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json.go
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json.go
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package backend
import (
"encoding/json"
"fmt"
"github.com/mailgun/vulcand/plugin"
)
type rawHosts struct {
Hosts []json.RawMessage
}
type rawHost struct {
Name string
Locations []json.RawMessage
}
type rawLocations struct {
Locations []json.RawMessage
}
type rawLocation struct {
Hostname string
Path string
Id string
Upstream *Upstream
Middlewares []json.RawMessage
Options LocationOptions
Stats RoundTripStats
}
type rawMiddleware struct {
Id string
Type string
Priority int
Middleware json.RawMessage
}
func HostsFromJSON(in []byte, getter plugin.SpecGetter) ([]*Host, error) {
var hs *rawHosts
err := json.Unmarshal(in, &hs)
if err != nil {
return nil, err
}
out := []*Host{}
if hs.Hosts != nil {
for _, raw := range hs.Hosts {
h, err := HostFromJSON(raw, getter)
if err != nil {
return nil, err
}
out = append(out, h)
}
}
return out, nil
}
func LocationsFromJSON(in []byte, getter plugin.SpecGetter) ([]*Location, error) {
var rl *rawLocations
err := json.Unmarshal(in, &rl)
if err != nil {
return nil, err
}
out := make([]*Location, len(rl.Locations))
for i, raw := range rl.Locations {
l, err := LocationFromJSON(raw, getter)
if err != nil {
return nil, err
}
out[i] = l
}
return out, nil
}
func HostFromJSON(in []byte, getter plugin.SpecGetter) (*Host, error) {
var h *rawHost
err := json.Unmarshal(in, &h)
if err != nil {
return nil, err
}
out, err := NewHost(h.Name)
if err != nil {
return nil, err
}
if h.Locations != nil {
for _, raw := range h.Locations {
l, err := LocationFromJSON(raw, getter)
if err != nil {
return nil, err
}
out.Locations = append(out.Locations, l)
}
}
return out, nil
}
func ListenerFromJSON(in []byte) (*Listener, error) {
var l *Listener
err := json.Unmarshal(in, &l)
if err != nil {
return nil, err
}
return NewListener(l.Id, l.Protocol, l.Address.Network, l.Address.Address)
}
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 LocationFromJSON(in []byte, getter plugin.SpecGetter) (*Location, error) {
var l *rawLocation
err := json.Unmarshal(in, &l)
if err != nil {
return nil, err
}
loc, err := NewLocationWithOptions(l.Hostname, l.Id, l.Path, l.Upstream.Id, l.Options)
if err != nil {
return nil, err
}
loc.Upstream = l.Upstream
loc.Stats = l.Stats
for _, el := range l.Middlewares {
m, err := MiddlewareFromJSON(el, getter)
if err != nil {
return nil, err
}
loc.Middlewares = append(loc.Middlewares, m)
}
return loc, nil
}
func LocationOptionsFromJSON(in []byte) (*LocationOptions, error) {
var o *LocationOptions
err := json.Unmarshal(in, &o)
if err != nil {
return nil, err
}
if _, err := parseLocationOptions(*o); err != nil {
return nil, err
}
return o, nil
}
func MiddlewareFromJSON(in []byte, getter plugin.SpecGetter) (*MiddlewareInstance, 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
}
return &MiddlewareInstance{
Id: ms.Id,
Type: ms.Type,
Middleware: m,
Priority: ms.Priority,
}, nil
}
func UpstreamFromJSON(in []byte) (*Upstream, error) {
var u *Upstream
err := json.Unmarshal(in, &u)
if err != nil {
return nil, err
}
up, err := NewUpstreamWithOptions(u.Id, u.Options)
if err != nil {
return nil, err
}
up.Endpoints = u.Endpoints
return up, nil
}
func UpstreamOptionsFromJSON(in []byte) (*UpstreamOptions, error) {
var o *UpstreamOptions
err := json.Unmarshal(in, &o)
if err != nil {
return nil, err
}
if _, err := parseUpstreamOptions(*o); err != nil {
return nil, err
}
return o, nil
}
func EndpointFromJSON(in []byte) (*Endpoint, error) {
var e *Endpoint
err := json.Unmarshal(in, &e)
if err != nil {
return nil, err
}
return NewEndpoint(e.UpstreamId, e.Id, e.Url)
}