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config.go
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config.go
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/*
* 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 (
"bufio"
"fmt"
"os"
"regexp"
"strconv"
"strings"
)
type options struct {
confFile string
}
type config struct {
serverName string
bindAddr string
bindPort string
pasteDir string
templDir string
staticDir string
maxSize uint16
logFile string
storage string
}
func (c config) String() string {
var s string
s += "Server name: " + c.serverName + "\n"
s += "Listening on: " + c.bindAddr + ":" + c.bindPort + "\n"
s += "paste_dir: " + c.pasteDir + "\n"
s += "templ_dir: " + c.templDir + "\n"
s += "static_dir: " + c.staticDir + "\n"
s += "storage: " + c.storage + "\n"
s += "max_size: " + string(c.maxSize) + "\n"
s += "log_file: " + c.logFile + "\n"
return s
}
func parseConfig(fname string, c *config) error {
f, err := os.Open(fname)
if err != nil {
return err
}
r := bufio.NewScanner(f)
line := 0
for r.Scan() {
s := r.Text()
line++
if matched, _ := regexp.MatchString("^([ \t]*)$", s); matched != true {
// it's not a blank line
if matched, _ := regexp.MatchString("^#", s); matched != true {
// This is not a comment...
if matched, _ := regexp.MatchString("^([a-z_ ]+)=.*", s); matched == true {
// and contains an assignment
fields := strings.Split(s, "=")
switch strings.Trim(fields[0], " \t\"") {
case "server_name":
c.serverName = strings.Trim(fields[1], " \t\"")
case "bind_addr":
c.bindAddr = strings.Trim(fields[1], " \t\"")
case "bind_port":
c.bindPort = strings.Trim(fields[1], " \t\"")
case "paste_dir":
c.pasteDir = strings.Trim(fields[1], " \t\"")
case "templ_dir":
c.templDir = strings.Trim(fields[1], " \t\"")
case "static_dir":
c.staticDir = strings.Trim(fields[1], " \t\"")
case "storage":
c.storage = strings.Trim(fields[1], " \t\"")
case "log_file":
c.logFile = strings.Trim(fields[1], " \t\"")
case "max_size":
if mSize, err := strconv.ParseUint(fields[1], 10, 16); err == nil {
c.maxSize = uint16(mSize)
} else {
fmt.Fprintf(os.Stderr, "Invalid max_size value %s at line %d (max: 65535)\n",
fields[1], line)
}
default:
fmt.Fprintf(os.Stderr, "Error reading config file %s at line %d: unknown variable '%s'\n",
fname, line, fields[0])
}
} else {
fmt.Fprintf(os.Stderr, "Error reading config file %s at line %d: unknown statement '%s'\n",
fname, line, s)
}
}
}
}
return nil
}