gems: drop Mechanize, HTTParty, and Sinatra gems.

config/danbooru_default_config.rb

@@ -340,22 +340,6 @@ module Danbooru
     def twitter_api_secret
     end
 
-    # The default headers to be sent with outgoing http requests. Some external
-    # services will fail if you don't set a valid User-Agent.
-    def http_headers
-      {
-        "User-Agent" => "#{Danbooru.config.canonical_app_name}/#{Rails.application.config.x.git_hash}"
-      }
-    end
-
-    def httparty_options
-      # proxy example:
-      # {http_proxyaddr: "", http_proxyport: "", http_proxyuser: nil, http_proxypass: nil}
-      {
-        headers: Danbooru.config.http_headers
-      }
-    end
-
     # you should override this
     def email_key
       "zDMSATq0W3hmA5p3rKTgD"

config/initializers/mechanize_patch.rb

@@ -1,64 +0,0 @@
-require 'mechanize'
-
-if Rails.env.test?
-  # something about the root certs on the travis ci image causes Mechanize
-  # to intermittently fail. this is a monkey patch to reset the connection
-  # after every request to avoid dealing wtiht he issue.
-  #
-  # from http://scottwb.com/blog/2013/11/09/defeating-the-infamous-mechanize-too-many-connection-resets-bug/
-  class Mechanize::HTTP::Agent
-    MAX_RESET_RETRIES = 10
-
-    # We need to replace the core Mechanize HTTP method:
-    #
-    #   Mechanize::HTTP::Agent#fetch
-    #
-    # with a wrapper that handles the infamous "too many connection resets"
-    # Mechanize bug that is described here:
-    #
-    #   https://github.com/sparklemotion/mechanize/issues/123
-    #
-    # The wrapper shuts down the persistent HTTP connection when it fails with
-    # this error, and simply tries again. In practice, this only ever needs to
-    # be retried once, but I am going to let it retry a few times
-    # (MAX_RESET_RETRIES), just in case.
-    #
-    def fetch_with_retry(
-      uri,
-      method    = :get,
-      headers   = {},
-      params    = [],
-      referer   = current_page,
-      redirects = 0
-    )
-      action      = "#{method.to_s.upcase} #{uri}"
-      retry_count = 0
-
-      begin
-        fetch_without_retry(uri, method, headers, params, referer, redirects)
-      rescue Net::HTTP::Persistent::Error => e
-        # Pass on any other type of error.
-        raise unless e.message =~ /too many connection resets/
-
-        # Pass on the error if we've tried too many times.
-        if retry_count >= MAX_RESET_RETRIES
-          print "R"
-          # puts "**** WARN: Mechanize retried connection reset #{MAX_RESET_RETRIES} times and never succeeded: #{action}"
-          raise
-        end
-
-        # Otherwise, shutdown the persistent HTTP connection and try again.
-        print "R"
-        # puts "**** WARN: Mechanize retrying connection reset error: #{action}"
-        retry_count += 1
-        self.http.shutdown
-        retry
-      end
-    end
-
-    # Alias so #fetch actually uses our new #fetch_with_retry to wrap the
-    # old one aliased as #fetch_without_retry.
-    alias fetch_without_retry fetch
-    alias fetch fetch_with_retry
-  end
-end