mirror of https://github.com/k3s-io/k3s
115 lines
2.9 KiB
Go
115 lines
2.9 KiB
Go
package router
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import (
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"context"
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"encoding/json"
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"net/http"
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"strconv"
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"github.com/gorilla/mux"
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"github.com/pkg/errors"
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"github.com/rootless-containers/rootlesskit/pkg/port"
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)
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type Backend struct {
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// PortDriver MUST be thread-safe.
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// PortDriver can be nil
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PortDriver port.ParentDriver
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}
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func (b *Backend) onError(w http.ResponseWriter, r *http.Request, err error, ec int) {
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w.WriteHeader(ec)
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w.Header().Set("Content-Type", "application/json")
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// it is safe to return the err to the client, because the client is reliable
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type errorJSON struct {
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Message string `json:"message"`
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}
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e := errorJSON{
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Message: err.Error(),
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}
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_ = json.NewEncoder(w).Encode(e)
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}
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func (b *Backend) onPortDriverNil(w http.ResponseWriter, r *http.Request) {
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b.onError(w, r, errors.New("no PortDriver is available"), http.StatusBadRequest)
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}
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// GetPorts is handler for GET /v{N}/ports
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func (b *Backend) GetPorts(w http.ResponseWriter, r *http.Request) {
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if b.PortDriver == nil {
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b.onPortDriverNil(w, r)
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return
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}
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ports, err := b.PortDriver.ListPorts(context.TODO())
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if err != nil {
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b.onError(w, r, err, http.StatusInternalServerError)
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return
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}
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m, err := json.Marshal(ports)
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if err != nil {
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b.onError(w, r, err, http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK)
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w.Write(m)
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}
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// PostPort is the handler for POST /v{N}/ports
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func (b *Backend) PostPort(w http.ResponseWriter, r *http.Request) {
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if b.PortDriver == nil {
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b.onPortDriverNil(w, r)
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return
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}
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decoder := json.NewDecoder(r.Body)
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var portSpec port.Spec
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if err := decoder.Decode(&portSpec); err != nil {
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b.onError(w, r, err, http.StatusBadRequest)
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return
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}
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portStatus, err := b.PortDriver.AddPort(context.TODO(), portSpec)
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if err != nil {
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b.onError(w, r, err, http.StatusBadRequest)
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return
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}
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m, err := json.Marshal(portStatus)
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if err != nil {
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b.onError(w, r, err, http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusCreated)
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w.Write(m)
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}
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// DeletePort is the handler for POST /v{N}/ports/{id}
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func (b *Backend) DeletePort(w http.ResponseWriter, r *http.Request) {
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if b.PortDriver == nil {
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b.onPortDriverNil(w, r)
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return
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}
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idStr, ok := mux.Vars(r)["id"]
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if !ok {
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b.onError(w, r, errors.New("id not specified"), http.StatusBadRequest)
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return
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}
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id, err := strconv.Atoi(idStr)
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if err != nil {
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b.onError(w, r, errors.Wrapf(err, "bad id %s", idStr), http.StatusBadRequest)
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return
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}
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if err := b.PortDriver.RemovePort(context.TODO(), id); err != nil {
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b.onError(w, r, err, http.StatusBadRequest)
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return
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}
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w.WriteHeader(http.StatusOK)
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}
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func AddRoutes(r *mux.Router, b *Backend) {
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v1 := r.PathPrefix("/v1").Subrouter()
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v1.Path("/ports").Methods("GET").HandlerFunc(b.GetPorts)
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v1.Path("/ports").Methods("POST").HandlerFunc(b.PostPort)
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v1.Path("/ports/{id}").Methods("DELETE").HandlerFunc(b.DeletePort)
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}
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