Hi all,

I usually read in this forum that web services and SOAP are not appropriate for large data transmission, but I have never read about any good technical reasons behind these sentences.

Most of the issues I have seen in this matter are related to the SOAP stack implementation, rather than to SOAP itself:

- Progress bar for file download: You can split the download in smaller chunks and transmit them using several calls. It should be possible to modify the attachments implementation of SOAP and add the logic for asynchronous status notification, so it is technically possible to track the progress of attachments download/upload.

- SOAP XML overhead: In fact, the overhead of a SOAP envelope containing just a reference to the attachment part is more important for small attachments than for large ones. Just one or two kilobytes of XML are not too much when you are trying to transfer an 8GB stream.

- Partial/broken transmissions: Again, if the attachments implementation is able to track the progress of a download, it may be possible to resume it after a transmission error. We would just need to be able to specify the range we are interested in, just like with old plain HTML.


Could somebody shed some light on the reasons that make SOAP inappropriate for this task?

Regards,
Rodrigo Ruiz

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