Major Refactoring

- Move components to separate packages
- Fix HTTP header for 401 response
- Add documentation

handlers/handlers.go

@@ -0,0 +1,87 @@
+package handlers
+
+import (
+	"encoding/json"
+	"io"
+	"log"
+	"net/http"
+	"strconv"
+	"time"
+
+	"gitlab.hamburg.ccc.de/ccchh/spaceapid/types"
+)
+
+func Root(resp *types.SpaceAPIResponseV14) func(http.ResponseWriter, *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		// Check if GET method
+		if r.Method != http.MethodGet {
+			log.Println("Wrong METHOD from", r.RemoteAddr)
+			w.Header().Set("Allow", http.MethodGet)
+			w.WriteHeader(http.StatusMethodNotAllowed)
+			return
+		}
+
+		// Serialize response
+		response, err := json.Marshal(resp)
+		if err != nil {
+			log.Println("Failed to serialize JSON response:", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+
+		// Respond with OK
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write(response)
+	}
+}
+
+func StateOpen(
+	validUsername, validPassword string, resp *types.SpaceAPIResponseV14,
+) func(http.ResponseWriter, *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		// Check BasicAuth credentials
+		username, password, ok := r.BasicAuth()
+		if !ok || username != validUsername || password != validPassword {
+			log.Println("Unauthorized request from", r.RemoteAddr)
+			w.Header().Set("WWW-Authenticate", "Basic realm=\"space-api\"")
+			w.WriteHeader(http.StatusUnauthorized)
+			return
+		}
+
+		// Check if PUT method
+		if r.Method != http.MethodPut {
+			log.Println("Wrong METHOD from", r.RemoteAddr)
+			w.Header().Set("Allow", http.MethodPut)
+			w.WriteHeader(http.StatusMethodNotAllowed)
+			return
+		}
+
+		// Read request body
+		body, err := io.ReadAll(r.Body)
+		if err != nil {
+			log.Println("Failed to read request body from", r.RemoteAddr)
+			w.WriteHeader(http.StatusInternalServerError)
+			_, _ = io.WriteString(w, "Failed reading HTTP request body")
+			return
+		}
+
+		// Parse request body
+		newState, err := strconv.ParseBool(string(body))
+		if err != nil {
+			log.Println("Failed to parse request body from", r.RemoteAddr)
+			w.WriteHeader(http.StatusBadRequest)
+			_, _ = io.WriteString(w, "HTTP request body should either be true or false")
+			return
+		}
+
+		// Set SpaceAPI response values
+		resp.State.Open = newState
+		resp.State.LastChange = time.Now().Unix()
+
+		// Respond with OK
+		w.WriteHeader(http.StatusOK)
+		_, _ = io.WriteString(w, "Update Successful")
+	}
+}