<rewrite>
<rules>
<rule name="Append Basic Authentication" patternSyntax="Wildcard" stopProcessing="true">
<match url="*" />
<conditions>
<add input="{REQUEST_METHOD}" pattern="PUT" />
</conditions>
<serverVariables>
<set name="HTTP_Authorization" value="Basic Z3JlZ29yeTpncmVnb3J5" replace="false" />
</serverVariables>
<action type="None" />
</rule>
</rules>
</rewrite>