Change Log
==========
## Version 2.7.5
_2016-02-25_
* Fix: Change the certificate pinner to always build full chains. This
prevents a potential crash when using certificate pinning with the Google
Play Services security provider.
## Version 2.7.4
_2016-02-07_
* Fix: Don't crash when finding the trust manager if the Play Services (GMS)
security provider is installed.
* Fix: The previous release introduced a performance regression on Android,
caused by looking up CA certificates. This is now fixed.
## Version 2.7.3
_2016-02-06_
* Fix: Permit the trusted CA root to be pinned by `CertificatePinner`.
## Version 2.7.2
_2016-01-07_
* Fix: Don't eagerly release stream allocations on cache hits. We might still
need them to handle redirects.
## Version 2.7.1
_2016-01-01_
* Fix: Don't do a health check on newly-created connections. This is
unnecessary work that could put the client in an inconsistent state if the
health check fails.
## Version 2.7.0
_2015-12-12_
* **Rewritten connection management.** Previously OkHttp's connection pool
managed both idle and active connections for HTTP/2, but only idle
connections for HTTP/1.x. Wth this update the connection pool manages both
idle and active connections for everything. OkHttp now detects and warns on
connections that were allocated but never released, and will enforce HTTP/2
stream limits. This update also fixes `Call.cancel()` to not do I/O on the
calling thread.
* Fix: Don't log gzipped data in the logging interceptor.
* Fix: Don't resolve DNS addresses when connecting through a SOCKS proxy.
* Fix: Drop the synthetic `OkHttp-Selected-Protocol` response header.
* Fix: Support 204 and 205 'No Content' replies in the logging interceptor.
* New: Add `Call.isExecuted()`.
## Version 2.6.0
_2015-11-22_
* **New Logging Interceptor.** The `logging-interceptor` subproject offers
simple request and response logging. It may be configured to log headers and
bodies for debugging. It requires this Maven dependency:
```xml
<dependency>
<groupId>com.squareup.okhttp</groupId>
<artifactId>logging-interceptor</artifactId>
<version>2.6.0</version>
</dependency>
```
Configure basic logging like this:
```java
HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BASIC);
client.networkInterceptors().add(loggingInterceptor);
```
**Warning:** Avoid `Level.HEADERS` and `Level.BODY` in production because
they could leak passwords and other authentication credentials to insecure
logs.
* **WebSocket API now uses `RequestBody` and `ResponseBody` for messages.**
This is a backwards-incompatible API change.
* **The DNS service is now pluggable.** In some situations this may be useful
to manually prioritize specific IP addresses.
* Fix: Don't throw when converting an `HttpUrl` to a `java.net.URI`.
Previously URLs with special characters like `|` and `[` would break when
subjected to URI’s overly-strict validation.
* Fix: Don't re-encode `+` as `%20` in encoded URL query strings. OkHttp
prefers `%20` when doing its own encoding, but will retain `+` when that is
provided.
* Fix: Enforce that callers call `WebSocket.close()` on IO errors. Error
handling in WebSockets is significantly improved.
* Fix: Don't use SPDY/3 style header concatenation for HTTP/2 request headers.
This could have corrupted requests where multiple headers had the same name,
as in cookies.
* Fix: Reject bad characters in the URL hostname. Previously characters like
`\0` would cause a late crash when building the request.
* Fix: Allow interceptors to change the request method.
* Fix: Don’t use the request's `User-Agent` or `Proxy-Authorization` when
connecting to an HTTPS server via an HTTP tunnel. The `Proxy-Authorization`
header was being leaked to the origin server.
* Fix: Digits may be used in a URL scheme.
* Fix: Improve connection timeout recovery.
* Fix: Recover from `getsockname` crashes impacting Android releases prior to
4.2.2.
* Fix: Drop partial support for HTTP/1.0. Previously OkHttp would send
`HTTP/1.0` on connections after seeing a response with `HTTP/1.0`. The fixed
behavior is consistent with Firefox and Chrome.
* Fix: Allow a body in `OPTIONS` requests.
* Fix: Don't percent-encode non-ASCII characters in URL fragments.
* Fix: Handle null fragments.
* Fix: Don’t crash on interceptors that throw `IOException` before a
connection is attempted.
* New: Support [WebDAV][webdav] HTTP methods.
* New: Buffer WebSocket frames for better performance.
* New: Drop support for `TLS_DHE_DSS_WITH_AES_128_CBC_SHA`, our only remaining
DSS cipher suite. This is consistent with Firefox and Chrome which have also
dropped these cipher suite.
## Version 2.5.0
_2015-08-25_
* **Timeouts now default to 10 seconds.** Previously we defaulted to never
timing out, and that was a lousy policy. If establishing a connection,
reading the next byte from a connection, or writing the next byte to a
connection takes more than 10 seconds to complete, you’ll need to adjust
the timeouts manually.
* **OkHttp now rejects request headers that contain invalid characters.** This
includes potential security problems (newline characters) as well as simple
non-ASCII characters (including international characters and emoji).
* **Call canceling is more reliable.** We had a bug where a socket being
connected wasn't being closed when the application used `Call.cancel()`.
* **Changing a HttpUrl’s scheme now tracks the default port.** We had a bug
where changing a URL from `http` to `https` would leave it on port 80.
* **Okio has been updated to 1.6.0.**
```xml
<dependency>
<groupId>com.squareup.okio</groupId>
<artifactId>okio</artifactId>
<version>1.6.0</version>
</dependency>
```
* New: `Cache.initialize()`. Call this on a background thread to eagerly
initialize the response cache.
* New: Fold `MockWebServerRule` into `MockWebServer`. This makes it easier to
write JUnit tests with `MockWebServer`. The `MockWebServer` library now
depends on JUnit, though it continues to work with all testing frameworks.
* Fix: `FormEncodingBuilder` is now consistent with browsers in which
characters it escapes. Previously we weren’t percent-encoding commas,
parens, and other characters.
* Fix: Relax `FormEncodingBuilder` to support building empty forms.
* Fix: Timeouts throw `SocketTimeoutException`, not `InterruptedIOException`.
* Fix: Change `MockWebServer` to use the same logic as OkHttp when determining
whether an HTTP request permits a body.
* Fix: `HttpUrl` now uses the canonical form for IPv6 addresses.
* Fix: Use `HttpUrl` internally.
* Fix: Recover from Android 4.2.2 EBADF crashes.
* Fix: Don't crash with an `IllegalStateException` if an HTTP/2 or SPDY
write fails, leaving the connection in an inconsistent state.
* Fix: Make sure the default user agent is ASCII.
## Version 2.4.0
_2015-05-22_
* **Forbid response bodies on HTTP 204 and 205 responses.** Webservers that
return such malformed responses will now trigger a `ProtocolException` in
the client.
* **WebSocketListener has incompatible changes.** The `onOpen()` method is now
called on the reader thread, so implementations must return before further
websocket messages will be delivered. The `onFailure()` method now includes
an HTTP response if one was returned.
## Version 2.4.0-RC1
_2015-05-16_
* **New HttpUrl API.** It's like `java.net.URL` but good. Note that
`Request.Builder.url()` now throws `IllegalArgumentException` on malformed
URLs. (Previous releases would throw a `MalformedURLException` when calling
a malformed URL.)
* **We've improved connect failure recovery.** We now differentiate between
setup, connecting, and connected and implement appropriate recovery rules
for each. This changes `Address` to no longer use `ConnectionSpec`. (This is
an incompatible API change).
* **`FormEncodingBuilder` now uses `%20` instead of `+` for encoded spaces.**
Both are permitted-by-spec, but `%20` requires fewer special cases.
* **Okio has been updated to 1.4.0.**
```xml
<dependency>
<groupId>com.squareup.okio</groupId>
<artifactId>okio</artifactId>
<version>1.4.0</version>
</dependency>
```
* **`Request.Builder` no longer accepts null if a request body is required.**
Passing null will now fail for request methods that require a body. Instead
use an empty body such as this one:
```java
RequestBody.create(null, new byte[0]);
```
* **`CertificatePinner` now supports wildcard hostnames.** As always with
certificate pinning, you must be very careful to avoid [bricking][brick]
your app. You'll need to pin both the top-level domain and the `*.` domain
for full coverage.
```java
client.setCertificatePinner(new CertificatePinner.Builder()
.add("publicobject.com", "sha1/DmxUShsZuNiqPQsX2Oi9uv2sCnw=")
.add("*.publicobject.com", "sha1/DmxUShsZuNiqPQsX2Oi9uv2sCnw=")
.add("publicobject.com", "sha1/SXxoaOSEzPC6BgGmxAt/EAcsajw=")
.add("*.publicobject.com", "sha1/SXxoaOSEzPC6BgGmxAt/EAcsajw=")
.add("publicobject.com", "sha1/blhOM3W9V/bVQhsWAcLYwPU6n24=")
.add("*.publicobject.com", "sha1/blhOM3W9V/bVQhsWAcLYwPU6n24=")
.add("publicobject.com", "sha1/T5x9IXmcrQ7YuQxXnxoCmeeQ84c=")
.add("*.publicobject.com", "sha1/T5x9IXmcrQ7YuQxXnxoCmeeQ84c=")
.build());
```
* **Interceptors lists are now deep-copied by `OkHttpClient.clone()`.**
Previously clones shared interceptors, which made it difficult to customize
the interceptors on a request-by-request basis.
* New: `Headers.toMultimap()`.
* New: `RequestBody.create(MediaType, ByteString)`.
* New: `ConnectionSpec.isCompatible(SSLSocket)`.
* New: `Dispatcher.getQueuedCallCount()` and
`Dispatcher.getRunningCallCount()`. These can be useful in diagnostics.
* Fix: OkHttp no longer shares timeouts between pooled connections. This was
causing some applications to crash when connections were reused.
* Fix: `OkApacheClient` now allows an empty `PUT` and `POST`.
* Fix: Websockets no longer rebuffer socket streams.
* Fix: Websockets are now better at handling close frames.
* Fix: Content type matching is now case insensitive.
* Fix: `Vary` headers are not lost with `android.net.http.HttpResponseCache`.
* Fix: HTTP/2 wasn't enforcing stream timeouts when writing the underlying
connection. Now it is.
* Fix: Never return null on `call.proceed()`. This was a bug in call
cancelation.
* Fix: When a network interceptor mutates a request, that change is now
reflected in `Response.networkResponse()`.
* Fix: Badly-behaving caches now throw a checked exception instead of a
`NullPointerException`.
* Fix: Better handling of uncaught exceptions in MockWebServer with HTTP/2.
## Version 2.3.0
_2015-03-16_
* **HTTP/2 support.** We've done interop testing and haven't seen any
problems. HTTP/2 support has been a big effort and we're particularly
thankful to Adrian Cole who has helped us to reach this milestone.
* **RC4 cipher suites are no longer supported by default.** To connect to
old, obsolete servers relying on these cipher suites, you must create a
custom `ConnectionSpec`.
* **Beta WebSockets support.**. The `okhttp-ws` subproject offers a new
websockets client. Please try it out! When it's ready we intend to include
it with the core OkHttp library.
* **Okio updated to 1.3.0.**
```xml
<dependency>
<groupId>com.squareup.okio</groupId>
<artifactId>okio</artifactId>
<version>1.3.0</version>
</dependency>
```
* **Fix: improve parallelism of async requests.** OkHttp's Dispatcher had a
misconfigured `ExecutorService` that limited the number of worker threads.
If you're using `Call.enqueue()` this update should significantly improve
request concurrency.
* **Fix: Lazily initialize the response cache.** This avoids strict mode
warnings when initializing OkHttp on Android‘s main thread.
* **Fix: Disable ALPN on Android 4.4.** That release of the feature was
unstable and prone to native crashes in the underlying OpenSSL code.
* Fix: Don't send both `If-None-Match` and `If-Modified-Since` cache headers
when both are applicable.
* Fix: Fail early when a port is out of range.
* Fix: Offer `Content-Length` headers for multipart request bodies.
* Fix: Throw `UnknownServiceException` if a cleartext connection is attempted
when explicitly forbidden.
* Fix: Throw a `SSLPeerUnverifiedException` when host verification fails.
* Fix: MockWebServer explicitly closes sockets. (On some Android releases,
closing the input stream and output stream of a socket is not sufficient.
* Fix: Buffer outgoing HTTP/2 frames to limit how many outgoing frames are
created.
* Fix: Avoid crashing when cache writing fails due to a full disk.
* Fix: Improve caching of private responses.
* Fix: Update cache-by-default response codes.
* Fix: Reused `Request.Builder` instances no longer hold stale URL fields.
* New: ConnectionSpec can now be configured to use the SSL socket's default
cipher suites. To use, set the cipher suites to `null`.
* New: Support `DELETE` with a request body.
* New: `Headers.of(Map)` creates headers from a Map.
## Version 2.2.0
_2014-12-30_
* **`RequestBody.contentLength()` now throws `IOException`.**
This is a source-incompatible change. If you have code that calls
`RequestBody.contentLength()`, your compile will break with this
update. The change is binary-compatible, however: code compiled
for OkHttp 2.0 and 2.1 will continue to work with this update.
* **`COMPATIBLE_TLS` no longer supports SSLv3.** In response to the
[POODLE](http://googleonlinesecurity.blogspot.ca/2014/10/this-poodle-bites-exploiting-ssl-30.html)
vulnerability, OkHttp no longer offers SSLv3 when negotiation an
HTTPS connection. If you continue to need to connect to webservers
running SSLv3, you must manually configure your own `ConnectionSpec`.
* **OkHttp now offers interceptors.** Interceptors are a powerful mechanism
that can monitor, rewrite, and retry calls. The [project
wiki](https://github.com/square/okhttp/wiki/Interceptors) has a full
introduction to this new API.
* New: APIs to iterate and selectively clear the response cache.
* New: Support for SOCKS proxies.
* New: Support for `TLS_FALLBACK_SCSV`.
* New: Update HTTP/2 support to to `h2-16` and `hpack-10`.
* New: APIs to prevent retrying non-idempotent requests.
* Fix: Drop NPN support. Going forward we support ALPN only.
* Fix: The hostname verifier is now strict. This is consistent with the hostname
verifier in modern browsers.
* Fix: Improve `CONNECT` handling for misbehaving HTTP proxies.
* Fix: Don't retry requests that failed due to timeouts.
* Fix: Cache 302s and 308s that include appropriate response headers.
* Fix: Improve pooling of connections that use proxy selectors.
* Fix: Don't leak connections when using ALPN on the desktop.
* Fix: Update Jetty ALPN to `7.1.2.v20141202` (Java 7) and `8.1.2.v20141202` (Java 8).
This fixes a bug in resumed TLS sessions where the wrong protocol could be
selected.
* Fix: Don't crash in SPDY and HTTP/2 when disconnecting before connecting.
* Fix: Avoid a reverse DNS-lookup for a numeric proxy address
* Fix: Resurrect http/2 frame logging.
* Fix: Limit to 20 authorization attempts.
## Version 2.1.0
_2014-11-11_
* New: Typesafe APIs for interacting with cipher suites and TLS versions.
* Fix: Don't crash when mixing authorization challenges with upload retries.
## Version 2.1.0-RC1
_2014-11-04_
* **OkHttp now caches private responses**. We've changed from a shared cache
to a private cache, and will now store responses that use an `Authorization`
header. This means OkHttp's cache shouldn't be used on middleboxes that sit
between user agents and the origin server.
* **TLS configuration updated.** OkHttp now explicitly enables TLSv1.2,
TLSv1.1 and TLSv1.0 where they are supported. It will continue to perform
only one fallback, to SSLv3. Applications can now configure this with the
`ConnectionSpec` class.
To disable TLS fallback:
```java
client.setConnectionSpecs(Arrays.asList(
ConnectionSpec.MODERN_TLS, ConnectionSpec.CLEARTEXT));
```
To disable cleartext connections, permitting `https` URLs only:
```java
client.setConnectionSpecs(Arrays.asList(
ConnectionSpec.MODERN_TLS, ConnectionSpec.COMPATIBLE_TLS));
```
* **New cipher suites.** Please confirm that your webservers are reachable
with this limited set of cipher suites.
```
Android
Name Version
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 5.0
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 5.0
TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 5.0
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA 4.0
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA 4.0
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA 4.0
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA 4.0
TLS_ECDHE_ECDSA_WITH_RC4_128_SHA 4.0
TLS_ECDHE_RSA_WITH_RC4_128_SHA 4.0
TLS_DHE_RSA_WITH_AES_128_CBC_SHA 2.3
TLS_DHE_DSS_WITH_AES_128_CBC_SHA 2.3
TLS_DHE_RSA_WITH_AES_256_CBC_SHA 2.3
TLS_RSA_WITH_AES_128_GCM_SHA256 5.0
TLS_RSA_WITH_AES_128_CBC_SHA 2.3
TLS_RSA_WITH_AES_256_CBC_SHA 2.3
SSL_RSA_WITH_3DES_EDE_CBC_SHA 2.3 (Deprecated in 5.0)
SSL_RSA_WITH_RC4_128_SHA 2.3
SSL_RSA_WITH_RC4_128_MD5 2.3 (Deprecated in 5.0)
```
* **Okio updated to 1.0.1.**
```xml
<dependency>
<groupId>com.squareup.okio</groupId>
<artifactId>okio</artifactId>
<version>1.0.1</version>
</dependency>
```
* **New APIs to permit easy certificate pinning.** Be warned, certificate
pinning is dangerous and could prevent your application from trusting your
server!
* **Cache improvements.** This release fixes some severe cache problems
including a bug where the cache could be corrupted upon certain access
patterns. We also fixed a bug where the cache was being cleared due to a
corrupted journal. We've added APIs to configure a request's `Cache-Control`
headers, and to manually clear the cache.
* **Request cancellation fixes.** This update fixes a bug where synchronous
requests couldn't be canceled by tag. This update avoids crashing when
`onResponse()` throws an `IOException`. That failure will now be logged
instead of notifying the thread's uncaught exception handler. We've added a
new API, `Call.isCanceled()` to check if a call has been canceled.
* New: Update `MultipartBuilder` to support content length.
* New: Make it possible to mock `OkHttpClient` and `Call`.
* New: Update to h2-14 and hpack-9.
* New: OkHttp includes a user-agent by default, like `okhttp/2.1.0-RC1`.
* Fix: Handle response code `308 Permanent Redirect`.
* Fix: Don't skip the callback if a call is canceled.
* Fix: Permit hostnames with underscores.
* Fix: Permit overriding the content-type in `OkApacheClient`.
* Fix: Use the socket factory for direct connections.
* Fix: Honor `OkUrlFactory` APIs that disable redirects.
* Fix: Don't crash on concurrent modification of `SPDY` SPDY settings.
## Version 2.0.0
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.
_2014-06-21_
* **API Change**: Use `IOException` in `Callback.onFailure()`. This is
a source-incompatible change, and is different from OkHttp 2.0.0-RC2 which
used `Throwable`.
* Fix: Fixed a caching bug where we weren't storing rewritten request headers
like `Accept-Encoding`.
* Fix: Fixed bugs in handling the SPDY window size. This was stalling certain
large downloads
* Update the language level to Java 7. (OkHttp requires Android 2.3+ or Java 7+.)
## Version 2.0.0-RC2
_2014-06-11_
This update fixes problems in 2.0.0-RC1. Read the 2.0.0-RC1 changes for
advice on upgrading from 1.x to 2.x.
* Fix: Don't leak connections! There was a regression in 2.0.0-RC1 where
connections were neither closed nor pooled.
* Fix: Revert builder-style return types from OkHttpClient's timeout methods
for binary compatibility with OkHttp 1.x.
* Fix: Don't skip client stream 1 on SPDY/3.1. This fixes SPDY connectivity to
`https://google.com`, which doesn't follow the SPDY/3.1 spec!
* Fix: Always configure NPN headers. This fixes connectivity to
`https://facebook.com` when SPDY and HTTP/2 are both disabled. Otherwise an
unexpected NPN response is received and OkHttp crashes.
* Fix: Write continuation frames when HPACK data is larger than 16383 bytes.
* Fix: Don't drop uncaught exceptions thrown in async calls.
* Fix: Throw an exception eagerly when a request body is not legal. Previously
we ignored the problem at request-building time, only to crash later with a
`NullPointerException`.
* Fix: Include a backwards-compatible `OkHttp-Response-Source` header with
`OkUrlFactory `responses.
* Fix: Don't include a default User-Agent header in requests made with the Call
API. Requests made with OkUrlFactory will continue to have a default user
agent.
* New: Guava-like API to create headers:
```java
Headers headers = Headers.of(name1, value1, name2, value2, ...).
```
* New: Make the content-type header optional for request bodies.
* New: `Response.isSuccessful()` is a convenient API to check response codes.
* New: The response body can now be read outside of the callback. Response
bodies must always be closed, otherwise they will leak connections!
* New: APIs to create multipart request bodies (`MultipartBuilder`) and form
encoding bodies (`FormEncodingBuilder`).
## Version 2.0.0-RC1
_2014-05-23_
OkHttp 2 is designed around a new API that is true to HTTP, with classes for
requests, responses, headers, and calls. It uses modern Java patterns like
immutability and chained builders. The API now offers asynchronous callbacks
in addition to synchronous blocking calls.
#### API Changes
* **New Request and Response types,** each with their own builder. There's also
a `RequestBody` class to write the request body to the network and a
`ResponseBody` to read the response body from the network. The standalone
`Headers` class offers full access to the HTTP headers.
* **Okio dependency added.** OkHttp now depends on
[Okio](https://github.com/square/okio), an I/O library that makes it easier
to access, store and process data. Using this library internally makes OkHttp
faster while consuming less memory. You can write a `RequestBody` as an Okio
`BufferedSink` and a `ResponseBody` as an Okio `BufferedSource`. Standard
`InputStream` and `OutputStream` access is also available.
* **New Call and Callback types** execute requests and receive their
responses. Both types of calls can be canceled via the `Call` or the
`OkHttpClient`.
* **URLConnection support has moved to the okhttp-urlconnection module.**
If you're upgrading from 1.x, this change will impact you. You will need to
add the `okhttp-urlconnection` module to your project and use the
`OkUrlFactory` to create new instances of `HttpURLConnection`:
```java
// OkHttp 1.x:
HttpURLConnection connection = client.open(url);
// OkHttp 2.x:
HttpURLConnection connection = new OkUrlFactory(client).open(url);
```
* **Custom caches are no longer supported.** In OkHttp 1.x it was possible to
define your own response cache with the `java.net.ResponseCache` and OkHttp's
`OkResponseCache` interfaces. Both of these APIs have been dropped. In
OkHttp 2 the built-in disk cache is the only supported response cache.
* **HttpResponseCache has been renamed to Cache.** Install it with
`OkHttpClient.setCache(...)` instead of `OkHttpClient.setResponseCache(...)`.
* **OkAuthenticator has been replaced with Authenticator.** This new
authenticator has access to the full incoming response and can respond with
whichever followup request is appropriate. The `Challenge` class is now a
top-level class and `Credential` is replaced with a utility class called
`Credentials`.
* **OkHttpClient.getFollowProtocolRedirects() renamed to
getFollowSslRedirects()**. We reserve the word _protocol_ for the HTTP
version being used (HTTP/1.1, HTTP/2). The old name of this method was
misleading; it was always used to configure redirects between `https://` and
`http://` schemes.
* **RouteDatabase is no longer public API.** OkHttp continues to track which
routes have failed but this is no exposed in the API.
* **ResponseSource is gone.** This enum exposed whether a response came from
the cache, network, or both. OkHttp 2 offers more detail with raw access to
the cache and network responses in the new `Response` class.
* **TunnelRequest is gone.** It specified how to connect to an HTTP proxy.
OkHttp 2 uses the new `Request` class for this.
* **Dispatcher** is a new class that manages the queue of asynchronous calls. It
implements limits on total in-flight calls and in-flight calls per host.
#### Implementation changes
* Support Android `TrafficStats` socket tagging.
* Drop authentication headers on redirect.
* Added support for compressed data frames.
* Process push promise callbacks in order.
* Update to http/2 draft 12.
* Update to HPACK draft 07.
* Add ALPN support. Maven will use ALPN on OpenJDK 8.
* Update NPN dependency to target `jdk7u60-b13` and `Oracle jdk7u55-b13`.
* Ensure SPDY variants support zero-length DELETE and POST.
* Prevent leaking a cache item's InputStreams when metadata read fails.
* Use a string to identify TLS versions in routes.
* Add frame logger for HTTP/2.
* Replacing `httpMinorVersion` with `Protocol`. Expose HTTP/1.0 as a potential protocol.
* Use `Protocol` to describe framing.
* Implement write timeouts for HTTP/1.1 streams.
* Avoid use of SPDY stream ID 1, as that's typically used for UPGRADE.
* Support OAuth in `Authenticator`.
* Permit a dangling semicolon in media type parsing.
## Version 1.6.0
_2014-05-23_
* Offer bridges to make it easier to migrate from OkHttp 1.x to OkHttp 2.0.
This adds `OkUrlFactory`, `Cache`, and `@Deprecated` annotations for APIs
dropped in 2.0.
## Version 1.5.4
_2014-04-14_
* Drop ALPN support in Android. There's a concurrency bug in all
currently-shipping versions.
* Support asynchronous disconnects by breaking the socket only. This should
prevent flakiness from multiple threads concurrently accessing a stream.
## Version 1.5.3
_2014-03-29_
* Fix bug where the Content-Length header was not always dropped when
following a redirect from a POST to a GET.
* Implement basic support for `Thread.interrupt()`. OkHttp now checks
for an interruption before doing a blocking call. If it is interrupted,
it throws an `InterruptedIOException`.
## Version 1.5.2
_2014-03-17_
* Fix bug where deleting a file that was absent from the `HttpResponseCache`
caused an IOException.
* Fix bug in HTTP/2 where our HPACK decoder wasn't emitting entries in
certain eviction scenarios, leading to dropped response headers.
## Version 1.5.1
_2014-03-11_
* Fix 1.5.0 regression where connections should not have been recycled.
* Fix 1.5.0 regression where transparent Gzip was broken by attempting to
recover from another I/O failure.
* Fix problems where spdy/3.1 headers may not have been compressed properly.
* Fix problems with spdy/3.1 and http/2 where the wrong window size was being
used.
* Fix 1.5.0 regression where conditional cache responses could corrupt the
connection pool.
## Version 1.5.0
_2014-03-07_
##### OkHttp no longer uses the default SSL context.
Applications that want to use the global SSL context with OkHttp should configure their
OkHttpClient instances with the following:
```java
okHttpClient.setSslSocketFactory(HttpsURLConnection.getDefaultSSLSocketFactory());
```
A simpler solution is to avoid the shared default SSL socket factory. Instead, if you
need to customize SSL, do so for your specific OkHttpClient instance only.
##### Synthetic headers have changed
Previously OkHttp added a synthetic response header, `OkHttp-Selected-Transport`. It
has been replaced with a new synthetic header, `OkHttp-Selected-Protocol`.
##### Changes
* New: Support for `HTTP-draft-09/2.0`.
* New: Support for `spdy/3.1`. Dropped support for `spdy/3`.
* New: Use ALPN on Android platforms that support it (4.4+)
* New: CacheControl model and parser.
* New: Protocol selection in MockWebServer.
* Fix: Route selection shouldn't use TLS modes that we know will fail.
* Fix: Cache SPDY responses even if the response body is closed prematurely.
* Fix: Use strict timeouts when aborting a download.
* Fix: Support Shoutcast HTTP responses like `ICY 200 OK`.
* Fix: Don't unzip if there isn't a response body.
* Fix: Don't leak gzip streams on redirects.
* Fix: Don't do DNS lookups on invalid hosts.
* Fix: Exhaust the underlying stream when reading gzip streams.
* Fix: Support the `PATCH` method.
* Fix: Support request bodies on `DELETE` method.
* Fix: Drop the `okhttp-protocols` module.
* Internal: Replaced internal byte array buffers with pooled buffers ("OkBuffer").
## Version 1.3.0
_2014-01-11_
* New: Support for "PATCH" HTTP method in client and MockWebServer.
* Fix: Drop `Content-Length` header when redirected from POST to GET.
* Fix: Correctly read cached header entries with malformed header names.
* Fix: Do not directly support any authentication schemes other than "Basic".
* Fix: Respect read timeouts on recycled connections.
* Fix: Transmit multiple cookie values as a single header with delimiter.
* Fix: Ensure `null` is never returned from a connection's `getHeaderFields()`.
* Fix: Persist proper `Content-Encoding` header to cache for GZip responses.
* Fix: Eliminate rare race condition in SPDY streams that would prevent connection reuse.
* Fix: Change HTTP date formats to UTC to conform to RFC2616 section 3.3.
* Fix: Support SPDY header blocks with trailing bytes.
* Fix: Allow `;` as separator for `Cache-Control` header.
* Fix: Correct bug where HTTPS POST requests were always automatically buffered.
* Fix: Honor read timeout when parsing SPDY headers.
## Version 1.2.1
_2013-08-23_
* Resolve issue with 'jar-with-dependencies' artifact creation.
* Fix: Support empty SPDY header values.
## Version 1.2.0
_2013-08-11_
* New APIs on OkHttpClient to set default timeouts for connect and read.
* Fix bug when caching SPDY responses.
* Fix a bug with SPDY plus half-closed streams. (thanks kwuollett)
* Fix a bug in `Content-Length` reporting for gzipped streams in the Apache
HTTP client adapter. (thanks kwuollett)
* Work around the Alcatel `getByInetAddress` bug (thanks k.kocel)
* Be more aggressive about testing pooled sockets before reuse. (thanks
warpspin)
* Include `Content-Type` and `Content-Encoding` in the Apache HTTP client
adapter. (thanks kwuollett)
* Add a media type class to OkHttp.
* Change custom header prefix:
```
X-Android-Sent-Millis is now OkHttp-Sent-Millis
X-Android-Received-Millis is now OkHttp-Received-Millis
X-Android-Response-Source is now OkHttp-Response-Source
X-Android-Selected-Transport is now OkHttp-Selected-Transport
```
* Improve cache invalidation for POST-like requests.
* Bring MockWebServer into OkHttp and teach it SPDY.
## Version 1.1.1
_2013-06-23_
* Fix: ClassCastException when caching responses that were redirected from
HTTP to HTTPS.
## Version 1.1.0
_2013-06-15_
* Fix: Connection reuse was broken for most HTTPS connections due to a bug in
the way the hostname verifier was selected.
* Fix: Locking bug in SpdyConnection.
* Fix: Ignore null header values (for compatibility with HttpURLConnection).
* Add URLStreamHandlerFactory support so that `URL.openConnection()` uses
OkHttp.
* Expose the transport ("http/1.1", "spdy/3", etc.) via magic request headers.
Use `X-Android-Transports` to write the preferred transports and
`X-Android-Selected-Transport` to read the negotiated transport.
## Version 1.0.2
_2013-05-11_
* Fix: Remove use of Java 6-only APIs.
* Fix: Properly handle exceptions from `NetworkInterface` when querying MTU.
* Fix: Ensure MTU has a reasonable default and upper-bound.
## Version 1.0.1
_2013-05-06_
* Correct casing of SSL in method names (`getSslSocketFactory`/`setSslSocketFactory`).
## Version 1.0.0
_2013-05-06_
Initial release.
[brick]: https://noncombatant.org/2015/05/01/about-http-public-key-pinning/
[webdav]: https://tools.ietf.org/html/rfc4918