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parsers.go
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parsers.go
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package haproxyconfigparser
// based on http://www.haproxy.org/download/1.4/doc/configuration.txt
import (
"fmt"
"strconv"
)
type Parser interface {
Parse(node string, options []string, enable bool) error
Install(s *Services)
Name() string
}
/*
The following keywords are supported in the "global" section :
* Process management and security
- chroot
- daemon
- gid
- group
- log
- log-send-hostname
- nbproc
- pidfile
- uid
- ulimit-n
- user
- stats
- node
- description
* Performance tuning
- maxconn
- maxpipes
- noepoll
- nokqueue
- nopoll
- nosepoll
- nosplice
- spread-checks
- tune.bufsize
- tune.chksize
- tune.maxaccept
- tune.maxpollevents
- tune.maxrewrite
- tune.rcvbuf.client
- tune.rcvbuf.server
- tune.sndbuf.client
- tune.sndbuf.server
* Debugging
- debug
- quiet
*/
type GlobalParser struct {
Global Global
}
func (self *GlobalParser) Name() string {
return "global"
}
func (self *GlobalParser) Parse(node string, options []string, enable bool) error {
if !enable {
return nil
}
switch node {
case "stats":
size := len(options)
for i, v := range options {
if v == "socket" {
if size > i+1 {
addr, typ := ParseSockAddr(options[i+1])
self.Global.Stats = append(self.Global.Stats, &Socket{
Type: typ,
Addr: addr,
})
} else {
return fmt.Errorf("Can not get socket path from options.")
}
}
}
case "daemon":
self.Global.Daemon = true
case "user":
self.Global.User = options[0]
case "group":
self.Global.Group = options[0]
case "maxconn":
maxconn, err := strconv.Atoi(options[0])
if err != nil {
return err
}
self.Global.Maxconn = maxconn
}
return nil
}
func (self *GlobalParser) Install(s *Services) {
s.Global = self.Global
}
func NewGlobalParser() *GlobalParser {
return &GlobalParser{}
}
type FrontendParser struct {
Frontend Frontend
}
func (self *FrontendParser) Name() string {
return "frontend"
}
func (self *FrontendParser) Parse(node string, options []string, enable bool) error {
if !enable {
return nil
}
// TODO support default_backend
switch node {
case "bind": // TODO '0.0.0.0:443 ssl crt /path/to/server.pem' style
host, port, err := SeparateHostAndPort(options[0])
if err != nil {
return err
}
self.Frontend.Bind.Host = host
self.Frontend.Bind.Port = port
case "mode":
self.Frontend.Mode = options[0]
case "maxconn":
maxconn, err := strconv.Atoi(options[0])
if err != nil {
return err
}
self.Frontend.Maxconn = maxconn
case "acl":
acl := &Acl{
Name: options[0],
Type: options[1],
Condition: options[2:],
}
self.Frontend.Acls = append(self.Frontend.Acls, acl)
case "use_backend":
if len(options) < 3 {
return fmt.Errorf("[ACL] No conditions are defined in use_backend '%s'", options)
}
bq, err := CreateUseBackendClauses(options[1], options[2:])
if err != nil {
return err
}
self.Frontend.UseBackends = append(self.Frontend.UseBackends, &UseBackend{
Name: options[0],
Condition: bq,
})
case "default_backend":
if len(options)>=1{
self.Frontend.DefaultBackend = options[0]
}
}
return nil
}
func (self *FrontendParser) Install(s *Services) {
s.Frontends = append(s.Frontends, self.Frontend)
}
func NewFrontendParser(name string) *FrontendParser {
return &FrontendParser{
Frontend: Frontend{
Name: name,
},
}
}
type NilParser struct { // this parser does nothig
Section string
}
func NewNilParser(section string) *NilParser {
return &NilParser{section}
}
func (self *NilParser) Name() string {
return self.Section
}
func (self *NilParser) Parse(node string, options []string, enable bool) error {
return nil
}
func (self *NilParser) Install(s *Services) {}
type BackendParser struct {
Backend Backend
}
func (self *BackendParser) Name() string {
return "backend"
}
func (self *BackendParser) Parse(node string, options []string, enable bool) error {
switch node {
case "option":
if enable {
self.Backend.Options = append(self.Backend.Options, options)
}
case "server":
host, port, err := SeparateHostAndPort(options[1])
if err != nil {
return err
}
s := &Server{
Label: options[0],
Host: host,
Port: port,
Enabled: enable,
}
if len(options) >= 3 {
s.Options = options[2:]
}
self.Backend.Servers = append(self.Backend.Servers, s)
case "mode":
if enable {
self.Backend.Mode = options[0]
}
case "balance":
if enable {
self.Backend.Balance = options[0]
}
case "http-request":
if enable {
self.Backend.HttpRequest = options
}
}
return nil
}
func (self *BackendParser) Install(s *Services) {
s.Backends = append(s.Backends, self.Backend)
}
func NewBackendParser(name string) *BackendParser {
return &BackendParser{
Backend: Backend{
Name: name,
},
}
}