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Subject: Re: [boost] Is the async_read more reliable than async_read_some?
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2018-12-08 00:43:22


On 12/07/2018 05:05 PM, hh h wrote:
>> aynyc_read is essentially implemented by calling
>> async_read_some repeatedly, until it fills
>> the requested size.
> That is exactly the question I am going to ask, if you don't know the
> package size to read, you have to call sync_read_some with
> max_buffer_size, how does the sync_read_some function know the end of
> the message? Obviously, that the end of the message length is smaller
> than the max_buffer_size. Is some timeout defined in sync_read_some to
> identify the end of the message?

The way to identify the end of the message
depends on how the end of the message is
represented. If it uses some kind of
delimiter, then async_read_until will
work. If you signal the end of the message
by closing the connection, then you can
just read until EOF (which is indicated
by the error_code).

In Christ,
Steven Watanabe

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