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URL rules ​

URL patterns are the way to override almost any setting, configure an action, or simply block it. Patterns match the URL path only - query parameters are ignored during pattern matching. Use match_query for query parameter conditions.

Actions ​

Each URL rule requires an action that determines how Edge Gateway handles matching requests.

render ​

Render the page using headless Chrome and cache the result. Settings merge with host/global configuration - you only need to specify overrides.

yaml
url_rules:
  # Override only cache TTL, inherit everything else from host/global
  - match: "/blog/*"
    action: "render"
    render:
      cache:
        ttl: 4h

  # Override multiple settings
  - match: "/heavy-page"
    action: "render"
    render:
      timeout: 60s
      cache:
        ttl: 2h
        expired:
          strategy: "serve_stale"
          stale_ttl: 24h
      events:
        additional_wait: 500ms
      blocked_resource_types:
        - Image
        - Media

bypass ​

Fetch the page directly from the origin server without rendering. Settings merge with host/global configuration - you only need to specify overrides.

yaml
url_rules:
  # Enable caching for this pattern, inherit timeout from host/global
  - match: "/api/*"
    action: "bypass"
    bypass:
      cache:
        enabled: true
        ttl: 5m

  # Override timeout and enable caching
  - match: "/slow-api/*"
    action: "bypass"
    bypass:
      timeout: 30s
      cache:
        enabled: true
        ttl: 1m
        status_codes: [200, 201]

block / status_403 ​

Return 403 Forbidden. block is an alias for status_403.

yaml
url_rules:
  - match: ["/admin/*", "/wp-admin/*"]
    action: "status_403"
    status:
      reason: "Admin areas not available for bots"

status_404 ​

Return 404 Not Found. Use for soft-deleted content.

yaml
url_rules:
  - match: ["/removed/*", "/archived/*"]
    action: "status_404"
    status:
      reason: "Content no longer available"
      headers:
        X-Removal-Date: "2024-01-15"

status_410 ​

Return 410 Gone. Use for permanently removed content.

yaml
url_rules:
  - match: "/discontinued/*"
    action: "status_410"
    status:
      reason: "Product line discontinued"

status ​

Return a custom status code (3xx, 4xx, 5xx) with optional headers and reason.

Required fields:

  • status.code - HTTP status code (300-599)
  • status.headers.Location - required for 3xx redirects
yaml
url_rules:
  # Permanent redirect
  - match: "/old-homepage"
    action: "status"
    status:
      code: 301
      headers:
        Location: "https://example.com/"

  # Temporary redirect
  - match: "/maintenance"
    action: "status"
    status:
      code: 302
      headers:
        Location: "https://example.com/maintenance-page"

  # Rate limiting
  - match: "/api/rate-limited/*"
    action: "status"
    status:
      code: 429
      reason: "Too many requests"
      headers:
        Retry-After: "3600"

Path patterns ​

Exact patterns ​

Match the path exactly as written. No special characters.

yaml
url_rules:
  - match: "/about"
    action: "render"

Matches: /about, /about?ref=homepage Does not match: /about/team, /about-us

Wildcard patterns ​

Use * for recursive matching at any depth. There is no ** syntax - a single * matches any number of path segments.

yaml
url_rules:
  - match: "/blog/*"
    action: "render"
  - match: "*.pdf"
    action: "bypass"

/blog/* matches:

  • /blog/post
  • /blog/2024/post
  • /blog/2024/jan/post

*.pdf matches:

  • /document.pdf
  • /files/report.pdf
  • /archive/2024/q1/summary.pdf?download=true

Regexp patterns ​

Use ~ prefix for case-sensitive matching, ~* for case-insensitive.

yaml
url_rules:
  - match: "~/api/v[0-9]+/.*"
    action: "bypass"
  - match: "~*/.*\\.(jpg|png|gif)$"
    action: "bypass"

~/api/v[0-9]+/.* matches: /api/v1/users, /api/v2/posts

~*/.*\\.(jpg|png|gif)$ matches: /photo.JPG, /images/logo.PNG

Query parameter matching ​

Use match_query to add conditions based on query parameters. This works alongside path patterns.

Matching logic ​

  • Between parameters: AND logic - all specified parameters must match
  • Within array values: OR logic - parameter must match one of the values

Pattern types ​

Query values support the same pattern types as paths:

  • Exact: "tech" matches only tech
  • Wildcard: "*" matches any non-empty value
  • Regexp: "~^[0-9]+$" for case-sensitive, "~*^[a-z]+$" for case-insensitive

Examples ​

yaml
url_rules:
  # Parameter must exist with any non-empty value
  - match: "/search"
    match_query:
      q: "*"
    action: "render"

  # Parameter must match one of the values (OR)
  - match: "/products"
    match_query:
      category: ["electronics", "clothing", "home"]
    action: "render"

  # Multiple parameters must all match (AND)
  - match: "/api/data"
    match_query:
      format: "json"
      page: "~^[0-9]+$"
    action: "bypass"

The last rule matches /api/data?format=json&page=5 but not /api/data?format=xml&page=5 (wrong format) or /api/data?format=json&page=abc (page not numeric).

Testing rules ​

Use the -t flag to test your configuration and see how URLs will be processed without starting the server.

Validate configuration ​

bash
./edge-gateway -c configs/edge-gateway.yaml -t

Output shows validation status and any warnings:

configuration file configs/edge-gateway.yaml syntax is ok
configuration test is successful

Test a specific URL ​

Pass a URL as the first argument to see which rule matches and what action will be taken:

bash
# Test absolute URL against specific host
./edge-gateway -c configs/edge-gateway.yaml -t https://example.com/blog/post

# Test relative path against all configured hosts
./edge-gateway -c configs/edge-gateway.yaml -t /api/users

Output shows:

  • Normalized URL and hash (for cache key debugging)
  • Matched pattern (or "default" if no pattern matched)
  • Action and resolved configuration

Example output:

=== Host: example.com (host_id: 1) ===
URL: https://example.com/blog/post
Normalized URL: https://example.com/blog/post
URL Hash: 177635683940360438

Matched Pattern: /blog/*
Action: render

Cache TTL: 7200s (2h)

Rendering:
  - Timeout: 30s
  - Wait Until: networkIdle

Exit code is 0 for success, 1 for errors.