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- 28.08.2024
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Message.php
001 <?php
002
003 namespace GuzzleHttp\Psr7;
004
005 use Psr\Http\Message\MessageInterface;
006 use Psr\Http\Message\RequestInterface;
007 use Psr\Http\Message\ResponseInterface;
008
009 final class Message
010 {
011 /**
012 * Returns the string representation of an HTTP message.
013 *
014 * @param MessageInterface $message Message to convert to a string.
015 *
016 * @return string
017 */
018 public static function toString(MessageInterface $message)
019 {
020 if ($message instanceof RequestInterface) {
021 $msg = trim($message->getMethod() . ' '
022 . $message->getRequestTarget())
023 . ' HTTP/' . $message->getProtocolVersion();
024 if (!$message->hasHeader('host')) {
025 $msg .= "\r\nHost: " . $message->getUri()->getHost();
026 }
027 } elseif ($message instanceof ResponseInterface) {
028 $msg = 'HTTP/' . $message->getProtocolVersion() . ' '
029 . $message->getStatusCode() . ' '
030 . $message->getReasonPhrase();
031 } else {
032 throw new \InvalidArgumentException('Unknown message type');
033 }
034
035 foreach ($message->getHeaders() as $name => $values) {
036 if (strtolower($name) === 'set-cookie') {
037 foreach ($values as $value) {
038 $msg .= "\r\n{$name}: " . $value;
039 }
040 } else {
041 $msg .= "\r\n{$name}: " . implode(', ', $values);
042 }
043 }
044
045 return "{$msg}\r\n\r\n" . $message->getBody();
046 }
047
048 /**
049 * Get a short summary of the message body.
050 *
051 * Will return `null` if the response is not printable.
052 *
053 * @param MessageInterface $message The message to get the body summary
054 * @param int $truncateAt The maximum allowed size of the summary
055 *
056 * @return string|null
057 */
058 public static function bodySummary(MessageInterface $message, $truncateAt = 120)
059 {
060 $body = $message->getBody();
061
062 if (!$body->isSeekable() || !$body->isReadable()) {
063 return null;
064 }
065
066 $size = $body->getSize();
067
068 if ($size === 0) {
069 return null;
070 }
071
072 $summary = $body->read($truncateAt);
073 $body->rewind();
074
075 if ($size > $truncateAt) {
076 $summary .= ' (truncated...)';
077 }
078
079 // Matches any printable character, including unicode characters:
080 // letters, marks, numbers, punctuation, spacing, and separators.
081 if (preg_match('/[^\pL\pM\pN\pP\pS\pZ\n\r\t]/u', $summary)) {
082 return null;
083 }
084
085 return $summary;
086 }
087
088 /**
089 * Attempts to rewind a message body and throws an exception on failure.
090 *
091 * The body of the message will only be rewound if a call to `tell()`
092 * returns a value other than `0`.
093 *
094 * @param MessageInterface $message Message to rewind
095 *
096 * @throws \RuntimeException
097 */
098 public static function rewindBody(MessageInterface $message)
099 {
100 $body = $message->getBody();
101
102 if ($body->tell()) {
103 $body->rewind();
104 }
105 }
106
107 /**
108 * Parses an HTTP message into an associative array.
109 *
110 * The array contains the "start-line" key containing the start line of
111 * the message, "headers" key containing an associative array of header
112 * array values, and a "body" key containing the body of the message.
113 *
114 * @param string $message HTTP request or response to parse.
115 *
116 * @return array
117 */
118 public static function parseMessage($message)
119 {
120 if (!$message) {
121 throw new \InvalidArgumentException('Invalid message');
122 }
123
124 $message = ltrim($message, "\r\n");
125
126 $messageParts = preg_split("/\r?\n\r?\n/", $message, 2);
127
128 if ($messageParts === false || count($messageParts) !== 2) {
129 throw new \InvalidArgumentException('Invalid message: Missing header delimiter');
130 }
131
132 list($rawHeaders, $body) = $messageParts;
133 $rawHeaders .= "\r\n"; // Put back the delimiter we split previously
134 $headerParts = preg_split("/\r?\n/", $rawHeaders, 2);
135
136 if ($headerParts === false || count($headerParts) !== 2) {
137 throw new \InvalidArgumentException('Invalid message: Missing status line');
138 }
139
140 list($startLine, $rawHeaders) = $headerParts;
141
142 if (preg_match("/(?:^HTTP\/|^[A-Z]+ \S+ HTTP\/)(\d+(?:\.\d+)?)/i", $startLine, $matches) && $matches[1] === '1.0') {
143 // Header folding is deprecated for HTTP/1.1, but allowed in HTTP/1.0
144 $rawHeaders = preg_replace(Rfc7230::HEADER_FOLD_REGEX, ' ', $rawHeaders);
145 }
146
147 /** @var array[] $headerLines */
148 $count = preg_match_all(Rfc7230::HEADER_REGEX, $rawHeaders, $headerLines, PREG_SET_ORDER);
149
150 // If these aren't the same, then one line didn't match and there's an invalid header.
151 if ($count !== substr_count($rawHeaders, "\n")) {
152 // Folding is deprecated, see https://tools.ietf.org/html/rfc7230#section-3.2.4
153 if (preg_match(Rfc7230::HEADER_FOLD_REGEX, $rawHeaders)) {
154 throw new \InvalidArgumentException('Invalid header syntax: Obsolete line folding');
155 }
156
157 throw new \InvalidArgumentException('Invalid header syntax');
158 }
159
160 $headers = [];
161
162 foreach ($headerLines as $headerLine) {
163 $headers[$headerLine[1]][] = $headerLine[2];
164 }
165
166 return [
167 'start-line' => $startLine,
168 'headers' => $headers,
169 'body' => $body,
170 ];
171 }
172
173 /**
174 * Constructs a URI for an HTTP request message.
175 *
176 * @param string $path Path from the start-line
177 * @param array $headers Array of headers (each value an array).
178 *
179 * @return string
180 */
181 public static function parseRequestUri($path, array $headers)
182 {
183 $hostKey = array_filter(array_keys($headers), function ($k) {
184 return strtolower($k) === 'host';
185 });
186
187 // If no host is found, then a full URI cannot be constructed.
188 if (!$hostKey) {
189 return $path;
190 }
191
192 $host = $headers[reset($hostKey)][0];
193 $scheme = substr($host, -4) === ':443' ? 'https' : 'http';
194
195 return $scheme . '://' . $host . '/' . ltrim($path, '/');
196 }
197
198 /**
199 * Parses a request message string into a request object.
200 *
201 * @param string $message Request message string.
202 *
203 * @return Request
204 */
205 public static function parseRequest($message)
206 {
207 $data = self::parseMessage($message);
208 $matches = [];
209 if (!preg_match('/^[\S]+\s+([a-zA-Z]+:\/\/|\/).*/', $data['start-line'], $matches)) {
210 throw new \InvalidArgumentException('Invalid request string');
211 }
212 $parts = explode(' ', $data['start-line'], 3);
213 $version = isset($parts[2]) ? explode('/', $parts[2])[1] : '1.1';
214
215 $request = new Request(
216 $parts[0],
217 $matches[1] === '/' ? self::parseRequestUri($parts[1], $data['headers']) : $parts[1],
218 $data['headers'],
219 $data['body'],
220 $version
221 );
222
223 return $matches[1] === '/' ? $request : $request->withRequestTarget($parts[1]);
224 }
225
226 /**
227 * Parses a response message string into a response object.
228 *
229 * @param string $message Response message string.
230 *
231 * @return Response
232 */
233 public static function parseResponse($message)
234 {
235 $data = self::parseMessage($message);
236 // According to https://tools.ietf.org/html/rfc7230#section-3.1.2 the space
237 // between status-code and reason-phrase is required. But browsers accept
238 // responses without space and reason as well.
239 if (!preg_match('/^HTTP\/.* [0-9]{3}( .*|$)/', $data['start-line'])) {
240 throw new \InvalidArgumentException('Invalid response string: ' . $data['start-line']);
241 }
242 $parts = explode(' ', $data['start-line'], 3);
243
244 return new Response(
245 (int) $parts[1],
246 $data['headers'],
247 $data['body'],
248 explode('/', $parts[0])[1],
249 isset($parts[2]) ? $parts[2] : null
250 );
251 }
252 }
253