| -- Copyright (c) 2016 IBM. All rights reserved. |
| -- |
| -- Permission is hereby granted, free of charge, to any person obtaining a |
| -- copy of this software and associated documentation files (the "Software"), |
| -- to deal in the Software without restriction, including without limitation |
| -- the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| -- and/or sell copies of the Software, and to permit persons to whom the |
| -- Software is furnished to do so, subject to the following conditions: |
| -- |
| -- The above copyright notice and this permission notice shall be included in |
| -- all copies or substantial portions of the Software. |
| -- |
| -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| -- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| -- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| -- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| -- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| -- FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| -- DEALINGS IN THE SOFTWARE. |
| |
| --- @module tenants |
| -- Management interface for tenants for the gateway |
| |
| local cjson = require "cjson" |
| local redis = require "lib/redis" |
| local utils = require "lib/utils" |
| local request = require "lib/request" |
| local REDIS_HOST = os.getenv("REDIS_HOST") |
| local REDIS_PORT = os.getenv("REDIS_PORT") |
| local REDIS_PASS = os.getenv("REDIS_PASS") |
| |
| local _M = {}; |
| |
| --- Request handler for routing tenant calls appropriately |
| function _M.requestHandler() |
| local requestMethod = ngx.req.get_method() |
| if requestMethod == "GET" then |
| getTenants() |
| elseif requestMethod == "PUT" then |
| addTenant() |
| elseif requestMethod == "POST" then |
| addTenant() |
| elseif requestMethod == "DELETE" then |
| deleteTenant() |
| else |
| ngx.status = 400 |
| ngx.say("Invalid verb") |
| end |
| end |
| |
| --- Add a tenant to the Gateway |
| -- PUT /v1/tenants |
| -- body: |
| -- { |
| -- "namespace": *(String) tenant namespace |
| -- "instance": *(String) tenant instance |
| -- } |
| function addTenant() |
| -- Open connection to redis or use one from connection pool |
| local red = redis.init(REDIS_HOST, REDIS_PORT, REDIS_PASS, 10000) |
| -- Check for tenant id and use existingTenant if it already exists in redis |
| local existingTenant = checkForExistingTenant(red) |
| -- Read in the PUT JSON Body |
| ngx.req.read_body() |
| local args = ngx.req.get_body_data() |
| if not args then |
| request.err(400, "Missing request body") |
| end |
| -- Convert json into Lua table |
| local decoded = cjson.decode(args) |
| -- Check for tenant id in JSON body |
| if existingTenant == nil and decoded.id ~= nil then |
| existingTenant = redis.getTenant(red, decoded.id) |
| if existingTenant == nil then |
| request.err(404, utils.concatStrings({"Unknown Tenant id ", decoded.id})) |
| end |
| end |
| -- Error checking |
| local res, err = utils.tableContainsAll(decoded, {"namespace", "instance"}) |
| if res == false then |
| request.err(err.statusCode, err.message) |
| end |
| -- Return tenant object |
| local uuid = existingTenant ~= nil and existingTenant.id or utils.uuid() |
| local tenantObj = { |
| id = uuid, |
| namespace = decoded.namespace, |
| instance = decoded.instance |
| } |
| tenantObj = redis.addTenant(red, uuid, tenantObj) |
| redis.close(red) |
| ngx.header.content_type = "application/json; charset=utf-8" |
| request.success(200, tenantObj) |
| end |
| |
| --- Check for tenant id from uri and use existing tenant if it already exists in redis |
| -- @param red Redis client instance |
| function checkForExistingTenant(red) |
| local id = ngx.var.tenant_id |
| local existing |
| -- Get object from redis |
| if id ~= nil and id ~= '' then |
| existing = redis.getTenant(red, id) |
| if existing == nil then |
| request.err(404, utils.concatStrings({"Unknown Tenant id ", id})) |
| end |
| end |
| return existing |
| end |
| |
| --- Get one or all tenants from the gateway |
| -- GET /v1/tenants |
| function getTenants() |
| local queryParams = ngx.req.get_uri_args() |
| local id = ngx.var.tenant_id |
| if id == nil or id == '' then |
| getAllTenants(queryParams) |
| else |
| local query = ngx.var.query |
| if (query ~= nil and query ~= '') then |
| if query ~= "apis" then |
| request.err(400, "Invalid request") |
| else |
| getTenantAPIs(id, queryParams) |
| end |
| else |
| getTenant(id) |
| end |
| end |
| end |
| |
| --- Get all tenants in redis |
| -- @param queryParams object containing optional query parameters |
| function getAllTenants(queryParams) |
| local red = redis.init(REDIS_HOST, REDIS_PORT, REDIS_PASS, 10000) |
| local tenants = redis.getAllTenants(red) |
| redis.close(red) |
| local tenantList |
| if next(queryParams) ~= nil then |
| tenantList = filterTenants(tenants, queryParams); |
| end |
| if tenantList == nil then |
| tenantList = {} |
| for k, v in pairs(tenants) do |
| if k%2 == 0 then |
| tenantList[#tenantList+1] = cjson.decode(v) |
| end |
| end |
| tenantList = (next(tenantList) == nil) and "[]" or cjson.encode(tenantList) |
| end |
| ngx.header.content_type = "application/json; charset=utf-8" |
| request.success(200, tenantList) |
| end |
| |
| --- Filter tenants based on query parameters |
| -- @param tenants list of tenants |
| -- @param queryParams query parameters to filter tenants |
| function filterTenants(tenants, queryParams) |
| local namespace = queryParams['filter[where][namespace]'] |
| local instance = queryParams['filter[where][instance]'] |
| -- missing or invalid query parameters |
| if (namespace == nil and instance == nil) or (instance ~= nil and namespace == nil) then |
| return nil |
| end |
| -- filter tenants |
| local tenantList = {} |
| for k, v in pairs(tenants) do |
| if k%2 == 0 then |
| local tenant = cjson.decode(v) |
| if (namespace ~= nil and instance == nil and tenant.namespace == namespace) or |
| (namespace ~= nil and instance ~= nil and tenant.namespace == namespace and tenant.instance == instance) then |
| tenantList[#tenantList+1] = tenant |
| end |
| end |
| end |
| return cjson.encode(tenantList) |
| end |
| |
| --- Get tenant by its id |
| -- @param id tenant id |
| function getTenant(id) |
| local red = redis.init(REDIS_HOST, REDIS_PORT, REDIS_PASS, 10000) |
| local tenant = redis.getTenant(red, id) |
| if tenant == nil then |
| request.err(404, utils.concatStrings({"Unknown tenant id ", id })) |
| end |
| redis.close(red) |
| ngx.header.content_type = "application/json; charset=utf-8" |
| request.success(200, cjson.encode(tenant)) |
| end |
| |
| --- Get APIs associated with tenant |
| -- @param id tenant id |
| -- @param queryParams object containing optional query parameters |
| function getTenantAPIs(id, queryParams) |
| local red = redis.init(REDIS_HOST, REDIS_PORT, REDIS_PASS, 10000) |
| local apis = redis.getAllAPIs(red) |
| redis.close(red) |
| local apiList |
| if next(queryParams) ~= nil then |
| apiList = filterTenantAPIs(id, apis, queryParams); |
| end |
| if apiList == nil then |
| apiList = {} |
| for k, v in pairs(apis) do |
| if k%2 == 0 then |
| local decoded = cjson.decode(v) |
| if decoded.tenantId == id then |
| apiList[#apiList+1] = decoded |
| end |
| end |
| end |
| apiList = (next(apiList) == nil) and "[]" cjson.encode(apiList) |
| end |
| ngx.header.content_type = "application/json; charset=utf-8" |
| request.success(200, apiList) |
| end |
| |
| --- Filter apis based on query paramters |
| -- @param queryParams query parameters to filter apis |
| function filterTenantAPIs(id, apis, queryParams) |
| local basePath = queryParams['filter[where][basePath]'] |
| local name = queryParams['filter[where][name]'] |
| -- missing query parameters |
| if (basePath == nil and name == nil)then |
| return nil |
| end |
| -- filter apis |
| local apiList = {} |
| for k, v in pairs(apis) do |
| if k%2 == 0 then |
| local api = cjson.decode(v) |
| if api.tenantId == id and |
| ((basePath ~= nil and name == nil and api.basePath == basePath) or |
| (name ~= nil and basePath == nil and api.name == name) or |
| (basePath ~= nil and name ~= nil and api.basePath == basePath and api.name == name)) then |
| apiList[#apiList+1] = api |
| end |
| end |
| end |
| return cjson.encode(apiList) |
| end |
| |
| --- Delete tenant from gateway |
| -- DELETE /v1/tenants/<id> |
| function deleteTenant() |
| local id = ngx.var.tenant_id |
| if id == nil or id == '' then |
| request.err(400, "No id specified.") |
| end |
| local red = redis.init(REDIS_HOST, REDIS_PORT, REDIS_PASS, 10000) |
| local tenant = redis.getTenant(red, id) |
| if tenant == nil then |
| request.err(404, utils.concatStrings({"Unknown tenant id ", id})) |
| end |
| redis.deleteTenant(red, id) |
| redis.close(red) |
| request.success(200, {}) |
| end |
| |
| return _M |