/*
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*
* (c) Vincenzo "KatolaZ" Nicosia 2017 -- <katolaz@freaknet.org>
*
*
* This file is part of "binnit", a minimal no-fuss pastebin-like
* server written in golang
*
*/
package main
import (
"binnit/paste"
"flag"
"fmt"
"html"
"io"
"log"
"net/http"
"os"
"path/filepath"
"time"
)
var conf_file = flag.String("c", "./binnit.cfg", "Configuration file for binnit")
var p_conf = Config{
server_name: "localhost",
bind_addr: "0.0.0.0",
bind_port: "8000",
paste_dir: "./pastes",
templ_dir: "./tmpl",
max_size: 4096,
log_file: "./binnit.log",
}
func min(a, b int) int {
if a > b {
return b
} else {
return a
}
}
func handle_get_paste(w http.ResponseWriter, r *http.Request) {
var paste_name, orig_name string
orig_name = filepath.Clean(r.URL.Path)
paste_name = p_conf.paste_dir + "/" + orig_name
orig_IP := r.RemoteAddr
log.Printf("Received GET from %s for '%s'\n", orig_IP, orig_name)
// The default is to serve index.html
if (orig_name == "/") || (orig_name == "/index.html") {
http.ServeFile(w, r, p_conf.templ_dir+"/index.html")
} else {
// otherwise, if the requested paste exists, we serve it...
title, date, content, err := paste.Retrieve(paste_name)
title = html.EscapeString(title)
date = html.EscapeString(date)
content = html.EscapeString(content)
if err == nil {
s, err := prepare_paste_page(title, date, content, p_conf.templ_dir)
if err == nil {
fmt.Fprintf(w, "%s", s)
return
} else {
fmt.Fprintf(w, "Error recovering paste '%s'\n", orig_name)
return
}
} else {
// otherwise, we give say we didn't find it
fmt.Fprintf(w, "%s\n", err)
return
}
}
}
func handle_put_paste(w http.ResponseWriter, r *http.Request) {
err1 := r.ParseForm()
err2 := r.ParseMultipartForm(int64(2 * p_conf.max_size))
if err1 != nil && err2 != nil {
// Invalid POST -- let's serve the default file
http.ServeFile(w, r, p_conf.templ_dir+"/index.html")
} else {
req_body := r.PostForm
orig_IP := r.RemoteAddr
log.Printf("Received new POST from %s\n", orig_IP)
// get title, body, and time
title := req_body.Get("title")
date := time.Now().String()
content := req_body.Get("paste")
content = content[0:min(len(content), int(p_conf.max_size))]
ID, err := paste.Store(title, date, content, p_conf.paste_dir)
log.Printf(" title: %s\npaste: %s\n", title, content)
log.Printf(" ID: %s; err: %s\n", ID, err)
if err == nil {
hostname := p_conf.server_name
if show := req_body.Get("show"); show != "1" {
fmt.Fprintf(w, "http://%s/%s\n", hostname, ID)
return
} else {
fmt.Fprintf(w, "<html><body>Link: <a href='http://%s/%s'>http://%s/%s</a></body></html>",
hostname, ID, hostname, ID)
return
}
} else {
fmt.Fprintf(w, "%s\n", err)
}
}
}
func req_handler(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case "GET":
handle_get_paste(w, r)
case "POST":
handle_put_paste(w, r)
default:
http.NotFound(w, r)
}
}
func main() {
flag.Parse()
parse_config(*conf_file, &p_conf)
f, err := os.OpenFile(p_conf.log_file, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0600)
if err != nil {
fmt.Fprintf(os.Stderr, "Error opening log_file: %s. Exiting\n", p_conf.log_file)
os.Exit(1)
}
defer f.Close()
log.SetOutput(io.Writer(f))
log.SetPrefix("[binnit]: ")
log.SetFlags(log.Ldate | log.Ltime | log.Lmicroseconds)
log.Println("Binnit version 0.1 -- Starting ")
log.Printf(" + Config file: %s\n", *conf_file)
log.Printf(" + Serving pastes on: %s\n", p_conf.server_name)
log.Printf(" + listening on: %s:%s\n", p_conf.bind_addr, p_conf.bind_port)
log.Printf(" + paste_dir: %s\n", p_conf.paste_dir)
log.Printf(" + templ_dir: %s\n", p_conf.templ_dir)
log.Printf(" + max_size: %d\n", p_conf.max_size)
// FIXME: create paste_dir if it does not exist
http.HandleFunc("/", req_handler)
log.Fatal(http.ListenAndServe(p_conf.bind_addr+":"+p_conf.bind_port, nil))
}