108 lines
2.2 KiB
Go
108 lines
2.2 KiB
Go
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"os/exec"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
type inbound struct {
|
|
Language string `json:"language"`
|
|
Source string `json:"source"`
|
|
}
|
|
|
|
type problem struct {
|
|
Code string `json:"code"`
|
|
Message string `json:"message"`
|
|
}
|
|
|
|
type outbound struct {
|
|
Ran bool `json:"ran"`
|
|
Output string `json:"output"`
|
|
}
|
|
|
|
func main() {
|
|
http.HandleFunc("/execute", Execute)
|
|
|
|
http.ListenAndServe("0.0.0.0:1337", nil)
|
|
}
|
|
|
|
func Execute(res http.ResponseWriter, req *http.Request) {
|
|
res.Header().Set("Content-Type", "application/json")
|
|
|
|
// get json
|
|
inbound := inbound{}
|
|
message := json.NewDecoder(req.Body)
|
|
message.Decode(&inbound)
|
|
|
|
whitelist := []string{
|
|
"python", "python2", "python3",
|
|
"ruby",
|
|
"javascript", "js", "node",
|
|
"c",
|
|
"cpp", "c++",
|
|
"go",
|
|
"r",
|
|
"php",
|
|
"c#", "csharp", "cs",
|
|
"nasm", "asm",
|
|
}
|
|
|
|
// 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",
|
|
}
|
|
|
|
pres, _ := json.Marshal(problem)
|
|
|
|
res.Write(pres)
|
|
}
|
|
|
|
func launch(request inbound, res http.ResponseWriter) {
|
|
var ext string = "code";
|
|
|
|
if request.Language == "go" {
|
|
ext = "go"
|
|
}
|
|
|
|
// write the code to temp dir
|
|
filename := fmt.Sprintf("/tmp/%d." + ext, time.Now().UnixNano())
|
|
|
|
ioutil.WriteFile(filename, []byte(request.Source), 0644)
|
|
|
|
// set up the execution
|
|
cmd := exec.Command("../docker/execute", request.Language, filename)
|
|
|
|
// capture out/err
|
|
var stdout, stderr bytes.Buffer
|
|
cmd.Stdout = &stdout
|
|
cmd.Stderr = &stderr
|
|
|
|
err := cmd.Run()
|
|
|
|
// prepare response
|
|
outbound := outbound{
|
|
Ran: err == nil,
|
|
Output: strings.TrimSpace(stdout.String()),
|
|
}
|
|
|
|
response, _ := json.Marshal(outbound)
|
|
|
|
res.Write(response)
|
|
}
|