Zig

Fetch ISBN XML from isbndb.com and Parse

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Demonstrates sending a query to isbndb.com and parsing the XML response. 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();

    // The access_key in this URL is a valid access key, but limited to 100 queries per day.
    // If the key does not work, it may be that others were testing and exhausted the limit.
    const str_xml = http.quickGetStr(alloc, "http://isbndb.com/api/books.xml?access_key=OV8L2Y9I&results=details&index1=isbn&value1=0443074348") catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    const xml = try chilkat.Xml.init();
    defer xml.deinit();
    try xml.loadXml(str_xml);

    // The XML returned for this URL is the following:

    // <?xml version="1.0" encoding="UTF-8" ?>

    // <ISBNdb server_time="2007-10-25T14:07:25Z">
    //     <BookList total_results="1" page_size="10" page_number="1" shown_results="1">
    //         <BookData book_id="diagnostic_histopathology_of_tumors_2_volume_set_with_cd_rom" isbn="0443074348">
    //             <Title>Diagnostic Histopathology of Tumors: 2-Volume Set with CD-ROMs</Title>
    //             <TitleLong>Diagnostic Histopathology of Tumors: 2-Volume Set with CD-ROMs (Diagnostic Histopathology of Tumors (Fletcher))</TitleLong>
    //             <AuthorsText>Christopher D. M. Fletcher (Editor)</AuthorsText>
    //             <PublisherText publisher_id="churchill_livingstone">Churchill Livingstone</PublisherText>
    //             <Details dewey_decimal="616" physical_description_text="2166 pages" language="" edition_info="Hardcover; 2007-03-13" dewey_decimal_normalized="616" lcc_number="" change_time="2006-12-13T14:53:42Z" price_time="2007-10-25T01:12:13Z" />
    //         </BookData>
    //     </BookList>
    // </ISBNdb>

    // First, navigate to the BookData node:
    _ = xml.firstChild2();
    _ = xml.firstChild2();

    // Show the Title and AuthorsText:
    std.debug.print("{s}\n", .{try xml.getChildContent(alloc, "Title")});
    std.debug.print("{s}\n", .{try xml.getChildContent(alloc, "AuthorsText")});

    // Show the publisher_id attribute of the PublisherText node:
    const xml2 = try xml.findChild("PublisherText");
    defer xml2.deinit();
    std.debug.print("{s}\n", .{try xml2.getAttrValue(alloc, "publisher_id")});

    // Save the XML to a file:
    try xml.saveXml("book.xml");
}