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<?php |
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namespace Yiisoft\Yii\Web\Middleware; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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/** |
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* Basic network resolver updates an instance of server request with protocol from special headers. |
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* |
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* It can be used in the following cases: |
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* - not required IP resolve to access the user's IP |
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* - user's IP is already resolved (eg `ngx_http_realip_module` or similar) |
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*/ |
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class BasicNetworkResolver implements MiddlewareInterface |
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{ |
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private const DEFAULT_PROTOCOL_AND_ACCEPTABLE_VALUES = [ |
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'http' => ['http'], |
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'https' => ['https', 'on'], |
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]; |
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private $protocolHeaders = []; |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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$newScheme = null; |
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foreach ($this->protocolHeaders as $header => $data) { |
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if (!$request->hasHeader($header)) { |
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continue; |
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} |
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$headerValues = $request->getHeader($header); |
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if (is_callable($data)) { |
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$newScheme = $data($headerValues, $header, $request); |
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if ($newScheme === null) { |
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continue; |
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} |
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if (!is_string($newScheme)) { |
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throw new \RuntimeException('The scheme is neither string nor null!'); |
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} |
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if ($newScheme === '') { |
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throw new \RuntimeException('The scheme cannot be an empty string!'); |
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} |
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break; |
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} |
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$headerValue = strtolower($headerValues[0]); |
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foreach ($data as $protocol => $acceptedValues) { |
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if (!in_array($headerValue, $acceptedValues, true)) { |
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continue; |
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} |
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$newScheme = $protocol; |
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break 2; |
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} |
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} |
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$uri = $request->getUri(); |
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if ($newScheme !== null && $newScheme !== $uri->getScheme()) { |
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$request = $request->withUri($uri->withScheme($newScheme)); |
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} |
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return $handler->handle($request); |
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} |
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/** |
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* With added header to check for determining whether the connection is made via HTTP or HTTPS (or any protocol). |
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* |
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* The match of header names and values is case-insensitive. |
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* It's not advisable to put insecure/untrusted headers here. |
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* |
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* Accepted types of values: |
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* - NULL (default): {{DEFAULT_PROTOCOL_AND_ACCEPTABLE_VALUES}} |
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* - callable: custom function for getting the protocol |
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* ```php |
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* ->withProtocolHeader('x-forwarded-proto', function(array $values, string $header, ServerRequestInterface $request) { |
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* return $values[0] === 'https' ? 'https' : 'http'; |
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* return null; // If it doesn't make sense. |
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* }); |
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* ``` |
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* - array: The array keys are protocol string and the array value is a list of header values that indicate the protocol. |
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* ```php |
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* ->withProtocolHeader('x-forwarded-proto', [ |
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* 'http' => ['http'], |
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* 'https' => ['https'] |
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* ]); |
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* ``` |
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* @param string $header |
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* @param callable|array|null $values |
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* @see DEFAULT_PROTOCOL_AND_ACCEPTABLE_VALUES |
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*/ |
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public function withAddedProtocolHeader(string $header, $values = null): self |
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{ |
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$new = clone $this; |
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$header = strtolower($header); |
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if ($values === null) { |
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$new->protocolHeaders[$header] = self::DEFAULT_PROTOCOL_AND_ACCEPTABLE_VALUES; |
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return $new; |
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} |
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if (is_callable($values)) { |
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$new->protocolHeaders[$header] = $values; |
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return $new; |
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} |
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if (!is_array($values)) { |
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throw new \RuntimeException('Accepted values is not array nor callable!'); |
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} |
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if (count($values) === 0) { |
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throw new \RuntimeException('Accepted values cannot be an empty array!'); |
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} |
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$new->protocolHeaders[$header] = []; |
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foreach ($values as $protocol => $acceptedValues) { |
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if (!is_string($protocol)) { |
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throw new \RuntimeException('The protocol must be type of string!'); |
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} |
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if ($protocol === '') { |
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throw new \RuntimeException('The protocol cannot be an empty string!'); |
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} |
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$new->protocolHeaders[$header][$protocol] = array_map('strtolower', (array)$acceptedValues); |
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} |
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return $new; |
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} |
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public function withoutProtocolHeader(string $header): self |
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{ |
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$new = clone $this; |
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unset($new->protocolHeaders[strtolower($header)]); |
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return $new; |
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} |
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public function withoutProtocolHeaders(?array $headers = null): self |
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{ |
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$new = clone $this; |
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if ($headers === null) { |
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$new->protocolHeaders = []; |
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} else { |
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foreach ($headers as $header) { |
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$new = $new->withoutProtocolHeader($header); |
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} |
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} |
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return $new; |
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} |
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} |
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yiisoft /
yii-web
