Question

I need to get book information from isbndb.com trough XML service using this link http://isbndb.com/api/books.xml?access_key=12345678&index1=isbn&value1=9780321635345.

Any Idea how to do that in delphi?

Answer 1

You need a HTTP client (lets say Indy) and an XML parser. For XML parser just use OmniXML for instance. Indy is included with Delphi7. Then just write a code like this:

procedure TForm1.Button1Click(Sender: TObject);
const
  cURL = 'http://isbndb.com/api/books.xml?access_key=12345678&index1=isbn&value1=9780321635345';
var
  HTTPClient: TIdHTTP;
  XMLAsStream: TMemoryStream;
  XMLDocument: IXMLDocument;
begin
  HTTPClient := TIdHTTP.Create(nil);
  try
    XMLAsStream := TMemoryStream;
    try
      HTTPClient.Get(cURL, XMLAsStream);
      XMLAsStream.Position := 0; 

      XMLDocument := CreateXMLDoc;
      XMLDocument.LoadFromStream(XMLAsStream);
    finally
      XMLAsStream.Free;
    end;
  finally
    HTTPClient.Free;
  end;
end;

Now you have your XML document parsed as DOM in memory. Just use it 🙂