bf": + execlang = "brainfuck" + case "c++": + execlang = "cpp" + case "cs", "c#": + execlang = "csharp" + case "denojs", "denots": + execlang = "deno" + case "el", "elisp": + execlang = "emacs" + case "exs": + execlang = "elixir" + case "hs": + execlang = "haskell" + case "asm": + execlang = "nasm" + case "asm64": + execlang = "nasm64" + case "js", "javascript": + execlang = "node" + case "jl": + execlang = "julia" + case "python": + execlang = "python3" + case "ts": + execlang = "typescript" + } - // prepare response - outbound := Outbound{ - Ran: err == nil, - Language: request.Language, - Version: "", - Output: combined, - Stdout: stdout, - Stderr: stderr, - } + // prepare response + outbound := Outbound{ + Ran: err == nil, + Language: request.Language, + Version: "", + Output: combined, + Stdout: stdout, + Stderr: stderr, + } - // retrieve the language version - for _, lang := range languages { - if lang.Name == execlang { - outbound.Version = lang.Version - break - } - } + // retrieve the language version + for _, lang := range languages { + if lang.Name == execlang { + outbound.Version = lang.Version + break + } + } - response, _ := json.Marshal(outbound) + response, _ := json.Marshal(outbound) - res.Write(response) + res.Write(response) } func UpdateVersions() ([]Language, error) { - langs, err := GetVersions() + langs, err := GetVersions() - if err != nil { - return nil, err - } + if err != nil { + return nil, err + } - return langs, nil + return langs, nil } // get all the language and their current version func GetVersions() ([]Language, error) { - var languages []Language + var languages []Language - res, err := ExecVersionScript() + res, err := ExecVersionScript() - if err != nil { - return nil, err - } + if err != nil { + return nil, err + } - info := strings.Split(res, "---") + info := strings.Split(res, "---") - for _, v := range info { - if len(v) < 2 { - continue - } - name, version := GetVersion(v) - languages = append(languages, Language{ - Name: name, - Version: version, - }) - } + for _, v := range info { + if len(v) < 2 { + continue + } + name, version := GetVersion(v) + languages = append(languages, Language{ + Name: name, + Version: version, + }) + } - return languages, nil + return languages, nil } // run the script that retrieves all the language versions func ExecVersionScript() (string, error) { - cmd := exec.Command("../lxc/versions") + cmd := exec.Command("../lxc/versions") - var stdout bytes.Buffer - cmd.Stdout = &stdout - cmd.Stderr = &stdout + var stdout bytes.Buffer + cmd.Stdout = &stdout + cmd.Stderr = &stdout - err := cmd.Run() + err := cmd.Run() - return strings.ToLower(stdout.String()), err + return strings.ToLower(stdout.String()), err } // return the language and its version // most of the time it is easy to get the name and version // but for some languages helper functions are used func GetVersion(s string) (string, string) { - lines := strings.Split(s, "\n") + lines := strings.Split(s, "\n") - if lines[1] == "java" { - return "java", regexp.MustCompile("([0-9]+)").FindString(lines[2]) - } + if lines[1] == "java" { + return "java", regexp.MustCompile("([0-9]+)").FindString(lines[2]) + } - if lines[1] == "emacs" { - return "emacs", regexp.MustCompile("([0-9]+\\.[0-9]+)").FindString(lines[2]) - } + if lines[1] == "emacs" { + return "emacs", 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"validator": { + "version": "13.5.2", + "resolved": "https://registry.npmjs.org/validator/-/validator-13.5.2.tgz", + "integrity": "sha512-mD45p0rvHVBlY2Zuy3F3ESIe1h5X58GPfAtslBjY7EtTqGquZTj+VX/J4RnHWN8FKq0C9WRVt1oWAcytWRuYLQ==" + }, + "vary": { + "version": "1.1.2", + "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz", + "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=" + } + } +} diff --git a/api/package.json b/api/package.json new file mode 100644 index 0000000..cf6bf15 --- /dev/null +++ b/api/package.json @@ -0,0 +1,16 @@ +{ + "name": "api", + "version": "1.0.0", + "description": "", + "main": "index.js", + "scripts": { + "test": "echo \"Error: no test specified\" && exit 1" + }, + "keywords": [], + "author": "", + "license": "ISC", + "dependencies": { + "express": "^4.17.1", + "express-validator": "^6.9.2" + } +} diff --git a/api/src/index.js b/api/src/index.js new file mode 100644 index 0000000..1bb789f --- /dev/null +++ b/api/src/index.js @@ -0,0 +1,99 @@ +const { writeFile } = require('fs/promises'); +const express = require('express'); +const app = express(); +const languages = require('./languages'); +const { spawn, execFileSync } = require('child_process'); + +const versions = execFileSync(__dirname + '/../../lxc/versions') + .toString() + .toLowerCase() + .split('---') + .map(section => section.split('\n')) + .filter(section => section.length >= 2); + +function getVersion(language) { + return versions.find(section => section[0] === language?.name); +} + +for (const language of languages) { + // TODO: Add custom handlers for some languages + + language.version = getVersion(language); +} + +app.use(express.json()); + +app.post('/execute', (req, res) => { + const body = req.body; + + const language = languages.find(language => { + return language.aliases.includes(body.language?.toString()?.toLowerCase()); + }); + + if (!language) { + return res.status(400).json({ + code: 'unsupported_language', + message: `${body.language} is not supported by Piston`, + }); + } else if (!(body.source instanceof string)) { + return res.status(400).json({ + code: 'missing_source', + message: 'source field is invalid', + }); + } else if (body.args && !(body.args instanceof Array)) { + return res.status(400).json({ + code: 'invalid_args', + message: 'args field is not an array', + }); + } + + launch(res, language, body); +}); + +async function launch(res, language, body) { + const stamp = new Date().getTime(); + const sourceFile = `/tmp/${stamp}.code`; + + await writeFile(sourceFile, body.source); + + const process = spawn(__dirname + '/../../lxc/execute', [language.name, sourceFile, (body.args ?? []).join('\n')]); + + const result = { + ran: true, + language: language.name, + stderr: '', + stdout: '', + output: '', + }; + + if (language.version) + result.version = language.version; + + process.stderr.setEncoding('utf-8'); + process.stdout.setEncoding('utf-8'); + + process.stderr.addListener('data', chunk => { + result.stderr += chunk; + result.output += chunk; + }); + + process.stdout.addListener('data', chunk => { + result.stdout += chunk; + result.output += chunk; + }); + + result.stderr = result.stderr.substring(0, 65535); + result.stdout = result.stdout.substring(0, 65535); + result.output = result.output.substring(0, 65535); + + process.on('exit', () => { + res.json(result); + }); +} + +app.get('/versions', (req, res) => { + res.json(languages); +}); + +const PORT = 2000; +app.listen(PORT, () => console.log(`Listening on port ${PORT}`)); diff --git a/api/src/languages.js b/api/src/languages.js new file mode 100644 index 0000000..bee5db6 --- /dev/null +++ b/api/src/languages.js @@ -0,0 +1,118 @@ +module.exports = [ + { + name: 'nasm', + aliases: ['asm', 'nasm'], + }, + { + name: 'nasm64', + aliases: ['asm64', 'nasm64'], + }, + { + name: 'awk', + aliases: ['awk'], + }, + { + name: 'bash', + aliases: ['bash'], + }, + { + name: 'brainfuck', + aliases: ['bf', 'brainfuck'], + }, + { + name: 'c', + aliases: ['c'], + }, + { + name: 'csharp', + aliases: ['c#', 'cs', 'csharp'], + }, + { + name: 'cpp', + aliases: ['c++', 'cpp'], + }, + { + name: 'deno', + aliases: ['deno', 'denojs', 'denots'], + }, + { + name: 'ruby', + aliases: ['duby', 'rb', 'ruby'], + }, + { + name: 'emacs', + aliases: ['el', 'elisp', 'emacs'], + }, + { + name: 'elixir', + aliases: ['elixir'], + }, + { + name: 'haskell', + aliases: ['haskell', 'hs'], + }, + { + name: 'go', + aliases: ['go'], + }, + { + name: 'java', + aliases: ['java'], + }, + { + name: 'javascript', + aliases: ['javascript', 'js', 'node'], + }, + { + name: 'jelly', + aliases: ['jelly'], + }, + { + name: 'julia', + aliases: ['jl', 'julia'], + }, + { + name: 'kotlin', + aliases: ['kotlin'], + }, + { + name: 'lua', + aliases: ['lua'], + }, + { + name: 'paradoc', + aliases: ['paradoc'], + }, + { + name: 'perl', + aliases: ['perl'], + }, + { + name: 'php', + aliases: ['php', 'php3', 'php4', 'php5'], + }, + { + name: 'python3', + aliases: ['py', 'py3', 'python', 'python3'], + }, + { + name: 'python2', + aliases: ['python2'], + }, + { + name: 'r', + aliases: ['r'], + }, + { + name: 'rust', + aliases: ['rs', 'rust'], + }, + { + name: 'swift', + aliases: ['swift'], + }, + { + name: 'typescript', + aliases: ['ts', 'typescript'], + }, +]; diff --git a/api/start b/api/start index 9cf6e69..fe2024e 100755 --- a/api/start +++ b/api/start @@ -1,3 +1,3 @@ #!/usr/bin/env bash -go run main.go $* +node src diff --git a/lxc/execute b/lxc/execute index ba81715..c33d7f2 100755 --- a/lxc/execute +++ b/lxc/execute @@ -40,104 +40,10 @@ else fi exec 200>&- -bin= -case "$lang" in -"awk") - bin=awk - ;; -"bash") - bin=bash - ;; -"brainfuck" | "bf") - bin=brainfuck - ;; -"c") - bin=c - ;; -"cpp" | "c++") - bin=cpp - ;; -"csharp" | "cs" | "c#") - bin=csharp - ;; -"elixir" | "exs") - bin=elixir - ;; -"go") - bin=go - ;; -"haskell" | "hs") - bin=haskell - ;; -"java") - bin=java - ;; -"jelly") - bin=jelly - ;; -"julia" | "jl") - bin=julia - ;; -"kotlin") - bin=kotlin - ;; -"lua") - bin=lua - ;; -"nasm" | "asm") - bin=nasm - ;; -"nasm64" | "asm64") - bin=nasm64 - ;; -"node" | "js" | "javascript") - bin=node - ;; -"deno" | "denojs" | "denots") - bin=deno - ;; -"paradoc") - bin=paradoc - ;; -"perl") - bin=perl - ;; -"php") - bin=php - ;; -"python2") - bin=python2 - ;; -"python3" | "python") - bin=python3 - ;; -"ruby") - bin=ruby - ;; -"rust") - bin=rust - ;; -"swift") - bin=swift - ;; -"emacs" | "elisp" | "el") - bin=emacs - ;; -"bash") - bin=bash - ;; -"typescript" | "ts") - bin=typescript - ;; -*) - echo "invalid language" - exit -esac - # runner timeout -s KILL 20 \ lxc-attach --clear-env -n piston -- \ - /bin/bash -l -c "bash /exec/$bin $newinc $epoch" + /bin/bash -l -c "bash /exec/$lang $newinc $epoch" # process janitor lxc-attach --clear-env -n piston -- \