import re import os import hashlib from threading import Thread import pickle import urllib import datetime from doreah import settings from doreah.logging import log ### TSV files #def parseTSV(filename,*args,escape=True): # f = open(filename) # # result = [] # for l in [l for l in f if (not l.startswith("#")) and (not l.strip()=="")]: # # l = l.replace("\n","") # if escape: # l = l.split("#")[0] # l = l.replace(r"\num","#") # translate escape sequences even if we don't support comments in the file and they are not actually necessary (they might still be used for some reason) # data = list(filter(None,l.split("\t"))) # Multiple tabs are okay, we don't accept empty fields unless trailing # entry = [] * len(args) # for i in range(len(args)): # if args[i]=="list": # try: # entry.append(data[i].split("␟")) # except: # entry.append([]) # elif args[i]=="string": # try: # entry.append(data[i]) # except: # entry.append("") # elif args[i]=="int": # try: # entry.append(int(data[i])) # except: # entry.append(0) # elif args[i]=="bool": # try: # entry.append((data[i].lower() in ["true","yes","1","y"])) # except: # entry.append(False) # # result.append(entry) # f.close() # return result def checksumTSV(folder): sums = "" for f in os.listdir(folder + "/"): if (f.endswith(".tsv")): f = open(folder + "/" + f,"rb") sums += hashlib.md5(f.read()).hexdigest() + "\n" f.close() return sums # returns whether checksums match and sets the checksum to invalid if they don't (or sets the new one if no previous one exists) def combineChecksums(filename,checksums): import os if os.path.exists(filename + ".rulestate"): f = open(filename + ".rulestate","r") oldchecksums = f.read() f.close() if oldchecksums == checksums: # the new checksum given by the calling db server represents the rule state that all current unsaved scrobbles were created under # if this is the same as the existing one, we're all good return True elif (oldchecksums != "INVALID"): #if not, the file is not consistent to any single rule state (some scrobbles were created with an old ruleset, some not) f = open(filename + ".rulestate","w") f.write("INVALID") # this will never match any sha256sum f.close() return False else: #if the file already says invalid, no need to open it and rewrite return False else: f = open(filename + ".rulestate","w") f.write(checksums) f.close() return True # checks ALL files for their rule state. if they are all the same as the current loaded one, the entire database can be assumed to be consistent with the current ruleset # in any other case, get out def consistentRulestate(folder,checksums): result = [] for scrobblefile in os.listdir(folder + "/"): if (scrobblefile.endswith(".tsv")): try: f = open(folder + "/" + scrobblefile + ".rulestate","r") if f.read() != checksums: return False except: return False finally: f.close() return True #def parseAllTSV(path,*args,escape=True): # # # result = [] # for f in os.listdir(path + "/"): # # if (f.endswith(".tsv")): # # result += parseTSV(path + "/" + f,*args,escape=escape) # # return result #def createTSV(filename): # # if not os.path.exists(filename): # open(filename,"w").close() #def addEntry(filename,a,escape=True): # # createTSV(filename) # # line = "\t".join(a) # if escape: line = line.replace("#",r"\num") # with open(filename,"a") as f: # f.write(line + "\n") #def addEntries(filename,al,escape=True): # # with open(filename,"a") as f: # for a in al: # line = "\t".join(a) # if escape: line = line.replace("#",r"\num") # f.write(line + "\n") # ### Useful functions #def int_or_none(input_): # try: # return int(input_) # except: # return None #def cleandict(d): # newdict = {k:d[k] for k in d if d[k] is not None} # d.clear() # d.update(newdict) ### Logging # now handled by doreah #def log(msg,module=None): # now = datetime.datetime.utcnow().strftime("%Y/%m/%d %H:%M:%S") # if module is None: # import inspect # module = inspect.getmodule(inspect.stack()[1][0]).__name__ # if module == "__main__": module = "mainserver" # print("[" + module + "] " + msg) # with open("logs/" + module + ".log","a") as logfile: # logfile.write(now + " " + msg + "\n") ### not meant to be precise, just for a rough idea # now handled by doreah #measurement = 0 #def clock(*args): # import time # global measurement # now = time.time() # if len(args) > 0: # print(args[0] + ": " + str(now - measurement)) # measurement = now ### Media info def apirequest(artists=None,artist=None,title=None): import urllib.parse, urllib.request import json #try: #with open("apikey","r") as keyfile: # apikey = keyfile.read().replace("\n","") apikey = settings.get_settings("LASTFM_API_KEY") if apikey is None: return None #except: # return None sites = [ { "name":"lastfm", "artisturl":"https://ws.audioscrobbler.com/2.0/?method=artist.getinfo&artist={artist}&api_key=" + apikey + "&format=json", "trackurl":"https://ws.audioscrobbler.com/2.0/?method=track.getinfo&track={title}&artist={artist}&api_key=" + apikey + "&format=json", "result_artist_imgurl":lambda data:data["artist"]["image"][3]["#text"], "result_track_imgurl":lambda data:data["track"]["album"]["image"][3]["#text"] #"result_artist_desc":lambda data:data["artist"]["bio"]["summary"], #"result_track_desc":lambda data:None } ] # TRACKS if title is not None: for s in sites: try: artiststr = urllib.parse.quote(", ".join(artists)) titlestr = urllib.parse.quote(title) response = urllib.request.urlopen(s["trackurl"].format(artist=artiststr,title=titlestr)) log("API: " + s["name"] + "; Image request: " + "/".join(artists) + " - " + title,module="external") data = json.loads(response.read()) if s["result_track_imgurl"](data) != "": return s["result_track_imgurl"](data) except: pass if len(artists) == 1: #return {"image":apirequest(artist=artists[0])["image"]} return None # try the same track with every single artist for a in artists: rec = apirequest(artists=[a],title=title) if rec is not None: return rec return None # ARTISTS else: for s in sites: try: response = urllib.request.urlopen(s["artisturl"].format(artist=urllib.parse.quote(artist))) log("API: " + s["name"] + "; Image request: " + artist,module="external") data = json.loads(response.read()) if s["result_artist_imgurl"](data) != "": return s["result_artist_imgurl"](data) except: pass return None # I think I've only just understood modules cachedTracks = {} cachedArtists = {} cachedTracksDays = {} cachedArtistsDays = {} def cache_track(artists,title,result): cachedTracks[(frozenset(artists),title)] = result day = datetime.date.today().toordinal() cachedTracksDays[(frozenset(artists),title)] = day def cache_artist(artist,result): if result is None: log("Caching None for " + artist,module="debug") cachedArtists[artist] = result day = datetime.date.today().toordinal() cachedArtistsDays[artist] = day def track_from_cache(artists,title): try: res = cachedTracks[(frozenset(artists),title)] except: # no entry there, let the calling function know raise KeyError() if res is None: retain = settings.get_settings("CACHE_EXPIRE_NEGATIVE") else: retain = settings.get_settings("CACHE_EXPIRE_POSITIVE") # if the settings say caches never expire, just return if retain is None: return res # look if entry is too old nowday = datetime.date.today().toordinal() cacheday = cachedTracksDays[(frozenset(artists),title)] if (nowday - cacheday) > retain: # fetch the new image in the background, but still return the old one for one last time log("Expired cache for " + "/".join(artists) + " - " + title) del cachedTracks[(frozenset(artists),title)] t = Thread(target=getTrackImage,args=(artists,title,)) t.start() return res def artist_from_cache(artist): try: res = cachedArtists[artist] except: # no entry there, let the calling function know raise KeyError() if res is None: retain = settings.get_settings("CACHE_EXPIRE_NEGATIVE") else: retain = settings.get_settings("CACHE_EXPIRE_POSITIVE") # if the settings say caches never expire, just return if retain is None: return res # look if entry is too old nowday = datetime.date.today().toordinal() cacheday = cachedArtistsDays[artist] if (nowday - cacheday) > retain: # fetch the new image in the background, but still return the old one for one last time log("Expired cache for " + artist) del cachedArtists[artist] t = Thread(target=getArtistImage,args=(artist,)) t.start() return res def saveCache(): fl = open("images/cache","wb") stream = pickle.dumps({"tracks":cachedTracks,"artists":cachedArtists,"tracks_days":cachedTracksDays,"artists_days":cachedArtistsDays}) fl.write(stream) fl.close() def loadCache(): try: fl = open("images/cache","rb") except: return try: ob = pickle.loads(fl.read()) global cachedTracks, cachedArtists, cachedTracksDays, cachedArtistsDays cachedTracks, cachedArtists, cachedTracksDays, cachedArtistsDays = ob["tracks"],ob["artists"],ob["tracks_days"],ob["artists_days"] #(cachedTracks, cachedArtists) = ob finally: fl.close() # remove corrupt caching from previous versions toremove = [] for k in cachedTracks: if cachedTracks[k] == "": toremove.append(k) for k in toremove: del cachedTracks[k] log("Removed invalid cache key: " + str(k)) toremove = [] for k in cachedArtists: if cachedArtists[k] == "": toremove.append(k) for k in toremove: del cachedArtists[k] log("Removed invalid cache key: " + str(k)) def getTrackImage(artists,title,fast=False): obj = (frozenset(artists),title) filename = "-".join([re.sub("[^a-zA-Z0-9]","",artist) for artist in artists]) + "_" + re.sub("[^a-zA-Z0-9]","",title) if filename == "": filename = str(hash(obj)) filepath = "images/tracks/" + filename # check if custom image exists if os.path.exists(filepath + ".png"): imgurl = "/" + filepath + ".png" return imgurl elif os.path.exists(filepath + ".jpg"): imgurl = "/" + filepath + ".jpg" return imgurl elif os.path.exists(filepath + ".jpeg"): imgurl = "/" + filepath + ".jpeg" return imgurl elif os.path.exists(filepath + ".gif"): imgurl = "/" + filepath + ".gif" return imgurl try: # check our cache # if we have cached the nonexistence of that image, we immediately return the redirect to the artist and let the resolver handle it # (even if we're not in a fast lookup right now) #result = cachedTracks[(frozenset(artists),title)] result = track_from_cache(artists,title) if result is not None: return result else: for a in artists: res = getArtistImage(artist=a,fast=True) if res != "": return res return "" except: pass # do we have an api key? apikey = settings.get_settings("LASTFM_API_KEY") if apikey is None: return "" # DO NOT CACHE THAT # fast request only retuns cached and local results, generates redirect link for rest if fast: return "/image?title=" + urllib.parse.quote(title) + "&" + "&".join(["artist=" + urllib.parse.quote(a) for a in artists]) # non-fast lookup (esentially only the resolver lookup) result = apirequest(artists=artists,title=title) # cache results (even negative ones) #cachedTracks[(frozenset(artists),title)] = result cache_track(artists,title,result) # return either result or redirect to artist if result is not None: return result else: for a in artists: res = getArtistImage(artist=a,fast=False) if res != "": return res return "" def getArtistImage(artist,fast=False): obj = artist filename = re.sub("[^a-zA-Z0-9]","",artist) if filename == "": filename = str(hash(obj)) filepath = "images/artists/" + filename #filepath_cache = "info/artists_cache/" + filename # check if custom image exists if os.path.exists(filepath + ".png"): imgurl = "/" + filepath + ".png" return imgurl elif os.path.exists(filepath + ".jpg"): imgurl = "/" + filepath + ".jpg" return imgurl elif os.path.exists(filepath + ".jpeg"): imgurl = "/" + filepath + ".jpeg" return imgurl elif os.path.exists(filepath + ".gif"): imgurl = "/" + filepath + ".gif" return imgurl try: #result = cachedArtists[artist] result = artist_from_cache(artist) if result is not None: return result else: return "" except: pass # do we have an api key? apikey = settings.get_settings("LASTFM_API_KEY") if apikey is None: return "" # DO NOT CACHE THAT # fast request only retuns cached and local results, generates redirect link for rest if fast: return "/image?artist=" + urllib.parse.quote(artist) # non-fast lookup (esentially only the resolver lookup) result = apirequest(artist=artist) # cache results (even negative ones) #cachedArtists[artist] = result cache_artist(artist,result) if result is not None: return result else: return "" def getTrackImages(trackobjectlist,fast=False): threads = [] for track in trackobjectlist: t = Thread(target=getTrackImage,args=(track["artists"],track["title"],),kwargs={"fast":fast}) t.start() threads.append(t) for t in threads: t.join() return [getTrackImage(t["artists"],t["title"]) for t in trackobjectlist] def getArtistImages(artistlist,fast=False): threads = [] for artist in artistlist: t = Thread(target=getArtistImage,args=(artist,),kwargs={"fast":fast}) t.start() threads.append(t) for t in threads: t.join() # async calls only cached results, now we need to get them return [getArtistImage(a) for a in artistlist] # new way of serving images # instead always generate a link locally, but redirect that on the fly # this way the page can load faster and images will trickle in without having to resort to XHTTP requests def resolveImage(artist=None,track=None): if track is not None: return getTrackImage(track["artists"],track["title"]) elif artist is not None: return getArtistImage(artist)