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124 lines
3.3 KiB
124 lines
3.3 KiB
1 year ago
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<?php
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/**
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* This file is part of CodeIgniter 4 framework.
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*
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* (c) CodeIgniter Foundation <admin@codeigniter.com>
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*
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* For the full copyright and license information, please view
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* the LICENSE file that was distributed with this source code.
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*/
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namespace CodeIgniter\Honeypot;
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use CodeIgniter\Honeypot\Exceptions\HoneypotException;
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use CodeIgniter\HTTP\IncomingRequest;
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use CodeIgniter\HTTP\RequestInterface;
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use CodeIgniter\HTTP\ResponseInterface;
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use Config\Honeypot as HoneypotConfig;
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/**
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* class Honeypot
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*
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* @see \CodeIgniter\Honeypot\HoneypotTest
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*/
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class Honeypot
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{
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/**
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* Our configuration.
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*
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* @var HoneypotConfig
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*/
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protected $config;
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/**
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* Constructor.
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*
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* @throws HoneypotException
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*/
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public function __construct(HoneypotConfig $config)
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{
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$this->config = $config;
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if (! $this->config->hidden) {
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throw HoneypotException::forNoHiddenValue();
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}
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if ($this->config->container === '' || strpos($this->config->container, '{template}') === false) {
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$this->config->container = '<div style="display:none">{template}</div>';
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}
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$this->config->containerId ??= 'hpc';
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if ($this->config->template === '') {
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throw HoneypotException::forNoTemplate();
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}
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if ($this->config->name === '') {
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throw HoneypotException::forNoNameField();
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}
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}
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/**
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* Checks the request if honeypot field has data.
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*
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* @return bool
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*/
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public function hasContent(RequestInterface $request)
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{
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assert($request instanceof IncomingRequest);
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return ! empty($request->getPost($this->config->name));
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}
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/**
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* Attaches Honeypot template to response.
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*
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* @return void
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*/
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public function attachHoneypot(ResponseInterface $response)
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{
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if ($response->getBody() === null) {
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return;
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}
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if ($response->getCSP()->enabled()) {
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// Add id attribute to the container tag.
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$this->config->container = str_ireplace(
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'>{template}',
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' id="' . $this->config->containerId . '">{template}',
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$this->config->container
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);
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}
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$prepField = $this->prepareTemplate($this->config->template);
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$bodyBefore = $response->getBody();
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$bodyAfter = str_ireplace('</form>', $prepField . '</form>', $bodyBefore);
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if ($response->getCSP()->enabled() && ($bodyBefore !== $bodyAfter)) {
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// Add style tag for the container tag in the head tag.
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$style = '<style ' . csp_style_nonce() . '>#' . $this->config->containerId . ' { display:none }</style>';
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$bodyAfter = str_ireplace('</head>', $style . '</head>', $bodyAfter);
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}
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$response->setBody($bodyAfter);
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}
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/**
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* Prepares the template by adding label
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* content and field name.
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*/
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protected function prepareTemplate(string $template): string
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{
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$template = str_ireplace('{label}', $this->config->label, $template);
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$template = str_ireplace('{name}', $this->config->name, $template);
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if ($this->config->hidden) {
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$template = str_ireplace('{template}', $template, $this->config->container);
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}
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return $template;
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}
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}
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