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package main
import (
"flag"
"fmt"
"html/template"
"io/ioutil"
"log"
"net/http"
"strconv"
"strings"
"github.com/gorilla/mux"
)
var (
port *int
)
func registerHTTPFlags() {
port = flag.Int("port", 8080, "The port for HTTP")
}
func setupHTTPServer() http.Server {
r := mux.NewRouter()
r.HandleFunc("/", indexHandler)
r.HandleFunc("/create", createGetHandler).Methods("GET")
r.HandleFunc("/create", createPostHandler).Methods("POST")
r.HandleFunc("/view", viewGetHandler).Methods("GET")
r.HandleFunc("/edit", editGetHandler).Methods("GET")
r.HandleFunc("/edit", editPostHandler).Methods("POST")
return http.Server{
Addr: fmt.Sprintf("0.0.0.0:%d", *port),
Handler: r,
}
}
// Host the index file
func indexHandler(w http.ResponseWriter, r *http.Request) {
readFileToResponse(w, "/index.html")
}
func createGetHandler(w http.ResponseWriter, r *http.Request) {
log.Println("create GET")
readFileToResponse(w, "/create.html")
}
// createPostHandler handles HTTP POST requests to the /create endpoint creating
// new challenges in the database
func createPostHandler(w http.ResponseWriter, r *http.Request) {
// parse the Post Request form
r.ParseForm()
points, err := strconv.ParseInt(r.Form.Get("challengePoints"), 10, 64)
if err != nil {
log.Printf("Could not parse points: %v", err)
return
}
var static bool
if r.Form.Get("challengeStatic") == "on" {
static = true
} else if r.Form.Get("challengeStatic") == "off" {
static = false
} else {
log.Println("Could not parse static: %v", r.Form.Get("challengeStatic"))
return
}
// Define the new challenge
newChallenge := Challenge{
Name: r.Form.Get("challengeName"),
Description: r.Form.Get("challengeDescription"),
Flag: r.Form.Get("challengeFlag"),
Container: r.Form.Get("challengeContainer"),
Category: r.Form.Get("challengeCategory"),
Points: int(points),
Static: static,
}
// Create the new challenge in the database
uuid, err := dbNewChallenge(newChallenge)
if err != nil {
log.Println(err)
return
}
log.Printf("Create a new challenge. UUID: %s", uuid)
}
// viewGetHandler returns a list of all challenges in the database
func viewGetHandler(w http.ResponseWriter, r *http.Request) {
// get all challenges from the db
challs := getAllChallenges(db)
// define a challenges struct storing the challenges.
// This struct can be used in a template
challenges := Challenges{}
for _, chal := range challs {
challenges.Challenge = append(challenges.Challenge, chal)
}
// define a new template to render the challenges in
t := template.New("")
t, err := t.ParseFiles("./hosted/view.html")
if err != nil {
log.Println(err)
return
}
// execure the template using the challenges struct
t.ExecuteTemplate(w, "view", challenges)
}
func editGetHandler(w http.ResponseWriter, r *http.Request) {
var uuid string
if r.URL.Query()["uuid"] == nil {
log.Println("no uuid given")
// redirect the user to the view page for selecting what challenge to edit
viewGetHandler(w, r)
return
}
uuid = r.URL.Query()["uuid"][0]
log.Printf("fetching challenge with the uuid %s", uuid)
chall, err := dbGetChallengeByUUID(uuid)
if err != nil {
log.Println(err)
}
// define a new template to render the challenges in
t := template.New("")
t, err = t.ParseFiles("./hosted/edit_uuid.html")
if err != nil {
log.Println(err)
return
}
// execute the template using the challenges struct
t.ExecuteTemplate(w, "edit_uuid", chall)
return
}
func editPostHandler(w http.ResponseWriter, r *http.Request) {
log.Println("edit POST")
// parse the Post Request form
err := r.ParseForm()
if err != nil {
log.Println("could not parse the http post form!")
return
}
// parse the challenge points
points, err := strconv.ParseInt(r.PostFormValue("challengePoints"), 10, 64)
if err != nil {
log.Printf("Could not parse points: %v (%#v)", err, r.Form.Get("challengePoints"))
return
}
// parse the static value
var static bool
if r.Form.Get("challengeStatic") == "true" {
static = true
} else if r.Form.Get("challengeStatic") == "false" {
static = false
} else {
log.Println("[edit POST] Could not parse static: %v", r.Form.Get("challengeStatic"))
return
}
// define the new edited challenge
editedChallenge := Challenge{
UUID: r.Form.Get("challengeUUID"),
Name: r.Form.Get("challengeName"),
Description: r.Form.Get("challengeDescription"),
Flag: r.Form.Get("challengeFlag"),
Container: r.Form.Get("challengeContainer"),
Category: r.Form.Get("challengeCategory"),
Points: int(points),
Static: static,
}
// update the challenge in the database
editChallengeUUID(r.Form.Get("challengeUUID"), editedChallenge)
log.Println("done editing challenge!")
http.Redirect(w, r, "/edit", http.StatusSeeOther)
}
// Helper function to host files off of "hosted/" directory
func readFileToResponse(w http.ResponseWriter, path string) {
requestedFile := strings.Replace(path, "..", "", -1)
contents, readError := ioutil.ReadFile(fmt.Sprintf("hosted/%s", requestedFile))
if readError != nil {
w.Write([]byte(fmt.Sprintf("unable to read %s", requestedFile)))
} else {
w.Write([]byte(contents))
}
}
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