Added access log to server and modified mock-fts to use it

internal/cli/serve/command.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log"
 	"log/slog"
 	"os"
 	"os/signal"
@@ -14,6 +15,7 @@ import (
 	"github.com/spf13/cobra"
 
 	"git.avsdev.uk/Go/job-search/internal/cli"
+	"git.avsdev.uk/Go/job-search/internal/logging"
 	"git.avsdev.uk/Go/job-search/internal/server"
 )
 
@@ -32,13 +34,14 @@ WebSocket endpoint under /ws.`,
 			slog.Debug("command persistent post-run", "command", "serve")
 		},
 		Args: cobra.NoArgs,
-		RunE: func(cmd *cobra.Command, _ []string) error {
+		RunE: func(cmd *cobra.Command, _ []string) (err error) {
 			slog.Debug("command run", "command", "serve")
 
 			addrOverride, _ := cmd.Flags().GetString("listen")
 			hostOverride, _ := cmd.Flags().GetString("host")
 			portOverride, _ := cmd.Flags().GetInt("port")
 			foreground, _ := cmd.Flags().GetBool("foreground")
+			accessLogOverride, _ := cmd.Flags().GetString("access-log")
 
 			if addrOverride != "" {
 				listenParts := strings.Split(addrOverride, ":")
@@ -47,12 +50,11 @@ WebSocket endpoint under /ws.`,
 						"--listen should be in the format of 127.0.0.1:9393",
 					)
 				}
-				port, err := strconv.Atoi(listenParts[1])
+				portOverride, err = strconv.Atoi(listenParts[1])
 				if err != nil {
 					return fmt.Errorf("failed to parse --listen port: %w", err)
 				}
 				hostOverride = listenParts[0]
-				portOverride = port
 			}
 
 			conf, err := opts.RunSetup(cmd, true, foreground)
@@ -66,6 +68,27 @@ WebSocket endpoint under /ws.`,
 			if hostOverride != "" {
 				conf.Server.Host = hostOverride
 			}
+			if cmd.Flags().Changed("access-log") {
+				conf.Server.AccessLog = accessLogOverride
+			}
+
+			var options []server.Option
+			if conf.Server.AccessLog != "" {
+				var (
+					accessLog      *log.Logger
+					closeAccessLog func() error
+				)
+				accessLog, closeAccessLog, err = logging.OpenAccessLog(
+					conf.Server.AccessLog,
+				)
+				if err != nil {
+					return err
+				}
+				defer func() {
+					err = errors.Join(err, closeAccessLog())
+				}()
+				options = append(options, server.WithAccessLog(accessLog))
+			}
 
 			// ctx is cancelled on the first SIGINT (Ctrl+C) or SIGTERM.
 			ctx, stop := signal.NotifyContext(
@@ -80,7 +103,7 @@ WebSocket endpoint under /ws.`,
 				stop()
 			}()
 
-			appServer, err := server.New(&conf.Server)
+			appServer, err := server.New(&conf.Server, options...)
 			if err != nil {
 				return err
 			}
@@ -98,6 +121,12 @@ WebSocket endpoint under /ws.`,
 	)
 	flags.Int("port", 0, "listen address (default from config, 9393)")
 	flags.Bool("foreground", false, "run in the foreground")
+	flags.String(
+		"access-log",
+		"",
+		`access log file, or "-" for stdout; "" for none `+
+			"(default from config, server.access_log)",
+	)
 	cmd.MarkFlagsMutuallyExclusive("listen", "host")
 	cmd.MarkFlagsMutuallyExclusive("listen", "port")