<p><a class="user-mention" data-hovercard-type="user" data-hovercard-url="/hovercards?user_id=5842757" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/mmd-osm">@mmd-osm</a> yes so there is a special case of a special case in which re-trying automatically is legit from the RFC pov (but obviously as it breaks the POST semantics, actually doing so is clearly broken too).</p>
<p>If we are so concerned about this specific scenario , then obviously the far simpler solution to the whole issue is to generate a checksum with a suitable method and return an error to the application in question if the repeated upload matches, because while you might get the JOSM devs to use a indempotent-token-whatever your random web browser based application out there is not going to do so.</p>

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