August 5, 2019
By: 马海强
clojure luminus开发之handler里的参数获取
推荐阅读文档
- 后台基础框架luminus
- 后台sql支持HugSQL
- 后台web框架
- 前后端路由框架
- 前端状态管理框架
- 前端PC版UI框架-antizer
- clojure 函数定义及demo查询
- clojure编程风格指南
- spec guide
- 单元测试
在handle前后，可以用(keys request)查看request里自己传入的参数，那么在handler里怎么获取这些参数呢,在Luminus中定义了三种与springMVC类似的参数关键词，对应关系如下：
| mvc | request | luminus | 含义 |
|---|---|---|---|
| @RequestParam | query-params | parameters -> query | query参数，URL后面问号的参数，或form的参数 |
| @PathVariable | path-params | parameters -> path | path参数，URL中/的参数 |
| @RequestBody | body-params | parameters ->body | post/put方法里的body参数 |
这三个keyword是ring自身的处理，是原始request里的参数，但是query-params参数被处理成map的key不是keywords，是普通的string，得用(query-params "id")这样来取值。因此推荐如下示例使用： 推荐从request的parameters中获取，关键字分别是query，path， body。 获取的例子：
;;非推荐方式
;;api返回结果: {"data": "path params: {:id \"1\"}\n query params: {\"name\" \"2\"}\n body params: {:message \"22\"}"}
["/path/bad/:id"
{:post {:summary "路径上传参--不推荐此方法获取--query参数key变成了str"
:parameters {:path {:id int?}
:query {:name string?}
:body {:message string?}}
:handler (fn [{:keys [path-params query-params body-params]}]
{:status 200
:body {:data (str "path params: " path-params
"\n query params: " query-params
"\n body params: " body-params)}})}}]
;;good handler api返回结果:
#_{
"code": 1,
"message": "操作成功",
"data": "path params: {:id 1}, query params: {:name \"2\"}, body params: {:message \"22\"} "
}
["/path/good/:id"
{:post {:summary "路径上传参--GOOD--获取到3种map"
:parameters {:path {:id int?}
:query {:name string?}
:body {:message string?}}
:handler (fn [{{:keys [body query path]} :parameters}]
(ok (format "path params: %s, query params: %s, body params: %s " path query body)))}}]
;;good handler, 接口里三种参数都有，并且想直接获取map中key的vals
;; api返回结果:
#_{
"code": 1,
"message": "操作成功",
"data": "path params 'id': 1, query params 'name': 2 , body params: {:message \"22\"} "
}
["/path/good-all-params/:id"
{:post {:summary "路径上传参--GOOD--直接得到key的val"
:parameters {:path {:id int?}
:query {:name string?}
:body {:message string?}}
:handler (fn [{{:keys [body]} :parameters
{{:keys [id]} :path} :parameters
{{:keys [name]} :query} :parameters}]
(ok (format "path params 'id': %s, query params 'name': %s , body params: %s " id name body)))}}]
原因分析：我们在handler.clj的ring/router后面使用[reitit.ring.middleware.dev :as dev]的{:reitit.middleware/transform dev/print-request-diffs}方法打印出中间件的处理逻辑，
结果如下：
--- Middleware ---
{:body #<io.undertow.io.UndertowInputStream@39931c66>,
:character-encoding "ISO-8859-1",
:content-length 21,
:content-type "application/json",
:context "",
:cookies {"JSESSIONID" {:value "GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU"},
"_ga" {:value "GA1.1.521496834.1555489511"},
"_gid" {:value "GA1.1.947080805.1561170619"}},
:flash nil,
:form-params {},
:handler-type :undertow,
:headers {"accept" "application/json",
"accept-encoding" "gzip, deflate, br",
"accept-language" "zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7",
"connection" "keep-alive",
"content-length" "21",
"content-type" "application/json",
"cookie" "_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619",
"host" "localhost:3000",
"origin" "http://localhost:3000",
"referer" "http://localhost:3000/api/api-docs/index.html",
"user-agent" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"},
:multipart-params {},
:params {:name "2"},
:path-info "/api/guestbooks/path/good-all-params/1",
:path-params {:id "1"},
:query-params {"name" "2"},
:query-string "name=2",
:remote-addr "0:0:0:0:0:0:0:1",
:request-method :post,
:scheme :http,
:server-exchange #<io.undertow.server.HttpServerExchange@78f2e776 HttpServerExchange{ POST /api/guestbooks/path/good-all-params/1 request {Accept=[application/json], Accept-Language=[zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7], Accept-Encoding=[gzip, deflate, br], Origin=[http://localhost:3000], User-Agent=[Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36], Connection=[keep-alive], Content-Length=[21], Content-Type=[application/json], Cookie=[_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619], Referer=[http://localhost:3000/api/api-docs/index.html], Host=[localhost:3000]} response {Server=[undertow]}}>,
:server-name "localhost",
:server-port 3000,
:session nil,
:ssl-client-cert nil,
:uri "/api/guestbooks/path/good-all-params/1"}
--- Middleware :reitit.ring.middleware.parameters/parameters ---
{:body #<io.undertow.io.UndertowInputStream@39931c66>,
:character-encoding "ISO-8859-1",
:content-length 21,
:content-type "application/json",
:context "",
:cookies {"JSESSIONID" {:value "GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU"},
"_ga" {:value "GA1.1.521496834.1555489511"},
"_gid" {:value "GA1.1.947080805.1561170619"}},
:flash nil,
:form-params {},
:handler-type :undertow,
:headers {"accept" "application/json",
"accept-encoding" "gzip, deflate, br",
"accept-language" "zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7",
"connection" "keep-alive",
"content-length" "21",
"content-type" "application/json",
"cookie" "_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619",
"host" "localhost:3000",
"origin" "http://localhost:3000",
"referer" "http://localhost:3000/api/api-docs/index.html",
"user-agent" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"},
:multipart-params {},
:params {:name "2"},
:path-info "/api/guestbooks/path/good-all-params/1",
:path-params {:id "1"},
:query-params {"name" "2"},
:query-string "name=2",
:remote-addr "0:0:0:0:0:0:0:1",
:request-method :post,
:scheme :http,
:server-exchange #<io.undertow.server.HttpServerExchange@78f2e776 HttpServerExchange{ POST /api/guestbooks/path/good-all-params/1 request {Accept=[application/json], Accept-Language=[zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7], Accept-Encoding=[gzip, deflate, br], Origin=[http://localhost:3000], User-Agent=[Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36], Connection=[keep-alive], Content-Length=[21], Content-Type=[application/json], Cookie=[_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619], Referer=[http://localhost:3000/api/api-docs/index.html], Host=[localhost:3000]} response {Server=[undertow]}}>,
:server-name "localhost",
:server-port 3000,
:session nil,
:ssl-client-cert nil,
:uri "/api/guestbooks/path/good-all-params/1"}
--- Middleware :reitit.ring.middleware.muuntaja/format-negotiate ---
{:body #<io.undertow.io.UndertowInputStream@39931c66>,
:character-encoding "ISO-8859-1",
:content-length 21,
:content-type "application/json",
:context "",
:cookies {"JSESSIONID" {:value "GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU"},
"_ga" {:value "GA1.1.521496834.1555489511"},
"_gid" {:value "GA1.1.947080805.1561170619"}},
:flash nil,
:form-params {},
:handler-type :undertow,
:headers {"accept" "application/json",
"accept-encoding" "gzip, deflate, br",
"accept-language" "zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7",
"connection" "keep-alive",
"content-length" "21",
"content-type" "application/json",
"cookie" "_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619",
"host" "localhost:3000",
"origin" "http://localhost:3000",
"referer" "http://localhost:3000/api/api-docs/index.html",
"user-agent" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"},
:multipart-params {},
:params {:name "2"},
:path-info "/api/guestbooks/path/good-all-params/1",
:path-params {:id "1"},
:query-params {"name" "2"},
:query-string "name=2",
:remote-addr "0:0:0:0:0:0:0:1",
:request-method :post,
:scheme :http,
:server-exchange #<io.undertow.server.HttpServerExchange@78f2e776 HttpServerExchange{ POST /api/guestbooks/path/good-all-params/1 request {Accept=[application/json], Accept-Language=[zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7], Accept-Encoding=[gzip, deflate, br], Origin=[http://localhost:3000], User-Agent=[Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36], Connection=[keep-alive], Content-Length=[21], Content-Type=[application/json], Cookie=[_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619], Referer=[http://localhost:3000/api/api-docs/index.html], Host=[localhost:3000]} response {Server=[undertow]}}>,
:server-name "localhost",
:server-port 3000,
:session nil,
:ssl-client-cert nil,
:uri "/api/guestbooks/path/good-all-params/1",
+:muuntaja/request #muuntaja.core.FormatAndCharset
{:charset "utf-8",
:format "application/json",
:raw-format "application/json"},
+:muuntaja/response #muuntaja.core.FormatAndCharset
{:charset "utf-8",
:format "application/json",
:raw-format "application/json"}}
--- Middleware :reitit.ring.middleware.muuntaja/format-response ---
{:body #<io.undertow.io.UndertowInputStream@39931c66>,
:character-encoding "ISO-8859-1",
:content-length 21,
:content-type "application/json",
:context "",
:cookies {"JSESSIONID" {:value "GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU"},
"_ga" {:value "GA1.1.521496834.1555489511"},
"_gid" {:value "GA1.1.947080805.1561170619"}},
:flash nil,
:form-params {},
:handler-type :undertow,
:headers {"accept" "application/json",
"accept-encoding" "gzip, deflate, br",
"accept-language" "zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7",
"connection" "keep-alive",
"content-length" "21",
"content-type" "application/json",
"cookie" "_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619",
"host" "localhost:3000",
"origin" "http://localhost:3000",
"referer" "http://localhost:3000/api/api-docs/index.html",
"user-agent" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"},
:multipart-params {},
:params {:name "2"},
:path-info "/api/guestbooks/path/good-all-params/1",
:path-params {:id "1"},
:query-params {"name" "2"},
:query-string "name=2",
:remote-addr "0:0:0:0:0:0:0:1",
:request-method :post,
:scheme :http,
:server-exchange #<io.undertow.server.HttpServerExchange@78f2e776 HttpServerExchange{ POST /api/guestbooks/path/good-all-params/1 request {Accept=[application/json], Accept-Language=[zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7], Accept-Encoding=[gzip, deflate, br], Origin=[http://localhost:3000], User-Agent=[Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36], Connection=[keep-alive], Content-Length=[21], Content-Type=[application/json], Cookie=[_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619], Referer=[http://localhost:3000/api/api-docs/index.html], Host=[localhost:3000]} response {Server=[undertow]}}>,
:server-name "localhost",
:server-port 3000,
:session nil,
:ssl-client-cert nil,
:uri "/api/guestbooks/path/good-all-params/1",
:muuntaja/request {:charset "utf-8",
:format "application/json",
:raw-format "application/json"},
:muuntaja/response {:charset "utf-8",
:format "application/json",
:raw-format "application/json"}}
--- Middleware :reitit.ring.middleware.exception/exception ---
{:body #<io.undertow.io.UndertowInputStream@39931c66>,
:character-encoding "ISO-8859-1",
:content-length 21,
:content-type "application/json",
:context "",
:cookies {"JSESSIONID" {:value "GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU"},
"_ga" {:value "GA1.1.521496834.1555489511"},
"_gid" {:value "GA1.1.947080805.1561170619"}},
:flash nil,
:form-params {},
:handler-type :undertow,
:headers {"accept" "application/json",
"accept-encoding" "gzip, deflate, br",
"accept-language" "zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7",
"connection" "keep-alive",
"content-length" "21",
"content-type" "application/json",
"cookie" "_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619",
"host" "localhost:3000",
"origin" "http://localhost:3000",
"referer" "http://localhost:3000/api/api-docs/index.html",
"user-agent" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"},
:multipart-params {},
:params {:name "2"},
:path-info "/api/guestbooks/path/good-all-params/1",
:path-params {:id "1"},
:query-params {"name" "2"},
:query-string "name=2",
:remote-addr "0:0:0:0:0:0:0:1",
:request-method :post,
:scheme :http,
:server-exchange #<io.undertow.server.HttpServerExchange@78f2e776 HttpServerExchange{ POST /api/guestbooks/path/good-all-params/1 request {Accept=[application/json], Accept-Language=[zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7], Accept-Encoding=[gzip, deflate, br], Origin=[http://localhost:3000], User-Agent=[Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36], Connection=[keep-alive], Content-Length=[21], Content-Type=[application/json], Cookie=[_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619], Referer=[http://localhost:3000/api/api-docs/index.html], Host=[localhost:3000]} response {Server=[undertow]}}>,
:server-name "localhost",
:server-port 3000,
:session nil,
:ssl-client-cert nil,
:uri "/api/guestbooks/path/good-all-params/1",
:muuntaja/request {:charset "utf-8",
:format "application/json",
:raw-format "application/json"},
:muuntaja/response {:charset "utf-8",
:format "application/json",
:raw-format "application/json"}}
--- Middleware :reitit.ring.middleware.muuntaja/format-request ---
{:body #<io.undertow.io.UndertowInputStream@39931c66>,
:character-encoding "ISO-8859-1",
:content-length 21,
:content-type "application/json",
:context "",
:cookies {"JSESSIONID" {:value "GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU"},
"_ga" {:value "GA1.1.521496834.1555489511"},
"_gid" {:value "GA1.1.947080805.1561170619"}},
:flash nil,
:form-params {},
:handler-type :undertow,
:headers {"accept" "application/json",
"accept-encoding" "gzip, deflate, br",
"accept-language" "zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7",
"connection" "keep-alive",
"content-length" "21",
"content-type" "application/json",
"cookie" "_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619",
"host" "localhost:3000",
"origin" "http://localhost:3000",
"referer" "http://localhost:3000/api/api-docs/index.html",
"user-agent" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"},
:multipart-params {},
:params {:name "2"},
:path-info "/api/guestbooks/path/good-all-params/1",
:path-params {:id "1"},
:query-params {"name" "2"},
:query-string "name=2",
:remote-addr "0:0:0:0:0:0:0:1",
:request-method :post,
:scheme :http,
:server-exchange #<io.undertow.server.HttpServerExchange@78f2e776 HttpServerExchange{ POST /api/guestbooks/path/good-all-params/1 request {Accept=[application/json], Accept-Language=[zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7], Accept-Encoding=[gzip, deflate, br], Origin=[http://localhost:3000], User-Agent=[Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36], Connection=[keep-alive], Content-Length=[21], Content-Type=[application/json], Cookie=[_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619], Referer=[http://localhost:3000/api/api-docs/index.html], Host=[localhost:3000]} response {Server=[undertow]}}>,
:server-name "localhost",
:server-port 3000,
:session nil,
:ssl-client-cert nil,
:uri "/api/guestbooks/path/good-all-params/1",
:muuntaja/request {:charset "utf-8",
:format "application/json",
:raw-format "application/json"},
:muuntaja/response {:charset "utf-8",
:format "application/json",
:raw-format "application/json"},
+:body-params {:message "22"}}
--- Middleware :reitit.ring.coercion/coerce-request ---
{:body #<io.undertow.io.UndertowInputStream@39931c66>,
:body-params {:message "22"},
:character-encoding "ISO-8859-1",
:content-length 21,
:content-type "application/json",
:context "",
:cookies {"JSESSIONID" {:value "GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU"},
"_ga" {:value "GA1.1.521496834.1555489511"},
"_gid" {:value "GA1.1.947080805.1561170619"}},
:flash nil,
:form-params {},
:handler-type :undertow,
:headers {"accept" "application/json",
"accept-encoding" "gzip, deflate, br",
"accept-language" "zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7",
"connection" "keep-alive",
"content-length" "21",
"content-type" "application/json",
"cookie" "_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619",
"host" "localhost:3000",
"origin" "http://localhost:3000",
"referer" "http://localhost:3000/api/api-docs/index.html",
"user-agent" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"},
:multipart-params {},
:params {:name "2"},
:path-info "/api/guestbooks/path/good-all-params/1",
:path-params {:id "1"},
:query-params {"name" "2"},
:query-string "name=2",
:remote-addr "0:0:0:0:0:0:0:1",
:request-method :post,
:scheme :http,
:server-exchange #<io.undertow.server.HttpServerExchange@78f2e776 HttpServerExchange{ POST /api/guestbooks/path/good-all-params/1 request {Accept=[application/json], Accept-Language=[zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7], Accept-Encoding=[gzip, deflate, br], Origin=[http://localhost:3000], User-Agent=[Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36], Connection=[keep-alive], Content-Length=[21], Content-Type=[application/json], Cookie=[_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619], Referer=[http://localhost:3000/api/api-docs/index.html], Host=[localhost:3000]} response {Server=[undertow]}}>,
:server-name "localhost",
:server-port 3000,
:session nil,
:ssl-client-cert nil,
:uri "/api/guestbooks/path/good-all-params/1",
:muuntaja/request {:charset "utf-8",
:format "application/json",
:raw-format "application/json"},
:muuntaja/response {:charset "utf-8",
:format "application/json",
:raw-format "application/json"},
+:parameters {:body {:message "22"},
:path {:id 1},
:query {:name "2"}}}
2019-06-22 11:09:16,537 [XNIO-2 task-2] INFO alk-wxapi.middleware.log-interceptor -
================================ REQUEST START ================================
request-id:8ddb3169-e72f-4b90-8811-d500c50d3057
request-uri: /api/guestbooks/path/good-all-params/1
request-method: :post
request-query: {:name "2"}
request-body: {:message "22"}
--- Middleware ---
{:body #<io.undertow.io.UndertowInputStream@39931c66>,
:body-params {:message "22"},
:character-encoding "ISO-8859-1",
:content-length 21,
:content-type "application/json",
:context "",
:cookies {"JSESSIONID" {:value "GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU"},
"_ga" {:value "GA1.1.521496834.1555489511"},
"_gid" {:value "GA1.1.947080805.1561170619"}},
:flash nil,
:form-params {},
:handler-type :undertow,
:headers {"accept" "application/json",
"accept-encoding" "gzip, deflate, br",
"accept-language" "zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7",
"connection" "keep-alive",
"content-length" "21",
"content-type" "application/json",
"cookie" "_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619",
"host" "localhost:3000",
"origin" "http://localhost:3000",
"referer" "http://localhost:3000/api/api-docs/index.html",
"user-agent" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"},
:multipart-params {},
:parameters {:body {:message "22"},
:path {:id 1},
:query {:name "2"}},
:params {:name "2"},
:path-info "/api/guestbooks/path/good-all-params/1",
:path-params {:id "1"},
:query-params {"name" "2"},
:query-string "name=2",
:remote-addr "0:0:0:0:0:0:0:1",
:request-method :post,
:scheme :http,
:server-exchange #<io.undertow.server.HttpServerExchange@78f2e776 HttpServerExchange{ POST /api/guestbooks/path/good-all-params/1 request {Accept=[application/json], Accept-Language=[zh-CN,zh;q=0.9,zh-TW;q=0.8,en;q=0.7], Accept-Encoding=[gzip, deflate, br], Origin=[http://localhost:3000], User-Agent=[Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36], Connection=[keep-alive], Content-Length=[21], Content-Type=[application/json], Cookie=[_ga=GA1.1.521496834.1555489511; JSESSIONID=GpSiQENkmzM7qQwqWdYxjehYKvNKoEGMG6MIwqwU; _gid=GA1.1.947080805.1561170619], Referer=[http://localhost:3000/api/api-docs/index.html], Host=[localhost:3000]} response {Server=[undertow]}}>,
:server-name "localhost",
:server-port 3000,
:session nil,
:ssl-client-cert nil,
:uri "/api/guestbooks/path/good-all-params/1",
:muuntaja/request {:charset "utf-8",
:format "application/json",
:raw-format "application/json"},
:muuntaja/response {:charset "utf-8",
:format "application/json",
:raw-format "application/json"}}
可以看到在reitit.ring.coercion/coerce-request中间件处理后request里增加了
:parameters { :body {:message "22"}, :path {:id 1}, :query {:name "2"}}
3种类型一致的map，这就是我们为什么推荐使用的原因。
handler里获取request自定义的对象：
那么，在上一步handle中加入到request中了一个current-user怎么获取和使用呢？其实，body-params，query-params这些也只是从request中获取到的而已，既然能从request中获取这些，那么request里的其他所有自然也能在handler中获取，看下面的例子：
["/reset/pwd"
{:post {:summary "修改密码"
:parameters {:body (s/keys :req-un [::old-pwd ::new-pwd])}
:handler (fn [{{{:keys [old-pwd new-pwd]} :body} :parameters :as request}]
(let [current-id (-> request :current-user :user-id)
db-user (db/get-user-id
{:user-id current-id})]
(if (check-old-pwd old-pwd (:password db-user))
(do (conman.core/with-transaction
[*db*]
(db/update-pwd! {:password (d/sha-256 new-pwd)
:user-id current-id}))
{:status 200
:body {:code 1
:message "修改成功，请用新密码登录"}})
{:status 400
:body {:code 0
:message "密码错误，请输入正确的密码！"}})))}}]
:as request的意思是包含前面指定获取的参数的所有。
当然，如你所知，clojure确实足够灵活，取参方式也还有方式，比如
["/path/good-all-params/:id"
{:post {:summary "更多方式"
:parameters {:path {:id int?}
:query {:name string?}
:body {:message string?}}
:handler (fn [{{data :body} :parameters
{{:keys [id]} :path} :parameters]
(ok (format " body params: %s " data)))}}]
这里参数名称data可以定义成任何你想叫的名字。