87 lines
2.9 KiB
87 lines
2.9 KiB
/* Copyright 2017 Mozilla Foundation |
|
* |
|
* Licensed under the Apache License, Version 2.0 (the "License"); |
|
* you may not use this file except in compliance with the License. |
|
* You may obtain a copy of the License at |
|
* |
|
* http://www.apache.org/licenses/LICENSE-2.0 |
|
* |
|
* Unless required by applicable law or agreed to in writing, software |
|
* distributed under the License is distributed on an "AS IS" BASIS, |
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
* See the License for the specific language governing permissions and |
|
* limitations under the License. |
|
*/ |
|
'use strict'; |
|
|
|
var sharedUtil = require('../shared/util.js'); |
|
var error = sharedUtil.error; |
|
function fixMetadata(meta) { |
|
return meta.replace(/>\\376\\377([^<]+)/g, function (all, codes) { |
|
var bytes = codes.replace(/\\([0-3])([0-7])([0-7])/g, function (code, d1, d2, d3) { |
|
return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1); |
|
}); |
|
var chars = ''; |
|
for (var i = 0; i < bytes.length; i += 2) { |
|
var code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1); |
|
chars += code >= 32 && code < 127 && code !== 60 && code !== 62 && code !== 38 ? String.fromCharCode(code) : '&#x' + (0x10000 + code).toString(16).substring(1) + ';'; |
|
} |
|
return '>' + chars; |
|
}); |
|
} |
|
function Metadata(meta) { |
|
if (typeof meta === 'string') { |
|
meta = fixMetadata(meta); |
|
var parser = new DOMParser(); |
|
meta = parser.parseFromString(meta, 'application/xml'); |
|
} else if (!(meta instanceof Document)) { |
|
error('Metadata: Invalid metadata object'); |
|
} |
|
this.metaDocument = meta; |
|
this.metadata = Object.create(null); |
|
this.parse(); |
|
} |
|
Metadata.prototype = { |
|
parse: function Metadata_parse() { |
|
var doc = this.metaDocument; |
|
var rdf = doc.documentElement; |
|
if (rdf.nodeName.toLowerCase() !== 'rdf:rdf') { |
|
rdf = rdf.firstChild; |
|
while (rdf && rdf.nodeName.toLowerCase() !== 'rdf:rdf') { |
|
rdf = rdf.nextSibling; |
|
} |
|
} |
|
var nodeName = rdf ? rdf.nodeName.toLowerCase() : null; |
|
if (!rdf || nodeName !== 'rdf:rdf' || !rdf.hasChildNodes()) { |
|
return; |
|
} |
|
var children = rdf.childNodes, |
|
desc, |
|
entry, |
|
name, |
|
i, |
|
ii, |
|
length, |
|
iLength; |
|
for (i = 0, length = children.length; i < length; i++) { |
|
desc = children[i]; |
|
if (desc.nodeName.toLowerCase() !== 'rdf:description') { |
|
continue; |
|
} |
|
for (ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) { |
|
if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') { |
|
entry = desc.childNodes[ii]; |
|
name = entry.nodeName.toLowerCase(); |
|
this.metadata[name] = entry.textContent.trim(); |
|
} |
|
} |
|
} |
|
}, |
|
get: function Metadata_get(name) { |
|
return this.metadata[name] || null; |
|
}, |
|
has: function Metadata_has(name) { |
|
return typeof this.metadata[name] !== 'undefined'; |
|
} |
|
}; |
|
exports.Metadata = Metadata; |