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s3_impl.clj
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s3_impl.clj
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(ns andrewslai.clj.persistence.filesystem.s3-impl
(:require [amazonica.aws.s3 :as s3]
[amazonica.core :as amazon]
[andrewslai.clj.persistence.filesystem :as fs]
[clojure.spec.alpha :as s]
[clojure.string :as string]
[ring.util.http-response :refer [internal-server-error not-found]]
[ring.util.mime-type :as mt]
[ring.util.response :as ring-response]
[taoensso.timbre :as log])
(:import
[com.amazonaws.auth AWSCredentialsProviderChain ContainerCredentialsProvider EnvironmentVariableCredentialsProvider]
com.amazonaws.auth.profile.ProfileCredentialsProvider))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Install multimethod to get resource-data from URLs using S3-PROTOCOL
;; Useful for teaching http-mw how to retrieve static assets from a FS
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(def S3-PROTOCOL
"S3 protocol"
"s3p")
(defmethod ring-response/resource-data (keyword S3-PROTOCOL)
[url]
(let [conn (.openConnection url)]
{:content (.getContent url)}))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Install multimethod to get resource-data from URLs using S3-PROTOCOL
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; TODO: Is this necesssary?
(def CustomAWSCredentialsProviderChain
(AWSCredentialsProviderChain.
[^AWSCredentialsProvider (new EnvironmentVariableCredentialsProvider)
^AWSCredentialsProvider (new ProfileCredentialsProvider)
^AWSCredentialsProvider (new ContainerCredentialsProvider)]))
(defn exception-response
[{:keys [status-code] :as exception-map}]
(case status-code
404 (not-found)
(internal-server-error "Unknown exception")))
(defn valid-key?
[s]
(re-matches #"[0-9a-zA-Z/!-_.*'()]+" s))
(defn byte-array-input-stream?
[obj]
(= (class obj) java.io.ByteArrayInputStream))
(s/def :s3/bucket-name string?)
(s/def :s3/prefix (s/and string? valid-key?))
(s/def :s3/key (s/and string? valid-key?))
(s/def :s3/input-stream byte-array-input-stream?)
(s/def :s3.summary/size int?)
(s/def :s3.summary/key :s3/key)
(s/def :s3.summary/etag string?)
(s/def :s3.summary/summary
(s/keys :req-un [:s3.summary/size
:s3.summary/key
:s3.summary/etag]))
(s/def :s3.summary/summaries
(s/coll-of :s3.summary/summary))
(s/def :s3.metadata/content-length int?)
(s/def :s3.metadata/content-type (set (vals mt/default-mime-types)))
(s/def :s3.metadata/user-metadata (s/map-of string? any?))
(s/def :s3.metadata/metadata
(s/keys :opt-un [:s3.metadata/content-length
:s3.metadata/content-type
:s3.metadata/user-metadata]))
(defn prepare-metadata
"Format a map of file metadata for upload to S3"
[{:keys [content-length content-type] :as metadata}]
(let [user-meta (dissoc metadata :content-length :content-type)]
(merge {:content-length content-length
:content-type content-type}
(when-not (empty? user-meta) {:user-metadata user-meta}))))
(def FOLDER-DELIMITER "/")
(defn folder?
([s]
(folder? s FOLDER-DELIMITER))
([s delim]
(= delim (str (last s)))))
(defn extract-name
[path s]
(let [x (last (string/split s (re-pattern FOLDER-DELIMITER)))]
(cond
(= path s) ""
(folder? s) (str x FOLDER-DELIMITER)
:else x)))
(defn summary->file
[path {:keys [key] :as summary}]
(assoc summary
:name (extract-name path key)
:path key
:type (if (folder? key)
:directory
:file)))
(defn prefix->file
[path prefix]
{:name (extract-name path prefix)
:path prefix
:type :directory})
;; Add wrapper functions that are spec'ed out
(defrecord S3 [bucket creds protocol]
fs/FileSystem
(ls [_ path]
(log/infof "S3 List Objects `%s/%s`" bucket path)
(let [result (s3/list-objects-v2 creds
{:bucket-name bucket
:prefix path
:delimiter FOLDER-DELIMITER})]
(:object-summaries result)
(concat (map (partial summary->file path) (:object-summaries result))
(map (partial prefix->file path) (:common-prefixes result)))))
(get-file [_ path]
(log/infof "S3 Get Object `%s/%s`" bucket path)
(try
(-> (s3/get-object creds {:bucket-name bucket :key path})
:input-stream)
(catch Exception e
(log/warn "Could not retrieve object" (amazon/ex->map e))
(exception-response (amazon/ex->map e)))))
(put-file [_ path input-stream metadata]
(log/infof "S3 Put Object `%s/%s`" bucket path)
(try
(s3/put-object creds
{:bucket-name bucket
:key path
:input-stream input-stream
:metadata (prepare-metadata metadata)})
(catch Exception e
(log/error "Could not put object" e)
(exception-response (amazon/ex->map e)))))
(get-protocol [_]
(or protocol S3-PROTOCOL)))
(comment ;; Playing with S3
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; PUT file
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(def b
(-> (clojure.java.io/resource "public/images/lock.svg")
clojure.java.io/input-stream
slurp
(.getBytes)))
(fs/put-file (map->S3 {:bucket "andrewslai"
:creds CustomAWSCredentialsProviderChain})
"lock.svg"
(java.io.ByteArrayInputStream. b)
{:content-type "image/svg"
:content-length (count b)
:something "some"})
(def c
(clojure.java.io/file "resources/public/images/lock.svg"))
(fs/put-file (map->S3 {:bucket "andrewslai"
:creds CustomAWSCredentialsProviderChain})
"lock.svg"
(clojure.java.io/input-stream c)
{:content-type "image/svg"
:content-length (.length c)
:something "some"})
(s3/put-object CustomAWSCredentialsProviderChain
{:bucket-name "andrewslai"
:key "lock.svg"
:input-stream (java.io.ByteArrayInputStream. b)
:metadata {:content-type "image/svg"
:content-length (count b)
:user-metadata {:something "some-value"}}})
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Just basic play
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(s3/list-buckets)
(amazon/get-credentials nil)
(keys (bean (.getCredentials CustomAWSCredentialsProviderChain)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; LIST files
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(fs/ls (map->S3 {:bucket "andrewslai-wedding"
:creds CustomAWSCredentialsProviderChain})
"public/")
;; => ({:path "public/css/",
;; :key "public/css/",
;; :storage-class "STANDARD",
;; :name "",
;; :type :directory,
;; :etag "d41d8cd98f00b204e9800998ecf8427e",
;; :last-modified #clj-time/date-time "2021-05-27T18:30:39.000Z",
;; :size 0,
;; :bucket-name "andrewslai-wedding"}
;; {:path "public/css/wedding.css",
;; :key "public/css/wedding.css",
;; :storage-class "STANDARD",
;; :name "wedding.css",
;; :type :file,
;; :etag "71bd22a749b50d4a5b90a8f538b72a60",
;; :last-modified #clj-time/date-time "2021-05-27T18:33:10.000Z",
;; :size 1121,
;; :bucket-name "andrewslai-wedding"})
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; GET file
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(fs/get-file (map->S3 {:bucket "andrewslai-wedding"
:creds CustomAWSCredentialsProviderChain})
"index.html")
)
(comment
;; Http MW loading static content
(def loader
(-> (map->S3 {:bucket "andrewslai-wedding"
:creds CustomAWSCredentialsProviderChain})
(protocols/filesystem-loader)))
(.getResource loader "media/")
(ring-response/resource-response "media/" {:loader loader})
(ring-response/resource-response "media/rings.jpg" {:loader loader})
)