mirror of
https://github.com/QL-Win/QuickLook.git
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48 lines
2.1 KiB
C#
48 lines
2.1 KiB
C#
// Copyright © 2018 Marco Gavelli and Paddy Xu
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//
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// This file is part of QuickLook program.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using System;
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using System.IO.Compression;
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using System.Threading.Tasks;
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using System.Xml.Linq;
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namespace VersOne.Epub.Internal
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{
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internal static class RootFilePathReader
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{
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public static async Task<string> GetRootFilePathAsync(ZipArchive epubArchive)
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{
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const string EPUB_CONTAINER_FILE_PATH = "META-INF/container.xml";
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var containerFileEntry = epubArchive.GetEntry(EPUB_CONTAINER_FILE_PATH);
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if (containerFileEntry == null)
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throw new Exception(string.Format("EPUB parsing error: {0} file not found in archive.",
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EPUB_CONTAINER_FILE_PATH));
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XDocument containerDocument;
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using (var containerStream = containerFileEntry.Open())
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{
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containerDocument = await XmlUtils.LoadDocumentAsync(containerStream).ConfigureAwait(false);
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}
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XNamespace cnsNamespace = "urn:oasis:names:tc:opendocument:xmlns:container";
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var fullPathAttribute = containerDocument.Element(cnsNamespace + "container")
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?.Element(cnsNamespace + "rootfiles")?.Element(cnsNamespace + "rootfile")?.Attribute("full-path");
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if (fullPathAttribute == null)
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throw new Exception("EPUB parsing error: root file path not found in the EPUB container.");
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return fullPathAttribute.Value;
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}
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}
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} |