英文:
How do I convert a string of escape sequences to bytes?
问题
创建一个需要处理一些数据的TCP服务器。我有一个net.Conn实例"connection"，我将从中读取数据。代码片段的下半部分出现了一个错误，指出无法将'esc'值用作字节值。
const (
esc = "\a\n"
)
....
c := bufio.NewReader(connection)
data, err := c.ReadBytes(esc)
显然，需要进行一些转换，但是当我尝试以下代码时：
const (
esc = "\a\n"
)
....
c := bufio.NewReader(connection)
data, err := c.ReadBytes(byte(esc))
编译器指出我无法将esc转换为字节。这是因为我在包级别上将"\a\n"声明为const值吗？还是与我如何构造要读取的字节有关的其他问题？
英文:
Creating a TCP server that needs to process some data. I have a net.Conn instance "connection"from which I will read said data. The lower part of the snippet brings about an error noting that it cannot use the 'esc' value as a byte value.
const(
esc = "\a\n"
)
....
c := bufio.NewReader(connection)
data, err := c.ReadBytes(esc)
Clearly, some conversion is needed but when I try
const(
esc = "\a\n"
)
....
c := bufio.NewReader(connection)
data, err := c.ReadBytes(byte(esc))
The compiler makes note that I cannot convert esc to byte. Is it due to the fact that I declared "\a\n" as a const value on the package level? Or is there something else overall associated with how I'm framing the bytes to be read?
答案1
得分: 1
你无法将esc转换为byte，因为你无法将字符串转换为单个字节。你可以将字符串转换为字节切片（[]byte）。
bufio.Reader仅支持单字节分隔符，如果要处理多字节分隔符，你应该使用带有自定义分割函数的bufio.Scanner。
也许可以修改 https://stackoverflow.com/a/37531472/1205448 的代码来实现。
英文:
You can't convert esc to byte because you can't convert strings into single bytes. You can convert a string into a byte slice ([]byte).
The bufio.Reader only supports single byte delimiters, you should use a bufio.Scanner with a custom split function instead for multi-byte delimiters.
Perhaps a modified version of https://stackoverflow.com/a/37531472/1205448
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