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@gocanto gocanto commented Jul 23, 2025

Summary by CodeRabbit

  • Refactor

    • Improved clarity and readability of Caddy configuration files with enhanced comments, updated indentation, and explicit routing for API and frontend requests.
    • Updated Makefile to support and validate both production and local Caddy configuration files independently.
  • Documentation

    • Added a new "Debugging" section to the Caddy README, including guidance on forwarding specific HTTP headers for debugging purposes.

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coderabbitai bot commented Jul 23, 2025

Walkthrough

The updates refine Caddy server configuration for both local and production environments, separating configuration files and improving documentation. The Makefile is adjusted to support validation and formatting of both Caddyfiles. Additionally, the Caddy readme receives a new debugging section with header-forwarding examples. No application logic or exported entities are affected.

Changes

File(s) Change Summary
caddy/Caddyfile.local Updated comments, indentation, and formatting for clarity; no functional or logic changes.
caddy/Caddyfile.prod Refactored for explicit API/frontend routing, improved comments, and added header forwarding.
config/makefile/app.mk Split Caddy config variable into prod/local, updated validate-caddy target for both files.
caddy/readme.md Added "Debugging" section with header-forwarding example using header_down.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant Caddy (prod)
    participant Go API
    participant Vue Frontend

    Client->>Caddy (prod): HTTP request to /api/*
    Caddy (prod)->>Go API: Proxy request with headers (Host, Auth headers)
    Go API-->>Caddy (prod): API response
    Caddy (prod)-->>Client: API response

    Client->>Caddy (prod): HTTP request to /
    Caddy (prod)->>Vue Frontend: Proxy request
    Vue Frontend-->>Caddy (prod): Frontend response
    Caddy (prod)-->>Client: Frontend response
Loading

Estimated code review effort

2 (~15 minutes)

Poem

In the warren, configs split in two,
Local and prod—each with a view.
Headers hop along for debug delight,
Makefile checks keep things right.
With comments crisp and routes anew,
This bunny cheers the work you do!
🐇✨


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Summary of Changes

Hello @gocanto, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on enhancing the Caddy server's configuration by implementing explicit handler separation for API and frontend traffic, which streamlines routing and improves maintainability. It also includes updates to the build system to ensure proper validation of both production and local Caddy configurations, alongside minor documentation improvements.

Highlights

  • Caddy Configuration Restructuring: I've refactored caddy/Caddyfile.prod to introduce explicit handler separation. Requests to /api/* are now routed specifically to the Go API backend, while all other traffic is directed to the Vue frontend. This significantly improves the clarity and maintainability of the routing logic.
  • Caddyfile Maintenance and Documentation: I've made minor comment improvements in caddy/Caddyfile.local for better clarity. Additionally, a new caddy/reademe.md file has been added to house useful Caddy debugging snippets, keeping the main production Caddyfile cleaner.
  • Build System Updates for Caddyfiles: The config/makefile/app.mk has been updated to properly manage and validate both production (Caddyfile.prod) and local (Caddyfile.local) Caddy configurations. The validate-caddy target now ensures consistent formatting and validity across both environments.
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Actionable comments posted: 1

🧹 Nitpick comments (2)
caddy/reademe.md (2)

3-3: Fix heading level to follow markdown conventions.

The heading should be h2 (##) instead of h3 (###) to follow proper heading hierarchy after the main h1 title.

- ### Debugging Headers
+ ## Debugging Headers

4-8: Use proper syntax highlighting for Caddy configuration.

The code block uses HTML syntax highlighting, but these are Caddy directives. Consider using a more appropriate syntax highlighter.

- ```html
+ ```caddyfile
  header_down X-Debug-Username {http.request.header.X-API-Username}
  header_down X-Debug-Key {http.request.header.X-API-Key}
  header_down X-Debug-Signature {http.request.header.X-API-Signature}

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

**Configuration used: CodeRabbit UI**
**Review profile: CHILL**
**Plan: Pro**


<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between 2fa8755ac4f67d56a7ab4caafc9e172de231511e and c71a9faa236a87613ad4590431a879787db00749.

</details>

<details>
<summary>📒 Files selected for processing (4)</summary>

* `caddy/Caddyfile.local` (1 hunks)
* `caddy/Caddyfile.prod` (2 hunks)
* `caddy/reademe.md` (1 hunks)
* `config/makefile/app.mk` (2 hunks)

</details>

<details>
<summary>🪛 markdownlint-cli2 (0.17.2)</summary>

<details>
<summary>caddy/reademe.md</summary>

3-3: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3

(MD001, heading-increment)

</details>

</details>

<details>
<summary>🧰 Additional context used</summary>

<details>
<summary>🪛 markdownlint-cli2 (0.17.2)</summary>

<details>
<summary>caddy/reademe.md</summary>

3-3: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3

(MD001, heading-increment)

</details>

</details>

</details>

<details>
<summary>🔇 Additional comments (6)</summary><blockquote>

<details>
<summary>caddy/Caddyfile.local (1)</summary>

`1-21`: **LGTM! Improved documentation and formatting.**

The changes enhance the local Caddyfile with better comments explaining the Docker networking setup and clearer formatting. The functional behavior remains unchanged, which is appropriate for the local development environment.

</details>
<details>
<summary>config/makefile/app.mk (2)</summary>

`3-4`: **LGTM! Proper separation of configuration files.**

The introduction of separate variables for production and local Caddy configurations supports the PR's objective of handler separation and allows independent management of environment-specific configurations.

---

`58-61`: **LGTM! Comprehensive validation for both environments.**

The updated validate-caddy target properly formats and validates both production and local Caddyfiles, ensuring consistency across environments.

</details>
<details>
<summary>caddy/Caddyfile.prod (3)</summary>

`8-17`: **LGTM! Enhanced security headers with clear documentation.**

The security headers are well-chosen and properly documented. The comments clearly explain the purpose of each header, improving maintainability.

---

`28-45`: **LGTM! Well-implemented API routing with proper configuration.**

The API handler correctly:
- Uses `handle_path` to strip the `/api/` prefix before forwarding
- Preserves the original Host header
- Forwards authentication headers
- Includes reasonable transport timeouts

This implementation properly separates API traffic from frontend routing.

---

`47-53`: **Verify production Caddy reverse_proxy target**

We didn’t find any references to a service or container named `web_caddy_prod` in your Docker Compose or other YAML manifests. Please confirm that in your production environment you have a service (or container) named `web_caddy_prod` listening on port 80.

• File: caddy/Caddyfile.prod (lines 47–53)  

handle {
reverse_proxy web_caddy_prod:80
}

If the actual container/service name or port differs, please update this block to match your production configuration.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->

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Actionable comments posted: 1

🧹 Nitpick comments (1)
caddy/readme.md (1)

3-3: Fix heading-level increment to satisfy Markdown linting (MD001).

### Headers skips directly from H1 to H3. Change to H2 for proper hierarchy.

-### Headers
+## Headers
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between c71a9fa and 5b7cccc.

📒 Files selected for processing (1)
  • caddy/readme.md (1 hunks)
🪛 markdownlint-cli2 (0.17.2)
caddy/readme.md

3-3: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3

(MD001, heading-increment)

🧰 Additional context used
🪛 markdownlint-cli2 (0.17.2)
caddy/readme.md

3-3: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3

(MD001, heading-increment)

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Code Review

The pull request separates Caddy handlers for API and default routes, enhancing configuration clarity. It also updates comments in the Caddyfile to provide more context. The changes in app.mk ensure both production and local Caddyfiles are validated.

@gocanto gocanto merged commit 7c717f0 into main Jul 23, 2025
4 checks passed
@gocanto gocanto deleted the feature/split-caddy branch July 23, 2025 05:40
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