Lua

Fetch ISBN XML from isbndb.com and Parse

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

local chilkat = require("chilkat")

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

local http = chilkat.Http.new()

-- 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.
local strXml = http:quick_get_str("http://isbndb.com/api/books.xml?access_key=OV8L2Y9I&results=details&index1=isbn&value1=0443074348")
if not http.last_method_success then
    print(http.last_error_text)
    return
end

local xml = chilkat.Xml.new()
local success = xml:load_xml(strXml)

-- 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:
success = xml:first_child2()
success = xml:first_child2()

-- Show the Title and AuthorsText:
print(xml:get_child_content("Title"))
print(xml:get_child_content("AuthorsText"))

-- Show the publisher_id attribute of the PublisherText node:
local xml2 = xml:find_child("PublisherText")
print(xml2:get_attr_value("publisher_id"))

-- Save the XML to a file:
success = xml:save_xml("book.xml")