moth/handlers.go

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package main
import (
"fmt"
"net/http"
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"os"
"regexp"
"strings"
"strconv"
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)
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func registerHandler(w http.ResponseWriter, req *http.Request) {
teamname := req.FormValue("n")
teamid := req.FormValue("h")
if matched, _ := regexp.MatchString("[^0-9a-z]", teamid); matched {
teamid = ""
}
if (teamid == "") || (teamname == "") {
showPage(w, "Invalid Entry", "Oops! Are you sure you got that right?")
return
}
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if ! anchoredSearch(statePath("teamids.txt"), teamid, 0) {
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showPage(w, "Invalid Team ID", "I don't have a record of that team ID. Maybe you used capital letters accidentally?")
return
}
f, err := os.OpenFile(statePath("state", teamid), os.O_CREATE|os.O_EXCL|os.O_WRONLY, 0644)
if err != nil {
showPage(
w,
"Registration failed",
"Unable to register. Perhaps a teammate has already registered?",
)
return
}
defer f.Close()
fmt.Fprintln(f, teamname)
showPage(w, "Success", "Okay, your team has been named and you may begin using your team ID!")
}
func tokenHandler(w http.ResponseWriter, req *http.Request) {
teamid := req.FormValue("t")
token := req.FormValue("k")
// Check answer
if ! anchoredSearch(token, statePath("tokens.txt"), 0) {
showPage(w, "Unrecognized token", "I don't recognize that token. Did you type in the whole thing?")
return
}
parts := strings.Split(token, ":")
category := ""
pointstr := ""
if len(parts) >= 2 {
category = parts[0]
pointstr = parts[1]
}
points, err := strconv.Atoi(pointstr)
if err != nil {
points = 0
}
// Defang category name; prevent directory traversal
if matched, _ := regexp.MatchString("^[A-Za-z0-9_-]", category); matched {
category = ""
}
if (category == "") || (points == 0) {
showPage(w, "Unrecognized token", "Something doesn't look right about that token")
return
}
if err := awardPoints(teamid, category, points); err != nil {
showPage(w, "Error awarding points", err.Error())
return
}
showPage(w, "Points awarded", fmt.Sprintf("%d points for %s!", points, teamid))
}
func answerHandler(w http.ResponseWriter, req *http.Request) {
teamid := req.FormValue("t")
category := req.FormValue("c")
pointstr := req.FormValue("p")
answer := req.FormValue("a")
points, err := strconv.Atoi(pointstr)
if err != nil {
points = 0
}
// Defang category name; prevent directory traversal
if matched, _ := regexp.MatchString("^[A-Za-z0-9_-]", category); matched {
category = ""
}
// Check answer
needle := fmt.Sprintf("%s %s", points, answer)
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haystack := cachePath(category, "answers.txt")
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if ! anchoredSearch(haystack, needle, 0) {
showPage(w, "Wrong answer", err.Error())
}
if err := awardPoints(teamid, category, points); err != nil {
showPage(w, "Error awarding points", err.Error())
return
}
showPage(w, "Points awarded", fmt.Sprintf("%d points for %s!", points, teamid))
}
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func puzzlesHandler(w http.ResponseWriter, req *http.Request) {
puzzles := map[string][]interface{}{}
// v := map[string][]interface{}{"Moo": {1, "0177f85ae895a33e2e7c5030c3dc484e8173e55c"}}
// j, _ := json.Marshal(v)
for _, category := range categories {
}
}
func pointsHandler(w http.ResponseWriter, req *http.Request) {
}
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// staticHandler serves up static files.
func rootHandler(w http.ResponseWriter, req *http.Request) {
if req.URL.Path == "/" {
showPage(
w,
"Welcome",
`
<h2>Register your team</h2>
<form action="register" action="post">
Team ID: <input name="h"> <br>
Team name: <input name="n">
<input type="submit" value="Register">
</form>
<div>
If someone on your team has already registered,
proceed to the
<a href="puzzles">puzzles overview</a>.
</div>
`,
)
return
}
http.NotFound(w, req)
}