快速解压 Epub

本文介绍了快速解压 Epub的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我需要快速解压缩 .epub 文件才能完全自己读取数据.如果我能得到它，我知道如何解析 ePub 的输出(我已经用 python 编写了一个工作示例)，但 SSZipArchive 显然不会解压缩 .epubs.但是，它在虚拟 .zip 文件上运行良好；只有 .epub 是一个问题.据我所知，毫无疑问要问如何在 S.O. 上实际手动执行此操作.除了简单地将人们指向在objective-c中为你做的项目之外，还有很多开销(我不理解或不需要)，这违背了我需要做的事情的目的.以下是我目前的尝试.请注意，可以在以下链接(古腾堡项目)http://www.gutenberg.org/ebooks/158.epub.noimages 并且当我运行它时，打印语句发出:真，真，真，假"(也就是说，文件和路径都存在，但赢了'不解压):

I need to unzip a .epub file in swift to read the data myself entirely. I know how to parse the output of an ePub if I can get it (I've written a working example in python), but SSZipArchive apparently will not unzip .epubs. It does, however, works fine on a dummy .zip file; only .epub is a problem. So far as I can tell, there has been no question asking how to actually do this by hand on S.O. beyond simply pointing people to projects that do it for you in objective-c with lots of overhead (which I don't understand or need) that defeats the purpose of what I need to do. Below is my current attempt. Note that the epub in question can be found at the following link (project gutenberg) http://www.gutenberg.org/ebooks/158.epub.noimages and that when I run this the print statement emits: "true, true, true, false" (that is, the files and paths all exist, but won't unzip):

import Foundation

class EpubExtractor: NSObject, SSZipArchiveDelegate {
    init(fileName: String) {
        fName = fileName
    }

    func getEpubInfo() {
        var paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
        let documentsDir = paths[0]
        let zipPath =  documentsDir.stringByAppendingString("/MyZipFiles") // My folder name in document directory
        let fileManager = NSFileManager.defaultManager()
        let success1 = fileManager.fileExistsAtPath(zipPath) as Bool
        if success1 == false {
            print("no directory")
            do {
                try! fileManager.createDirectoryAtPath(zipPath, withIntermediateDirectories: true, attributes: nil)
            }
        }
        let archivePath = zipPath.stringByAppendingString("/emma.epub") // Sample folder is going to zip with name Demo.zip
        let success2 = fileManager.fileExistsAtPath(archivePath) as Bool
        let destPath = zipPath.stringByAppendingString("/Hello")
        let success3 = fileManager.fileExistsAtPath(destPath) as Bool
        let worked = SSZipArchive.unzipFileAtPath(archivePath, toDestination: destPath, delegate:self)
        print(success1, success2, success3, worked)

    }
}

编辑

以下是用 python 编写的概念代码证明，其中我可以将相同的 epub 识别为 zip 文件并读取其容器内容:

Below is proof of concept code written in python in which I CAN get the very same epub to be recognized as a zip file and read its container content:

import zipfile
dir = "sampleData/epubs/"
fileName = "emma.epub"
print zipfile.is_zipfile(dir+fileName) # Check whether file is zip (this returns true, though in swift it fails)

zip = zipfile.ZipFile(dir+fileName)
txt = zip.read('META-INF/container.xml')  # Print contents of container (this is what I need swift to be able to do)
print txt # This successfully prints the container content text

Gutenberg

问题描述

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