An XSLT to output command line calls for curl to download photos from your tumblr blogs. because I tried a few libraries to do the same thing that failed abysmally.

tumblr2curl.xsl

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <!-- how to output depends on your processor, I used saxon Transform.exe   tumblrimages.xml -xsl tumblr2curl.xsl -o output2.txt 
       then I copied pasted output2.txt into the my shell. Could have written something to parse the format etc. and download at the same time
       but seemed overkill considering I would probably never use again. 
  -->
  <xsl:output method="text"/>

  <xsl:template match="post">
     <xsl:apply-templates select="photoset"/>
  </xsl:template>

  <xsl:template match="photoset">
    <xsl:apply-templates select="photo" />
  </xsl:template>

  <xsl:template match="photo">
    <!--this part of course only outputs the biggest image-->
    <xsl:variable name="photo" select="photo-url[1]"/>
    <xsl:text>./curl.exe --output </xsl:text><xsl:value-of select="ancestor::post/@slug"/>_<xsl:value-of select="@offset"/><xsl:value-of select="substring($photo, string-length($photo) - 3, 4)" /><xsl:text> </xsl:text><xsl:value-of select="$photo"/><xsl:text>&#xd;&#xa;</xsl:text>
  </xsl:template>

</xsl:stylesheet>