Fetch ISBN XML from isbndb.com and Parse

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

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATXMLLib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
xml0: CHILKATXMLLib_TLB.IChilkatXml;
xml: CHILKATXMLLib_TLB.IChilkatXml;
xml2: CHILKATXMLLib_TLB.IChilkatXml;

begin
xml0 := TChilkatXml.Create(Self).ControlInterface;

//  The Chilkat XML component/class is freeware.

xml := xml0.HttpGet('http://isbndb.com/api/books.xml?access_key=XXXXX&results=details&index1=isbn&value1=0443074348');
if (xml = nil ) then
  begin
    ShowMessage(xml0.LastErrorText);

  end;

//  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:
Memo1.Lines.Add(xml.GetChildContent('Title'));
Memo1.Lines.Add(xml.GetChildContent('AuthorsText'));

//  Show the publisher_id attribute of the PublisherText node:

xml2 := xml.FindChild('PublisherText');
Memo1.Lines.Add(xml2.GetAttrValue('publisher_id'));

//  Save the XML to a file:
xml.SaveXml('book.xml');


end;