discord: add /tagme command.

app/logical/danbooru/http.rb

@@ -11,8 +11,9 @@ require "danbooru/http/unpolish_cloudflare"
 
 module Danbooru
   class Http
-    class DownloadError < StandardError; end
-    class FileTooLargeError < StandardError; end
+    class Error < StandardError; end
+    class DownloadError < Error; end
+    class FileTooLargeError < Error; end
 
     DEFAULT_TIMEOUT = 10
     MAX_REDIRECTS = 5
@@ -43,7 +44,7 @@ module Danbooru
     end
 
     def put(url, **options)
-      request(:get, url, **options)
+      request(:put, url, **options)
     end
 
     def post(url, **options)
@@ -54,6 +55,14 @@ module Danbooru
       request(:delete, url, **options)
     end
 
+    def get!(url, **options)
+      request!(:get, url, **options)
+    end
+
+    def post!(url, **options)
+      request!(:post, url, **options)
+    end
+
     def follow(*args)
       dup.tap { |o| o.http = o.http.follow(*args) }
     end
@@ -136,6 +145,16 @@ module Danbooru
       fake_response(599, "")
     end
 
+    def request!(method, url, **options)
+      response = request(method, url, **options)
+
+      if response.status.in?(200..399)
+        response
+      else
+        raise Error, "#{method.upcase} #{url} failed (HTTP #{response.status})"
+      end
+    end
+
     def fake_response(status, body)
       ::HTTP::Response.new(status: status, version: "1.1", body: ::HTTP::Response::Body.new(body))
     end