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# Gin Web Framework <img align="right" width="159px" src="https://raw.githubusercontent.com/gin-gonic/logo/master/color.png"> [](https://travis-ci.org/gin-gonic/gin) [](https://codecov.io/gh/gin-gonic/gin) [](https://goreportcard.com/report/github.com/gin-gonic/gin) [](https://pkg.go.dev/github.com/gin-gonic/gin?tab=doc) [](https://gitter.im/gin-gonic/gin?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [](https://sourcegraph.com/github.com/gin-gonic/gin?badge) [](https://www.codetriage.com/gin-gonic/gin) [](https://github.com/gin-gonic/gin/releases) [](https://www.tickgit.com/browse?repo=github.com/gin-gonic/gin) Gin is a web framework written in Go (Golang). It features a martini-like API with performance that is up to 40 times faster thanks to [httprouter](https://github.com/julienschmidt/httprouter). If you need performance and good productivity, you will love Gin. ## Contents - [Gin Web Framework](#gin-web-framework) - [Contents](#contents) - [Installation](#installation) - [Quick start](#quick-start) - [Benchmarks](#benchmarks) - [Gin v1. stable](#gin-v1-stable) - [Build with jsoniter](#build-with-jsoniter) - [API Examples](#api-examples) - [Using GET, POST, PUT, PATCH, DELETE and OPTIONS](#using-get-post-put-patch-delete-and-options) - [Parameters in path](#parameters-in-path) - [Querystring parameters](#querystring-parameters) - [Multipart/Urlencoded Form](#multiparturlencoded-form) - [Another example: query + post form](#another-example-query--post-form) - [Map as querystring or postform parameters](#map-as-querystring-or-postform-parameters) - [Upload files](#upload-files) - [Single file](#single-file) - [Multiple files](#multiple-files) - [Grouping routes](#grouping-routes) - [Blank Gin without middleware by default](#blank-gin-without-middleware-by-default) - [Using middleware](#using-middleware) - [How to write log file](#how-to-write-log-file) - [Custom Log Format](#custom-log-format) - [Controlling Log output coloring](#controlling-log-output-coloring) - [Model binding and validation](#model-binding-and-validation) - [Custom Validators](#custom-validators) - [Only Bind Query String](#only-bind-query-string) - [Bind Query String or Post Data](#bind-query-string-or-post-data) - [Bind Uri](#bind-uri) - [Bind Header](#bind-header) - [Bind HTML checkboxes](#bind-html-checkboxes) - [Multipart/Urlencoded binding](#multiparturlencoded-binding) - [XML, JSON, YAML and ProtoBuf rendering](#xml-json-yaml-and-protobuf-rendering) - [SecureJSON](#securejson) - [JSONP](#jsonp) - [AsciiJSON](#asciijson) - [PureJSON](#purejson) - [Serving static files](#serving-static-files) - [Serving data from file](#serving-data-from-file) - [Serving data from reader](#serving-data-from-reader) - [HTML rendering](#html-rendering) - [Custom Template renderer](#custom-template-renderer) - [Custom Delimiters](#custom-delimiters) - [Custom Template Funcs](#custom-template-funcs) - [Multitemplate](#multitemplate) - [Redirects](#redirects) - [Custom Middleware](#custom-middleware) - [Using BasicAuth() middleware](#using-basicauth-middleware) - [Goroutines inside a middleware](#goroutines-inside-a-middleware) - [Custom HTTP configuration](#custom-http-configuration) - [Support Let's Encrypt](#support-lets-encrypt) - [Run multiple service using Gin](#run-multiple-service-using-gin) - [Graceful shutdown or restart](#graceful-shutdown-or-restart) - [Third-party packages](#third-party-packages) - [Manually](#manually) - [Build a single binary with templates](#build-a-single-binary-with-templates) - [Bind form-data request with custom struct](#bind-form-data-request-with-custom-struct) - [Try to bind body into different structs](#try-to-bind-body-into-different-structs) - [http2 server push](#http2-server-push) - [Define format for the log of routes](#define-format-for-the-log-of-routes) - [Set and get a cookie](#set-and-get-a-cookie) - [Testing](#testing) - [Users](#users) ## Installation To install Gin package, you need to install Go and set your Go workspace first. 1. The first need [Go](https://golang.org/) installed (**version 1.12+ is required**), then you can use the below Go command to install Gin. ```sh $ go get -u github.com/gin-gonic/gin ``` 2. Import it in your code: ```go import "github.com/gin-gonic/gin" ``` 3. (Optional) Import `net/http`. This is required for example if using constants such as `http.StatusOK`. ```go import "net/http" ``` ## Quick start ```sh # assume the following codes in example.go file $ cat example.go ``` ```go package main import "github.com/gin-gonic/gin" func main() { r := gin.Default() r.GET("/ping", func(c *gin.Context) { c.JSON(200, gin.H{ "message": "pong", }) }) r.Run() // listen and serve on 0.0.0.0:8080 (for windows "localhost:8080") } ``` ``` # run example.go and visit 0.0.0.0:8080/ping (for windows "localhost:8080/ping") on browser $ go run example.go ``` ## Benchmarks Gin uses a custom version of [HttpRouter](https://github.com/julienschmidt/httprouter) [See all benchmarks](/BENCHMARKS.md) | Benchmark name | (1) | (2) | (3) | (4) | | ------------------------------ | ---------:| ---------------:| ------------:| ---------------:| | BenchmarkGin_GithubAll | **43550** | **27364 ns/op** | **0 B/op** | **0 allocs/op** | | BenchmarkAce_GithubAll | 40543 | 29670 ns/op | 0 B/op | 0 allocs/op | | BenchmarkAero_GithubAll | 57632 | 20648 ns/op | 0 B/op | 0 allocs/op | | BenchmarkBear_GithubAll | 9234 | 216179 ns/op | 86448 B/op | 943 allocs/op | | BenchmarkBeego_GithubAll | 7407 | 243496 ns/op | 71456 B/op | 609 allocs/op | | BenchmarkBone_GithubAll | 420 | 2922835 ns/op | 720160 B/op | 8620 allocs/op | | BenchmarkChi_GithubAll | 7620 | 238331 ns/op | 87696 B/op | 609 allocs/op | | BenchmarkDenco_GithubAll | 18355 | 64494 ns/op | 20224 B/op | 167 allocs/op | | BenchmarkEcho_GithubAll | 31251 | 38479 ns/op | 0 B/op | 0 allocs/op | | BenchmarkGocraftWeb_GithubAll | 4117 | 300062 ns/op | 131656 B/op | 1686 allocs/op | | BenchmarkGoji_GithubAll | 3274 | 416158 ns/op | 56112 B/op | 334 allocs/op | | BenchmarkGojiv2_GithubAll | 1402 | 870518 ns/op | 352720 B/op | 4321 allocs/op | | BenchmarkGoJsonRest_GithubAll | 2976 | 401507 ns/op | 134371 B/op | 2737 allocs/op | | BenchmarkGoRestful_GithubAll | 410 | 2913158 ns/op | 910144 B/op | 2938 allocs/op | | BenchmarkGorillaMux_GithubAll | 346 | 3384987 ns/op | 251650 B/op | 1994 allocs/op | | BenchmarkGowwwRouter_GithubAll | 10000 | 143025 ns/op | 72144 B/op | 501 allocs/op | | BenchmarkHttpRouter_GithubAll | 55938 | 21360 ns/op | 0 B/op | 0 allocs/op | | BenchmarkHttpTreeMux_GithubAll | 10000 | 153944 ns/op | 65856 B/op | 671 allocs/op | | BenchmarkKocha_GithubAll |