change system to popen

app/controllers/pull_requests_controller.rb

@@ -17,6 +17,7 @@ class PullRequestsController < ApplicationController
   require 'json'
   require 'open-uri'
   require 'uri'
+  require 'string.io' # add by zxh: 将控制台shell命令输出到指定位置
 
   # 返回json格式
   def index
@@ -335,8 +336,16 @@ class PullRequestsController < ApplicationController
       pushTXInfoJson = pushTXInfo.to_json
       # 发送交易
       Rails.logger.info("before executing chain_trustie command...")
-      result = system "chain_trustie pushPRTX " + pushTXInfoJson
-      Rails.logger.info(result)
+      cmd = "chain_trustie pushPRTX " + pushTXInfoJson
+      # result = system  # 执行失败了
+      output = StringIO.new
+      IO.popen(cmd) do |pipe|
+        pipe.each do |line|
+          Rails.logger.info(line)
+        end
+      end
+      Rails.logger.info(output.string)
+      # Rails.logger.info(result)
       Rails.logger.info("after executing chain_trustie command...")
       # add by zxh end