give downloader classes proper names

gallery_dl/downloader/__init__.py

@@ -20,7 +20,7 @@ def find(scheme):
         try:
             if "." not in scheme:  # prevent relative imports
                 module = importlib.import_module("." + scheme, __package__)
-                klass = module.Downloader
+                klass = module.__downloader__
         except (ImportError, AttributeError, TypeError):
             pass
         _cache[scheme] = klass

gallery_dl/downloader/http.py

@@ -15,7 +15,7 @@ from .common import DownloaderBase
 from .. import text, exception
 
 
-class Downloader(DownloaderBase):
+class HttpDownloader(DownloaderBase):
     scheme = "http"
 
     def __init__(self, extractor, output):
@@ -123,3 +123,6 @@ MIMETYPE_MAP = {
     "application/ogg": "ogg",
     "application/octet-stream": "bin",
 }
+
+
+__downloader__ = HttpDownloader

gallery_dl/downloader/text.py

@@ -11,7 +11,7 @@
 from .common import DownloaderBase
 
 
-class Downloader(DownloaderBase):
+class TextDownloader(DownloaderBase):
     scheme = "text"
 
     def __init__(self, extractor, output):
@@ -32,3 +32,6 @@ class Downloader(DownloaderBase):
     @staticmethod
     def get_extension():
         return "txt"
+
+
+__downloader__ = TextDownloader

gallery_dl/downloader/ytdl.py

@@ -14,7 +14,7 @@ from .. import text
 import os
 
 
-class Downloader(DownloaderBase):
+class YoutubeDLDownloader(DownloaderBase):
     scheme = "ytdl"
 
     def __init__(self, extractor, output):
@@ -70,3 +70,6 @@ class Downloader(DownloaderBase):
         for entry in info_dict["entries"]:
             self.ytdl.process_info(entry)
         return True
+
+
+__downloader__ = YoutubeDLDownloader