From go language. Cloud power
1 package main 2 3 import ( 4 "io" 5 "log" 6 "net/http" 7 "os" 8 "os/exec" 9 "strconv" 10 ) 11 12 var uniq = make(chan int) 13 14 func init() { 15 go func() { 16 for i := 0; ; i++ { 17 uniq <- i 18 } 19 }() 20 } 21 22 func main() { 23 if err := os.Chdir(os.TempDir()); err != nil { 24 log.Fatal(err) 25 } 26 27 http.HandleFunc("/", FrontPage) 28 http.HandleFunc("/compile", Compile) 29 log.Fatal(http.ListenAndServe("127.0.0.1:1234", nil)) 30 } 31 32 func FrontPage(w http.ResponseWriter, _ *http.Request) { 33 w.Write([]byte(frontPage)) 34 } 35 36 func err(w http.ResponseWriter, e error) bool { 37 if e != nil { 38 w.Write([]byte(e.Error())) 39 return true 40 } 41 return false 42 } 43 44 func Compile(w http.ResponseWriter, req *http.Request) { 45 x := "play_" + strconv.Itoa(<-uniq) + ".go" 46 47 f, e := os.Create(x) 48 if err(w, e) { 49 return 50 } 51 52 defer os.Remove(x) 53 defer f.Close() 54 55 _, e = io.Copy(f, req.Body) 56 if err(w, e) { 57 return 58 } 59 f.Close() 60 61 cmd := exec.Command("go", "run", x) 62 o, e := cmd.CombinedOutput() 63 if err(w, e) { 64 return 65 } 66 67 w.Write(o) 68 } 69 70 const frontPage = `<!doctype html> 71
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