$remaining = 0;
// Loop over each and every byte, and set $value to its value
for ($i = 1, $len = count($bytes); $i < $len; $i++) {
$value = hexdec($bytes[$i]);
// If we're the first byte of sequence:
if (!$remaining) {
// Start position
$start = $i;
// By default we are valid
$valid = true;
// One byte sequence:
if ($value <= 0x7F) {
$character = $value;
$length = 1;
}
// Two byte sequence:
elseif (($value & 0xE0) === 0xC0) {
$character = ($value & 0x1F) << 6;
$length = 2;
$remaining = 1;
}
// Three byte sequence:
elseif (($value & 0xF0) === 0xE0) {
$character = ($value & 0x0F) << 12;
$length = 3;
$remaining = 2;
}
// Four byte sequence:
elseif (($value & 0xF8) === 0xF0) {
$character = ($value & 0x07) << 18;
$length = 4;
$remaining = 3;
}
// Invalid byte:
else {
$valid = false;
$remaining = 0;
}
}
// Continuation byte:
else {
// Check that the byte is valid, then add it to the character:
if (($value & 0xC0) === 0x80) {
$remaining--;
$character |= ($value & 0x3F) << ($remaining * 6);
}
// If it is invalid, count the sequence as invalid and reprocess the current byte as the start of a sequence:
else {
$valid = false;
$remaining = 0;
$i--;
}
}
// If we've reached the end of the current byte sequence, append it to Unicode::$data
if (!$remaining) {
// Percent encode anything invalid or not in iunreserved
if (
// Invalid sequences
!$valid
// Non-shortest form sequences are invalid
|| $length > 1 && $character <= 0x7F
|| $length > 2 && $character <= 0x7FF
|| $length > 3 && $character <= 0xFFFF
// Outside of range of iunreserved codepoints
|| $character < 0x2D
|| $character > 0xEFFFD
// Noncharacters
|| ($character & 0xFFFE) === 0xFFFE
|| $character >= 0xFDD0 && $character <= 0xFDEF
// Everything else not in iunreserved (this is all BMP)
|| $character === 0x2F
|| $character > 0x39 && $character < 0x41
|| $character > 0x5A && $character < 0x61
|| $character > 0x7A && $character < 0x7E
|| $character > 0x7E && $character < 0xA0
|| $character > 0xD7FF && $character < 0xF900
) {
for ($j = $start; $j <= $i; $j++) {
$string .= '%' . strtoupper($bytes[$j]);
}
}
else {
for ($j = $start; $j <= $i; $j++) {
$string .= chr(hexdec($bytes[$j]));
}
}
}
}
// If we have any bytes left over they are invalid (i.e., we are
// mid-way through a multi-byte sequence)
if ($remaining) {
for ($j = $start; $j < $len; $j++) {
$string .= '%' . strtoupper($bytes[$j]);
}
}
return $string;
}
protected function scheme_normalization() {
if (isset($this->normalization[$this->scheme]['iuserinfo']) && $this->iuserinfo === $this->normalization[$this->scheme]['iuserinfo']) {
$this->iuserinfo = null;
}
if (isset($this->normalization[$this->scheme]['ihost']) && $this->ihost === $this->normalization[$this->scheme]['ihost']) {
$this->ihost = null;
}
if (isset($this->normalization[$this->scheme]['port']) && $this->port === $this->normalization[$this->scheme]['port']) {
$this->port = null;
}
if (isset($this->normalization[$this->scheme]['ipath']) && $this->ipath === $this->normalization[$this->scheme]['ipath']) {
$this->ipath = '';
}
if (isset($this->ihost) && empty($this->ipath)) {
$this->ipath = '/';
}
if (isset($this->normalization[$this->scheme]['iquery']) && $this->iquery === $this->normalization[$this->scheme]['iquery']) {
$this->iquery = null;
}
if (isset($this->normalization[$this->scheme]['ifragment']) && $this->ifragment === $this->normalization[$this->scheme]['ifragment']) {
$this->ifragment = null;
}
}
/**
* Check if the object represents a valid IRI. This needs to be done on each
* call as some things change depending on another part of the IRI.
*
* @return bool
*/
public function is_valid() {
$isauthority = $this->iuserinfo !== null || $this->ihost !== null || $this->port !== null;
if ($this->ipath !== '' &&
(
$isauthority && $this->ipath[0] !== '/' ||
(
$this->scheme === null &&
!$isauthority &&
strpos($this->ipath, ':') !== false &&
(strpos($this->ipath, '/') === false ? true : strpos($this->ipath, ':') < strpos($this->ipath, '/'))
)
)
) {
return false;
}
return true;
}
public function __wakeup() {
$class_props = get_class_vars( __CLASS__ );
$string_props = array( 'scheme', 'iuserinfo', 'ihost', 'port', 'ipath', 'iquery', 'ifragment' );
$array_props = array( 'normalization' );
foreach ( $class_props as $prop => $default_value ) {
if ( in_array( $prop, $string_props, true ) && ! is_string( $this->$prop ) ) {
throw new UnexpectedValueException();
} elseif ( in_array( $prop, $array_props, true ) && ! is_array( $this->$prop ) ) {
throw new UnexpectedValueException();
}
$this->$prop = null;
}
}
/**
* Set the entire IRI. Returns true on success, false on failure (if there
* are any invalid characters).
*
* @param string $iri
* @return bool
*/
protected function set_iri($iri) {
static $cache;
if (!$cache) {
$cache = array();
}
if ($iri === null) {
return true;
}
$iri = (string) $iri;
if (isset($cache[$iri])) {
list($this->scheme,
$this->iuserinfo,
$this->ihost,
$this->port,
$this->ipath,
$this->iquery,
$this->ifragment,
$return) = $cache[$iri];
return $return;
}
$parsed = $this->parse_iri($iri);
$return = $this->set_scheme($parsed['scheme'])
&& $this->set_authority($parsed['authority'])
&& $this->set_path($parsed['path'])
&& $this->set_query($parsed['query'])
&& $this->set_fragment($parsed['fragment']);
$cache[$iri] = array($this->scheme,
$this->iuserinfo,
$this->ihost,
$this->port,
$this->ipath,
$this->iquery,
$this->ifragment,
$return);
return $return;
}
/**
* Set the scheme. Returns true on success, false on failure (if there are
* any invalid characters).
*
* @param string $scheme
* @return bool
*/
protected function set_scheme($scheme) {
if ($scheme === null) {
$this->scheme = null;
}
elseif (!preg_match('/^[A-Za-z][0-9A-Za-z+\-.]*$/', $scheme)) {
$this->scheme = null;
return false;
}
else {
$this->scheme = strtolower($scheme);
}
return true;
}
/**
* Set the authority. Returns true on success, false on failure (if there are
* any invalid characters).
*
* @param string $authority
* @return bool
*/
protected function set_authority($authority) {
static $cache;
if (!$cache) {
$cache = array();
}
if ($authority === null) {
$this->iuserinfo = null;
$this->ihost = null;
$this->port = null;
return true;
}
if (isset($cache[$authority])) {
list($this->iuserinfo,
$this->ihost,
$this->port,
$return) = $cache[$authority];
return $return;
}
$remaining = $authority;
if (($iuserinfo_end = strrpos($remaining, '@')) !== false) {
$iuserinfo = substr($remaining, 0, $iuserinfo_end);
$remaining = substr($remaining, $iuserinfo_end + 1);
}
else {
$iuserinfo = null;
}
if (($port_start = strpos($remaining, ':', (strpos($remaining, ']') ?: 0))) !== false) {
$port = substr($remaining, $port_start + 1);
if ($port === false || $port === '') {
$port = null;
}
$remaining = substr($remaining, 0, $port_start);
}
else {
$port = null;
}
$return = $this->set_userinfo($iuserinfo) &&
$this->set_host($remaining) &&
$this->set_port($port);
$cache[$authority] = array($this->iuserinfo,
$this->ihost,
$this->port,
$return);
return $return;
}
/**
* Set the iuserinfo.
*
* @param string $iuserinfo
* @return bool
*/
protected function set_userinfo($iuserinfo) {
if ($iuserinfo === null) {
$this->iuserinfo = null;
}
else {
$this->iuserinfo = $this->replace_invalid_with_pct_encoding($iuserinfo, '!$&\'()*+,;=:');
$this->scheme_normalization();
}
return true;
}
/**
* Set the ihost. Returns true on success, false on failure (if there are
* any invalid characters).
*
* @param string $ihost
* @return bool
*/
protected function set_host($ihost) {
if ($ihost === null) {
$this->ihost = null;
return true;
}
if (substr($ihost, 0, 1) === '[' && substr($ihost, -1) === ']') {
if (Ipv6::check_ipv6(substr($ihost, 1, -1))) {
$this->ihost = '[' . Ipv6::compress(substr($ihost, 1, -1)) . ']';
}
else {
$this->ihost = null;
return false;
}
}
else {
$ihost = $this->replace_invalid_with_pct_encoding($ihost, '!$&\'()*+,;=');
// Lowercase, but ignore pct-encoded sections (as they should
// remain uppercase). This must be done after the previous step
// as that can add unescaped characters.
$position = 0;
$strlen = strlen($ihost);
while (($position += strcspn($ihost, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ%', $position)) < $strlen) {
if ($ihost[$position] === '%') {
$position += 3;
}
else {
$ihost[$position] = strtolower($ihost[$position]);
$position++;
}
}
$this->ihost = $ihost;
}
$this->scheme_normalization();
return true;
}
/**
* Set the port. Returns true on success, false on failure (if there are
* any invalid characters).
*
* @param string $port
* @return bool
*/
protected function set_port($port) {
if ($port === null) {
$this->port = null;
return true;
}
if (strspn($port, '0123456789') === strlen($port)) {
$this->port = (int) $port;
$this->scheme_normalization();
return true;
}
$this->port = null;
return false;
}
/**
* Set the ipath.
*
* @param string $ipath
* @return bool
*/
protected function set_path($ipath) {
static $cache;
if (!$cache) {
$cache = array();
}
$ipath = (string) $ipath;
if (isset($cache[$ipath])) {
$this->ipath = $cache[$ipath][(int) ($this->scheme !== null)];
}
else {
$valid = $this->replace_invalid_with_pct_encoding($ipath, '!$&\'()*+,;=@:/');
$removed = $this->remove_dot_segments($valid);
$cache[$ipath] = array($valid, $removed);
$this->ipath = ($this->scheme !== null) ? $removed : $valid;
}
$this->scheme_normalization();
return true;
}
/**
* Set the iquery.
*
* @param string $iquery
* @return bool
*/
protected function set_query($iquery) {
if ($iquery === null) {
$this->iquery = null;
}
else {
$this->iquery = $this->replace_invalid_with_pct_encoding($iquery, '!$&\'()*+,;=:@/?', true);
$this->scheme_normalization();
}
return true;
}
/**
* Set the ifragment.
*
* @param string $ifragment
* @return bool
*/
protected function set_fragment($ifragment) {
if ($ifragment === null) {
$this->ifragment = null;
}
else {
$this->ifragment = $this->replace_invalid_with_pct_encoding($ifragment, '!$&\'()*+,;=:@/?');
$this->scheme_normalization();
}
return true;
}
/**
* Convert an IRI to a URI (or parts thereof)
*
* @param string|bool $iri IRI to convert (or false from {@see \WpOrg\Requests\Iri::get_iri()})
* @return string|false URI if IRI is valid, false otherwise.
*/
protected function to_uri($iri) {
if (!is_string($iri)) {
return false;
}
static $non_ascii;
if (!$non_ascii) {
$non_ascii = implode('', range("\x80", "\xFF"));
}
$position = 0;
$strlen = strlen($iri);
while (($position += strcspn($iri, $non_ascii, $position)) < $strlen) {
$iri = substr_replace($iri, sprintf('%%%02X', ord($iri[$position])), $position, 1);
$position += 3;
$strlen += 2;
}
return $iri;
}
/**
* Get the complete IRI
*
* @return string|false
*/
protected function get_iri() {
if (!$this->is_valid()) {
return false;
}
$iri = '';
if ($this->scheme !== null) {
$iri .= $this->scheme . ':';
}
if (($iauthority = $this->get_iauthority()) !== null) {
$iri .= '//' . $iauthority;
}
$iri .= $this->ipath;
if ($this->iquery !== null) {
$iri .= '?' . $this->iquery;
}
if ($this->ifragment !== null) {
$iri .= '#' . $this->ifragment;
}
return $iri;
}
/**
* Get the complete URI
*
* @return string
*/
protected function get_uri() {
return $this->to_uri($this->get_iri());
}
/**
* Get the complete iauthority
*
* @return string|null
*/
protected function get_iauthority() {
if ($this->iuserinfo === null && $this->ihost === null && $this->port === null) {
return null;
}
$iauthority = '';
if ($this->iuserinfo !== null) {
$iauthority .= $this->iuserinfo . '@';
}
if ($this->ihost !== null) {
$iauthority .= $this->ihost;
}
if ($this->port !== null) {
$iauthority .= ':' . $this->port;
}
return $iauthority;
}
/**
* Get the complete authority
*
* @return string
*/
protected function get_authority() {
$iauthority = $this->get_iauthority();
if (is_string($iauthority)) {
return $this->to_uri($iauthority);
}
else {
return $iauthority;
}
}
}
