Tendermint 由于工作原因2年前开始接触Hyperledger Fabric，其社区还是很活跃的，已经从当年的v0.7发展到如今v2.0了。但不得不说Fabric的体量还是挺大的，对于二次开发来说有一定难度。所以最近开始转向Tendermint，因为Tendermint更简单、易于理解、性能更高（当然这是Tendermint自己标榜的），不过事实上相对于Fabric确实更易于理解，更方便开发区块链的应用系统。 摘要 Tendermint由两个主要部分组成，一个负责共识，一个负责应用程序接口，共识引擎称作Tendermint Core，应用程序接口称作ABCI（Application BlockChain Interface），利用ABCI可以开发自己业务逻辑。而Tendermint ...阅读全文
<p>This is basically what I want to do:</p> <pre><code>// Hypothetical checker for seeing if some set of keys are in a SQL DB type Checker interface { KeysInDb(keys []string) ([]bool, error) KeyInDb(key string) (bool, error) } // This is the weird part func (c Checker) KeyInDb(key string) (bool, error) { result...阅读全文
确保所有客户端请求均得到正确处理 让我们从Pod的客户端的剖析（客户端消费Pod提供的服务）的角度来看Pod的生命周期。我们希望确保妥善处理客户端的请求，因为如果在pod启动或关闭时连接开始中断，则很麻烦。 Kubernetes本身并不能保证不会发生这种情况，所以让我们看看我们需要采取什么措施来防止这种情况发生。 在Pod启动时防止客户端连接断开 如果您了解service和service endpoints的工作方式，那么确保在pod启动时正确处理每个连接非常简单。Pod启动后，会将其作为端点添加到对应的服务（Kubernetes 采用了基于标签的服务发现方式，它们的标签选择器与Pod的标签匹配）。Pod还需要向Kubernetes发出信号，表明已经准备好（通过readiness probe...阅读全文
<p>Unbelievable it's been 73 years. Never forget the sacrifices. </p> <p>If you enjoy history, please watch HBO's Band of Brothers. It is a fantastic series that follows the formation of E Company, 506th Parachute Infantry Regiment, 101st Airborne. Currahee! </p> <p><a href="https://youtu.be/...阅读全文
<p>From the way I understand, autocert package needs port 80 open to perform http challenge, does it mean it is impossible to run more than one service on the same machine?</p> <p>Lets say there's one service listening on 443, and another on 8080. Both need certificates, but if first service already listening on port 80, ...阅读全文
<p>For the example mentioned <a href="https://aws.amazon.com/blogs/compute/announcing-go-support-for-aws-lambda/" rel="nofollow">here</a>, how would you test it in your local development environment? I do not mean unit tests, but manual testing. How do I call the lambda service from a web browser or using curl and ...阅读全文
Tendermint 由于工作原因2年前开始接触Hyperledger Fabric，其社区还是很活跃的，已经从当年的v0.7发展到如今v2.0了。但不得不说Fabric的体量还是挺大的，对于二次开发来说有一定难度。所以最近开始转向Tendermint，因为Tendermint更简单、易于理解、性能更高（当然这是Tendermint自己标榜的），不过事实上相对于Fabric确实更易于理解，更方便开发区块链的应用系统。 摘要 Tendermint由两个主要部分组成，一个负责共识，一个负责应用程序接口，共识引擎称作Tendermint Core，应用程序接口称作ABCI（Application BlockChain Interface），利用ABCI可以开发自己业务逻辑。而Tendermint ...阅读全文
golang快速入门[2.3]-go语言开发环境配置-linuxlinux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 14:1...阅读全文
<p>Of any Go project you have done/been involved in, which is your favorite and why?</p> <hr/>**评论：**<br/><br/>KopfKrieg: <pre><p>Well, not directly involved, but: <a href="https://syncthing.net/">Syncthing</a></p></pre>poxopox: <pre><p>I think docker is one of my...阅读全文
<p>I've just been taking a look at the issues on GitHub to see if other people are experiencing an issue that I am when using Glide, and then realised that the last commit was on the 14th of December last year. I know just over a month doesn't seem like a long time, but I'd imagine that Glide would be the kind of proje...阅读全文
<p>I remember seeing a GitHub repo about a wrapper around a AWS Lambda handler to convert it to a normal http.HandlerFunc somewhere but I can't seem to find it now.</p> <p>Anyone knows where it is? Or does it even exist?</p> <hr/>**评论：**<br/><br/>Jamo008: <pre><p><a href="https:/...阅读全文
<p>I used Apache in the past, for hosting PHP websites. I know very little about NGINX but from what I understand it's also a web/mail server. </p> <p>How do most developers use Go on the server, do they install the web server software together with the Go program, or do they use the stdlib http/smtp server? </p> &...阅读全文
<p>Just curious about what people are getting their hands dirty with.</p> <p>I'm currently building a project involving MongoDB and some APIs to create a website and at the same time learn some Go.</p> <hr/>**评论：**<br/><br/>gbrayut: <pre><p>About to start month 6 at my "new&...阅读全文
<p>Hello! Could anyone share best practice for subj. I have 2 PC. One for internet and one for dev. </p> <p>Internet PC has no admin rights so no installation. Only portable. </p> <p>Dev PC has no Internet connection. But has admin rights. So install Go env, gogland and so - is not problem.</p> <p>Probl...阅读全文
Go语言的依赖管理随着版本的更迭正逐渐完善起来。 windows开启go module：set GO111MODULE=on Linux开启go module：export GO111MODULE=on 依赖管理 为什么需要依赖管理 最早的时候，Go所依赖的所有的第三方库都放在GOPATH这个目录下面。这就导致了同一个库只能保存一个版本的代码。如果不同的项目依赖同一个第三方的库的不同版本，应该怎么解决？ godep Go语言从v1.5开始开始引入vendor模式，如果项目目录下有vendor目录，那么go工具链会优先使用vendor内的包进行编译、测试等。 godep是一个通过vender模式实现的Go语言的第三方依赖管理工具，类似的还有由社区维护准官方包管理工具dep。 安装 执行以下命令...阅读全文
<p>I've written a couple of web crawler-type programs in Go, and whenever I do, I run into the question of how many worker goroutines I should spawn. It has to be limited to keep from exhausting file descriptors, but what is a good limit? I usually just spawn 10 or 20 because those seem to give decent performance, but is there a good ...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
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
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
<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
<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
<p>Hello, Ive briefly fiddled with golang and really like it so far. I love the simplicity of go routines. I work mostly with large python projects at work and have been thinking of starting to implement go instead. However, most of the projects I read about use go to do web development. I understand that go was designed for that application ...阅读全文
<p>Hi, I would like to present you a new project I have created, Proxy changer, hosted in <a href="https://github.com/okelet/proxychanger" rel="nofollow">https://github.com/okelet/proxychanger</a>. It's a Linux desktop application, that runs as a indicator, that allows you to configure multiple proxies and ...阅读全文
一、下载 去Golang官网 )下载需要的版本，这里直接下载苹果版的pkg 二、 安装 直接双击运行pkg，在弹出的安装页面直接安装就行了。 三、测试 输入go version测试go版本。用go env可以查看go环境的变量 默认安装的 GOROOT="/usr/local/go" GOPATH="/Users/admin/go" > go version go version go1.14.3 darwin/amd64 >go env GO111MODULE="" GOARCH="amd64" GOBIN="" GOCACHE="/Users/admin/Library/Caches/go-build" GOENV="/Users/admin/Library/Application Su...阅读全文
# 前言本文主要是写给那些想从事中间件开发的同学看的 ：）如果你没有这个打算，那么本文的学习路线非但不实用，还可能会影响你正常的工作 ：）# 什么是中间件开发？随着国内软件行业的发展，国内互联网公司规模越来越大，业务越来越复杂，随之使用大量的中间件来提高后台服务性能。由此产生了中间件开发和维护人员。诚然，在小公司，中间件，例如缓存，MQ，RPC 等服务，极大可能是由业务开发人员自己维护，或者委托第三方云平台运维（支付一些费用）。但，如果后台开发超过 200 人，基本就会组建自己的中间件或者基础架构团队，用于维护后台服务器基础架构和中间件。更大规模的公司，则由于各种各样的原因（性能，KPI），会自己开发中间件，简称自研。这要求中间件团队需要更多的人员。# 中间件开发人员需要哪些素质？既然需要中...阅读全文
<p>If your coding something small with sensitive elements which has a web endpoint accessible to 1-5 people what is your go to solution.</p> <p><strong>Traits</strong></p> <ul> <li>Secure</li> <li>Simple with small code footprint</li> <li>Access setup can be manual (no forgot...阅读全文
<p>Background: I'm a sophomore and computer science major, and I love working with golang. I worked on a privacy-oriented anonymous authentication proxy last summer in go, and want to continue working in Go.</p> <p>Actual Question: What are some companies/institutions that work in Go, and are looking for interns in the Un...阅读全文
<p>Hey guys, </p> <p>Does anyone have any links to some (beginner) cool projects I can do in go and deploy on a Raspberry Pi?</p> <hr/>**评论：**<br/><br/>miggimaggi: <pre><p>dns proxy for ad blocking: <a href="https://github.com/seedifferently/nogo" rel="nofollow">https://gi...阅读全文
<p>I was googling around for code examples using the crypto package and found <a href="https://blog.cloudflare.com/go-crypto-bridging-the-performance-gap/" rel="nofollow">this 2014 post on Cloudflare's blog.</a></p> <p>They apparently forked Go and built their own elliptic curves and AES-GCM in...阅读全文
<p>I am curious how do you people work with Go in an enterprise environments when you often need to talk to unknown (often shitty) SOAP endpoints or consume messages from proprietary MQs etc. How do you deal with it ?</p> <hr/>**评论：**<br/><br/>egonelbre: <pre><p>It really doesn't differ much from ot...阅读全文
<p>I am fairly new to programming and this is my first project. Just wanted to share and know what you think.</p> <p><a href="https://github.com/rahulwa/camouflage" rel="nofollow">https://github.com/rahulwa/camouflage</a></p>...阅读全文
<p>Hello! I think it's will be useful for quickly checking and verify your proxy list from a file. I'm also available for any suggestion. <a href="https://github.com/asm-jaime/go-proxycheck" rel="nofollow">https://github.com/asm-jaime/go-proxycheck</a></p> <hr/>**评论：**<br/><br/&...阅读全文
<p>So I'm trying to generate proxy objects to wrap some existing objects. I'd like to create proxies which add logging without having to write the logging in to each of my objects and method calls.</p> <p>I know I can do this by writing a proxy myself, but I have a lot of objects that I don't want to chan...阅读全文
<p>Assuming you're using the <a href="https://golang.org/doc/code.html#Workspaces">canonical</a> workspace layout, you keep your projects under $GOHOME/src/$YourGitHost/$YourProjectName, and it will install into $GOHOME/bin/YouProjectName.</p> <p>But what about a webapp? Do you just keep it as a subdir...阅读全文
