add a simplified version of 'parse_qs'

This version only returns a dict of plain string to string key-value
pairs and ignores multiple values for the same query variable.

gallery_dl/extractor/flickr.py

@@ -10,7 +10,6 @@
 
 from .common import Extractor, Message
 from .. import text, util, exception
-import urllib.parse
 
 
 class FlickrExtractor(Extractor):
@@ -225,10 +224,7 @@ class FlickrSearchExtractor(FlickrExtractor):
 
     def __init__(self, match):
         FlickrExtractor.__init__(self, match)
-        self.search = {
+        self.search = text.parse_query(match.group(1))
-            key: vlist[0]
-            for key, vlist in urllib.parse.parse_qs(match.group(1)).items()
-        }
         if "text" not in self.search:
             self.search["text"] = ""
 

gallery_dl/extractor/pixiv.py

@@ -11,7 +11,6 @@
 from .common import Extractor, Message
 from .. import text, exception
 from ..cache import cache
-import urllib.parse
 import re
 
 
@@ -141,7 +140,7 @@ class PixivUserExtractor(PixivExtractor):
         PixivExtractor.__init__(self)
         self.user_id, tag = match.groups()
         if tag:
-            self.tag = urllib.parse.unquote(tag).lower()
+            self.tag = text.unquote(tag).lower()
             self.works = self._tagged_works
 
     def works(self):
@@ -267,7 +266,7 @@ class PixivRankingExtractor(PixivExtractor):
     test = [
         (("https://www.pixiv.net/ranking.php"
           "?mode=daily&content=illust&date=20170818"), {
-            "url": "7fdffbecfbd420b1d202fa417d79317240be30bc",
+            "url": "b073c74e3a6633dbdc9ba4122448f66e5211c771",
         }),
         ("https://www.pixiv.net/ranking.php", None),
     ]
@@ -277,10 +276,7 @@ class PixivRankingExtractor(PixivExtractor):
         self._iter = None
         self._first = None
 
-        query = {
+        query = text.parse_query(match.group(1))
-            key: vlist[0]
-            for key, vlist in urllib.parse.parse_qs(match.group(1)).items()
-        }
         self.mode = query.get("mode", "daily")
         self.content = query.get("content", "all")
         self.date = query.get("date")

gallery_dl/text.py

@@ -130,6 +130,11 @@ def extract_iter(txt, begin, end, pos=0):
         yield value
 
 
+def parse_query(qs):
+    """Parse a query string into key-value pairs"""
+    return {key: vlist[0] for key, vlist in urllib.parse.parse_qs(qs).items()}
+
+
 if os.name == "nt":
     clean_path = clean_path_windows
 else:

test/test_extractors.py

@@ -58,7 +58,7 @@ skip = [
     "exhentai", "kissmanga", "mangafox", "dynastyscans", "nijie",
     "archivedmoe", "archiveofsins", "thebarchive",
     # temporary issues
-    "imgtrex",  # 504
+    "mangapark",
 ]
 # enable selective testing for direct calls
 if __name__ == '__main__' and len(sys.argv) > 1: