v0.13.0 (#25)v0.13.0

- [feat: enable etag
middleware](https://github.com/SayaAndy/saya-today-web/commit/c7742b341a46360d16dd9035c046f004d0fe760c)
- feat: enable compress middleware
- feat: trim end slash of each request url (except for root)
- [feat: add linked
data](https://github.com/SayaAndy/saya-today-web/commit/a8f566cbeb8358aca7fb4532d8b69c513ef197f3)
- [feat: build
sitemap.xml](https://github.com/SayaAndy/saya-today-web/commit/7a40c01dd14f04787f5052d0c89e0d6fb9ce597f)
- [feat: generate
robots.txt](https://github.com/SayaAndy/saya-today-web/commit/be906e1cc4ec3e92bcb14ee08256b53f3a4b44e2)
- [feat: specify canonical hrefs for each
page](https://github.com/SayaAndy/saya-today-web/commit/a0ace41ad3b0f4661e98d8fa8ef254369cc80d1e)
- [feat: use semantic html tags for
pages](https://github.com/SayaAndy/saya-today-web/commit/2bcf8ee39555ea98be309b85547c797b0d172b84)
- feat: specify more meta properties for search engines
- fix: correct user and catalogue meta
- format: specify og property names in property field
- feat: user profile description

24 files changed, 422 insertions, 76 deletions

diff --git a/config/config.go b/config/config.go
index 1393dd8..fd8c480 100644
--- a/config/config.go
+++ b/config/config.go
@@ -16,6 +16,7 @@ type Config struct {
 	AvailableLanguages []AvailableLanguageConfig `json:"AvailableLanguages" yaml:"availableLanguages" validate:"required"`
 	Auth               AuthConfig                `json:"Auth" yaml:"auth" validate:"required"`
 	Mail               MailConfig                `json:"Mail" yaml:"mail" validate:"required"`
+	CanonicalEndpoint  string                    `json:"CanonicalEndpoint" yaml:"canonicalEndpoint" validate:"required"`
 }
 
 type BlogPagesConfig struct {
diff --git a/config/config.local.yaml b/config/config.local.yaml
index e23c808..c02dc2d 100644
--- a/config/config.local.yaml
+++ b/config/config.local.yaml
@@ -45,3 +45,4 @@ mail:
   salt: '${MAIL_SALT}'
   trigger:
     onNewPost: "* * * * *"
+canonicalEndpoint: 'http://127.0.0.1:3000'
diff --git a/config/config.prod.yaml b/config/config.prod.yaml
index 0bee79d..4de853c 100644
--- a/config/config.prod.yaml
+++ b/config/config.prod.yaml
@@ -44,3 +44,4 @@ mail:
   salt: '${MAIL_SALT}'
   trigger:
     onNewPost: "0/5 * * * *"
+canonicalEndpoint: 'https://${FQDN}'
diff --git a/config/config.stage.yaml b/config/config.stage.yaml
index 1c15dae..efa94ae 100644
--- a/config/config.stage.yaml
+++ b/config/config.stage.yaml
@@ -44,3 +44,4 @@ mail:
   salt: '${MAIL_SALT}'
   trigger:
     onNewPost: "0/3 * * * *"
+canonicalEndpoint: 'https://${FQDN}'
diff --git a/internal/b2/client.go b/internal/b2/client.go
index d712736..fda79e0 100644
--- a/internal/b2/client.go
+++ b/internal/b2/client.go
@@ -33,10 +33,11 @@ func NewB2Client(cfg *config.B2Config) (*B2Client, error) {
 }
 
 type BlogPage struct {
-	Link     string
-	FileName string
-	Lang     string
-	Metadata *frontmatter.Metadata
+	Link         string
+	FileName     string
+	Lang         string
+	ModifiedTime time.Time
+	Metadata     *frontmatter.Metadata
 }
 
 func (c *B2Client) Scan(prefix string) ([]*BlogPage, error) {
@@ -79,9 +80,13 @@ func (c *B2Client) Scan(prefix string) ([]*BlogPage, error) {
 		tags := strings.Split(attrs.Info["tags"], ",")
 		slices.Sort(tags)
 
+		lang, _ := strings.CutPrefix(linkParts[0], c.prefix)
+
 		filePaths = append(filePaths, &BlogPage{
-			Link:     obj.Name(),
-			FileName: fileName,
+			Link:         obj.Name(),
+			FileName:     fileName,
+			Lang:         lang,
+			ModifiedTime: attrs.LastModified,
 			Metadata: &frontmatter.Metadata{
 				Title:            attrs.Info["title"],
 				ShortDescription: attrs.Info["short-description"],
diff --git a/internal/router/basic-handler.go b/internal/router/basic-handler.go
index 4a94a48..b973d01 100644
--- a/internal/router/basic-handler.go
+++ b/internal/router/basic-handler.go
@@ -34,6 +34,14 @@ func (r *BasicHandler) TemplatesToInject() []string {
 	return []string{}
 }
 
+func (r *BasicHandler) SitemapInfo(supplements *Supplements) []SitemapInfo {
+	return nil
+}
+
+func (r *BasicHandler) ContentType() string {
+	return fiber.MIMETextHTMLCharsetUTF8
+}
+
 func (r *BasicHandler) Render(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (statusCode int, err error) {
 	if !r.IsTemplated() {
 		panic("handler did not implement Render method (while being non-templated)")
@@ -41,10 +49,12 @@ func (r *BasicHandler) Render(c *fiber.Ctx, supplements *Supplements, lang strin
 	return fiber.StatusNoContent, nil
 }
 
-func (r *BasicHandler) AddMeta(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (meta map[string]string, err error) {
-	return map[string]string{
-		"robots": "noindex,nofollow",
-	}, nil
+func (r *BasicHandler) AddMeta(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (meta []MetaField, err error) {
+	return []MetaField{{Name: "robots", Content: "noindex,nofollow"}}, nil
+}
+
+func (r *BasicHandler) AddLinkedData(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (ld map[string]any, err error) {
+	return nil, nil
 }
 
 func (r *BasicHandler) RenderHeader(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (statusCode int, err error) {
diff --git a/internal/router/handlers/lang-blog-title.go b/internal/router/handlers/lang-blog-title.go
index 97de089..5bfc6e7 100644
--- a/internal/router/handlers/lang-blog-title.go
+++ b/internal/router/handlers/lang-blog-title.go
@@ -46,17 +46,54 @@ func (r *BlogPageHandler) ToValidateLang() router.LangSetting {
 	return router.InPath
 }
 
-func (r *BlogPageHandler) AddMeta(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (meta map[string]string, err error) {
+func (r *BlogPageHandler) SitemapInfo(supplements *router.Supplements) []router.SitemapInfo {
+	sitemapInfo := []router.SitemapInfo{}
+
+	pages, err := supplements.B2Client.Scan("")
+	if err != nil {
+		return sitemapInfo
+	}
+
+	for _, page := range pages {
+		sitemapInfo = append(sitemapInfo, router.SitemapInfo{
+			Loc:          "/" + page.Lang + "/blog/" + page.FileName,
+			LastModified: page.ModifiedTime,
+			Priority:     1.0,
+		})
+	}
+
+	return sitemapInfo
+}
+
+func (r *BlogPageHandler) AddMeta(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (meta []router.MetaField, err error) {
+	metadata, _, err := supplements.B2Client.ReadFrontmatter(lang + "/" + c.Params("title") + ".md")
+	if err != nil {
+		return nil, fmt.Errorf("failed to read frontmatter of the desired blog post: %w", err)
+	}
+
+	return []router.MetaField{
+		{Property: "og:title", Content: metadata.Title},
+		{Property: "og:description", Content: fmt.Sprintf("%s [%s]", metadata.ShortDescription, metadata.ActionDate)},
+		{Property: "og:image", Content: fmt.Sprintf("https://f003.backblazeb2.com/file/sayana-photos/webp-320p/%s.webp", metadata.Thumbnail)},
+		{Property: "og:url", Content: fmt.Sprintf("%s/%s/blog/%s", templateMap["CanonicalEndpoint"], lang, c.Params("title"))},
+		{Property: "og:type", Content: "website"},
+		{Name: "twitter:card", Content: "summary_large_image"},
+	}, nil
+}
+
+func (r *BlogPageHandler) AddLinkedData(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (ld map[string]any, err error) {
 	metadata, _, err := supplements.B2Client.ReadFrontmatter(lang + "/" + c.Params("title") + ".md")
 	if err != nil {
 		return nil, fmt.Errorf("failed to read frontmatter of the desired blog post: %w", err)
 	}
 
-	return map[string]string{
-		"og:title":       metadata.Title,
-		"og:description": fmt.Sprintf("%s [%s]", metadata.ShortDescription, metadata.ActionDate),
-		"og:image":       fmt.Sprintf("https://f003.backblazeb2.com/file/sayana-photos/webp-320p/%s.webp", metadata.Thumbnail),
-		"twitter:card":   "summary_large_image",
+	return map[string]any{
+		"@context":      "https://schema.org",
+		"@type":         "Article",
+		"headline":      metadata.Title,
+		"description":   fmt.Sprintf("%s [%s]", metadata.ShortDescription, metadata.ActionDate),
+		"author":        map[string]string{"@type": "Person", "name": "Saya Andy"},
+		"datePublished": metadata.PublishedTime.UTC().Format(time.RFC3339),
 	}, nil
 }
 
diff --git a/internal/router/handlers/lang-blog.go b/internal/router/handlers/lang-blog.go
index e4c20c6..709d3dc 100644
--- a/internal/router/handlers/lang-blog.go
+++ b/internal/router/handlers/lang-blog.go
@@ -47,6 +47,23 @@ func (r *CatalogueHandler) ToValidateLang() router.LangSetting {
 	return router.InPath
 }
 
+func (r *CatalogueHandler) SitemapInfo(supplements *router.Supplements) []router.SitemapInfo {
+	sitemapInfo := []router.SitemapInfo{}
+	for _, lang := range supplements.AvailableLanguages {
+		sitemapInfo = append(sitemapInfo, router.SitemapInfo{Loc: "/" + lang.Name + "/blog", Priority: 0.3})
+	}
+	return sitemapInfo
+}
+
+func (r *CatalogueHandler) AddMeta(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (meta []router.MetaField, err error) {
+	return []router.MetaField{
+		{Property: "og:title", Content: supplements.Localization[lang].BlogSearch.Header},
+		{Property: "og:description", Content: supplements.Localization[lang].BlogSearch.Description},
+		{Property: "og:url", Content: fmt.Sprintf("%s/%s/blog", templateMap["CanonicalEndpoint"], lang)},
+		{Property: "og:type", Content: "website"},
+	}, nil
+}
+
 func (r *CatalogueHandler) RenderBody(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (statusCode int, err error) {
 	querySort := c.Query("sort")
 	if querySort == "" {
diff --git a/internal/router/handlers/lang-map.go b/internal/router/handlers/lang-map.go
index 7df6104..551b485 100644
--- a/internal/router/handlers/lang-map.go
+++ b/internal/router/handlers/lang-map.go
@@ -40,6 +40,14 @@ func (r *MapHandler) ToValidateLang() router.LangSetting {
 	return router.InPath
 }
 
+func (r *MapHandler) SitemapInfo(supplements *router.Supplements) []router.SitemapInfo {
+	sitemapInfo := []router.SitemapInfo{}
+	for _, lang := range supplements.AvailableLanguages {
+		sitemapInfo = append(sitemapInfo, router.SitemapInfo{Loc: "/" + lang.Name + "/map", Priority: 0.3})
+	}
+	return sitemapInfo
+}
+
 func (r *MapHandler) Render(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (statusCode int, err error) {
 	pages, err := supplements.B2Client.Scan(lang + "/")
 	slices.SortFunc(pages, func(a *b2.BlogPage, b *b2.BlogPage) int {
diff --git a/internal/router/handlers/lang-user.go b/internal/router/handlers/lang-user.go
index c22bcac..eae1685 100644
--- a/internal/router/handlers/lang-user.go
+++ b/internal/router/handlers/lang-user.go
@@ -37,10 +37,13 @@ func (r *UserHandler) ToValidateLang() router.LangSetting {
 	return router.InPath
 }
 
-func (r *UserHandler) AddMeta(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (meta map[string]string, err error) {
-	return map[string]string{
-		"og:title":       supplements.Localization[lang].BlogSearch.Header,
-		"og:description": supplements.Localization[lang].BlogSearch.Description,
+func (r *UserHandler) AddMeta(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (meta []router.MetaField, err error) {
+	return []router.MetaField{
+		{Name: "robots", Content: "noindex,nofollow"},
+		{Property: "og:title", Content: supplements.Localization[lang].UserProfile.Header},
+		{Property: "og:description", Content: supplements.Localization[lang].UserProfile.Description},
+		{Property: "og:url", Content: fmt.Sprintf("%s/%s/user", templateMap["CanonicalEndpoint"], lang)},
+		{Property: "og:type", Content: "website"},
 	}, nil
 }
 
diff --git a/internal/router/handlers/lang.go b/internal/router/handlers/lang.go
index 74166ae..c618353 100644
--- a/internal/router/handlers/lang.go
+++ b/internal/router/handlers/lang.go
@@ -41,11 +41,21 @@ func (r *HomeHandler) ToValidateLang() router.LangSetting {
 	return router.InPath
 }
 
-func (r *HomeHandler) AddMeta(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (meta map[string]string, err error) {
-	return map[string]string{
-		"og:title":       supplements.Localization[lang].HomePage.Header,
-		"og:description": supplements.Localization[lang].HomePage.HomePageDescription,
-		"og:image":       "https://f003.backblazeb2.com/file/sayana-static/home-page-gifs/" + fmt.Sprintf("otter-%d.gif", rand.Int()%3+1),
+func (r *HomeHandler) SitemapInfo(supplements *router.Supplements) []router.SitemapInfo {
+	sitemapInfo := []router.SitemapInfo{}
+	for _, lang := range supplements.AvailableLanguages {
+		sitemapInfo = append(sitemapInfo, router.SitemapInfo{Loc: "/" + lang.Name, Priority: 0.7})
+	}
+	return sitemapInfo
+}
+
+func (r *HomeHandler) AddMeta(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (meta []router.MetaField, err error) {
+	return []router.MetaField{
+		{Property: "og:title", Content: supplements.Localization[lang].HomePage.Header},
+		{Property: "og:description", Content: supplements.Localization[lang].HomePage.HomePageDescription},
+		{Property: "og:image", Content: fmt.Sprintf("https://f003.backblazeb2.com/file/sayana-static/home-page-gifs/otter-%d.gif", rand.Int()%3+1)},
+		{Property: "og:url", Content: fmt.Sprintf("%s/%s", templateMap["CanonicalEndpoint"], lang)},
+		{Property: "og:type", Content: "website"},
 	}, nil
 }
 
diff --git a/internal/router/handlers/robots.txt.go b/internal/router/handlers/robots.txt.go
new file mode 100644
index 0000000..fc60af4
--- /dev/null
+++ b/internal/router/handlers/robots.txt.go
@@ -0,0 +1,48 @@
+package handlers
+
+import (
+	"time"
+
+	"github.com/SayaAndy/saya-today-web/internal/router"
+	"github.com/gofiber/fiber/v2"
+)
+
+type RobotsTxtHandler struct {
+	router.BasicHandler
+}
+
+func init() {
+	router.Routes = append(router.Routes, &RobotsTxtHandler{})
+}
+
+func (r *RobotsTxtHandler) Filter() (method string, path string) {
+	return "GET", "/robots.txt"
+}
+
+func (r *RobotsTxtHandler) IsTemplated() bool {
+	return false
+}
+
+func (r *RobotsTxtHandler) TemplatesToInject() []string {
+	return []string{"views/pages/robots.txt"}
+}
+
+func (r *RobotsTxtHandler) ToCache() router.CacheSetting {
+	return router.ByUrlOnly
+}
+
+func (r *RobotsTxtHandler) CacheDuration() time.Duration {
+	return time.Hour
+}
+
+func (r *RobotsTxtHandler) ToValidateLang() router.LangSetting {
+	return router.NotRequired
+}
+
+func (r *RobotsTxtHandler) ContentType() string {
+	return fiber.MIMETextPlainCharsetUTF8
+}
+
+func (r *RobotsTxtHandler) Render(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (statusCode int, err error) {
+	return fiber.StatusOK, nil
+}
diff --git a/internal/router/handlers/root.go b/internal/router/handlers/root.go
index 9f15782..cd01fcd 100644
--- a/internal/router/handlers/root.go
+++ b/internal/router/handlers/root.go
@@ -1,6 +1,7 @@
 package handlers
 
 import (
+	"fmt"
 	"time"
 
 	"github.com/SayaAndy/saya-today-web/internal/router"
@@ -35,10 +36,16 @@ func (r *RootHandler) CacheDuration() time.Duration {
 	return 24 * time.Hour
 }
 
-func (r *RootHandler) AddMeta(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (meta map[string]string, err error) {
-	return map[string]string{
-		"og:title":       "Saya Blog",
-		"og:description": "The blog of a 25 years old, travelling God knows where, proud to be not mainstream // Личный блог 25-летки, странствующего по ебеням, зато не мейнстрим",
+func (r *RootHandler) SitemapInfo(_ *router.Supplements) []router.SitemapInfo {
+	return []router.SitemapInfo{{Loc: "/", Priority: 0.7}}
+}
+
+func (r *RootHandler) AddMeta(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (meta []router.MetaField, err error) {
+	return []router.MetaField{
+		{Property: "og:title", Content: "Saya Blog"},
+		{Property: "og:description", Content: "The blog of a 25 years old, travelling God knows where, proud to be not mainstream // Личный блог 25-летки, странствующего по ебеням, зато не мейнстрим"},
+		{Property: "og:url", Content: fmt.Sprint(templateMap["CanonicalEndpoint"]) + "/"},
+		{Property: "og:type", Content: "website"},
 	}, nil
 }
 
diff --git a/internal/router/handlers/sitemap.xml.go b/internal/router/handlers/sitemap.xml.go
new file mode 100644
index 0000000..bb1df93
--- /dev/null
+++ b/internal/router/handlers/sitemap.xml.go
@@ -0,0 +1,79 @@
+package handlers
+
+import (
+	"log/slog"
+	"time"
+
+	"github.com/SayaAndy/saya-today-web/internal/router"
+	"github.com/gofiber/fiber/v2"
+)
+
+type SitemapXmlHandler struct {
+	router.BasicHandler
+}
+
+func init() {
+	router.Routes = append(router.Routes, &SitemapXmlHandler{})
+}
+
+func (r *SitemapXmlHandler) Filter() (method string, path string) {
+	return "GET", "/sitemap.xml"
+}
+
+func (r *SitemapXmlHandler) IsTemplated() bool {
+	return false
+}
+
+func (r *SitemapXmlHandler) TemplatesToInject() []string {
+	return []string{"views/pages/sitemap.xml"}
+}
+
+func (r *SitemapXmlHandler) ToCache() router.CacheSetting {
+	return router.ByUrlOnly
+}
+
+func (r *SitemapXmlHandler) CacheDuration() time.Duration {
+	return time.Hour
+}
+
+func (r *SitemapXmlHandler) ToValidateLang() router.LangSetting {
+	return router.NotRequired
+}
+
+func (r *SitemapXmlHandler) ContentType() string {
+	return fiber.MIMEApplicationXMLCharsetUTF8
+}
+
+func (r *SitemapXmlHandler) Render(c *fiber.Ctx, supplements *router.Supplements, lang string, templateMap fiber.Map) (statusCode int, err error) {
+	urls := []router.SitemapInfo{}
+	for _, route := range router.Routes {
+		sitemapInfo := route.SitemapInfo(supplements)
+		if sitemapInfo == nil {
+			continue
+		}
+
+		method, match := route.Filter()
+		lastMod, err := supplements.TemplateManager.GetLastModified(method + " " + match)
+		if err != nil {
+			slog.Warn("failed to get last modified for a route",
+				slog.String("error", err.Error()),
+				slog.String("method", method),
+				slog.String("match", match))
+			lastMod = time.Now()
+		}
+
+		for i := range sitemapInfo {
+			if sitemapInfo[i].LastModified.Before(lastMod) {
+				sitemapInfo[i].LastModified = lastMod
+			}
+			if sitemapInfo[i].ChangeFreq == "" {
+				sitemapInfo[i].ChangeFreq = "monthly"
+			}
+			urls = append(urls, sitemapInfo[i])
+		}
+	}
+
+	templateMap["URLs"] = urls
+
+	return fiber.StatusOK, nil
+}
diff --git a/internal/router/router.go b/internal/router/router.go
index f28add2..0d0ce8c 100644
--- a/internal/router/router.go
+++ b/internal/router/router.go
@@ -2,8 +2,10 @@ package router
 
 import (
 	"database/sql"
+	"encoding/json"
 	"errors"
 	"fmt"
+	"html/template"
 	"log/slog"
 	"net/url"
 	"slices"
@@ -21,7 +23,9 @@ import (
 	"github.com/SayaAndy/saya-today-web/locale"
 	"github.com/dgraph-io/ristretto/v2"
 	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v2/middleware/compress"
 	"github.com/gofiber/fiber/v2/middleware/cors"
+	"github.com/gofiber/fiber/v2/middleware/etag"
 	"github.com/golang-migrate/migrate/v4"
 	"github.com/golang-migrate/migrate/v4/database/sqlite3"
 	"github.com/yuin/goldmark"
@@ -52,6 +56,19 @@ var (
 	Routes = make([]Route, 0)
 )
 
+type SitemapInfo struct {
+	Loc          string
+	LastModified time.Time
+	ChangeFreq   string
+	Priority     float32
+}
+
+type MetaField struct {
+	Name     string
+	Property string
+	Content  string
+}
+
 type Route interface {
 	Filter() (method string, path string)
 	IsTemplated() bool
@@ -59,8 +76,11 @@ type Route interface {
 	CacheDuration() time.Duration
 	ToValidateLang() LangSetting
 	TemplatesToInject() []string
+	SitemapInfo(supplements *Supplements) []SitemapInfo
+	ContentType() string
 	Render(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (statusCode int, err error)
-	AddMeta(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (meta map[string]string, err error)
+	AddMeta(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (meta []MetaField, err error)
+	AddLinkedData(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (ld map[string]any, err error)
 	RenderHeader(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (statusCode int, err error)
 	RenderBody(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (statusCode int, err error)
 	RenderFooter(c *fiber.Ctx, supplements *Supplements, lang string, templateMap fiber.Map) (statusCode int, err error)
@@ -87,6 +107,7 @@ type Router struct {
 	app                  *fiber.App
 	templatedRoutes      map[string]map[string]Route
 	templatedPathMatcher *PathMatcher
+	canonicalEndpoint    string
 }
 
 func NewRouter(cfg *config.Config) (*Router, error) {
@@ -210,10 +231,24 @@ func NewRouter(cfg *config.Config) (*Router, error) {
 		AllowHeaders: "Origin, Content-Type, Accept",
 	}))
 
+	app.Use(compress.New(compress.Config{
+		Level: compress.LevelBestSpeed,
+	}))
+
+	app.Use(etag.New())
+
+	app.Use(func(c *fiber.Ctx) error {
+		path := c.Path()
+		if len(path) > 1 && path[len(path)-1] == '/' {
+			return c.Redirect(strings.TrimRight(path, "/"), fiber.StatusMovedPermanently)
+		}
+		return c.Next()
+	})
+
 	templatedRoutes := make(map[string]map[string]Route)
 	templatedPathMatcher := NewPathMatcher()
 
-	return &Router{supplements, app, templatedRoutes, templatedPathMatcher}, nil
+	return &Router{supplements, app, templatedRoutes, templatedPathMatcher, cfg.CanonicalEndpoint}, nil
 }
 
 func (r *Router) InitRoutes() (err error) {
@@ -261,10 +296,11 @@ func (r *Router) InitRoutes() (err error) {
 				}
 
 				defaultMap := fiber.Map{
-					"L":           r.supplements.Localization[lang],
-					"Lang":        lang,
-					"Path":        trimmedPath,
-					"QueryString": queryString,
+					"L":                 r.supplements.Localization[lang],
+					"Lang":              lang,
+					"Path":              trimmedPath,
+					"QueryString":       queryString,
+					"CanonicalEndpoint": r.canonicalEndpoint,
 				}
 
 				statusCode, err := currentRoute.Render(c, r.supplements, lang, defaultMap)
@@ -303,8 +339,8 @@ func (r *Router) InitRoutes() (err error) {
 					go r.supplements.PageCache.SetWithTTL(cacheKey, content, int64(len(content)), route.CacheDuration())
 				}
 
-				c.Set(fiber.HeaderContentType, fiber.MIMETextHTMLCharsetUTF8)
-				return c.Status(statusCode).Type("html").Send(content)
+				c.Set(fiber.HeaderContentType, route.ContentType())
+				return c.Status(statusCode).Send(content)
 			})
 		}
 	}
@@ -327,7 +363,7 @@ func (r *Router) InitRoutes() (err error) {
 
 	r.app.Static("/", "./static")
 
-	Routes = make([]Route, 0)
+	// Routes = make([]Route, 0)
 
 	return nil
 }
@@ -379,14 +415,15 @@ func (r *Router) generalPage(c *fiber.Ctx, route Route, lang string) error {
 	}
 
 	if val, ok := r.supplements.PageCache.Get(cacheKey); val != nil && ok {
-		c.Set(fiber.HeaderContentType, fiber.MIMETextHTMLCharsetUTF8)
-		return c.Status(fiber.StatusOK).Type("html").Send(val)
+		c.Set(fiber.HeaderContentType, route.ContentType())
+		return c.Status(fiber.StatusOK).Send(val)
 	}
 
 	valueMap := fiber.Map{
-		"L":           r.supplements.Localization[lang],
-		"Lang":        lang,
-		"QueryString": queryString,
+		"L":                 r.supplements.Localization[lang],
+		"Lang":              lang,
+		"QueryString":       queryString,
+		"CanonicalEndpoint": r.canonicalEndpoint,
 	}
 
 	var err error
@@ -394,6 +431,15 @@ func (r *Router) generalPage(c *fiber.Ctx, route Route, lang string) error {
 		slog.Warn("failed to receive meta", slog.String("path", path), slog.String("error", err.Error()))
 	}
 
+	var ld map[string]any
+	if ld, err = route.AddLinkedData(c, r.supplements, lang, valueMap); err != nil {
+		slog.Warn("failed to receive linked data", slog.String("path", path), slog.String("error", err.Error()))
+	}
+	if ld != nil {
+		ldBytes, _ := json.Marshal(ld)
+		valueMap["LinkedData"] = template.JS(ldBytes)
+	}
+
 	content, err := r.supplements.TemplateManager.Render("general-page", valueMap)
 	if err != nil {
 		slog.Warn("failed to generate div", slog.String("path", path), slog.String("error", err.Error()))
@@ -401,8 +447,8 @@ func (r *Router) generalPage(c *fiber.Ctx, route Route, lang string) error {
 	}
 
 	go r.supplements.PageCache.SetWithTTL(cacheKey, content, int64(len(content)), route.CacheDuration())
-	c.Set(fiber.HeaderContentType, fiber.MIMETextHTMLCharsetUTF8)
-	return c.Status(fiber.StatusOK).Type("html").Send(content)
+	c.Set(fiber.HeaderContentType, route.ContentType())
+	return c.Status(fiber.StatusOK).Send(content)
 }
 
 func (r *Router) generalPageSegment(c *fiber.Ctx, part string) error {
@@ -447,17 +493,18 @@ func (r *Router) generalPageSegment(c *fiber.Ctx, part string) error {
 
 	if route.ToCache() != Disabled {
 		if val, ok := r.supplements.PageCache.Get(cacheKey); val != nil && ok {
-			c.Set(fiber.HeaderContentType, fiber.MIMETextHTMLCharsetUTF8)
-			return c.Status(fiber.StatusOK).Type("html").Send(val)
+			c.Set(fiber.HeaderContentType, route.ContentType())
+			return c.Status(fiber.StatusOK).Send(val)
 		}
 	}
 
 	var statusCode int
 	defaultMap := fiber.Map{
-		"L":           r.supplements.Localization[lang],
-		"Lang":        lang,
-		"Path":        strings.Trim(path, "/"),
-		"QueryString": queryString,
+		"L":                 r.supplements.Localization[lang],
+		"Lang":              lang,
+		"Path":              strings.Trim(path, "/"),
+		"QueryString":       queryString,
+		"CanonicalEndpoint": r.canonicalEndpoint,
 	}
 
 	switch part {
@@ -505,8 +552,8 @@ func (r *Router) generalPageSegment(c *fiber.Ctx, part string) error {
 		go r.supplements.PageCache.SetWithTTL(cacheKey, content, int64(len(content)), route.CacheDuration())
 	}
 
-	c.Set(fiber.HeaderContentType, fiber.MIMETextHTMLCharsetUTF8)
-	return c.Status(statusCode).Type("html").Send(content)
+	c.Set(fiber.HeaderContentType, route.ContentType())
+	return c.Status(statusCode).Send(content)
 }
 
 func (r *Router) getAndValidateLang(c *fiber.Ctx, langSetting LangSetting, defaultLang ...string) (string, error) {
diff --git a/internal/templatemanager/templatemanager.go b/internal/templatemanager/templatemanager.go
index b23e2e8..9d14e15 100644
--- a/internal/templatemanager/templatemanager.go
+++ b/internal/templatemanager/templatemanager.go
@@ -4,8 +4,10 @@ import (
 	"bytes"
 	"fmt"
 	"html/template"
+	"os"
 	"path/filepath"
 	"strings"
+	"time"
 )
 
 type TemplateManager struct {
@@ -13,8 +15,9 @@ type TemplateManager struct {
 }
 
 type templateManagerRender struct {
-	Main string
-	Tmpl *template.Template
+	Main         string
+	Tmpl         *template.Template
+	LastModified time.Time
 }
 
 type TemplateManagerTemplates struct {
@@ -53,10 +56,15 @@ func NewTemplateManager(templates ...TemplateManagerTemplates) (*TemplateManager
 		if err != nil {
 			return nil, err
 		}
+		modTime, err := setLastModified(tmplStruct.Files...)
+		if err != nil {
+			return nil, err
+		}
 
 		templateMap[tmplStruct.Name] = templateManagerRender{
-			Main: filepath.Base(tmplStruct.Files[0]),
-			Tmpl: tmpl,
+			Main:         filepath.Base(tmplStruct.Files[0]),
+			Tmpl:         tmpl,
+			LastModified: modTime,
 		}
 	}
 
@@ -114,10 +122,40 @@ func (tm *TemplateManager) Add(name string, files ...string) error {
 		return fmt.Errorf("failed to add template into manager: %w", err)
 	}
 
+	modTime, err := setLastModified(files...)
+	if err != nil {
+		return fmt.Errorf("failed to add template into manager: %w", err)
+	}
+
 	tm.templates[name] = templateManagerRender{
-		Main: filepath.Base(files[0]),
-		Tmpl: tmpl,
+		Main:         filepath.Base(files[0]),
+		Tmpl:         tmpl,
+		LastModified: modTime,
 	}
 
 	return nil
 }
+
+func (tm *TemplateManager) GetLastModified(name string) (time.Time, error) {
+	tmpl, exists := tm.templates[name]
+	if !exists {
+		return time.Time{}, fmt.Errorf("template %s not found", name)
+	}
+
+	return tmpl.LastModified, nil
+}
+
+func setLastModified(filenames ...string) (time.Time, error) {
+	lastModified := time.Time{}
+	for _, filename := range filenames {
+		stat, err := os.Stat(filename)
+		if err != nil {
+			return lastModified, fmt.Errorf("failed to stat file: path '%s': %w", filename, err)
+		}
+		modTime := stat.ModTime()
+		if lastModified.Before(modTime) {
+			lastModified = modTime
+		}
+	}
+	return lastModified, nil
+}
diff --git a/locale/localization.en.yaml b/locale/localization.en.yaml
index e165866..9923881 100644
--- a/locale/localization.en.yaml
+++ b/locale/localization.en.yaml
@@ -48,6 +48,7 @@ Mail:
     CapturedOn: 'Captured on'
 UserProfile:
   Header: 'Personal Settings'
+  Description: 'Set and verify your e-mail here, as well as subscribe to favorite blog tags'
   EmailHeader: 'E-Mail'
   VerificationCodeHeader: 'Verification Code'
   TypeEmail: 'Please type your email'
diff --git a/locale/localization.go b/locale/localization.go
index a4f36f1..7080355 100644
--- a/locale/localization.go
+++ b/locale/localization.go
@@ -85,6 +85,7 @@ type NewPostConfig struct {
 
 type UserProfileConfig struct {
 	Header                       string `yaml:"Header" json:"Header"`
+	Description                  string `yaml:"Description" json:"Description"`
 	EmailHeader                  string `yaml:"EmailHeader" json:"EmailHeader"`
 	VerificationCodeHeader       string `yaml:"VerificationCodeHeader" json:"VerificationCodeHeader"`
 	TypeEmail                    string `yaml:"TypeEmail" json:"TypeEmail"`
diff --git a/locale/localization.ru.yaml b/locale/localization.ru.yaml
index e65848a..34e5387 100644
--- a/locale/localization.ru.yaml
+++ b/locale/localization.ru.yaml
@@ -48,6 +48,7 @@ Mail:
     CapturedOn: 'Снималось'
 UserProfile:
   Header: 'Личные настройки'
+  Description: 'Здесь можно настроить и верифицировать свою электронную почту, а также подписаться на избранные темы блога'
   EmailHeader: 'E-Mail'
   VerificationCodeHeader: 'Код верификации'
   TypeEmail: 'Пожалуйста, введите свою почту'
diff --git a/views/layouts/general-page.html b/views/layouts/general-page.html
index 3f5bcfd..7167d12 100644
--- a/views/layouts/general-page.html
+++ b/views/layouts/general-page.html
@@ -3,13 +3,24 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    {{- range $k, $v := .Meta }}
-    <meta name="{{ $k }}" content="{{ $v }}">
+    {{- range .Meta }}
+    <meta {{with .Name}}name="{{.}}" {{end}}{{with .Property}}property="{{.}}" {{end}}{{with .Content}}content="{{.}}"{{end}}>
+    {{- if eq .Property "og:description" }}
+    <meta name="description" href="{{.Content}}">
+    {{- end }}
+    {{- if eq .Property "og:url" }}
+    <link rel="canonical" href="{{.Content}}">
+    {{- end }}
     {{- end }}
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.2/css/all.min.css">
     <link rel="stylesheet" href="https://f003.backblazeb2.com/file/sayana-static/libs/leaflet/1.9.4/leaflet.css">
     <link rel="stylesheet" href="https://f003.backblazeb2.com/file/sayana-static/libs/glightbox/3.3.0/css/glightbox.min.css">
     <link href="/output.css" rel="stylesheet">
+    {{- with .LinkedData }}
+    <script type="application/ld+json">
+    {{ . }}
+    </script>
+    {{- end }}
 </head>
 
 <body data-theme="ram" class="font-andika text-main-hard overflow-hidden bg-interlocked-hexagons h-dvh flex flex-row">
@@ -180,7 +191,7 @@
             flex-row sticky w-dvw h-fit xs:w-[90dvw]
             sm:left-0 sm:flex-col sm:fixed sm:w-fit
             z-20 shadow-[0_0_1rem_black]">
-            <div class="text-[3rem] flex flex-row sm:flex-col gap-0 relative z-20">
+            <nav aria-label="Main navigation" class="text-[3rem] flex flex-row sm:flex-col gap-0 relative z-20">
                 <a onclick="return changeUrl('/../', true);" href="./" id="sidebar-back-button" class="themed-button themed-button-sidebar w-fit h-fit hidden" draggable="false">
                     <i class="fas fa-circle-left flex w-18 h-18 content-center text-center text-sidebar"></i>
                 </a>
@@ -199,7 +210,7 @@
                 <a onclick="return changeUrl('/{{ .Lang }}/user');" href="/{{ .Lang }}/user" id="sidebar-user-button" class="themed-button themed-button-sidebar w-fit h-fit hidden" draggable="false">
                     <i class="fas fa-user flex w-18 h-18 content-center text-center text-sidebar"></i>
                 </a>
-            </div>
+            </nav>
             <div class="theme-wheel" id="theme-wheel">
                 <div class="theme-icon" data-theme="olive"></div>
                 <div class="theme-icon" data-theme="lettuce"></div>
@@ -247,21 +258,21 @@
             <div class="bg-background-dark border-r-2 border-dashed border-main-hard"></div>
 
             <div class="max-h-full max-w-full flex flex-col grow bg-background-dark relative pt-4 ml-8 pr-4">
-                <div id="general-page-header" class="max-xs:hidden [@media(max-height:32rem)]:hidden flex flex-col basis-8"
+                <header id="general-page-header" class="max-xs:hidden [@media(max-height:32rem)]:hidden flex flex-col basis-8"
                     hx-get="/api/v1/general-page/header{{ if .QueryString }}?{{ .QueryString }}{{ end }}" hx-trigger="load" hx-target="this" hx-swap="innerHTML">
-                </div>
+                </header>
                 <div id="general-page-header-trigger" hx-get="/api/v1/general-page/header{{ if .QueryString }}?{{ .QueryString }}{{ end }}" hx-trigger="popstate from:window" hx-target="#general-page-header" hx-swap="innerHTML"></div>
 
                 <hr class="max-xs:hidden [@media(max-height:32rem)]:hidden border-t-4 border-dotted border-main-hard mb-2">
 
-                <div id="general-page-body" class="relative flex flex-col grow overflow-y-auto"
+                <main id="general-page-body" class="relative flex flex-col grow overflow-y-auto"
                     hx-get="/api/v1/general-page/body{{ if .QueryString }}?{{ .QueryString }}{{ end }}" hx-trigger="load" hx-target="this" hx-swap="innerHTML">
-                </div>
+                </main>
                 <div id="general-page-body-trigger" hx-get="/api/v1/general-page/body{{ if .QueryString }}?{{ .QueryString }}{{ end }}" hx-trigger="popstate from:window" hx-target="#general-page-body" hx-swap="innerHTML"></div>
 
-                <div id="general-page-footer" class="flex flex-row basis-4 my-1"
+                <footer id="general-page-footer" class="flex flex-row basis-4 my-1"
                     hx-get="/api/v1/general-page/footer{{ if .QueryString }}?{{ .QueryString }}{{ end }}" hx-trigger="load" hx-target="this" hx-swap="innerHTML">
-                </div>
+                </footer>
                 <div id="general-page-footer-trigger" hx-get="/api/v1/general-page/footer{{ if .QueryString }}?{{ .QueryString }}{{ end }}" hx-trigger="popstate from:window" hx-target="#general-page-footer" hx-swap="innerHTML"></div>
 
                 <hr class="border-t-4 border-dotted border-main-hard mb-2">
diff --git a/views/pages/blog-page.html b/views/pages/blog-page.html
index c81406f..3fc4526 100644
--- a/views/pages/blog-page.html
+++ b/views/pages/blog-page.html
@@ -1,12 +1,12 @@
 {{ define "body" }}
 <div class="absolute w-full h-full inset-0 inset-shadow-[0_0_0.4rem_black] pointer-events-none z-20"></div>
-<div class="relative bg-background-light flex flex-col px-8 py-4 overflow-y-auto">
-    <p class="max-xs:block [@media(max-height:32rem)]:block hidden font-andika text-2xl font-bold italic text-main-hard tracking-[.0125rem] mb-1">{{ .Title }}</p>
+<article class="relative bg-background-light flex flex-col px-8 py-4 overflow-y-auto">
+    <h1 class="max-xs:block [@media(max-height:32rem)]:block hidden font-andika text-2xl font-bold italic text-main-hard tracking-[.0125rem] mb-1">{{ .Title }}</h1>
     <p class="block grow text-lg font-andika text-secondary">
         <b>{{ .L.Metadata.Published }}</b>: 
-        <span hx-get="/api/v1/tz" hx-vals='js:{timestamp: "{{ .PublishedDate }}", tz: clientTimeZone}' hx-target="this" hx-swap="innerHTML" hx-trigger="load">
+        <time datetime="{{ .PublishedDate }}" hx-get="/api/v1/tz" hx-vals='js:{timestamp: "{{ .PublishedDate }}", tz: clientTimeZone}' hx-target="this" hx-swap="innerHTML" hx-trigger="load">
             {{ .PublishedDate }}
-        </span>
+        </time>
     </p>
     <p class="block grow text-lg font-andika text-secondary"><b>{{ .L.Metadata.Action }}</b>: {{ .ActionDate }}</p>
     <p class="block grow text-md font-andika italic text-main-hard">{{ .ShortDescription }}</p>
@@ -60,7 +60,7 @@
         });
     </script>
 {{- end }}
-</div>
+</article>
 {{ end }}
 
 {{ define "header" }}
diff --git a/views/pages/global-map.html b/views/pages/global-map.html
index 4b07bd2..604b52e 100644
--- a/views/pages/global-map.html
+++ b/views/pages/global-map.html
@@ -3,9 +3,13 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <meta name="og:title" content="{{ .L.GlobalMap.Header }}">
-    <meta name="og:description" content="{{ .L.GlobalMap.Description }}">
+    <meta name="description" content="{{ .L.GlobalMap.Description }}">
+    <meta property="og:title" content="{{ .L.GlobalMap.Header }}">
+    <meta property="og:description" content="{{ .L.GlobalMap.Description }}">
+    <meta property="og:url" content="{{ .CanonicalEndpoint }}/{{ .Lang }}/map">
+    <meta property="og:type" content="site">
     <title>{{ .L.GlobalMap.Header }} // SAYA TODAY</title>
+    <link rel="canonical" href="{{ .CanonicalEndpoint }}/{{ .Lang }}/map">
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.2/css/all.min.css">
     {{ block "header" . }}{{ end }}
     <link href="/output.css" rel="stylesheet">
diff --git a/views/pages/robots.txt b/views/pages/robots.txt
new file mode 100644
index 0000000..1e5bebb
--- /dev/null
+++ b/views/pages/robots.txt
@@ -0,0 +1,5 @@
+User-agent: *
+Allow: /
+Disallow: /api/
+
+Sitemap: {{ .CanonicalEndpoint }}/sitemap.xml
\ No newline at end of file
diff --git a/views/pages/sitemap.xml b/views/pages/sitemap.xml
new file mode 100644
index 0000000..1474a56
--- /dev/null
+++ b/views/pages/sitemap.xml
@@ -0,0 +1,10 @@
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+    {{- range .URLs }}
+    <url>
+        <loc>{{ $.CanonicalEndpoint }}{{ .Loc }}</loc>
+        <lastmod>{{ .LastModified.UTC.Format "2006-01-02T15:04:05Z" }}</lastmod>
+        <changefreq>{{ .ChangeFreq }}</changefreq>
+        <priority>{{ printf "%.1f" .Priority }}</priority>
+    </url>
+    {{- end }}
+</urlset>