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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:
```
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 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:
```
    RequestBody.create(null, new byte[0]);
```

CertificatePinner now supports wildcard hostnames. As always with
certificate pinning, you must be very careful to avoid bricking
your app. You'll need to pin both the top-level domain and the *. domain
for full coverage.

 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.

<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
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 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:
```
client.setConnectionSpecs(Arrays.asList(
    ConnectionSpec.MODERN_TLS, ConnectionSpec.CLEARTEXT));
```
To disable cleartext connections, permitting https URLs only:
```
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.

<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
OkUrlFactoryresponses.
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:

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, 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:

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.