Zhennan LI nanmu42

This is the gist version of my blog post Quick Dockerfile for Python Poetry Projects.

I hope you find it useful.

Flink has a deadlock case and can be caused by the combination of Flink's backpressure mechanism with iterations (more likely when there is heavy feedback load).

There is a proposal to resolve this issue, but it seems to be abondoned.

The walkaround, suggested by Gábor Hermann, is to throttle messages into the iteration.

Here is my implementation.

	FROM golang:buster as golang
	RUN apt-get update && \
	DEBIAN_FRONTEND=noninteractive apt-get install -y \
	ca-certificates \
	tzdata \
	build-essential \
	tar \
	bash
	WORKDIR /app
	COPY . .

	func firstNUTF8AtMost(s string, n int) string {
	i := 0
	for j := range s {
	if i >= n {
	return s[:j]
	}
	i++
	}
	return s
	}

	package main

	import (
	"flag"
	"fmt"
	"net"
	"net/http"
	)

	var (

	// source: https://stackoverflow.com/questions/41240761/check-if-ip-address-is-in-private-network-space
	var privateIPBlocks []*net.IPNet

	func init() {
	for _, cidr := range []string{
	"127.0.0.0/8", // IPv4 loopback
	"10.0.0.0/8", // RFC1918
	"172.16.0.0/12", // RFC1918
	"192.168.0.0/16", // RFC1918
	"169.254.0.0/16", // RFC3927 link-local

	const CompressionPlugin = require("compression-webpack-plugin");
	const fileToCompressRegex = /\.(js\|css\|htm\|html\|svg\|png\|txt\|json\|wasm)$/
	const productionMode = process.env.NODE_ENV === 'production'

	let plugins = []
	if (productionMode) {
	plugins.push(new CompressionPlugin({
	filename: '[path][base].br[query]',
	algorithm: 'brotliCompress',
	test: fileToCompressRegex,

	// source: https://www.reddit.com/r/golang/comments/5ia523/idiomatic_way_to_remove_duplicates_in_a_slice/db6qa2e/
	func SliceUniqMap(s []int) []int {
	seen := make(map[int]struct{}, len(s))
	j := 0
	for _, v := range s {
	if _, ok := seen[v]; ok {
	continue
	}
	seen[v] = struct{}{}
	s[j] = v

	# unique line
	awk '{!seen[$0]++};END{for(i in seen) if(seen[i]==1)print i}' file

	# second column of a csv, with white spaces and quotes stripped
	awk -F',' '{gsub(/[ "]/, "", $0);print $2}' some.csv > dest.txt

	function isTouchDevice() {
	return 'ontouchstart' in window
	}