start messing about with streaming api

internal/api/client/streaming/stream.go

@@ -0,0 +1,46 @@
+package streaming
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/gorilla/websocket"
+)
+
+func (m *Module) StreamGETHandler(c *gin.Context) {
+	streamType := c.Query(StreamQueryKey)
+	if streamType == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("no stream type provided under query key %s", StreamQueryKey)})
+		return
+	}
+
+	accessToken := c.Query(AccessTokenQueryKey)
+	if accessToken == "" {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": fmt.Sprintf("no access token provided under query key %s", AccessTokenQueryKey)})
+		return
+	}
+
+	account, err := m.processor.AuthorizeStreamingRequest(accessToken)
+	if err != nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "could not authorize with given token"})
+		return
+	}
+
+	upgrader := websocket.Upgrader{
+		HandshakeTimeout: 5 * time.Second,
+		ReadBufferSize:   1024,
+		WriteBufferSize:  1024,
+		Subprotocols:     []string{"wss"},
+	}
+
+	conn, err := upgrader.Upgrade(c.Writer, c.Request, nil)
+	if err != nil {
+		return
+	}
+
+	if errWithCode := m.processor.StreamForAccount(conn, account, streamType); errWithCode != nil {
+		c.JSON(errWithCode.Code(), errWithCode.Safe())
+	}
+}