Timeout crossref requests at 2 seconds

app/controllers/index_controller.rb

@@ -10,13 +10,13 @@ def index
   def show
     url = "#{ENV['API_URL']}/dois/#{@doi}"
     response = Maremma.get(url, accept: "application/vnd.datacite.datacite+json", raw: true)
-    
+
     if response.status == 200
       @metadata = Bolognese::Metadata.new(input: response.body.fetch("data", nil), from: "datacite_json")
     else
       url = "https://api.crossref.org/works/#{@doi}/transform/application/vnd.crossref.unixsd+xml"
-      response = Maremma.get(url, accept: "text/xml", raw: true)
-      
+      response = Maremma.get(url, accept: "text/xml", raw: true, timeout: 2)
+
       if response.status == 200
         string = response.body.fetch("data", nil)
         string = Nokogiri::XML(string, nil, 'UTF-8', &:noblanks).to_s if string.present?
@@ -29,7 +29,7 @@ def show
           url = "https://doi.org/#{@doi}"
           response = Maremma.get(url, accept: "application/vnd.citationstyles.csl+json", raw: true)
           fail AbstractController::ActionNotFound if response.status != 200
-          
+
           string = response.body.fetch("data", nil)
           @metadata = Bolognese::Metadata.new(input: string, from: "citeproc")
         else