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OkHttp v5.0.0-alpha.7 Release Notes

  • 2022-04-26

    🚀 This release introduces new Kotlin-friendly APIs. When we migrated OkHttp from Java to Kotlin in 👍 OkHttp 4.0, we kept our Java-first APIs. With 5.0 we're continuing to support Java and adding ➕ additional improvements for Kotlin users. In this alpha we're excited to skip-the-builder for 🚚 requests and remove a common source of non-null assertions (!!) on the response body.

    🚀 The alpha releases in the 5.0.0 series have production-quality code and an unstable API. We expect 🚀 to make changes to the APIs introduced in 5.0.0-alpha.X. These releases are safe for production use 🚦 and 'alpha' strictly signals that we're still experimenting with some new APIs. If you're eager for ⬆️ the fixes or features below, please upgrade.

    • New: Named and default parameters constructor for Request:

      val request = Request(
  url = "https://cash.app/".toHttpUrl(),
)

    • New: Response.body is now non-null. This was generally the case in OkHttp 4.x, but the Kotlin type declaration was nullable to support rare cases like the body on Response.cacheResponse, Response.networkResponse, and Response.priorResponse. In such cases the body is now non-null, but attempts to read its content will fail.

    • New: Kotlin-specific APIs for request tags. Kotlin language users can lookup tags with a type parameter only, like request.tag<MyTagClass>().

    • New: MockWebServer has improved support for HTTP/1xx responses. Once you've migrated to the new mockwebserver3 package, there's a new field, MockResponse.informationalResponses.

    • Fix: Don't interpret trailers as headers after an HTTP/100 response. This was a bug only when the HTTP response body itself is empty.

    • Fix: Don't crash when a fast fallback call has both a deferred connection and a held connection.

    • Fix: OkHttpClient no longer implements Cloneable. It never should have; the class is immutable. This is left over from OkHttp 2.x (!) when that class was mutable. We're using the 5.x upgrade as an opportunity to remove very obsolete APIs.

    • Fix: Recover gracefully when Android's NativeCrypto crashes with "ssl == null". This occurs when OkHttp retrieves ALPN state on a closed connection.

    • Upgrade: [Kotlin 1.6.21][kotlin_1_6_21].

    • Upgrade: [Okio 3.1.0][okio_3_1_0].