#37 check if url is valid

app/controllers/api/v1/posts_controller.rb

@@ -1,6 +1,6 @@
 class Api::V1::PostsController < Api::V1::ApplicationController
 
-  before_action :permit_params, :map_post_type, :get_post, only: [:create]
+  before_action :permit_params, :check_url, :map_post_type, :get_post, only: [:create]
   before_action :load_post, only: [:add_viewed_times, :show]
 
   skip_before_action :authenticate_user_from_token, only: [:posts, :show, :liked_posts, :bookmarked_posts]
@@ -57,7 +57,7 @@ class Api::V1::PostsController < Api::V1::ApplicationController
 
   def search
     params.permit(:keywords)
-    render json: Post.where('title LIKE ?',"%#{params[:keywords]}%").page(params[:page]), each_serializer: EachPostSerializer
+    render json: Post.where('title LIKE ?', "%#{params[:keywords]}%").page(params[:page]), each_serializer: EachPostSerializer
   end
 
   private
@@ -86,8 +86,18 @@ class Api::V1::PostsController < Api::V1::ApplicationController
     end
   end
 
+  def check_url
+    begin
+      uri = URI.parse params[:url]
+      res = uri.kind_of?(URI::HTTP)
+    rescue URI::InvalidURIError
+      res = false
+    end
+    return render json: {msg: 'URL不合法, 请重新输入'}, status: 400 unless res
+  end
+
   def process_post
-    if  !@post.processed
+    if !@post.processed
       ProcessPostWorker.perform_async @post.url
     end
   end