page_handler.go

package main

import (
	"fmt"
	"github.com/gorilla/mux"
	"github.com/patrickmn/go-cache"
	"html/template"
	"io"
	"net/http"
	"path"
)

func (b *Bilbo) HandlePage(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)

	normalizedLink := normalizePageLink(vars["page"], false)
	if normalizedLink != vars["page"] {
		redirectUrl, err := b.mux.Get("pages#show").URL("page", normalizedLink)
		if err != nil {
			panic(err)
		}

		http.Redirect(w, r, redirectUrl.String(), http.StatusMovedPermanently)
	}

	page, commit, err := b.getRequestedPage(r)
	if err != nil {
		if err == io.EOF {
			redirectUrl, _ := b.mux.Get("pages#edit").URL("page", normalizePageLink(vars["page"], true))
			http.Redirect(w, r, redirectUrl.String(), http.StatusSeeOther)
		} else {
			panic(err)
		}
	}

	cacheKey := fmt.Sprintf("page-%s-%s", page.Filepath, commit)
	cachedPage, found := b.cache.Get(cacheKey)
	if found {
		page = cachedPage.(*Page)
	} else {
		err = b.RenderPage(page, commit)
		if err != nil {
			panic(err)
		}

		b.cache.Set(cacheKey, page, cache.DefaultExpiration)
	}

	pageFolder := path.Dir(page.Linkpath)
	if pageFolder == "/" {
		pageFolder = ""
	}

	b.renderTemplate(w, r, "page.html", hash{
		"content":    template.HTML(string(page.Rendered)),
		"isPage":     true,
		"lastCommit": page.LastCommit,
		"page":       page,
		"pageFolder": pageFolder,
		"pageLayout": "page",
		"pageTitle":  page.Title,
	})
}