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json.go
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json.go
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package engine
import (
"encoding/json"
"fmt"
"github.com/mailgun/vulcand/plugin"
)
type rawServers struct {
Servers []json.RawMessage
}
type rawBackends struct {
Backends []json.RawMessage
}
type rawMiddlewares struct {
Middlewares []json.RawMessage
}
type rawFrontends struct {
Frontends []json.RawMessage
}
type rawHosts struct {
Hosts []json.RawMessage
}
type rawListeners struct {
Listeners []json.RawMessage
}
type rawFrontend struct {
Id string
Route string
Type string
BackendId string
Settings json.RawMessage
Stats *RoundTripStats
}
type rawBackend struct {
Id string
Type string
Settings json.RawMessage
Stats *RoundTripStats
}
type RawMiddleware struct {
Id string
Type string
Priority int
Middleware json.RawMessage
}
func HostsFromJSON(in []byte) ([]Host, error) {
var hs rawHosts
err := json.Unmarshal(in, &hs)
if err != nil {
return nil, err
}
out := []Host{}
if len(hs.Hosts) != 0 {
for _, raw := range hs.Hosts {
h, err := HostFromJSON(raw)
if err != nil {
return nil, err
}
out = append(out, *h)
}
}
return out, nil
}
func FrontendsFromJSON(in []byte) ([]Frontend, error) {
var rf *rawFrontends
err := json.Unmarshal(in, &rf)
if err != nil {
return nil, err
}
out := make([]Frontend, len(rf.Frontends))
for i, raw := range rf.Frontends {
f, err := FrontendFromJSON(raw)
if err != nil {
return nil, err
}
out[i] = *f
}
return out, nil
}
func HostFromJSON(in []byte, name ...string) (*Host, error) {
var h *Host
err := json.Unmarshal(in, &h)
if err != nil {
return nil, err
}
if len(name) != 0 {
h.Name = name[0]
}
return NewHost(h.Name, h.Settings)
}
func ListenerFromJSON(in []byte, id ...string) (*Listener, error) {
var rl *Listener
err := json.Unmarshal(in, &rl)
if err != nil {
return nil, err
}
if len(id) != 0 {
rl.Id = id[0]
}
if rl.Protocol == HTTPS && rl.Settings != nil {
if _, err = NewTLSConfig(&rl.Settings.TLS); err != nil {
return nil, err
}
}
return NewListener(rl.Id, rl.Protocol, rl.Address.Network, rl.Address.Address, rl.Scope, rl.Settings)
}
func ListenersFromJSON(in []byte) ([]Listener, error) {
var rls *rawListeners
if err := json.Unmarshal(in, &rls); err != nil {
return nil, err
}
out := make([]Listener, len(rls.Listeners))
if len(out) == 0 {
return out, nil
}
for i, rl := range rls.Listeners {
l, err := ListenerFromJSON(rl)
if err != nil {
return nil, err
}
out[i] = *l
}
return out, nil
}
func KeyPairFromJSON(in []byte) (*KeyPair, error) {
var c *KeyPair
err := json.Unmarshal(in, &c)
if err != nil {
return nil, err
}
return NewKeyPair(c.Cert, c.Key)
}
func FrontendFromJSON(in []byte, id ...string) (*Frontend, error) {
var rf *rawFrontend
if err := json.Unmarshal(in, &rf); err != nil {
return nil, err
}
if rf.Type != HTTP {
return nil, fmt.Errorf("Unsupported frontend type: %v", rf.Type)
}
var s HTTPFrontendSettings
if rf.Settings != nil {
if err := json.Unmarshal(rf.Settings, &s); err != nil {
return nil, err
}
}
if len(id) != 0 {
rf.Id = id[0]
}
f, err := NewHTTPFrontend(rf.Id, rf.BackendId, rf.Route, s)
if err != nil {
return nil, err
}
f.Stats = rf.Stats
return f, nil
}
func MiddlewareFromJSON(in []byte, getter plugin.SpecGetter, id ...string) (*Middleware, error) {
var ms *RawMiddleware
err := json.Unmarshal(in, &ms)
if err != nil {
return nil, err
}
spec := getter(ms.Type)
if spec == nil {
return nil, fmt.Errorf("middleware of type %s is not supported", ms.Type)
}
m, err := spec.FromJSON(ms.Middleware)
if err != nil {
return nil, err
}
if len(id) != 0 {
ms.Id = id[0]
}
return &Middleware{
Id: ms.Id,
Type: ms.Type,
Middleware: m,
Priority: ms.Priority,
}, nil
}
func BackendsFromJSON(in []byte) ([]Backend, error) {
var rbs *rawBackends
if err := json.Unmarshal(in, &rbs); err != nil {
return nil, err
}
out := make([]Backend, len(rbs.Backends))
if len(out) == 0 {
return out, nil
}
for i, rb := range rbs.Backends {
b, err := BackendFromJSON(rb)
if err != nil {
return nil, err
}
out[i] = *b
}
return out, nil
}
func BackendFromJSON(in []byte, id ...string) (*Backend, error) {
var rb *rawBackend
if err := json.Unmarshal(in, &rb); err != nil {
return nil, err
}
if rb.Type != HTTP {
return nil, fmt.Errorf("Unsupported backend type %v", rb.Type)
}
var s HTTPBackendSettings
if rb.Settings != nil {
if err := json.Unmarshal(rb.Settings, &s); err != nil {
return nil, err
}
}
if s.TLS != nil {
if _, err := NewTLSConfig(s.TLS); err != nil {
return nil, err
}
}
if len(id) != 0 {
rb.Id = id[0]
}
b, err := NewHTTPBackend(rb.Id, s)
if err != nil {
return nil, err
}
b.Stats = rb.Stats
return b, nil
}
func ServersFromJSON(in []byte) ([]Server, error) {
var rs *rawServers
if err := json.Unmarshal(in, &rs); err != nil {
return nil, err
}
out := make([]Server, len(rs.Servers))
if len(out) == 0 {
return out, nil
}
for i, rs := range rs.Servers {
s, err := ServerFromJSON(rs)
if err != nil {
return nil, err
}
out[i] = *s
}
return out, nil
}
func MiddlewaresFromJSON(in []byte, getter plugin.SpecGetter) ([]Middleware, error) {
var rm *rawMiddlewares
if err := json.Unmarshal(in, &rm); err != nil {
return nil, err
}
out := make([]Middleware, len(rm.Middlewares))
if len(out) == 0 {
return out, nil
}
for i, r := range rm.Middlewares {
m, err := MiddlewareFromJSON(r, getter)
if err != nil {
return nil, err
}
out[i] = *m
}
return out, nil
}
func ServerFromJSON(in []byte, id ...string) (*Server, error) {
var e *Server
err := json.Unmarshal(in, &e)
if err != nil {
return nil, err
}
if len(id) != 0 {
e.Id = id[0]
}
return NewServer(e.Id, e.URL)
}