fix(authz-keycloak): add missing path for access_denied_redirect_uri (a…

…pache#6794)

apisix/plugins/authz-keycloak.lua

@@ -666,6 +666,11 @@ local function evaluate_permissions(conf, ctx, token)
     if res.status == 403 then
         -- Request permanently denied, e.g. due to lacking permissions.
         log.debug('Request denied: HTTP 403 Forbidden. Body: ', res.body)
+        if conf.access_denied_redirect_uri then
+            core.response.set_header("Location", conf.access_denied_redirect_uri)
+            return 307
+        end
+
         return res.status, res.body
     elseif res.status == 401 then
         -- Request temporarily denied, e.g access token not valid.

t/plugin/authz-keycloak3.t

@@ -0,0 +1,108 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+use t::APISIX 'no_plan';
+
+add_block_preprocessor(sub {
+    my ($block) = @_;
+
+    if (!$block->request) {
+        $block->set_value("request", "GET /t");
+    }
+
+    if (!$block->error_log && !$block->no_error_log) {
+        $block->set_value("no_error_log", "[error]\n[alert]");
+    }
+});
+
+run_tests;
+
+__DATA__
+
+=== TEST 1: access_denied_redirect_uri works with request denied in token_endpoint
+--- config
+    location /t {
+        content_by_lua_block {
+            local t = require("lib.test_admin").test
+            local code, body = t('/apisix/admin/routes/1',
+                 ngx.HTTP_PUT,
+                 [[{
+                        "plugins": {
+                            "authz-keycloak": {
+                                "token_endpoint": "http://127.0.0.1:8090/auth/realms/University/protocol/openid-connect/token",
+                                "access_denied_redirect_uri": "http://127.0.0.1/test",
+                                "permissions": ["course_resource#delete"],
+                                "client_id": "course_management",
+                                "grant_type": "urn:ietf:params:oauth:grant-type:uma-ticket",
+                                "timeout": 3000
+                            }
+                        },
+                        "upstream": {
+                            "nodes": {
+                                "127.0.0.1:1982": 1
+                            },
+                            "type": "roundrobin"
+                        },
+                        "uri": "/hello1"
+                }]]
+                )
+
+            if code >= 300 then
+                ngx.status = code
+            end
+            ngx.say(body)
+        }
+    }
+--- response_body
+passed
+
+
+
+=== TEST 2: hit
+--- config
+    location /t {
+        content_by_lua_block {
+            local json_decode = require("toolkit.json").decode
+            local http = require "resty.http"
+            local httpc = http.new()
+            local uri = "http://127.0.0.1:8090/auth/realms/University/protocol/openid-connect/token"
+            local res, err = httpc:request_uri(uri, {
+                    method = "POST",
+                    body = "grant_type=password&client_id=course_management&client_secret=d1ec69e9-55d2-4109-a3ea-befa071579d5&username=student@gmail.com&password=123456",
+                    headers = {
+                        ["Content-Type"] = "application/x-www-form-urlencoded"
+                    }
+                })
+
+            if res.status == 200 then
+                local body = json_decode(res.body)
+                local accessToken = body["access_token"]
+                uri = "http://127.0.0.1:" .. ngx.var.server_port .. "/hello1"
+                local res, err = httpc:request_uri(uri, {
+                    method = "GET",
+                    headers = {
+                        ["Authorization"] = "Bearer " .. accessToken,
+                    }
+                 })
+
+                 ngx.status = res.status
+                 ngx.header["Location"] = res.headers["Location"]
+            end
+        }
+    }
+--- error_code: 307
+--- response_headers
+Location: http://127.0.0.1/test