tcp

Separate TcpStream + SslStream into read and write components

由 自古美人都是妖i 提交于 2020-05-12 08:29:06
问题 I'm trying to make client program that communicates with a server using a TcpStream wrapped by a openssl::ssl::SslStream (from crates.io). It should wait for read , and process data sent from the server if it was received without delay . At the same time, it should be able to send messages to the server regardless of reading. I tried some methods such as Passing single stream to both read and write threads. Both read and write methods require a mutable reference, so I couldn't pass a single

Send Data from [Python Client] to [C# Server] using Socket

由 ☆樱花仙子☆ 提交于 2020-05-11 09:29:47
问题 I want to send byte data from Python-Client to C# Server using a simple Socket Application. The C# Server is working fine with a C# Client ! But when I try to use Python Socket to send data to the C#-Server, the data never arrives. I'm not very used to Python, can someone check my Code and give me a hint how to receive the data in my c# Server? Did I make a mistake in code? Is this maybe the wrong way to send byte data from Python to C#? Is there a better solution? Python Client: import

Send Data from [Python Client] to [C# Server] using Socket

由 浪子不回头ぞ 提交于 2020-05-11 09:29:12
问题 I want to send byte data from Python-Client to C# Server using a simple Socket Application. The C# Server is working fine with a C# Client ! But when I try to use Python Socket to send data to the C#-Server, the data never arrives. I'm not very used to Python, can someone check my Code and give me a hint how to receive the data in my c# Server? Did I make a mistake in code? Is this maybe the wrong way to send byte data from Python to C#? Is there a better solution? Python Client: import

lsof print numeric ports

由 |▌冷眼眸甩不掉的悲伤 提交于 2020-05-09 20:01:08
问题 How do you get lsof to produce numeric port information instead of attempting to resolve the port to service name? For example, I want TCP *:http (LISTEN) to give me TCP *:80 (LISTEN) in-fact if at all possible I never want to see another service name in lsof print-out ever again. So if there is a way to make numeric ports the default I would like to understand how to do that as well. 回答1: Run lsof -P . According to man lsof, -P inhibits the conversion of port numbers to port names for

xp下用虚拟串口与linux的minicom通信

由 送分小仙女□ 提交于 2020-05-03 22:10:37
目的 linux下的串口通信程序，笔记本没有串口，台式机居然也没有，没有USB转串，调试个P啊，肿么办？虚拟个串口先~ 交代下环境 windowsXP SP3 vmware 7.1.4 Red Hat 4.1.2-48 （cat /proc/version） VSPM 2.82 TCP & UDP 测试工具 1.02 GO... 1、关闭虚拟机，设置虚拟串口 会出现一堆虚拟串口，看着太乱，删掉仨先~ 只留COM3 2、打开TCP & UDP测试工具，建立与6020的连接 可以看到vspm上已经显示和测试工具建立了连接： 3、为vmware的linux增加串口设备 linux关闭状态（非suspend）下，VM→Settings→Add 截图中next没有激活，不过只要你的linux是poweroff状态，这里应该是激活的，选择COM3。 如果已经有了串口设备，请修改为COM3。 4、设置minicom 设置串口参数： 由于我们使用minicom作为超级终端, 而不是控制modem, 所以需要修改Modem and dialing, 将Init string, Reset string, Hang-up string设置为空. 设置为缺省值，切记！ 退出。 5、自己嗨吧~ 发送数据 接收数据 end~ 来源： oschina 链接： https://my.oschina.net/u

Number of HTTP requests per TCP connection

由 折月煮酒 提交于 2020-05-02 06:19:30
问题 Is there a limit to the number of HTTP requests a client can makes to the server per TCP connection? I wrote a python script that is supposed to open a TCP connection and send 10 similar HTTP post requests. The first 5 requests are sent immediately, however the last 5 take a really long time (these are very beefy requests that take the server more than 1 min to respond) This leads me to believe that 5 requests in the max per TCP connection and the clients is waiting for the server to respond

Number of HTTP requests per TCP connection

由 拟墨画扇 提交于 2020-05-02 06:19:11
问题 Is there a limit to the number of HTTP requests a client can makes to the server per TCP connection? I wrote a python script that is supposed to open a TCP connection and send 10 similar HTTP post requests. The first 5 requests are sent immediately, however the last 5 take a really long time (these are very beefy requests that take the server more than 1 min to respond) This leads me to believe that 5 requests in the max per TCP connection and the clients is waiting for the server to respond

TIME_WAIT with boost asio

由 怎甘沉沦 提交于 2020-04-18 04:08:37
问题 I tried the official tcp echo server example server and client. With netstat -ano | findstr TIME_WAIT I can see the client causes a TIME_WAIT every time, while the server disconnects cleanly. Is there anyway to prevent the TIME_WAIT or CLOSE_WAIT, that disconnect cleanly for both sides? Here's the captured packets, seems the last ACK is sent correctly, but still there is TIME_WAIT on client side. 回答1: CLOSE_WAIT is a programming error. The local application has received an incoming close but

How does AMQP overcome the difficulties of using TCP directly?

由 南笙酒味 提交于 2020-04-13 08:02:49
问题 How does AMQP overcome the difficulties of using TCP directly when sending messages? Or more specifically in a pub/sub scenario? 回答1: In AMQP there is a broker, that broker receives the messages and then does the hard part about routing them to exchanges and queues. You can also setup durable queues which save the messages for clients even when they are disconnected. You could certainly do all this yourself, but it's a tremendous amount of work to do correctly. RabbitMQ in particular has been

How does AMQP overcome the difficulties of using TCP directly?

由 允我心安 提交于 2020-04-13 08:02:09
问题 How does AMQP overcome the difficulties of using TCP directly when sending messages? Or more specifically in a pub/sub scenario? 回答1: In AMQP there is a broker, that broker receives the messages and then does the hard part about routing them to exchanges and queues. You can also setup durable queues which save the messages for clients even when they are disconnected. You could certainly do all this yourself, but it's a tremendous amount of work to do correctly. RabbitMQ in particular has been
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