morss/crawler.py

@@ -27,14 +27,13 @@ except NameError:
 
 MIMETYPE = {
     'xml': ['text/xml', 'application/xml', 'application/rss+xml', 'application/rdf+xml', 'application/atom+xml', 'application/xhtml+xml'],
-    'rss': ['application/rss+xml', 'application/rdf+xml', 'application/atom+xml'],
     'html': ['text/html', 'application/xhtml+xml', 'application/xml']}
 
 
 DEFAULT_UA = 'Mozilla/5.0 (X11; Linux x86_64; rv:25.0) Gecko/20100101 Firefox/25.0'
 
 
-def custom_handler(follow=None, delay=None, encoding=None):
+def custom_handler(accept=None, strict=False, delay=None, encoding=None, basic=False):
     handlers = []
 
     # as per urllib2 source code, these Handelers are added first
@@ -52,12 +51,14 @@ def custom_handler(follow=None, delay=None, encoding=None):
     handlers.append(HTTPEquivHandler())
     handlers.append(HTTPRefreshHandler())
     handlers.append(UAHandler(DEFAULT_UA))
-    handlers.append(AutoRefererHandler())
+
+    if not basic:
+        handlers.append(AutoRefererHandler())
 
     handlers.append(EncodingFixHandler(encoding))
 
-    if follow:
-        handlers.append(AlternateHandler(MIMETYPE[follow]))
+    if accept:
+        handlers.append(ContentNegociationHandler(MIMETYPE[accept], strict))
 
     handlers.append(CacheHandler(force_min=delay))
 
@@ -197,28 +198,43 @@ class UAHandler(BaseHandler):
 
 class AutoRefererHandler(BaseHandler):
     def http_request(self, req):
-        req.add_unredirected_header('Referer', '%s://%s' % (req.type, req.host))
+        req.add_unredirected_header('Referer', 'http://%s' % req.host)
         return req
 
     https_request = http_request
 
 
-class AlternateHandler(BaseHandler):
-    " Follow <link rel='alternate' type='application/rss+xml' href='...' /> "
+class ContentNegociationHandler(BaseHandler):
+    " Handler for content negociation. Also parses <link rel='alternate' type='application/rss+xml' href='...' /> "
 
-    def __init__(self, follow=None):
-        self.follow = follow or []
+    def __init__(self, accept=None, strict=False):
+        self.accept = accept
+        self.strict = strict
+
+    def http_request(self, req):
+        if self.accept is not None:
+            if isinstance(self.accept, basestring):
+                self.accept = (self.accept,)
+
+            string = ','.join(self.accept)
+
+            if self.strict:
+                string += ',*/*;q=0.9'
+
+            req.add_unredirected_header('Accept', string)
+
+        return req
 
     def http_response(self, req, resp):
         contenttype = resp.info().get('Content-Type', '').split(';')[0]
-        if 200 <= resp.code < 300 and len(self.follow) and contenttype in MIMETYPE['html'] and contenttype not in self.follow:
+        if 200 <= resp.code < 300 and self.accept is not None and self.strict and contenttype in MIMETYPE['html'] and contenttype not in self.accept:
             # opps, not what we were looking for, let's see if the html page suggests an alternative page of the right types
 
             data = resp.read()
             links = lxml.html.fromstring(data[:10000]).findall('.//link[@rel="alternate"]')
 
             for link in links:
-                if link.get('type', '') in self.follow:
+                if link.get('type', '') in self.accept:
                     resp.code = 302
                     resp.msg = 'Moved Temporarily'
                     resp.headers['location'] = link.get('href')
@@ -230,6 +246,7 @@ class AlternateHandler(BaseHandler):
 
         return resp
 
+    https_request = http_request
     https_response = http_response
 
 

morss/morss.py

@@ -252,7 +252,7 @@ def ItemFill(item, options, feedurl='/', fast=False):
         delay = -2
 
     try:
-        con = crawler.custom_handler(delay=delay, encoding=options.encoding).open(link, timeout=TIMEOUT)
+        con = crawler.custom_handler('html', False, delay, options.encoding).open(link, timeout=TIMEOUT)
         data = con.read()
 
     except (IOError, HTTPException) as e:
@@ -335,7 +335,8 @@ def FeedFetch(url, options):
         delay = 0
 
     try:
-        con = crawler.custom_handler(follow='rss', delay=delay, encoding=options.encoding) \
+        con = crawler.custom_handler(accept='xml', strict=True, delay=delay,
+            encoding=options.encoding, basic=not options.items) \
             .open(url, timeout=TIMEOUT * 2)
         xml = con.read()