前言
Gin 是一款用 Go(Golang) 编写的 web 框架
Gin is a web framework written in Go (Golang). It features a martini-like API with much better performance, up to 40 times faster thanks to httprouter
因为 httprouter, 它提供了更高的性能
这里演示一下 Gin 渲染 AsciiJSON
gin 的 API 可以参考 API REFFERENCE
Tip: 当前的版本为 Gin 1.2 和 Go 1.10 (但是实验环境下，Go没有使用最新的版本)
操作
系统环境
代码语言：javascript复制[root@h160 ~]# hostnamectl
Static hostname: h160
Icon name: computer-vm
Chassis: vm
Machine ID: d46f9440d4be429ea66b726977adf233
Boot ID: a0fc6a1b4f124e39a27866d4df0701fa
Virtualization: kvm
Operating System: CentOS Linux 7 (Core)
CPE OS Name: cpe:/o:centos:centos:7
Kernel: Linux 3.10.0-862.2.3.el7.x86_64
Architecture: x86-64
[root@h160 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 52:54:00:c9:c7:04 brd ff:ff:ff:ff:ff:ff
inet 10.0.2.15/24 brd 10.0.2.255 scope global noprefixroute dynamic eth0
valid_lft 84363sec preferred_lft 84363sec
inet6 fe80::5054:ff:fec9:c704/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:48:f4:2c brd ff:ff:ff:ff:ff:ff
inet 192.168.56.160/24 brd 192.168.56.255 scope global noprefixroute eth1
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:fe48:f42c/64 scope link
valid_lft forever preferred_lft forever
[root@h160 ~]# go version
go version go1.9.4 linux/amd64
[root@h160 ~]#进入 GOPATH
代码语言：javascript复制[vagrant@h160 ~]$ echo $GOPATH
/vagrant/go
[vagrant@h160 ~]$ cd $GOPATH
[vagrant@h160 go]$ pwd
/vagrant/go
[vagrant@h160 go]$ 代码注解
代码语言：javascript复制package main //指明此包为 main 包
import ( //使用这种方式导入多个包可以更为简洁
"net/http" //导入这个以调用 http.StatusOK
"github.com/gin-gonic/gin" //导入 gin 包
)
func main() { // 一个main包中有且只有一个main 函数
r := gin.Default() //使用 gin.Default() 方法生成一个引擎实例,这个实例默认情况下已经将 Logger Recovery 进行了装载
r.GET("/someJSON", someJSONP) //GET方法匹配到后交由 someJSONP 来处理
r.Run(":8080") //在 0.0.0.0:8080 上启监听
}
func someJSONP(c *gin.Context) { //构建一个 someJSON 函数来处理请求
data := map[string]interface{}{
"lang": "GO 语言",
"tag": "<br>",
"desc": "其它",
}
c.AsciiJSON(http.StatusOK, data)
//AsciiJSON 可以将给定的结构体以 JSON 的格式写到 body 里面，同时将 UTF8 的字符转化为 ASCII 串，回复的 Content-Type 为 "application/json".
}编译执行
代码语言：javascript复制[vagrant@h160 go]$ go run hello.go
[GIN-debug] [WARNING] Now Gin requires Go 1.6 or later and Go 1.7 will be required soon.
[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.
[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.
- using env: export GIN_MODE=release
- using code: gin.SetMode(gin.ReleaseMode)
[GIN-debug] GET /someJSON --> main.someJSONP (3 handlers)
[GIN-debug] Listening and serving HTTP on :8080
[GIN] 2018/07/20 - 08:55:40 | 200 | 147.255µs | 192.168.56.105 | GET /someJSON
...
...
...客户的请求为
代码语言：javascript复制[vagrant@h105 ~]$ curl -v 'http://192.168.56.160:8080/someJSON'* About to connect() to 192.168.56.160 port 8080 (#0)
* Trying 192.168.56.160...
* Connected to 192.168.56.160 (192.168.56.160) port 8080 (#0)
> GET /someJSON HTTP/1.1
> User-Agent: curl/7.29.0
> Host: 192.168.56.160:8080
> Accept: */*
>
< HTTP/1.1 200 OK
< Content-Type: application/json
< Date: Fri, 20 Jul 2018 00:55:40 GMT
< Content-Length: 71
<
* Connection #0 to host 192.168.56.160 left intact
{"desc":"u5176u5b83","lang":"GO u8bedu8a00","tag":"u003cbru003e"}[vagrant@h105 ~]$
[vagrant@h105 ~]$
[vagrant@h105 ~]$总结
构建一个简单的 web 还是非常快捷的
可以以 AsciiJSON 的格式进行输出
