Rename frontend as receiver

receiver/submissions.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"os"
+	"path"
+	"strings"
+)
+
+type submissionHandler func(w http.ResponseWriter, r *http.Request, sURL []string)
+
+type submissionChecker struct {
+	kind string
+	next submissionHandler
+}
+
+type submissionTeamHandler func(w http.ResponseWriter, r *http.Request, team string, sURL []string)
+
+type submissionTeamChecker struct {
+	kind      string
+	next      submissionTeamHandler
+	teamsDir  string
+	simulator string
+}
+
+func (c submissionChecker) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if addr := r.Header.Get("X-Forwarded-For"); addr != "" {
+		r.RemoteAddr = addr
+	}
+	team := "-"
+	if t := r.Header.Get("X-FIC-Team"); t != "" {
+		team = t
+	}
+	log.Printf("%s %s \"%s %s\" => %s [%s]\n", r.RemoteAddr, team, r.Method, r.URL.Path, c.kind, r.UserAgent())
+
+	w.Header().Set("Content-Type", "application/json")
+
+	// Check request type and size
+	if r.Method != "POST" || r.ContentLength < 0 {
+		http.Error(w, "{\"errmsg\":\"Requête invalide.\"}", http.StatusBadRequest)
+		return
+	} else if r.ContentLength > 4097 {
+		http.Error(w, "{\"errmsg\":\"Requête trop longue\"}", http.StatusRequestEntityTooLarge)
+		return
+	}
+
+	// Extract URL arguments
+	var sURL = strings.Split(strings.TrimPrefix(r.URL.Path, "/"), "/")
+
+	c.next(w, r, sURL)
+}
+
+func (c submissionTeamChecker) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	submissionChecker{c.kind, func(w http.ResponseWriter, r *http.Request, sURL []string) {
+		team := c.simulator
+		if t := r.Header.Get("X-FIC-Team"); t != "" {
+			team = t
+		}
+
+		// Check team validity and existance
+		if len(team) < 1 || team == "-" || team == "public" {
+			log.Println("INVALID TEAM:", team)
+			http.Error(w, "{\"errmsg\":\"Équipe inexistante.\"}", http.StatusBadRequest)
+			return
+		} else if _, err := os.Stat(path.Join(c.teamsDir, team)); os.IsNotExist(err) {
+			log.Println("UNKNOWN TEAM:", team)
+			http.Error(w, "{\"errmsg\":\"Équipe inexistante.\"}", http.StatusBadRequest)
+			return
+		}
+
+		c.next(w, r, team, sURL)
+	}}.ServeHTTP(w, r)
+}