- Update all main abstractions

- Desighn a new interfaces responsible for the whole PubSub
- New plugin - websockets

Signed-off-by: Valery Piashchynski <[email protected]>

2 files changed, 137 insertions, 0 deletions

diff --git a/plugins/websockets/validator/access_validator.go b/plugins/websockets/validator/access_validator.go
new file mode 100644
index 00000000..9d9522d4
--- /dev/null
+++ b/plugins/websockets/validator/access_validator.go
@@ -0,0 +1,102 @@
+package validator
+
+import (
+	"bytes"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/spiral/roadrunner/v2/plugins/http/attributes"
+)
+
+type AccessValidator struct {
+	buffer *bytes.Buffer
+	header http.Header
+	status int
+}
+
+func NewValidator() *AccessValidator {
+	return &AccessValidator{
+		buffer: bytes.NewBuffer(nil),
+		header: make(http.Header),
+	}
+}
+
+// Copy all content to parent response writer.
+func (w *AccessValidator) Copy(rw http.ResponseWriter) {
+	rw.WriteHeader(w.status)
+
+	for k, v := range w.header {
+		for _, vv := range v {
+			rw.Header().Add(k, vv)
+		}
+	}
+
+	_, _ = io.Copy(rw, w.buffer)
+}
+
+// Header returns the header map that will be sent by WriteHeader.
+func (w *AccessValidator) Header() http.Header {
+	return w.header
+}
+
+// Write writes the data to the connection as part of an HTTP reply.
+func (w *AccessValidator) Write(p []byte) (int, error) {
+	return w.buffer.Write(p)
+}
+
+// WriteHeader sends an HTTP response header with the provided status code.
+func (w *AccessValidator) WriteHeader(statusCode int) {
+	w.status = statusCode
+}
+
+// IsOK returns true if response contained 200 status code.
+func (w *AccessValidator) IsOK() bool {
+	return w.status == 200
+}
+
+// Body returns response body to rely to user.
+func (w *AccessValidator) Body() []byte {
+	return w.buffer.Bytes()
+}
+
+// Error contains server response.
+func (w *AccessValidator) Error() string {
+	return w.buffer.String()
+}
+
+// AssertServerAccess checks if user can join server and returns error and body if user can not. Must return nil in
+// case of error
+func (w *AccessValidator) AssertServerAccess(f http.HandlerFunc, r *http.Request) error {
+	if err := attributes.Set(r, "ws:joinServer", true); err != nil {
+		return err
+	}
+
+	defer delete(attributes.All(r), "ws:joinServer")
+
+	f(w, r)
+
+	if !w.IsOK() {
+		return w
+	}
+
+	return nil
+}
+
+// AssertTopicsAccess checks if user can access given upstream, the application will receive all user headers and cookies.
+// the decision to authorize user will be based on response code (200).
+func (w *AccessValidator) AssertTopicsAccess(f http.HandlerFunc, r *http.Request, channels ...string) error {
+	if err := attributes.Set(r, "ws:joinTopics", strings.Join(channels, ",")); err != nil {
+		return err
+	}
+
+	defer delete(attributes.All(r), "ws:joinTopics")
+
+	f(w, r)
+
+	if !w.IsOK() {
+		return w
+	}
+
+	return nil
+}
diff --git a/plugins/websockets/validator/access_validator_test.go b/plugins/websockets/validator/access_validator_test.go
new file mode 100644
index 00000000..4a07b00f
--- /dev/null
+++ b/plugins/websockets/validator/access_validator_test.go
@@ -0,0 +1,35 @@
+package validator
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestResponseWrapper_Body(t *testing.T) {
+	w := NewValidator()
+	_, _ = w.Write([]byte("hello"))
+
+	assert.Equal(t, []byte("hello"), w.Body())
+}
+
+func TestResponseWrapper_Header(t *testing.T) {
+	w := NewValidator()
+	w.Header().Set("k", "value")
+
+	assert.Equal(t, "value", w.Header().Get("k"))
+}
+
+func TestResponseWrapper_StatusCode(t *testing.T) {
+	w := NewValidator()
+	w.WriteHeader(200)
+
+	assert.True(t, w.IsOK())
+}
+
+func TestResponseWrapper_StatusCodeBad(t *testing.T) {
+	w := NewValidator()
+	w.WriteHeader(400)
+
+	assert.False(t, w.IsOK())
+}