go的开始/自动重载代码
go 编码开始
如何创建go 的项目
如何使用go run命令运行go程序
创建main.go 文件
package main
import (
"fmt"
"net/http"
)
func handlerFunc(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, "<h1>Hello, world</h1>")
}
func main() {
http.HandleFunc("/", handlerFunc)
http.ListenAndServe(":3000", nil)
}
Go应用中 package main 的规则
标准库 fmt 包的基本使用
fmt.Fprint(w, "<h1>Hello, 这里是 goblog</h1>")
标准库 http 包的基本使用
func handlerFunc(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, "<h1>Hello, 这里是 goblog</h1>")
}
func main() {
http.HandleFunc("/", handlerFunc)
http.ListenAndServe(":3000", nil)
}
http.ListenAndServe
http.ListenAndServe(":3000", nil)
http.HandleFunc
fmt.Fprint(w, "<h1>Hello, 这里是 goblog</h1>")
http.Request
http.ResponseWriter
http 包中如何通过url 路径来处理业务逻辑
http.HandleFunc("/", handlerFunc)
package main
import (
"fmt"
"net/http"
)
func handlerFunc(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, "<h1>Hello, 这里是 goblog</h1>")
fmt.Fprint(w, "请求路径为："+r.URL.Path)
}
func main() {
http.HandleFunc("/", handlerFunc)
http.ListenAndServe(":3000", nil)
}
fmt.Fprint(w, "请求路径为："+r.URL.Path)
go run main.go
package main
import (
"fmt"
"net/http"
)
func handlerFunc(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/" {
fmt.Fprint(w, "<h1>Hello, 这里测试</h1>")
} else if r.URL.Path == "/about" {
fmt.Fprint(w, "关于我们")
} else {
fmt.Fprint(w, "<h1>请求页面未找到！</h1>")
}
}
func main() {
http.HandleFunc("/", handlerFunc)
http.ListenAndServe(":3000", nil)
}
如何使用 air 来自动重载代码
安装air
GO111MODULE=on go install github.com/cosmtrek/air@latest
air -v
__ _ ___
/ /\ | | | |_)
/_/--\ |_| |_| \_ , built with Go
air
air
