Zig Requires Chilkat v11.0.0+

Extract a Single ZIP Entry While Preserving Its Stored Path

See more Zip Examples

This example demonstrates how to use the ZipEntry.Extract method to extract a single entry from a ZIP archive.

The example first creates a ZIP archive containing a text file. It then re-opens the ZIP, finds the entry, and extracts it to a base directory.

The Extract method uses the relative path stored within the ZIP entry. Any required subdirectories are created automatically beneath the specified base directory.

Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    var success: bool = false;

    // ------------------------------------------------------------
    // First create a sample ZIP archive containing a small text file.

    const zip = try chilkat.Zip.init();
    defer zip.deinit();

    success = if (zip.newZip("c:/temp/sampleText.zip")) true else |_| false;
    if (!success) {
        std.debug.print("{s}\n", .{try zip.getLastErrorText(alloc)});
        return;
    }

    // Add a small text file from memory.
    success = if (zip.addString("myApp/docs/hello.txt", "Hello from a ZIP entry!", "utf-8")) true else |_| false;
    if (!success) {
        std.debug.print("{s}\n", .{try zip.getLastErrorText(alloc)});
        return;
    }

    // Write the ZIP archive to disk and close it.
    success = if (zip.writeZipAndClose()) true else |_| false;
    if (!success) {
        std.debug.print("{s}\n", .{try zip.getLastErrorText(alloc)});
        return;
    }

    // ------------------------------------------------------------
    // Now open the ZIP archive we just created.

    const zip2 = try chilkat.Zip.init();
    defer zip2.deinit();

    success = if (zip2.openZip("c:/temp/sampleText.zip")) true else |_| false;
    if (!success) {
        std.debug.print("{s}\n", .{try zip2.getLastErrorText(alloc)});
        return;
    }

    // Find the entry by its stored ZIP path.
    const entry = try chilkat.ZipEntry.init();
    defer entry.deinit();

    success = zip2.entryOf("myApp/docs/hello.txt", entry);

    if (!success) {
        std.debug.print("Entry not found.\n", .{});
        return;
    }

    // Extract this single entry to the base directory:
    //
    //     c:/temp/extracted
    //
    // Because the entry's stored path is:
    //
    //     myApp/docs/hello.txt
    //
    // the file will be extracted to:
    //
    //     qa_output/extracted/myApp/docs/hello.txt
    //
    // The required subdirectories are created automatically.
    entry.extract("c:/temp/extracted") catch {
        std.debug.print("{s}\n", .{try entry.getLastErrorText(alloc)});
        return;
    };

    zip2.closeZip();

    std.debug.print("Entry extracted successfully.\n", .{});
}