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File name : Batch.php
Content :
<?php

/*
 * Copyright 2012 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
namespace WPMailSMTP\Vendor\Google\Http;

use WPMailSMTP\Vendor\Google\Client;
use WPMailSMTP\Vendor\Google\Service\Exception as GoogleServiceException;
use WPMailSMTP\Vendor\GuzzleHttp\Psr7;
use WPMailSMTP\Vendor\GuzzleHttp\Psr7\Request;
use WPMailSMTP\Vendor\GuzzleHttp\Psr7\Response;
use WPMailSMTP\Vendor\Psr\Http\Message\RequestInterface;
use WPMailSMTP\Vendor\Psr\Http\Message\ResponseInterface;
/**
 * Class to handle batched requests to the Google API service.
 *
 * Note that calls to `Google\Http\Batch::execute()` do not clear the queued
 * requests. To start a new batch, be sure to create a new instance of this
 * class.
 */
class Batch
{
    const BATCH_PATH = 'batch';
    private static $CONNECTION_ESTABLISHED_HEADERS = ["HTTP/1.0 200 Connection established\r\n\r\n", "HTTP/1.1 200 Connection established\r\n\r\n"];
    /** @var string Multipart Boundary. */
    private $boundary;
    /** @var array service requests to be executed. */
    private $requests = [];
    /** @var Client */
    private $client;
    private $rootUrl;
    private $batchPath;
    public function __construct(\WPMailSMTP\Vendor\Google\Client $client, $boundary = \false, $rootUrl = null, $batchPath = null)
    {
        $this->client = $client;
        $this->boundary = $boundary ?: \mt_rand();
        $this->rootUrl = \rtrim($rootUrl ?: $this->client->getConfig('base_path'), '/');
        $this->batchPath = $batchPath ?: self::BATCH_PATH;
    }
    public function add(\WPMailSMTP\Vendor\Psr\Http\Message\RequestInterface $request, $key = \false)
    {
        if (\false == $key) {
            $key = \mt_rand();
        }
        $this->requests[$key] = $request;
    }
    public function execute()
    {
        $body = '';
        $classes = [];
        $batchHttpTemplate = <<<EOF
--%s
Content-Type: application/http
Content-Transfer-Encoding: binary
MIME-Version: 1.0
Content-ID: %s

%s
%s%s


EOF;
        /** @var RequestInterface $request */
        foreach ($this->requests as $key => $request) {
            $firstLine = \sprintf('%s %s HTTP/%s', $request->getMethod(), $request->getRequestTarget(), $request->getProtocolVersion());
            $content = (string) $request->getBody();
            $headers = '';
            foreach ($request->getHeaders() as $name => $values) {
                $headers .= \sprintf("%s:%s\r\n", $name, \implode(', ', $values));
            }
            $body .= \sprintf($batchHttpTemplate, $this->boundary, $key, $firstLine, $headers, $content ? "\n" . $content : '');
            $classes['response-' . $key] = $request->getHeaderLine('X-Php-Expected-Class');
        }
        $body .= "--{$this->boundary}--";
        $body = \trim($body);
        $url = $this->rootUrl . '/' . $this->batchPath;
        $headers = ['Content-Type' => \sprintf('multipart/mixed; boundary=%s', $this->boundary), 'Content-Length' => (string) \strlen($body)];
        $request = new \WPMailSMTP\Vendor\GuzzleHttp\Psr7\Request('POST', $url, $headers, $body);
        $response = $this->client->execute($request);
        return $this->parseResponse($response, $classes);
    }
    public function parseResponse(\WPMailSMTP\Vendor\Psr\Http\Message\ResponseInterface $response, $classes = [])
    {
        $contentType = $response->getHeaderLine('content-type');
        $contentType = \explode(';', $contentType);
        $boundary = \false;
        foreach ($contentType as $part) {
            $part = \explode('=', $part, 2);
            if (isset($part[0]) && 'boundary' == \trim($part[0])) {
                $boundary = $part[1];
            }
        }
        $body = (string) $response->getBody();
        if (!empty($body)) {
            $body = \str_replace("--{$boundary}--", "--{$boundary}", $body);
            $parts = \explode("--{$boundary}", $body);
            $responses = [];
            $requests = \array_values($this->requests);
            foreach ($parts as $i => $part) {
                $part = \trim($part);
                if (!empty($part)) {
                    list($rawHeaders, $part) = \explode("\r\n\r\n", $part, 2);
                    $headers = $this->parseRawHeaders($rawHeaders);
                    $status = \substr($part, 0, \strpos($part, "\n"));
                    $status = \explode(" ", $status);
                    $status = $status[1];
                    list($partHeaders, $partBody) = $this->parseHttpResponse($part, 0);
                    $response = new \WPMailSMTP\Vendor\GuzzleHttp\Psr7\Response((int) $status, $partHeaders, \WPMailSMTP\Vendor\GuzzleHttp\Psr7\Utils::streamFor($partBody));
                    // Need content id.
                    $key = $headers['content-id'];
                    try {
                        $response = \WPMailSMTP\Vendor\Google\Http\REST::decodeHttpResponse($response, $requests[$i - 1]);
                    } catch (\WPMailSMTP\Vendor\Google\Service\Exception $e) {
                        // Store the exception as the response, so successful responses
                        // can be processed.
                        $response = $e;
                    }
                    $responses[$key] = $response;
                }
            }
            return $responses;
        }
        return null;
    }
    private function parseRawHeaders($rawHeaders)
    {
        $headers = [];
        $responseHeaderLines = \explode("\r\n", $rawHeaders);
        foreach ($responseHeaderLines as $headerLine) {
            if ($headerLine && \strpos($headerLine, ':') !== \false) {
                list($header, $value) = \explode(': ', $headerLine, 2);
                $header = \strtolower($header);
                if (isset($headers[$header])) {
                    $headers[$header] = \array_merge((array) $headers[$header], (array) $value);
                } else {
                    $headers[$header] = $value;
                }
            }
        }
        return $headers;
    }
    /**
     * Used by the IO lib and also the batch processing.
     *
     * @param string $respData
     * @param int $headerSize
     * @return array
     */
    private function parseHttpResponse($respData, $headerSize)
    {
        // check proxy header
        foreach (self::$CONNECTION_ESTABLISHED_HEADERS as $established_header) {
            if (\stripos($respData, $established_header) !== \false) {
                // existed, remove it
                $respData = \str_ireplace($established_header, '', $respData);
                // Subtract the proxy header size unless the cURL bug prior to 7.30.0
                // is present which prevented the proxy header size from being taken into
                // account.
                // @TODO look into this
                // if (!$this->needsQuirk()) {
                //   $headerSize -= strlen($established_header);
                // }
                break;
            }
        }
        if ($headerSize) {
            $responseBody = \substr($respData, $headerSize);
            $responseHeaders = \substr($respData, 0, $headerSize);
        } else {
            $responseSegments = \explode("\r\n\r\n", $respData, 2);
            $responseHeaders = $responseSegments[0];
            $responseBody = isset($responseSegments[1]) ? $responseSegments[1] : null;
        }
        $responseHeaders = $this->parseRawHeaders($responseHeaders);
        return [$responseHeaders, $responseBody];
    }
}
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