fix raw req single slash issue

cmd/integration-test/http.go

@@ -82,6 +82,7 @@ var httpTestcases = []TestCaseInfo{
 	{Path: "protocols/http/multi-request.yaml", TestCase: &httpMultiRequest{}},
 	{Path: "protocols/http/http-matcher-extractor-dy-extractor.yaml", TestCase: &httpMatcherExtractorDynamicExtractor{}},
 	{Path: "protocols/http/multi-http-var-sharing.yaml", TestCase: &httpMultiVarSharing{}},
+	{Path: "protocols/http/raw-path-single-slash.yaml", TestCase: &httpRawPathSingleSlash{}},
 }
 
 type httpMultiVarSharing struct{}
@@ -1560,3 +1561,28 @@ func (h *httpMultiRequest) Execute(filePath string) error {
 
 	return expectResultsCount(results, 1)
 }
+
+type httpRawPathSingleSlash struct{}
+
+func (h *httpRawPathSingleSlash) Execute(filepath string) error {
+	expectedPath := "/index.php"
+	results, err := testutils.RunNucleiBinaryAndGetCombinedOutput(debug, []string{"-t", filepath, "-u", "scanme.sh/index.php", "-debug-req"})
+	if err != nil {
+		return err
+	}
+
+	var actual string
+	for _, v := range strings.Split(results, "\n") {
+		if strings.Contains(v, "GET") {
+			parts := strings.Fields(v)
+			if len(parts) == 3 {
+				actual = parts[1]
+			}
+		}
+	}
+
+	if actual != expectedPath {
+		return fmt.Errorf("expected: %v\n\nactual: %v", expectedPath, actual)
+	}
+	return nil
+}

integration_tests/protocols/http/raw-path-single-slash.yaml

@@ -0,0 +1,13 @@
+id: raw-path-single-slash
+
+info:
+  name: Test RAW HTTP Template with single slash
+  author: pdteam
+  severity: info
+
+requests:
+  - raw:
+      - |
+        GET / HTTP/1.1
+        Host: {{Hostname}}
+        Origin: {{BaseURL}}

pkg/protocols/http/raw/raw.go

@@ -97,6 +97,13 @@ func Parse(request string, inputURL *urlutil.URL, unsafe, disablePathAutomerge b
 	default:
 		cloned := inputURL.Clone()
 		cloned.Params.IncludeEquals = true
+		// Edgecase if raw request is
+		// GET / HTTP/1.1
+		//use case: https://github.com/projectdiscovery/nuclei/issues/4921
+		if rawrequest.Path == "/" {
+			rawrequest.Path = ""
+		}
+
 		if disablePathAutomerge {
 			cloned.Path = ""
 		}