API Rest Interface answers to servers and server/{id}

- built envelope based on AJ spec, self standing package with transaction ID increment and unix time stamps
- fixed servers end point
- created server/{id} end point
- created rest mappings for GET

rvpn/envelope/envelope.go

@@ -0,0 +1,43 @@
+package envelope
+
+import "time"
+import "encoding/json"
+import "bytes"
+import "io"
+
+//Envelope -- Standard daplie response structure
+type Envelope struct {
+	TransactionType      string      `json:"type"`
+	Schema               string      `json:"schema"`
+	TransactionTimeStamp int64       `json:"txts"`
+	TransactionID        int64       `json:"txid"`
+	Error                string      `json:"error"`
+	ErrorDescription     string      `json:"error_description"`
+	ErrorURI             string      `json:"error_uri"`
+	Result               interface{} `json:"result"`
+}
+
+//NewEnvelope -- Constructor
+func NewEnvelope(transactionType string) (p *Envelope) {
+	transactionID++
+
+	p = new(Envelope)
+	p.TransactionType = transactionType
+	p.TransactionID = transactionID
+	p.TransactionTimeStamp = time.Now().Unix()
+	p.Error = "ok"
+
+	return
+}
+
+//Generate -- encode into JSON and return string
+func (e *Envelope) Generate() string {
+	buf := new(bytes.Buffer)
+	json.NewEncoder(buf).Encode(e)
+	return buf.String()
+}
+
+//GenerateWriter --
+func (e *Envelope) GenerateWriter(w io.Writer) {
+	json.NewEncoder(w).Encode(e)
+}

rvpn/envelope/setup.go

@@ -0,0 +1,19 @@
+package envelope
+
+import (
+	"log"
+	"os"
+)
+
+var (
+	loginfo       *log.Logger
+	logdebug      *log.Logger
+	logFlags      = log.Ldate | log.Lmicroseconds | log.Lshortfile
+	transactionID int64
+)
+
+func init() {
+	loginfo = log.New(os.Stdout, "INFO: envelope: ", logFlags)
+	logdebug = log.New(os.Stdout, "DEBUG: envelope:", logFlags)
+	transactionID = 1
+}

rvpn/genericlistener/api_collect_server.go

@@ -0,0 +1,31 @@
+package genericlistener
+
+import (
+	"fmt"
+	"time"
+)
+
+//ServerAPI -- Structure to support the server API
+type ServerAPI struct {
+	ServerName string       `json:"server_name"`
+	ServerID   int64        `json:"server_id"`
+	Domains    []*DomainAPI `json:"domains"`
+	Duration   float64      `json:"duration"`
+	BytesIn    int64        `json:"bytes_in"`
+	BytesOut   int64        `json:"bytes_out"`
+	Source     string       `json:"source_address"`
+}
+
+//NewServerAPI - Constructor
+func NewServerAPI(c *Connection) (s *ServerAPI) {
+	s = new(ServerAPI)
+	s.ServerName = fmt.Sprintf("%p", c)
+	s.ServerID = c.ConnectionID()
+	s.Domains = make([]*DomainAPI, 0)
+	s.Duration = time.Since(c.ConnectTime()).Seconds()
+	s.BytesIn = c.BytesIn()
+	s.BytesOut = c.BytesOut()
+	s.Source = c.source
+
+	return
+}

rvpn/genericlistener/api_collect_servers.go

@@ -5,23 +5,27 @@ import (
 	"time"
 )
 
-//ServerAPI -- Structure to support the server API
-type ServerAPI struct {
+//ServersAPI -- Structure to support the server API
+type ServersAPI struct {
 	ServerName string       `json:"server_name"`
+	ServerID   int64        `json:"server_id"`
 	Domains    []*DomainAPI `json:"domains"`
 	Duration   float64      `json:"duration"`
 	BytesIn    int64        `json:"bytes_in"`
 	BytesOut   int64        `json:"bytes_out"`
+	Source     string       `json:"source_address"`
 }
 
-//NewServerAPI - Constructor
-func NewServerAPI(c *Connection) (s *ServerAPI) {
-	s = new(ServerAPI)
+//NewServersAPI - Constructor
+func NewServersAPI(c *Connection) (s *ServersAPI) {
+	s = new(ServersAPI)
 	s.ServerName = fmt.Sprintf("%p", c)
+	s.ServerID = c.ConnectionID()
 	s.Domains = make([]*DomainAPI, 0)
 	s.Duration = time.Since(c.ConnectTime()).Seconds()
 	s.BytesIn = c.BytesIn()
 	s.BytesOut = c.BytesOut()
+	s.Source = c.Source()
 
 	for d := range c.DomainTrack {
 		dt := c.DomainTrack[d]
@@ -33,12 +37,12 @@ func NewServerAPI(c *Connection) (s *ServerAPI) {
 
 //ServerAPIContainer -- Holder for all the Servers
 type ServerAPIContainer struct {
-	Servers []*ServerAPI `json:"servers"`
+	Servers []*ServersAPI `json:"servers"`
 }
 
 //NewServerAPIContainer -- Constructor
 func NewServerAPIContainer() (p *ServerAPIContainer) {
 	p = new(ServerAPIContainer)
-	p.Servers = make([]*ServerAPI, 0)
+	p.Servers = make([]*ServersAPI, 0)
 	return p
 }

rvpn/genericlistener/api_endpoints.go

@@ -1,25 +0,0 @@
-package genericlistener
-
-import "net/http"
-
-type apiEndPoint struct {
-	pack     string
-	endpoint string
-	method   func(w http.ResponseWriter, r *http.Request)
-}
-
-type APIEndPoints struct {
-	endPoint map[string]*apiEndPoint
-}
-
-//NewAPIEndPoints -- Constructor
-func NewAPIEndPoints() (p *APIEndPoints) {
-	p = new(apiEndPoints)
-	p.endPoint = make(map[string]*apiEndPoint)
-	return
-}
-
-func (p *apiEndPoints) add(pack string, endpoint string, method func(w http.ResponseWriter, r *http.Request)) {
-
-	router.HandleFunc("/api/"+rDNSPackageName+"servers", apiServers)
-}

rvpn/genericlistener/api_interface.go

@@ -2,16 +2,18 @@ package genericlistener
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
 	"net/http"
+	"runtime"
+	"strconv"
 	"strings"
 
+	"git.daplie.com/Daplie/go-rvpn-server/rvpn/envelope"
 	"github.com/gorilla/mux"
 )
 
 const (
-	rDNSPackageName = "com.daplie.rvpn"
+	endPointPrefix = "/api/com.daplie.rvpn/"
 )
 
 var connectionTable *Table
@@ -23,8 +25,6 @@ func handleAdminClient(ctx context.Context, oneConn *oneConnListener) {
 	connectionTable = ctx.Value(ctxConnectionTable).(*Table)
 	router := mux.NewRouter().StrictSlash(true)
 
-	endpoints := make(map[string]string)
-
 	router.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 		loginfo.Println("HandleFunc /")
 		switch url := r.URL.Path; url {
@@ -41,10 +41,12 @@ func handleAdminClient(ctx context.Context, oneConn *oneConnListener) {
 
 	router.HandleFunc("/admin", func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "text/html; charset=utf-8")
-		fmt.Fprintln(w, "<html>Welcome..press <a href=/api/servers>Servers</a> to access stats</html>")
+		fmt.Fprintln(w, "<html>Welcome..press <a href=/api/com.daplie.rvpn/servers>Servers</a> to access stats</html>")
 	})
 
-	router.HandleFunc("/api/"+rDNSPackageName+"servers", apiServers)
+	router.HandleFunc(endPointPrefix+"servers", getServersEndpoint).Methods("GET")
+	router.HandleFunc(endPointPrefix+"server/", getServerEndpoint).Methods("GET")
+	router.HandleFunc(endPointPrefix+"server/{server-id}", getServerEndpoint).Methods("GET")
 
 	s := &http.Server{
 		Addr:    ":80",
@@ -63,17 +65,60 @@ func handleAdminClient(ctx context.Context, oneConn *oneConnListener) {
 	}
 }
 
-func apiServers(w http.ResponseWriter, r *http.Request) {
-	fmt.Println("here")
+func getServersEndpoint(w http.ResponseWriter, r *http.Request) {
+	pc, _, _, _ := runtime.Caller(0)
+	loginfo.Println(runtime.FuncForPC(pc).Name())
+
 	serverContainer := NewServerAPIContainer()
 
 	for c := range connectionTable.Connections() {
-		serverAPI := NewServerAPI(c)
+		serverAPI := NewServersAPI(c)
 		serverContainer.Servers = append(serverContainer.Servers, serverAPI)
 
 	}
 
 	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
-	json.NewEncoder(w).Encode(serverContainer)
+
+	env := envelope.NewEnvelope("servers/GET")
+	env.Result = serverContainer
+	env.GenerateWriter(w)
+
+	//json.NewEncoder(w).Encode(serverContainer)
 
 }
+
+func getServerEndpoint(w http.ResponseWriter, r *http.Request) {
+	pc, _, _, _ := runtime.Caller(0)
+	loginfo.Println(runtime.FuncForPC(pc).Name())
+
+	env := envelope.NewEnvelope("server/GET")
+
+	params := mux.Vars(r)
+	if id, ok := params["server-id"]; !ok {
+		env.Error = "server-id is missing"
+		env.ErrorURI = r.RequestURI
+		env.ErrorDescription = "server API requires a server-id"
+	} else {
+		serverID, err := strconv.Atoi(id)
+		if err != nil {
+			env.Error = "server-id is not an integer"
+			env.ErrorURI = r.RequestURI
+			env.ErrorDescription = "server API requires a server-id"
+
+		} else {
+			conn, err := connectionTable.GetConnection(int64(serverID))
+			if err != nil {
+				env.Error = "server-id was not found"
+				env.ErrorURI = r.RequestURI
+				env.ErrorDescription = "missing server-id, make sure desired service-id is in servers"
+			} else {
+				loginfo.Println("test")
+				serverAPI := NewServerAPI(conn)
+				env.Result = serverAPI
+
+			}
+		}
+	}
+	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
+	env.GenerateWriter(w)
+}

rvpn/genericlistener/connection.go

@@ -63,10 +63,15 @@ type Connection struct {
 
 	///wssState tracks a highlevel status of the connection, false means do nothing.
 	wssState bool
+
+	//connectionID
+	connectionID int64
 }
 
 //NewConnection -- Constructor
 func NewConnection(connectionTable *Table, conn *websocket.Conn, remoteAddress string, initialDomains []interface{}, connectionTrack *Tracking) (p *Connection) {
+	connectionID = connectionID + 1
+
 	p = new(Connection)
 	p.mutex = &sync.Mutex{}
 	p.connectionTable = connectionTable
@@ -85,6 +90,7 @@ func NewConnection(connectionTable *Table, conn *websocket.Conn, remoteAddress s
 	}
 
 	p.State(true)
+	p.connectionID = connectionID
 	return
 }
 
@@ -124,6 +130,11 @@ func (c *Connection) SendCh() chan *SendTrack {
 	return c.send
 }
 
+//Source --
+func (c *Connection) Source() string {
+	return c.source
+}
+
 func (c *Connection) addIn(num int64) {
 	c.bytesIn = c.bytesIn + num
 }
@@ -167,6 +178,11 @@ func (c *Connection) Update() {
 	c.lastUpdate = time.Now()
 }
 
+//ConnectionID - Get
+func (c *Connection) ConnectionID() int64 {
+	return c.connectionID
+}
+
 //NextWriter -- Wrapper to allow a high level state check before offering NextWriter
 //The libary failes if client abends during write-cycle.  a fast moving write is not caught before socket state bubbles up
 //A synchronised state is maintained

rvpn/genericlistener/connection_table.go

@@ -66,6 +66,19 @@ func (c *Table) reaper(delay int, idle int) {
 	}
 }
 
+//GetConnection -- find connection by server-id
+func (c *Table) GetConnection(serverID int64) (conn *Connection, err error) {
+	for conn := range c.connections {
+		if conn.ConnectionID() == serverID {
+			return conn, err
+		}
+	}
+
+	err = fmt.Errorf("Server-id %d not found", serverID)
+
+	return nil, err
+}
+
 //Run -- Execute
 func (c *Table) Run(ctx context.Context) {
 	loginfo.Println("ConnectionTable starting")

rvpn/genericlistener/setup.go

@@ -3,15 +3,21 @@ package genericlistener
 import (
 	"log"
 	"os"
+	"runtime"
 )
 
 var (
 	loginfo      *log.Logger
 	logdebug     *log.Logger
 	logFlags     = log.Ldate | log.Lmicroseconds | log.Lshortfile
+	connectionID int64
 )
 
 func init() {
 	loginfo = log.New(os.Stdout, "INFO: genericlistener: ", logFlags)
 	logdebug = log.New(os.Stdout, "DEBUG: genericlistener:", logFlags)
+	pc, _, _, _ := runtime.Caller(0)
+	loginfo.Println(runtime.FuncForPC(pc).Name())
+
+	connectionID = 0
 }