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Initial commit with a few states; not yet tested

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J. King 2018-04-08 20:10:17 -04:00
commit 9786d25aa5
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7
.gitattributes vendored Normal file
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* text=auto encoding=utf-8
*.html diff=html
*.php diff=php
*.bat eol=crlf
*.cmd eol=crlf
.gitignore -eol

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.gitignore vendored Normal file
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vendor
# Windows files
Thumbs.db
ehthumbs.db
Desktop.ini
$RECYCLE.BIN/
# macOS files
.DS_Store
.AppleDouble
.LSOverride
Icon
._*
.Spotlight-V100
.Trashes
# archives
*.zip
*.7z
*.tar.gz
*.tgz
*.deb
*.rpm
*.dmg
*.cab
*.msi
*.msm
*.msp

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composer.json Normal file
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{
"name": "jkingweb/uniform",
"type": "library",
"description": "A collection of URL tools compatible with the WHATWG URL standard",
"keywords": ["url","uri","whatwg"],
"license": "MIT",
"authors": [
{
"name": "J. King",
"email": "jking@jkingweb.ca",
"homepage": "https://jkingweb.ca/"
}
],
"require": {
"php": "^7.0"
},
"autoload": {
"psr-4": {
"JKingWeb\\URI\\": "lib/"
}
}
}

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composer.lock generated Normal file
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{
"_readme": [
"This file locks the dependencies of your project to a known state",
"Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
"This file is @generated automatically"
],
"content-hash": "9c891512410ea881b9cf5ae2a3873fcb",
"packages": [],
"packages-dev": [],
"aliases": [],
"minimum-stability": "stable",
"stability-flags": [],
"prefer-stable": false,
"prefer-lowest": false,
"platform": {
"php": "^7.0"
},
"platform-dev": []
}

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lib/URI.php Normal file
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<?php
/** @license MIT
* Copyright 2018 J. King et al.
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace JKingWeb\URI;
class URI {
/** List of "special" schemes and their default port numbers */
const SCHEME_SPECIAL = [
'ftp' => 21,
'file' => null,
'gopher' => 70,
'http' => 80,
'https' => 443,
'ws' => 80,
'wss' => 443,
];
/** Default port numbers for all schemes registered with IANA
*
* If a scheme is in the IANA registry but not listed here, then it likely did not exist when this list was last compiled
*/
const SCHEME_DEFAULT_PORTS = [
'aaa' => 3868,
'aaas' => 5658,
'about' => null,
'acap' => 674,
'acct' => null,
'acr' => null,
'adiumxtra' => null,
'afp' => 548,
'afs' => null,
'aim' => null,
'appdata' => null,
'apt' => null,
'attachment' => null,
'aw' => null,
'barion' => null,
'beshare' => null, // multiple ports
'bitcoin' => null,
'blob' => null,
'bolo' => null,
'browserext' => null,
'callto' => null,
'cap' => 1026,
'chrome' => null,
'chrome-extension' => null,
'cid' => null,
'coap' => 5683,
'coap+tcp' => 5683,
'coap+ws' => null, // it's unclear which port applies here: WebSocket would imply 80, but the specification is ambiguous
'coaps' => 5684,
'coaps+tcp' => 5684,
'coaps+ws' => null, // it's unclear which port applies here: WebSocket would imply 443, but the specification is ambiguous
'com-eventbrite-attendee' => null,
'content' => null,
'conti' => null,
'crid' => null,
'cvs' => null,
'data' => null,
'dav' => null,
'diaspora' => null,
'dict' => 2628,
'dis' => null,
'dlna-playcontainer' => null,
'dlna-playsingle' => null,
'dns' => 53,
'dntp' => null,
'dtn' => null,
'dvb' => null,
'ed2k' => null,
'example' => null, // not an actual scheme
'facetime' => null,
'fax' => null,
'feed' => null,
'feedready' => null,
'file' => null,
'filesystem' => null,
'finger' => 79,
'fish' => 22, // an application of SSH
'ftp' => 21,
'geo' => null,
'gg' => null,
'git' => 9418, // per https://git-scm.com/book/en/v2/Git-on-the-Server-The-Protocols#_the_git_protocol
'gizmoproject' => null,
'go' => 1096,
'gopher' => 70,
'graph' => null,
'graphdata' => null, // not in the IANA list, but included as part of the registration for 'graph'
'gtalk' => null,
'h323' => null, // several ports are defined in the IANA port registry---unclear which (if any) is implied by the scheme
'ham' => null,
'hcp' => null,
'http' => 80,
'https' => 443,
'hxxp' => null, // it would be inappropriate to modify these URLs
'hxxps' => null, // it would be inappropriate to modify these URLs
'hydrazone' => null,
'iax' => null,
'icap' => 1344,
'icon' => null,
'im' => null,
'imap' => 143,
'info' => null,
'iotdisco' => null,
'ipn' => null,
'ipp' => 631,
'ipps' => 631,
'irc' => 6667,
'irc6' => 6667,
'ircs' => 994,
'iris' => null,
'iris.beep' => null,
'iris.lwz' => null,
'iris.xpc' => null,
'iris.xpcs' => null,
'isostore' => null,
'itms' => null,
'jabber' => null,
'jar' => null,
'jms' => null,
'keyparc' => null,
'lastfm' => null,
'ldap' => 389,
'ldaps' => 636,
'lvlt' => null,
'magnet' => null,
'mailserver' => null,
'mailto' => null,
'maps' => null,
'market' => null,
'message' => null,
'microsoft.windows.camera' => null,
'microsoft.windows.camera.multipicker' => null,
'microsoft.windows.camera.picker' => null,
'mid' => null,
'mms' => null,
'modem' => null,
'mongodb' => null,
'moz' => null,
'ms-access' => null,
'ms-browser-extension' => null,
'ms-drive-to' => null,
'ms-enrollment' => null,
'ms-excel' => null,
'ms-gamebarservices' => null,
'ms-gamingoverlay' => null,
'ms-getoffice' => null,
'ms-help' => null,
'ms-infopath' => null,
'ms-inputapp' => null,
'ms-lockscreencomponent-config' => null,
'ms-media-stream-id' => null,
'ms-mixedrealitycapture' => null,
'ms-officeapp' => null,
'ms-people' => null,
'ms-project' => null,
'ms-powerpoint' => null,
'ms-publisher' => null,
'ms-restoretabcompanion' => null,
'ms-search-repair' => null,
'ms-secondary-screen-controller' => null,
'ms-secondary-screen-setup' => null,
// what the hell, Microsoft? Seriously?
'ms-settings' => null,
'ms-settings-airplanemode' => null,
'ms-settings-bluetooth' => null,
'ms-settings-camera' => null,
'ms-settings-cellular' => null,
'ms-settings-cloudstorage' => null,
'ms-settings-connectabledevices' => null,
'ms-settings-displays-topology' => null,
'ms-settings-emailandaccounts' => null,
'ms-settings-language' => null,
'ms-settings-location' => null,
'ms-settings-lock' => null,
'ms-settings-nfctransactions' => null,
'ms-settings-notifications' => null,
'ms-settings-power' => null,
'ms-settings-privacy' => null,
'ms-settings-proximity' => null,
'ms-settings-screenrotation' => null,
'ms-settings-wifi' => null,
'ms-settings-workplace' => null,
// You could have just defined one ms-app scheme, you know, never mind one ms-settings...
'ms-spd' => null,
'ms-sttoverlay' => null,
'ms-transit-to' => null,
'ms-useractivityset' => null,
'ms-virtualtouchpad' => null,
'ms-visio' => null,
'ms-walk-to' => null,
'ms-whiteboard' => null,
'ms-whiteboard-cmd' => null,
'ms-word' => null,
'msnim' => null,
'msrp' => null, // explicitly no default port
'msrps' => null, // explicitly no default port
'mtqp' => 1038,
'mumble' => 64738,
'mupdate' => null,
'mvn' => null,
'news' => 119,
'nfs' => 2049,
'ni' => null,
'nih' => null,
'nntp' => 119,
'notes' => null,
'ocf' => null,
'oid' => null,
'onenote' => null,
'onenote-cmd' => null,
'opaquelocktoken' => null,
'pack' => null,
'palm' => null,
'paparazzi' => null,
'pkcs11' => null,
'platform' => null,
'pop' => 110,
'pres' => null,
'prospero' => 1525,
'proxy' => null,
'pwid' => null,
'psyc' => 4404,
'qb' => null,
'query' => null,
'redis' => 6379,
'rediss' => 6379,
'reload' => 6084,
'res' => null,
'resource' => null,
'rmi' => 1099,
'rsync' => 873,
'rtmfp' => 1935,
'rtmp' => 1935,
'rtsp' => 554,
'rtsps' => 322,
'rtspu' => 554,
'secondlife' => null,
'service' => null,
'session' => null,
'sftp' => 22, // application of SSH
'sgn' => null,
'shttp' => 80,
'sieve' => 4190,
'sip' => 5060,
'sips' => 5061,
'skype' => null,
'smb' => 445,
'sms' => null,
'smtp' => 25,
'snews' => 563,
'snmp' => 161,
'soap.beep' => null, // explicit port bypasses SRV lookups
'soap.beeps' => null, // explicit port bypasses SRV lookups
'soldat' => null, // port required
'spiffe' => null, // ports are not used
'spotify' => null,
'ssh' => 22,
'steam' => null,
'stun' => null,
'stuns' => null,
'submit' => 587, // SMTP submission
'svn' => null,
'tag' => null,
'teamspeak' => 8767,
'tel' => null,
'teliaeid' => null,
'telnet' => 23,
'tftp' => 69,
'things' => null,
'thismessage' => null, // not an actual scheme
'tip' => 3372,
'tn3270' => 23,
'tool' => null,
'turn' => 3478,
'turns' => 5349,
'tv' => null,
'udp' => null, // multiple independent uses
'unreal' => 7777, // assumed based on Unreal Tournament
'urn' => null,
'ut2004' => 7777,
'v-event' => null,
'vemmi' => 575,
'ventrilo' => 3784,
'videotex' => 516,
'vnc' => 5900,
'view-source' => null,
'wais' => 210,
'webcal' => null, // unclear if port 80 or 443 should be assumed
'wpid' => null, // alias of pwid
'ws' => 80,
'wss' => 443,
'wtai' => null,
'wyciwyg' => null,
'xcon' => null, // not resolvable
'xcon-userid' => null,
'xfire' => null,
'xmlrpc.beep' => null, // explicit port bypasses SRV lookups
'xmlrpc.beeps' => null, // explicit port bypasses SRV lookups
'xmpp' => null,
'xri' => null, // unclear; historical
'ymsgr' => null,
'z39.50' => 210,
'z39.50r' => 210,
'z39.50s' => 210,
];
/**
* List of schemes which use locator syntax when they are actually names
*
* If a scheme has no documentation or examples at all, it is assumed to be among these schemes
*/
const SCHEME_NONSTANDARD = [
"diaspora",
"dvb",
"ed2k",
"facetime",
"gizmoproject",
"hcp",
"hydrazone",
"keyparc",
"lastfm",
"market",
"mongodb", // more than one host can be specified, which is non-standard
"moz", // no documentation
"moz-icon", // not in the IANA registry; equivalent to 'icon'
"ms-enrollment",
"ms-gamebarservices", // no documentation
"ms-gamingoverlay", // no documentation
"ms-getoffice", // no documentation
"ms-help",
"ms-inputapp", // no documentation
"ms-lockscreencomponent-config", // no documentation
"ms-mixedrealitycapture",
"ms-officeapp",
"ms-restoretabcompanion",
"ms-sttoverlay",
"ms-useractivityset",
"ms-whiteboard",
"ms-whiteboard-cmd",
"ms-windows-store", // not in the IANA registry; documentation shows it uses incorrect syntax
"notes",
"onenote-cmd",
"pack",
"psyc", // authority section is non-standard
"qb", // no documentation
"res",
"resource",
"teliaeid",
"wtai",
"wyciwyg",
];
// character class identifiers
const CHR_C0 = 1;
const CHR_C0_OR_SPACE = 2;
const CHR_ASCII_ALPHA = 3;
const CHR_ASCII_ALPHANUM = 4;
// error condition identifiers
const ERR_LEADING_OR_TRAILING_WS = 1;
const ERR_EMBEDDED_NEWLINE_OR_TAB = 2;
const ERR_INVALID_SCHEME_CHAR = 3;
const ERR_FILE_SCHEME_EXPECTING_DOUBLE_SLASH = 4;
const ERR_RELATIVE_URL = 5;
// parser state identifiers
const ST_SCHEME_START = 1;
const ST_SCHEME = 2;
const ST_NO_SCHEME = 3;
const ST_FILE = 4;
const ST_SPECIAL_RELATIVE_OR_AUTHORITY = 5;
const ST_SPECIAL_AUTHORITY_SLASHES = 6;
const ST_PATH_OR_AUTHORITY = 7;
const ST_CANNOT_BE_A_BASE_URL_PATH = 8;
const ST_FRAGMENT = 9;
const ST_RELATIVE = 10;
const ST_SPECIAL_AUTHORITY_IGNORE_SLASHES = 11;
public static $confUseAllSchemePorts = false;
public $scheme = null;
public $path = [];
public $cannotBeBaseUrl = false;
public $err = [];
protected function basicUrlParser(string $input, self $base = null, string $encodingOverride = "", self $url = null, int $stateOverride = 0) {
$pointer = -1;
$pos = -1;
// start by getting the byte length of the input
// this will later function as a signal for end of input
// initially it also functions to show whether characters
// have been removed by stripping operations
$eof = strlen($input);
// begin algorithm
# If url is not given:
if (!$url) {
# Set url to a new URL.
$url = new self;
# Remove any leading and trailing C0 or space from input.
$input = trim($input, " \u{0}\u{1}\u{2}\u{3}\u{4}\u{5}\u{6}\u{7}\u{8}\u{9}\u{A}\u{B}\u{C}\u{D}\u{E}\u{F}\u{10}\u{11}\u{12}\u{13}\u{14}\u{15}\u{16}\u{17}\u{18}\u{19}\u{1A}\u{1B}\u{1C}\u{1D}\u{1E}\u{1F}");
# If input contains any leading or trailing C0 control or space, validation error.
if (strlen($input) != $oef) {
$url->err[] = [$pointer, $pos, self::ERR_LEADING_OR_TRAILING_WS];
$eof = strlen($input);
}
}
# Remove all ASCII tab or newline from input.
$input = str_replace(["\r", "\n", "\t",], "", $input);
# If input contains any ASCII tab or newline, validation error.
if (strlen($input) != $oef) {
$url->err[] = [$pointer, $pos, self::ERR_EMBEDDED_NEWLINE_OR_TAB];
$eof = strlen($input);
}
# Let state be state override if given, or scheme start state otherwise.
$state = $stateOverride ?? self::ST_SCHEME_START;
# Let encoding be UTF-8. If encoding override is given, set encoding to the result of getting an output encoding from encoding override.
$encoding = ($encodingOverride=="") ? "utf-8" : $this->getOutputEncoding($encodingOverride);
# Let buffer be the empty string.
$buffer = "";
# Let the @ flag, [] flag, and passwordTokenSeenFlag be unset.
$flagAtSign = $flagSquareBracket = $flagPasswordTokenSeen = false;
# Let pointer be a pointer to first code point in input.
// DEVIATION: we operate on byte strings: $pos is the byte offset of the character referred to by $pointer;
// $posPrev is the byte offset of the start of the previous character i.e. ($pointer - 1)
$pointer = 0;
$posPrev = $pos;
$pos = 0;
# Keep running the following state machine by switching on state.
# If after a run pointer points to the EOF code point, go to the next step.
# Otherwise, increase pointer by one and continue with the state machine.
do {
# Within a parser algorithm that uses a pointer variable, c references the code point the pointer variable points to.
// DEVIATION: we operate on byte strings: $pos is the byte offset of the character referred to by $pointer;
// $posNext is the start of "remaining" i.e. the offset of the next UTF-8 character
// $posPrev is the byte offset of the start of the previous character i.e. ($pointer - 1)
list($c, $posNext) = $this->getChar($input, $pos);
// switch on state
switch ($state) {
# scheme start state
case self::ST_SCHEME_START:
if ($this->isChr($c, self::CHR_ASCII_ALPHA)) {
# If c is an ASCII alpha, append c, lowercased, to buffer, and set state to scheme state.
$buffer .= strtolower($c);
$state = self::ST_SCHEME;
} elseif (!$stateOverride) {
# Otherwise, if state override is not given, set state to no scheme state, and decrease pointer by one.
$state = self::ST_NO_SCHEME;
$pos = $posPrev;
$pointer--;
} else {
# Otherwise, validation error, return failure.
# NOTE: This indication of failure is used exclusively by Location object’s protocol attribute.
$url->err[] = [$pointer, $pos, self::ERR_INVALID_SCHEME_CHAR];
$url->failure = true;
return $url;
}
break;
# scheme state
case self::ST_SCHEME:
if ($this->isChr($c, self::CHR_ASCII_ALPHANUM) || strpos("+-.", $c) !== false) {
# If c is an ASCII alphanumeric, U+002B (+), U+002D (-), or U+002E (.), append c, lowercased, to buffer.
$buffer .= strtolower($c);
} elseif ($c==":") {
# Otherwise, if c is U+003A (:), then:
# If state override is given, then:
if ($stateOverride &&
# If url’s scheme is a special scheme and buffer is not a special scheme, then return.
(array_key_exists($url->scheme, self::SCHEME_SPECIAL) && !array_key_exists($buffer, self::SCHEME_SPECIAL)) ||
# If url’s scheme is not a special scheme and buffer is a special scheme, then return.
(!array_key_exists($url->scheme, self::SCHEME_SPECIAL) && array_key_exists($buffer, self::SCHEME_SPECIAL)) ||
# If url includes credentials or has a non-null port, and buffer is "file", then return.
($buffer=="file" || !is_null($url->port) || strlen((string) $url->username) || strlen((string) $url->password)) ||
# If url’s scheme is "file" and its host is an empty host or null, then return.
($url->scheme=="file" && !strlen((string) $url->host))
) {
return $url;
}
# Set url’s scheme to buffer.
$url->scheme = $buffer;
# If state override is given, then:
if ($stateOverride) {
# If url’s port is url’s scheme’s default port, then set url’s port to null.
// OPTIONAL DEVIATION: we optionally allow any registered scheme's port to be defaulted
$portList = (self::$confUseAllSchemePorts ? self::SCHEME_DEFAULT_PORTS : self::SCHEME_SPECIAL);
$url->port = (isset($portList[$url->scheme]) && $url->port==$portList[$url->scheme]) ? null : $url->port;
# Return.
return $url;
}
# Set buffer to the empty string.
$buffer = "";
if ($url->scheme=="file") {
# If url’s scheme is "file", then:
if (substr($input, $posNext, 2) !== "//") {
# If remaining does not start with "//", validation error.
$url->err[] = [$pointer + 1, $posNext, self::ERR_FILE_SCHEME_EXPECTING_DOUBLE_SLASH];
}
# Set state to file state.
$state = self::ST_FILE;
} elseif ($base && $base->scheme===$url->scheme && array_key_exists($url->scheme, self::SCHEME_SPECIAL)) {
# Otherwise, if url is special, base is non-null, and base’s scheme is equal to url’s scheme, set state to special relative or authority state.
# NOTE: This means that base’s cannot-be-a-base-URL flag is unset.
$state = self::ST_SPECIAL_RELATIVE_OR_AUTHORITY;
} elseif (array_key_exists($url->scheme, self::SCHEME_SPECIAL)) {
# Otherwise, if url is special, set state to special authority slashes state.
$state = self::ST_SPECIAL_AUTHORITY_SLASHES;
} elseif ($input[$posNext]=="/") {
# Otherwise, if remaining starts with an U+002F (/), set state to path or authority state and increase pointer by one.
$state = self::ST_PATH_OR_AUTHORITY;
$pos = $posNext;
$pointer++;
} else {
# Otherwise, set url’s cannot-be-a-base-URL flag, append an empty string to url’s path, and set state to cannot-be-a-base-URL path state.
$url->cannotBeBaseUrl = true;
$url->path[] = "";
$state = self::ST_CANNOT_BE_A_BASE_URL_PATH;
}
} elseif (!$stateOverride) {
# Otherwise, if state override is not given, set buffer to the empty string, state to no scheme state, and start over (from the first code point in input).
$buffer = "";
$state = self::ST_NO_SCHEME;
$pos = 0;
$pointer = 0;
continue 2;
} else {
# Otherwise, validation error, return failure.
# NOTE: This indication of failure is used exclusively by Location object’s protocol attribute. Furthermore, the non-failure termination earlier in this state is an intentional difference for defining that attribute.
$url->err[] = [$pointer, $pos, self::ERR_INVALID_SCHEME_CHAR];
$url->failure = true;
return $url;
}
break;
# no scheme state
case self::ST_NO_SCHEME:
if (!$base || ($base->cannotBeBaseUrl && $c != "#")) {
# If base is null, or base’s cannot-be-a-base-URL flag is set and c is not U+0023 (#), validation error, return failure.
$url->err[] = [$pointer, $pos, self::ERR_RELATIVE_URL];
$url->failure = true;
return $url;
} elseif ($base->cannotBeBaseUrl && $c=="#") {
# Otherwise, if base’s cannot-be-a-base-URL flag is set and c is U+0023 (#)
# set url’s scheme to base’s scheme,
$url->scheme = $base->scheme;
# url’s path to a copy of base’s path,
$url->path = $base->path;
# url’s query to base’s query,
$url->query = $base->query;
# url’s fragment to the empty string,
$url->fragment = "";
# set url’s cannot-be-a-base-URL flag,
$url->cannotBeBaseUrl = true;
# and set state to fragment state.
$state = self::ST_FRAGMENT;
} elseif ($base->scheme != "file") {
# Otherwise, if base’s scheme is not "file", set state to relative state and decrease pointer by one.
$state = self::ST_RELATIVE;
$pos = $posPrev;
$pointer--;
} else {
# Otherwise, set state to file state and decrease pointer by one.
$state = self::ST_FILE;
$pos = $posPrev;
$pointer--;
}
break;
# special relative or authority state
case self::ST_SPECIAL_RELATIVE_OR_AUTHORITY:
if ($c=="/" && $input[$posNext]=="/") {
# If c is U+002F (/) and remaining starts with U+002F (/), then set state to special authority ignore slashes state and increase pointer by one.
$state = self::ST_SPECIAL_AUTHORITY_IGNORE_SLASHES;
} else {
# Otherwise, validation error, set state to relative state and decrease pointer by one.
$state = self::ST_RELATIVE;
$pos = $posPrev;
$pointer--;
}
break;
default:
// FIXME: this should be an error, but until the whole state machine is implemented, we stop processing instead
return $url;
}
# If after a run pointer points to the EOF code point, go to the next step.
# Otherwise, increase pointer by one and continue with the state machine.
$posPrev = $pos;
$pos = $posNext;
$pointer++;
} while ($pos <= $eof);
}
protected function getOutputEncoding(string $encoding): string {
// FIXME: stub
return $encoding;
}
protected function isChr(string $c, int $chrClass) {
switch ($chrClass) {
case self::CHR_C0:
return ($c <= "\u{1F}");
case self::CHR_C0_OR_SPACE:
return ($c == " " || $c <= "\u{1F}");
case self::CHR_ASCII_ALPHA:
return (($c >= "A" && $c <= "Z") || ($c >= "z" && $c <= "z"));
case self::CHR_ASCII_ALPHANUM:
return (
($c == (string) (int) $c) || // digits
($c >= "A" && $c <= "Z") || // uppercase alphabetic
($c >= "z" && $c <= "z") // lowercase alphabetic
);
default:
throw new \Exception;
}
}
/** Returns the UTF-8 character at byte offset $pos (which could possibly be a replacement charcter) along with the byte offset of the next character */
protected function getChar(string $input, int $pos, bool $throwOnError = false, $replacementChar = "\u{FFFD}"): array {
// FIXME: stub
// FIXME: write a function to read a whole UTF-8 byte sequence rather than single bytes
// FIXME: return an EOF object and ($pos + 1) if we're at the end of the byte stream
return [$input[$pos], $pos + 1];
}
}

21
lib/URL.php Normal file
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<?php
/** @license MIT
* Copyright 2018 J. King et al.
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace JKingWeb\URI;
class URL extends URI {
public function __construct(string $url, string $base = null) {
$parsedBase = null;
if (!is_null($base)) {
$parsedBase = $this->basicUrlParser($base);
if (is_null($parsedBase)) {
throw new \TypeError;
}
}
$parsedUrl = $this->basicUrlParser($url, $parsedBase);
var_export($parsedUrl);
}
}