73 lines
1.4 KiB
Go
73 lines
1.4 KiB
Go
package render
|
|
|
|
import (
|
|
"bytes"
|
|
"html/template"
|
|
"log"
|
|
"net/http"
|
|
"path/filepath"
|
|
)
|
|
|
|
// RenderTemplate renders a HTML template file
|
|
func RenderTemplate(w http.ResponseWriter, tmpl string) {
|
|
// create a template cache
|
|
tc, err := createTemplateCache()
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
// get requested template from cache
|
|
t, ok := tc[tmpl]
|
|
if !ok {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Write to a buffer to make sure that the template can be read and
|
|
// written successfully
|
|
buf := new(bytes.Buffer)
|
|
err = t.Execute(buf, nil)
|
|
if err != nil {
|
|
log.Println(err)
|
|
}
|
|
|
|
// render the template
|
|
_, err = buf.WriteTo(w)
|
|
if err != nil {
|
|
log.Println(err)
|
|
}
|
|
}
|
|
|
|
func createTemplateCache() (map[string]*template.Template, error) {
|
|
myCache := map[string]*template.Template{}
|
|
|
|
// get all of the files named *.page.tmpl from ./templates
|
|
pages, err := filepath.Glob("./templates/*.page.tmpl")
|
|
if err != nil {
|
|
return myCache, err
|
|
}
|
|
|
|
// range through all files ending with *page.tmpl
|
|
for _, page := range pages {
|
|
name := filepath.Base(page)
|
|
ts, err := template.New(name).ParseFiles(page)
|
|
if err != nil {
|
|
return myCache, err
|
|
}
|
|
|
|
matches, err := filepath.Glob("./templates/*.layout.tmpl")
|
|
if err != nil {
|
|
return myCache, err
|
|
}
|
|
|
|
if len(matches) > 0 {
|
|
ts, err = ts.ParseGlob("./templates/*.layout.tmpl")
|
|
if err != nil {
|
|
return myCache, err
|
|
}
|
|
}
|
|
|
|
myCache[name] = ts
|
|
}
|
|
|
|
return myCache, nil
|
|
}
|