NetServer | A C High Performance Net Library | TCP library
kandi X-RAY | NetServer Summary
kandi X-RAY | NetServer Summary
A C++ High Performance Net Library
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of NetServer
NetServer Key Features
NetServer Examples and Code Snippets
Community Discussions
Trending Discussions on NetServer
QUESTION
My goal is to modify a single setting in an INI file over the network on multiple PC's using an external list of PCs, and output the results to a log file.
- Needs to be a windows batch file. Network is locked out of running scripts such as PS.
- Security is not an issue, as read\write access is open at my level to all targeted PCs.
- The content of the INI file to be modified, is unique to the PC, so blanket overwrite/copy is not an option.
- The removal or addition of blank lines in the INI is not an issue.
- The file
PCList.txt, could contain 1-100 PC names or IP's, one per line. - Output to a log file with
PCNAME: 'Success' or 'Fail'
So far, I have found and modified a script that will edit a file locally, but have been unable to get it to work with a FOR/DO loop to process that action for each PC in the list - OR - add the logging output
...ANSWER
Answered 2021-Jan-16 at 12:36I suggest to use the following code:
QUESTION
I have tried to implement a TCP server socket with spring integration in an allready existing spring boot application, but I am facing a problem and this problem drives me crazy... The client is sending a message (a byte array) to the server and timesout. That's it. I am not receiving any exceptions from the server. It seems I have provided the wrong port or somthing but after checking the port, I am sure it is the right one.
This is my annotation based configuration class:
...ANSWER
Answered 2020-Oct-16 at 19:07How are you communicating with this server? By default the connection factory is configured to require the input to be terminated by CRLF (e.g. Telnet). You have to configure a different deserializer if your client uses something else to indicate a message end.
Also, your method signature is incorrect; it should be:
QUESTION
I would like to send commands to server via TCP. I created server which retrieve Buffers messages. In client I send 10 commands. I don't know why server reads Buffer in not predictable way.
server:
...ANSWER
Answered 2020-May-07 at 14:39This is not a bug. TCP is a low-level protocol, it does not define what is a request or command like HTTP does.
You must define your own application protocol on top of TCP, which can be as simple as adding the newline \n character between them, or having a fixed buffer size for all commands.
On the server side, you could then use the Vert.x RecordParser:
QUESTION
We have created an IntegrationFlow for an inbound TCP server. Whenever we test this the integration is fine until the client disconnects, then we get a continuous flow of empty messages.
Spring Integration 5.2.5.RELEASE
Flow:
...ANSWER
Answered 2020-May-05 at 15:55There is nothing in the log about the client disconnecting. We would see socket close activity in the log.
The log implies we are receiving packets containing 0x00000000.
Use wireshark or similar to look at the activity on the wire.
EDIT
Your custom deserializer is causing the problem.
QUESTION
I have a Vert.x NetServer, and accept one connection from client side, suppose I pause socket ReadStream, then I won't receive any buffer from connection, at the same time, suppose client side keep on sending message, I am wondering whether it is possible to back-pressure client side to get halt rather than continue to send? If it is impossible, where those incoming data store? and could I check how much data was already come in but not be read?
Any helps are appreciated.
...ANSWER
Answered 2020-Apr-26 at 10:34It seems all your questions are already addressed by the official documentation:
https://vertx.io/docs/vertx-core/java/#streams
Incoming messages are stored in the write queue. If write queue is full, you can ask client to pause with pause() method, and to resume with resume() method.
Alternatively, and this is also covered in documentation, you can use Pipe to handle this for you.
QUESTION
I'm trying to create a TCP/IP simulator that mimics a production server that I'm not able to test against. The server receives and sends byte arrays - not strings.
In using Spring Integration, I'm able to have a conversation that works fine when not using the ByteArrayRawSerializer, but when I implement the ByteArrayRawSerializer, I'm not able to receive messages back to the client even though they're being processed on the server.
The Transformers.objectToString() method seems to be suspect, but at this point I believe I've tried most everything. Please advise...
The important client code is as follows:
...ANSWER
Answered 2019-Dec-04 at 04:07TCP is a stream - you need something to tell the receiver what constitutes a "message" within that stream. The raw deserializer uses the socket closing to delimit the message.
You can't use a raw deserializer on the server side with a gateway because the client closing the socket means we can't send the reply.
You can use a raw serializer on the server side for the reply, as long as the singleUseConnections property is set so the gateway will close the connection when the reply is sent, so the client side will get the EOF.
Since you control both the client and server side, why do you want to use the raw (de)serializer?
QUESTION
I upgrade my Spring boot version from 2.0.5.RELEASE to 2.1.8.RELEASE (so Spring Integration from 5.0 to 5.1) and the automatic type casting inside integration flow doesn't work anymore. I am used to define a set of @IntegrationConverter components and automatic casting with the operation transform(Type.class, p -> p) inside integration flow code but with the new version it seems to be broken.
ANSWER
Answered 2019-Sep-12 at 17:04This is a bug in Spring Integration.
We just don't use a proper ConversionService in the GenericMessageConverter.
Please, raise a GH issue on the matter.
Meanwhile a workaround for you is like this:
QUESTION
When I have the following simple IntegrationFlow written with Spring Boot and Spring Integration:
...ANSWER
Answered 2019-Aug-05 at 20:52The MockIntegrationContext doesn't currently support replacing inbound endpoints that are not polled MessageSource because, yes, we can simply send to the first channel.
You don't need to add a channel to do that, simply get the input channel from the flow...
QUESTION
This is variant of my question How to implement simple echo socket service in Spring Integration DSL. A good working solutions was introduced but I would like to explore alternatives. Particularly I am interested in solution based on using inbound and outbound channels explicitly, in client and server implementations. Is that possible?
So far I was able to come up with:
HeartbeatClientConfig
...ANSWER
Answered 2019-Mar-25 at 13:48You can't start the server-side flow with a channel.
The flow starts with the gateway; it handles all the socket communication. When is receives a message it sends it to a channel.
You could do this...
QUESTION
So, here I've got some complex client-server application and some part of it opens port for listening and further network interactions. QTcpServer + QTcpSocket are used (the details will be described below).
This "network layer" of the application worked fine everywhere, except Windows 8.1 Pro. Just don't ask, why our client deсided, that it could be used as a server... It occured, that incorrect restarting of the process, which opened TCP connection on a specific port for listening causes sometimes this port to be unsuitable for any following attempts to bind it. It looks like some sort of magic, but the behavior occured as follows:
- Port 8554 was listened ("conection -- established") by a process
- Process crashes or killed somehow while having clients connected via this socket
- Process restarts and attempts to listen on the port again. It fails with "already in use".
- I stop the server and try to check the port via
netstat -an. It's free. I wait for some time and try to check the port via powershell, like:
...
ANSWER
Answered 2019-Jan-23 at 16:19Took me a while to consider all the possible solutions, though there were not many of them at all.
- Here I found something looking much like my problem. Made an adaptation of the code, provided there... Okay, just took most of it from that answer =)
- @G.M.'s comment pushed me to the idea that socket api in this case should differ only in headers
Manuals told me that SO_LINGER flag is often a result of bad architecture (client should close the connection in most cases, not server), after several experiments it occured this flag wasn't of much use in my case.
Binding to the exact IP lead to several complexities, more of a crutch than a solution IMHO.
So, after minor adaptations the socket listening class became something like that:
QTcpServer2.h
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install NetServer
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
