fix: fixed a json encoding issue that caused the api.rest controller to return an empty list of events when a net.sniff http event is triggered

modules/api_rest_controller.go

@@ -40,7 +40,9 @@ func setSecurityHeaders(w http.ResponseWriter) {
 
 func toJSON(w http.ResponseWriter, o interface{}) {
 	w.Header().Set("Content-Type", "application/json")
-	json.NewEncoder(w).Encode(o)
+	if err := json.NewEncoder(w).Encode(o); err != nil {
+		log.Error("error while encoding object to JSON: %v", err)
+	}
 }
 
 func (api *RestAPI) checkAuth(r *http.Request) bool {

modules/events_view.go

@@ -2,8 +2,6 @@ package modules
 
 import (
 	"fmt"
-	"io/ioutil"
-	"net/http"
 	"os"
 	"strings"
 
@@ -128,17 +126,17 @@ func (s *EventsStream) viewSnifferEvent(e session.Event) {
 	misc := ""
 
 	if e.Tag == "net.sniff.leak.http" {
-		req := se.Data.(*http.Request)
+		req := se.Data.(HTTPRequest)
 		if req.Method != "GET" {
 			misc += "\n\n"
 			misc += fmt.Sprintf("  Method: %s\n", core.Yellow(req.Method))
-			misc += fmt.Sprintf("  URL: %s\n", core.Yellow(req.URL.String()))
+			misc += fmt.Sprintf("  URL: %s\n", core.Yellow(req.URL))
 			misc += fmt.Sprintf("  Headers:\n")
-			for name, values := range req.Header {
+			for name, values := range req.Headers {
 				misc += fmt.Sprintf("    %s => %s\n", core.Green(name), strings.Join(values, ", "))
 			}
 
-			if err := req.ParseForm(); err == nil {
+			if req.Form != nil {
 				misc += "  \n  Form:\n\n"
 				if len(req.Form) == 0 {
 					misc += fmt.Sprintf("    %s\n", core.Dim("<empty>"))
@@ -148,8 +146,7 @@ func (s *EventsStream) viewSnifferEvent(e session.Event) {
 					}
 				}
 			} else if req.Body != nil {
-				b, _ := ioutil.ReadAll(req.Body)
-				misc += fmt.Sprintf("  \n  %s:\n\n    %s\n", core.Bold("Body"), string(b))
+				misc += fmt.Sprintf("  \n  %s:\n\n    %s\n", core.Bold("Body"), string(req.Body))
 			}
 		}
 	}

modules/net_sniff_event.go

@@ -10,12 +10,12 @@ import (
 type SniffData map[string]interface{}
 
 type SnifferEvent struct {
-	PacketTime  time.Time
-	Protocol    string
-	Source      string
-	Destination string
-	Message     string
-	Data        interface{}
+	PacketTime  time.Time   `json:"time"`
+	Protocol    string      `json:"protocol"`
+	Source      string      `json:"from"`
+	Destination string      `json:"to"`
+	Message     string      `json:"message"`
+	Data        interface{} `json:"data"`
 }
 
 func NewSnifferEvent(t time.Time, proto string, src string, dst string, data interface{}, format string, args ...interface{}) SnifferEvent {

modules/net_sniff_http.go

@@ -3,7 +3,9 @@ package modules
 import (
 	"bufio"
 	"bytes"
+	"io/ioutil"
 	"net/http"
+	"net/url"
 
 	"github.com/bettercap/bettercap/core"
 
@@ -11,6 +13,35 @@ import (
 	"github.com/google/gopacket/layers"
 )
 
+type HTTPRequest struct {
+	Method  string      `json:"method"`
+	Host    string      `json:"host"`
+	URL     string      `json:"url:"`
+	Headers http.Header `json:"headers"`
+	Form    url.Values  `json:"form"`
+	Body    []byte      `json:"body"`
+}
+
+func toSerializableRequest(req *http.Request) HTTPRequest {
+	body := []byte(nil)
+	form := (url.Values)(nil)
+
+	if err := req.ParseForm(); err == nil {
+		form = req.Form
+	} else if req.Body != nil {
+		body, _ = ioutil.ReadAll(req.Body)
+	}
+
+	return HTTPRequest{
+		Method:  req.Method,
+		Host:    req.Host,
+		URL:     req.URL.String(),
+		Headers: req.Header,
+		Form:    form,
+		Body:    body,
+	}
+}
+
 func httpParser(ip *layers.IPv4, pkt gopacket.Packet, tcp *layers.TCP) bool {
 	data := tcp.Payload
 	reader := bufio.NewReader(bytes.NewReader(data))
@@ -22,7 +53,7 @@ func httpParser(ip *layers.IPv4, pkt gopacket.Packet, tcp *layers.TCP) bool {
 			"http",
 			ip.SrcIP.String(),
 			req.Host,
-			req,
+			toSerializableRequest(req),
 			"%s %s %s %s%s %s",
 			core.W(core.BG_RED+core.FG_BLACK, "http"),
 			vIP(ip.SrcIP),