使用Clojure解析XML时如何保留注释？

I need a way to preserve comments when parsing xml from a file.

我需要一种方法来保存从文件解析xml时的注释。

I've tried clojure.xml/parse as well as a couple other really nice libs from github; they all work fine except that every one strips out the comments during parsing.

我已经尝试过clojure.xml / parse以及来自github的其他几个非常好的库;他们都工作正常,除了每个人在解析过程中删除注释。

Can anyone recommend a lib or perhaps a technique with clojure.xml that I'm not aware of?

任何人都可以推荐一个lib或者一个我不知道的clojure.xml技术吗?

1 个解决方案

#1

I ended up doing some preparsing on the xml string. Seems a bit hacky but it'll do for the moment.

我最终在xml字符串上做了一些预处理。看起来有点hacky但它​​现在会做。

(defn preparse-comments
  [s]
  (-> s
    (s/replace #"<!--" "<comment>")
    (s/replace #"-->" "</comment>")))

(defn revert-comments 
  [s]
  (-> s
    (s/replace #"<comment>" "<!--")
    (s/replace #"</comment>" "-->")))

(defn load-data
  [xml-filename]
  (-> xml-filename
    (slurp)
    (preparse-comments)
    (clojure.data.xml/parse-str)))

(defn emit-and-prep
  [data]
  (-> data
    (clojure.data.xml/emit-str)
    (revert-comments)))

Edit: the above is a pretty barebones approach; if you have tag-bracketing artifacts (e.g., /> and so on) in your comments, you'd have to appropriately account for them too somehow so that the preparsing does not render your xml invalid.

编辑:以上是一个非常准确的方法;如果你的评论中有标记包围工件(例如/>等等),你必须以某种方式对它们进行适当的考虑,以便预先制作不会使你的xml无效。