如何使用Ruby从文本文件中删除以某些行开头和结尾的块？

Question

I want to remove blocks from text file starting and ending with certain lines using Ruby. 我想使用Ruby从文本行中以某些行开始和结束的地方删除块。 I have generated text file containing HTTP request response but want to remove all responses leaving only headers in file.Response blocks start with reading all... line and ends with Conn close line. 我已经生成了包含HTTP请求响应的文本文件，但想删除所有响应，仅在文件中保留标题。响应块以reading all...行开始，以Conn close行结束。 How can I remove such blocks from my text file? 如何从文本文件中删除此类块？ Example code is following: 示例代码如下：

opening connection to 209.85.175.121...
opened
<- "GET / HTTP/1.1\r\nConnection: close\r\nHost: 209.85.175.121\r\nOrigin: 192.168.100.111\r\n\r\n"
-> "HTTP/1.1 404 Not Found\r\n"
-> "Date: Thu, 23 Feb 2012 10:40:39 GMT\r\n"
-> "Content-Type: text/html; charset=UTF-8\r\n"
-> "Server: ghs\r\n"
-> "Content-Length: 931\r\n"
-> "X-XSS-Protection: 1; mode=block\r\n"
-> "X-Frame-Options: SAMEORIGIN\r\n"
-> "Connection: close\r\n"
-> "\r\n"
reading 931 bytes...
-> "<!DOCTYPE html>\n<html lang=en>\n  <meta charset=utf-8>\n  <meta name=viewport content=\"initial-scale=1, minimum-scale=1, width=device-width\">\n  <title>Error 404 (Not Found)!!1</title>\n  <style>\n    *{margin:0;padding:0}html,code{font:15px/22px arial,sans-serif}html{background:#fff;color:#222;padding:15px}body{margin:7% auto 0;max-width:390px;min-height:180px;padding:30px 0 15px}* > body{background:url(//www.google.com/images/errors/robot.png) 100% 5px no-repeat;padding-right:205px}p{margin:11px 0 22px;overflow:hidden}ins{color:#777;text-decoration:none}a img{border:0}@media screen and (max-width:772px){body{background:none;margin-top:0;max-width:none;padding-right:0}}\n  </style>\n  <a href=//www.google.com/><img src=//www.google.com/images/errors/logo_sm.gif alt=Google></a>\n  <p><b>404.</b> <ins>That\342\200\231s an error.</ins>\n  <p>The requested URL <code>/</code> was not found on this server.  <ins>That\342\200\231s all we know.</ins>\n"
read 931 bytes
Conn close


    f = File.open("Access-Control-Allow-Origin.txt")
    text = f.read
    if text =~ /"Access-Control-Allow-Origin: *\r\n"/ then
    puts "#########\n\nFound ---> Access-Control-Allow-Origin: *\n\n#########"
    else
    puts "#########\n\nNo Access-Control-Allow-Origin: * found\n\n#########"
    end

Want to do inside this if condition. 要在此条件内做。

Answer 1

You can do it using ruby flip-flop operator: 您可以使用ruby 触发器运算符来做到这一点：

def remove_unnecessary_lines(filename)
    lines = File.readlines(filename)

    File.open(filename, 'w') do |f|
        lines.each do |line|
            unless line =~ /^reading all...$/..line =~ /^Conn close$/
                f.puts line
            end
        end
    end
end

UPDATE 更新

This is a different question, but, if I understood you right, you can put your code inside lines.each (just before unless ): 这是一个不同的问题，但是，如果我理解正确的话，可以将代码放在lines.each （ unless之前， unless ）：

if line =~ /"Access-Control-Allow-Origin: *\r\n"/ then
 puts "#########\n\nFound ---> Access-Control-Allow-Origin: *\n\n#########"
else
  puts "#########\n\nNo Access-Control-Allow-Origin: * found\n\n#########"
end

如何使用Ruby从文本文件中删除以某些行开头和结尾的块？

问题描述

1 个解决方案

解决方案1
0 2012-02-23 11:10:14

如何使用Ruby从文本文件中删除以某些行开头和结尾的块？

问题描述

1 个解决方案

解决方案1 0 2012-02-23 11:10:14

解决方案1
0 2012-02-23 11:10:14