在go例程中尝试ListenAndServer
时,我收到错误:
package main
import (
"fmt"
"io/ioutil"
"net/http"
)
func main() {
http.HandleFunc("/static/", myHandler)
go func() {
http.ListenAndServe("localhost:80", nil)
}()
fmt.Printf("we are here")
resp, _ := http.Get("localhost:80/static")
ans, _ := ioutil.ReadAll(resp.Body)
fmt.Printf("response: %s", ans)
}
func myHandler(rw http.ResponseWriter, req *http.Request) {
fmt.Printf(req.URL.Path)
}
错误:
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x48 pc=0x401102]
goroutine 1 [running]:
panic(0x6160c0, 0xc0420080a0)
c:/go/src/runtime/panic.go:500 +0x1af
main.main()
C:/gowork/src/exc/14.go:20 +0xc2
exit status 2
我想要的只是创建一个http
服务器。然后测试它并从代码连接到它。 Go有什么问题? (还是跟我一起?)
答案 0 :(得分:1)
您必须使用(使用" http://"在这种情况下)
resp, _ := http.Get("http://localhost:80/static")
并在使用响应之前检查错误,以防请求失败
resp, err := http.Get("http://localhost:80/static")
if err != nil {
// do something
} else {
ans, _ := ioutil.ReadAll(resp.Body)
fmt.Printf("response: %s", ans)
}
此外,如果您想从处理程序获得任何响应,则必须在其中编写响应。
func myHandler(rw http.ResponseWriter, req *http.Request) {
fmt.Printf(req.URL.Path)
rw.Write([]byte("Hello World!"))
}