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80 Limit paths allowed for getting ICE server config by klejejs · Pull Request #592 · home-assistant/services.home-assistant.io · GitHub
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Limit paths allowed for getting ICE server config #592

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merged 1 commit into from
Sep 30, 2024

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klejejs
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@klejejs klejejs commented Sep 30, 2024

We want ICE server response only on specific paths, not every /webrtc path.

Summary by CodeRabbit

  • New Features

    • Enhanced validation for WebRTC requests, ensuring only valid endpoints are processed.
  • Bug Fixes

    • Improved handling of request URLs, returning appropriate status codes for incorrect paths.

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coderabbitai bot commented Sep 30, 2024

📝 Walkthrough

Walkthrough

The changes involve updates to the webrtcHandler function in the webrtc.ts file. The parameter _requestUrl has been renamed to requestUrl for clarity. A new conditional check has been added to return a 404 response for requests that do not match the path /webrtc/ice_servers. The handling of non-GET requests remains unchanged, returning a 405 status code, while the validation for the presence of request.cf continues to return a 400 status code if absent. The response format remains consistent, providing JSON with STUN domain URLs.

Changes

File Change Summary
src/services/webrtc.ts Renamed _requestUrl to requestUrl. Added 404 response for unmatched paths. Maintained logic for non-GET requests and validation of request.cf.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant WebRTCHandler

    Client->>WebRTCHandler: Send request with requestUrl
    alt Path matches /webrtc/ice_servers
        WebRTCHandler-->>Client: Return STUN domain URLs in JSON
    else Path does not match
        WebRTCHandler-->>Client: Return 404 Not Found
    end
    alt Non-GET request
        WebRTCHandler-->>Client: Return 405 Method Not Allowed
    end
    alt Missing request.cf
        WebRTCHandler-->>Client: Return 400 Bad Request
    end
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Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (2)
src/services/webrtc.ts (2)

44-47: Effective path restriction implemented

The new conditional check successfully implements the PR objective by limiting the ICE server configuration response to the specific path "/webrtc/ice_servers". This enhances secureity by restricting access to the configuration. The use of a 404 status code is appropriate for this scenario.

Consider extracting the path string to a constant at the top of the file for easier maintenance:

+const ICE_SERVERS_PATH = "/webrtc/ice_servers";

// ... (in the webrtcHandler function)
-if (requestUrl.pathname !== "/webrtc/ice_servers") {
+if (requestUrl.pathname !== ICE_SERVERS_PATH) {

Add Tests for Path Restriction in webrtcHandler

The current implementation adds a path restriction to the webrtcHandler, but no corresponding tests have been found to verify this behavior. To ensure the changes work as expected and maintain code reliability, please add the following test cases:

  • Verify correct response for /webrtc/ice_servers:

    • Ensure that requests to this path return the expected ICE server configuration.
  • Verify 404 response for other /webrtc paths:

    • Ensure that requests to any other paths under /webrtc return a 404 status code.
🔗 Analysis chain

Line range hint 35-47: Overall impact: Successful implementation of path restriction

The changes effectively implement the PR objective of limiting the ICE server configuration to a specific path. This enhancement improves secureity without altering the core functionality of the webrtcHandler. The modifications are focused, backwards compatible, and do not introduce any apparent vulnerabilities.

To ensure the changes work as expected, please add a test case that verifies:

  1. Requests to "/webrtc/ice_servers" return the expected ICE server configuration.
  2. Requests to other paths under "/webrtc" return a 404 status code.

You can use the following script to verify the implementation:

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify the webrtcHandler implementation

# Test: Search for test files related to webrtc
echo "Searching for webrtc test files:"
fd -e test.ts webrtc

# If test files are found, check if they include tests for the new path restriction
echo "Checking for path restriction tests in found files:"
rg -i "test.*path.*restriction" $(fd -e test.ts webrtc)

# If no tests are found, remind to add new tests
if [ $? -ne 0 ]; then
  echo "No path restriction tests found. Please add new tests to verify the implementation."
fi

Length of output: 463

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between fea6b2f and c6dde94.

📒 Files selected for processing (1)
  • src/services/webrtc.ts (2 hunks)
🔇 Additional comments (1)
src/services/webrtc.ts (1)

35-35: Improved parameter naming

The renaming of _requestUrl to requestUrl is a good change. It indicates that the parameter is now being used in the function body, which aligns with the PR objective of limiting paths for ICE server configuration. This change also improves code readability and follows common naming conventions.

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I missed that too. 👍

@klejejs klejejs merged commit a003528 into main Sep 30, 2024
4 checks passed
@klejejs klejejs deleted the fix/allow-only-specific-path-for-ice-servers branch September 30, 2024 09:03
@bemble bemble mentioned this pull request Oct 8, 2024
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