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web-boardimage | An HTTP service that renders chess board images | Web Framework library

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kandi X-RAY | web-boardimage Summary

web-boardimage is a Python library typically used in Server, Web Framework applications. web-boardimage has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. However web-boardimage build file is not available. You can download it from GitHub.
An HTTP service that renders chess board images.

kandi-support Support

  • web-boardimage has a low active ecosystem.
  • It has 48 star(s) with 13 fork(s). There are 7 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 0 open issues and 3 have been closed. On average issues are closed in 688 days. There are no pull requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of web-boardimage is current.

quality kandi Quality

  • web-boardimage has 0 bugs and 0 code smells.

securitySecurity

  • web-boardimage has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • web-boardimage code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.

license License

  • web-boardimage is licensed under the AGPL-3.0 License. This license is Strong Copyleft.
  • Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

buildReuse

  • web-boardimage releases are not available. You will need to build from source code and install.
  • web-boardimage has no build file. You will be need to create the build yourself to build the component from source.
  • Installation instructions, examples and code snippets are available.
  • web-boardimage saves you 28 person hours of effort in developing the same functionality from scratch.
  • It has 77 lines of code, 4 functions and 1 files.
  • It has medium code complexity. Code complexity directly impacts maintainability of the code.
Top functions reviewed by kandi - BETA

kandi has reviewed web-boardimage and discovered the below as its top functions. This is intended to give you an instant insight into web-boardimage implemented functionality, and help decide if they suit your requirements.

  • Render a SVG image .
  • Render a PNG image .
  • Load a theme file
  • Render SVG .

web-boardimage Key Features

An HTTP service that renders chess board images

web-boardimage Examples and Code Snippets

  • Installation
  • Usage
  • HTTP API

Installation

sudo apt-get install python3-dev libffi-dev libxml2-dev libxslt1-dev libcairo2
pipenv install

Community Discussions

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Trending Discussions on Web Framework

QUESTION

Why can two Java processes bind to the same socket in macOS?

Asked 2022-Feb-16 at 20:18

I have some Java code that is generating a socket binding. It's hard to provide a minimal example as this is part of a web framework, but it effectively does this check at some point.

  private static boolean portInUse(int port) {
    // try to bind to this port, if it succeeds the port is not in use
    try (ServerSocket socket = new ServerSocket(port)) {
      socket.setReuseAddress(true);
      return false;
    } catch (IOException e) {
      return true;
    }
  }

I can see that if I run two distinct Java processes with the same port, they both fall into the first conditional and return false, thus both are able to bind to the same port. I've read through some related socket questions and explanations like this one, but they seem to make it sound like this shouldn't be possible with the options I've specified. Looking at the implementation of setReuseAddress it only seems to set SO_REUSEADDR on the socket.

I can see one process ends up with a socket like ServerSocket[addr=0.0.0.0/0.0.0.0,localport=56674] in a debugger. If I run something like sudo lsof -n -i | grep -e LISTEN -e ESTABLISHED | grep 56674 I can see two processes binding to the same port:

java      68863    natdempk 1256u  IPv4 0xbbac93fff9a6e677      0t0  TCP *:56674 (LISTEN)
java      68998    natdempk  985u  IPv6 0xbbac93fff2f84daf      0t0  TCP *:56674 (LISTEN)

I can also see some other projects like gRPC and Node mention this behavior as being observed with their servers in issue trackers, but they never explain why this is possible. How can distinct processes bind to the same socket on macOS?

I am running macOS 11.6.3 (20G415) if that is at all helpful. Happy to provide more debug info as well if anyone has anything I should add here.

ANSWER

Answered 2022-Feb-16 at 20:18

They are not binding to the same port. One is binding to TCP on top of IPv6, the other is binding to TCP on top of IPv4.

To expand on the Java details a bit: new ServerSocket(port) in Java uses InetAddress.anyLocalAddress() because no InetAddress was passed in. InetAddress.anyLocalAddress() can return either an IPv4 or IPv6 address, which means this isn't guaranteed to be the same value to bind to across JVMs despite the same port being passed in.

Source https://stackoverflow.com/questions/71148158

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install web-boardimage

You can download it from GitHub.
You can use web-boardimage like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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