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|
package server
import (
"crypto/subtle"
"fmt"
"net/http"
"net/url"
"strings"
"github.com/LMBishop/scrapbook/pkg/config"
"github.com/LMBishop/scrapbook/pkg/html"
"github.com/LMBishop/scrapbook/pkg/index"
"github.com/LMBishop/scrapbook/pkg/site"
)
func ServeSite(siteIndex *index.SiteIndex) func(w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
site := siteIndex.GetSiteByHost(r.Host)
if site == nil {
w.WriteHeader(http.StatusNotFound)
html.NotFoundSitePage(r.Host).Render(w)
return
}
if site.SiteConfig.Flags&config.FlagDisable != 0 {
w.WriteHeader(http.StatusForbidden)
html.ForbiddenDisabledPage(site.SiteConfig.Host).Render(w)
return
}
if site.SiteConfig.Flags&config.FlagPassword != 0 {
jwt, err := r.Cookie("session")
if err != nil {
goto deny
}
err = site.Authenticator.VerifyJwt(jwt.Value)
if err != nil {
goto deny
}
goto permit
deny:
if strings.HasPrefix(r.URL.Path, "/authenticate") {
goto ask
}
http.Redirect(w, r, "/authenticate?redirect="+url.QueryEscape(r.URL.Path), 302)
return
ask:
handleAsk(w, r, site)
return
permit:
}
site.Handler.ServeHTTP(w, r)
}
}
func handleAsk(w http.ResponseWriter, r *http.Request, site *site.Site) {
redirect := r.URL.Query().Get("redirect")
switch r.Method {
case "GET":
html.AuthenticateSitePage("", redirect, site.Name).Render(w)
case "POST":
err := r.ParseForm()
if err != nil {
html.AuthenticateSitePage(err.Error(), redirect, site.Name).Render(w)
return
}
password := r.Form.Get("password")
if len(site.SiteConfig.Password) == 0 || subtle.ConstantTimeCompare([]byte(password), []byte(site.SiteConfig.Password)) != 1 {
html.AuthenticateSitePage("The password is incorrect", redirect, site.Name).Render(w)
return
}
jwt, err := site.Authenticator.NewJwt()
if err != nil {
html.AuthenticateSitePage(fmt.Errorf("Failed to create jwt: %w", err).Error(), redirect, site.Name).Render(w)
return
}
http.SetCookie(w, &http.Cookie{
Name: "session",
Value: jwt,
Secure: true,
SameSite: http.SameSiteStrictMode,
HttpOnly: true,
})
http.Redirect(w, r, redirect, 302)
default:
w.WriteHeader(http.StatusMethodNotAllowed)
}
}
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