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1 file changed, 22 insertions
blahblah.clj(file created)
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| 1 | + | (defn ^String modify-link | |
| 2 | + | "Takes a DOM tree `document` and a Ring request map `request` as arguments. | |
| 3 | + | This function will modify the links in <link> tags of <item> elements to point | |
| 4 | + | to our download proxy. Returns the modified document as a String." | |
| 5 | + | [document request] | |
| 6 | + | (let [dom (parse-xml document) | |
| 7 | + | tfn (doto (make-transformer) | |
| 8 | + | (.setOutputProperty OutputKeys/INDENT "yes") | |
| 9 | + | (.setOutputProperty "{http://xml.apache.org/xslt}indent-amount" "2")) | |
| 10 | + | src (DOMSource. dom) | |
| 11 | + | dst (StreamResult. (StringWriter.))] | |
| 12 | + | ;; Modify all <link> tag whose child is <item> | |
| 13 | + | (->> dom | |
| 14 | + | (get-tags "link") | |
| 15 | + | (filter in-<item>?) | |
| 16 | + | (run! (fn [tag] | |
| 17 | + | (let [id (get-id (tag-text tag)) | |
| 18 | + | resource (absolute-url request id)] | |
| 19 | + | (set-tag-text! tag resource))))) | |
| 20 | + | ;; Return the transformed feed | |
| 21 | + | (.transform tfn src dst) | |
| 22 | + | (.toString (.getWriter dst)))) | |
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