Initial concept

maloja/thirdparty/common/lastfm.py

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+import hashlib
+import urllib
+
+class LastFMInterface:
+	def query_compose(self,parameters):
+		m = hashlib.md5()
+		keys = sorted(str(k) for k in parameters)
+		m.update(self.utf("".join(str(k) + str(parameters[k]) for k in keys)))
+		m.update(self.utf(get_settings("LASTFM_API_SECRET")))
+		sig = m.hexdigest()
+		return urllib.parse.urlencode(parameters) + "&api_sig=" + sig
+
+	def utf(self,st):
+		return st.encode(encoding="UTF-8")

maloja/thirdparty/scrobble/__init__.py

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+import xml.etree.ElementTree as ElementTree
+import urllib
+
+class ScrobbleInterface:
+
+	required_settings = []
+	activated_setting = ""
+
+	def active(self):
+		return (
+			all(get_settings(settingname) not in [None,"ASK"] for settingname in self.required_settings) and
+			get_settings(self.activated_setting)
+		)
+
+	def scrobble(self,artists,title,timestamp):
+		response = urllib.request.urlopen(self.scrobbleurl,data=self.postdata(artists,title,timestamp))
+		responsedata = response.read()
+		if self.response_type == "xml":
+			data = ElementTree.fromstring(responsedata)
+			return self.parse_response(data)

maloja/thirdparty/scrobble/lastfm.py

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+from . import ScrobbleInterface
+
+from doreah.settings import get_settings
+
+class LastFMScrobbler(ScrobbleInterface,LastFMInterface):
+
+	scrobbleurl = "http://ws.audioscrobbler.com/2.0/"
+	required_settings = [
+		"LASTFM_API_KEY",
+		"LASTFM_API_SK",
+		"LASTFM_API_SECRET"
+	]
+	activated_setting = "SCROBBLE_LASTFM"
+
+	def parse_response(self,data):
+		return data.attrib.get("status") == "ok" and data.find("scrobbles").attrib.get("ignored") == "0"
+
+	def postdata(self,artists,title,timestamp):
+		return self.query_compose({
+			"method":"track.scrobble",
+			"artist[0]":", ".join(artists),
+			"track[0]":title,
+			"timestamp":timestamp,
+			"api_key":get_settings("LASTFM_API_KEY"),
+			"sk":get_settings("LASTFM_API_SK")
+		})