整理代码逻辑

spider/HtmlDownloader.py

@@ -12,61 +12,36 @@
 
 
 class Html_Downloader(object):
-    @classmethod
-    def download(self, url):
-        count = 0  # 重试次数
-        r = ''
+    @staticmethod
+    def download(url):
         try:
             r = requests.get(url=url, headers=config.HEADER, timeout=config.TIMEOUT)
             r.encoding = chardet.detect(r.content)['encoding']
+            if (not r.ok) or len(r.content) < 500:
+                raise ConnectionError
+            else:
+                return r.text
+
+        except Exception:
+            count = 0  # 重试次数
+            proxylist = sqlhelper.select(10)
+            if not proxylist:
+                return None
+
             while count < config.RETRY_TIME:
-                if (not r.ok) or len(r.content) < 500:
-                    proxylist = sqlhelper.select(10)
+                try:
                     proxy = random.choice(proxylist)
                     ip = proxy[0]
                     port = proxy[1]
                     proxies = {"http": "http://%s:%s" % (ip, port), "https": "http://%s:%s" % (ip, port)}
-                    try:
-                        r = requests.get(url=url, headers=config.HEADER, timeout=config.TIMEOUT, proxies=proxies)
-                        r.encoding = chardet.detect(r.content)['encoding']
-                        count += 1
-                    except Exception as e:
-                        count += 1
-
-                else:
-                    return r.text
-
-            return None
-
-        except Exception as e:
-            while count < config.RETRY_TIME:
-                if r == '' or (not r.ok) or len(r.content) < 500:
-                    try:
-                        proxylist = sqlhelper.select(10)
-                        proxy = random.choice(proxylist)
-                        ip = proxy[0]
-                        port = proxy[1]
-                        proxies = {"http": "http://%s:%s" % (ip, port), "https": "http://%s:%s" % (ip, port)}
-                        try:
-                            r = requests.get(url=url, headers=config.HEADER, timeout=config.TIMEOUT, proxies=proxies)
-                            r.encoding = chardet.detect(r.content)['encoding']
-                            count += 1
-                        except Exception as e:
-                            count += 1
-
-                    except Exception as e:
-                        return None
-
-                else:
-                    return r.text
-
-            return None
-
-
-
-
-
-
-
 
+                    r = requests.get(url=url, headers=config.HEADER, timeout=config.TIMEOUT, proxies=proxies)
+                    r.encoding = chardet.detect(r.content)['encoding']
+                    if (not r.ok) or len(r.content) < 500:
+                        raise ConnectionError
+                    else:
+                        return r.text
+                except Exception:
+                    count += 1
 
+        return None

util/exception.py

@@ -4,7 +4,7 @@
 
 class Test_URL_Fail(Exception):
     def __str__(self):
-        str = "访问%s失败，请检查网络连接" % config.TEST_URL
+        str = "访问%s失败，请检查网络连接" % config.TEST_IP
         return str