从base64内容写入二进制文件

时间:2017-06-26 11:29:07

标签: base64 xslt-2.0 xpath-2.0

我有base64编码内容(图像文件),我想使用XSLT / XPath 2.0将其写入外部文件。

这是我的输入文件

<root>
  <img>iVBORw0KGgoAAAANSUhEUgAABAAAAAMAAQMAAACAdIdOAAAABlBMVEUAAAD///
    +l2Z/dAAABpElEQVR42u3OQQ0AMAgEsHOAf7Wbhn0GIa2C5jSLgICAgICAgICAgI
    CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI
    CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgMDgQB6UgICAgICAgICAgICAgI
    CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI
    CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI
    CAgICAgICAgICAgICAgICAgICAgICAgMDKwB8CAgICAgICAgICAgICAgICAgICAg
    ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
    ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
    ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAu2BC6XQXOr9fnZDAAAAAElFTkSuQmCC</img>
</root>

这是我尝试编写文件:

<xsl:stylesheet version="2.0" 
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  xmlns:file="http://expath.org/ns/file">

  <xsl:template match="img">
    <myimg>
      <xsl:variable name="filename" select="'hello.png'"/>
      <xsl:attribute name="filename" select="$filename"/>
      <xsl:value-of select="file:write-binary($filename,xs:base64Binary(.))" />
    </myimg>
  </xsl:template>
</xsl:stylesheet> 

但&#34;没有任何反应&#34;,这意味着我得到一个带有myimg作为根​​标签(预期)的XML文件,但没有文件写入当前目录。我该怎么办?

我使用Saxon-PE-9.7.0.15和oXygen XML

编辑:使用hello.png作为文件名(以减少混淆)

1 个答案:

答案 0 :(得分:2)

这似乎与在oXygen中使用Saxon和EXPath文件模块有关,因为当我在Saxon外面运行XSLT时,文件是在与XML输入和样式表代码相同的目录中创建的,但是在oXygen里面使用<xsl:message select="'current-dir() ', file:current-dir()"/>表示文件模块使用不同的目录来读取和写入。