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，应该从存档中提取数据:

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);
    }
}

(感谢您解释each和映射difference).但是，当我运行它时，它将在控制台上显示[].

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

推荐答案

您需要在扩展数据可用之前调用zip.expand(am). 您还可以在扩展存档成员之前获取其名称和大小.

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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