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home/tarafhaber/public_html/wp-includes/SimplePie/src/HTTP/Parser.php 0000644 00000035073 15010601024 0021526 0 ustar 00 data = $data;
$this->data_length = strlen($this->data);
}
/**
* Parse the input data
*
* @return bool true on success, false on failure
*/
public function parse()
{
while ($this->state && $this->state !== self::STATE_EMIT && $this->has_data()) {
$state = $this->state;
$this->$state();
}
$this->data = '';
if ($this->state === self::STATE_EMIT || $this->state === self::STATE_BODY) {
return true;
}
$this->http_version = '';
$this->status_code = 0;
$this->reason = '';
$this->headers = [];
$this->body = '';
return false;
}
/**
* Check whether there is data beyond the pointer
*
* @return bool true if there is further data, false if not
*/
protected function has_data()
{
return (bool) ($this->position < $this->data_length);
}
/**
* See if the next character is LWS
*
* @return bool true if the next character is LWS, false if not
*/
protected function is_linear_whitespace()
{
return (bool) ($this->data[$this->position] === "\x09"
|| $this->data[$this->position] === "\x20"
|| ($this->data[$this->position] === "\x0A"
&& isset($this->data[$this->position + 1])
&& ($this->data[$this->position + 1] === "\x09" || $this->data[$this->position + 1] === "\x20")));
}
/**
* Parse the HTTP version
*/
protected function http_version()
{
if (strpos($this->data, "\x0A") !== false && strtoupper(substr($this->data, 0, 5)) === 'HTTP/') {
$len = strspn($this->data, '0123456789.', 5);
$this->http_version = substr($this->data, 5, $len);
$this->position += 5 + $len;
if (substr_count($this->http_version, '.') <= 1) {
$this->http_version = (float) $this->http_version;
$this->position += strspn($this->data, "\x09\x20", $this->position);
$this->state = self::STATE_STATUS;
} else {
$this->state = self::STATE_ERROR;
}
} else {
$this->state = self::STATE_ERROR;
}
}
/**
* Parse the status code
*/
protected function status()
{
if ($len = strspn($this->data, '0123456789', $this->position)) {
$this->status_code = (int) substr($this->data, $this->position, $len);
$this->position += $len;
$this->state = self::STATE_REASON;
} else {
$this->state = self::STATE_ERROR;
}
}
/**
* Parse the reason phrase
*/
protected function reason()
{
$len = strcspn($this->data, "\x0A", $this->position);
$this->reason = trim(substr($this->data, $this->position, $len), "\x09\x0D\x20");
$this->position += $len + 1;
$this->state = self::STATE_NEW_LINE;
}
/**
* Deal with a new line, shifting data around as needed
*/
protected function new_line()
{
$this->value = trim($this->value, "\x0D\x20");
if ($this->name !== '' && $this->value !== '') {
$this->name = strtolower($this->name);
// We should only use the last Content-Type header. c.f. issue #1
if (isset($this->headers[$this->name]) && $this->name !== 'content-type') {
$this->headers[$this->name] .= ', ' . $this->value;
} else {
$this->headers[$this->name] = $this->value;
}
}
$this->name = '';
$this->value = '';
if (substr($this->data[$this->position], 0, 2) === "\x0D\x0A") {
$this->position += 2;
$this->state = self::STATE_BODY;
} elseif ($this->data[$this->position] === "\x0A") {
$this->position++;
$this->state = self::STATE_BODY;
} else {
$this->state = self::STATE_NAME;
}
}
/**
* Parse a header name
*/
protected function name()
{
$len = strcspn($this->data, "\x0A:", $this->position);
if (isset($this->data[$this->position + $len])) {
if ($this->data[$this->position + $len] === "\x0A") {
$this->position += $len;
$this->state = self::STATE_NEW_LINE;
} else {
$this->name = substr($this->data, $this->position, $len);
$this->position += $len + 1;
$this->state = self::STATE_VALUE;
}
} else {
$this->state = self::STATE_ERROR;
}
}
/**
* Parse LWS, replacing consecutive LWS characters with a single space
*/
protected function linear_whitespace()
{
do {
if (substr($this->data, $this->position, 2) === "\x0D\x0A") {
$this->position += 2;
} elseif ($this->data[$this->position] === "\x0A") {
$this->position++;
}
$this->position += strspn($this->data, "\x09\x20", $this->position);
} while ($this->has_data() && $this->is_linear_whitespace());
$this->value .= "\x20";
}
/**
* See what state to move to while within non-quoted header values
*/
protected function value()
{
if ($this->is_linear_whitespace()) {
$this->linear_whitespace();
} else {
switch ($this->data[$this->position]) {
case '"':
// Workaround for ETags: we have to include the quotes as
// part of the tag.
if (strtolower($this->name) === 'etag') {
$this->value .= '"';
$this->position++;
$this->state = self::STATE_VALUE_CHAR;
break;
}
$this->position++;
$this->state = self::STATE_QUOTE;
break;
case "\x0A":
$this->position++;
$this->state = self::STATE_NEW_LINE;
break;
default:
$this->state = self::STATE_VALUE_CHAR;
break;
}
}
}
/**
* Parse a header value while outside quotes
*/
protected function value_char()
{
$len = strcspn($this->data, "\x09\x20\x0A\"", $this->position);
$this->value .= substr($this->data, $this->position, $len);
$this->position += $len;
$this->state = self::STATE_VALUE;
}
/**
* See what state to move to while within quoted header values
*/
protected function quote()
{
if ($this->is_linear_whitespace()) {
$this->linear_whitespace();
} else {
switch ($this->data[$this->position]) {
case '"':
$this->position++;
$this->state = self::STATE_VALUE;
break;
case "\x0A":
$this->position++;
$this->state = self::STATE_NEW_LINE;
break;
case '\\':
$this->position++;
$this->state = self::STATE_QUOTE_ESCAPED;
break;
default:
$this->state = self::STATE_QUOTE_CHAR;
break;
}
}
}
/**
* Parse a header value while within quotes
*/
protected function quote_char()
{
$len = strcspn($this->data, "\x09\x20\x0A\"\\", $this->position);
$this->value .= substr($this->data, $this->position, $len);
$this->position += $len;
$this->state = self::STATE_VALUE;
}
/**
* Parse an escaped character within quotes
*/
protected function quote_escaped()
{
$this->value .= $this->data[$this->position];
$this->position++;
$this->state = self::STATE_QUOTE;
}
/**
* Parse the body
*/
protected function body()
{
$this->body = substr($this->data, $this->position);
if (!empty($this->headers['transfer-encoding'])) {
unset($this->headers['transfer-encoding']);
$this->state = self::STATE_CHUNKED;
} else {
$this->state = self::STATE_EMIT;
}
}
/**
* Parsed a "Transfer-Encoding: chunked" body
*/
protected function chunked()
{
if (!preg_match('/^([0-9a-f]+)[^\r\n]*\r\n/i', trim($this->body))) {
$this->state = self::STATE_EMIT;
return;
}
$decoded = '';
$encoded = $this->body;
while (true) {
$is_chunked = (bool) preg_match('/^([0-9a-f]+)[^\r\n]*\r\n/i', $encoded, $matches);
if (!$is_chunked) {
// Looks like it's not chunked after all
$this->state = self::STATE_EMIT;
return;
}
$length = hexdec(trim($matches[1]));
if ($length === 0) {
// Ignore trailer headers
$this->state = self::STATE_EMIT;
$this->body = $decoded;
return;
}
$chunk_length = strlen($matches[0]);
$decoded .= substr($encoded, $chunk_length, $length);
$encoded = substr($encoded, $chunk_length + $length + 2);
// BC for PHP < 8.0: substr() can return bool instead of string
$encoded = ($encoded === false) ? '' : $encoded;
if (trim($encoded) === '0' || empty($encoded)) {
$this->state = self::STATE_EMIT;
$this->body = $decoded;
return;
}
}
}
/**
* Prepare headers (take care of proxies headers)
*
* @param string $headers Raw headers
* @param integer $count Redirection count. Default to 1.
*
* @return string
*/
public static function prepareHeaders($headers, $count = 1)
{
$data = explode("\r\n\r\n", $headers, $count);
$data = array_pop($data);
if (false !== stripos($data, "HTTP/1.0 200 Connection established\r\n")) {
$exploded = explode("\r\n\r\n", $data, 2);
$data = end($exploded);
}
if (false !== stripos($data, "HTTP/1.1 200 Connection established\r\n")) {
$exploded = explode("\r\n\r\n", $data, 2);
$data = end($exploded);
}
return $data;
}
}
class_alias('SimplePie\HTTP\Parser', 'SimplePie_HTTP_Parser');