handle empty getBackendUrl

[adhami3310]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

✅ 8 untouched benchmarks

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_{Comparing handle-empty-getBackendUrl (b2c87a2) with main (a52d240)}

[greptile-apps]

Greptile Summary

This PR adds a defensive null/undefined check in getBackendURL() to prevent errors when the function is called without a valid URL string.

Changes:

• Added condition to default url_str to env.PING when it's null or undefined
• Uses the ?? undefined === undefined pattern consistently with other checks in the codebase (line 212)

Issues Found:

• The current check won't catch empty strings, which would still cause new URL("") to throw an error

Confidence Score: 3/5

• Safe to merge but contains a logical gap that should be addressed
• The change correctly handles null and undefined cases but misses empty strings, which would still cause runtime errors. The fix is straightforward but important for complete error handling
• reflex/.templates/web/utils/state.js - verify empty string handling

Important Files Changed

Filename	Overview
reflex/.templates/web/utils/state.js	Added defensive check to handle null/undefined url_str parameter by defaulting to env.PING

Sequence Diagram

sequenceDiagram
    participant Caller
    participant getBackendURL
    participant URL Constructor
    participant env

    Caller->>getBackendURL: url_str (null/undefined/empty/valid)
    
    alt url_str is null or undefined
        getBackendURL->>getBackendURL: Check: url_str ?? undefined === undefined
        getBackendURL->>env: Get env.PING
        env-->>getBackendURL: Returns default URL
        getBackendURL->>getBackendURL: url_str = env.PING
    else url_str is empty string
        Note over getBackendURL: ⚠️ Empty string bypasses check
    else url_str is valid
        Note over getBackendURL: Uses provided value
    end
    
    getBackendURL->>URL Constructor: new URL(url_str)
    
    alt url_str is valid URL
        URL Constructor-->>getBackendURL: URL object
        getBackendURL->>getBackendURL: Apply hostname/protocol transformations
        getBackendURL-->>Caller: Modified URL object
    else url_str is invalid (e.g., empty string)
        URL Constructor--xgetBackendURL: TypeError
        Note over getBackendURL,Caller: Runtime error
    end

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[greptile-apps]

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