Zig Requires Chilkat v11.0.0+

Get Size of File on Web Server

See more HTTP Examples

Demonstrates how to send a HEAD request to fetch information about a file on a web server, which hopefully includes the Content-Length in the response header. Zig

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

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

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    const http = try chilkat.Http.init();
    defer http.deinit();

    const resp = try chilkat.HttpResponse.init();
    defer resp.deinit();
    http.httpNoBody("HEAD", "https://nodejs.org/dist/v10.16.1/node-v10.16.1-win-x64.zip", resp) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    // Examine the response header.
    std.debug.print("{s}\n", .{try resp.getHeader(alloc)});

    // Here is a sample response header:

    // Date: Thu, 01 Aug 2019 12:47:27 GMT
    // Content-Type: application/zip
    // Content-Length: 17457922
    // Connection: keep-alive
    // Set-Cookie: __cfduid=da5b78dcdd8171683c5a578eb9c9f88c81564663647; expires=Fri, 31-Jul-20 12:47:27 GMT; path=/; domain=.nodejs.org; HttpOnly
    // Last-Modified: Wed, 31 Jul 2019 18:21:57 GMT
    // ETag: "5d41dc45-10a6302"
    // Accept-Ranges: bytes
    // Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
    // Server: cloudflare
    // CF-RAY: 4ff7ebb32ac4e1e2-ORD

    // Get the Content-Length header.
    // If the header exists...
    if (resp.getHeaderField(alloc, "Content-Length")) |content_length_str| {
        std.debug.print("Content-Length: {s}\n", .{content_length_str});
        // Your application can convert the contentLengthStr to an integer and then use it....
    } else |_| {}
}