piston/api/main.go

63 lines
1.2 KiB
Go

package main
import (
"bytes"
"fmt"
"time"
"encoding/json"
"net/http"
"io/ioutil"
"os/exec"
"strings"
)
type script struct {
Language string `json:"language"`
Source string `json:"source"`
}
type result 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
script := script{}
message := json.NewDecoder(req.Body)
message.Decode(&script)
// write the code to temp dir
filename := fmt.Sprintf("/tmp/%d.code", time.Now().UnixNano())
ioutil.WriteFile(filename, []byte(script.Source), 0644)
// set up the execution
cmd := exec.Command("../docker/execute", script.Language, filename)
// capture out/err
var stdout, stderr bytes.Buffer
cmd.Stdout = &stdout
cmd.Stderr = &stderr
err := cmd.Run()
// prepare response
data := result{
Ran: err == nil,
Output: strings.TrimSpace(stdout.String()),
}
response, _ := json.Marshal(data)
res.Write(response)
}