Created
October 26, 2017 18:33
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Simple request reader and poster, with IP Banning, for workshop #1
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| package main | |
| import ( | |
| "fmt" | |
| "io" | |
| "io/ioutil" | |
| "log" | |
| "net/http" | |
| "regexp" | |
| ) | |
| const IPBANS = true | |
| var ipBanWords = regexp.MustCompile("fuck|shit|bitch") | |
| var bannedIPs = make(map[string]bool) | |
| func main() { | |
| trickMux := http.NewServeMux() | |
| trickMux.HandleFunc("/", defaultHandler) | |
| go http.ListenAndServe(":80", trickMux) | |
| realMux := http.NewServeMux() | |
| realMux.HandleFunc("/", handler) | |
| http.ListenAndServe(":8000", realMux) | |
| } | |
| func defaultHandler(w http.ResponseWriter, r *http.Request) { | |
| io.WriteString(w, "Hey friend! You've actually gotta hit port 8000 to post a message.") | |
| } | |
| func handler(w http.ResponseWriter, r *http.Request) { | |
| ipaddr := r.RemoteAddr | |
| // Handle BANS | |
| fmt.Println(bannedIPs) | |
| if IPBANS { | |
| if bannedIPs[ipaddr] { | |
| log.Println("user", ipaddr, "tried to request, after being banned") | |
| io.WriteString(w, "Hey buckaroo, you're BANNED! Let's not sabotage this workshop.") | |
| return | |
| } | |
| } | |
| // Handle wrong REST method | |
| if r.Method != "POST" { | |
| io.WriteString(w, "Hey, you've got to send a POST request using curl, to send data.") | |
| return | |
| } | |
| // Handle message reading | |
| messageByte, err := ioutil.ReadAll(r.Body) | |
| if err != nil { | |
| fmt.Println(err) | |
| io.WriteString(w, "wow I think you messed something up") | |
| return | |
| } | |
| message := string(messageByte) | |
| // Handle empty messages | |
| if message == "" { | |
| io.WriteString(w, "Hey, you didn't post anything, friend! Try looking into the -d flag in curl.") | |
| return | |
| } | |
| // Handle bad words | |
| if ipBanWords.MatchString(message) { | |
| if IPBANS { | |
| bannedIPs[ipaddr] = true | |
| log.Println("user", ipaddr, "is an edgy teen and has been IPBANNED") | |
| io.WriteString(w, "Not very nice, friendo, you're banned!") | |
| return | |
| } | |
| log.Println("user", ipaddr, "is an edgy teen") | |
| io.WriteString(w, "Not very nice, friendo") | |
| return | |
| } | |
| // Actually post a message | |
| log.Printf("user %s wrote `%s`", ipaddr, message) | |
| // Server response | |
| io.WriteString(w, "Nice! You successfully posted!") | |
| } |
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