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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** @license For full copyright and license information, please see the LICENSE.md file. */ |
| 6 | |
| 7 | namespace App\Modules\Dav\Infrastructure\Client; |
| 8 | |
| 9 | defined('AMMONLY_APP') || exit('Direct script access is forbidden.'); |
| 10 | |
| 11 | use App\Core\Security\Http\SsrfGuard; |
| 12 | use App\Modules\Dav\Domain\Exception\DavClientException; |
| 13 | use App\Modules\Dav\Domain\Model\DavAccount; |
| 14 | use App\Modules\Dav\Domain\Model\DavResource; |
| 15 | use App\Modules\Dav\Domain\Repository\DavClientInterface; |
| 16 | use SimpleXMLElement; |
| 17 | |
| 18 | /** |
| 19 | * High-performance HTTP cURL DAV Client. |
| 20 | * |
| 21 | * Implements CalDAV (RFC 4791) and CardDAV (RFC 6352) protocol operations with SOGo server. |
| 22 | * |
| 23 | * @package App\Modules\Dav\Infrastructure\Client |
| 24 | */ |
| 25 | final class CurlDavClient implements DavClientInterface |
| 26 | { |
| 27 | private const int TIMEOUT_SECONDS = 30; |
| 28 | |
| 29 | /** |
| 30 | * CurlDavClient constructor. |
| 31 | * |
| 32 | * @param bool $allowPrivateIps Whether to permit RFC 1918 or loopback endpoints. |
| 33 | */ |
| 34 | public function __construct( |
| 35 | private bool $allowPrivateIps = false |
| 36 | ) { |
| 37 | } |
| 38 | private const string XML_CALENDAR_QUERY = <<<XML |
| 39 | <?xml version="1.0" encoding="utf-8" ?> |
| 40 | <C:calendar-query xmlns:D="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav"> |
| 41 | <D:prop> |
| 42 | <D:getetag/> |
| 43 | <C:calendar-data/> |
| 44 | </D:prop> |
| 45 | <C:filter> |
| 46 | <C:comp-filter name="VCALENDAR"> |
| 47 | <C:comp-filter name="VEVENT" /> |
| 48 | </C:comp-filter> |
| 49 | </C:filter> |
| 50 | </C:calendar-query> |
| 51 | XML; |
| 52 | |
| 53 | private const string XML_ADDRESSBOOK_QUERY = <<<XML |
| 54 | <?xml version="1.0" encoding="utf-8" ?> |
| 55 | <CARD:addressbook-query xmlns:D="DAV:" xmlns:CARD="urn:ietf:params:xml:ns:carddav"> |
| 56 | <D:prop> |
| 57 | <D:getetag/> |
| 58 | <CARD:address-data/> |
| 59 | </D:prop> |
| 60 | </CARD:addressbook-query> |
| 61 | XML; |
| 62 | |
| 63 | /** |
| 64 | * {@inheritdoc} |
| 65 | */ |
| 66 | public function listResources(DavAccount $account, string $collectionUrl, string $resourceType): array |
| 67 | { |
| 68 | $isCalendar = ($resourceType === 'calendar'); |
| 69 | $xmlBody = $isCalendar ? self::XML_CALENDAR_QUERY : self::XML_ADDRESSBOOK_QUERY; |
| 70 | $headers = [ |
| 71 | 'Depth: 1', |
| 72 | 'Content-Type: application/xml; charset=utf-8', |
| 73 | 'Prefer: return-minimal', |
| 74 | ]; |
| 75 | |
| 76 | $response = $this->executeRequest($account, 'REPORT', $collectionUrl, $headers, $xmlBody); |
| 77 | if ($response['code'] !== 207 && $response['code'] !== 200) { |
| 78 | return []; |
| 79 | } |
| 80 | |
| 81 | return $this->parseMultiStatusResponse($response['body'], $collectionUrl, $isCalendar); |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * {@inheritdoc} |
| 86 | */ |
| 87 | public function getResource(DavAccount $account, string $resourceUrl): DavResource |
| 88 | { |
| 89 | $headers = ['Accept: text/calendar, text/vcard, */*']; |
| 90 | $response = $this->executeRequest($account, 'GET', $resourceUrl, $headers); |
| 91 | |
| 92 | if ($response['code'] !== 200) { |
| 93 | throw new DavClientException(sprintf('DAV resource fetch failed with status %d', $response['code'])); |
| 94 | } |
| 95 | |
| 96 | $etag = $this->extractHeaderValue($response['headers'], 'etag'); |
| 97 | $contentType = $this->extractHeaderValue($response['headers'], 'content-type'); |
| 98 | $uid = basename($resourceUrl, (str_contains($contentType, 'vcard') ? '.vcf' : '.ics')); |
| 99 | |
| 100 | return new DavResource($uid, trim($etag, '"'), $response['body'], $contentType, $resourceUrl); |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * {@inheritdoc} |
| 105 | */ |
| 106 | public function putResource(DavAccount $account, string $resourceUrl, DavResource $resource): string |
| 107 | { |
| 108 | $headers = [ |
| 109 | 'Content-Type: ' . $resource->contentType, |
| 110 | ]; |
| 111 | if ($resource->etag !== '') { |
| 112 | $headers[] = 'If-Match: "' . trim($resource->etag, '"') . '"'; |
| 113 | } |
| 114 | |
| 115 | $response = $this->executeRequest($account, 'PUT', $resourceUrl, $headers, $resource->content); |
| 116 | if ($response['code'] !== 200 && $response['code'] !== 201 && $response['code'] !== 204) { |
| 117 | throw new DavClientException( |
| 118 | sprintf('DAV PUT failed with HTTP %d: %s', $response['code'], substr($response['body'], 0, 200)) |
| 119 | ); |
| 120 | } |
| 121 | |
| 122 | $etag = $this->extractHeaderValue($response['headers'], 'etag'); |
| 123 | return trim($etag, '"'); |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * {@inheritdoc} |
| 128 | */ |
| 129 | public function deleteResource(DavAccount $account, string $resourceUrl, string $etag = ''): bool |
| 130 | { |
| 131 | $headers = []; |
| 132 | if ($etag !== '') { |
| 133 | $headers[] = 'If-Match: "' . trim($etag, '"') . '"'; |
| 134 | } |
| 135 | |
| 136 | $response = $this->executeRequest($account, 'DELETE', $resourceUrl, $headers); |
| 137 | return in_array($response['code'], [200, 204, 404], true); |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Executes an authenticated HTTP request using cURL. |
| 142 | * |
| 143 | * @param DavAccount $account User connection credentials. |
| 144 | * @param string $method HTTP method verb. |
| 145 | * @param string $url Target endpoint URL. |
| 146 | * @param array<int, string> $headers Custom HTTP request headers. |
| 147 | * @param string $body Optional request body payload. |
| 148 | * @return array{code: int, headers: string, body: string} Response structure. |
| 149 | */ |
| 150 | private function executeRequest( |
| 151 | DavAccount $account, |
| 152 | string $method, |
| 153 | string $url, |
| 154 | array $headers = [], |
| 155 | string $body = '' |
| 156 | ): array { |
| 157 | if (!SsrfGuard::isUrlSafe($url, $this->allowPrivateIps)) { |
| 158 | throw new DavClientException( |
| 159 | sprintf('SSRF Protection blocked destination URL "%s". Destination is restricted.', $url) |
| 160 | ); |
| 161 | } |
| 162 | |
| 163 | $ch = curl_init(); |
| 164 | curl_setopt($ch, CURLOPT_URL, $url); |
| 165 | curl_setopt($ch, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS); |
| 166 | curl_setopt($ch, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS); |
| 167 | curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method); |
| 168 | curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); |
| 169 | curl_setopt($ch, CURLOPT_HEADER, true); |
| 170 | curl_setopt($ch, CURLOPT_TIMEOUT, self::TIMEOUT_SECONDS); |
| 171 | curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true); |
| 172 | curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC); |
| 173 | curl_setopt($ch, CURLOPT_USERPWD, sprintf('%s:%s', $account->email, $account->password)); |
| 174 | |
| 175 | if ($body !== '') { |
| 176 | curl_setopt($ch, CURLOPT_POSTFIELDS, $body); |
| 177 | } |
| 178 | if (!empty($headers)) { |
| 179 | curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); |
| 180 | } |
| 181 | |
| 182 | $rawResponse = curl_exec($ch); |
| 183 | $httpCode = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE); |
| 184 | $headerSize = (int) curl_getinfo($ch, CURLINFO_HEADER_SIZE); |
| 185 | curl_close($ch); |
| 186 | |
| 187 | if ($rawResponse === false || !is_string($rawResponse)) { |
| 188 | return ['code' => 0, 'headers' => '', 'body' => '']; |
| 189 | } |
| 190 | |
| 191 | $resHeaders = substr($rawResponse, 0, $headerSize); |
| 192 | $resBody = substr($rawResponse, $headerSize); |
| 193 | |
| 194 | return ['code' => $httpCode, 'headers' => $resHeaders, 'body' => $resBody]; |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * Parses RFC 2518 / RFC 4791 Multi-Status XML response into DavResource collection. |
| 199 | * |
| 200 | * @param string $xmlContent Raw Multi-Status XML payload. |
| 201 | * @param string $collectionUrl Base collection URL. |
| 202 | * @param bool $isCalendar True if calendar payload, false if address book. |
| 203 | * @return array<string, DavResource> Map of UID => DavResource. |
| 204 | */ |
| 205 | private function parseMultiStatusResponse(string $xmlContent, string $collectionUrl, bool $isCalendar): array |
| 206 | { |
| 207 | $xml = $this->loadMultiStatusXml($xmlContent); |
| 208 | if ($xml === null) { |
| 209 | return []; |
| 210 | } |
| 211 | |
| 212 | $xml->registerXPathNamespace('d', 'DAV:'); |
| 213 | $responses = $xml->xpath('//d:response'); |
| 214 | if (!is_array($responses)) { |
| 215 | return []; |
| 216 | } |
| 217 | |
| 218 | $collectionPath = rtrim(parse_url($collectionUrl, PHP_URL_PATH) ?? '', '/'); |
| 219 | $resources = []; |
| 220 | |
| 221 | foreach ($responses as $resp) { |
| 222 | $item = $this->parseDavResponseItem($resp, $collectionPath, $isCalendar); |
| 223 | if ($item !== null) { |
| 224 | $resources[$item->uid] = $item; |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | return $resources; |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * Parses XML string into SimpleXMLElement or returns null on failure. |
| 233 | */ |
| 234 | private function loadMultiStatusXml(string $xmlContent): ?SimpleXMLElement |
| 235 | { |
| 236 | if (trim($xmlContent) === '') { |
| 237 | return null; |
| 238 | } |
| 239 | |
| 240 | $xml = simplexml_load_string( |
| 241 | $xmlContent, |
| 242 | SimpleXMLElement::class, |
| 243 | LIBXML_NONET | LIBXML_NOERROR | LIBXML_NOWARNING |
| 244 | ); |
| 245 | return $xml !== false ? $xml : null; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * Parses a single DAV response XML element into a DavResource object. |
| 250 | */ |
| 251 | private function parseDavResponseItem( |
| 252 | SimpleXMLElement $resp, |
| 253 | string $collectionPath, |
| 254 | bool $isCalendar |
| 255 | ): ?DavResource { |
| 256 | $dav = $resp->children('DAV:'); |
| 257 | $href = (string) ($dav->href ?? ''); |
| 258 | if ($href === '' || rtrim($href, '/') === $collectionPath) { |
| 259 | return null; |
| 260 | } |
| 261 | |
| 262 | $props = $this->extractDavProps($dav, $isCalendar); |
| 263 | $cleanEtag = trim($props['etag'], '"'); |
| 264 | $uid = basename($href, $isCalendar ? '.ics' : '.vcf'); |
| 265 | $mime = $isCalendar ? 'text/calendar; charset=utf-8' : 'text/vcard; charset=utf-8'; |
| 266 | |
| 267 | return new DavResource($uid, $cleanEtag, $props['data'], $mime, $href); |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * Extracts etag and payload data from DAV propstat elements. |
| 272 | * |
| 273 | * @return array{etag: string, data: string} |
| 274 | */ |
| 275 | private function extractDavProps(SimpleXMLElement $dav, bool $isCalendar): array |
| 276 | { |
| 277 | $etag = ''; |
| 278 | $data = ''; |
| 279 | |
| 280 | foreach ($dav->propstat as $propstat) { |
| 281 | $prop = $propstat->children('DAV:')->prop; |
| 282 | if ($prop === null) { |
| 283 | continue; |
| 284 | } |
| 285 | |
| 286 | $etag = (string) ($prop->children('DAV:')->getetag ?? ''); |
| 287 | $ns = $isCalendar ? 'urn:ietf:params:xml:ns:caldav' : 'urn:ietf:params:xml:ns:carddav'; |
| 288 | $field = $isCalendar ? 'calendar-data' : 'address-data'; |
| 289 | $child = $prop->children($ns); |
| 290 | $data = (string) ($child->{$field} ?? ''); |
| 291 | } |
| 292 | |
| 293 | return ['etag' => $etag, 'data' => $data]; |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * Extracts header value case-insensitively from raw HTTP headers string. |
| 298 | * |
| 299 | * @param string $rawHeaders Raw headers block. |
| 300 | * @param string $headerName Header name to locate. |
| 301 | * @return string Found header value or empty string. |
| 302 | */ |
| 303 | private function extractHeaderValue(string $rawHeaders, string $headerName): string |
| 304 | { |
| 305 | $pattern = '/^' . preg_quote($headerName, '/') . ':\s*(.+)$/im'; |
| 306 | if (preg_match($pattern, $rawHeaders, $matches)) { |
| 307 | return trim($matches[1]); |
| 308 | } |
| 309 | return ''; |
| 310 | } |
| 311 | } |