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August 22, 2016 20:31
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; 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. | |
(ns app.handler | |
(:use compojure.core) | |
(:use [ring.util.response :only [response]] | |
[ring.middleware.json :only [wrap-json-response]] | |
[ring.middleware.logger :only [wrap-with-logger]]) | |
(:require [compojure.handler :as handler] | |
[compojure.route :as route] | |
[app.core :as core])) | |
(defn is-supported? | |
"Return true if a given language code, specified as a string, | |
is a key in the supported map of languages." | |
[lang-code] | |
(->> | |
(keyword lang-code) | |
(contains? core/langs))) | |
(defn no-bogus-params? | |
"Returns true if all of the supplied URL parameters | |
are valid as defined by their respective PO.DAAC service. | |
supported-params: | |
The collection of supported parameters for a particular PO.DAAC service call. | |
params: | |
The collection of URL parameters entered." | |
[supported-params given-params] | |
(every? (set supported-params) given-params)) | |
(defn metadata-dataset-is-valid? | |
"Returns true if a request for an iPReS Metadata Dataset | |
supplies the required parameters and no bogus parameters, as detailed by: | |
http://podaac.jpl.nasa.gov/ws/metadata/dataset/index.html" | |
[request] | |
(let [supported-params [:datasetId :shortName :format]] | |
(and (or (contains? request :datasetId) | |
(contains? request :shortName)) | |
(no-bogus-params? supported-params (keys request))))) | |
(defn metadata-granule-is-valid? | |
"Returns true if a request for an iPRes Metadata Granule | |
supplies the required parameters, as detailed by: | |
http://podaac.jpl.nasa.gov/ws/metadata/granule/index.html" | |
[request] | |
(let [supported-params [:datasetId :shortName :granuleName :format | |
:startTime :endTime :itemsPerPage]] | |
(and (contains? request :datasetId) | |
(contains? request :shortName) | |
(or | |
;; Request is for a metadata for a single, specified granule | |
(and (contains? request :granuleName) | |
(complement (contains? request :format))) | |
;; Request is for metadata for a list of granules archived | |
;; within the last 24 hours in Datacasting format | |
(and (contains? request :format) | |
(complement (contains? request :granuleName))) | |
;;Request is for metadata for a list of granules | |
(and (contains? request :startTime) | |
(contains? request :endTime) | |
(contains? request :format))) | |
(no-bogus-params? supported-params (keys request))))) | |
(defn search-dataset-is-valid? | |
"Returns true if a request for an iPReS Search Dataset | |
supplies the appropriate parameters, as detailed by: | |
http://podaac.jpl.nasa.gov/ws/search/dataset/index.html" | |
[request] | |
(let [supported-params [:keyword :startTime :endTime :startIndex | |
:itemsPerPage :datasetId :shortName :instrument | |
:satellite :fileFormat :status :processLevel | |
:pretty :format :sortBy :bbox :full]] | |
(and (not (= request nil)) | |
(no-bogus-params? supported-params (keys request))))) | |
(defn search-granule-is-valid? | |
"Returns true if a request for an iPReS Search Granule | |
supplies the required parameters, as detailed by: | |
http://podaac.jpl.nasa.gov/ws/search/granule/index.html" | |
[request] | |
(let [supported-params [:datasetId :shortName :startTime :endTime | |
:bbox :startIndex :itemsPerPage :sortBy | |
:format :pretty]] | |
(and (or (contains? request :datasetId) | |
(contains? request :shortName)) | |
(no-bogus-params? supported-params (keys request))))) | |
(defn extract-granule-is-valid? | |
"Returns true if a request for an iPReS Extract Granule | |
supplies the required parameters, as detailed by: | |
http://podaac.jpl.nasa.gov/ws/extract/granule/index.html" | |
[request] | |
(let [required-params [:datasetId :shortName :granuleName :bbox :format]] | |
(every? (set (keys request)) required-params))) | |
(defn api-routes | |
"The API routes for the iPReS service. | |
Nested route structure under supported languages." | |
[lang] | |
(routes | |
(GET "/metadata/dataset" [& request] | |
(let [req (dissoc request :lang)] | |
(if (metadata-dataset-is-valid? req) | |
(response {:extracted-text (core/translate-request | |
"metadata/dataset" req lang "")})))) | |
(GET "/metadata/granule" [& request] | |
(let [req (dissoc request :lang)] | |
(if (metadata-granule-is-valid? req) | |
(response (core/translate-request | |
"metadata/granule" req lang ""))))) | |
(GET "/search/dataset" [& request] | |
(let [req (dissoc request :lang)] | |
(if (search-dataset-is-valid? req) | |
(response (core/translate-request | |
"search/dataset" req lang ""))))) | |
(GET "/search/granule" [& request] | |
(let [req (dissoc request :lang)] | |
(if (search-granule-is-valid? req) | |
(response (core/translate-request | |
"search/granule" req lang ""))))) | |
;;(GET "/extract/granule" [& request] | |
;; (let [req (dissoc request :lang)] | |
;; (if (extract-granule-is-valid? req) | |
;; (response (core/translate-request | |
;; "extract/granule" req lang ""))))) | |
(route/not-found | |
(response "Not found.")))) | |
;; iPReS routes - 404's if language unsupported | |
(defroutes ipres | |
(context "/:lang" [lang] | |
(if (is-supported? lang) | |
(api-routes lang) | |
(response "Not found.")))) | |
(def app | |
(-> | |
(handler/api ipres) | |
(wrap-with-logger) | |
;; this code will go away eventually ... maybe | |
(wrap-json-response))) |
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