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タグとソースコードの修正(PythonのコードC#のエラー処理部分、C#のリクエスト用のstrに開業を追加)

2021/12/08 02:21

投稿

syoshinsya-

スコア21

test CHANGED Viewed

File without changes

test CHANGED Viewed

@@ -14,6 +14,248 @@
 port = 1900
+messages = "M-SEARCH * HTTP/1.1\r\n" +\
+           "HOST: 239.255.255.250:1900\r\n" +\
+           "MX: 5\r\n" +\
+           "MAN: \"ssdp:discover\"\r\n" +\
+           "ST: upnp:rootdevice\r\n\r\n\r\n"
+sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+sock.sendto(messages.encode(), (host, port))
+while True:
+    try:
+        res = sock.recv(4096)
+        print(res.decode())
+    except socket.timeout:
+        break
+sock.close()
+```
+# 問題のC#のコード
+```C#
+Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
+            try
+            {
+                IPEndPoint endPoint = new IPEndPoint(IPAddress.Parse("239.255.255.250"), 1900);
+                client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 5000);
+                string str =
+                "M-SEARCH * HTTP/1.1\r\n" +
+                "HOST: 239.255.255.250:1900\r\n" +
+                "MX: 5\r\n" +
+                "MAN: \"ssdp:discover\"\r\n" +
+                "ST: upnp:rootdevice\r\n";
+                byte[] q = Encoding.UTF8.GetBytes(str);
+                client.SendTo(q, q.Length, SocketFlags.None, endPoint);
+                IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
+                EndPoint senderEP = sender;
+                List<string> strList = new List<string>();
+                while (true)
+                {
+                    try
+                    {
+                        byte[] data = new byte[1024];
+                        client.ReceiveFrom(data, ref senderEP);
+                        Console.WriteLine(Encoding.UTF8.GetString(data));
+                    }
+                    catch(Exception)
+                    {
+                        break;
+                    }
+                }
+            }
+            catch(Exception e)
+            {
+                Console.WriteLine(e.Message);
+            }
+            finally
+            {
+                if (client != null)
+                    client.Close();
+            }
+```
+#うまくいっていない部分の説明
+こちらがPythonの実行結果です。デバイスが4つ見つかっています。
+```Python
+HTTP/1.1 200 OK
+CACHE-CONTROL: max-age=120
+Location: http://192.168.0.1:2869/upnp/rootdevice.xml
+SERVER: IGD-HTTP/1.1 UPnP/1.0 UPnP-Device-Host/1.0
+ST: upnp:rootdevice
+EXT:
+HTTP/1.1 200 OK
+Location: http://192.168.0.9:49154/MediaRenderer/desc.xml
+Cache-Control: max-age=1800
+Content-Length: 0
+Server: Linux/3.2 UPnP/1.0 Network_Module/1.0 (RX-V485)
+EXT:
+ST: upnp:rootdevice
+HTTP/1.1 200 OK
+CACHE-CONTROL: max-age=1800
+DATE: Tue, 07 Dec 2021 14:30:18 GMT
+EXT:
+LOCATION: http://192.168.0.4:60606/***/Server0/ddd
+SERVER: Linux/4.0 UPnP/1.0 Panasonic-UPnP-MW/1.0
+ST: upnp:rootdevice
+HTTP/1.1 200 OK
+CACHE-CONTROL: max-age=1800
+DATE: Tue, 07 Dec 2021 14:30:00 GMT
+EXT:
+LOCATION: http://192.168.0.2:38400/***/description.xml
+SERVER: NetBSD/1.6.1, UPnP/1.0, Portable SDK for UPnP devices/1.6.6, DLNADOC/1.50
+ST: upnp:rootdevice
+```
+こちらはC#の実行結果です。デバイスが2つしか見つけられていません...なぜ...
+```C#
+HTTP/1.1 200 OK
+CACHE-CONTROL: max-age=120
+Location: http://192.168.0.1:2869/upnp/rootdevice.xml
+SERVER: IGD-HTTP/1.1 UPnP/1.0 UPnP-Device-Host/1.0
+ST: upnp:rootdevice
+EXT:
+HTTP/1.1 200 OK
+Location: http://192.168.0.9:49154/MediaRenderer/desc.xml
+Cache-Control: max-age=1800
+Content-Length: 0
+Server: Linux/3.2 UPnP/1.0 Network_Module/1.0 (RX-V485)
+EXT:
+ST: upnp:rootdevice
+```
+#修正履歴
+##2021/12/08
+修正前
+```Python
 messages = "M-SEARCH * HTTP/1.1\r\n" +
            "HOST: 239.255.255.250:1900\r\n" +
@@ -24,47 +266,11 @@
            "ST: upnp:rootdevice\r\n";
-sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-sock.sendto(message.encode(), (host, port))
-while True:
-    try:
-        res = sock.recv(4096)
-        print(res.decode())
-    except socket.timeout:
-        break
-sock.close()
-```
+```
-# 問題のC#のコード
 ```C#
-Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
-            try
-            {
-                IPEndPoint endPoint = new IPEndPoint(IPAddress.Parse("239.255.255.250"), 1900);
-                client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 5000);
-                string str =
+string str =
                 "M-SEARCH * HTTP/1.1\r\n" +
@@ -76,21 +282,9 @@
                 "ST: upnp:rootdevice\r\n";
-                byte[] q = Encoding.UTF8.GetBytes(str);
-                client.SendTo(q, q.Length, SocketFlags.None, endPoint);
-                IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
-                EndPoint senderEP = sender;
-                List<string> strList = new List<string>();
-                while (true)
+while (true)
                 {
@@ -116,132 +310,70 @@
                 }
-            }
-            catch(Exception e)
-            {
-                Console.WriteLine(e.Message);
-            }
-            finally
-            {
-                if (client != null)
-                    client.Close();
-            }
-```
+```
-#うまくいっていない部分の説明
+修正後
-こちらがPythonの実行結果です。デバイスが4つ見つかっています。
 ```Python
-HTTP/1.1 200 OK
-CACHE-CONTROL: max-age=120
-Location: http://192.168.0.1:2869/upnp/rootdevice.xml
-SERVER: IGD-HTTP/1.1 UPnP/1.0 UPnP-Device-Host/1.0
+messages = "M-SEARCH * HTTP/1.1\r\n" +\
+           "HOST: 239.255.255.250:1900\r\n" +\
+           "MX: 5\r\n" +\
+           "MAN: \"ssdp:discover\"\r\n" +\
-ST: upnp:rootdevice
+           "ST: upnp:rootdevice\r\n\r\n\r\n"
-EXT:
-HTTP/1.1 200 OK
-Location: http://192.168.0.9:49154/MediaRenderer/desc.xml
-Cache-Control: max-age=1800
-Content-Length: 0
-Server: Linux/3.2 UPnP/1.0 Network_Module/1.0 (RX-V485)
-EXT:
-ST: upnp:rootdevice
-HTTP/1.1 200 OK
-CACHE-CONTROL: max-age=1800
-DATE: Tue, 07 Dec 2021 14:30:18 GMT
-EXT:
-LOCATION: http://192.168.0.4:60606/***/Server0/ddd
-SERVER: Linux/4.0 UPnP/1.0 Panasonic-UPnP-MW/1.0
-ST: upnp:rootdevice
-HTTP/1.1 200 OK
-CACHE-CONTROL: max-age=1800
-DATE: Tue, 07 Dec 2021 14:30:00 GMT
-EXT:
-LOCATION: http://192.168.0.2:38400/***/description.xml
-SERVER: NetBSD/1.6.1, UPnP/1.0, Portable SDK for UPnP devices/1.6.6, DLNADOC/1.50
-ST: upnp:rootdevice
-```
+```
-こちらはC#の実行結果です。デバイスが2つしか見つけられていません...なぜ...
 ```C#
-HTTP/1.1 200 OK
+string str =
-CACHE-CONTROL: max-age=120
-Location: http://192.168.0.1:2869/upnp/rootdevice.xml
-SERVER: IGD-HTTP/1.1 UPnP/1.0 UPnP-Device-Host/1.0
+                "M-SEARCH * HTTP/1.1\r\n" +
+                "HOST: 239.255.255.250:1900\r\n" +
+                "MX: 5\r\n" +
+                "MAN: \"ssdp:discover\"\r\n" +
-ST: upnp:rootdevice
+                "ST: upnp:rootdevice\r\n\r\n\r\n";
+while (true)
+                {
-EXT:
+                    try
-HTTP/1.1 200 OK
+                    {
-Location: http://192.168.0.9:49154/MediaRenderer/desc.xml
-Cache-Control: max-age=1800
+                        byte[] data = new byte[1024];
+                        client.ReceiveFrom(data, ref senderEP);
+                        strList.Add(Encoding.UTF8.GetString(data));
+                        Console.WriteLine(Encoding.UTF8.GetString(data));
+                    }
-Content-Length: 0
+                    catch(SocketException)
-Server: Linux/3.2 UPnP/1.0 Network_Module/1.0 (RX-V485)
+                    {
-EXT:
+                        break;
-ST: upnp:rootdevice
+                    }
+                }
-```
+```