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gopher.go
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gopher.go
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/*
* Copyright © 2020 Musing Studio LLC.
*
* This file is part of WriteFreely.
*
* WriteFreely is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, included
* in the LICENSE file in this source code package.
*/
package writefreely
import (
"bytes"
"fmt"
"io"
"net/url"
"regexp"
"strings"
"github.com/writeas/web-core/log"
"github.com/writefreely/go-gopher"
)
func initGopher(apper Apper) {
handler := NewWFHandler(apper)
gopher.HandleFunc("/", handler.Gopher(handleGopher))
log.Info("Serving on gopher://localhost:%d", apper.App().Config().Server.GopherPort)
gopher.ListenAndServe(fmt.Sprintf(":%d", apper.App().Config().Server.GopherPort), nil)
}
// Utility function to strip the URL from the hostname provided by app.cfg.App.Host
func stripHostProtocol(app *App) string {
u, err := url.Parse(app.cfg.App.Host)
if err != nil {
// Fall back to host, with scheme stripped
return string(regexp.MustCompile("^.*://").ReplaceAll([]byte(app.cfg.App.Host), []byte("")))
}
return u.Hostname()
}
func handleGopher(app *App, w gopher.ResponseWriter, r *gopher.Request) error {
parts := strings.Split(r.Selector, "/")
if app.cfg.App.SingleUser {
if parts[1] != "" {
return handleGopherCollectionPost(app, w, r)
}
return handleGopherCollection(app, w, r)
}
// Show all public collections (a gopher Reader view, essentially)
if len(parts) == 3 {
return handleGopherCollection(app, w, r)
}
w.WriteInfo(fmt.Sprintf("Welcome to %s", app.cfg.App.SiteName))
colls, err := app.db.GetPublicCollections(app.cfg.App.Host)
if err != nil {
return err
}
for _, c := range *colls {
w.WriteItem(&gopher.Item{
Host: stripHostProtocol(app),
Port: app.cfg.Server.GopherPort,
Type: gopher.DIRECTORY,
Description: c.DisplayTitle(),
Selector: "/" + c.Alias + "/",
})
}
return w.End()
}
func handleGopherCollection(app *App, w gopher.ResponseWriter, r *gopher.Request) error {
var collAlias, slug string
var c *Collection
var err error
var baseSel = "/"
parts := strings.Split(r.Selector, "/")
if app.cfg.App.SingleUser {
// sanity check
slug = parts[1]
if slug != "" {
return handleGopherCollectionPost(app, w, r)
}
c, err = app.db.GetCollectionByID(1)
if err != nil {
return err
}
} else {
collAlias = parts[1]
slug = parts[2]
if slug != "" {
return handleGopherCollectionPost(app, w, r)
}
c, err = app.db.GetCollection(collAlias)
if err != nil {
return err
}
baseSel = "/" + c.Alias + "/"
}
c.hostName = app.cfg.App.Host
w.WriteInfo(c.DisplayTitle())
if c.Description != "" {
w.WriteInfo(c.Description)
}
posts, err := app.db.GetPosts(app.cfg, c, 0, false, false, false, "")
if err != nil {
return err
}
for _, p := range *posts {
w.WriteItem(&gopher.Item{
Port: app.cfg.Server.GopherPort,
Host: stripHostProtocol(app),
Type: gopher.FILE,
Description: p.CreatedDate() + " - " + p.DisplayTitle(),
Selector: baseSel + p.Slug.String,
})
}
return w.End()
}
func handleGopherCollectionPost(app *App, w gopher.ResponseWriter, r *gopher.Request) error {
var collAlias, slug string
var c *Collection
var err error
parts := strings.Split(r.Selector, "/")
if app.cfg.App.SingleUser {
slug = parts[1]
c, err = app.db.GetCollectionByID(1)
if err != nil {
return err
}
} else {
collAlias = parts[1]
slug = parts[2]
c, err = app.db.GetCollection(collAlias)
if err != nil {
return err
}
}
c.hostName = app.cfg.App.Host
p, err := app.db.GetPost(slug, c.ID)
if err != nil {
return err
}
b := bytes.Buffer{}
if p.Title.String != "" {
b.WriteString(p.Title.String + "\n")
}
b.WriteString(p.DisplayDate + "\n\n")
b.WriteString(p.Content)
io.Copy(w, &b)
return w.End()
}

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