I'm trying to read a number of Bytes from a socket in Haskell. Bascially I want to do something equivalent to this:
我正在尝试从Haskell中的套接字读取一些字节。基本上我想做一些与此相当的事情：
client_socket.recv(255) #(Python)
What's the best way of doing it?
这样做的最佳方法是什么？
2 个解决方案
#1
13
There's Network.Socket, which has recvFrom and recvBufFrom. The first one assumes you want a String, which you certainly don't want if you want binary data. The second one uses a pointer, which you probably don't want to deal with. There's also socketToHandle, which is very useful.
有Network.Socket，它有recvFrom和recvBufFrom。第一个假定你想要一个String，如果你想要二进制数据，你肯定不想要它。第二个使用指针，您可能不想处理它。还有socketToHandle，这非常有用。
However, my recommendation is the network-bytestring library. It supports both lazy and strict bytestrings. http://hackage.haskell.org/package/network-bytestring
但是，我的建议是network-bytestring库。它支持惰性和严格的字节串。 http://hackage.haskell.org/package/network-bytestring
#2
2
For this kind of beginner questions, it's not a bad idea to check out RWH first.
对于这种初学者问题，首先查看RWH并不是一个坏主意。
And as a general rule of thumb, you should always look at Hackage for libraries and documentation. To search for a function, Hayoo and Hoogle are your friends.
作为一般的经验法则，您应该始终查看Hackage的库和文档。要搜索某个功能，Hayoo和Hoogle是您的朋友。
#1
13
There's Network.Socket, which has recvFrom and recvBufFrom. The first one assumes you want a String, which you certainly don't want if you want binary data. The second one uses a pointer, which you probably don't want to deal with. There's also socketToHandle, which is very useful.
有Network.Socket，它有recvFrom和recvBufFrom。第一个假定你想要一个String，如果你想要二进制数据，你肯定不想要它。第二个使用指针，您可能不想处理它。还有socketToHandle，这非常有用。
However, my recommendation is the network-bytestring library. It supports both lazy and strict bytestrings. http://hackage.haskell.org/package/network-bytestring
但是，我的建议是network-bytestring库。它支持惰性和严格的字节串。 http://hackage.haskell.org/package/network-bytestring
#2
2
For this kind of beginner questions, it's not a bad idea to check out RWH first.
对于这种初学者问题，首先查看RWH并不是一个坏主意。
And as a general rule of thumb, you should always look at Hackage for libraries and documentation. To search for a function, Hayoo and Hoogle are your friends.
作为一般的经验法则，您应该始终查看Hackage的库和文档。要搜索某个功能，Hayoo和Hoogle是您的朋友。