Get Books: Add store plugins for Amazon Australia and Amazon India. Fixes #1526089 [Feature request - please add Amazon.au](https://bugs.launchpad.net/calibre/+bug/1526089)

src/calibre/customize/builtins.py

@@ -1276,15 +1276,32 @@ class StoreSonyAUStore(StoreSonyStore):
     actual_plugin = 'calibre.gui2.store.stores.sony_au_plugin:SonyStore'
     headquarters = 'AU'
 
+class StoreAmazonAUKindleStore(StoreBase):
+    name = 'Amazon AU Kindle'
+    author = u'Kovid Goyal'
+    description = u'Kindle books from Amazon.'
+    actual_plugin = 'calibre.gui2.store.stores.amazon_au_plugin:AmazonKindleStore'
+
+    headquarters = 'AU'
+    formats = ['KINDLE']
+
 class StoreAmazonCAKindleStore(StoreBase):
     name = 'Amazon CA Kindle'
-    author = u'Tomasz Długosz'
+    author = u'Kovid Goyal'
     description = u'Kindle books from Amazon.'
-    actual_plugin = 'calibre.gui2.store.stores.amazon_ca_plugin:AmazonCAKindleStore'
+    actual_plugin = 'calibre.gui2.store.stores.amazon_ca_plugin:AmazonKindleStore'
 
     headquarters = 'CA'
     formats = ['KINDLE']
-    # affiliate = True
+
+class StoreAmazonINKindleStore(StoreBase):
+    name = 'Amazon IN Kindle'
+    author = u'Kovid Goyal'
+    description = u'Kindle books from Amazon.'
+    actual_plugin = 'calibre.gui2.store.stores.amazon_in_plugin:AmazonKindleStore'
+
+    headquarters = 'IN'
+    formats = ['KINDLE']
 
 # Remove this plugin definition in Jan 2016 because of Amazon demand.  We leave
 # it here until then so users have a chance to see wny the store is gone.
@@ -1750,7 +1767,9 @@ plugins += [
     StoreBubokPublishingStore,
     StoreBubokPortugalStore,
     StoreAmazonKindleStore,
+    StoreAmazonAUKindleStore,
     StoreAmazonCAKindleStore,
+    StoreAmazonINKindleStore,
     StoreAmazonDEKindleStore,
     StoreAmazonESKindleStore,
     StoreAmazonFRKindleStore,

src/calibre/gui2/store/stores/amazon_au_plugin.py

@@ -0,0 +1,141 @@
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
+
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+store_version = 1  # Needed for dynamic plugin loading
+
+from contextlib import closing
+import urllib
+
+from lxml import html
+
+from PyQt5.Qt import QUrl
+
+from calibre import browser
+from calibre.gui2 import open_url
+from calibre.gui2.store import StorePlugin
+from calibre.gui2.store.search_result import SearchResult
+
+SEARCH_BASE_URL = 'http://www.amazon.com.au/s/'
+SEARCH_BASE_QUERY = {'url': 'search-alias=digital-text'}
+DETAILS_URL = 'http://amazon.com.au/dp/'
+STORE_LINK =  'http://www.amazon.com.au'
+DRM_SEARCH_TEXT = 'Simultaneous Device Usage'
+DRM_FREE_TEXT = 'Unlimited'
+
+def search_amazon(query, max_results=10, timeout=60,
+                  write_html_to=None,
+                  base_url=SEARCH_BASE_URL,
+                  base_query=SEARCH_BASE_QUERY,
+                  field_keywords='field-keywords'
+                  ):
+    uquery = base_query.copy()
+    uquery[field_keywords] = query
+    def asbytes(x):
+        if isinstance(x, type('')):
+            x = x.encode('utf-8')
+        return x
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
+    br = browser()
+
+    counter = max_results
+    with closing(br.open(url, timeout=timeout)) as f:
+        raw = f.read()
+        if write_html_to is not None:
+            with open(write_html_to, 'wb') as f:
+                f.write(raw)
+        doc = html.fromstring(raw)
+        try:
+            results = doc.xpath('//div[@id="atfResults" and @class]')[0]
+        except IndexError:
+            return
+
+        if 's-result-list-parent-container' in results.get('class', ''):
+            data_xpath = "descendant-or-self::li[@class and contains(concat(' ', normalize-space(@class), ' '), ' s-result-item ')]"
+            format_xpath = './/a[@title="Kindle Edition"]/@title'
+            asin_xpath = '@data-asin'
+            cover_xpath =  "descendant-or-self::img[@class and contains(concat(' ', normalize-space(@class), ' '), ' s-access-image ')]/@src"
+            title_xpath = "descendant-or-self::h2[@class and contains(concat(' ', normalize-space(@class), ' '), ' s-access-title ')]//text()"
+            author_xpath = './/span[starts-with(text(), "by ")]/following-sibling::span//text()'
+            price_xpath = '(.//span[contains(@class, " s-price ")])[last()]//text()'
+        else:
+            return
+
+        for data in doc.xpath(data_xpath):
+            if counter <= 0:
+                break
+
+            # Even though we are searching digital-text only Amazon will still
+            # put in results for non Kindle books (author pages). Se we need
+            # to explicitly check if the item is a Kindle book and ignore it
+            # if it isn't.
+            format = ''.join(data.xpath(format_xpath))
+            if 'kindle' not in format.lower():
+                continue
+
+            # We must have an asin otherwise we can't easily reference the
+            # book later.
+            asin = data.xpath(asin_xpath)
+            if asin:
+                asin = asin[0]
+            else:
+                continue
+
+            cover_url = ''.join(data.xpath(cover_xpath))
+
+            title = ''.join(data.xpath(title_xpath))
+            author = ''.join(data.xpath(author_xpath))
+            try:
+                author = author.split('by ', 1)[1].split(" (")[0]
+            except:
+                pass
+
+            price = ''.join(data.xpath(price_xpath))
+
+            counter -= 1
+
+            s = SearchResult()
+            s.cover_url = cover_url.strip()
+            s.title = title.strip()
+            s.author = author.strip()
+            s.price = price.strip()
+            s.detail_item = asin.strip()
+            s.formats = 'Kindle'
+
+            yield s
+
+class AmazonKindleStore(StorePlugin):
+
+    def open(self, parent=None, detail_item=None, external=False):
+        store_link = (DETAILS_URL + detail_item) if detail_item else STORE_LINK
+        open_url(QUrl(store_link))
+
+    def search(self, query, max_results=10, timeout=60):
+        for result in search_amazon(query, max_results=max_results, timeout=timeout):
+            yield result
+
+    def get_details(self, search_result, timeout):
+        url = DETAILS_URL
+
+        br = browser()
+        with closing(br.open(url + search_result.detail_item, timeout=timeout)) as nf:
+            idata = html.fromstring(nf.read())
+            if idata.xpath('boolean(//div[@class="content"]//li/b[contains(text(), "' +
+                           DRM_SEARCH_TEXT + '")])'):
+                if idata.xpath('boolean(//div[@class="content"]//li[contains(., "' +
+                               DRM_FREE_TEXT + '") and contains(b, "' +
+                               DRM_SEARCH_TEXT + '")])'):
+                    search_result.drm = SearchResult.DRM_UNLOCKED
+                else:
+                    search_result.drm = SearchResult.DRM_UNKNOWN
+            else:
+                search_result.drm = SearchResult.DRM_LOCKED
+        return True
+
+if __name__ == '__main__':
+    import sys
+    for result in search_amazon(' '.join(sys.argv[1:]), write_html_to='/t/amazon.html'):
+        print (result)

src/calibre/gui2/store/stores/amazon_ca_plugin.py

@@ -1,13 +1,13 @@
-# -*- coding: utf-8 -*-
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
 
-from __future__ import (unicode_literals, division, absolute_import, print_function)
-store_version = 2  # Needed for dynamic plugin loading
-
-__license__ = 'GPL 3'
-__copyright__ = '2011, John Schember <john@nachtimwald.com>'
-__docformat__ = 'restructuredtext en'
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+store_version = 3  # Needed for dynamic plugin loading
 
 from contextlib import closing
+import urllib
 
 from lxml import html
 
@@ -18,74 +18,49 @@ from calibre.gui2 import open_url
 from calibre.gui2.store import StorePlugin
 from calibre.gui2.store.search_result import SearchResult
 
-class AmazonCAKindleStore(StorePlugin):
-    '''
-    For comments on the implementation, please see amazon_plugin.py
-    '''
+SEARCH_BASE_URL = 'http://www.amazon.ca/s/'
+SEARCH_BASE_QUERY = {'url': 'search-alias=digital-text'}
+DETAILS_URL = 'http://amazon.ca/dp/'
+STORE_LINK =  'http://www.amazon.ca'
+DRM_SEARCH_TEXT = 'Simultaneous Device Usage'
+DRM_FREE_TEXT = 'Unlimited'
 
-    search_url = 'http://www.amazon.ca/s/url=search-alias%3Ddigital-text&field-keywords='
-    details_url = 'http://amazon.ca/dp/'
-    drm_search_text = u'Simultaneous Device Usage'
-    drm_free_text = u'Unlimited'
-
-    def open(self, parent=None, detail_item=None, external=False):
-        #aff_id = {'tag': ''}
-        # Use Kovid's affiliate id 30% of the time.
-        # if random.randint(1, 10) in (1, 2, 3):
-        #    aff_id['tag'] = 'calibrebs-20'
-        # store_link = 'http://www.amazon.ca/Kindle-eBooks/b/?ie=UTF&node=1286228011&ref_=%(tag)s&ref=%(tag)s&tag=%(tag)s&linkCode=ur2&camp=1789&creative=390957' % aff_id
-        store_link = 'http://www.amazon.ca/ebooks-kindle/b/ref=sa_menu_kbo?ie=UTF8&node=2980423011'
-        if detail_item:
-            # aff_id['asin'] = detail_item
-            # store_link = 'http://www.amazon.ca/dp/%(asin)s/?tag=%(tag)s' % aff_id
-            store_link = 'http://www.amazon.ca/dp/' + detail_item + '/'
-        open_url(QUrl(store_link))
-
-    def search(self, query, max_results=10, timeout=60):
-        url = self.search_url + query.encode('ascii', 'backslashreplace').replace('%', '%25').replace('\\x', '%').replace(' ', '+')
+def search_amazon(query, max_results=10, timeout=60,
+                  write_html_to=None,
+                  base_url=SEARCH_BASE_URL,
+                  base_query=SEARCH_BASE_QUERY,
+                  field_keywords='field-keywords'
+                  ):
+    uquery = base_query.copy()
+    uquery[field_keywords] = query
+    def asbytes(x):
+        if isinstance(x, type('')):
+            x = x.encode('utf-8')
+        return x
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
     br = browser()
 
     counter = max_results
     with closing(br.open(url, timeout=timeout)) as f:
-            doc = html.fromstring(f.read())
+        raw = f.read()
+        if write_html_to is not None:
+            with open(write_html_to, 'wb') as f:
+                f.write(raw)
+        doc = html.fromstring(raw)
+        try:
+            results = doc.xpath('//div[@id="atfResults" and @class]')[0]
+        except IndexError:
+            return
 
-            if doc.xpath('//div[@id = "atfResults" and contains(@class, "grid")]'):
-                data_xpath = '//div[contains(@class, "prod")]'
-                format_xpath = (
-                        './/ul[contains(@class, "rsltGridList")]'
-                        '//span[contains(@class, "lrg") and not(contains(@class, "bld"))]/text()')
-                asin_xpath = '@name'
-                cover_xpath = './/img[contains(@class, "productImage")]/@src'
-                title_xpath = './/h3[@class="newaps"]/a//text()'
-                author_xpath = './/h3[@class="newaps"]//span[contains(@class, "reg")]//text()'
-                price_xpath = (
-                        './/ul[contains(@class, "rsltGridList")]'
-                        '//span[contains(@class, "lrg") and contains(@class, "bld")]/text()')
-            elif doc.xpath('//div[@id = "atfResults" and contains(@class, "ilresults")]'):
-                data_xpath = '//li[(@class="ilo")]'
-                format_xpath = (
-                        './/ul[contains(@class, "rsltGridList")]'
-                        '//span[contains(@class, "lrg") and not(contains(@class, "bld"))]/text()')
-                asin_xpath = '@name'
-                cover_xpath = './div[@class = "ilf"]/a/img[contains(@class, "ilo")]/@src'
-                title_xpath = './/h3[@class="newaps"]/a//text()'
-                author_xpath = './/h3[@class="newaps"]//span[contains(@class, "reg")]//text()'
-                # Results can be in a grid (table) or a column
-                price_xpath = (
-                        './/ul[contains(@class, "rsltL") or contains(@class, "rsltGridList")]'
-                        '//span[contains(@class, "lrg") and contains(@class, "bld")]/text()')
-            elif doc.xpath('//div[@id = "atfResults" and contains(@class, "list")]'):
-                data_xpath = '//div[contains(@class, "prod")]'
-                format_xpath = (
-                        './/ul[contains(@class, "rsltL")]'
-                        '//span[contains(@class, "lrg") and not(contains(@class, "bld"))]/text()')
-                asin_xpath = '@name'
-                cover_xpath = './/img[contains(@class, "productImage")]/@src'
-                title_xpath = './/h3[@class="newaps"]/a//text()'
-                author_xpath = './/h3[@class="newaps"]//span[contains(@class, "reg")]//text()'
-                price_xpath = (
-                        './/ul[contains(@class, "rsltL")]'
-                        '//span[contains(@class, "lrg") and contains(@class, "bld")]/text()')
+        if 's-result-list-parent-container' in results.get('class', ''):
+            data_xpath = "descendant-or-self::li[@class and contains(concat(' ', normalize-space(@class), ' '), ' s-result-item ')]"
+            format_xpath = './/a[@title="Kindle Edition"]/@title'
+            asin_xpath = '@data-asin'
+            cover_xpath =  "descendant-or-self::img[@class and contains(concat(' ', normalize-space(@class), ' '), ' s-access-image ')]/@src"
+            title_xpath = "descendant-or-self::h2[@class and contains(concat(' ', normalize-space(@class), ' '), ' s-access-title ')]//text()"
+            author_xpath = './/span[starts-with(text(), "by ")]/following-sibling::span//text()'
+            price_xpath = '(.//span[contains(@class, " s-price ")])[last()]//text()'
         else:
             return
 
@@ -132,20 +107,35 @@ class AmazonCAKindleStore(StorePlugin):
 
             yield s
 
+class AmazonKindleStore(StorePlugin):
+
+    def open(self, parent=None, detail_item=None, external=False):
+        store_link = (DETAILS_URL + detail_item) if detail_item else STORE_LINK
+        open_url(QUrl(store_link))
+
+    def search(self, query, max_results=10, timeout=60):
+        for result in search_amazon(query, max_results=max_results, timeout=timeout):
+            yield result
+
     def get_details(self, search_result, timeout):
-        url = self.details_url
+        url = DETAILS_URL
 
         br = browser()
         with closing(br.open(url + search_result.detail_item, timeout=timeout)) as nf:
             idata = html.fromstring(nf.read())
             if idata.xpath('boolean(//div[@class="content"]//li/b[contains(text(), "' +
-                           self.drm_search_text + '")])'):
+                           DRM_SEARCH_TEXT + '")])'):
                 if idata.xpath('boolean(//div[@class="content"]//li[contains(., "' +
-                               self.drm_free_text + '") and contains(b, "' +
-                               self.drm_search_text + '")])'):
+                               DRM_FREE_TEXT + '") and contains(b, "' +
+                               DRM_SEARCH_TEXT + '")])'):
                     search_result.drm = SearchResult.DRM_UNLOCKED
                 else:
                     search_result.drm = SearchResult.DRM_UNKNOWN
             else:
                 search_result.drm = SearchResult.DRM_LOCKED
         return True
+
+if __name__ == '__main__':
+    import sys
+    for result in search_amazon(' '.join(sys.argv[1:]), write_html_to='/t/amazon.html'):
+        print (result)

src/calibre/gui2/store/stores/amazon_in_plugin.py

@@ -0,0 +1,143 @@
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
+
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+store_version = 1  # Needed for dynamic plugin loading
+
+from contextlib import closing
+import urllib
+
+from lxml import html
+
+from PyQt5.Qt import QUrl
+
+from calibre import browser
+from calibre.gui2 import open_url
+from calibre.gui2.store import StorePlugin
+from calibre.gui2.store.search_result import SearchResult
+
+SEARCH_BASE_URL = 'http://www.amazon.in/s/'
+SEARCH_BASE_QUERY = {'url': 'search-alias=digital-text'}
+DETAILS_URL = 'http://amazon.in/dp/'
+STORE_LINK =  'http://www.amazon.in'
+DRM_SEARCH_TEXT = 'Simultaneous Device Usage'
+DRM_FREE_TEXT = 'Unlimited'
+
+def search_amazon(query, max_results=10, timeout=60,
+                  write_html_to=None,
+                  base_url=SEARCH_BASE_URL,
+                  base_query=SEARCH_BASE_QUERY,
+                  field_keywords='field-keywords'
+                  ):
+    uquery = base_query.copy()
+    uquery[field_keywords] = query
+    def asbytes(x):
+        if isinstance(x, type('')):
+            x = x.encode('utf-8')
+        return x
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
+    br = browser()
+
+    counter = max_results
+    with closing(br.open(url, timeout=timeout)) as f:
+        raw = f.read()
+        if write_html_to is not None:
+            with open(write_html_to, 'wb') as f:
+                f.write(raw)
+        doc = html.fromstring(raw)
+        try:
+            results = doc.xpath('//div[@id="atfResults" and @class]')[0]
+        except IndexError:
+            return
+
+        if 's-result-list-parent-container' in results.get('class', ''):
+            data_xpath = "descendant-or-self::li[@class and contains(concat(' ', normalize-space(@class), ' '), ' s-result-item ')]"
+            format_xpath = './/a[@title="Kindle Edition"]/@title'
+            asin_xpath = '@data-asin'
+            cover_xpath =  "descendant-or-self::img[@class and contains(concat(' ', normalize-space(@class), ' '), ' s-access-image ')]/@src"
+            title_xpath = "descendant-or-self::h2[@class and contains(concat(' ', normalize-space(@class), ' '), ' s-access-title ')]//text()"
+            author_xpath = './/span[starts-with(text(), "by ")]/following-sibling::span//text()'
+            price_xpath = '(.//span[contains(@class, " s-price ")])[last()]//text()'
+        else:
+            return
+
+        for data in doc.xpath(data_xpath):
+            if counter <= 0:
+                break
+
+            # Even though we are searching digital-text only Amazon will still
+            # put in results for non Kindle books (author pages). Se we need
+            # to explicitly check if the item is a Kindle book and ignore it
+            # if it isn't.
+            format = ''.join(data.xpath(format_xpath))
+            if 'kindle' not in format.lower():
+                continue
+
+            # We must have an asin otherwise we can't easily reference the
+            # book later.
+            asin = data.xpath(asin_xpath)
+            if asin:
+                asin = asin[0]
+            else:
+                continue
+
+            cover_url = ''.join(data.xpath(cover_xpath))
+
+            title = ''.join(data.xpath(title_xpath))
+            author = ''.join(data.xpath(author_xpath))
+            try:
+                author = author.split('by ', 1)[1].split(" (")[0]
+            except:
+                pass
+
+            price = ''.join(data.xpath(price_xpath))
+
+            counter -= 1
+
+            s = SearchResult()
+            s.cover_url = cover_url.strip()
+            s.title = title.strip()
+            s.author = author.strip()
+            s.price = price.strip()
+            if s.price:
+                s.price = '₹ ' + s.price
+            s.detail_item = asin.strip()
+            s.formats = 'Kindle'
+
+            yield s
+
+class AmazonKindleStore(StorePlugin):
+
+    def open(self, parent=None, detail_item=None, external=False):
+        store_link = (DETAILS_URL + detail_item) if detail_item else STORE_LINK
+        open_url(QUrl(store_link))
+
+    def search(self, query, max_results=10, timeout=60):
+        for result in search_amazon(query, max_results=max_results, timeout=timeout):
+            yield result
+
+    def get_details(self, search_result, timeout):
+        url = DETAILS_URL
+
+        br = browser()
+        with closing(br.open(url + search_result.detail_item, timeout=timeout)) as nf:
+            idata = html.fromstring(nf.read())
+            if idata.xpath('boolean(//div[@class="content"]//li/b[contains(text(), "' +
+                           DRM_SEARCH_TEXT + '")])'):
+                if idata.xpath('boolean(//div[@class="content"]//li[contains(., "' +
+                               DRM_FREE_TEXT + '") and contains(b, "' +
+                               DRM_SEARCH_TEXT + '")])'):
+                    search_result.drm = SearchResult.DRM_UNLOCKED
+                else:
+                    search_result.drm = SearchResult.DRM_UNKNOWN
+            else:
+                search_result.drm = SearchResult.DRM_LOCKED
+        return True
+
+if __name__ == '__main__':
+    import sys
+    for result in search_amazon(' '.join(sys.argv[1:]), write_html_to='/t/amazon.html'):
+        print (result)

src/calibre/gui2/store/stores/amazon_plugin.py

@@ -1,13 +1,13 @@
-# -*- coding: utf-8 -*-
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
 
-from __future__ import (unicode_literals, division, absolute_import, print_function)
-store_version = 10  # Needed for dynamic plugin loading
-
-__license__ = 'GPL 3'
-__copyright__ = '2011, John Schember <john@nachtimwald.com>'
-__docformat__ = 'restructuredtext en'
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+store_version = 11  # Needed for dynamic plugin loading
 
 from contextlib import closing
+import urllib
 
 from lxml import html
 
@@ -18,10 +18,27 @@ from calibre.gui2 import open_url
 from calibre.gui2.store import StorePlugin
 from calibre.gui2.store.search_result import SearchResult
 
+SEARCH_BASE_URL = 'http://www.amazon.com/s/'
+SEARCH_BASE_QUERY = {'url': 'search-alias=digital-text'}
+DETAILS_URL = 'http://amazon.com/dp/'
+STORE_LINK =  'http://www.amazon.com/Kindle-eBooks'
+DRM_SEARCH_TEXT = 'Simultaneous Device Usage'
+DRM_FREE_TEXT = 'Unlimited'
+
 def search_amazon(query, max_results=10, timeout=60,
                   write_html_to=None,
-                  search_url='http://www.amazon.com/s/?url=search-alias%3Ddigital-text&field-keywords='):
-    url = search_url + query.encode('ascii', 'backslashreplace').replace('%', '%25').replace('\\x', '%').replace(' ', '+')
+                  base_url=SEARCH_BASE_URL,
+                  base_query=SEARCH_BASE_QUERY,
+                  field_keywords='field-keywords'
+                  ):
+    uquery = base_query.copy()
+    uquery[field_keywords] = query
+    def asbytes(x):
+        if isinstance(x, type('')):
+            x = x.encode('utf-8')
+        return x
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
     br = browser()
 
     counter = max_results
@@ -129,97 +146,8 @@ def search_amazon(query, max_results=10, timeout=60,
 
 class AmazonKindleStore(StorePlugin):
 
-    details_url = 'http://amazon.com/dp/'
-    drm_search_text = u'Simultaneous Device Usage'
-    drm_free_text = u'Unlimited'
-
     def open(self, parent=None, detail_item=None, external=False):
-        '''
-        Amazon comes with a number of difficulties.
-
-        QWebView has major issues with Amazon.com. The largest of
-        issues is it simply doesn't work on a number of pages.
-
-        When connecting to a number parts of Amazon.com (Kindle library
-        for instance) QNetworkAccessManager fails to connect with a
-        NetworkError of 399 - ProtocolFailure. The strange thing is,
-        when I check QNetworkRequest.HttpStatusCodeAttribute when the
-        399 error is returned the status code is 200 (Ok). However, once
-        the QNetworkAccessManager decides there was a NetworkError it
-        does not download the page from Amazon. So I can't even set the
-        HTML in the QWebView myself.
-
-        There is http://bugreports.qt.nokia.com/browse/QTWEBKIT-259 an
-        open bug about the issue but it is not correct. We can set the
-        useragent (Arora does) to something else and the above issue
-        will persist. This http://developer.qt.nokia.com/forums/viewthread/793
-        gives a bit more information about the issue but as of now (27/Feb/2011)
-        there is no solution or work around.
-
-        We cannot change the The linkDelegationPolicy to allow us to avoid
-        QNetworkAccessManager because it only works links. Forms aren't
-        included so the same issue persists on any part of the site (login)
-        that use a form to load a new page.
-
-        Using an aStore was evaluated but I've decided against using it.
-        There are three major issues with an aStore. Because checkout is
-        handled by sending the user to Amazon we can't put it in a QWebView.
-        If we're sending the user to Amazon sending them there directly is
-        nicer. Also, we cannot put the aStore in a QWebView and let it open the
-        redirection the users default browser because the cookies with the
-        shopping cart won't transfer.
-
-        Another issue with the aStore is how it handles the referral. It only
-        counts the referral for the items in the shopping card / the item
-        that directed the user to Amazon. Kindle books do not use the shopping
-        cart and send the user directly to Amazon for the purchase. In this
-        instance we would only get referral credit for the one book that the
-        aStore directs to Amazon that the user buys. Any other purchases we
-        won't get credit for.
-
-        The last issue with the aStore is performance. Even though it's an
-        Amazon site it's alow. So much slower than Amazon.com that it makes
-        me not want to browse books using it. The look and feel are lesser
-        issues. So is the fact that it almost seems like the purchase is
-        with calibre. This can cause some support issues because we can't
-        do much for issues with Amazon.com purchase hiccups.
-
-        Another option that was evaluated was the Product Advertising API.
-        The reasons against this are complexity. It would take a lot of work
-        to basically re-create Amazon.com within calibre. The Product
-        Advertising API is also designed with being run on a server not
-        in an app. The signing keys would have to be made avaliable to ever
-        calibre user which means bad things could be done with our account.
-
-        The Product Advertising API also assumes the same browser for easy
-        shopping cart transfer to Amazon. With QWebView not working and there
-        not being an easy way to transfer cookies between a QWebView and the
-        users default browser this won't work well.
-
-        We could create our own website on the calibre server and create an
-        Amazon Product Advertising API store. However, this goes back to the
-        complexity argument. Why spend the time recreating Amazon.com
-
-        The final and largest issue against using the Product Advertising API
-        is the Efficiency Guidelines:
-
-        "Each account used to access the Product Advertising API will be allowed
-        an initial usage limit of 2,000 requests per hour. Each account will
-        receive an additional 500 requests per hour (up to a maximum of 25,000
-        requests per hour) for every $1 of shipped item revenue driven per hour
-        in a trailing 30-day period. Usage thresholds are recalculated daily based
-        on revenue performance."
-
-        With over two million users a limit of 2,000 request per hour could
-        render our store unusable for no other reason than Amazon rate
-        limiting our traffic.
-
-        The best (I use the term lightly here) solution is to open Amazon.com
-        in the users default browser and set the affiliate id as part of the url.
-        '''
-        store_link = 'http://www.amazon.com/Kindle-eBooks'
-        if detail_item:
-            store_link = 'http://www.amazon.com/dp/%s' % detail_item
+        store_link = (DETAILS_URL + detail_item) if detail_item else STORE_LINK
         open_url(QUrl(store_link))
 
     def search(self, query, max_results=10, timeout=60):
@@ -227,16 +155,16 @@ class AmazonKindleStore(StorePlugin):
             yield result
 
     def get_details(self, search_result, timeout):
-        url = self.details_url
+        url = DETAILS_URL
 
         br = browser()
         with closing(br.open(url + search_result.detail_item, timeout=timeout)) as nf:
             idata = html.fromstring(nf.read())
             if idata.xpath('boolean(//div[@class="content"]//li/b[contains(text(), "' +
-                           self.drm_search_text + '")])'):
+                           DRM_SEARCH_TEXT + '")])'):
                 if idata.xpath('boolean(//div[@class="content"]//li[contains(., "' +
-                               self.drm_free_text + '") and contains(b, "' +
-                               self.drm_search_text + '")])'):
+                               DRM_FREE_TEXT + '") and contains(b, "' +
+                               DRM_SEARCH_TEXT + '")])'):
                     search_result.drm = SearchResult.DRM_UNLOCKED
                 else:
                     search_result.drm = SearchResult.DRM_UNKNOWN