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mTLS Golang Example

Samples

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Go 语言教程

golang中国社区

go-gin-chat(Gin+websocket 的多人聊天室)

从零到一：用Golang编写机器人

Learn Go Programming

Go by Example

在线体验中心

标准库源码

go web极简框架

httprouter

go http 服务器编程

用golang+vue+mysql全栈制作一个博客

golang的public和private
type SomeClass struct {
  PublicVariable string  // 公共变量
  privateVariable string  // 私有变量
}

// 公共方法
func (c *SomeClass) PublicMethod() (result string) {
  return "This can be called by external modules"
}

// 私有方法
func (c *SomeClass) privateMethod() (result string) {
  return "This can only be called in SomeClass"
}

错误处理
func isValid(text string) (valid bool, err error) {
    if text == "" {
        return false, error("text cannot be empty")
    }
    return text == "valid text", nil
}

文件读写

创建文件夹
os.Mkdir(dname, os.ModeDir|os.ModePerm)
创建文件夹及全路径
os.MkdirAll(fullpath, os.ModeDir|os.ModePerm)
os.Create(fname)
删除文件
os.Remove(fname)
os.Rename(oldfname, newfname)

data, err := os.OpenFile("/dev/data.conf", os.O_RDWR, 0)
var r io.Reader
var w io.Writer
r = data
w = r.(io.Writer)

一次性读取文件
import "io/ioutil"
if bytes, err := ioutil.ReadFile("/dev/data.conf"); err {
    fmt.Println(string(bytes))
}

逐行读取文件
import (
    "bufio"
    "os"
    "fmt"
}
f, err := os.Open("/dev/data/conf")
fread := bufio.NewReader(f)
for {
    line, _, err := fread.ReadLine()
    if err == io.EOF {
        break
    }
    fmt.Println(string(line))
}

读取网页,编码转换
go get github.com/djimenez/iconv-go
import "net/html"

res, err := http.Get(baseUrl)
if err != nil {
    fmt.Println(err.Error())
} else {
defer res.Body.Close()
utfBody, err := iconv.NewReader(res.Body, "gb2312", "utf-8")
dom, err := goquery.NewDocumentFromReader(utfBody)

安装
wget https://golang.google.cn/dl/go1.18.linux-amd64.tar.gz
tar -zvxf go1.18.linux-amd64.tar.gz -C /usr/local

vim /etc/profile
export PATH=$PATH:/usr/local/go/bin

#golang env config
export GO111MODULE=on
export GOROOT=/usr/local/go 
export GOPATH=/home/gopath
export PATH=$PATH:$GOROOT/bin:$GOPATH/bin

#设置代理
go env -w GOPROXY=https://goproxy.cn,direct

go version
go env

vim-go安装

:help vim-go

安装gopls
:GoInstallBinaries

配置
let g:go_fmt_command = "goimports"    # Run goimports along gofmt on each save     
let g:go_auto_type_info = 1           # Automatically get signature/type info for object under cursor 

autocmd FileType html,css,xml,php,vue,wxss,wxml,go EmmetInstall
autocmd FileType go set omnifunc=gocomplete#Complete

命令
:GoRun :GoBuild :GoInstall   

:GoDef          # goto definition of object under cursor   
gd              # also has the same effect
Ctrl-O / Ctrl-I # hop back to your source file/return to definition

:GoDoc          # opens up a side window for quick documentationn   
K               # also has the same effect

:GoTest         # run every *_test.go file and report results   
:GoTestFunc     # or just test the function under your cursor   
:GoCoverage     # check your test coverage   
:GoAlternate	# switch bewteen your test case and implementation   

:GoImport       # manage and name your imports   
:GoImportAs   
:GoDrop   
   
:GoRename       # precise renaming of identifiers   
   
:GoLint         # lint your code   
:GoVer   
:GoErrCheck   
   
:GoAddTags      # manage your tags   
:GoRemoveTags   

Golang的反射reflect深入理解和示例

reflect & interface

Golang的gRPC也是通过反射实现的。
在Golang的实现中，每个interface变量都有一个对应pair，pair中记录了实际变量的值和类型:
(value, type)
反射主要与Golang的interface类型相关（它的type是concrete type），只有interface类型才有反射一说。
reflect的基本功能TypeOf和ValueOf