Go常用库-网络框架Gin(2) - Gin

一. 写在前面:

Gin版本: v1.5.0
Gin是Go最流行的Lib(目前排名仅次于Logrus),使用方便,可扩展性好.源码量也不大,组织的也很好,读起来很舒服.也是因为人人都用,况且各路大神总结的都很好,各个方面都讲到了.这里也就大概整理下.

二. Gin使用

1. 官方文档:
   https://gin-gonic.com/zh-cn/docs/
   https://github.com/gin-gonic/examples

2. bilibili视频教程
   https://www.bilibili.com/video/av73142413

三. 源码分析

1. 依赖

依赖	说明
sse	Server-sent events-需要浏览器端支持服务器推送
validator/v10	验证器
protobuf	google的二进制传输协议,Http/2
json-iterator/go	可选的JSON工具包,在interna/json中可配置,默认用原生的.
go-isatty	判断终端类型的LIB
testify	测试工具
go/codec	编码工具
yaml.v2	对yaml格式的支持

2. 源码说明

源码分析就太多了,推荐几个感觉写的比较好的.

大话图解gin源码

Go Gin源码学习系列
https://segmentfault.com/a/1190000019101583
https://segmentfault.com/a/1190000019111688
https://segmentfault.com/a/1190000019130634
https://segmentfault.com/a/1190000019149860
https://segmentfault.com/a/1190000019182024

Golang Gin 实战系列
https://www.flysnow.org/2019/12/10/golang-gin-quick-start.html
https://www.flysnow.org/2019/12/12/golang-gin-restful-api.html
https://www.flysnow.org/2019/12/13/golang-gin-parameters-in-path.html
https://www.flysnow.org/2019/12/15/golang-gin-query-parameters-source-code-analysis.html
https://www.flysnow.org/2019/12/18/golang-gin-query-parameters-array-map.html
https://www.flysnow.org/2019/12/23/golang-gin-form-data.html
https://www.flysnow.org/2019/12/25/golang-gin-group-router.html
https://www.flysnow.org/2019/12/29/golang-gin-json-rendering.html
https://www.flysnow.org/2020/01/01/golang-gin-jsonp-and-hijacking.html
https://www.flysnow.org/2020/01/03/golang-gin-xml-rendering.html
https://www.flysnow.org/2020/01/09/golang-gin-html-rendering.html

gin 源码剖析

从 net/http 入门到 Gin 源码梳理

Gin源码阅读与分析

拆轮子系列：gin框架

四. 个人心得

• Gin通过binding包解析httpRequest,并且能做到VO对应,自动把Request中的Body对应到具体的结构体中,比起原生的Http进一步减轻了具体的工作.
• Gin通过Render包构造Response,通过统一的Render方法把各种结构写入REpsonse中去.
• Gin核心结构 - Context

// Context is the most important part of gin. It allows us to pass variables between middleware,
// manage the flow, validate the JSON of a request and render a JSON response for example.
type Context struct {
    writermem responseWriter
    Request   *http.Request
    Writer    ResponseWriter

    Params   Params
    handlers HandlersChain
    index    int8
    fullPath string

    engine *Engine

    // Keys is a key/value pair exclusively for the context of each request.
    Keys map[string]interface{}

    // Errors is a list of errors attached to all the handlers/middlewares who used this context.
    Errors errorMsgs

    // Accepted defines a list of manually accepted formats for content negotiation.
    Accepted []string

    // queryCache use url.ParseQuery cached the param query result from c.Request.URL.Query()
    queryCache url.Values

    // formCache use url.ParseQuery cached PostForm contains the parsed form data from POST, PATCH,
    // or PUT body parameters.
    formCache url.Values
}

Context结构把请求,返回都放一起了,这样写Handler就更方便了.