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78 lines
2.0 KiB
78 lines
2.0 KiB
2 years ago
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var path = require('path');
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var url = require('url');
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var isRemoteResource = require('../utils/is-remote-resource');
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var hasProtocol = require('../utils/has-protocol');
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var HTTP_PROTOCOL = 'http:';
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function isAllowedResource(uri, isRemote, rules) {
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var match;
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var absoluteUri;
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var allowed = !isRemote;
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var rule;
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var isNegated;
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var normalizedRule;
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var i;
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if (rules.length === 0) {
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return false;
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}
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if (isRemote && !hasProtocol(uri)) {
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uri = HTTP_PROTOCOL + uri;
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}
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match = isRemote
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? url.parse(uri).host
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: uri;
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absoluteUri = isRemote
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? uri
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: path.resolve(uri);
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for (i = 0; i < rules.length; i++) {
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rule = rules[i];
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isNegated = rule[0] == '!';
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normalizedRule = rule.substring(1);
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if (isNegated && isRemote && isRemoteRule(normalizedRule)) {
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allowed = allowed && !isAllowedResource(uri, true, [normalizedRule]);
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} else if (isNegated && !isRemote && !isRemoteRule(normalizedRule)) {
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allowed = allowed && !isAllowedResource(uri, false, [normalizedRule]);
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} else if (isNegated) {
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allowed = allowed && true;
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} else if (rule == 'all') {
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allowed = true;
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} else if (isRemote && rule == 'local') {
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allowed = allowed || false;
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} else if (isRemote && rule == 'remote') {
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allowed = true;
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} else if (!isRemote && rule == 'remote') {
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allowed = false;
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} else if (!isRemote && rule == 'local') {
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allowed = true;
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} else if (rule === match) {
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allowed = true;
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} else if (rule === uri) {
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allowed = true;
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} else if (isRemote && absoluteUri.indexOf(rule) === 0) {
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allowed = true;
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} else if (!isRemote && absoluteUri.indexOf(path.resolve(rule)) === 0) {
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allowed = true;
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} else if (isRemote != isRemoteRule(normalizedRule)) {
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allowed = allowed && true;
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} else {
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allowed = false;
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}
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}
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return allowed;
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}
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function isRemoteRule(rule) {
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return isRemoteResource(rule) || url.parse(HTTP_PROTOCOL + '//' + rule).host == rule;
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}
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module.exports = isAllowedResource;
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