Traffic Monitor

The Traffic Monitor is the central hub of RelayCraft, providing a real-time view of all HTTP and HTTPS traffic passing through the proxy. It allows you to inspect request details, filter for specific flows, and analyze performance.

Main Interface

The traffic view displays a list of network requests with key information:

• Method: HTTP method (GET, POST, etc.).
• Status: HTTP status code (200, 404, 500, etc.) with color coding.
• Host & Path: The destination server and resource path.
• Size: Response body size.
• Time: Duration of the request.
• Type: Content type (JSON, HTML, Image, etc.).

Filtering Traffic

Use the Filter Bar at the top to narrow down the traffic list.

Basic Filtering

Type any text to match against the URL, method, or status code.

• api matches requests containing “api”.
• POST matches POST requests.
• 404 matches requests with status 404.

Advanced Search Syntax

RelayCraft supports powerful advanced search syntax for precise traffic filtering.

Keywords:

• method:POST - Only show POST requests.
• status:4xx - Show requests with status codes 400-499 (supports 2xx, 3xx, 4xx, 5xx).
• type:json - Show requests with Content-Type as JSON.
• size:>1mb - Show requests with response body larger than 1MB (supports kb, mb).
• duration:>500ms - Show requests taking longer than 500ms (supports ms, s).
• -domain:google - Exclude requests where the domain contains “google”.

Query Logic:

• Intersection (AND): Separate different conditions with spaces.
  • Example: method:POST type:json (Must be POST AND JSON).
• Union (OR): Enter multiple conditions of the same type.
  • Example: status:4xx status:5xx (Show 4xx OR 5xx requests).
• Exclusion: Prefix the condition with -.
  • Example: -domain:google (Exclude Google-related requests).
• Comparison: Supports > (greater than) and < (less than).
  • Example: size:>1mb (Larger than 1MB).

Advanced Options

• Regex: Enable Regular Expression mode for complex pattern matching.
• Case Sensitive: Toggle case sensitivity for the filter.
• Only Matched: Hide unmatched requests entirely instead of just dimming them.

AI Filter

Click the AI Assistant icon in the filter bar to generate filter patterns using natural language.

• Example: “Show me all failed POST requests to api.example.com”

Flow Details

Clicking on any request in the list opens the Flow Detail panel on the right.

Request & Response

• Headers: View and copy HTTP headers.
• Body: Inspect the request/response body with syntax highlighting for JSON, XML, HTML, etc.
  • Supports pretty-printing for minified code.
  • Image preview for image responses.
• Cookies: View parsed cookies.

Overview

• Timing: Detailed breakdown of the request lifecycle (DNS, TCP, SSL, TTFB, Download).
• General: Protocol version, TLS version, and connection details.

Context Actions

Right-click on any request to access quick actions:

• Copy: Copy URL, cURL command, or Request/Response body.
• Replay: Resend the request immediately.
• Compose: Edit the request in the Composer before sending.
• Create Rule: Quickly create a Map Local or Rewrite rule based on this request.
• Add Breakpoint: Stop future requests matching this URL to modify them on the fly.

Breakpoints

Breakpoints allow you to pause a request or response to modify it before it proceeds.

1. Set a Breakpoint: Right-click a request or use the Breakpoint Manager.
2. Trigger: When a matching request is made, RelayCraft pauses execution.
3. Edit: You can modify headers, body, or status code in the suspended state.
4. Resume: Click “Resume” to send the modified request/response to its destination.