使用xslt构建django模板文件 [英] building django template files with xslt

问题描述

我有大约4,000个html文档，我试图使用xslt转换成django模板。我遇到的问题是，当我尝试在属性标签内部包含模板变量时，xslt会转义模板变量的{花括号;
我的xslt文件如下所示：

 < xsl：template match =p> 
< p> 
< xsl：attribute name =nid>< xsl：value-of select =$ node_id/>< / xsl：attribute> 
< xsl：apply-templates select =* | node（）/> 
< / p> 
< span> 
 {％get_comment_count for thing'< xsl：value-of select =$ node_id/>'as node_count％} 
< a href => {{node_count}}< ; / A> //这样工作正常
< / span> 
< div> 
< xsl：attribute name =class> HControl< / xsl：attribute> 
< xsl：text disable-output-escaping =yes> {％if node_count> 0％}< / xsl：text> //因为'>'
< div class =comment-list> 
 {％get_comment_list for thing'< xsl：value-of select =$ node_id/>'as node_comments％} 
 {％在node_comments％中的评论} 
< div class =comment {{comment.object_id}}> //这得到转义
< a> 
< xsl：attribute name =name> c {{comment.id}}< / xsl：attribute> //这样
< / a> 
< a> 
< xsl：attribute name =href> 
 {％get_comment_permalink comment％} 
< / xsl：attribute> 
 permalink for comment＃{{forloop.counter}} 
< / a> 
< div> 
 {{comment.comment}} 
< / div> 
< / div> 
 {％endfor％} 
< / div> 
 {％endif％} 
< / div> 
  

输出看起来像这样：

 < div> 
< p nid =50：1r：SB：1101S：5> 
< span class =Insert> B。违反本节的人有1级轻罪。< / span> 
< / p> 
< span> 
< a href => 1< / a> 
< / span> 
< div class =HControl> 
< div class =comment-list> 
< div class =comment'{comment.object_id}'> //这应该是class =comment＃c123
< a name =c％7B％7B％20comment.id％20％7D％7D>< / a> // this should name =c123
< a href =％7B %% 20get_comment_permalink％20comment％20 %% 7D> //这应该是一个href的评论
 permalink的评论＃1 
< / a> 
< div> 
那么你应该表现出一些尊重！ 
< / div> 
< / div> 
< / div> 
< / div> 
  

我用lxml转换文件.etree然后将该字符串传递给django模板对象，并将其渲染。
我似乎不明白如何让xslt解析器单独留下花括号

解决方案

XSLT有自己的大括号的目的 - 它们用于属性值模板，如这个：

 <！ -  $ someVariableOrExpression将在这里进行评估 - > 
< div title ={$ someVariableOrExpression}/> 
  

要在XSLT中将文字大括号转换为属性值，您需要逃避他们，这是通过加倍来完成的：

 <！ - 标题将是{$ someVariableOrExpression} - > 
< div title ={{$ someVariableOrExpression}}/> 
  

所以如果你想输出文字双重花括号，你需要猜测什么）：

 < div title ={{{$ someVariableOrExpression}}}}/> 
  

I have about 4,000 html documents that i am trying to convert into django templates using xslt. The problem that I am having is that xslt is escaping the '{' curly braces for template variables, when I try to include a template variable inside of an attribute tag; my xslt file looks like this:

<xsl:template match="p">
    <p>
        <xsl:attribute name="nid"><xsl:value-of select="$node_id"/></xsl:attribute>
        <xsl:apply-templates select="*|node()"/>
    </p>
    <span>
        {% get_comment_count for thing '<xsl:value-of select="$node_id"/>' as node_count %}
        <a href="">{{ node_count }}</a> //This works as expected
    </span>
    <div>
        <xsl:attribute name="class">HControl</xsl:attribute>
        <xsl:text disable-output-escaping="yes">{% if node_count > 0 %}</xsl:text> // have to escape this because of the '>'
        <div class="comment-list">
            {% get_comment_list for thing '<xsl:value-of select="$node_id"/>' as node_comments %}
            {% for comment in node_comments %}
            <div class="comment {{ comment.object_id }}"> // this gets escaped
                <a>
                <xsl:attribute name="name">c{{ comment.id }}</xsl:attribute> //and so does this
                </a>
                <a>
                <xsl:attribute name="href">
                {% get_comment_permalink comment %}
                </xsl:attribute>
                permalink for comment #{{ forloop.counter }}
                </a>
                <div>
                {{ comment.comment }}
                </div>
            </div>
            {% endfor %}
        </div>
        {% endif %}
    </div>

the output looks something like this:

<div>
<p nid="50:1r:SB:1101S:5">
    <span class="Insert">B.  A person who violates this section is guilty of a class 1 misdemeanor.</span>
</p>
<span>
    <a href="">1</a>
</span>
<div class="HControl">
    <div class="comment-list">
        <div class="comment '{ comment.object_id }'"> // this should be class="comment #c123"
            <a name="c%7B%7B%20comment.id%20%7D%7D"></a> // this should name="c123"
            <a href="%7B%%20get_comment_permalink%20comment%20%%7D"> //this should be an href to the comment
                permalink for comment #1
            </a>
            <div>
                Well you should show some respect!
            </div>
        </div>
    </div>
</div>

I transform the file with lxml.etree and then pass the string to a django template object, and render it. I just dont seem to understand how to get the xslt parser to leave the curly braces alone

解决方案

XSLT has its own purpose for curly braces - they are used in Attribute Value Templates, like this:

<!-- $someVariableOrExpression will be evaluated here -->
<div title="{$someVariableOrExpression}" />

To get literal curly braces into attribute values in XSLT, you need to escape them, which is done by doubling them:

<!-- the title will be "{$someVariableOrExpression}" here -->
<div title="{{$someVariableOrExpression}}" />

So if you want to output literal double curly braces, you need (guess what):

<div title="{{{{$someVariableOrExpression}}}}" />

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