restful路由

gin的路由来自httprouter库。因此httprouter具有的功能，gin也具有，不过gin不支持路由正则表达式：

func
main
(){

router 
:= gin.
Default
()

    router.
GET
(
"/user/:name"
, func(c *gin.Context) {
        name := c.
Param
(
"name"
)
        c.
String
(http.StatusOK, 
"Hello %s"
, name)
    })
}

冒号:加上一个参数名组成路由参数。可以使用c.Params的方法读取其值。当然这个值是字串string。诸如/user/rsj217，和/user/hello都可以匹配，而/user/和/user/rsj217/不会被匹配。

☁  ~  curl http:
//127.0.0.1:8000/user/rsj217

Hello rsj217%                                                                 ☁  ~  curl http:
//127.0.0.1:8000/user/rsj217/
404
 page 
not
 found%                                                               ☁  ~  curl http:
//127.0.0.1:8000/user/
404
 page 
not
 found%

除了:，gin还提供了*号处理参数，*号能匹配的规则就更多。

func
main
(){

router 
:= gin.
Default
()

    router.
GET
(
"/user/:name/*action"
, func(c *gin.Context) {
        name := c.
Param
(
"name"
)
        action := c.
Param
(
"action"
)
        message := name + 
" is "
 + action
        c.
String
(http.StatusOK, message)
    })
}

访问效果如下

☁  ~  curl 
http:
/
/127.0.0.1:8000/user
/rsj217/

rsj217 is /%                                                                  ☁  ~  curl 
http:
/
/127.0.0.1:8000/user
/rsj217/
中国
rsj217 is /中国%