eg

server/handler/parse.go

@@ -0,0 +1,39 @@
+package handler
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+)
+
+func getStrParam(r *http.Request, key string) string {
+	return r.URL.Query().Get(key)
+}
+
+func getStrParamOr(r *http.Request, key, or string) string {
+	val := getStrParam(r, key)
+	if val == "" {
+		return or
+	}
+	return val
+}
+
+func getIntParam(r *http.Request, key string) (int, error) {
+	strVal := r.URL.Query().Get(key)
+	if strVal == "" {
+		return 0, fmt.Errorf("no param with key `%s`", key)
+	}
+	val, err := strconv.Atoi(strVal)
+	if err != nil {
+		return 0, fmt.Errorf("not an int `%s`", strVal)
+	}
+	return val, nil
+}
+
+func getIntParamOr(r *http.Request, key string, or int) int {
+	val, err := getIntParam(r, key)
+	if err != nil {
+		return or
+	}
+	return val
+}