First try #78, not working yet.

httprb/http#293

Author: Eric-Guo

bin/wechat

@@ -334,8 +334,7 @@ class App < Thor
 
   desc 'material_add [MEDIA_TYPE, PATH]', '永久媒体上传'
   def material_add(type, path)
-    file = File.new(path)
-    puts wechat_api.material_add(type, file)
+    puts wechat_api.material_add(type, path)
   end
 
   desc 'material_delete [MEDIA_ID]', '删除永久素材'

lib/wechat/corp_api.rb

@@ -3,6 +3,7 @@
 require 'wechat/token/corp_access_token'
 require 'wechat/ticket/corp_jsapi_ticket'
 require 'cgi'
+require 'http/form_data'
 
 module Wechat
   class CorpApi < ApiBase
@@ -151,8 +152,9 @@ def material(media_id)
       get 'material/get', params: { media_id: media_id, agentid: agentid }, as: :file
     end
 
-    def material_add(type, file)
-      post 'material/add_material', { upload: { media: file } }, params: { type: type, agentid: agentid }
+    def material_add(type, file_path)
+      form = HTTP::FormData.create(media: HTTP::FormData::File.new(file_path)).to_s
+      post 'material/add_material', "#{form}\r\n", params: { type: type, agentid: agentid }
     end
 
     def material_delete(media_id)