docs update + flags validation + debug logging

Author: Mzack9999

README.md

@@ -92,9 +92,10 @@ Usage:
 
 Flags:
 INPUT:
-   -l, -list string      input file containing list of hosts to process
-   -rr, -request string  file containing raw request
-   -u, -target string[]  input target host(s) to probe
+   -l, -list string              input file containing list of hosts to process
+   -rr, -request string          file containing raw request
+   -u, -target string[]          input target host(s) to probe
+   -im, -input-mode string       mode of input file (burp)
 
 PROBES:
    -sc, -status-code      display response status-code
@@ -279,6 +280,7 @@ For details about running httpx, see https://docs.projectdiscovery.io/tools/http
 # Notes
 
 - As default, `httpx` probe with **HTTPS** scheme and fall-back to **HTTP** only if **HTTPS** is not reachable.
+- Burp Suite XML exports can be used as input with `-l burp-export.xml -im burp`
 - The `-no-fallback` flag can be used to probe and display both **HTTP** and **HTTPS** result.
 - Custom scheme for ports can be defined, for example `-ports http:443,http:80,https:8443`
 - Custom resolver supports multiple protocol (**doh|tcp|udp**) in form of `protocol:resolver:port` (e.g. `udp:127.0.0.1:53`)

common/inputformats/burp.go

@@ -4,6 +4,7 @@ import (
 	"io"
 
 	"github.com/pkg/errors"
+	"github.com/projectdiscovery/gologger"
 	"github.com/seh-msft/burpxml"
 )
 
@@ -30,8 +31,9 @@ func (b *BurpFormat) Parse(input io.Reader, callback func(url string) bool) erro
 		return errors.Wrap(err, "could not parse burp xml")
 	}
 
-	for _, item := range items.Items {
+	for i, item := range items.Items {
 		if item.Url == "" {
+			gologger.Debug().Msgf("Skipping burp item %d: empty URL", i)
 			continue
 		}
 		if !callback(item.Url) {

runner/options.go

@@ -684,6 +684,10 @@ func (options *Options) ValidateOptions() error {
 		return fmt.Errorf("invalid input mode '%s', supported formats: %s", options.InputMode, inputformats.SupportedFormats())
 	}
 
+	if options.InputMode != "" && options.InputFile == "" {
+		return errors.New("-im/-input-mode requires -l/-list to specify an input file")
+	}
+
 	if options.Silent {
 		incompatibleFlagsList := flagsIncompatibleWithSilent(options)
 		if len(incompatibleFlagsList) > 0 {