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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package handler
import (
"bytes"
"context"
"errors"
"fmt"
"io"
"net"
"net/http"
"net/http/httptest"
"testing"
"go.amzn.com/lambda/core"
"go.amzn.com/lambda/interop"
"go.amzn.com/lambda/telemetry"
"github.com/google/uuid"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/mock"
)
type mockSubscriptionAPI struct{ mock.Mock }
func (s *mockSubscriptionAPI) Subscribe(agentName string, body io.Reader, headers map[string][]string, remoteAddr string) ([]byte, int, map[string][]string, error) {
args := s.Called(agentName, body, headers, remoteAddr)
return args.Get(0).([]byte), args.Int(1), args.Get(2).(map[string][]string), args.Error(3)
}
func (s *mockSubscriptionAPI) RecordCounterMetric(metricName string, count int) {
s.Called(metricName, count)
}
func (s *mockSubscriptionAPI) FlushMetrics() interop.TelemetrySubscriptionMetrics {
args := s.Called()
return args.Get(0).(interop.TelemetrySubscriptionMetrics)
}
func (s *mockSubscriptionAPI) Clear() {
s.Called()
}
func (s *mockSubscriptionAPI) TurnOff() {
s.Called()
}
func (s *mockSubscriptionAPI) GetEndpointURL() string {
args := s.Called()
return args.Get(0).(string)
}
func (s *mockSubscriptionAPI) GetServiceClosedErrorMessage() string {
args := s.Called()
return args.Get(0).(string)
}
func (s *mockSubscriptionAPI) GetServiceClosedErrorType() string {
args := s.Called()
return args.Get(0).(string)
}
func validIPPort(addr string) bool {
ip, _, err := net.SplitHostPort(addr)
return err == nil && net.ParseIP(ip) != nil
}
func TestSuccessfulRuntimeLogsResponseProxy(t *testing.T) {
agentName, reqBody, reqHeaders := "dummyName", []byte(`foobar`), map[string][]string{"Key": []string{"VAL1", "VAL2"}}
respBody, respStatus, respHeaders := []byte(`barbaz`), http.StatusNotFound, map[string][]string{"K": []string{"V1", "V2"}}
clientErrMetric := telemetry.SubscribeClientErr
registrationService := core.NewRegistrationService(
core.NewInitFlowSynchronization(),
core.NewInvokeFlowSynchronization(),
)
agent, err := registrationService.CreateExternalAgent(agentName)
assert.NoError(t, err)
telemetrySubscription := &mockSubscriptionAPI{}
telemetrySubscription.On("Subscribe", agentName, bytes.NewReader(reqBody), reqHeaders, mock.MatchedBy(validIPPort)).Return(respBody, respStatus, respHeaders, nil)
telemetrySubscription.On("RecordCounterMetric", clientErrMetric, 1)
handler := NewRuntimeTelemetrySubscriptionHandler(registrationService, telemetrySubscription)
request := httptest.NewRequest("PUT", "/", bytes.NewBuffer(reqBody))
for k, vals := range reqHeaders {
for _, v := range vals {
request.Header.Add(k, v)
}
}
request = request.WithContext(context.WithValue(context.Background(), AgentIDCtxKey, agent.ID))
responseRecorder := httptest.NewRecorder()
handler.ServeHTTP(responseRecorder, request)
telemetrySubscription.AssertCalled(t, "Subscribe", agentName, bytes.NewReader(reqBody), reqHeaders, mock.MatchedBy(validIPPort))
telemetrySubscription.AssertCalled(t, "RecordCounterMetric", clientErrMetric, 1)
recordedBody, err := io.ReadAll(responseRecorder.Body)
assert.NoError(t, err)
assert.Equal(t, respStatus, responseRecorder.Code)
assert.Equal(t, respBody, recordedBody)
assert.Equal(t, http.Header(respHeaders), responseRecorder.Header())
}
func TestSuccessfulTelemetryAPIPutRequest(t *testing.T) {
agentName, reqBody, reqHeaders := "extensionName", []byte(`foobar`), map[string][]string{"Key": []string{"VAL1", "VAL2"}}
respBody, respStatus, respHeaders := []byte(`"OK"`), http.StatusOK, map[string][]string{"K": []string{"V1", "V2"}}
numSubscribersMetric := telemetry.NumSubscribers
subscribeSuccessMetric := telemetry.SubscribeSuccess
registrationService := core.NewRegistrationService(
core.NewInitFlowSynchronization(),
core.NewInvokeFlowSynchronization(),
)
agent, err := registrationService.CreateExternalAgent(agentName)
assert.NoError(t, err)
telemetrySubscription := &mockSubscriptionAPI{}
telemetrySubscription.On("Subscribe", agentName, bytes.NewReader(reqBody), reqHeaders, mock.MatchedBy(validIPPort)).Return(respBody, respStatus, respHeaders, nil)
telemetrySubscription.On("RecordCounterMetric", numSubscribersMetric, 1)
telemetrySubscription.On("RecordCounterMetric", subscribeSuccessMetric, 1)
handler := NewRuntimeTelemetrySubscriptionHandler(registrationService, telemetrySubscription)
request := httptest.NewRequest("PUT", "/", bytes.NewBuffer(reqBody))
for k, vals := range reqHeaders {
for _, v := range vals {
request.Header.Add(k, v)
}
}
request = request.WithContext(context.WithValue(context.Background(), AgentIDCtxKey, agent.ID))
responseRecorder := httptest.NewRecorder()
handler.ServeHTTP(responseRecorder, request)
telemetrySubscription.AssertCalled(t, "Subscribe", agentName, bytes.NewReader(reqBody), reqHeaders, mock.MatchedBy(validIPPort))
telemetrySubscription.AssertCalled(t, "RecordCounterMetric", numSubscribersMetric, 1)
telemetrySubscription.AssertCalled(t, "RecordCounterMetric", subscribeSuccessMetric, 1)
recordedBody, err := io.ReadAll(responseRecorder.Body)
assert.NoError(t, err)
assert.Equal(t, respStatus, responseRecorder.Code)
assert.Equal(t, respBody, recordedBody)
assert.Equal(t, http.Header(respHeaders), responseRecorder.Header())
}
func TestNumberOfSubscribersWhenAnExtensionIsAlreadySubscribed(t *testing.T) {
agentName, reqBody, reqHeaders := "extensionName", []byte(`foobar`), map[string][]string{"Key": []string{"VAL1", "VAL2"}}
respBody, respStatus, respHeaders := []byte(`"AlreadySubcribed"`), http.StatusOK, map[string][]string{"K": []string{"V1", "V2"}}
numSubscribersMetric := telemetry.NumSubscribers
subscribeSuccessMetric := telemetry.SubscribeSuccess
registrationService := core.NewRegistrationService(
core.NewInitFlowSynchronization(),
core.NewInvokeFlowSynchronization(),
)
agent, err := registrationService.CreateExternalAgent(agentName)
assert.NoError(t, err)
telemetrySubscription := &mockSubscriptionAPI{}
telemetrySubscription.On("Subscribe", agentName, bytes.NewReader(reqBody), reqHeaders, mock.MatchedBy(validIPPort)).Return(respBody, respStatus, respHeaders, nil)
telemetrySubscription.On("RecordCounterMetric", subscribeSuccessMetric, 1)
handler := NewRuntimeTelemetrySubscriptionHandler(registrationService, telemetrySubscription)
request := httptest.NewRequest("PUT", "/", bytes.NewBuffer(reqBody))
for k, vals := range reqHeaders {
for _, v := range vals {
request.Header.Add(k, v)
}
}
request = request.WithContext(context.WithValue(context.Background(), AgentIDCtxKey, agent.ID))
responseRecorder := httptest.NewRecorder()
handler.ServeHTTP(responseRecorder, request)
telemetrySubscription.AssertCalled(t, "Subscribe", agentName, bytes.NewReader(reqBody), reqHeaders, mock.MatchedBy(validIPPort))
telemetrySubscription.AssertCalled(t, "RecordCounterMetric", subscribeSuccessMetric, 1)
telemetrySubscription.AssertNotCalled(t, "RecordCounterMetric", numSubscribersMetric, mock.Anything)
recordedBody, err := io.ReadAll(responseRecorder.Body)
assert.NoError(t, err)
assert.Equal(t, respStatus, responseRecorder.Code)
assert.Equal(t, respBody, recordedBody)
assert.Equal(t, http.Header(respHeaders), responseRecorder.Header())
}
func TestErrorUnregisteredAgentID(t *testing.T) {
invalidAgentID := uuid.New()
reqBody, reqHeaders := []byte(`foobar`), map[string][]string{"Key": []string{"VAL1", "VAL2"}}
clientErrMetric := telemetry.SubscribeClientErr
registrationService := core.NewRegistrationService(
core.NewInitFlowSynchronization(),
core.NewInvokeFlowSynchronization(),
)
telemetrySubscription := &mockSubscriptionAPI{}
telemetrySubscription.On("RecordCounterMetric", clientErrMetric, 1)
handler := NewRuntimeTelemetrySubscriptionHandler(registrationService, telemetrySubscription)
request := httptest.NewRequest("PUT", "/", bytes.NewBuffer(reqBody))
for k, vals := range reqHeaders {
for _, v := range vals {
request.Header.Add(k, v)
}
}
request = request.WithContext(context.WithValue(context.Background(), AgentIDCtxKey, invalidAgentID))
responseRecorder := httptest.NewRecorder()
handler.ServeHTTP(responseRecorder, request)
recordedBody, err := io.ReadAll(responseRecorder.Body)
assert.NoError(t, err)
expectedErrorBody := fmt.Sprintf(`{"errorMessage":"Unknown extension %s","errorType":"Extension.UnknownExtensionIdentifier"}`+"\n", invalidAgentID.String())
expectedHeaders := http.Header(map[string][]string{"Content-Type": []string{"application/json"}})
assert.Equal(t, http.StatusForbidden, responseRecorder.Code)
assert.Equal(t, expectedErrorBody, string(recordedBody))
assert.Equal(t, expectedHeaders, responseRecorder.Header())
telemetrySubscription.AssertCalled(t, "RecordCounterMetric", clientErrMetric, 1)
}
func TestErrorTelemetryAPICallFailure(t *testing.T) {
agentName, reqBody, reqHeaders := "dummyName", []byte(`foobar`), map[string][]string{"Key": []string{"VAL1", "VAL2"}}
apiError := errors.New("Error calling Telemetry API: connection refused")
serverErrMetric := telemetry.SubscribeServerErr
registrationService := core.NewRegistrationService(
core.NewInitFlowSynchronization(),
core.NewInvokeFlowSynchronization(),
)
agent, err := registrationService.CreateExternalAgent(agentName)
assert.NoError(t, err)
telemetrySubscription := &mockSubscriptionAPI{}
telemetrySubscription.On("Subscribe", agentName, bytes.NewReader(reqBody), reqHeaders, mock.MatchedBy(validIPPort)).Return([]byte(``), http.StatusOK, map[string][]string{}, apiError)
telemetrySubscription.On("RecordCounterMetric", serverErrMetric, 1)
handler := NewRuntimeTelemetrySubscriptionHandler(registrationService, telemetrySubscription)
request := httptest.NewRequest("PUT", "/", bytes.NewBuffer(reqBody))
for k, vals := range reqHeaders {
for _, v := range vals {
request.Header.Add(k, v)
}
}
request = request.WithContext(context.WithValue(context.Background(), AgentIDCtxKey, agent.ID))
responseRecorder := httptest.NewRecorder()
handler.ServeHTTP(responseRecorder, request)
recordedBody, err := io.ReadAll(responseRecorder.Body)
assert.NoError(t, err)
expectedErrorBody := `{"errorMessage":"Internal Server Error","errorType":"InternalServerError"}` + "\n"
expectedHeaders := http.Header(map[string][]string{"Content-Type": []string{"application/json"}})
assert.Equal(t, http.StatusInternalServerError, responseRecorder.Code)
assert.Equal(t, expectedErrorBody, string(recordedBody))
assert.Equal(t, expectedHeaders, responseRecorder.Header())
telemetrySubscription.AssertCalled(t, "RecordCounterMetric", serverErrMetric, 1)
}
func TestRenderLogsSubscriptionClosed(t *testing.T) {
agentName, reqBody, reqHeaders := "dummyName", []byte(`foobar`), map[string][]string{"Key": []string{"VAL1", "VAL2"}}
apiError := telemetry.ErrTelemetryServiceOff
clientErrMetric := telemetry.SubscribeClientErr
registrationService := core.NewRegistrationService(
core.NewInitFlowSynchronization(),
core.NewInvokeFlowSynchronization(),
)
agent, err := registrationService.CreateExternalAgent(agentName)
assert.NoError(t, err)
telemetrySubscription := &mockSubscriptionAPI{}
telemetrySubscription.On("Subscribe", agentName, bytes.NewReader(reqBody), reqHeaders, mock.MatchedBy(validIPPort)).Return([]byte(``), http.StatusOK, map[string][]string{}, apiError)
telemetrySubscription.On("RecordCounterMetric", clientErrMetric, 1)
telemetrySubscription.On("GetServiceClosedErrorMessage").Return("Logs API subscription is closed already")
telemetrySubscription.On("GetServiceClosedErrorType").Return("Logs.SubscriptionClosed")
handler := NewRuntimeTelemetrySubscriptionHandler(registrationService, telemetrySubscription)
request := httptest.NewRequest("PUT", "/", bytes.NewBuffer(reqBody))
for k, vals := range reqHeaders {
for _, v := range vals {
request.Header.Add(k, v)
}
}
request = request.WithContext(context.WithValue(context.Background(), AgentIDCtxKey, agent.ID))
responseRecorder := httptest.NewRecorder()
handler.ServeHTTP(responseRecorder, request)
recordedBody, err := io.ReadAll(responseRecorder.Body)
assert.NoError(t, err)
expectedErrorBody := `{"errorMessage":"Logs API subscription is closed already","errorType":"Logs.SubscriptionClosed"}` + "\n"
expectedHeaders := http.Header(map[string][]string{"Content-Type": []string{"application/json"}})
assert.Equal(t, http.StatusForbidden, responseRecorder.Code)
assert.Equal(t, expectedErrorBody, string(recordedBody))
assert.Equal(t, expectedHeaders, responseRecorder.Header())
telemetrySubscription.AssertCalled(t, "RecordCounterMetric", clientErrMetric, 1)
}
func TestRenderTelemetrySubscriptionClosed(t *testing.T) {
agentName, reqBody, reqHeaders := "dummyName", []byte(`foobar`), map[string][]string{"Key": []string{"VAL1", "VAL2"}}
apiError := telemetry.ErrTelemetryServiceOff
clientErrMetric := telemetry.SubscribeClientErr
registrationService := core.NewRegistrationService(
core.NewInitFlowSynchronization(),
core.NewInvokeFlowSynchronization(),
)
agent, err := registrationService.CreateExternalAgent(agentName)
assert.NoError(t, err)
telemetrySubscription := &mockSubscriptionAPI{}
telemetrySubscription.On("Subscribe", agentName, bytes.NewReader(reqBody), reqHeaders, mock.MatchedBy(validIPPort)).Return([]byte(``), http.StatusOK, map[string][]string{}, apiError)
telemetrySubscription.On("RecordCounterMetric", clientErrMetric, 1)
telemetrySubscription.On("GetServiceClosedErrorMessage").Return("Telemetry API subscription is closed already")
telemetrySubscription.On("GetServiceClosedErrorType").Return("Telemetry.SubscriptionClosed")
handler := NewRuntimeTelemetrySubscriptionHandler(registrationService, telemetrySubscription)
request := httptest.NewRequest("PUT", "/", bytes.NewBuffer(reqBody))
for k, vals := range reqHeaders {
for _, v := range vals {
request.Header.Add(k, v)
}
}
request = request.WithContext(context.WithValue(context.Background(), AgentIDCtxKey, agent.ID))
responseRecorder := httptest.NewRecorder()
handler.ServeHTTP(responseRecorder, request)
recordedBody, err := io.ReadAll(responseRecorder.Body)
assert.NoError(t, err)
expectedErrorBody := `{"errorMessage":"Telemetry API subscription is closed already","errorType":"Telemetry.SubscriptionClosed"}` + "\n"
expectedHeaders := http.Header(map[string][]string{"Content-Type": []string{"application/json"}})
assert.Equal(t, http.StatusForbidden, responseRecorder.Code)
assert.Equal(t, expectedErrorBody, string(recordedBody))
assert.Equal(t, expectedHeaders, responseRecorder.Header())
telemetrySubscription.AssertCalled(t, "RecordCounterMetric", clientErrMetric, 1)
}