Re: [protobuf] How to serialize empty message in protobuf-3 in C++?

[Ivan Baidakou]

Thanks a lot, it helped greatly!

On Saturday, February 6, 2021 at 1:12:44 AM UTC+3 thes...@gmail.com wrote:

> Over the network, you could send the size of the message (which may be 
> zero) and then the message itself. See the example on this page 
> 
>  and 
> steaming multiple messages 
> 
> . 
>
> On Fri, Feb 5, 2021 at 1:26 PM Ivan Baidakou  wrote:
>
>> Hi Nadav,
>>
>> I have to send the message over the network. If it returns the empty 
>> string, there is nothing to send. Anyway, I can see, that the remote side 
>> somehow sends (empty) Pings to me. How I can do the same?
>>
>>
>> On Saturday, February 6, 2021 at 12:05:39 AM UTC+3 thes...@gmail.com 
>> wrote:
>>
>>> Hi Ivan,
>>>
>>> You are doing it correctly. An empty message has zero length when 
>>> serialized. This is also true for messages with only optional fields - an 
>>> empty array of bytes is a valid serialized instance of such a message.
>>>
>>> -Nadav
>>>
>>> On Fri, Feb 5, 2021 at 12:57 PM Ivan Baidakou  wrote:
>>>

 Hi,

 There is a the following message type:

 message Ping {}

 When I invoke for my  object  "proto::Ping " the ping.ByteSizeLong() 
 it returns zero. ping.SerializeAsString() also returns empty string. 

 What can be done?

 Thank you, 
 wbr, basiliscos

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 .

>>>
>>>
>>> -- 
>>> -Nadav
>>>
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> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/protobuf/4990bfa4-20a8-445b-b402-fbb134cde708n%40googlegroups.com
>>  
>> 
>> .
>>
>
>
> -- 
> -Nadav
>

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Re: [protobuf] How to serialize empty message in protobuf-3 in C++?

[Nadav Samet]

Over the network, you could send the size of the message (which may be
zero) and then the message itself. See the example on this page

and
steaming multiple messages
.

On Fri, Feb 5, 2021 at 1:26 PM Ivan Baidakou  wrote:

> Hi Nadav,
>
> I have to send the message over the network. If it returns the empty
> string, there is nothing to send. Anyway, I can see, that the remote side
> somehow sends (empty) Pings to me. How I can do the same?
>
>
> On Saturday, February 6, 2021 at 12:05:39 AM UTC+3 thes...@gmail.com
> wrote:
>
>> Hi Ivan,
>>
>> You are doing it correctly. An empty message has zero length when
>> serialized. This is also true for messages with only optional fields - an
>> empty array of bytes is a valid serialized instance of such a message.
>>
>> -Nadav
>>
>> On Fri, Feb 5, 2021 at 12:57 PM Ivan Baidakou  wrote:
>>
>>>
>>> Hi,
>>>
>>> There is a the following message type:
>>>
>>> message Ping {}
>>>
>>> When I invoke for my  object  "proto::Ping " the ping.ByteSizeLong()
>>> it returns zero. ping.SerializeAsString() also returns empty string.
>>>
>>> What can be done?
>>>
>>> Thank you,
>>> wbr, basiliscos
>>>
>>> --
>>> You received this message because you are subscribed to the Google
>>> Groups "Protocol Buffers" group.
>>> To unsubscribe from this group and stop receiving emails from it, send
>>> an email to protobuf+u...@googlegroups.com.
>>> To view this discussion on the web visit
>>> https://groups.google.com/d/msgid/protobuf/c5cfa7ca-bd7f-47b5-a993-0427b0e04d06n%40googlegroups.com
>>> 
>>> .
>>>
>>
>>
>> --
>> -Nadav
>>
> --
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> To view this discussion on the web visit
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> 
> .
>


-- 
-Nadav

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Re: [protobuf] How to serialize empty message in protobuf-3 in C++?

[Ivan Baidakou]

Hi Nadav,

I have to send the message over the network. If it returns the empty 
string, there is nothing to send. Anyway, I can see, that the remote side 
somehow sends (empty) Pings to me. How I can do the same?


On Saturday, February 6, 2021 at 12:05:39 AM UTC+3 thes...@gmail.com wrote:

> Hi Ivan,
>
> You are doing it correctly. An empty message has zero length when 
> serialized. This is also true for messages with only optional fields - an 
> empty array of bytes is a valid serialized instance of such a message.
>
> -Nadav
>
> On Fri, Feb 5, 2021 at 12:57 PM Ivan Baidakou  wrote:
>
>>
>> Hi,
>>
>> There is a the following message type:
>>
>> message Ping {}
>>
>> When I invoke for my  object  "proto::Ping " the ping.ByteSizeLong() 
>> it returns zero. ping.SerializeAsString() also returns empty string. 
>>
>> What can be done?
>>
>> Thank you, 
>> wbr, basiliscos
>>
>> -- 
>> You received this message because you are subscribed to the Google Groups 
>> "Protocol Buffers" group.
>> To unsubscribe from this group and stop receiving emails from it, send an 
>> email to protobuf+u...@googlegroups.com.
>> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/protobuf/c5cfa7ca-bd7f-47b5-a993-0427b0e04d06n%40googlegroups.com
>>  
>> 
>> .
>>
>
>
> -- 
> -Nadav
>

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Re: [protobuf] How to serialize empty message in protobuf-3 in C++?

[Nadav Samet]

Hi Ivan,

You are doing it correctly. An empty message has zero length when
serialized. This is also true for messages with only optional fields - an
empty array of bytes is a valid serialized instance of such a message.

-Nadav

On Fri, Feb 5, 2021 at 12:57 PM Ivan Baidakou  wrote:

>
> Hi,
>
> There is a the following message type:
>
> message Ping {}
>
> When I invoke for my  object  "proto::Ping " the ping.ByteSizeLong()
> it returns zero. ping.SerializeAsString() also returns empty string.
>
> What can be done?
>
> Thank you,
> wbr, basiliscos
>
> --
> You received this message because you are subscribed to the Google Groups
> "Protocol Buffers" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to protobuf+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/protobuf/c5cfa7ca-bd7f-47b5-a993-0427b0e04d06n%40googlegroups.com
> 
> .
>


-- 
-Nadav

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