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package com
import (
"encoding/json"
"errors"
"net/http"
"github.com/gorilla/mux"
"github.com/rootless-containers/bypass4netns/pkg/api"
)
type Backend struct {
BypassDriver BypassDriver
}
type BypassDriver interface {
ListInterfaces() map[string]ContainerInterfaces
GetInterface(id string) *ContainerInterfaces
PostInterface(id string, containerIfs *ContainerInterfaces)
DeleteInterface(id string)
}
func AddRoutes(r *mux.Router, b *Backend) {
v1 := r.PathPrefix("/v1").Subrouter()
_ = v1
v1.Path("/ping").Methods("GET").HandlerFunc(b.ping)
v1.Path("/interfaces").Methods("GET").HandlerFunc(b.listInterfaces)
v1.Path("/interface/{id}").Methods("GET").HandlerFunc(b.getInterface)
v1.Path("/interface/{id}").Methods("POST").HandlerFunc(b.postInterface)
v1.Path("/interface/{id}").Methods("DELETE").HandlerFunc(b.deleteInterface)
}
func (b *Backend) onError(w http.ResponseWriter, r *http.Request, err error, ec int) {
w.WriteHeader(ec)
w.Header().Set("Content-Type", "application/json")
// it is safe to return the err to the client, because the client is reliable
e := api.ErrorJSON{
Message: err.Error(),
}
_ = json.NewEncoder(w).Encode(e)
}
func (b *Backend) ping(w http.ResponseWriter, r *http.Request) {
m, err := json.Marshal("pong")
if err != nil {
b.onError(w, r, err, http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
_, _ = w.Write(m)
}
func (b *Backend) listInterfaces(w http.ResponseWriter, r *http.Request) {
ifs := b.BypassDriver.ListInterfaces()
m, err := json.Marshal(ifs)
if err != nil {
b.onError(w, r, err, http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
_, _ = w.Write(m)
}
func (b *Backend) getInterface(w http.ResponseWriter, r *http.Request) {
id, ok := mux.Vars(r)["id"]
if !ok {
b.onError(w, r, errors.New("id not specified"), http.StatusBadRequest)
return
}
ifs := b.BypassDriver.GetInterface(id)
if ifs == nil {
b.onError(w, r, errors.New("not found"), http.StatusNotFound)
return
}
m, err := json.Marshal(ifs)
if err != nil {
b.onError(w, r, err, http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
_, _ = w.Write(m)
}
func (b *Backend) postInterface(w http.ResponseWriter, r *http.Request) {
id, ok := mux.Vars(r)["id"]
if !ok {
b.onError(w, r, errors.New("id not specified"), http.StatusBadRequest)
return
}
decoder := json.NewDecoder(r.Body)
var containerIfs ContainerInterfaces
if err := decoder.Decode(&containerIfs); err != nil {
b.onError(w, r, err, http.StatusBadRequest)
return
}
b.BypassDriver.PostInterface(id, &containerIfs)
ifs := b.BypassDriver.GetInterface(id)
m, err := json.Marshal(ifs)
if err != nil {
b.onError(w, r, err, http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
_, _ = w.Write(m)
}
func (b *Backend) deleteInterface(w http.ResponseWriter, r *http.Request) {
id, ok := mux.Vars(r)["id"]
if !ok {
b.onError(w, r, errors.New("id not specified"), http.StatusBadRequest)
return
}
b.BypassDriver.DeleteInterface(id)
}
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