106 lines
2.9 KiB
Go
106 lines
2.9 KiB
Go
package routes
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import (
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"bakonpancakz/homepage/env"
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"bakonpancakz/homepage/include"
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"bytes"
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"compress/gzip"
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"fmt"
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"log"
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"net/http"
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"strings"
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"sync"
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"text/template"
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)
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var articleCache sync.Map
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func PrepareBlogArticles(notFoundHandler HttpHandler) HttpHandler {
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return func(w http.ResponseWriter, r *http.Request) {
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for _, art := range env.Database.Articles {
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if strings.Compare(art.Slug, r.PathValue("slug")) == 0 {
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compress := strings.Contains(r.Header.Get("Accept-Encoding"), "gzip")
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cacheKeyStandard := fmt.Sprintf("art_%s_%t", art.Slug, true)
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cacheKeyCompress := fmt.Sprintf("art_%s_%t", art.Slug, false)
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// Check Browser Cache
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if r.Header.Get("If-None-Match") == env.VERSION {
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w.WriteHeader(http.StatusNotModified)
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return
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}
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// Check Template Cache
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w.Header().Set("ETag", env.VERSION)
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w.Header().Set("Content-Type", "text/html")
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w.Header().Set("Cache-Control", "public, max-age=3600, must-revalidate")
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if compress {
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if v, ok := articleCache.Load(cacheKeyCompress); ok {
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w.Header().Set("Content-Encoding", "gzip")
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w.Write(v.([]byte))
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return
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}
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} else {
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if v, ok := articleCache.Load(cacheKeyStandard); ok {
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w.Write(v.([]byte))
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return
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}
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}
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// Render Document
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tmpl, err := template.ParseFS(
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include.Templates,
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include.PreparePath(include.Templates, "base.html"),
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include.PreparePath(include.Templates, "blog_article.html"),
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include.PreparePath(include.Templates, fmt.Sprint("articles/", art.BaseTemplate)),
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include.PreparePath(include.Templates, "icons/logo_facebook.svg"),
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include.PreparePath(include.Templates, "icons/logo_linkedin.svg"),
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include.PreparePath(include.Templates, "icons/logo_x.svg"),
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include.PreparePath(include.Templates, "icons/icon_top.svg"),
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include.PreparePath(include.Templates, "icons/icon_home.svg"),
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include.PreparePath(include.Templates, "icons/icon_share.svg"),
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include.PreparePath(include.Templates, "icons/icon_stack.svg"),
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)
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if err != nil {
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log.Println("[routes/blog] Template Error:", err)
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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var b bytes.Buffer
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if err = tmpl.ExecuteTemplate(&b, "base.html", map[string]any{
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"Title": art.Title,
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"Version": env.VERSION,
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"Site": env.Database.Site,
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"Article": art,
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}); err != nil {
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log.Println("[routes/blog] Template Error:", err)
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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// Compress Document
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var c bytes.Buffer
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g := gzip.NewWriter(&c)
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g.Write(b.Bytes())
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g.Close()
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if include.Embedded {
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articleCache.Store(cacheKeyStandard, b.Bytes())
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articleCache.Store(cacheKeyCompress, c.Bytes())
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}
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// Send Document
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if compress {
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w.Header().Set("Content-Encoding", "gzip")
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w.Write(c.Bytes())
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} else {
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w.Write(b.Bytes())
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}
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return
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}
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}
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notFoundHandler(w, r)
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}
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}
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