use consistent names for URL constants

root := <scheme>://<host>
base_url := <root>/<common path>

gallery_dl/extractor/dynastyscans.py

@@ -26,23 +26,23 @@ class DynastyscansChapterExtractor(Extractor):
     test = [
         (("http://dynasty-scans.com/chapters/"
           "hitoribocchi_no_oo_seikatsu_ch33"), {
-            "url": "ff79ea9956522a8dafd261c1fbe3c74aa8470dc5",
+            "url": "dce64e8c504118f1ab4135c00245ea12413896cb",
             "keyword": "fb2f470b995df5b301ccede31ed9829a010236db",
         }),
         (("http://dynasty-scans.com/chapters/"
           "new_game_the_spinoff_special_13"), {
-            "url": "2cd5e04bd16f842dc884c145a44cf0c64ec27a21",
+            "url": "dbe5bbb74da2edcfb1832895a484e2a40bc8b538",
             "keyword": "281bbe0fb74b812ced595619ca5876983490dc0e",
         }),
     ]
-    url_base = "https://dynasty-scans.com/"
+    root = "https://dynasty-scans.com"
 
     def __init__(self, match):
         Extractor.__init__(self)
         self.chaptername = match.group(1)
 
     def items(self):
-        page = self.request(self.url_base + "chapters/" + self.chaptername,
+        page = self.request(self.root + "/chapters/" + self.chaptername,
                             encoding="utf-8").text
         data = self.get_job_metadata(page)
         imgs = self.get_image_data(page)
@@ -50,7 +50,7 @@ class DynastyscansChapterExtractor(Extractor):
         yield Message.Version, 1
         yield Message.Directory, data
         for data["page"], img in enumerate(imgs, 1):
-            url = self.url_base + img["image"]
+            url = self.root + img["image"]
             text.nameext_from_url(url, data)
             data["name"] = img["name"]
             yield Message.Url, url, data

gallery_dl/extractor/hentaifoundry.py

@@ -29,7 +29,7 @@ class HentaifoundryUserExtractor(Extractor):
             "exception": exception.NotFoundError,
         }),
     ]
-    url_base = "https://www.hentai-foundry.com/pictures/user/"
+    base_url = "https://www.hentai-foundry.com/pictures/user/"
 
     def __init__(self, match):
         Extractor.__init__(self)
@@ -50,18 +50,18 @@ class HentaifoundryUserExtractor(Extractor):
         needle = 'thumbTitle"><a href="/pictures/user/'
         for _ in range((count-1) // 25 + 1):
             pos = 0
-            url = self.url_base + self.artist + "/page/" + str(num)
+            url = self.base_url + self.artist + "/page/" + str(num)
             page = self.request(url).text
             for _ in range(25):
                 part, pos = text.extract(page, needle, '"', pos)
                 if not part:
                     return
-                yield self.get_image_metadata(self.url_base + part)
+                yield self.get_image_metadata(self.base_url + part)
             num += 1
 
     def get_job_metadata(self):
         """Collect metadata for extractor-job"""
-        url = self.url_base + self.artist + "?enterAgree=1"
+        url = self.base_url + self.artist + "?enterAgree=1"
         response = self.request(url, fatal=False)
         if response.status_code == 404:
             raise exception.NotFoundError("user")
@@ -73,15 +73,14 @@ class HentaifoundryUserExtractor(Extractor):
     def get_image_metadata(self, url):
         """Collect metadata for an image"""
         page = self.request(url).text
-        offset = len(self.url_base) + len(self.artist)
-        index = text.extract(url, '/', '/', offset)[0]
+        index = url.rsplit("/", 2)[1]
         title, pos = text.extract(
             page, 'Pictures</a> &raquo; <span>', '<')
-        url, pos = text.extract(
+        part, pos = text.extract(
             page, '//pictures.hentai-foundry.com', '"', pos)
         data = {"index": util.safe_int(index), "title": text.unescape(title)}
-        text.nameext_from_url(url, data)
-        return "https://pictures.hentai-foundry.com" + url, data
+        text.nameext_from_url(part, data)
+        return "https://pictures.hentai-foundry.com" + part, data
 
     def set_filters(self, token):
         """Set site-internal filters to show all images"""

gallery_dl/extractor/imagebam.py

@@ -25,7 +25,7 @@ class ImagebamGalleryExtractor(AsynchronousExtractor):
         "keyword": "0ab7bef5cf995d9229dc900dc508311cefb32306",
         "content": "596e6bfa157f2c7169805d50075c2986549973a8",
     })]
-    url_base = "http://www.imagebam.com"
+    root = "http://www.imagebam.com"
 
     def __init__(self, match):
         AsynchronousExtractor.__init__(self)
@@ -44,7 +44,7 @@ class ImagebamGalleryExtractor(AsynchronousExtractor):
 
     def get_job_metadata(self):
         """Collect metadata for extractor-job"""
-        url = self.url_base + "/gallery/" + self.gkey
+        url = self.root + "/gallery/" + self.gkey
         page = self.request(url, encoding="utf-8").text
         data, pos = text.extract_all(page, (
             (None       , "<img src='/img/icons/photos.png'", ""),
@@ -59,7 +59,7 @@ class ImagebamGalleryExtractor(AsynchronousExtractor):
         """Yield all image-urls and -ids for a gallery"""
         done = False
         while not done:
-            page = self.request(self.url_base + url).text
+            page = self.request(self.root + url).text
             pos = text.extract(
                 page, 'class="btn btn-default" title="Next">', ''
             )[1]

gallery_dl/extractor/imgbox.py

@@ -16,7 +16,7 @@ import re
 class ImgboxExtractor(Extractor):
     """Base class for imgbox extractors"""
     category = "imgbox"
-    url_base = "https://imgbox.com"
+    root = "https://imgbox.com"
 
     def items(self):
         data = self.get_job_metadata()
@@ -24,7 +24,7 @@ class ImgboxExtractor(Extractor):
         yield Message.Directory, data
 
         for image_key in self.get_image_keys():
-            imgpage = self.request(self.url_base + "/" + image_key).text
+            imgpage = self.request(self.root + "/" + image_key).text
             imgdata = self.get_image_metadata(imgpage)
             if imgdata["filename"]:
                 imgdata.update(data)
@@ -85,7 +85,7 @@ class ImgboxGalleryExtractor(AsynchronousExtractor, ImgboxExtractor):
         self.image_keys = []
 
     def get_job_metadata(self):
-        page = self.request(self.url_base + "/g/" + self.gallery_key).text
+        page = self.request(self.root + "/g/" + self.gallery_key).text
         if "The specified gallery could not be found." in page:
             raise exception.NotFoundError("gallery")
         self.image_keys = re.findall(r'<a href="/([^"]+)"><img alt="', page)

gallery_dl/extractor/imgchili.py

@@ -15,13 +15,13 @@ from .. import text
 class ImgchiliExtractor(Extractor):
     """Base class for imgchili extractors"""
     category = "imgchili"
-    url_base = "https://imgchili.net/"
+    root = "https://imgchili.net"
 
     def __init__(self, match):
         Extractor.__init__(self)
         self.url = match.group(0)
         self.match = match
-        self.session.headers["Referer"] = self.url_base
+        self.session.headers["Referer"] = self.root
 
     def items(self):
         page = self.request(self.url, encoding="utf-8").text

gallery_dl/extractor/senmanga.py

@@ -21,22 +21,22 @@ class SenmangaChapterExtractor(Extractor):
     pattern = [r"(?:https?://)?raw\.senmanga\.com/([^/]+/[^/]+)"]
     test = [
         ("http://raw.senmanga.com/Bokura-wa-Minna-Kawaisou/37A/1", {
-            "url": "32d88382fcad66859d089cd9a61249f375492ec5",
+            "url": "5f95140ff511d8497e2ec08fa7267c6bb231faec",
             "keyword": "705d941a150765edb33cd2707074bd703a93788c",
             "content": "a791dda85ac0d37e3b36d754560cbb65b8dab5b9",
         }),
         ("http://raw.senmanga.com/Love-Lab/2016-03/1", {
-            "url": "d4f37c7347e56a09f9679d63c1f24cd32621d0b8",
+            "url": "8347b9f00c14b864dd3c19a1f5ae52adb2ef00de",
             "keyword": "4e72e4ade57671ad0af9c8d81feeff4259d5bbec",
         }),
     ]
-    url_base = "http://raw.senmanga.com"
+    root = "https://raw.senmanga.com"
 
     def __init__(self, match):
         Extractor.__init__(self)
         part = match.group(1)
-        self.chapter_url = "{}/{}/".format(self.url_base, part)
-        self.img_url = "{}/viewer/{}/".format(self.url_base, part)
+        self.chapter_url = "{}/{}/".format(self.root, part)
+        self.img_url = "{}/viewer/{}/".format(self.root, part)
         self.session.headers["Referer"] = self.chapter_url
         self.session.headers["User-Agent"] = "Mozilla 5.0"