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upstream.go
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upstream.go
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package components
import (
"errors"
)
type Upstream struct {
UpstreamName string
UpstreamServers []*UpstreamServer
Directives []IDirective
Comment string
Line int
}
func (us *Upstream) GetName() string {
return "upstream"
}
func (us *Upstream) GetParameters() []string {
return []string{us.UpstreamName}
}
func (us *Upstream) GetBlock() IBlock {
return us
}
func (us *Upstream) GetComment() string {
return us.Comment
}
func (us *Upstream) GetDirectives() []IDirective {
directives := make([]IDirective, 0)
directives = append(directives, us.Directives...)
for _, uss := range us.UpstreamServers {
directives = append(directives, uss)
}
return directives
}
func NewUpstream(directive IDirective) (*Upstream, error) {
parameters := directive.GetParameters()
us := &Upstream{
UpstreamName: parameters[0],
Line: directive.GetLine(),
}
if block := directive.GetBlock(); block != nil {
us.Comment = block.GetComment()
for _, d := range block.GetDirectives() {
if d.GetName() == "server" {
us.UpstreamServers = append(us.UpstreamServers, NewUpstreamServer(d))
} else {
us.Directives = append(us.Directives, d)
}
}
return us, nil
}
return nil, errors.New("missing upstream block")
}
func (us *Upstream) AddServer(server *UpstreamServer) {
us.UpstreamServers = append(us.UpstreamServers, server)
}
func (us *Upstream) FindDirectives(directiveName string) []IDirective {
directives := make([]IDirective, 0)
for _, directive := range us.Directives {
if directive.GetName() == directiveName {
directives = append(directives, directive)
}
if directive.GetBlock() != nil {
directives = append(directives, directive.GetBlock().FindDirectives(directiveName)...)
}
}
return directives
}
func (us *Upstream) UpdateDirective(key string, params []string) {
if key == "" || len(params) == 0 {
return
}
directives := us.GetDirectives()
index := -1
for i, dir := range directives {
if dir.GetName() == key {
if IsRepeatKey(key) {
oldParams := dir.GetParameters()
if !(len(oldParams) > 0 && oldParams[0] == params[0]) {
continue
}
}
index = i
break
}
}
newDirective := &Directive{
Name: key,
Parameters: params,
}
if index > -1 {
directives[index] = newDirective
} else {
directives = append(directives, newDirective)
}
us.Directives = directives
}
func (us *Upstream) RemoveDirective(key string, params []string) {
directives := us.GetDirectives()
var newDirectives []IDirective
for _, dir := range directives {
if dir.GetName() == key {
if IsRepeatKey(key) && len(params) > 0 {
oldParams := dir.GetParameters()
if oldParams[0] == params[0] {
continue
}
} else {
continue
}
}
newDirectives = append(newDirectives, dir)
}
us.Directives = newDirectives
}
func (us *Upstream) GetLine() int {
return us.Line
}