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<?php
namespace Aws\Api\Parser;
use Aws\Api\DateTimeResult;
use Aws\Api\Shape;
use Aws\Api\StructureShape;
use Aws\Result;
use Aws\CommandInterface;
use Psr\Http\Message\ResponseInterface;
/**
* @internal
*/
abstract class AbstractRestParser extends AbstractParser
{
use PayloadParserTrait;
/**
* Parses a payload from a response.
*
* @param ResponseInterface $response Response to parse.
* @param StructureShape $member Member to parse
* @param array $result Result value
*
* @return mixed
*/
abstract protected function payload(
ResponseInterface $response,
StructureShape $member,
array &$result
);
public function __invoke(
CommandInterface $command,
ResponseInterface $response
) {
$output = $this->api->getOperation($command->getName())->getOutput();
$result = [];
if ($payload = $output['payload']) {
$this->extractPayload($payload, $output, $response, $result);
}
foreach ($output->getMembers() as $name => $member) {
switch ($member['location']) {
case 'header':
$this->extractHeader($name, $member, $response, $result);
break;
case 'headers':
$this->extractHeaders($name, $member, $response, $result);
break;
case 'statusCode':
$this->extractStatus($name, $response, $result);
break;
}
}
if (!$payload
&& $response->getBody()->getSize() > 0
&& count($output->getMembers()) > 0
) {
// if no payload was found, then parse the contents of the body
$this->payload($response, $output, $result);
}
return new Result($result);
}
private function extractPayload(
$payload,
StructureShape $output,
ResponseInterface $response,
array &$result
) {
$member = $output->getMember($payload);
if (!empty($member['eventstream'])) {
$result[$payload] = new EventParsingIterator(
$response->getBody(),
$member,
$this
);
} else if ($member instanceof StructureShape) {
// Structure members parse top-level data into a specific key.
$result[$payload] = [];
$this->payload($response, $member, $result[$payload]);
} else {
// Streaming data is just the stream from the response body.
$result[$payload] = $response->getBody();
}
}
/**
* Extract a single header from the response into the result.
*/
private function extractHeader(
$name,
Shape $shape,
ResponseInterface $response,
&$result
) {
$value = $response->getHeaderLine($shape['locationName'] ?: $name);
switch ($shape->getType()) {
case 'float':
case 'double':
$value = (float) $value;
break;
case 'long':
$value = (int) $value;
break;
case 'boolean':
$value = filter_var($value, FILTER_VALIDATE_BOOLEAN);
break;
case 'blob':
$value = base64_decode($value);
break;
case 'timestamp':
try {
$value = DateTimeResult::fromTimestamp(
$value,
!empty($shape['timestampFormat']) ? $shape['timestampFormat'] : null
);
break;
} catch (\Exception $e) {
// If the value cannot be parsed, then do not add it to the
// output structure.
return;
}
case 'string':
try {
if ($shape['jsonvalue']) {
$value = $this->parseJson(base64_decode($value), $response);
}
// If value is not set, do not add to output structure.
if (!isset($value)) {
return;
}
break;
} catch (\Exception $e) {
//If the value cannot be parsed, then do not add it to the
//output structure.
return;
}
}
$result[$name] = $value;
}
/**
* Extract a map of headers with an optional prefix from the response.
*/
private function extractHeaders(
$name,
Shape $shape,
ResponseInterface $response,
&$result
) {
// Check if the headers are prefixed by a location name
$result[$name] = [];
$prefix = $shape['locationName'];
$prefixLen = strlen($prefix);
foreach ($response->getHeaders() as $k => $values) {
if (!$prefixLen) {
$result[$name][$k] = implode(', ', $values);
} elseif (stripos($k, $prefix) === 0) {
$result[$name][substr($k, $prefixLen)] = implode(', ', $values);
}
}
}
/**
* Places the status code of the response into the result array.
*/
private function extractStatus(
$name,
ResponseInterface $response,
array &$result
) {
$result[$name] = (int) $response->getStatusCode();
}
}