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From: Antoine Latter
Hi cafe,
I'd like to implement a toy-protocol and I'm looking for the sanest way (for me) to do so.
Here's what it looks like: The server receives, in that order: - Ascii string (4 bytes) - 16 bits int (2 bytes) - 8 bits int (1 byte) - UTF8 string (128 bytes)
I tried to use hGetBuf, but I don't know if it's the way to go and I did not understood what to do with the buf::Ptr a argument. I'm not very concerned about efficiency.
I don't know how I should convert my 16 and 8 bits int (read as Chars, I guess) to an Int. Is there something for that in the standard library?
I recommend reading the data in as one bytestring[1] (since you have a fixed length) and then parsing it using one of the many nice bytestring parsing libraries: * binary[2] * cereal[3] Others may have other suggestions. For the UTF8 parsing, I think the text[4] package has support for decoding UTF8 from a bytestring. Antoine [1] http://hackage.haskell.org/packages/archive/bytestring/0.9.1.7/doc/html/Data... [2] http://hackage.haskell.org/package/binary [3] http://hackage.haskell.org/package/cereal [4] http://hackage.haskell.org/package/text