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url: replace "magic" numbers by constants
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PR-URL: nodejs#19035
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Khaidi Chu <i@2333.moe>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
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@daynin @BridgeAR
daynin authored and BridgeAR committed Mar 11, 2018
1 parent 0e35683 commit 2f74326
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Showing 2 changed files with 109 additions and 49 deletions.
21 changes: 21 additions & 0 deletions lib/internal/constants.js
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Original file line number Diff line number Diff line change
Expand Up @@ -11,13 +11,34 @@ module.exports = {
CHAR_DOT: 46, /* . */
CHAR_FORWARD_SLASH: 47, /* / */
CHAR_BACKWARD_SLASH: 92, /* \ */
CHAR_VERTICAL_LINE: 124, /* | */
CHAR_COLON: 58, /* : */
CHAR_QUESTION_MARK: 63, /* ? */
CHAR_UNDERSCORE: 95, /* _ */
CHAR_LINE_FEED: 10, /* \n */
CHAR_CARRIAGE_RETURN: 13, /* \r */
CHAR_TAB: 9, /* \t */
CHAR_FORM_FEED: 12, /* \f */
CHAR_EXCLAMATION_MARK: 33, /* ! */
CHAR_HASH: 35, /* # */
CHAR_SPACE: 32, /* */
CHAR_NO_BREAK_SPACE: 160, /* \u00A0 */
CHAR_ZERO_WIDTH_NOBREAK_SPACE: 65279, /* \uFEFF */
CHAR_LEFT_SQUARE_BRACKET: 91, /* [ */
CHAR_RIGHT_SQUARE_BRACKET: 93, /* ] */
CHAR_LEFT_ANGLE_BRACKET: 60, /* < */
CHAR_RIGHT_ANGLE_BRACKET: 62, /* > */
CHAR_LEFT_CURLY_BRACKET: 123, /* { */
CHAR_RIGHT_CURLY_BRACKET: 125, /* } */
CHAR_HYPHEN_MINUS: 45, /* - */
CHAR_PLUS: 43, /* + */
CHAR_DOUBLE_QUOTE: 34, /* " */
CHAR_SINGLE_QUOTE: 39, /* ' */
CHAR_PERCENT: 37, /* % */
CHAR_SEMICOLON: 59, /* ; */
CHAR_CIRCUMFLEX_ACCENT: 94, /* ^ */
CHAR_GRAVE_ACCENT: 96, /* ` */
CHAR_AT: 64, /* @ */

// Digits
CHAR_0: 48, /* 0 */
Expand Down
137 changes: 88 additions & 49 deletions lib/url.js
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Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,43 @@ const slashedProtocol = {
'file:': true
};
const querystring = require('querystring');
const {
CHAR_SPACE,
CHAR_TAB,
CHAR_CARRIAGE_RETURN,
CHAR_LINE_FEED,
CHAR_FORM_FEED,
CHAR_NO_BREAK_SPACE,
CHAR_ZERO_WIDTH_NOBREAK_SPACE,
CHAR_HASH,
CHAR_FORWARD_SLASH,
CHAR_LEFT_SQUARE_BRACKET,
CHAR_RIGHT_SQUARE_BRACKET,
CHAR_LEFT_ANGLE_BRACKET,
CHAR_RIGHT_ANGLE_BRACKET,
CHAR_LEFT_CURLY_BRACKET,
CHAR_RIGHT_CURLY_BRACKET,
CHAR_QUESTION_MARK,
CHAR_LOWERCASE_A,
CHAR_LOWERCASE_Z,
CHAR_UPPERCASE_A,
CHAR_UPPERCASE_Z,
CHAR_DOT,
CHAR_0,
CHAR_9,
CHAR_HYPHEN_MINUS,
CHAR_PLUS,
CHAR_UNDERSCORE,
CHAR_DOUBLE_QUOTE,
CHAR_SINGLE_QUOTE,
CHAR_PERCENT,
CHAR_SEMICOLON,
CHAR_BACKWARD_SLASH,
CHAR_CIRCUMFLEX_ACCENT,
CHAR_GRAVE_ACCENT,
CHAR_VERTICAL_LINE,
CHAR_AT,
} = require('internal/constants');

function urlParse(url, parseQueryString, slashesDenoteHost) {
if (url instanceof Url) return url;
Expand Down Expand Up @@ -121,13 +158,13 @@ Url.prototype.parse = function parse(url, parseQueryString, slashesDenoteHost) {
const code = url.charCodeAt(i);

// Find first and last non-whitespace characters for trimming
const isWs = code === 32/* */ ||
code === 9/*\t*/ ||
code === 13/*\r*/ ||
code === 10/*\n*/ ||
code === 12/*\f*/ ||
code === 160/*\u00A0*/ ||
code === 65279/*\uFEFF*/;
const isWs = code === CHAR_SPACE ||
code === CHAR_TAB ||
code === CHAR_CARRIAGE_RETURN ||
code === CHAR_LINE_FEED ||
code === CHAR_FORM_FEED ||
code === CHAR_NO_BREAK_SPACE ||
code === CHAR_ZERO_WIDTH_NOBREAK_SPACE;
if (start === -1) {
if (isWs)
continue;
Expand All @@ -145,20 +182,20 @@ Url.prototype.parse = function parse(url, parseQueryString, slashesDenoteHost) {
// Only convert backslashes while we haven't seen a split character
if (!split) {
switch (code) {
case 35: // '#'
case CHAR_HASH:
hasHash = true;
// Fall through
case 63: // '?'
case CHAR_QUESTION_MARK:
split = true;
break;
case 92: // '\\'
case CHAR_BACKWARD_SLASH:
if (i - lastPos > 0)
rest += url.slice(lastPos, i);
rest += '/';
lastPos = i + 1;
break;
}
} else if (!hasHash && code === 35/*#*/) {
} else if (!hasHash && code === CHAR_HASH) {
hasHash = true;
}
}
Expand Down Expand Up @@ -220,8 +257,8 @@ Url.prototype.parse = function parse(url, parseQueryString, slashesDenoteHost) {
// resolution will treat //foo/bar as host=foo,path=bar because that's
// how the browser resolves relative URLs.
if (slashesDenoteHost || proto || hostPattern.test(rest)) {
var slashes = rest.charCodeAt(0) === 47/*/*/ &&
rest.charCodeAt(1) === 47/*/*/;
var slashes = rest.charCodeAt(0) === CHAR_FORWARD_SLASH &&
rest.charCodeAt(1) === CHAR_FORWARD_SLASH;
if (slashes && !(proto && hostlessProtocol[proto])) {
rest = rest.slice(2);
this.slashes = true;
Expand Down Expand Up @@ -251,35 +288,35 @@ Url.prototype.parse = function parse(url, parseQueryString, slashesDenoteHost) {
var nonHost = -1;
for (i = 0; i < rest.length; ++i) {
switch (rest.charCodeAt(i)) {
case 9: // '\t'
case 10: // '\n'
case 13: // '\r'
case 32: // ' '
case 34: // '"'
case 37: // '%'
case 39: // '\''
case 59: // ';'
case 60: // '<'
case 62: // '>'
case 92: // '\\'
case 94: // '^'
case 96: // '`'
case 123: // '{'
case 124: // '|'
case 125: // '}'
case CHAR_TAB:
case CHAR_LINE_FEED:
case CHAR_CARRIAGE_RETURN:
case CHAR_SPACE:
case CHAR_DOUBLE_QUOTE:
case CHAR_PERCENT:
case CHAR_SINGLE_QUOTE:
case CHAR_SEMICOLON:
case CHAR_LEFT_ANGLE_BRACKET:
case CHAR_RIGHT_ANGLE_BRACKET:
case CHAR_BACKWARD_SLASH:
case CHAR_CIRCUMFLEX_ACCENT:
case CHAR_GRAVE_ACCENT:
case CHAR_LEFT_CURLY_BRACKET:
case CHAR_VERTICAL_LINE:
case CHAR_RIGHT_CURLY_BRACKET:
// Characters that are never ever allowed in a hostname from RFC 2396
if (nonHost === -1)
nonHost = i;
break;
case 35: // '#'
case 47: // '/'
case 63: // '?'
case CHAR_HASH:
case CHAR_FORWARD_SLASH:
case CHAR_QUESTION_MARK:
// Find the first instance of any host-ending characters
if (nonHost === -1)
nonHost = i;
hostEnd = i;
break;
case 64: // '@'
case CHAR_AT:
// At this point, either we have an explicit point where the
// auth portion cannot go past, or the last @ char is the decider.
atSign = i;
Expand Down Expand Up @@ -314,8 +351,8 @@ Url.prototype.parse = function parse(url, parseQueryString, slashesDenoteHost) {

// if hostname begins with [ and ends with ]
// assume that it's an IPv6 address.
var ipv6Hostname = hostname.charCodeAt(0) === 91/*[*/ &&
hostname.charCodeAt(hostname.length - 1) === 93/*]*/;
var ipv6Hostname = hostname.charCodeAt(0) === CHAR_LEFT_SQUARE_BRACKET &&
hostname.charCodeAt(hostname.length - 1) === CHAR_RIGHT_SQUARE_BRACKET;

// validate a little.
if (!ipv6Hostname) {
Expand Down Expand Up @@ -369,11 +406,11 @@ Url.prototype.parse = function parse(url, parseQueryString, slashesDenoteHost) {
var hashIdx = -1;
for (i = 0; i < rest.length; ++i) {
const code = rest.charCodeAt(i);
if (code === 35/*#*/) {
if (code === CHAR_HASH) {
this.hash = rest.slice(i);
hashIdx = i;
break;
} else if (code === 63/*?*/ && questionIdx === -1) {
} else if (code === CHAR_QUESTION_MARK && questionIdx === -1) {
questionIdx = i;
}
}
Expand Down Expand Up @@ -424,13 +461,13 @@ Url.prototype.parse = function parse(url, parseQueryString, slashesDenoteHost) {
function validateHostname(self, rest, hostname) {
for (var i = 0; i < hostname.length; ++i) {
const code = hostname.charCodeAt(i);
const isValid = (code >= 97/*a*/ && code <= 122/*z*/) ||
code === 46/*.*/ ||
(code >= 65/*A*/ && code <= 90/*Z*/) ||
(code >= 48/*0*/ && code <= 57/*9*/) ||
code === 45/*-*/ ||
code === 43/*+*/ ||
code === 95/*_*/ ||
const isValid = (code >= CHAR_LOWERCASE_A && code <= CHAR_LOWERCASE_Z) ||
code === CHAR_DOT ||
(code >= CHAR_UPPERCASE_A && code <= CHAR_UPPERCASE_Z) ||
(code >= CHAR_0 && code <= CHAR_9) ||
code === CHAR_HYPHEN_MINUS ||
code === CHAR_PLUS ||
code === CHAR_UNDERSCORE ||
code > 127;

// Invalid host character
Expand Down Expand Up @@ -544,13 +581,13 @@ Url.prototype.format = function format() {
var lastPos = 0;
for (var i = 0; i < pathname.length; ++i) {
switch (pathname.charCodeAt(i)) {
case 35: // '#'
case CHAR_HASH:
if (i - lastPos > 0)
newPathname += pathname.slice(lastPos, i);
newPathname += '%23';
lastPos = i + 1;
break;
case 63: // '?'
case CHAR_QUESTION_MARK:
if (i - lastPos > 0)
newPathname += pathname.slice(lastPos, i);
newPathname += '%3F';
Expand All @@ -569,7 +606,7 @@ Url.prototype.format = function format() {
// unless they had them to begin with.
if (this.slashes || slashedProtocol[protocol]) {
if (this.slashes || host) {
if (pathname && pathname.charCodeAt(0) !== 47/*/*/)
if (pathname && pathname.charCodeAt(0) !== CHAR_FORWARD_SLASH)
pathname = '/' + pathname;
host = '//' + host;
} else if (protocol.length >= 4 &&
Expand All @@ -583,8 +620,10 @@ Url.prototype.format = function format() {

search = search.replace(/#/g, '%23');

if (hash && hash.charCodeAt(0) !== 35/*#*/) hash = '#' + hash;
if (search && search.charCodeAt(0) !== 63/*?*/) search = '?' + search;
if (hash && hash.charCodeAt(0) !== CHAR_HASH)
hash = '#' + hash;
if (search && search.charCodeAt(0) !== CHAR_QUESTION_MARK)
search = '?' + search;

return protocol + host + pathname + search + hash;
};
Expand Down

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