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Change Log
==========
## Version 2.9.0
_2020-10-04_
* Fix: Don't corrupt the `Buffer` when writing a slice of a segmented `ByteString`. We had a severe
bug where `ByteString` instances created with `snapshot()` and `readByteString()` incorrectly
adjusted the buffer's size by their full length, not the length of the slice. This would have
caused buffer reads to crash! We do not believe data was silently corrupted.
* New: `CipherSink` and `CipherSource`. Use these with `javax.crypto.Cipher` to encrypt and decrypt
streams of data. This is a low-level encryption API; most applications should use higher-level
APIs like TLS when available.
* New: Promote hash functions `md5`, `sha1()`, `sha512()`, and `sha256()` to common Kotlin. These
are currently only available on `ByteString`, multiplatform support for `HashingSource`,
`HashingSink`, and `Buffer` should come in a follow-up release. We wrote and optimized our own
implementations of these hash functions in Kotlin. On JVM and Android platforms Okio still uses
the platform's built-in hash functions.
* New: Support OSGi metadata.
* Upgrade: [Kotlin 1.4.10][kotlin_1_4_10].
## Version 2.8.0
_2020-08-17_
* New: Upgrade to Kotlin 1.4.0.
## Version 2.7.0
_2020-07-07_
* New: `Pipe.cancel()` causes in-progress and future reads and writes on the pipe to immediately
fail with an `IOException`. The streams may still be canceled normally.
* New: Enlarge Okio's internal segment pool from a fixed 64 KiB total to 64 KiB per processor. For
example, on an Intel i9 8-core/16-thread machine the segment pool now uses up to 1 MiB of memory.
* New: Migrate from `synchronized` to lock-free when accessing the segment pool. Combined with the
change above we saw throughput increase 3x on a synthetic benchmark designed to create
contention.
## Version 2.6.0
_2020-04-22_
* New: `InflaterSource.readOrInflate()` is like `InflaterSource.read()`, except it will return 0 if
consuming deflated bytes from the underlying stream did not produce new inflated bytes.
## Version 2.5.0
_2020-03-20_
* New: Upgrade to Kotlin 1.3.70.
## Version 2.4.3
_2019-12-20_
* New: Upgrade to Kotlin 1.3.61.
## Version 2.4.2
_2019-12-11_
* Fix: Don't crash when an `InputStream` source is exhausted exactly at a buffer segment boundary.
We had a bug where a sequence of reads could violate a buffer's invariants, and this could result
in a crash when subsequent reads encountered an unexpected empty segment.
## Version 1.17.5
_2019-12-11_
* Fix: Don't crash when an `InputStream` source is exhausted exactly at a buffer segment boundary.
We had a bug where a sequence of reads could violate a buffer's invariants, and this could result
in a crash when subsequent reads encountered an unexpected empty segment.
### Version 2.4.1
_2019-10-04_
* Fix: Don't cache hash code and UTF-8 string in `ByteString` on Kotlin/Native which prevented freezing.
### Version 2.4.0
_2019-08-26_
* New: Upgrade to Kotlin 1.3.50.
### Version 2.3.0
_2019-07-29_
**This release changes our build from Kotlin-JVM to Kotlin-multiplatform (which includes JVM).**
Both native and JavaScript platforms are unstable preview releases and subject to
backwards-incompatible changes in forthcoming releases.
To try Okio in a multiplatform project use this Maven coordinate:
```kotlin
api('com.squareup.okio:okio-multiplatform:2.3.0')
```
You’ll also need to [enable Gradle metadata][gradle_metadata] in your project's settings. The
artifact name for JVM projects has not changed.
* New: Upgrade to Kotlin 1.3.40.
* Fix: Use Gradle `api` instead of `implementation` for the kotlin-stdlib dependency.
* Fix: Don't block unless strictly necessary in `BufferedSource.peek()`.
## Version 1.17.4
_2019-04-29_
* Fix: Don't block unless strictly necessary in `BufferedSource.peek()`.
## Version 2.2.2
_2019-01-28_
* Fix: Make `Pipe.fold()` close the underlying sink when necessary.
## Version 1.17.3
_2019-01-28_
* Fix: Make `Pipe.fold()` close the underlying sink when necessary.
## Version 1.17.2
_2019-01-17_
* Fix: Make `Pipe.fold()` flush the underlying sink.
## Version 2.2.1
_2019-01-17_
* Fix: Make `Pipe.fold()` flush the underlying sink.
## Version 2.2.0
_2019-01-16_
* New: `Throttler` limits sources and sinks to a maximum desired throughput. Multiple sources and
sinks can be attached to the same throttler and their combined throughput will not exceed the
desired throughput. Multiple throttlers can also be used on the same source or sink and they will
all be honored.
* New: `Pipe.fold()` replaces the actively-readable `Source` with a passively-writable `Sink`.
This can be used to forward one sink to a target that is initially undetermined.
* New: Optimize performance of ByteStrings created with `Buffer.snapshot()`.
## Version 1.17.1
_2019-01-16_
* Fix: Make the newly-backported `Pipe.fold()` public.
## Version 1.17.0
_2019-01-16_
* New: Backport `Pipe.fold()` to Okio 1.x.
## Version 1.16.0
_2018-10-08_
* New: Backport `BufferedSource.peek()` and `BufferedSource.getBuffer()` to Okio 1.x.
* Fix: Enforce timeouts when closing `AsyncTimeout` sources.
## Version 2.1.0
_2018-09-22_
* New: `BufferedSource.peek()` returns another `BufferedSource` that reads ahead on the current
source. Use this to process the same data multiple times.
* New: Deprecate `BufferedSource.buffer()`, replacing it with either `BufferedSource.getBuffer()`
(in Java) or `BufferedSource.buffer` (in Kotlin). We have done likewise for `BufferedSink`.
When we introduced the new extension method `Source.buffer()` in Okio 2.0 we inadvertently
collided with an existing method. This fixes that.
* New: Improve performance of `Buffer.writeUtf8()`. This comes alongside initial implementation of
UTF-8 encoding and decoding in JavaScript which [uses XOR masks][xor_utf8] for great performance.
## Version 2.0.0
_2018-08-27_
This release commits to a stable 2.0 API. Read the 2.0.0-RC1 changes for advice on upgrading from
1.x to 2.x.
We've also added APIs to ease migration for Kotlin users. They use Kotlin's `@Deprecated` annotation
to help you change call sites from the 1.x style to the 2.x style.
## Version 2.0.0-RC1
_2018-07-26_
Okio 2 is a major release that upgrades the library's implementation language from Java to Kotlin.
Okio 2.x is **binary-compatible** with Okio 1.x and does not change any behavior. Classes and .jar
files compiled against 1.x can be used with 2.x without recompiling.
Okio 2.x is **.java source compatible** with Okio 1.x in all but one corner case. In Okio 1.x
`Buffer` would throw an unchecked `IllegalStateException` when attempting to read more bytes than
available. Okio 2.x now throws a checked `EOFException` in this case. This is now consistent with
the behavior of its `BufferedSource` interface. Java callers that don't already catch `IOException`
will now need to.
Okio 2.x is **.kt source-incompatible** with Okio 1.x. This release adopts Kotlin idioms where they
are available.
| Java | Kotlin | Idiom |
| :--------------------------------------- | :---------------------------------- | :----------------- |
| Buffer.getByte() | operator fun Buffer.get() | operator function |
| Buffer.size() | val Buffer.size | val |
| ByteString.decodeBase64(String) | fun String.decodeBase64() | extension function |
| ByteString.decodeHex(String) | fun String.decodeHex() | extension function |
| ByteString.encodeString(String, Charset) | fun String.encode(Charset) | extension function |
| ByteString.encodeUtf8(String) | fun String.encodeUtf8() | extension function |
| ByteString.getByte() | operator fun ByteString.get() | operator function |
| ByteString.of(ByteBuffer) | fun ByteBuffer.toByteString() | extension function |
| ByteString.of(byte[], int, int) | fun ByteArray.toByteString() | extension function |
| ByteString.read(InputStream, int) | fun InputStream.readByteString(Int) | extension function |
| ByteString.size() | val ByteString.size | val |
| DeflaterSink(Sink) | fun Sink.deflater() | extension function |
| ForwardingSink.delegate() | val ForwardingSink.delegate | val |
| ForwardingSource.delegate() | val ForwardingSource.delegate | val |
| GzipSink(Sink, Deflater) | fun Sink.gzip() | extension function |
| GzipSink.deflater() | val GzipSink.deflater | val |
| GzipSource(Source) | fun Source.gzip() | extension function |
| HashingSink.hash() | val HashingSink.hash | val |
| HashingSource.hash() | val HashingSource.hash | val |
| InflaterSink(Source) | fun Source.inflater() | extension function |
| Okio.appendingSink(File) | fun File.appendingSink() | extension function |
| Okio.blackhole() | fun blackholeSink() | top level function |
| Okio.buffer(Sink) | fun Sink.buffer() | extension function |
| Okio.buffer(Source) | fun Source.buffer() | extension function |
| Okio.sink(File) | fun File.sink() | extension function |
| Okio.sink(OutputStream) | fun OutputStream.sink() | extension function |
| Okio.sink(Path) | fun Path.sink() | extension function |
| Okio.sink(Socket) | fun Socket.sink() | extension function |
| Okio.source(File) | fun File.source() | extension function |
| Okio.source(InputStream) | fun InputStream.source() | extension function |
| Okio.source(Path) | fun Path.source() | extension function |
| Okio.source(Socket) | fun Socket.source() | extension function |
| Pipe.sink() | val Pipe.sink | val |
| Pipe.source() | val Pipe.source | val |
| Utf8.size(String) | fun String.utf8Size() | extension function |
Okio 2.x has **similar performance** to Okio 1.x. We benchmarked both versions to find potential
performance regressions. We found one regression and fixed it: we were using `==` instead of `===`.
Other changes in this release:
* New: Add a dependency on kotlin-stdlib. Okio's transitive dependencies grow from none in 1.x to
three in 2.x. These are kotlin-stdlib (939 KiB), kotlin-stdlib-common (104 KiB), and JetBrains'
annotations (17 KiB).
* New: Change Okio to build with Gradle instead of Maven.
## Version 1.15.0
_2018-07-18_
* New: Trie-based `Buffer.select()`. This improves performance when selecting
among large lists of options.
* Fix: Retain interrupted state when throwing `InterruptedIOException`.
## Version 1.14.0
_2018-02-11_
* New: `Buffer.UnsafeCursor` provides direct access to Okio internals. This API
is like Okio's version of Java reflection: it's a very powerful API that can
be used for great things and dangerous things alike. The documentation is
extensive and anyone using it should review it carefully before proceeding!
* New: Change `BufferedSource` to implement `java.nio.ReadableByteChannel` and
`BufferedSink` to implement `java.nio.WritableByteChannel`. Now it's a little
easier to interop between Okio and NIO.
* New: Automatic module name of `okio` for use with the Java Platform Module
System.
* New: Optimize `Buffer.getByte()` to search backwards when doing so will be
more efficient.
* Fix: Honor the requested byte count in `InflaterSource`. Previously this
class could return more bytes than requested.
* Fix: Improve a performance bug in `AsyncTimeout.sink().write()`.
## Version 1.13.0
_2017-05-12_
* **Okio now uses `@Nullable` to annotate all possibly-null values.** We've
added a compile-time dependency on the JSR 305 annotations. This is a
[provided][maven_provided] dependency and does not need to be included in
your build configuration, `.jar` file, or `.apk`. We use
`@ParametersAreNonnullByDefault` and all parameters and return types are
never null unless explicitly annotated `@Nullable`.
* **Warning: this release is source-incompatible for Kotlin users.**
Nullability was previously ambiguous and lenient but now the compiler will
enforce strict null checks.
## Version 1.12.0
_2017-04-11_
* **Fix: Change Pipe's sink.flush() to not block.** Previously closing a pipe's
sink would block until the source had been exhausted. In practice this
blocked the caller for no benefit.
* **Fix: Change `writeUtf8CodePoint()` to emit `?` for partial surrogates.**
The previous behavior was inconsistent: given a malformed string with a
partial surrogate, `writeUtf8()` emitted `?` but `writeUtf8CodePoint()` threw
an `IllegalArgumentException`. Most applications will never encounter partial
surrogates, but for those that do this behavior was unexpected.
* New: Allow length of `readUtf8LineStrict()` to be limited.
* New: `Utf8.size()` method to get the number of bytes required to encode a
string as UTF-8. This may be useful for length-prefixed encodings.
* New: SHA-512 hash and HMAC APIs.
## Version 1.11.0
_2016-10-11_
* **Fix: The four-argument overload of `Buffer.writeString()` had a major bug
where it didn't respect offsets if the specified charset was UTF-8.** This
was because our short-circuit optimization omitted necessary offset
parameters.
* New: HMAC support in `HashingSource`, `HashingSink`, `ByteString`, and
`Buffer`. This makes it easy to create a keyed-hash message authentication
code (HMAC) wherever your data is. Unlike the other hashes, HMAC uses a
`ByteString` secret key for authentication.
* New: `ByteString.of(ByteBuffer)` makes it easier to mix NIO with Okio.
## Version 1.10.0
_2016-08-28_
* Fix: Support reading files larger than 2 GiB with `GzipSource`. Previously
attempting to decompress such files would fail due to an overflow when
validating the total length.
* Fix: Exit the watchdog thread after being idle for 60 seconds. This should
make it possible for class unloaders to fully unload Okio.
* New: `Okio.blackhole()` returns a sink where all bytes written are discarded.
This is Okio's equivalent of `/dev/null`.
* New: Encode a string with any charset using `ByteString.encodeString()` and
decode strings in any charset using `ByteString.string()`. Most applications
should prefer `ByteString.encodeUtf8()` and `ByteString.utf8()` unless it's
necessary to support a legacy charset.
* New: `GzipSink.deflater()` makes it possible to configure the compression
level.
## Version 1.9.0
_2016-07-01_
* New: `Pipe` makes it easy to connect a producer thread to a consumer thread.
Reads block until data is available to read. Writes block if the pipe's is
full. Both sources and sinks support timeouts.
* New: `BufferedSource.rangeEquals()` makes it easy to compare a range in a
stream to an expected value. This does the right thing: it blocks to load
the data required return a definitive result. But it won't block
unnecessarily.
* New: `Timeout.waitUntilNotified()` makes it possible to use nice timeout
abstractions on Java's built-in wait/notify primitives.
* Fix: Don't return incorrect results when `HashingSource` does large reads.
There was a bug where it wasn't traversing through the segments of the buffer
being hashed. This means that `HashingSource` was returning incorrect answers
for any writes that spanned multiple segment boundaries.
## Version 1.8.0
_2016-05-02_
* New: `BufferedSource.select(Options)` API for reading one of a set of
expected values.
* New: Make `ByteString.toString()` and `Buffer.toString()` friendlier.
These methods return text if the byte string is valid UTF-8.
* New: APIs to match byte strings: `indexOf()`, `startsWith()`, and
`endsWith()`.
## Version 1.7.0
_2016-04-10_
* New: Change the segment size to 8 KiB. This has been reported to dramatically
improve performance in some applications.
* New: `md5()`, `sha1()`, and `sha256()` methods on `Buffer`. Also add a
`sha1()` method on `ByteString` for symmetry.
* New: `HashingSource` and `HashingSink`. These classes are Okio’s equivalent
to the JDK’s `DigestInputStream` and `DigestOutputStream`. They offer
convenient `md5()`, `sha1()`, and `sha256()` factory methods to avoid an
impossible `NoSuchAlgorithmException`.
* New: `ByteString.asByteBuffer()`.
* Fix: Limit snapshot byte strings to requested size.
* Fix: Change write timeouts to have a maximum write size. Previously large
writes could easly suffer timeouts because the entire write was subject to a
single timeout.
* Fix: Recover from EBADF failures, which could be triggered by asynchronously
closing a stream on older versions of Android.
* Fix: Don't share segments if doing so only saves a small copy. This should
improve performance for all applications.
* Fix: Optimize `BufferedSource.indexOfElement()` and `indexOf(ByteString)`.
Previously this method had a bug that caused it to be very slow on large
buffers.
## Version 1.6.0
_2015-08-25_
* New: `BufferedSource.indexOf(ByteString)` searches a source for the next
occurrence of a byte string.
* Fix: Recover from unexpected `AssertionError` thrown on Android 4.2.2 and
earlier when asynchronously closing a socket.
## Version 1.5.0
_2015-06-19_
* Sockets streams now throw `SocketTimeoutException`. This builds on new
extension point in `AsyncTimeout` to customize the exception when a timeout
occurs.
* New: `ByteString` now implements `Comparable`. The comparison sorts bytes as
unsigned: {@code ff} sorts after {@code 00}.
## Version 1.4.0
_2015-05-16_
* **Timeout exception changed.** Previously `Timeout.throwIfReached()` would
throw `InterruptedIOException` on thread interruption, and `IOException` if
the deadline was reached. Now it throws `InterruptedIOException` in both
cases.
* Fix: throw `EOFException` when attempting to read digits from an empty
source. Previously this would crash with an unchecked exception.
* New: APIs to read and write UTF-8 code points without allocating strings.
* New: `BufferedSink` can now write substrings directly, potentially saving an
allocation for some callers.
* New: `ForwardingTimeout` class.
## Version 1.3.0
_2015-03-16_
* New: Read and write signed decimal and unsigned hexadecimal values in
`BufferedSource` and `BufferedSink`. Unlike the alternatives, these methods
don’t do any memory allocations!
* New: Segment sharing. This improves the runtime of operations like
`Buffer.clone()` and `Buffer.copyTo()` by sharing underlying segments between
buffers.
* New: `Buffer.snapshot()` returns an immutable snapshot of a buffer as a
`ByteString`. This builds on segment sharing so that snapshots are shallow,
immutable copies.
* New: `ByteString.rangeEquals()`.
* New: `ByteString.md5()` and `ByteString.sha256()`.
* New: `ByteString.base64Url()` returns URL-safe Base64. The existing
decoding method has been extended to support URL-safe Base64 input.
* New: `ByteString.substring()` returns a prefix, infix, or suffix.
* New: `Sink` now implements `java.io.Flushable`.
* Fix: `Buffer.write(Source, long)` now always writes fully. The previous
behavior would return as soon as any data had been written; this was
inconsistent with all other _write()_ methods in the API.
* Fix: don't leak empty segments in DeflaterSink and InflaterSource. (This was
unlikely to cause problems in practice.)
## Version 1.2.0
_2014-12-30_
* Fix: `Okio.buffer()` _always_ buffers for better predictability.
* Fix: Provide context when `readUtf8LineStrict()` throws.
* Fix: Buffers do not call through the `Source` on zero-byte writes.
## Version 1.1.0
_2014-12-11_
* Do UTF-8 encoding natively for a performance increase, particularly on Android.
* New APIs: `BufferedSink.emit()`, `BufferedSource.request()` and `BufferedSink.indexOfElement()`.
* Fixed a performance bug in `Buffer.indexOf()`
## Version 1.0.1
_2014-08-08_
* Added `read(byte[])`, `read(byte[], offset, byteCount)`, and
`void readFully(byte[])` to `BufferedSource`.
* Refined declared checked exceptions on `Buffer` methods.
## Version 1.0.0
_2014-05-23_
* Bumped release version. No other changes!
## Version 0.9.0
_2014-05-03_
* Use 0 as a sentinel for no timeout.
* Make AsyncTimeout public.
* Remove checked exception from Buffer.readByteArray.
## Version 0.8.0
_2014-04-24_
* Eagerly verify preconditions on public APIs.
* Quick return on Buffer instance equivalence.
* Add delegate types for Sink and Source.
* Small changes to the way deadlines are managed.
* Add append variant of Okio.sink for File.
* Methods to exhaust BufferedSource to byte[] and ByteString.
## Version 0.7.0
_2014-04-18_
* Don't use getters in timeout.
* Use the watchdog to interrupt sockets that have reached deadlines.
* Add java.io and java.nio file source/sink helpers.
## Version 0.6.1
_2014-04-17_
* Methods to read a buffered source fully in UTF-8 or supplied charset.
* API to read a byte[] directly.
* New methods to move all data from a source to a sink.
* Fix a bug on input stream exhaustion.
## Version 0.6.0
_2014-04-15_
* Make ByteString serializable.
* New API: `ByteString.of(byte[] data, int offset, int byteCount)`
* New API: stream-based copy, write, and read helpers.
## Version 0.5.0
_2014-04-08_
* Initial public release.
* Imported from OkHttp.
[gradle_metadata]: https://blog.gradle.org/gradle-metadata-1.0
[kotlin_1_4_10]: https://github.com/JetBrains/kotlin/releases/tag/v1.4.10
[maven_provided]: https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html
[xor_utf8]: https://github.com/square/okio/blob/bbb29c459e5ccf0f286e0b17ccdcacd7ac4bc2a9/okio/src/main/kotlin/okio/Utf8.kt#L302
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