Refactoring metalink class

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

aqt/installer.py

@@ -27,7 +27,7 @@ import platform
 import requests
 import sys
 import traceback
-import aqt.metalink
+import xml.etree.ElementTree as ElementTree
 from six import StringIO
 from multiprocessing.dummy import Pool
 from operator import and_
@@ -50,16 +50,10 @@ def _get(url, stream=False, mirror=True):
             blacklist = ['http://mirrors.ustc.edu.cn',
                          'http://mirrors.tuna.tsinghua.edu.cn',
                          'http://mirrors.geekpie.club']
-            for b in blacklist:
-                if newurl.startswith(b):
-                    mml = aqt.metalink.Metalink(url)
+            mml = Metalink(url)
             newurl = mml.altlink(blacklist=blacklist)
-                    break
-            try:
-                r = requests.get(newurl, stream=stream)
-            except requests.exceptions.ConnectionError as e:
             print('Redirected to new URL: {}'.format(newurl))
-                raise e
+            r = requests.get(newurl, stream=stream)
     else:
         r = requests.get(url, stream=True)
     return r
@@ -147,3 +141,47 @@ class QtInstaller:
                 raise e
         else:
             exit(1)
+
+
+
+class Metalink:
+    '''Download .meta4 metalink version4 xml file and parse it.'''
+
+    def __init__(self, url):
+        self.mirrors = {}
+        self.url = url
+        try:
+            m = requests.get(url + '.meta4')
+        except:
+            return
+        else:
+            mirror_xml = ElementTree.fromstring(m.text)
+            for f in mirror_xml.iter("{urn:ietf:params:xml:ns:metalink}file"):
+                for u in f.iter("{urn:ietf:params:xml:ns:metalink}url"):
+                    pri = u.attrib['priority']
+                    self.mirrors[pri] = u.text
+
+    def altlink(self, priority=None, blacklist=None):
+        if len(self.mirrors) == 0:
+            # no alternative
+            return self.url
+        if priority is None:
+            if blacklist is not None:
+                for ind in range(len(self.mirrors)):
+                    mirror = self.mirrors[str(ind + 1)]
+                    black = False
+                    for b in blacklist:
+                        if mirror.startswith(b):
+                            black = True
+                            continue
+                    if black:
+                        continue
+                    return mirror
+            else:
+                for ind in range(len(self.mirrors)):
+                    mirror = self.mirrors[str(ind + 1)]
+                    if mirror == self.candidate:
+                        continue
+                    return mirror
+        else:
+            return self.mirrors[str(priority)]

aqt/metalink.py

@@ -1,67 +0,0 @@
-#!/usr/bin/env python3
-#
-# Copyright (C) 2018 Linus Jahn <lnj@kaidan.im>
-# Copyright (C) 2019 Hiroshi Miura <miurahr@linux.com>
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy of
-# this software and associated documentation files (the "Software"), to deal in
-# the Software without restriction, including without limitation the rights to
-# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-# the Software, and to permit persons to whom the Software is furnished to do so,
-# subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in all
-# copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-import requests
-import xml.etree.ElementTree as ElementTree
-
-
-class Metalink:
-    '''Download .meta4 metalink version4 xml file and parse it.'''
-
-    def __init__(self, url, candidate=None):
-        self.mirrors = {}
-        self.url = url
-        self.candidate = candidate
-        m = requests.get(url + '.meta4')
-        mirror_xml = ElementTree.fromstring(m.text)
-        for f in mirror_xml.iter("{urn:ietf:params:xml:ns:metalink}file"):
-            for u in f.iter("{urn:ietf:params:xml:ns:metalink}url"):
-                pri = u.attrib['priority']
-                self.mirrors[pri] = u.text
-
-    def altlink(self, priority=None, blacklist=None):
-        if len(self.mirrors) == 0:
-            # no alternative
-            if self.candidate is not None:
-                return self.candidate
-            else:
-                return self.url
-        if priority is None:
-            if blacklist is not None:
-                for ind in range(len(self.mirrors)):
-                    mirror = self.mirrors[str(ind + 1)]
-                    black = False
-                    for b in blacklist:
-                        if mirror.startswith(b):
-                            black = True
-                            continue
-                    if black:
-                        continue
-                    return mirror
-            else:
-                for ind in range(len(self.mirrors)):
-                    mirror = self.mirrors[str(ind + 1)]
-                    if mirror == self.candidate:
-                        continue
-                    return mirror
-        else:
-            return self.mirrors[str(priority)]