上传头像会进行压缩

Gemfile

@@ -24,6 +24,8 @@ gem 'acts-as-taggable-on', '2.4.1'
 gem 'spreadsheet'
 gem 'ruby-ole'
 gem 'rails_kindeditor',path:'lib/rails_kindeditor'
+gem "rmagick", ">= 2.0.0"
+
 group :development do
   gem 'grape-swagger'
   #gem 'grape-swagger-ui', git: 'https://github.com/guange2015/grape-swagger-ui.git'
@@ -48,14 +50,6 @@ group :test do
   gem 'selenium-webdriver', '~> 2.42.0'
 
   gem "faker"
-  # platforms :mri, :mingw do
-  #   group :rmagick do
-  #     # RMagick 2 supports ruby 1.9
-  #     # RMagick 1 would be fine for ruby 1.8 but Bundler does not support
-  #     # different requirements for the same gem on different platforms
-  #     gem "rmagick", ">= 2.0.0"
-  #   end
-  #end
 end
 
 # Gems used only for assets and not required

app/controllers/avatar_controller.rb

@@ -56,25 +56,9 @@ class AvatarController < ApplicationController
 #    self.digest = md5.hexdigest
     end
     @temp_file = nil
-    # @avatar = Avatar.new(:receive_file => request.raw_post)
-    # @avatar.source_id = User.current.id
-    # @avatar.image_file = params[:filename].presence || Redmine::Utils.random_hex(16)
-    # saved = @avatar.save
-    begin
-      f = Magick::ImageList.new(diskfile)
-      # gif格式不再做大小处理
-      if f.format != 'GIF'
-        width = 300.0
-        proportion = (width/f[0].columns)
-        height = (f[0].rows*proportion)
-        f.resize_to_fill!(width,height)
-        f.write(diskfile)
-      end
-
-    rescue Exception => e
-      logger.error "[Error] avatar : avatar_controller#upload ===> #{e}"
-    end
 
+    image = Trustie::Utils::Image.new(diskfile,true)
+    image.compress(300)
 
     respond_to do |format|
       format.js

app/controllers/my_controller.rb

@@ -95,6 +95,7 @@ class MyController < ApplicationController
     @pref = @user.pref
     diskfile = disk_filename('User', @user.id)
     diskfile1 = diskfile + 'temp'
+    begin
       if request.post?
         @user.safe_attributes = params[:user]
         @user.pref.attributes = params[:pref]
@@ -121,32 +122,7 @@ class MyController < ApplicationController
 
         if @user.save && @se.save
           # 头像保存
-        if File.exist?(diskfile1)
+          FileUtils.mv diskfile1, diskfile, force: true
-          if File.exist?(diskfile)
-            File.delete(diskfile)
-          end
-          File.open(diskfile1, "rb") do |f|
-            buffer = f.read(10)
-            if buffer != "DELETE"
-              File.open(diskfile1, "rb") do |f1|
-                File.open(diskfile, "wb") do |f|
-                  buffer = ""
-                  while (buffer = f1.read(8192))
-                    f.write(buffer)
-                  end
-                end
-              end
-
-              # File.rename(diskfile + 'temp',diskfile);
-            end
-          end
-        end
-
-        # 确保文件被删除
-        if File.exist?(diskfile1)
-          File.delete(diskfile1)
-        end
-
           @user.pref.save
           @user.notified_project_ids = (@user.mail_notification == 'selected' ? params[:notified_project_ids] : [])
           set_language_if_valid @user.language
@@ -154,17 +130,11 @@ class MyController < ApplicationController
           redirect_to user_url(@user)
           return
         else
-        # 确保文件被删除
-        if File.exist?(diskfile1)
-          File.delete(diskfile1)
-        end
           @user.login = lg
         end
-    else
-      # 确保文件被删除
-      if File.exist?(diskfile1)
-        File.delete(diskfile1)
       end
+    ensure
+      File.delete(diskfile1) if File.exist?(diskfile1)
     end
 
   end

app/views/avatar/_avatar_form.html.erb

@@ -74,3 +74,6 @@
   <%= javascript_include_tag 'avatars' %>
 <% end %>
 </div>
+
+
+

app/views/avatar/upload.js.erb

@@ -1,4 +1,4 @@
 var imgSpan = $('#avatar_image');
 
-imgSpan.attr({"src":'<%= @urlfile.to_s << "?" << Time.now.to_s%>'});
+imgSpan.attr({"src":'<%= "#{@urlfile.to_s}?#{Time.now.to_i}" %>'});
   

lib/tasks/avatar.rake

@@ -0,0 +1,11 @@
+desc "compress and backup avatar"
+task :compress_avatar => :environment do
+  path = File.join(Rails.root, "public/images/avatars/User")
+  Dir.foreach(path) do |f|
+    if f.to_s =~ /^\d+$/
+      puts f
+      image = Trustie::Utils::Image.new(File.join(path,f), true)
+      image.compress(300)
+    end
+  end
+end

lib/trustie.rb

@@ -1 +1,2 @@
 require 'trustie/utils'
+require 'trustie/utils/image'

lib/trustie/utils/image.rb

@@ -0,0 +1,35 @@
+#coding=utf-8
+
+module Trustie
+  module Utils
+    class Image
+      def initialize(file, bak)
+        @file = file
+        @bak = bak
+      end
+
+      def compress(size=300)
+        backup if @bak
+        begin
+          f = Magick::ImageList.new(@file)
+          if f.format != 'GIF'
+            width = size
+            if f[0].columns > width
+              proportion = (width/f[0].columns.to_f)
+              height = (f[0].rows*proportion)
+              f.resize_to_fill!(width,height.to_i)
+              f.write(@file)
+            end
+          end
+        rescue Exception => e
+          logger.error "[Error] compress : ===> #{e}"
+        end
+      end
+
+      def backup
+        FileUtils.cp @file, "#{@file}.bak" 
+      end
+
+    end
+  end
+end

public/javascripts/avatars.js

@@ -190,6 +190,9 @@ function dragOutHandler(e) {
 }
 
 function setupFileDrop() {
+  $('#avatar_image').on('click', function(){
+    console.log("click");
+  });
   if (window.File && window.FileList && window.ProgressEvent && window.FormData) {
 
     $.event.fixHooks.drop = { props: [ 'dataTransfer' ] };