英文:
Creating a TCP client in golang
问题
你好，以下是你提供的内容的中文翻译：
嗨，我正在尝试学习使用Go语言进行套接字编程，我正在按照这个教程进行学习：
http://synflood.at/tmp/golang-slides/mrmcd2012.html#1
这是教程的最终结果，放在一个页面上。
https://github.com/akrennmair/telnet-chat/blob/master/03_chat/chat.go
我对如何编写该程序的客户端部分感到困惑，我创建了一个连接并拨号到与服务器运行在同一端口/ IP上，但是从那里我就不知道该怎么做了。我已经为新创建的连接准备了read()和write()函数，但不知道在哪里分隔读取或其他操作。考虑到文本输入在服务器端处理，我想我只需要进行某种形式的读取？
package main
import (
"bufio"
"fmt"
"net"
"os"
)
func main() {
conn, err := net.Dial("tcp", "127.0.0.1:6000")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
for {
fmt.Println(bufio.NewReader(conn).ReadString([]byte("\n")))
}
}
希望对你有帮助！
英文:
Hi i'm attempted to learn some socket programming in golang, I'm following along with this tutorial
http://synflood.at/tmp/golang-slides/mrmcd2012.html#1
Here is the final result of the tutorial on one page.
https://github.com/akrennmair/telnet-chat/blob/master/03_chat/chat.go
I'm confused on how to write the client side of this program, I create a connection and dial into the same port/ip as the server is running on but from there I don't know. I have read() and write() functions for the newly created connection but no idea where to delimit the read or anything. Considering the text input is handeled in the server I imagine I'd only need to do a read of some kind?
package main
import (
"bufio"
"fmt"
"net"
"os"
)
func main() {
conn, err := net.Dial("tcp", "127.0.0.1:6000")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
for {
fmt.Println(bufio.NewReader(conn).ReadString([]byte("\n")))
}
}
答案1
得分: 12
bufio.NewReader应该只在代码中使用一次，在你的情况下，就在for之前使用。例如connbuf := bufio.NewReader(conn)。然后你可以在connbuf上使用ReadString，它会返回字符串和可能的错误。例如：
connbuf := bufio.NewReader(conn)
for {
str, err := connbuf.ReadString('\n')
if err != nil {
break
}
if len(str) > 0 {
fmt.Println(str)
}
}
我检查len和err是因为ReadString可能会返回数据和错误（连接错误、连接重置等），所以你需要同时检查它们。
英文:
bufio.NewReadershould be used only once, in your case, just before the for. For example connbuf := bufio.NewReader(conn). Then you can use ReadString on connbuf, that returns the string and maybe an error. For example:
connbuf := bufio.NewReader(conn)
for{
str, err := connbuf.ReadString('\n')
if err != nil {
break
}
if len(str) > 0 {
fmt.Println(str)
}
}
I'm checking lenand err because ReadString may return data and an error (connection error, connection reset, etc.) so you need to check both.
答案2
得分: 1
以下是翻译好的内容：
这是一个简单的解决方案，如果你想读取所有接收到的数据。
connbuf := bufio.NewReader(c.m_socket)
// 读取第一个字节并设置底层缓冲区
b, _ := connbuf.ReadByte()
if connbuf.Buffered() > 0 {
var msgData []byte
msgData = append(msgData, b)
for connbuf.Buffered() > 0 {
// 逐字节读取，直到缓冲数据为空
b, err := connbuf.ReadByte()
if err == nil {
msgData = append(msgData, b)
} else {
log.Println("-------> 无法读取的字符...", b)
}
}
// msgData 现在包含了缓冲的数据...
}
英文:
Here is a simple solution if you want to read all received data.
connbuf := bufio.NewReader(c.m_socket)
// Read the first byte and set the underlying buffer
b, _ := connbuf.ReadByte()
if connbuf.Buffered() > 0 {
var msgData []byte
msgData = append(msgData, b)
for connbuf.Buffered() > 0 {
// read byte by byte until the buffered data is not empty
b, err := connbuf.ReadByte()
if err == nil {
msgData = append(msgData, b)
} else {
log.Println("-------> unreadable caracter...", b)
}
}
// msgData now contain the buffered data...
}
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