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package main
import (
"fmt"
"os"
"bufio"
"regexp"
"strings"
"strconv"
)
type Config struct {
server_name string
bind_addr string
bind_port string
paste_dir string
templ_dir string
log_fname string
max_size uint16
}
func (c Config) String() string {
var s string
s+= "Server name: " + c.server_name + "\n"
s+= "Listening on: " + c.bind_addr + ":" + c.bind_port +"\n"
s+= "paste_dir: " + c.paste_dir + "\n"
s+= "templ_dir: " + c.templ_dir + "\n"
s+= "log_fname: " + c.log_fname + "\n"
s+= "max_size: " + string(c.max_size) + "\n"
return s
}
func parse_config (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 += 1
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.server_name = strings.Trim(fields[1], " \t\"")
case "bind_addr":
c.bind_addr = strings.Trim(fields[1], " \t\"")
case "bind_port":
c.bind_port = strings.Trim(fields[1], " \t\"")
case "paste_dir":
c.paste_dir = strings.Trim(fields[1], " \t\"")
case "templ_dir":
c.templ_dir = strings.Trim(fields[1], " \t\"")
case "log_fname":
c.log_fname = strings.Trim(fields[1], " \t\"")
case "max_size":
if m_size, err := strconv.ParseUint(fields[1], 10, 16); err == nil {
c.max_size = uint16(m_size)
} 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
}
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