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// Should be compiled to binary to be used as CGI script
package main
import (
"fmt"
"html"
"io/fs"
"net/url"
"os"
"path/filepath"
"regexp"
"strings"
)
func extractTitle(content string) string {
titleRegex := regexp.MustCompile(`(?i)<title>(.*?)</title>`)
matches := titleRegex.FindStringSubmatch(content)
if len(matches) > 1 {
return matches[1]
}
return "Без названия"
}
func main() {
// CGI header
fmt.Println("Content-Type: text/html; charset=utf-8")
fmt.Println()
// Получаем query string из окружения
rawQuery := os.Getenv("QUERY_STRING")
values, _ := url.ParseQuery(rawQuery)
tag := values.Get("tag")
if tag == "" {
fmt.Println("<p>Error: no tag specified</p>")
return
}
postsDir := "../posts"
tagRegex := regexp.MustCompile(`data-tag="` + regexp.QuoteMeta(tag) + `"`)
type Post struct {
Path string
Title string
}
var matches []Post
filepath.WalkDir(postsDir, func(path string, d fs.DirEntry, err error) error {
if err != nil {
return nil
}
if !d.IsDir() {
contentBytes, err := os.ReadFile(path)
if err == nil && tagRegex.Match(contentBytes) {
content := string(contentBytes)
title := extractTitle(content)
relPath := "/posts/" + filepath.Base(path)
matches = append(matches, Post{Path: relPath, Title: title})
}
}
return nil
})
// Составляем <ul>
var b strings.Builder
b.WriteString("<ul>\n")
for _, post := range matches {
fmt.Fprintf(&b, "<li><a class=\"text-sm underline\" href=\"%s\">%s</a></li>\n",
html.EscapeString(post.Path),
html.EscapeString(post.Title))
}
b.WriteString("</ul>")
// Читаем шаблон
templateBytes, err := os.ReadFile("../templates/tags.html")
if err != nil {
fmt.Println("<p>Error: template not found</p>")
return
}
template := string(templateBytes)
// Заменяем маркеры
output := strings.Replace(template, "<!-- %cgi.list% -->", b.String(), 1)
output = strings.Replace(output, "<!-- %cgi.tag% -->", html.EscapeString(tag), 1)
// Отдаём результат
fmt.Print(output)
}
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