deviantart: switch to Danbooru::Http

httprb doesn't seem to support a base_uri parameter so use URI.join with
a relative path instead

app/logical/deviant_art_api_client.rb

@@ -15,22 +15,22 @@
 
 class DeviantArtApiClient
   class Error < StandardError; end
-  BASE_URL = "https://www.deviantart.com/api/v1/oauth2"
+  BASE_URL = "https://www.deviantart.com/api/v1/oauth2/"
 
-  attr_reader :client_id, :client_secret, :httparty_options
+  attr_reader :client_id, :client_secret
 
-  def initialize(client_id, client_secret, httparty_options = {})
-    @client_id, @client_secret, @httparty_options = client_id, client_secret, httparty_options
+  def initialize(client_id, client_secret)
+    @client_id, @client_secret = client_id, client_secret
   end
 
   # https://www.deviantart.com/developers/http/v1/20160316/deviation_single/bcc296bdf3b5e40636825a942a514816
   def deviation(uuid)
-    request("/deviation/#{uuid}")
+    request("deviation/#{uuid}")
   end
 
   # https://www.deviantart.com/developers/http/v1/20160316/deviation_download/bed6982b88949bdb08b52cd6763fcafd
   def download(uuid, mature_content: "1")
-    request("/deviation/download/#{uuid}", mature_content: mature_content)
+    request("deviation/download/#{uuid}", mature_content: mature_content)
   end
 
   # https://www.deviantart.com/developers/http/v1/20160316/deviation_metadata/7824fc14d6fba6acbacca1cf38c24158
@@ -43,19 +43,15 @@ class DeviantArtApiClient
       ext_stats: ext_stats,
     }
 
-    request("/deviation/metadata", **params)
+    request("deviation/metadata", **params)
   end
 
   def request(url, **params)
-    options = {
-      base_uri: BASE_URL,
-      params: { access_token: access_token.token, **params },
-      headers: { "Accept-Encoding" => "gzip" },
-      format: :plain,
-    }
+    params = { access_token: access_token.token, **params }
 
-    body, code = HTTParty.get(url, **options)
-     JSON.parse(Zlib.gunzip(body), symbolize_names: true)
+    url = URI.join(BASE_URL, url).to_s
+    response = Danbooru::Http.cache(1.minute).get(url, params: params)
+    response.parse.with_indifferent_access
   end
 
   def oauth

app/logical/sources/strategies/deviant_art.rb

@@ -246,20 +246,15 @@ module Sources
       def page
         return nil if page_url_from_image_url.blank?
 
-        options = Danbooru.config.httparty_options.deep_merge(
-          format: :plain, 
-          headers: { "Accept-Encoding" => "gzip" }
-        )
-        resp = HTTParty.get(page_url_from_image_url, **options)
+        resp = Danbooru::Http.cache(1.minute).get(page_url_from_image_url, follow: {max_hops: 1})
 
-        if resp.success?
-          body = Zlib.gunzip(resp.body)
-          Nokogiri::HTML(body)
+        if resp.status.success?
+          Nokogiri::HTML(resp.body.to_s)
         # the work was deleted
         elsif resp.code == 404
           nil
         else
-          raise HTTParty::ResponseError.new(resp)
+          raise "failed to fetch page (got code #{resp.code})"
         end
       end
       memoize :page
@@ -280,8 +275,7 @@ module Sources
       def api_client
         api_client = DeviantArtApiClient.new(
           Danbooru.config.deviantart_client_id, 
-          Danbooru.config.deviantart_client_secret, 
-          Danbooru.config.httparty_options
+          Danbooru.config.deviantart_client_secret
         )
         api_client.access_token = Cache.get("da-access-token", 11.weeks) do
           api_client.access_token.to_hash