Implement error pages, improve request logging

common/services/configuration.go

@@ -0,0 +1,65 @@
+package services
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/knadh/koanf"
+	"github.com/knadh/koanf/parsers/toml"
+	"github.com/knadh/koanf/providers/confmap"
+	"github.com/knadh/koanf/providers/env"
+	"github.com/knadh/koanf/providers/file"
+	"github.com/knadh/koanf/providers/posflag"
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/pflag"
+)
+
+func ConfigureApplication(
+	logger *logrus.Logger,
+	appName string,
+	defaultConfig map[string]interface{},
+) (*koanf.Koanf, error) {
+	f := pflag.NewFlagSet("config", pflag.ContinueOnError)
+	f.Usage = func() {
+		fmt.Println(f.FlagUsages())
+		os.Exit(0)
+	}
+	f.StringSlice(
+		"conf",
+		[]string{fmt.Sprintf("%s.toml", strings.ToLower(appName))},
+		"path to one or more .toml files",
+	)
+	var err error
+
+	if err = f.Parse(os.Args[1:]); err != nil {
+		logger.Fatal(err)
+	}
+
+	config := koanf.New(".")
+
+	_ = config.Load(confmap.Provider(defaultConfig, "."), nil)
+	cFiles, _ := f.GetStringSlice("conf")
+	for _, c := range cFiles {
+		if err := config.Load(file.Provider(c), toml.Parser()); err != nil {
+			logger.Fatalf("error loading config file: %s", err)
+		}
+	}
+	if err := config.Load(posflag.Provider(f, ".", config), nil); err != nil {
+		logger.Fatalf("error loading configuration: %s", err)
+	}
+	if err := config.Load(
+		file.Provider("resource_app.toml"),
+		toml.Parser(),
+	); err != nil && !os.IsNotExist(err) {
+		logrus.Fatalf("error loading config: %v", err)
+	}
+	prefix := fmt.Sprintf("%s_", strings.ToUpper(appName))
+	if err := config.Load(env.Provider(prefix, ".", func(s string) string {
+		return strings.Replace(strings.ToLower(
+			strings.TrimPrefix(s, prefix)), "_", ".", -1)
+	}), nil); err != nil {
+		logrus.Fatalf("error loading config: %v", err)
+	}
+	return config, err
+}

common/services/i18n.go

@@ -91,6 +91,10 @@ func InitI18n(ctx context.Context, logger *log.Logger, languages []string) conte
 
 func initMessageCatalog(logger *log.Logger) *MessageCatalog {
 	messages := make(map[string]*i18n.Message)
+	messages["ErrorTitle"] = &i18n.Message{
+		ID:    "ErrorTitle",
+		Other: "An error has occurred",
+	}
 	return &MessageCatalog{messages: messages, logger: logger}
 }