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9996b459e1
1. Express desired path.join behavior in tests. 2. Update fs.realpath to reflect new path.join behavior 3. Update url.resolve() to use new path.join behavior.
319 lines
10 KiB
JavaScript
319 lines
10 KiB
JavaScript
exports.parse = urlParse;
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exports.resolve = urlResolve;
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exports.resolveObject = urlResolveObject;
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exports.format = urlFormat;
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// define these here so at least they only have to be compiled once on the first module load.
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var protocolPattern = /^([a-z0-9]+:)/,
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portPattern = /:[0-9]+$/,
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nonHostChars = ["/", "?", ";", "#"],
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hostlessProtocol = {
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"file":true,
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"file:":true
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},
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slashedProtocol = {
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"http":true, "https":true, "ftp":true, "gopher":true, "file":true,
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"http:":true, "https:":true, "ftp:":true, "gopher:":true, "file:":true
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},
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path = require("path"), // internal module, guaranteed to be loaded already.
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querystring = require('querystring');
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function urlParse (url, parseQueryString, slashesDenoteHost) {
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if (url && typeof(url) === "object" && url.href) return url;
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var out = { href : url },
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rest = url;
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var proto = protocolPattern.exec(rest);
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if (proto) {
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proto = proto[0];
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out.protocol = proto;
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rest = rest.substr(proto.length);
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}
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// figure out if it's got a host
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// user@server is *always* interpreted as a hostname, and url
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// resolution will treat //foo/bar as host=foo,path=bar because that's
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// how the browser resolves relative URLs.
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if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
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var slashes = rest.substr(0, 2) === "//";
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if (slashes && !(proto && hostlessProtocol[proto])) {
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rest = rest.substr(2);
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out.slashes = true;
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}
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}
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if (!hostlessProtocol[proto] && (slashes || (proto && !slashedProtocol[proto]))) {
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// there's a hostname.
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// the first instance of /, ?, ;, or # ends the host.
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// don't enforce full RFC correctness, just be unstupid about it.
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var firstNonHost = -1;
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for (var i = 0, l = nonHostChars.length; i < l; i ++) {
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var index = rest.indexOf(nonHostChars[i]);
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if (index !== -1 && (firstNonHost < 0 || index < firstNonHost)) firstNonHost = index;
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}
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if (firstNonHost !== -1) {
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out.host = rest.substr(0, firstNonHost);
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rest = rest.substr(firstNonHost);
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} else {
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out.host = rest;
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rest = "";
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}
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// pull out the auth and port.
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var p = parseHost(out.host);
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var keys = Object.keys(p);
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for (var i = 0, l = keys.length; i < l; i++) {
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var key = keys[i];
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out[key] = p[key];
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}
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// we've indicated that there is a hostname, so even if it's empty, it has to be present.
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out.hostname = out.hostname || "";
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}
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// now rest is set to the post-host stuff.
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// chop off from the tail first.
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var hash = rest.indexOf("#");
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if (hash !== -1) {
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// got a fragment string.
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out.hash = rest.substr(hash);
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rest = rest.slice(0, hash);
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}
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var qm = rest.indexOf("?");
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if (qm !== -1) {
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out.search = rest.substr(qm);
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out.query = rest.substr(qm+1);
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if (parseQueryString) {
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out.query = querystring.parse(out.query);
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}
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rest = rest.slice(0, qm);
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}
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if (rest) out.pathname = rest;
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return out;
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};
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// format a parsed object into a url string
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function urlFormat (obj) {
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// ensure it's an object, and not a string url. If it's an obj, this is a no-op.
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// this way, you can call url_format() on strings to clean up potentially wonky urls.
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if (typeof(obj) === "string") obj = urlParse(obj);
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var protocol = obj.protocol || "",
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host = (obj.host !== undefined) ? obj.host
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: obj.hostname !== undefined ? (
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(obj.auth ? obj.auth + "@" : "")
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+ obj.hostname
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+ (obj.port ? ":" + obj.port : "")
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)
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: false,
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pathname = obj.pathname || "",
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search = obj.search || (
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obj.query && ( "?" + (
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typeof(obj.query) === "object"
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? querystring.stringify(obj.query)
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: String(obj.query)
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))
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) || "",
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hash = obj.hash || "";
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if (protocol && protocol.substr(-1) !== ":") protocol += ":";
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// only the slashedProtocols get the //. Not mailto:, xmpp:, etc.
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// unless they had them to begin with.
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if (obj.slashes || (!protocol || slashedProtocol[protocol]) && host !== false) {
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host = "//" + (host || "");
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if (pathname && pathname.charAt(0) !== "/") pathname = "/" + pathname;
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} else if (!host) host = "";
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if (hash && hash.charAt(0) !== "#") hash = "#" + hash;
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if (search && search.charAt(0) !== "?") search = "?" + search;
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return protocol + host + pathname + search + hash;
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};
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function urlResolve (source, relative) {
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return urlFormat(urlResolveObject(source, relative));
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};
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function urlResolveObject (source, relative) {
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if (!source) return relative;
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source = urlParse(urlFormat(source), false, true);
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relative = urlParse(urlFormat(relative), false, true);
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// hash is always overridden, no matter what.
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source.hash = relative.hash;
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if (relative.href === "") return source;
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// hrefs like //foo/bar always cut to the protocol.
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if (relative.slashes && !relative.protocol) {
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relative.protocol = source.protocol;
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return relative;
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}
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if (relative.protocol && relative.protocol !== source.protocol) {
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// if it's a known url protocol, then changing the protocol does weird things
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// first, if it's not file:, then we MUST have a host, and if there was a path
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// to begin with, then we MUST have a path.
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// if it is file:, then the host is dropped, because that's known to be hostless.
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// anything else is assumed to be absolute.
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if (!slashedProtocol[relative.protocol]) return relative;
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source.protocol = relative.protocol;
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if (!relative.host && !hostlessProtocol[relative.protocol]) {
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var relPath = (relative.pathname || "").split("/");
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while (relPath.length && !(relative.host = relPath.shift()));
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if (!relative.host) relative.host = "";
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if (relPath[0] !== "") relPath.unshift("");
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if (relPath.length < 2) relPath.unshift("");
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relative.pathname = relPath.join("/");
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}
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source.pathname = relative.pathname;
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source.search = relative.search;
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source.query = relative.query;
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source.host = relative.host || "";
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delete source.auth;
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delete source.hostname;
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source.port = relative.port;
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return source;
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}
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var isSourceAbs = (source.pathname && source.pathname.charAt(0) === "/"),
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isRelAbs = (
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relative.host !== undefined
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|| relative.pathname && relative.pathname.charAt(0) === "/"
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),
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mustEndAbs = (isRelAbs || isSourceAbs || (source.host && relative.pathname)),
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removeAllDots = mustEndAbs,
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srcPath = source.pathname && source.pathname.split("/") || [],
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relPath = relative.pathname && relative.pathname.split("/") || [],
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psychotic = source.protocol && !slashedProtocol[source.protocol] && source.host !== undefined;
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// if the url is a non-slashed url, then relative links like ../.. should be able
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// to crawl up to the hostname, as well. This is strange.
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// source.protocol has already been set by now.
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// Later on, put the first path part into the host field.
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if ( psychotic ) {
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delete source.hostname;
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delete source.auth;
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delete source.port;
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if (source.host) {
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if (srcPath[0] === "") srcPath[0] = source.host;
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else srcPath.unshift(source.host);
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}
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delete source.host;
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if (relative.protocol) {
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delete relative.hostname;
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delete relative.auth;
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delete relative.port;
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if (relative.host) {
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if (relPath[0] === "") relPath[0] = relative.host;
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else relPath.unshift(relative.host);
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}
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delete relative.host;
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}
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mustEndAbs = mustEndAbs && (relPath[0] === "" || srcPath[0] === "");
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}
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if (isRelAbs) {
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// it's absolute.
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source.host = (relative.host || relative.host === "") ? relative.host : source.host;
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source.search = relative.search;
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source.query = relative.query;
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srcPath = relPath;
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// fall through to the dot-handling below.
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} else if (relPath.length) {
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// it's relative
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// throw away the existing file, and take the new path instead.
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if (!srcPath) srcPath = [];
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srcPath.pop();
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srcPath = srcPath.concat(relPath);
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source.search = relative.search;
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source.query = relative.query;
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} else if ("search" in relative) {
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// just pull out the search.
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// like href="?foo".
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// Put this after the other two cases because it simplifies the booleans
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if (psychotic) {
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source.host = srcPath.shift();
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}
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source.search = relative.search;
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source.query = relative.query;
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return source;
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}
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if (!srcPath.length) {
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// no path at all. easy.
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// we've already handled the other stuff above.
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delete source.pathname;
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return source;
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}
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// resolve dots.
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// if a url ENDs in . or .., then it must get a trailing slash.
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// however, if it ends in anything else non-slashy, then it must NOT get a trailing slash.
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var last = srcPath.slice(-1)[0];
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var hasTrailingSlash = (
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(source.host || relative.host) && (last === "." || last === "..")
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|| last === ""
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);
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// Figure out if this has to end up as an absolute url, or should continue to be relative.
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srcPath = path.normalizeArray(srcPath, true);
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if (srcPath.length === 1 && srcPath[0] === ".") srcPath = [];
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if (mustEndAbs || removeAllDots) {
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// all dots must go.
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var dirs = [];
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srcPath.forEach(function (dir, i) {
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if (dir === "..") dirs.pop();
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else if (dir !== ".") dirs.push(dir);
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});
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if (mustEndAbs && dirs[0] !== "" && (!dirs[0] || dirs[0].charAt(0) !== "/")) {
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dirs.unshift("");
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}
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srcPath = dirs;
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}
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if (hasTrailingSlash && (srcPath.join("/").substr(-1) !== "/")) {
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srcPath.push("");
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}
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var isAbsolute = srcPath[0] === "" || (srcPath[0] && srcPath[0].charAt(0) === "/");
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// put the host back
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if ( psychotic ) {
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source.host = isAbsolute ? "" : srcPath.shift();
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}
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mustEndAbs = mustEndAbs || (source.host && srcPath.length);
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if (mustEndAbs && !isAbsolute) {
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srcPath.unshift("");
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}
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source.pathname = srcPath.join("/");
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return source;
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};
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function parseHost (host) {
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var out = {};
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var at = host.indexOf("@");
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if (at !== -1) {
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out.auth = host.substr(0, at);
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host = host.substr(at+1); // drop the @
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}
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var port = portPattern.exec(host);
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if (port) {
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port = port[0];
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out.port = port.substr(1);
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host = host.substr(0, host.length - port.length);
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}
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if (host) out.hostname = host;
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return out;
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}
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