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http.go
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http.go
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package main
import (
"fmt"
"gopkg.in/yaml.v2"
"net/http"
)
const keyTraefikLBServers = "servers"
type HTTPHandler struct {
im *InstanceManager
}
type TraefikHTTPConfig struct {
HTTP TraefikHTTPServices `yaml:"http,omitempty" json:"http,omitempty"`
}
type TraefikTCPConfig struct {
TCP TraefikTCPServices `yaml:"tcp,omitempty" json:"tcp,omitempty"`
}
type TraefikTCPServices struct {
Services map[string]TraefikService `yaml:"services,omitempty" json:"services,omitempty"`
}
type TraefikHTTPServices struct {
Services map[string]TraefikService `yaml:"services,omitempty" json:"services,omitempty"`
}
type TraefikService struct {
LoadBalancer map[string]interface{} `yaml:"loadBalancer,omitempty" json:"loadBalancer,omitempty"`
}
func (hh *HTTPHandler) ProvideHTTPServices(w http.ResponseWriter, r *http.Request) {
totalServices := len(hh.im.InstanceGroupRegistrar.Services)
loadedServices := len(hh.im.ActiveServers.TCP) + len(hh.im.ActiveServers.HTTP)
if totalServices == 0 {
w.WriteHeader(http.StatusLocked)
w.Write([]byte("loading config"))
return
}
if loadedServices < totalServices && totalServices > 0 {
w.WriteHeader(http.StatusLocked)
w.Write([]byte(fmt.Sprintf("still fetching, loading: %d / %d", loadedServices, totalServices)))
return
}
res := TraefikHTTPConfig{
HTTP: TraefikHTTPServices{
Services: make(map[string]TraefikService),
},
}
for service, lb := range hh.im.ActiveServers.HTTP {
lboptions := map[string]interface{}{}
if lb.Options != nil {
lboptions = lb.Options
}
ts := TraefikService{
LoadBalancer: lboptions,
}
ts.LoadBalancer[keyTraefikLBServers] = lb.Servers
res.HTTP.Services[service] = ts
}
encoded, err := yaml.Marshal(res)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(fmt.Sprint("error marshaling json, err: ", err)))
return
}
w.Header().Add("content-type", "text/yaml")
w.WriteHeader(http.StatusOK)
w.Write(encoded)
}
func (hh *HTTPHandler) ProvideTCPServices(w http.ResponseWriter, r *http.Request) {
totalServices := len(hh.im.InstanceGroupRegistrar.Services)
loadedServices := len(hh.im.ActiveServers.TCP) + len(hh.im.ActiveServers.HTTP)
if totalServices == 0 {
w.WriteHeader(http.StatusLocked)
w.Write([]byte("loading config"))
return
}
if loadedServices < totalServices && totalServices > 0 {
w.WriteHeader(http.StatusLocked)
w.Write([]byte(fmt.Sprintf("still fetching, loading: %d / %d", loadedServices, totalServices)))
return
}
res := TraefikTCPConfig{
TCP: TraefikTCPServices{
Services: make(map[string]TraefikService),
},
}
for service, lb := range hh.im.ActiveServers.TCP {
lboptions := map[string]interface{}{}
if lb.Options != nil {
lboptions = lb.Options
}
ts := TraefikService{
LoadBalancer: lboptions,
}
ts.LoadBalancer[keyTraefikLBServers] = lb.Servers
res.TCP.Services[service] = ts
}
encoded, err := yaml.Marshal(res)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(fmt.Sprint("error marshaling json, err: ", err)))
return
}
w.Header().Add("content-type", "text/yaml")
w.WriteHeader(http.StatusOK)
w.Write(encoded)
}