153 lines
3.1 KiB
Go
153 lines
3.1 KiB
Go
package rbmd
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import (
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"net/http"
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"log"
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"encoding/json"
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"strings"
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"time"
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"github.com/gorilla/websocket"
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)
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//ServerConf configuration of http api server
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type ServerConf struct {
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Addr string
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Ws string
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}
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//MountHandler /mount location
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func (wr wrr) MountHandler (w http.ResponseWriter, r *http.Request) {
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decoder := json.NewDecoder(r.Body)
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var m RBDDevice
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err := decoder.Decode(&m)
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log.Print("[DEBUG] ", m)
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var msE []byte
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if err != nil {
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msE, _ = json.Marshal(MountState{"FAIL", "JSON parse failure"})
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w.Write(msE)
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return
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}
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// var wCh chan MountState
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wCh := make(chan MountState, 1)
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go func() { wCh <- wr.z.WatchAnswer(m.Node, "mount") }()
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err = wr.z.MountRequest(m)
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if err != nil {
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w.Write(msE)
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}
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answerState := <-wCh
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log.Print(answerState)
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wr.z.RMR(strings.Join([]string{wr.z.Path, "cluster", wr.Fqdn, "answers", "mount"}, "/"))
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state, err := json.Marshal(answerState)
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if err != nil {
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log.Print("[ERROR] ", err)
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w.Write(msE)
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}
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w.Write(state)
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}
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//wrr API
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type wrr struct {
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Fqdn string
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z ZooNode
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}
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//ServeHTTP start http server
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func (s ServerConf) ServeHTTP(z ZooNode, fqdn string) {
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// Return JSON of full quorum status
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http.HandleFunc("/status", func(w http.ResponseWriter, r *http.Request) {
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w.Write(z.GetState())
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})
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// Return string with quorum health check result
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http.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
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w.Write([]byte(z.GetQuorumHealth()))
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})
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// Return JSON of node description
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http.HandleFunc("/node", func(w http.ResponseWriter, r *http.Request) {
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n := GetNodeState(fqdn)
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state, err := json.Marshal(n)
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if err != nil {
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log.Fatal(err)
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}
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w.Write(state)
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})
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wr := wrr{
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fqdn,
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z,
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}
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// Mount volume. Accept JSON. Return JSON.
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http.HandleFunc("/mount", wr.MountHandler)
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// Umount volume. Accept JSON. Return JSON.
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http.HandleFunc("/umount", func(w http.ResponseWriter, r *http.Request) {
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w.Write([]byte("Not implemented yet."))
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})
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server := &http.Server{
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Addr: s.Addr,
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}
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log.Fatal(server.ListenAndServe())
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}
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//Writer ws
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type Writer struct {
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Upgrader websocket.Upgrader
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z ZooNode
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}
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//WriteStatusWs wrtite quorum status to websockets client
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func (wr Writer) WriteStatusWs(w http.ResponseWriter, r *http.Request) {
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c, err := wr.Upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Print("[Ws ERROR] Upgrade: ", err)
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}
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mt, _, err := c.ReadMessage()
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if err != nil {
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log.Print("[Ws ERROR] Read error: ", err)
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// break
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return
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}
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go func() {
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for {
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err = c.WriteMessage(mt, wr.z.GetState())
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if err != nil {
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log.Print("[Ws ERROR] Write err: ", err)
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defer c.Close()
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break
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}
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time.Sleep(time.Duration(1) * time.Second)
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}
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}()
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}
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//ServeWebSockets start websockets server
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func (s ServerConf) ServeWebSockets(z ZooNode) {
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var wsUpgrader = websocket.Upgrader{
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ReadBufferSize: 4096,
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WriteBufferSize: 4096,
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CheckOrigin: func(r *http.Request) bool {
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return true
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},
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}
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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Writer{wsUpgrader, z}.WriteStatusWs(w, r)
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})
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server := &http.Server{
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Addr: s.Ws,
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}
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log.Fatal(server.ListenAndServe())
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}
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