在Python中我会做以下事情:
>>> q = urllib.urlencode({"q": "clojure url"})
>>> q
'q=clojure+url'
>>> url = "http://stackoverflow.com/search?" + q
>>> url
'http://stackoverflow.com/search?q=clojure+url'
如何在Clojure中完成上面为我完成的所有编码?换句话说,我该怎么做类似以下的事情:
=> (build-url "http://stackoverflow.com/search" {"q" "clojure url"})
"http://stackoverflow.com/search?q=clojure+url"
答案 0 :(得分:19)
Ring的url-encode
命名空间中有一个ring.util.codec
函数:
(ring.util.codec/url-encode "clojure url")
; => "clojure+url"
我不确定是否有预先打包的功能将地图转换为查询字符串,但也许这可以完成这项工作:
(use '[ring.util.codec :only [url-encode]])
(defn make-query-string [m]
(->> (for [[k v] m]
(str (url-encode k) "=" (url-encode v)))
(interpose "&")
(apply str)))
一个例子:
user> (make-query-string {"q" "clojure url" "foo" "bar"})
"q=clojure+url&foo=bar"
剩下的就是将结果连接到URL的末尾:
(defn build-url [url-base query-map]
(str url-base "?" (make-query-string query-map)))
似乎工作:
user> (build-url "http://stackoverflow.com/search" {"q" "clojure url"})
"http://stackoverflow.com/search?q=clojure+url"
更新
也许修改后的版本可能会带来更友好的Clojure体验。还通过一个Ring样式的可选参数处理编码,默认为utf-8。
(defn make-query-string [m & [encoding]]
(let [s #(if (instance? clojure.lang.Named %) (name %) %)
enc (or encoding "UTF-8")]
(->> (for [[k v] m]
(str (url-encode (s k) enc)
"="
(url-encode (str v) enc)))
(interpose "&")
(apply str))))
(defn build-url [url-base query-map & [encoding]]
(str url-base "?" (make-query-string query-map encoding)))
现在我们可以做到
user> (build-url "http://example.com/q" {:foo 1})
"http://example.com/q?foo=1"
答案 1 :(得分:12)
这是一种方式:
user=> (import [java.net URLEncoder])
java.net.URLEncoder
user=> (str "http://stackoverflow.com/search?q=" (URLEncoder/encode "clojure url" "UTF-8"))
"http://stackoverflow.com/search?q=clojure+url"
我知道这与你的Python片段不完全相同。请参阅Clojure邮件列表中的以下帖子以获得更完整的答案:
http://www.mail-archive.com/clojure@googlegroups.com/msg29338.html
来自那里的代码将允许您这样做:
user=> (encode-params {"q" "clojure url"})
"q=clojure+url"
答案 2 :(得分:11)
使用clj-http这是你的python会话的确切REPL等价物。
user=> (require ['clj-http.client :as 'client])
nil
user=> (str "http://stackoverflow.com/search?"
user=* (client/generate-query-string {"q" "clojure url"}))
"http://stackoverflow.com/search?q=clojure+url"
但clj-http让它更容易:
user=> (client/get "http://stackoverflow.com/search?"
user=* {:query-params {"q" "clojure url"}})
... <a lot of output, omitted to protect the innocent>...
假设您要执行GET请求,即。
答案 3 :(得分:2)
clj-apache-http非常有用。有了它,您可以执行以下操作:
user=> (require ['com.twinql.clojure.http :as 'http])
nil
user=> (def q (http/encode-query {"q" "clojure url"}))
#'user/q
user=> (def url (str "http://stackoverflow.com/search?" q))
#'user/url
user=> url
"http://stackoverflow.com/search?q=clojure+url"
答案 4 :(得分:0)
使用str(ings)的简单解决方案:
(def q (str "clojure+url"))
(def url (str "http://stackoverflow.com/search?" q))