All of the source is there... but in general it is a bit more complex under the
covers than most - as it uses select/poll to know when a socket is ready for IO
then schedules the routine in the Read() to perform the IO. So Go has a bit of
its own kernel code than you would see in typical synchronous C socket code.
Ultimately Read() becomes a standard read() on the socket descriptor.
> On Dec 31, 2019, at 10:03 AM, Ron Wahler <ron.wah...@gmail.com> wrote:
>
>
> \\One other note, if you have a request / response type protocol with fairly
> defined lengths, you don’t need a buffer larger than the largest message if
> you don’t allow concurrent requests from the same client.
>
> Yes, understood, that was not the constraint, I have to process an unknown
> amount of bytes, so I have been just trying to make sure I had the best
> solution.
>
> I would still like to read the underlying GoLang code on Read() to see what
> assumptions it makes to the system calls.
>
> thanks,
> Ron
>
>> On Friday, December 27, 2019 at 5:11:42 PM UTC-7, Ron Wahler wrote:
>> I am looking for a net.conn standard read that would return a data buffer
>> the exact size of the read. I am trying to read an unknown amount of byte
>> data from the connection. With the read i am using I am required to
>> pre-allocate a buffer and pass that buffer to the read. I am looking for a
>> read that works more like the ReadString , but is for a byte slice.
>>
>> // I want something similar to this read that returns the read string into
>> the message string.
>> message, err := bufio.NewReader(ServerConn).ReadString('\n')
>>
>> if ( err != nil ){
>>
>> fmt.Println("RELAY: ERROR: Reg Message read err:",
>> err)
>>
>> return
>>
>> }
>>
>>
>>
>>
>>
>> // had to preallocate a buffer, but I want a read to return me a buffer so I
>> don't have to guess how big to make it.
>>
>> buf := make([]byte, 1024*32)
>>
>> // READ FROM CLIENT
>>
>> nBytes, err := Csrc.Read(buf)
>>
>>
>>
>>
>>
>> Is this not possible, I have not seen any examples that would indicate that
>> there is a standard library that would do something like what I am looking
>> for.
>>
>>
>>
>> thanks,
>>
>> Ron
>>
>
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