1. Adopting a marker interface for Guzzle exceptions.
A. All exceptions emitted from Guzzle are now wrapped with a Guzzle namespaced exception.
B. Guzzle\Common\GuzzleExceptionInterface was renamed to Guzzle\Common\GuzzleException
C. Guzzle\Common\ExceptionCollection was renamed to Guzzle\Common\Exception\ExceptionCollection
2. Using Header objects for Request and Response objects
A. When you call $request->getHeader('X'), you will get back a Guzzle\Http\Message\Header object that contains all of the headers that case insensitively match. This object can be cast to a string or iterated like an array. You can pass true in the second argument to retrieve the header as a string.
B. Removing the old Guzzle\Common\Collection based searching arguments from most of the request and response header methods. All retrievals are case-insensitive and return Header objects.
3. Changing the two headers added by the cache plugin to just one header with key and ttl.
4. Changing Guzzle\Http\Message\Response::factory() to fromMessage().
5. Removing the NullObject return value from ServiceDescriptions and instead simply returning null
New Features / enhancements:
1. Adding Guzzle\Http\Message\AbstractMessage::addHeaders()
2. Making it simpler to create service descriptions using a unified factory method that delegates to other factories.
3. Better handling of ports and hosts in Guzzle\Http\Url
Note: This is a noisy diff because I'm removing trailing whitespace and adding a new line at the end of each source file.
[Http] UriTemplate syntax supports {} or {{}} for backwards compatibility.
[Http] Guzzle::inject() now allows {} or {{}} injection for consistency.
[Http] BC: removing Guzzle\Http\Client::inject and now using Guzzle\Http\Client::expandTemplate.
[Http] Can use a custom syntax for URI templates (this might be useful for something like Solr because Solr actually uses {}).
[Http] Adding the ability to inject a custom UriTemplate into clients or just use the default UriTemplate
[Http] You can now use an array when creating a request via a client to specify a URI template and additional template variables.
[Service] Adding support for URI templates to service descriptions.
[Service] [BC] removing Guzzle\Service\Description\ApiCommand::getPath() and replacing it with getUri().
[Service] Use "uri" instead of "path" when creating service descriptions. However, there is still backwards compatibility with the "path" attribute.
Adopting composer for dependency management
Updating LICENSE, travis build file, making better use of git ignores, and remove unused build target
Removing @author tags. Use the commit history for a changelog.
Moving files from build folder to /
Adding min build target to product a Guzzle only phar with no autoloader
[Common] Accepting ZF1 or ZF2 cache in ZendCacheAdapter
[Common] Optimizing Stream wrapper and EntityBody abstractions.
[Common] [Http] Migrating from Guzzle event system to the Symfony2 event dispatcher
[Common] Moved Inflector and Inspector to Service namespace
[Http] Simplifying Guzzle\Guzzle curl detection
[Http] Removing Guzzle\Http\Pool and now using Guzzle\Http\Curl\CurlMulti
[Http] The helper methods from Guzzle\Http\Message\RequestFactory have been removed to prevent confusion and encourage developers to use Guzzle\Http\Client to create requests.
[Http] Clients can now send one or more requests in an array using the send() method, so the batch() method was removed.
[Http] Updating curl multi to allow blocking calls while sending other transfers
[Http] Making the Request::hasHeader method more intuitive. Guzzle\Http\Message\AbstractMessage::hasHeader() now returns true if the header is found using exact matching. If the header is found using a regex or case-insensitive match, then it will return the name of the found header.
[Http] Removing content-type guessing from EntityBody based on file extension and solely using finfo.
[Http] Adding basic auth plugin
[Http] Cleaning up CookieJar and CurlMulti
[Http] Removing custom rawurlencode from QueryString because PHP 5.3 now properly deals with tilde characters.
[Http] Minor optimization to parsing messages in RequestFactory
[Http] Adding Guzzle\Http\Client for developers that don't need commands or service descriptions
[Http] Making it easier to set a global User-Agent header for a Guzzle\Http\Client
[Http] Fixing the discrepancies between the ClientInterface and Guzzle\Http\Client
[Http] Adding the ability to set and retrieve tokenized headers from Requests and Responses
[Service] Ditching NIH filters and using the Symfony2 validator
[Service] Moving most service building logic to the ServiceBuilder::factory method so that it is easier to build custom config readers.
[Service] Allowing deep nested command inheritance.
[Service] Cleaning up Inflector caching.
[Service] Getting rid of concept of can_batch because everything is now sent in parallel.
[Service] Adding a JSON description builder.
[Service] Cleaning up ResourceIteratorApplyBatched.
[Service] Removing caching stuff from ServiceBuilder because the data being cached is extremely fast to generate.
[Service] Added a method to serialize the ServiceDescription in case a ServiceDescription needs to be cached in an application.
[Service] Making description builders use static methods.
[Service] Adding support to include other description files for XML and JSON description builders.
[Service] Adding support for filters to ApiCommands
[Service] Using {{}} instead of $. to reference other services as a dependency for another service
