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Rip out go, add aliases to /versions

This commit is contained in:
Vrganj 2021-01-14 20:14:26 +01:00
parent 20d659e5a6
commit 77e645beb3
8 changed files with 1346 additions and 302 deletions
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1
api/.gitignore vendored Normal file
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node_modules

413
api/main.go
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@ -1,302 +1,303 @@
package main package main
import ( import (
"bytes" "bytes"
"encoding/json" "encoding/json"
"fmt" "fmt"
"io/ioutil" "io/ioutil"
"net/http" "net/http"
"os/exec" "os/exec"
"regexp" "regexp"
"strings" "strings"
"time" "time"
) )
type Inbound struct { type Inbound struct {
Language string `json:"language"` Language string `json:"language"`
Source string `json:"source"` Source string `json:"source"`
Args []string `json:"args"` Args []string `json:"args"`
} }
type Problem struct { type Problem struct {
Code string `json:"code"` Code string `json:"code"`
Message string `json:"message"` Message string `json:"message"`
} }
type Outbound struct { type Outbound struct {
Ran bool `json:"ran"` Ran bool `json:"ran"`
Language string `json:"language"` Language string `json:"language"`
Version string `json:"version"` Version string `json:"version"`
Output string `json:"output"` Output string `json:"output"`
Stdout string `json:"stdout"` Stdout string `json:"stdout"`
Stderr string `json:"stderr"` Stderr string `json:"stderr"`
} }
type Language struct { type Language struct {
Name string `json:"name,omitempty"` Name string `json:"name,omitempty"`
Version string `json:"version,omitempty"` Version string `json:"version,omitempty"`
Aliases []string `json:"aliases,omitempty"`
} }
var instance int var instance int
var languages []Language var languages []Language
func main() { func main() {
port := "2000" port := "2000"
var err error var err error
languages, err = UpdateVersions() languages, err = UpdateVersions()
if err != nil { if err != nil {
fmt.Println("could not get version info and therefore couldn't start") fmt.Println("could not get version info and therefore couldn't start")
fmt.Println(err) fmt.Println(err)
return return
} }
fmt.Println("starting api on port", port) fmt.Println("starting api on port", port)
http.HandleFunc("/execute", Execute) http.HandleFunc("/execute", Execute)
http.HandleFunc("/versions", Versions) http.HandleFunc("/versions", Versions)
http.ListenAndServe(":"+port, nil) http.ListenAndServe(":"+port, nil)
} }
func Execute(res http.ResponseWriter, req *http.Request) { func Execute(res http.ResponseWriter, req *http.Request) {
res.Header().Set("Content-Type", "application/json") res.Header().Set("Content-Type", "application/json")
// get json // get json
inbound := Inbound{} inbound := Inbound{}
message := json.NewDecoder(req.Body) message := json.NewDecoder(req.Body)
message.Decode(&inbound) message.Decode(&inbound)
whitelist := []string{ whitelist := []string{
"awk", "awk",
"bash", "bash",
"brainfuck", "bf", "brainfuck", "bf",
"c", "c",
"cpp", "c++", "cpp", "c++",
"csharp", "cs", "c#", "csharp", "cs", "c#",
"deno", "denojs", "denots", "deno", "denojs", "denots",
"elixir", "exs", "elixir", "exs",
"emacs", "elisp", "el", "emacs", "elisp", "el",
"go", "go",
"haskell", "hs", "haskell", "hs",
"java", "java",
"jelly", "jelly",
"julia", "jl", "julia", "jl",
"kotlin", "kotlin",
"lua", "lua",
"nasm", "asm", "nasm", "asm",
"nasm64", "asm64", "nasm64", "asm64",
"node", "javascript", "js", "node", "javascript", "js",
"perl", "pl", "perl", "pl",
"php", "php",
"python2", "python2",
"python3", "python", "python3", "python",
"paradoc", "paradoc",
"ruby", "ruby",
"rust", "rust",
"swift", "swift",
"typescript", "ts", "typescript", "ts",
} }
// check if the supplied language is supported // check if the supplied language is supported
// now calls function and returns // now calls function and returns
for _, lang := range whitelist { for _, lang := range whitelist {
if lang == inbound.Language { if lang == inbound.Language {
launch(inbound, res) launch(inbound, res)
return return
} }
} }
// now only called when the language is not supported // now only called when the language is not supported
problem := Problem{ problem := Problem{
Code: "unsupported_language", Code: "unsupported_language",
Message: inbound.Language + " is not supported by Piston", Message: inbound.Language + " is not supported by Piston",
} }
pres, _ := json.Marshal(problem) pres, _ := json.Marshal(problem)
res.WriteHeader(http.StatusBadRequest) res.WriteHeader(http.StatusBadRequest)
res.Write(pres) res.Write(pres)
} }
func Versions(res http.ResponseWriter, req *http.Request) { 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 { type StdWriter struct {
combined *string combined *string
separate *string separate *string
} }
func (writer *StdWriter) Write(data []byte) (int, error) { func (writer *StdWriter) Write(data []byte) (int, error) {
*writer.combined += string(data) *writer.combined += string(data)
*writer.separate += string(data) *writer.separate += string(data)
return len(data), nil return len(data), nil
} }
func launch(request Inbound, res http.ResponseWriter) { func launch(request Inbound, res http.ResponseWriter) {
stamp := time.Now().UnixNano() stamp := time.Now().UnixNano()
// write the code to temp dir // write the code to temp dir
srcfile := fmt.Sprintf("/tmp/%d.code", stamp) 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 // set up the arguments to send to the execute command
cmd := exec.Command("../lxc/execute", request.Language, srcfile, strings.Join(request.Args, "\n")) cmd := exec.Command("../lxc/execute", request.Language, srcfile, strings.Join(request.Args, "\n"))
// capture out/err // capture out/err
var stdout, stderr, combined string var stdout, stderr, combined string
cmd.Stdout = &StdWriter{ cmd.Stdout = &StdWriter{
combined: &combined, combined: &combined,
separate: &stdout, separate: &stdout,
} }
cmd.Stderr = &StdWriter{ cmd.Stderr = &StdWriter{
combined: &combined, combined: &combined,
separate: &stderr, separate: &stderr,
} }
stdout = strings.TrimSpace(stdout) stdout = strings.TrimSpace(stdout)
stderr = strings.TrimSpace(stderr) stderr = strings.TrimSpace(stderr)
combined = strings.TrimSpace(combined) combined = strings.TrimSpace(combined)
if len(stdout) > 65536 { if len(stdout) > 65536 {
stdout = stdout[:65536] stdout = stdout[:65536]
} }
if len(stderr) > 65536 { if len(stderr) > 65536 {
stderr = stdout[:65536] stderr = stdout[:65536]
} }
if len(combined) > 65536 { if len(combined) > 65536 {
combined = combined[:65536] combined = combined[:65536]
} }
err := cmd.Run() err := cmd.Run()
// get the executing version of the language // get the executing version of the language
execlang := request.Language execlang := request.Language
switch execlang { switch execlang {
case "bf": case "bf":
execlang = "brainfuck" execlang = "brainfuck"
case "c++": case "c++":
execlang = "cpp" execlang = "cpp"
case "cs", "c#": case "cs", "c#":
execlang = "csharp" execlang = "csharp"
case "denojs", "denots": case "denojs", "denots":
execlang = "deno" execlang = "deno"
case "el", "elisp": case "el", "elisp":
execlang = "emacs" execlang = "emacs"
case "exs": case "exs":
execlang = "elixir" execlang = "elixir"
case "hs": case "hs":
execlang = "haskell" execlang = "haskell"
case "asm": case "asm":
execlang = "nasm" execlang = "nasm"
case "asm64": case "asm64":
execlang = "nasm64" execlang = "nasm64"
case "js", "javascript": case "js", "javascript":
execlang = "node" execlang = "node"
case "jl": case "jl":
execlang = "julia" execlang = "julia"
case "python": case "python":
execlang = "python3" execlang = "python3"
case "ts": case "ts":
execlang = "typescript" execlang = "typescript"
} }
// prepare response // prepare response
outbound := Outbound{ outbound := Outbound{
Ran: err == nil, Ran: err == nil,
Language: request.Language, Language: request.Language,
Version: "", Version: "",
Output: combined, Output: combined,
Stdout: stdout, Stdout: stdout,
Stderr: stderr, Stderr: stderr,
} }
// retrieve the language version // retrieve the language version
for _, lang := range languages { for _, lang := range languages {
if lang.Name == execlang { if lang.Name == execlang {
outbound.Version = lang.Version outbound.Version = lang.Version
break break
} }
} }
response, _ := json.Marshal(outbound) response, _ := json.Marshal(outbound)
res.Write(response) res.Write(response)
} }
func UpdateVersions() ([]Language, error) { func UpdateVersions() ([]Language, error) {
langs, err := GetVersions() langs, err := GetVersions()
if err != nil { if err != nil {
return nil, err return nil, err
} }
return langs, nil return langs, nil
} }
// get all the language and their current version // get all the language and their current version
func GetVersions() ([]Language, error) { func GetVersions() ([]Language, error) {
var languages []Language var languages []Language
res, err := ExecVersionScript() res, err := ExecVersionScript()
if err != nil { if err != nil {
return nil, err return nil, err
} }
info := strings.Split(res, "---") info := strings.Split(res, "---")
for _, v := range info { for _, v := range info {
if len(v) < 2 { if len(v) < 2 {
continue continue
} }
name, version := GetVersion(v) name, version := GetVersion(v)
languages = append(languages, Language{ languages = append(languages, Language{
Name: name, Name: name,
Version: version, Version: version,
}) })
} }
return languages, nil return languages, nil
} }
// run the script that retrieves all the language versions // run the script that retrieves all the language versions
func ExecVersionScript() (string, error) { func ExecVersionScript() (string, error) {
cmd := exec.Command("../lxc/versions") cmd := exec.Command("../lxc/versions")
var stdout bytes.Buffer var stdout bytes.Buffer
cmd.Stdout = &stdout cmd.Stdout = &stdout
cmd.Stderr = &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 // return the language and its version
// most of the time it is easy to get the name and version // most of the time it is easy to get the name and version
// but for some languages helper functions are used // but for some languages helper functions are used
func GetVersion(s string) (string, string) { func GetVersion(s string) (string, string) {
lines := strings.Split(s, "\n") lines := strings.Split(s, "\n")
if lines[1] == "java" { if lines[1] == "java" {
return "java", regexp.MustCompile("([0-9]+)").FindString(lines[2]) return "java", regexp.MustCompile("([0-9]+)").FindString(lines[2])
} }
if lines[1] == "emacs" { if lines[1] == "emacs" {
return "emacs", regexp.MustCompile("([0-9]+\\.[0-9]+)").FindString(lines[2]) return "emacs", regexp.MustCompile("([0-9]+\\.[0-9]+)").FindString(lines[2])
} }
return lines[1], regexp.MustCompile("([0-9]+\\.[0-9]+\\.[0-9]+)").FindString(s) return lines[1], regexp.MustCompile("([0-9]+\\.[0-9]+\\.[0-9]+)").FindString(s)
} }

903
api/package-lock.json generated Normal file
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16
api/package.json Normal file
View File

@ -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"
}
}

99
api/src/index.js Normal file
View File

@ -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}`));

118
api/src/languages.js Normal file
View File

@ -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'],
},
];

2
api/start
View File

@ -1,3 +1,3 @@
#!/usr/bin/env bash #!/usr/bin/env bash
go run main.go $* node src

96
lxc/execute
View File

@ -40,104 +40,10 @@ else
fi fi
exec 200>&- exec 200>&-
bin=
case "$lang" in
"awk")
bin=awk
;;
"bash")
bin=bash
;;
"brainfuck" | "bf")
bin=brainfuck
;;
"c")
bin=c
;;
"cpp" | "c++")
bin=cpp
;;
"csharp" | "cs" | "c#")
bin=csharp
;;
"elixir" | "exs")
bin=elixir
;;
"go")
bin=go
;;
"haskell" | "hs")
bin=haskell
;;
"java")
bin=java
;;
"jelly")
bin=jelly
;;
"julia" | "jl")
bin=julia
;;
"kotlin")
bin=kotlin
;;
"lua")
bin=lua
;;
"nasm" | "asm")
bin=nasm
;;
"nasm64" | "asm64")
bin=nasm64
;;
"node" | "js" | "javascript")
bin=node
;;
"deno" | "denojs" | "denots")
bin=deno
;;
"paradoc")
bin=paradoc
;;
"perl")
bin=perl
;;
"php")
bin=php
;;
"python2")
bin=python2
;;
"python3" | "python")
bin=python3
;;
"ruby")
bin=ruby
;;
"rust")
bin=rust
;;
"swift")
bin=swift
;;
"emacs" | "elisp" | "el")
bin=emacs
;;
"bash")
bin=bash
;;
"typescript" | "ts")
bin=typescript
;;
*)
echo "invalid language"
exit
esac
# runner # runner
timeout -s KILL 20 \ timeout -s KILL 20 \
lxc-attach --clear-env -n piston -- \ lxc-attach --clear-env -n piston -- \
/bin/bash -l -c "bash /exec/$bin $newinc $epoch" /bin/bash -l -c "bash /exec/$lang $newinc $epoch"
# process janitor # process janitor
lxc-attach --clear-env -n piston -- \ lxc-attach --clear-env -n piston -- \