D:如何从存档中提取数据? [英] D: how to extract data from archive?

问题描述

我有非常简单的代码可以从存档中提取数据:

I have very simple code that should extract data from archive:

import std.stdio;
import std.string;
import std.file;
import std.algorithm;
import std.zip;

void main()
{
    string ar = `D:\ftp\s2-imfset_2015\IFPET-150101.zip`;
    auto zip = new ZipArchive(ar.read);
    foreach(ArchiveMember am; zip.directory)
    {
        writeln(am.expandedData);
    }
}

(感谢您对 each 和映射 difference 的解释).但是当我运行它时，它会在控制台上打印 [].

(thanks for explaining about each and map difference). But when I run it it's print [] on console.

推荐答案

在扩展数据可用之前，您需要调用 zip.expand(am).您还可以在展开之前获取存档成员的名称和大小.

You need to call zip.expand(am) before the expanded data is available. You can also get the name and size of an archive member before expanding it.

import std.stdio;
import std.string;
import std.file;
import std.algorithm;
import std.zip;

void main()
{
    string ar = `D:\ftp\s2-imfset_2015\IFPET-150101.zip`;
    auto zip = new ZipArchive(ar.read);
    foreach(name, am; zip.directory)
    {
        if(!am.expandedSize) continue; // ignore empty files
        zip.expand(am);
        writeln(am.expandedData);
    }
}

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