Iwasaki Yudai abe3f5c89f Don't send invalid UTF-8 string ...

When a rune stands over the buffer boundary, invalid UTF-8 bytes were
sent to the client. Now the logic checks if the tail of the buffer can
be decoded as a valid rune. When it's an invalid byte sequence, the logic
keeps it in the buffer and send it in the next loop with the following byte sequence.

2015-08-16 19:07:02 -07:00

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