Refactor routers directory (#15800)

* refactor routers directory

* move func used for web and api to common

* make corsHandler a function to prohibit side efects

* rm unused func

Co-authored-by: 6543 <6543@obermui.de>

routers/web/user/avatar.go

@@ -0,0 +1,98 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package user
+
+import (
+	"errors"
+	"net/url"
+	"path"
+	"strconv"
+	"strings"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+)
+
+// Avatar redirect browser to user avatar of requested size
+func Avatar(ctx *context.Context) {
+	userName := ctx.Params(":username")
+	size, err := strconv.Atoi(ctx.Params(":size"))
+	if err != nil {
+		ctx.ServerError("Invalid avatar size", err)
+		return
+	}
+
+	log.Debug("Asked avatar for user %v and size %v", userName, size)
+
+	var user *models.User
+	if strings.ToLower(userName) != "ghost" {
+		user, err = models.GetUserByName(userName)
+		if err != nil {
+			if models.IsErrUserNotExist(err) {
+				ctx.ServerError("Requested avatar for invalid user", err)
+			} else {
+				ctx.ServerError("Retrieving user by name", err)
+			}
+			return
+		}
+	} else {
+		user = models.NewGhostUser()
+	}
+
+	ctx.Redirect(user.RealSizedAvatarLink(size))
+}
+
+// AvatarByEmailHash redirects the browser to the appropriate Avatar link
+func AvatarByEmailHash(ctx *context.Context) {
+	var err error
+
+	hash := ctx.Params(":hash")
+	if len(hash) == 0 {
+		ctx.ServerError("invalid avatar hash", errors.New("hash cannot be empty"))
+		return
+	}
+
+	var email string
+	email, err = models.GetEmailForHash(hash)
+	if err != nil {
+		ctx.ServerError("invalid avatar hash", err)
+		return
+	}
+	if len(email) == 0 {
+		ctx.Redirect(models.DefaultAvatarLink())
+		return
+	}
+	size := ctx.QueryInt("size")
+	if size == 0 {
+		size = models.DefaultAvatarSize
+	}
+
+	var avatarURL *url.URL
+
+	if setting.EnableFederatedAvatar && setting.LibravatarService != nil {
+		avatarURL, err = models.LibravatarURL(email)
+		if err != nil {
+			avatarURL, err = url.Parse(models.DefaultAvatarLink())
+			if err != nil {
+				ctx.ServerError("invalid default avatar url", err)
+				return
+			}
+		}
+	} else if !setting.DisableGravatar {
+		copyOfGravatarSourceURL := *setting.GravatarSourceURL
+		avatarURL = &copyOfGravatarSourceURL
+		avatarURL.Path = path.Join(avatarURL.Path, hash)
+	} else {
+		avatarURL, err = url.Parse(models.DefaultAvatarLink())
+		if err != nil {
+			ctx.ServerError("invalid default avatar url", err)
+			return
+		}
+	}
+
+	ctx.Redirect(models.MakeFinalAvatarURL(avatarURL, size))
+}