写作原因：最近学习go_http，从网上复制代码进行测试研究，发现当客户端收不到服务端请求时会导致整个程序退出；
网上代码
func httpClient4() {
var endPoint string = "http://localhost:12345/hello"
req, err := http.NewRequest("POST", endPoint, bytes.NewBuffer([]byte("Post this data")))
if err != nil {
fmt.Println("fengbi1")
log.Fatalf("Error Occured. %+v", err)
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
// use httpClient to send request
response, err := httpClient.Do(req)
if response != nil {
fmt.Println("fengbi2")
defer response.Body.Close()
}
if err != nil && response == nil {
fmt.Println("fengbi3")
//log.Fatalf("Error sending request to API endpoint. %+v", err)
} else {
// Close the connection to reuse it
defer response.Body.Close()
// Let's check if the work actually is done
// We have seen inconsistencies even when we get 200 OK response
body, err := ioutil.ReadAll(response.Body)
if err != nil {
//fmt.Println("Couldn't parse response body. %+v", err)
log.Fatalf("Couldn't parse response body. %+v", err)
}
fmt.Println("Response Body:", string(body))
//log.Println("Response Body:", string(body))
}
}
然后开始上网找答案，有一位博主说是需要对请求返回的response内容做判断，然后再关闭response，即这段代码
// use httpClient to send request
response, err := httpClient.Do(req)
if response != nil {
fmt.Println("fengbi2")
defer response.Body.Close()
}
然后测试还是不行，错误信息如下图：
然后仔细查看测试代码发现，问题出在log.Fatalf( )函数，查看go源码如下图：
log包中打印的函数很多，其中带有Fatal前缀的里面，调用了l.printf()输出，随后调用了os.exit(1)退出程序；
所以，只需要注释掉log.Fatalf( )函数就可以，同时别忘了return，不然还是会报错的
