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 如何上传文件
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)
[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 ~]#
[vagrant@h160 ~]$ echo $GOPATH
/vagrant/go
[vagrant@h160 ~]$ cd $GOPATH
[vagrant@h160 go]$ pwd
/vagrant/go
[vagrant@h160 go]$
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
"fmt" //导入 fmt,可以进行格式化输出
"log" //使用 log 包来进行日志生成
"net/http" // 导入 net/http 可以使用其中的 http.StatusOK
"github.com/gin-gonic/gin" //导入 gin 包
)
func main() {
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.MaxMultipartMemory = 8 << 20 // 8 MiB
r.POST("/upload", func(c *gin.Context) { //使用 POST 方法 func (group *RouterGroup) POST(relativePath string, handlers ...HandlerFunc) IRoutes ,POST 是 router.Handle("POST", path, handle) 的快捷方式
file, _ := c.FormFile("file") //func (c *Context) FormFile(name string) (*multipart.FileHeader, error) , FormFile returns the first file for the provided form key.
log.Println(file.Filename) //console 打印出文件名
c.SaveUploadedFile(file, "/tmp/test") // 将文件存到指定的位置 func (c *Context) SaveUploadedFile(file *multipart.FileHeader, dst string) error
c.String(http.StatusOK, fmt.Sprintf("'%s' uploaded!", file.Filename)) //将文件名进行打印,也在客户端反馈成功的信息
})
r.Run(":8080") //在 0.0.0.0:8080 上启监听
}
[root@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] POST /upload --> main.main.func1 (3 handlers)
[GIN-debug] Listening and serving HTTP on :8080
test.txt
[GIN] 2018/07/09 - 15:29:08 | 200 | 202.794185ms | 192.168.56.105 | POST /upload
...
...
...
客户的请求为
[vagrant@h105 ~]$ echo abc > test.txt
[vagrant@h105 ~]$ cat test.txt
abc
[vagrant@h105 ~]$
[vagrant@h105 ~]$ curl -X POST http://192.168.56.160:8080/upload -F "file=@./test.txt" -H "Content-Type: multipart/form-data"
'test.txt' uploaded![vagrant@h105 ~]$
[vagrant@h105 ~]$
结果同时输出到了客户端和console
服务端的目标路径里也多了一个内容相同的文件,并且创建时间也是吻合的
[vagrant@h160 ~]$ cat /tmp/test
abc
[vagrant@h160 ~]$ ll /tmp/test
-rw-r--r--. 1 root root 4 Jul 9 15:29 /tmp/test
[vagrant@h160 ~]$
构建一个简单的 web 还是非常快捷的
可以同时通过 SaveUploadedFile 方法来保存上传的文件
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本文系转载,前往查看
如有侵权,请联系 cloudcommunity@tencent.com 删除。