Sourced from com.squareup.okhttp3:okhttp's changelog.

Version 5.1.0

2025-07-07

• New: Response.peekTrailers(). When we changed Response.trailers() to block instead of throwing in 5.0.0, we inadvertently removed the ability for callers to peek the trailers (by catching the IllegalStateException if they weren't available). This new API restores that capability.

• Fix: Don't crash on trailers() if the response doesn't have a body. We broke [Retrofit] users who read the trailers on the raw() OkHttp response, after its body was decoded.

• d2dd180 Prepare for release 5.1.0.
• 61a8735 New Response.peekTrailers() API (#8921)
• 6684401 Update dependency gradle to v8.14.3 (#8915)
• 7adb2b6 Update junit-framework monorepo (#8914)
• e41ff18 Link to new mockwebserver artifacts (#8911)
• 0ff8751 Remove Graal init tracing (#8909)
• b9a2560 Run graal on master (#8907)
• 8339524 Remove ExperimentalOkHttpApi references (#8908)
• ce29ef6 Fix graal tests (#8906)
• 8579689 Don't force a response body read on all trailers (#8904)
• Additional commits viewable in compare view

Sourced from com.squareup.okhttp3:okhttp-jvm's changelog.

Version 5.1.0

2025-07-07

• New: Response.peekTrailers(). When we changed Response.trailers() to block instead of throwing in 5.0.0, we inadvertently removed the ability for callers to peek the trailers (by catching the IllegalStateException if they weren't available). This new API restores that capability.

• Fix: Don't crash on trailers() if the response doesn't have a body. We broke [Retrofit] users who read the trailers on the raw() OkHttp response, after its body was decoded.

• d2dd180 Prepare for release 5.1.0.
• 61a8735 New Response.peekTrailers() API (#8921)
• 6684401 Update dependency gradle to v8.14.3 (#8915)
• 7adb2b6 Update junit-framework monorepo (#8914)
• e41ff18 Link to new mockwebserver artifacts (#8911)
• 0ff8751 Remove Graal init tracing (#8909)
• b9a2560 Run graal on master (#8907)
• 8339524 Remove ExperimentalOkHttpApi references (#8908)
• ce29ef6 Fix graal tests (#8906)
• 8579689 Don't force a response body read on all trailers (#8904)
• Additional commits viewable in compare view

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