Timeout after 10 seconds on FetchDepartures

Also apply gofmt

README.md

@@ -2,7 +2,7 @@
 
 ## TODO
 
-- [ ] Use timeout for fetching departures
+- [x] Use timeout for fetching departures
 - [ ] Write ESP8266 client
 - [ ] Add basic auth
 - [ ] Create Nix package

main.go

@@ -7,6 +7,7 @@ import "net/http"
 import "net/url"
 import "slices"
 import "strconv"
+import "time"
 
 type DMResponse struct {
 	Departures []DMDeparture `json:"departureList"`
@@ -38,7 +39,6 @@ type DMDateTime struct {
 	Minute string `json:"minute"`
 }
 
-// TODO: Use different client (with timeout)
 func FetchDepartures(stopId string) (*DMResponse, error) {
 	// Create request object
 	req, err := http.NewRequest("GET", "https://www.vrn.de/mngvrn/XML_DM_REQUEST", nil)
@@ -61,8 +61,11 @@ func FetchDepartures(stopId string) (*DMResponse, error) {
 	query.Set("useRealtime", "1")
 	req.URL.RawQuery = query.Encode()
 
-    // Send the request
-    res, err := http.DefaultClient.Do(req)
+	// Send the request, wait max 10 seconds
+	client := http.Client{
+		Timeout: 10 * time.Second,
+	}
+	res, err := client.Do(req)
 	if err != nil {
 		return nil, err
 	}
@@ -92,7 +95,6 @@ func main() {
 			platform = &query["platform"][0]
 		}
 
-
 		ds, err := FetchDepartures(stopId)
 		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)