Conditional request execution support in template

[ehsandeep]

Please describe your feature request:

Currently, conditional request / template execution is possible with workflows (sub-templates) which is useful for complex chains but not practical for quick and basic check in same template as such similar support needs to be extended in the template as well.

Describe the use case of this feature:

Writing a multi step template that needs to executed if previous request/matcher returns true to avoid sending unwanted additional requests in failed condition.

Here is an example template with conditional request execution using if annotation to confirm request execution only when previous match returns true.

id: basic-raw-example

info:
  name: Test RAW Template
  author: pdteam
  severity: info

requests:
  - raw:
      - |
        GET /req1 HTTP/1.1
        Host: {{Hostname}}
        Origin: {{BaseURL}}
        Connection: close

    matchers:
      - type: status
        status:
          - 200

  - raw:
      - |
        if: matcher_status_1 == true
        GET /req2 HTTP/1.1
        Host: {{Hostname}}
        Origin: {{BaseURL}}

      - |
        GET /req3 HTTP/1.1
        Host: {{Hostname}}
        Origin: {{BaseURL}}

      - |
        GET /req4 HTTP/1.1
        Host: {{Hostname}}
        Origin: {{BaseURL}}

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: word
        words:
          - "Test1"

Reference:

• https://github.com/projectdiscovery/nuclei/issues/2100
• https://github.com/projectdiscovery/nuclei/discussions/2016
• https://github.com/projectdiscovery/nuclei/issues/1879
• https://github.com/projectdiscovery/nuclei/issues/7