Is request.allHttpHeaders thread safe?

Generated on 8/2/2024

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The request.allHttpHeaders is not thread-safe. Accessing shared mutable state, such as HTTP headers, from multiple threads can lead to data races, which may cause crashes or unpredictable behavior.

In Swift, data race safety is a primary goal, and Swift 6 achieves this by verifying data race safety at compile time. To ensure thread safety, you should use mechanisms like actors, which serialize access to their state, ensuring that only one task can access the state at a time.

For more information on data race safety and concurrency in Swift, you can refer to the session A Swift Tour: Explore Swift’s features and design (21:38).

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