<p>Hello guys, I am working on implementing a router on top of net/http, there is nothing fancy about it, and it's my first time to write a router "or a useful package ever [imposter syndrome detected :D]". I hope you guys can give me a feeback on my golang skils and how to improve this little project, I already have w...阅读全文
<p>Go is my favorite language by far. I'm building a project to learn new things , it's a graphql proxy, and i'm in doubt if Go is the best choice or not.</p> <p>The proxy gonna receive a unknow graphql query and do some processing behind the scenes with the response from origin. The problem is that the qu...阅读全文
<p>Does anyone have any really good example(s) of Go project(s) in github?</p> <p>I'd like to see a small to medium sized code base, with sterling packages and file layout. Bonus points for a Makefile or some other build tool input.</p> <hr/>**评论：**<br/><br/>onyno: <pre><p><a href=&#...阅读全文
<p>Just announced at re:Invent, Go becomes a first class citizen on Lambda.</p> <hr/>**评论：**<br/><br/>emostafa: <pre><p>Do you guys find it weird that Google Cloud Functions doesn't support Go ? only nodejs at the moment.</p></pre>chuyskywalker: <pre><p>GCF is really behind o...阅读全文
<p>I have been developing applications in Go for a year now, and I really want to thank Google and the community to make such a great language and countless useful modules. I have learned so much and I would like to share what I have learned so far.</p> <p><a href="https://medium.com/@houyubing24/how-can-go-make-you-a-mast...阅读全文
<p>I've not yet come across some recommendations for how granular you should get with distributed tracing. I know this isn't strictly a Go question, but I am working with Jaeger via OpenTracing in Go.</p> <p>I'm working on some services that use <a href="https://blog.golang.org/pipelines" rel=&#...阅读全文
<p>I'm writing <a href="https://leanpub.com/12fa-docker-golang">12 Factor Applications with Docker & Go</a> and I'm currently working on code samples for Go-related chapters. I already covered <a href="https://github.com/namsral/flag">namsral/flag</a>, added a footnote about <...阅读全文
<p>I have some downtime at work and I can spend my time learning what I want. Go has been on the list for a while and I'd really like to learn it and possibly use it in real projects.</p> <p>Now, I could make a web backend with an MVC architecture, make some endpoints etc... But that's kinda boring as it would jus...阅读全文
<p>I have a static fileserver written in Go which is serving html, css, js files for a single page application, which is only querying data from an API also written in Go. So far I happy with the performance and I'm planning to not use Nginx at all, instead using HAProxy or other tool for load balancing.</p> <p>What I mis...阅读全文
<p>Hi guys,</p> <p>I need to hook up a Raspberry PI to AD / DA converters and I would like to use GO to talk to these converters.</p> <p>I have accured this board:</p> <p><a href="http://www.waveshare.com/high-precision-ad-da-board.htm" rel="nofollow">http://www.waveshare.com/high-p...阅读全文
<p>I'm a 15 year old that's currently learning Go. I love it. Seriously, so much better than Node and Java for me. The thing is, when I look for jobs (well really I'd be looking for an internship), I have like 5 results for Go, and hundreds for Java, JavaScript, etc. My question is this: is Go a language that you can m...阅读全文
<p>I have about 50 scheduled tasks that I need to run with goroutine every 10 minutes. In Python's django/flask we can use Celery for monitoring and error handling, and RabbitMQ for message queueing. I am not sure where to start right now, do I even need a message/task queueing in GO? I am also considering using Amazon's SQS t...阅读全文
<p>I have been using go for quite awhile, and haven't really given much thought to the way that the usage of nil is used versus other languages I have used (Java/C#/Node). I have always kind of accepted it for what it was.</p> <p>However, as golang makes more of an appearance in our stack, I find myself questioning why th...阅读全文
<p>I have a solid C background and i'm enjoying a lot Go and its composition. I never felt the need for generics, and sometimes (totally IMHO) i think that they are limited to such few cases that i can call "lazy programmers". Can you tell me how big this deal is?</p> <hr/>**评论：**<br/><br/>jonca...阅读全文
<h1>1) n Goroutines <em>or</em> JobQueue</h1> <p>I have 1000 jobs that can be parallelized (http requests). Should I use 1000 Goroutines, or 10 Goroutines and a JobQueue? I'm assuming the first one would be extremely expensive or am I wrong?</p> <h1>2) reuse 1 <code>http.Client</code> ...阅读全文
K8s中的命令执行由apiserver、kubelet、cri、docker等组件共同完成, 其中最复杂的就是协议切换以及各种流拷贝相关,让我们一起来看下关键实现,虽然代码比较多，但是不会开发应该也能看懂，祝你好运 1. 基础概念 K8s中的命令执行中有很多协议相关的处理, 我们先一起看下这些协议处理相关的基础概念 1.1 Http协议中的Connection与Upgrade HTTP/1.1中允许在同一个链接上通过Header头中的Connection配合Upgrade来实现协议的转换，简单来说就是允许在通过HTTP建立的链接之上使用其他的协议来进行通信，这也是k8s中命令中实现协议升级的关键 1.2 Http协议中的101状态码 在HTTP协议中除了我们常见的HTTP1.1,还支持web...阅读全文
<p>I'm trying to hash only a small part of a large file. My approach is "if the file is < 1M bytes, SHA256 the entire thing; otherwise, SHA256 the first 100K bytes, then 500K bytes starting at len(file)/2."</p> <p>I wrote it in Ruby, which is hopefully readable even if you don't know Ruby:&l...阅读全文
<p>I created a library for Right/Left string padding which has variable allocation <code>caching</code> for common use cases: <a href="https://github.com/Rhymond/gopad/blob/master/gopad.go#L8" rel="nofollow">https://github.com/Rhymond/gopad/blob/master/gopad.go#L8</a></p> <p>Is it good prac...阅读全文
image 学习一门语言，很多人都会是从搭建环境开始。有的语言的环境比较复杂，而有的语言环境很简单。对于go而言，说简单，的确不难，但有些概念需要先对其有所理解，才知道为什么这么用。网上对于怎么搭建一个golang开发环境已有了很多的教程，在这里我会简单介绍，不做过多描述。本篇文章仅对一些概念进行介绍，以及分享对一些我本人搭建开发环境的心得与技巧，如有错误，欢迎指正和交流。 搭建golang环境 1.到golang下载地址下载对应环境的安装包或者源码，若是Linux环境的话，将源码包下载解压之后，放至/usr/local/（实际上放至合适位置即可，只要把它添加进PATH就行），如： export PATH=$PATH:/usr/local/go/bin 2.配置GOPATH、GOROOT，这...阅读全文
前言 这周很值得纪念，首先是 goproxy.cn 已缓存的模块版本总数突破了一百万，这甚至比起 Go 官方的 proxy.golang.org 已缓存的还要多出不少。其次是 goproxy.cn 的日访问量已稳定在千万级，正在朝着亿级进发，目前这在国内我了解到的别的几个同类服务中是最多的了。另外尤为重要的一点是，经过我们的不懈努力，甚至付出了两次事故的代价（详见：status.goproxy.cn），我们终于使得 goproxy.cn 达到了零错误率！现在的 goproxy.cn 可以说是很稳的了，大家可以放心使用。 刚刚在开头稍微为这一个月发生的事情做了个小总结。接下来说一下本次的重点，也就是 goproxy.cn 推出了 Go 模块代理世界中的首个统计数据 API（文档详见：gopro...阅读全文
linux安装Go语言开发包 默认读者会使用linux的基本操作 配置go语言的开发环境的第一步是要在go官网下载页面下载开发包 linux需要下载tar.gz压缩文件 image 这里我们下载的是 64 位的开发包，如果读者的电脑是 32 位系统或者有特殊的需求，则需要下载 32 位的开发包 在上图所示页面中向下滚动即可找到 32 位开发包的下载地址，如下图所示 image 注意，如果在ubuntu这样有图形化界面的linux操作系统，我们可以直接下载 没有图形化界面时，我们需要在命令行中操作 第一步：下载开发包 >> wget https://dl.google.com/go/go1.13.7.linux-amd64.tar.gz --2020-02-06 14:18:58-- http...阅读全文
切片定义 切片（Slice）是一个拥有相同类型元素的可变长度的序列。它是基于数组类型做的一层封装。它非常灵活，支持自动扩容。切片是一个引用类型，它的内部结构包含地址、长度和容量。切片一般用于快速地操作一块数据集合。 数组与切片 切片的数据实际是通过数组来保存的，每个切片都有三个信息：底层数组的指针、切片的长度（len）和切片的容量（cap）。 举个栗子，底层数组a := [8]int{0, 1, 2, 3, 4, 5, 6, 7}； 切片s1 := a[:5]，切片和数组对应关系： Go-slice-2020-05-12-15-23-13 切片s2 := a[3:6]，切片和数组对应关系： Go-slice-2020-05-12-15-44-43 指向同一个底层数组的切片修改值 切片是指向底...阅读全文
<p>"Most idiomatic" is subjective--and that's fine. What do you think is the most idiomatic golang server example on the internet? I'm wanting to follow idiomatic patterns for the cli (spf13/cobra ?), for logging (logrus ?), for routing (net/http ?), middleware (std lib ?), for dockerizing (from scratch ?) etc....阅读全文
<p>I've decided to use Advent of Code to keep learning Go this year; is anyone else participating? Would love to check out your repos if so; here's mine: <a href="https://gitlab.com/drakonka/advent-of-code-2017">https://gitlab.com/drakonka/advent-of-code-2017</a></p> <p>For those who aren&#...阅读全文
<p>Is there a good way to time how long it takes for each upstream server that my http server is connecting to, without sprinkling <code>time.Now</code> and <code>time.Since</code> everywhere?</p> <hr/>**评论：**<br/><br/>film42: <pre><p>Is your main concern performance? You're ...阅读全文
<p>If you don't use TLS you don't even need the certs. Nothing will be small or have less attack surface.</p> <p>---- Dockerfile ----</p> <pre><code># Multi-stage builds make it easier to borrow automations and # artifacts from other images. The example below uses the alpine # package manager t...阅读全文
<p>Hi everyone!<br/> noob question here as I'm taking the Go tour on the website. My main languages are Python and Java (although I know a bit of Rust).<br/> Now, I understand how to use pointers, but as I was going through the pointers section of the tour I was wondering:<br/> if we can initialize structs this way ...阅读全文
<p>Good evening,</p> <p>I'm starting to learn go and wrote a small forum api together with a friend: <a href="https://github.com/dhenkes/forum" rel="nofollow">https://github.com/dhenkes/forum</a></p> <p>It does not have authentication or validation yet and basically just executes s...阅读全文
<p>Is there a more elegant way to do this (i.e. without a loop)?</p> <pre><code>type Symbol string type Production []Symbol func (p Production) String() string { strs := make([]string, len(p)) for i, symbol := range p { strs[i] = string(symbol) } return strings.Join(strs, " ") } </code><...阅读全文
<p>Hi,</p> <p>Just looking around the sub there's a surprising amount of posts with a score of 0.</p> <p>If you guys keep downvoting everything that moves, people are going to get discouraged and not bother posting anymore.</p> <p>If you don't like it - just don't upvote! 1 is SO ...阅读全文
<hr/>**评论：**<br/><br/>Kraigius: <pre><p>Can you elaborate? What are you trying to do? What did you tried?</p> <p><em>edit</em>: Ahhh... cmd/present, and me who was thinking you wanted help to let your tools handle https traffic. :P</p></pre>ZetaHunter: <pre><p>I am guessi...阅读全文
<p>We probably need a community supported mirror for packages.</p> <p>Simplest way that I can think of goes something like this.</p> <p>in Gopkg.toml, add source as the community maintained mirror, like so</p> <p>```</p> <p>[[constraint]]</p> <p>name = "github.com/user/p...阅读全文
今天我们继续接着前几篇关于Go Web编程的文章往下延伸。在Web应用程序中几乎每个应用场景都需要存储和检索数据库中的数据。当你处理动态内容，为用户提供表单以输入数据或存储登录名和密码凭据以供用户进行身份验证时，都需要用到数据库。 MySQL数据库是整个互联网中最常用的数据库。MySQL已经存在了很长时间，还在不停的进化并且随着互联网一起发展已多次证明了其位置和稳定性。 本文我们将探究Go中数据库访问的基础知识，在开始之前我们先更新一下我们使用的开发环境，之前在文章用Docker快速搭建Go开发环境 中我们只应用了一个运行 go的容器，现在我们为开发环境加上数据库。 关注文末公众号，回复gohttp04 获取容器编排文件和文章中用到的源代码。 在开发环境中增加MySQL容器 打开我们之前编写...阅读全文
Golang: 思路：这题给跪了。。。 代码如下： func superEggDrop(K int, N int) int { if K==1{ return N } mat:=make([][]int,K+1) for k,_:=range mat{ mat[k]=make([]int,N+1) } for k,_:=range mat[1]{ mat[1][k]=k } for i:=2;i<=K;i++{ for j:=1;j<=N;j++{ low,high:=1,j for low+1
<p>Hi ! I'm now making a web project. It uses standard Go library, julienschmidt/httprouter, gorilla/schema, go-sql-driver/mysql and pkg/errors. It creates simple templated server-rendered pages and currently all interaction with the server is performed with ordinary HTTP requests and forms though some AJAX is on the way. I use one mo...阅读全文
<p>I have a composite service aggregating data from other microservices, I was wondering how go would handle thousands of aggregations.</p> <hr/>**评论：**<br/><br/>xy8_t_rel_: <pre><p>define composite service.</p></pre>lolomfgkthxbai: <pre><p>Is that the buzzword of the year? Composite...阅读全文
<hr/>**评论：**<br/><br/>TheBoredBanker: <pre><p>I might be late to the party, but if you mildly hurt yourself like a stubbed toe, or a paper cut, pinch yourself elsewhere and focus on that feeling. Your body assumes it's more painful and stops feeling the pain from the other spot as much. It helps lessen the leng...阅读全文
<p>For reference, my current project is here: <a href="https://github.com/Jake-Ruston/a-level-cw/tree/master/src" rel="nofollow">https://github.com/Jake-Ruston/a-level-cw/tree/master/src</a></p> <p>So in <code>model/User.go</code> I have my <code>Register</code> function, which ...阅读全文
<p>I am trying to pitch Go for use in U.S. federal systems. Is there anyone who can provide me with some success stories about where Go was approved for use. Accompanying testimonials are awesome, but even just examples of use would be great. I don't need details, just high level stuff like department/agency, maybe project title. Als...阅读全文
<p>Hello everyone,</p> <p>Earlier today <a href="https://www.washingtonpost.com/politics/trump-to-announce-us-will-exit-paris-climate-deal/2017/06/01/fbcb0196-46da-11e7-bcde-624ad94170ab_story.html?">President Trump announced his intention to exit the Paris Climate Agreement</a>. While <a href="/r/scien...阅读全文
<p>I'm new to golang and trying to get a sense of how I should be writing my code. What are some examples of very high quality Go code?</p> <hr/>**评论：**<br/><br/>djherbis: <pre><p>Why not just read the std. lib? <a href="https://golang.org/pkg/" rel="nofollow">https://golang.or...阅读全文
<p>I want to send http requests from a fixed, outgoing port. How can I do this in Go?</p> <hr/>**评论：**<br/><br/>lstokeworth: <pre><p>Create <a href="https://godoc.org/net/http#Transport" rel="nofollow">Transport</a> with Dial function that calls <a href="https://godoc.org/...阅读全文
<p>Hello,</p> <p>To start off: Go is a great language. I love learning more about engineering software, and computing as a whole with this language. Leveraging Go, I plan to write an application for a wider community.</p> <p>On prospecting deployment options, I've come across an ARM-architecture server offeri...阅读全文
<p>If you want to try golang's webserver/database for free without installing anything. This isnt my project and I didnt build anything but it took me these 2 new years days off to finally figure all this out. Honestly db drivers and setting up a webserver and a database with a new language is kinda challenging and can take such a lo...阅读全文
<p>I was going through <a href="https://benchmarksgame.alioth.debian.org/u64q/regexredux.html">this</a> for the hell of it, and I saw that Go is generally quite quick. But there were a few outliers, and the most notable one for me was the regex code which was blown away by a ton of languages.</p> <hr/>**评论：**&...阅读全文
