go 语言10
更多干货
代码地址：
https://github.com/csy512889371/learndemo/tree/master/go/golearn
概述
-
语言传统同步方式
-
atomic
-
waitGroup
-
mutex
-
cond
-
-
http client
同步
package main
import (
"fmt"
"sync"
"time"
)
type atomicInt struct {
value int
lock sync.Mutex
}
func (a *atomicInt) increment() {
fmt.Println("safe increment")
func() {
a.lock.Lock()
defer a.lock.Unlock()
a.value++
}()
}
func (a *atomicInt) get() int {
a.lock.Lock()
defer a.lock.Unlock()
return a.value
}
func main() {
var a atomicInt
a.increment()
go func() {
a.increment()
}()
time.Sleep(time.Millisecond)
fmt.Println(a.get())
}http client
package main
import (
"fmt"
"net/http"
"net/http/httputil"
)
func main() {
request, err := http.NewRequest(
http.MethodGet,
"http://www.ctoedu.com", nil)
request.Header.Add("User-Agent",
"Mozilla/5.0 (iPhone; CPU iPhone OS 10_3 like Mac OS X) AppleWebKit/602.1.50 (KHTML, like Gecko) CriOS/56.0.2924.75 Mobile/14E5239e Safari/602.1")
client := http.Client{
CheckRedirect: func(
req *http.Request,
via []*http.Request) error {
fmt.Println("Redirect:", req)
return nil
},
}
resp, err := client.Do(request)
if err != nil {
panic(err)
}
defer resp.Body.Close()
s, err := httputil.DumpResponse(resp, true)
if err != nil {
panic(err)
}
fmt.Printf("%s\n", s)
}