练习一
Question
为每个片段添加唯一 id,并为 /snippets 添加一个 DELETE http 动词,以允许通过身份认证的用户删除自己的片段。
Answer
首先为每个片段添加唯一 id:
data class Snippet(val id: Int, val user: String, val text: String) val snippets = Collections.synchronizedList( mutableListOf( Snippet(id = 1, user = "test", text = "hello"), Snippet(id = 2, user = "test", text = "world") ) )
修改新增片段的post请求:
authenticate { post { val post = call.receive<PostSnippet>() val principal = call.principal<UserIdPrincipal>() ?: error("No principal") snippets += Snippet(snippets.size+1, principal.name, post.snippet.text) call.respond(mapOf("OK" to true)) } }
先测试新增片段的请求是否正常,ID正确
添加删除片段的delete请求:
authenticate { delete("/{id}") { val id = call.parameters["id"] val snip = snippets.find { s -> s.id == id?.toInt() } if (snip != null) { snippets.remove(snip) call.respond(mapOf("snippets" to synchronized(snippets) { snippets.toList() })) } else{ call.respond(mapOf("msg" to "no such id")) } } }
添加一个DELETE的HTTP请求测试
DELETE {{host}}/snippets/1 Authorization: Bearer {{auth_token}}
返回结果如下,id为1的snippets已被删除