294 lines
7.1 KiB
Go
294 lines
7.1 KiB
Go
package main
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import "flag"
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import "io"
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import "log"
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import "net/http"
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import "encoding/json"
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import "io/ioutil"
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import "github.com/golang/protobuf/proto"
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import pb "git.wit.com/wit/witProtobuf"
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import "github.com/gorilla/websocket"
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import "github.com/davecgh/go-spew/spew"
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const (
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API = "http://stackapi:4000/"
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MAX_NETS = 10
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MAX_VMS = 10
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)
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type network struct {
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Subdomain string `json:"subdomain"`
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}
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func checkLogin(token string) bool {
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var networks []network
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req, err := http.NewRequest("GET", API + "me", nil)
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if err != nil {
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log.Println("can't make new req")
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return false
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}
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req.Header.Set("X-Wit-Auth", token)
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client := &http.Client{}
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resp, err := client.Do(req)
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if err != nil {
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log.Println("Can't exec the req to list networks: %s", err)
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return false
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}
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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log.Println("can't read resp")
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return false
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}
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log.Printf("RESPONSE =", body)
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if body == nil {
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log.Println("RESPONSE is nil")
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return false
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} else {
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len := len(body)
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err = json.Unmarshal(body, &networks)
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if err != nil {
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log.Println("body = ", body)
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log.Println("body len = ", len)
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log.Println("can't unmarshal resp for list networks: %s", err)
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return false
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}
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}
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spew.Dump(networks)
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return true
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}
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func fetchNetworks(token string) []network {
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var networks []network
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req, err := http.NewRequest("GET", API + "clusters", nil)
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if err != nil { log.Fatal("can't make new req") }
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req.Header.Set("X-Wit-Auth", token)
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client := &http.Client{}
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resp, err := client.Do(req)
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if err != nil { log.Printf("Can't exec the req to list networks: %s", err) }
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil { log.Fatal("can't read resp") }
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log.Printf("NETWORKS =", body)
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if body == nil {
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log.Println("networks is nil")
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} else {
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len := len(body)
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err = json.Unmarshal(body, &networks)
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if err != nil {
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log.Println("body = ", body)
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log.Println("body len = ", len)
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log.Println("can't unmarshal resp for list networks: %s", err)
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}
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}
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spew.Dump(networks)
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return networks
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}
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/*
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{
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"name": "vm10",
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"cpu": 4,
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"ram": 2048,
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"created_on": "2019-03-18T19:22:10.755428Z",
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"scope": "private",
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"role": "k8s-node",
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"stage": "Creating...",
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"seconds_left": 300,
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"base_image": "debcore_guest_latest",
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"address_list": [
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"192.168.0.1/32"
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]
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},
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*/
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type address struct {
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Address string
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}
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type vm struct {
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Name string `json:"name"`
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Role string `json:"role"`
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BaseImage string `json:"base_image"`
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}
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func fetchVMs(token string, network string) []vm {
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var vms []vm
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req, err := http.NewRequest("GET", API + "vms/" + network, nil)
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if err != nil { log.Fatal("can't make new req") }
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req.Header.Set("X-Wit-Auth", token)
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client := &http.Client{}
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resp, err := client.Do(req)
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if err != nil { log.Printf("Can't exec the req to fetch vms for %s: %s", network, err) }
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil { log.Fatal("can't read resp") }
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err = json.Unmarshal(body, &vms)
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if err != nil { log.Fatal("can't unmarshal resp for fetch vms: ", err, "\n\n", network, string(body)) }
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spew.Dump(vms)
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return vms
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}
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func processGetEvent(ge *pb.Event) *pb.Event {
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log.Println("processGetEvent() START")
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log.Println("processGetEvent() ge.Token =", ge.Token)
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e := pb.Event{}
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networks := fetchNetworks(ge.Token)
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for i, network := range(networks) {
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if i >= MAX_NETS {
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break
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}
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log.Println("network.Subdomain =",network.Subdomain)
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log.Println("network=",network)
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enetwork := pb.Event_Network{}
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enetwork.Name = network.Subdomain
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e.Networks = append(e.Networks, &enetwork)
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vms := fetchVMs(ge.Token, network.Subdomain)
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for j, vm := range(vms) {
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if j >= MAX_VMS {
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break
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}
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evm := pb.Event_VM{}
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evm.Name = vm.Name
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evm.Cpus = 1
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evm.Memory = 512
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evm.Disk = 20
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evm.Hostname = vm.Name + "." + enetwork.Name + ".lab.wit.com"
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e.Vms = append(e.Vms, &evm)
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log.Println("\tvm.Name =",vm.Name)
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log.Println("\tvm =",vm)
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}
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}
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return &e
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}
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func processLoginEvent(ge *pb.Event) *pb.Event {
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log.Println("processLoginEvent() START")
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log.Println("processLoginEvent() ge.Token =", ge.Token)
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log.Println("processLoginEvent() NEED TO LOGIN HERE OR CHECK TOKEN WORKS")
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checkLogin(ge.Token)
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log.Println("processLoginEvent() END")
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e := pb.Event{}
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return &e
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}
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// Also potentially look at:
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// https://www.reddit.com/r/golang/comments/boznnz/an_alternative_to_gorilla_sessions_jeff_manage/
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var upgrader = websocket.Upgrader{
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ReadBufferSize: 4096,
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WriteBufferSize: 4096,
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EnableCompression: true,
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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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/*
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func sendSampleProtobuf(conn *websocket.Conn) {
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msg := pb.CreateSampleEvent()
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msg.Name = "test echo over gorilla websocket"
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data, _ := proto.Marshal(msg)
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err := conn.WriteMessage(websocket.BinaryMessage, data)
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if err != nil {
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log.Println("sendProtobuf() write:", err)
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}
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}
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*/
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func sendProtobuf(conn *websocket.Conn, msg *pb.Event) {
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data, _ := proto.Marshal(msg)
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err := conn.WriteMessage(websocket.BinaryMessage, data)
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if err != nil {
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log.Println("sendProtobuf() write:", err)
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}
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}
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func eventHandler(w http.ResponseWriter, r *http.Request) {
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log.Println("echoHandler() START")
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log.Println("echoHandler() ATTEMPT r.Header.Get", r.Header.Get("User-Agent"))
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log.Println("echoHandler() ATTEMPT r.Header", r.Header)
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for key, value := range r.Header {
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log.Println("echoHandler() HEADER key, value =", key, value)
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}
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conn, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Println("Upgrade:", err)
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return
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}
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defer conn.Close()
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for {
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mytype, message, err := conn.ReadMessage()
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if err != nil {
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log.Println("read:", err)
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return
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}
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if mytype == websocket.TextMessage {
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log.Println("echoHandler() TextMessage mytype=", mytype)
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}
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if mytype == websocket.BinaryMessage {
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log.Println("echoHandler() BinaryMessage mytype=", mytype)
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pdata := new(pb.Event)
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err = proto.Unmarshal(message, pdata)
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if (err != nil) {
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log.Printf("readConn() something fucked up happened in Unmarshal")
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}
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log.Printf("recv binary: %s", pdata)
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if pdata.Type == pb.Event_MIGRATE {
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log.Printf("GOT MIGRATE")
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e := processGetEvent(pdata)
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sendProtobuf(conn, e)
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}
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if pdata.Type == pb.Event_LOGIN {
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log.Printf("GOT LOGIN")
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e := processLoginEvent(pdata)
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sendProtobuf(conn, e)
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}
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if pdata.Type == pb.Event_GET {
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log.Printf("GOT GET")
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e := processGetEvent(pdata)
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sendProtobuf(conn, e)
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}
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}
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}
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}
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func serveHome(w http.ResponseWriter, r *http.Request) {
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if r.URL.Path != "/" {
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http.Error(w, "Not found.", http.StatusNotFound)
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return
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}
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if r.Method != "GET" {
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http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
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return
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}
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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io.WriteString(w, "<html><body>Echo Server</body></html>")
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}
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var addr = flag.String("addr", ":9000", "http service address")
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func main() {
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flag.Parse()
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http.HandleFunc("/", serveHome)
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http.HandleFunc("/event", eventHandler)
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log.Println("Starting http.ListenAndServe() on port 9000")
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err := http.ListenAndServe(*addr, nil)
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if err != nil {
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log.Fatal("ListenAndServe: ", err)
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}
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}
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