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Change Log

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:

api('com.squareup.okio:okio-multiplatform:2.3.0')

You’ll also need to enable 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 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 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.