def pipe_fetchdata(context, _INPUT, conf, **kwargs):
"""This source fetches and parses any XML or JSON file (todo iCal or KML) to yield a list of elements.
Keyword arguments:
context -- pipeline context
_INPUT -- not used
conf:
URL -- url
path -- path to list
Yields (_OUTPUT):
elements
"""
urls = conf['URL']
if not isinstance(urls, list):
urls = [urls]
for item in _INPUT:
for item_url in urls:
url = util.get_value(item_url, item, **kwargs)
if not '://' in url:
url = 'http://' + url
path = util.get_value(conf['path'], item, **kwargs)
match = None
#Parse the file into a dictionary
try:
f = urllib2.urlopen(url)
ft = ElementTree.parse(f)
if context.verbose:
print "pipe_fetchdata loading xml:", url
root = ft.getroot()
#Move to the point referenced by the path
#todo lxml would simplify and speed up this
if path:
if root.tag[0] == '{':
namespace = root.tag[1:].split("}")[0]
for i in path.split(".")[:-1]:
root = root.find("{%s}%s" % (namespace, i))
if root is None:
return
match = "{%s}%s" % (namespace, path.split(".")[-1])
else:
match = "%s" % (path.split(".")[-1])
#Convert xml into generation of dicts
if match:
for element in root.findall(match):
i = util.etree_to_pipes(element)
yield i
else:
i = util.etree_to_pipes(root)
yield i
except Exception, e:
try:
f = urllib2.urlopen(url)
d = json.load(f)
#todo test:-
if context.verbose:
print "pipe_fetchdata loading json:", url
if path:
for i in path.split(".")[:-1]:
d = d.get(i)
match = path.split(".")[-1]
if match:
for itemd in d:
if not match or itemd == match:
if isinstance(d[itemd], list):
for nested_item in d[itemd]:
yield nested_item
else:
yield [d[itemd]]
else:
yield d
except Exception, e:
#todo try iCal and yield
#todo try KML and yield
if context.verbose:
print "xml and json both failed:"
raise
def pipe_fetchdata(context, _INPUT, conf, **kwargs):
"""This source fetches and parses any XML or JSON file (todo iCal or KML) to yield a list of elements.
Keyword arguments:
context -- pipeline context
_INPUT -- not used
conf:
URL -- url
path -- path to list
Yields (_OUTPUT):
elements
"""
url = util.get_value(conf['URL'], None, **kwargs) #todo use subkey?
if not '://' in url:
url = 'http://' + url
path = util.get_value(conf['path'], None, **kwargs) #todo use subkey?
match = None
#Parse the file into a dictionary
try:
f = urllib2.urlopen(url)
ft = ElementTree.parse(f)
if context.verbose:
print "pipe_fetchdata loading xml:", url
root = ft.getroot()
#Move to the point referenced by the path
#todo lxml would simplify and speed up this
if path:
if root.tag[0] == '{':
namespace = root.tag[1:].split("}")[0]
for i in path.split(".")[:-1]:
root = root.find("{%s}%s" % (namespace, i))
if root is None:
return
match = "{%s}%s" % (namespace, path.split(".")[-1])
else:
match = "%s" % (path.split(".")[-1])
#Convert xml into generation of dicts
if match:
for element in root.findall(match):
i = util.etree_to_pipes(element)
yield i
else:
i = util.etree_to_pipes(root)
yield i
except Exception, e:
try:
f = urllib2.urlopen(url)
d = json.load(f)
#todo test:-
if context.verbose:
print "pipe_fetchdata loading json:", url
if path:
for i in path.split(".")[:-1]:
d = d.get(i)
match = path.split(".")[-1]
if match:
for item in d:
if not match or item == match:
if isinstance(d[item], list):
for nested_item in d[item]:
yield nested_item
else:
yield d[item]
else:
yield d
except Exception, e:
#todo try iCal and yield
#todo try KML and yield
if context.verbose:
print "xml and json both failed:"
raise
def pipe_xpathfetchpage(context, _INPUT, conf, **kwargs):
"""XPath Fetch Page module
_INPUT -- not used since this does not have inputs.
conf:
URL -- url object contain the URL to download
xpath -- xpath to extract
html5 -- use html5 parser?
useAsString -- emit items as string?
Description: http://pipes.yahoo.com/pipes/docs?doc=sources#XPathFetchPage
TODOS:
- don't retrieve pages larger than 1.5MB
- don't retrieve if page is not indexable.
"""
urls = conf['URL']
if not isinstance(urls, list):
urls = [urls]
for item in _INPUT:
for item_url in urls:
url = util.get_value(item_url, item, **kwargs)
if context.verbose:
print "XPathFetchPage: Preparing to download:", url
try:
request = urllib2.Request(url)
request.add_header('User-Agent', 'Yahoo Pipes 1.0')
request = urllib2.build_opener().open(request)
content = unicode(
request.read(),
request.headers['content-type'].split('charset=')[-1])
# TODO it seems that Yahoo! converts relative links to absolute
# TODO this needs to be done on the content but seems to be a non-trival
# TODO task python?
xpath = util.get_value(conf["xpath"], _INPUT, **kwargs)
html5 = False
useAsString = False
if "html5" in conf:
html5 = util.get_value(conf["html5"], _INPUT,
**kwargs) == "true"
if "useAsString" in conf:
useAsString = util.get_value(conf["useAsString"], _INPUT,
**kwargs) == "true"
if html5:
#from lxml.html import html5parser
#root = html5parser.fromstring(content)
from html5lib import parse
root = parse(content,
treebuilder='lxml',
namespaceHTMLElements=False)
else:
from lxml import etree
root = etree.HTML(content)
res_items = root.xpath(xpath)
if context.verbose:
print "XPathFetchPage: found count items:", len(res_items)
for res_item in res_items:
i = util.etree_to_pipes(
res_item) #TODO xml_to_dict(res_item)
if context.verbose:
print "--------------item data --------------------"
print i
print "--------------EOF item data ----------------"
if useAsString:
yield {"content": unicode(i)}
else:
yield i
except Exception, e:
if context.verbose:
print "XPathFetchPage: failed to retrieve from:", url
print "----------------- XPathFetchPage -----------------"
import traceback
traceback.print_exc()
print "----------------- XPathFetchPage -----------------"
raise
if item == True: #i.e. this is being fed forever, i.e. not in a loop, so we just yield our item once
break
def pipe_xpathfetchpage(context, _INPUT, conf, **kwargs):
"""XPath Fetch Page module
_INPUT -- not used since this does not have inputs.
conf:
URL -- url object contain the URL to download
xpath -- xpath to extract
html5 -- use html5 parser?
useAsString -- emit items as string?
Description: http://pipes.yahoo.com/pipes/docs?doc=sources#XPathFetchPage
TODOS:
- don't retrieve pages larger than 1.5MB
- don't retrieve if page is not indexable.
"""
urls = conf['URL']
if not isinstance(urls, list):
urls = [urls]
for item in _INPUT:
for item_url in urls:
url = util.get_value(item_url, item, **kwargs)
if context.verbose:
print "XPathFetchPage: Preparing to download:",url
try:
request = urllib2.Request(url)
request.add_header('User-Agent','Yahoo Pipes 1.0')
request = urllib2.build_opener().open(request)
content = unicode(request.read(),
request.headers['content-type'].split('charset=')[-1])
# TODO it seems that Yahoo! converts relative links to absolute
# TODO this needs to be done on the content but seems to be a non-trival
# TODO task python?
xpath = util.get_value(conf["xpath"], _INPUT, **kwargs)
html5 = False
useAsString = False
if "html5" in conf:
html5 = util.get_value(conf["html5"], _INPUT, **kwargs) == "true"
if "useAsString" in conf:
useAsString = util.get_value(conf["useAsString"], _INPUT, **kwargs) == "true"
if html5:
#from lxml.html import html5parser
#root = html5parser.fromstring(content)
from html5lib import parse
root = parse(content, treebuilder='lxml', namespaceHTMLElements=False)
else:
from lxml import etree
root = etree.HTML(content)
res_items = root.xpath(xpath)
if context.verbose:
print "XPathFetchPage: found count items:",len(res_items)
for res_item in res_items:
i = util.etree_to_pipes(res_item) #TODO xml_to_dict(res_item)
if context.verbose:
print "--------------item data --------------------"
print i
print "--------------EOF item data ----------------"
if useAsString:
yield { "content" : unicode(i) }
else:
yield i
except Exception, e:
if context.verbose:
print "XPathFetchPage: failed to retrieve from:", url
print "----------------- XPathFetchPage -----------------"
import traceback
traceback.print_exc()
print "----------------- XPathFetchPage -----------------"
raise
if item == True: #i.e. this is being fed forever, i.e. not in a loop, so we just yield our item once
break
def pipe_xpathfetchpage(context, _INPUT, conf, **kwargs):
"""XPath Fetch Page module
_INPUT -- not used since this does not have inputs.
conf:
URL -- url object contain the URL to download
xpath -- xpath to extract
html5 -- use html5 parser?
useAsString -- emit items as string?
Description: http://pipes.yahoo.com/pipes/docs?doc=sources#XPathFetchPage
TODOS:
- don't retrieve pages larger than 1.5MB
- don't retrieve if page is not indexable.
"""
urls = conf['URL']
if not isinstance(urls, list):
urls = [urls]
for item in _INPUT:
for item_url in urls:
url = util.get_value(item_url, item, **kwargs)
if context.verbose:
print "XPathFetchPage: Preparing to download:",url
try:
content = util.fetch_url(url)
xpath = util.get_value(conf["xpath"], _INPUT, **kwargs)
html5 = False
useAsString = False
if "html5" in conf:
html5 = util.get_value(conf["html5"], _INPUT, **kwargs) == "true"
if "useAsString" in conf:
useAsString = util.get_value(conf["useAsString"], _INPUT, **kwargs) == "true"
if html5:
#from lxml.html import html5parser
#root = html5parser.fromstring(content)
from html5lib import parse
root = parse(content, treebuilder='lxml', namespaceHTMLElements=False)
else:
from lxml import etree
root = etree.HTML(content)
res_items = root.xpath(xpath)
if context.verbose:
print "XPathFetchPage: found count items:",len(res_items)
if len(res_items) == 0:
print "Content: %s" % content
for res_item in res_items:
i = util.etree_to_pipes(res_item) #TODO xml_to_dict(res_item)
if context.verbose:
print "--------------item data --------------------"
print i
print "--------------EOF item data ----------------"
if useAsString:
yield { "content" : unicode(i) }
else:
yield i
except Exception, e:
if context.verbose:
print "XPathFetchPage: failed to retrieve from:", url
print "----------------- XPathFetchPage -----------------"
import traceback
traceback.print_exc()
print "----------------- XPathFetchPage -----------------"
raise
if item == True: #i.e. this is being fed forever, i.e. not in a loop, so we just yield our item once
break
