Re: Common way to read/write to/from TCPSocket

From	Robert Klemme <shortcutter@googlemail.com>
Newsgroups	comp.lang.ruby
Subject	Re: Common way to read/write to/from TCPSocket
Date	2013-03-29 15:23 +0100
Message-ID	<arlmf8FrlqrU1@mid.individual.net> (permalink)
References	<d71cdf0a-a7b8-4420-8db3-8e5b22486f19@googlegroups.com>

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On 29.03.2013 08:00, yspro wrote:
> Hi there! I want to know common way to create TCPSocket, write http request and get response.
>
> My simple function:
>
> def read_from_sock(host, port)
>    sock = TCPSocket.new(host, port)
>
>    request = ''
>    request << "GET / HTTP/1.1\r\n"
>    request << "Host: #{host}\r\n"
>    request << "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1\r\n"
>    request << "\r\n"
>
>    sock.write(request)

Try to insert a sock.close_write here.

>    response = ''
>
>    until sock.eof?
>      response << sock.read
>    end

You do not need that loop because sock.read will read until EOF.

>
>    sock.close
>    response
> end
>
>
>
> read_from_sock('yahoo.com', 80) returns
>
> "HTTP/1.1 301 Redirect\r\nDate: Fri, 29 Mar 2013 06:56:20 GMT\r\nConnection: close\r\nServer: YTS/1.20.13\r\nCache-Control: no-store\r\nContent-Type: text/html\r\nContent-Language: en\r\nLocation: http://www.yahoo.com/\r\nContent-Length: 211\r\n\r\n<HEAD><TITLE>Redirect</TITLE></HEAD>\n<BODY BGCOLOR=\"white\" FGCOLOR=\"black\">\n<FONT FACE=\"Helvetica,Arial\"><B>\n \"<em>http://www.yahoo.com/</em>\".<p></B></FONT>\n\n<!-- default \"Redirect\" response (301) -->\n</BODY>\n\u0000"
>
> read_from_sock('facebook.com', 80) or read_from_sock('google.com', 80) hangs forever
>
> Where is my mistake?

Why don't you use net/http?

Cheers

	robert


-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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Common way to read/write to/from TCPSocket yspro <2ys.pro@gmail.com> - 2013-03-29 00:00 -0700
  Re: Common way to read/write to/from TCPSocket Robert Klemme <shortcutter@googlemail.com> - 2013-03-29 15:23 +0100
  Re: Common way to read/write to/from TCPSocket Simon Krahnke <overlord@gmx.li> - 2013-04-06 03:49 +0200

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