Concept for analyze several XML messages, sometimes incomplete.

RobertSommer

Hello,
I receive xml messages and need to analyze them. The messages may be incomplete.

What is the best way to solve this?
MessageToAnalysis += IncomingData;
if start and end tag are present, start analysis. During the analysis, data can arrive again as a substring.

Maybe loke this IncomingData.split("/ROOT>") ?
It could be that I am receiving </Ro
a little later </ot>

Or I receive two messages at the same time?
Analyze first message, then second message

<ROOT info="Partial receipt of messages">
	<START_REQ task="1" program="0178"  />
</ROOT>


<ROOT info="Partial receipt of messages">
	<START_REQ task="2" program="0178"  />
</ROOT>


/////////////////

Part one
<ROOT info="Partial receipt of messa

Part two
ges">
	<START_REQ task="2" program="0178"  />
</ROOT>

///////////////////

Part one
<ROOT info="Partial receipt of messa

Part two

ges">
	<START_REQ task="3" program="0178"  />
</ROOT><ROOT in

Thanks in advance.
Best regards Robert

SGaist

Hi,

Sounds like:

cumulate the data in a buffer until you have a full message
extract the message from the buffer
process message

That way you can continue to fill the buffer while the processing is being done.
Rince and repeat

RobertSommer

@SGaist said in Concept for analyze several XML messages, sometimes incomplete.:

cumulate the data in a buffer until you have a full message

extract the message from the buffer

OK, Do you have a good sample?

RobertSommer

@RobertSommer
Yes, it would be a ring buffer, it is also possible that no XML data is coming, then ignore it. How can I solve this? With example. THANKS.

<ROOT info="Partial receipt of messages"> <START_REQ task="1" program="0178"  /> </ROOT> 

<ROOT info="Partial receipt of messages"> <START_REQ task="1" program="0178"  /> </ROOT>  000000 <ROOT info="Partial receipt of messages"> <START_REQ task="2" program="0178"  /> </ROOT> 

<ROOT info="Partial receipt of messages"> <START_REQ task="1" program="0178"  /> 00000000 </ROOT>  000000 <ROOT info="Partial receipt of messages"> <START_REQ task="2" program="0178"  /> </ROOT> 

artial receipt of messages"> <START_REQ task="1" program="0178"  /> **00000000** </ROOT>  XXXX000000 <ROOT info="Partial receipt of messages"> <START_REQ task="2" program="0178"  /> </ROOT> <ROOT info="P

JonB

@RobertSommer said in Concept for analyze several XML messages, sometimes incomplete.:

it is also possible that no XML data is coming, then ignore it. How can I solve this?

What exactly do you mean by this? If no data comes then you won't receive any data and won't have anything to parse. Do not do a blocking read if you have to wait for data, use a readyRead() signal.

RobertSommer

@JonB said in Concept for analyze several XML messages, sometimes incomplete.:

What exactly do you mean by this?

I send and receive XML messages via socket, which I have to evaluate. There may be 0000 between the messages, other characters that are not necessary for XML. Presumably buffer with 000

The idea is to read <Root> XXXXXX </Root>.

It may be that two messages come at once, too fast.

How can I solve this? RingBuffer? Do you have a good example of how to solve this?