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<?php
/*
* Copyright 2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
namespace Google\ApiCore;
/**
* Encapsulates the custom GAPIC header information.
*/
class AgentHeaderDescriptor
{
const AGENT_HEADER_KEY = 'x-goog-api-client';
const UNKNOWN_VERSION = '';
private $metricsHeaders;
/**
* @param array $headerInfo {
* Optional.
*
* @type string $phpVersion the PHP version.
* @type string $libName the name of the client application.
* @type string $libVersion the version of the client application.
* @type string $gapicVersion the code generator version of the GAPIC library.
* @type string $apiCoreVersion the ApiCore version.
* @type string $grpcVersion the gRPC version.
* }
*/
public function __construct($headerInfo)
{
$metricsHeaders = [];
// The ordering of the headers is important. We use the fact that $metricsHeaders is an
// ordered dict. The desired ordering is:
// - phpVersion (gl-php/)
// - clientName (e.g. gccl/)
// - gapicVersion (gapic/)
// - apiCoreVersion (gax/)
// - grpcVersion (grpc/)
$phpVersion = isset($headerInfo['phpVersion'])
? $headerInfo['phpVersion']
: phpversion();
$metricsHeaders['gl-php'] = $phpVersion;
if (isset($headerInfo['libName'])) {
$clientVersion = isset($headerInfo['libVersion'])
? $headerInfo['libVersion']
: self::UNKNOWN_VERSION;
$metricsHeaders[$headerInfo['libName']] = $clientVersion;
}
$codeGenVersion = isset($headerInfo['gapicVersion'])
? $headerInfo['gapicVersion']
: self::UNKNOWN_VERSION;
$metricsHeaders['gapic'] = $codeGenVersion;
$apiCoreVersion = isset($headerInfo['apiCoreVersion'])
? $headerInfo['apiCoreVersion']
: Version::getApiCoreVersion();
$metricsHeaders['gax'] = $apiCoreVersion;
$grpcVersion = isset($headerInfo['grpcVersion'])
? $headerInfo['grpcVersion']
: phpversion('grpc');
$metricsHeaders['grpc'] = $grpcVersion;
$this->metricsHeaders = $metricsHeaders;
}
/**
* Returns an associative array that contains GAPIC header metadata.
*
* @return array
*/
public function getHeader()
{
$metricsList = [];
foreach ($this->metricsHeaders as $key => $value) {
$metricsList[] = $key . "/" . $value;
}
return [self::AGENT_HEADER_KEY => [implode(" ", $metricsList)]];
}
/**
* Returns the version string for ApiCore.
*
* @return string
*/
public static function getApiCoreVersion()
{
return self::API_CORE_VERSION;
}
}