Add reply endpoint for http (#1168)

agent/main.go

@@ -131,6 +131,7 @@ func hostApi(socketHarOutputChannel chan<- *tapApi.OutputChannelItem) *gin.Engin
 	routes.MetadataRoutes(ginApp)
 	routes.StatusRoutes(ginApp)
 	routes.DbRoutes(ginApp)
+	routes.ReplayRoutes(ginApp)
 
 	return ginApp
 }
@@ -155,7 +156,7 @@ func runInTapperMode() {
 
 	hostMode := os.Getenv(shared.HostModeEnvVar) == "1"
 	tapOpts := &tap.TapOpts{
-		HostMode:     hostMode,
+		HostMode: hostMode,
 	}
 
 	filteredOutputItemsChannel := make(chan *tapApi.OutputChannelItem)

agent/pkg/controllers/replay_controller.go

@@ -0,0 +1,34 @@
+package controllers
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/up9inc/mizu/agent/pkg/replay"
+	"github.com/up9inc/mizu/agent/pkg/validation"
+	"github.com/up9inc/mizu/logger"
+)
+
+const (
+	replayTimeout = 10 * time.Second
+)
+
+func ReplayRequest(c *gin.Context) {
+	logger.Log.Debug("Starting replay")
+	replayDetails := &replay.Details{}
+	if err := c.Bind(replayDetails); err != nil {
+		c.JSON(http.StatusBadRequest, err)
+		return
+	}
+
+	logger.Log.Debugf("Validating replay, %v", replayDetails)
+	if err := validation.Validate(replayDetails); err != nil {
+		c.JSON(http.StatusBadRequest, err)
+		return
+	}
+
+	logger.Log.Debug("Executing replay, %v", replayDetails)
+	result := replay.ExecuteRequest(replayDetails, replayTimeout)
+	c.JSON(http.StatusOK, result)
+}

agent/pkg/providers/tappedPods/tapped_pods_provider.go

@@ -60,7 +60,7 @@ func GetTappedPodsStatus() []shared.TappedPodStatus {
 
 func SetNodeToTappedPodMap(nodeToTappedPodsMap shared.NodeToPodsMap) {
 	summary := nodeToTappedPodsMap.Summary()
-	logger.Log.Infof("Setting node to tapped pods map to %v", summary)
+	logger.Log.Debugf("Setting node to tapped pods map to %v", summary)
 
 	nodeHostToTappedPodsMap = nodeToTappedPodsMap
 }

agent/pkg/replay/replay.go

@@ -0,0 +1,167 @@
+package replay
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/up9inc/mizu/agent/pkg/app"
+	tapApi "github.com/up9inc/mizu/tap/api"
+	mizuhttp "github.com/up9inc/mizu/tap/extensions/http"
+)
+
+var (
+	inProcessRequestsLocker = sync.Mutex{}
+	inProcessRequests       = 0
+)
+
+const maxParallelAction = 5
+
+type Details struct {
+	Method  string            `json:"method"`
+	Url     string            `json:"url"`
+	Body    string            `json:"body"`
+	Headers map[string]string `json:"headers"`
+}
+
+type Response struct {
+	Success      bool        `json:"status"`
+	Data         interface{} `json:"data"`
+	ErrorMessage string      `json:"errorMessage"`
+}
+
+func incrementCounter() bool {
+	result := false
+	inProcessRequestsLocker.Lock()
+	if inProcessRequests < maxParallelAction {
+		inProcessRequests++
+		result = true
+	}
+	inProcessRequestsLocker.Unlock()
+	return result
+}
+
+func decrementCounter() {
+	inProcessRequestsLocker.Lock()
+	inProcessRequests--
+	inProcessRequestsLocker.Unlock()
+}
+
+func getEntryFromRequestResponse(extension *tapApi.Extension, request *http.Request, response *http.Response) *tapApi.Entry {
+	captureTime := time.Now()
+
+	itemTmp := tapApi.OutputChannelItem{
+		Protocol: *extension.Protocol,
+		ConnectionInfo: &tapApi.ConnectionInfo{
+			ClientIP:   "",
+			ClientPort: "1",
+			ServerIP:   "",
+			ServerPort: "1",
+			IsOutgoing: false,
+		},
+		Capture:   "",
+		Timestamp: time.Now().UnixMilli(),
+		Pair: &tapApi.RequestResponsePair{
+			Request: tapApi.GenericMessage{
+				IsRequest:   true,
+				CaptureTime: captureTime,
+				CaptureSize: 0,
+				Payload: &mizuhttp.HTTPPayload{
+					Type: mizuhttp.TypeHttpRequest,
+					Data: request,
+				},
+			},
+			Response: tapApi.GenericMessage{
+				IsRequest:   false,
+				CaptureTime: captureTime,
+				CaptureSize: 0,
+				Payload: &mizuhttp.HTTPPayload{
+					Type: mizuhttp.TypeHttpResponse,
+					Data: response,
+				},
+			},
+		},
+	}
+
+	// Analyze is expecting an item that's marshalled and unmarshalled
+	itemMarshalled, err := json.Marshal(itemTmp)
+	if err != nil {
+		return nil
+	}
+	var finalItem *tapApi.OutputChannelItem
+	if err := json.Unmarshal(itemMarshalled, &finalItem); err != nil {
+		return nil
+	}
+
+	return extension.Dissector.Analyze(finalItem, "", "", "")
+}
+
+func ExecuteRequest(replayData *Details, timeout time.Duration) *Response {
+	if incrementCounter() {
+		defer decrementCounter()
+
+		client := &http.Client{
+			Timeout: timeout,
+		}
+
+		request, err := http.NewRequest(strings.ToUpper(replayData.Method), replayData.Url, bytes.NewBufferString(replayData.Body))
+		if err != nil {
+			return &Response{
+				Success:      false,
+				Data:         nil,
+				ErrorMessage: err.Error(),
+			}
+		}
+
+		for headerKey, headerValue := range replayData.Headers {
+			request.Header.Add(headerKey, headerValue)
+		}
+		request.Header.Add("x-mizu", uuid.New().String())
+		response, requestErr := client.Do(request)
+
+		if requestErr != nil {
+			return &Response{
+				Success:      false,
+				Data:         nil,
+				ErrorMessage: requestErr.Error(),
+			}
+		}
+
+		extension := app.ExtensionsMap["http"] // # TODO: maybe pass the extension to the function so it can be tested
+		entry := getEntryFromRequestResponse(extension, request, response)
+		base := extension.Dissector.Summarize(entry)
+		var representation []byte
+		representation, err = extension.Dissector.Represent(entry.Request, entry.Response)
+		if err != nil {
+			return &Response{
+				Success:      false,
+				Data:         nil,
+				ErrorMessage: err.Error(),
+			}
+		}
+
+		return &Response{
+			Success: true,
+			Data: &tapApi.EntryWrapper{
+				Protocol:       *extension.Protocol,
+				Representation: string(representation),
+				Data:           entry,
+				Base:           base,
+				Rules:          nil,
+				IsRulesEnabled: false,
+			},
+			ErrorMessage: "",
+		}
+	} else {
+		return &Response{
+			Success:      false,
+			Data:         nil,
+			ErrorMessage: fmt.Sprintf("reached threshold of %d requests", maxParallelAction),
+		}
+	}
+}

agent/pkg/replay/replay_internal_test.go

@@ -0,0 +1,108 @@
+package replay
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+	"strings"
+	"testing"
+	"time"
+
+	"encoding/json"
+
+	"github.com/google/uuid"
+	tapApi "github.com/up9inc/mizu/tap/api"
+	mizuhttp "github.com/up9inc/mizu/tap/extensions/http"
+)
+
+func TestValid(t *testing.T) {
+	client := &http.Client{
+		Timeout: 10 * time.Second,
+	}
+
+	tests := map[string]*Details{
+		"40x": {
+			Method:  "GET",
+			Url:     "http://httpbin.org/status/404",
+			Body:    "",
+			Headers: map[string]string{},
+		},
+		"20x": {
+			Method:  "GET",
+			Url:     "http://httpbin.org/status/200",
+			Body:    "",
+			Headers: map[string]string{},
+		},
+		"50x": {
+			Method:  "GET",
+			Url:     "http://httpbin.org/status/500",
+			Body:    "",
+			Headers: map[string]string{},
+		},
+		// TODO: this should be fixes, currently not working because of header name with ":"
+		//":path-header": {
+		//	Method: "GET",
+		//	Url:    "http://httpbin.org/get",
+		//	Body:   "",
+		//	Headers: map[string]string{
+		//		":path": "/get",
+		//	},
+		// },
+	}
+
+	for testCaseName, replayData := range tests {
+		t.Run(fmt.Sprintf("%+v", testCaseName), func(t *testing.T) {
+			request, err := http.NewRequest(strings.ToUpper(replayData.Method), replayData.Url, bytes.NewBufferString(replayData.Body))
+			if err != nil {
+				t.Errorf("Error executing request")
+			}
+
+			for headerKey, headerValue := range replayData.Headers {
+				request.Header.Add(headerKey, headerValue)
+			}
+			request.Header.Add("x-mizu", uuid.New().String())
+			response, requestErr := client.Do(request)
+
+			if requestErr != nil {
+				t.Errorf("failed: %v, ", requestErr)
+			}
+
+			extensionHttp := &tapApi.Extension{}
+			dissectorHttp := mizuhttp.NewDissector()
+			dissectorHttp.Register(extensionHttp)
+			extensionHttp.Dissector = dissectorHttp
+			extension := extensionHttp
+
+			entry := getEntryFromRequestResponse(extension, request, response)
+			base := extension.Dissector.Summarize(entry)
+
+			// Represent is expecting an entry that's marshalled and unmarshalled
+			entryMarshalled, err := json.Marshal(entry)
+			if err != nil {
+				t.Errorf("failed marshaling entry: %v, ", err)
+			}
+			var entryUnmarshalled *tapApi.Entry
+			if err := json.Unmarshal(entryMarshalled, &entryUnmarshalled); err != nil {
+				t.Errorf("failed unmarshaling entry: %v, ", err)
+			}
+
+			var representation []byte
+			representation, err = extension.Dissector.Represent(entryUnmarshalled.Request, entryUnmarshalled.Response)
+			if err != nil {
+				t.Errorf("failed: %v, ", err)
+			}
+
+			result := &tapApi.EntryWrapper{
+				Protocol:       *extension.Protocol,
+				Representation: string(representation),
+				Data:           entry,
+				Base:           base,
+				Rules:          nil,
+				IsRulesEnabled: false,
+			}
+			t.Logf("%+v", result)
+			//data, _ := json.MarshalIndent(result, "", "  ")
+			//t.Logf("%+v", string(data))
+		})
+	}
+}

agent/pkg/routes/replay_routes.go

@@ -0,0 +1,13 @@
+package routes
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/up9inc/mizu/agent/pkg/controllers"
+)
+
+// ReplayRoutes defines the group of replay routes.
+func ReplayRoutes(app *gin.Engine) {
+	routeGroup := app.Group("/replay")
+
+	routeGroup.POST("/", controllers.ReplayRequest)
+}

shared/models.go

@@ -55,7 +55,6 @@ type WebSocketMessageMetadata struct {
 	MessageType WebSocketMessageType `json:"messageType,omitempty"`
 }
 
-
 type WebSocketStatusMessage struct {
 	*WebSocketMessageMetadata
 	TappingStatus []TappedPodStatus `json:"tappingStatus"`