urllib2 problem/bug: Request.add_header does() nothing?

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  • kelio@yandex.ru
    #1

    urllib2 problem/bug: Request.add_header does() nothing?

    I have a simple cgi-script on a server that prints all key-value pairs
    from a request. And it really works when i use a browser and type smth
    like http://server/cgi-bin/test?name=mike&johny=dummy. But when I use
    the following script, nothing is printed (like i type
    http://server/cgi-bin/test request in the browser).

    What is wrong about it? It's hard to believe there's a bug nobody's
    noticed for such a long time (I've tried Python 2.1.3 and 2.4.1 on
    Windows, and 2.2.2 on Linux).

    I've also tried to make a request using urllib (without 2) sending
    pairs as data in a POST request - and it also worked.

    Thanks for help!

    elio.

    #!/usr/bin/python

    import urllib2

    request = urllib2.Request (r"http://server/cgi-bin/test")
    request.add_hea der("product", "SohoCore")
    request.add_hea der("version", "1.1")
    request.add_hea der("build", "1251")

    reply = urllib2.urlopen (request).readl ines()

    for i in reply:
    print i

    Tags: None
    • Fuzzyman
      #2
      Re: urllib2 problem/bug: Request.add_hea der does() nothing?



      kelio@yandex.ru wrote:[color=blue]
      > I have a simple cgi-script on a server that prints all key-value pairs
      > from a request. And it really works when i use a browser and type smth
      > like http://server/cgi-bin/test?name=mike&johny=dummy. But when I use
      > the following script, nothing is printed (like i type
      > http://server/cgi-bin/test request in the browser).
      >
      > What is wrong about it? It's hard to believe there's a bug nobody's
      > noticed for such a long time (I've tried Python 2.1.3 and 2.4.1 on
      > Windows, and 2.2.2 on Linux).
      >
      > I've also tried to make a request using urllib (without 2) sending
      > pairs as data in a POST request - and it also worked.
      >
      > Thanks for help!
      >
      > elio.
      >
      > #!/usr/bin/python
      >
      > import urllib2
      >
      > request = urllib2.Request (r"http://server/cgi-bin/test")
      > request.add_hea der("product", "SohoCore")
      > request.add_hea der("version", "1.1")
      > request.add_hea der("build", "1251")
      >
      > reply = urllib2.urlopen (request).readl ines()
      >
      > for i in reply:
      > print i[/color]


      The add_header method adds http headers to your http request - it
      *doesn't* post any data to your CGI.

      What you need to do is encode a dictionary of your parameters using
      ``urllib.urlenc ode`` (*not* urllib2) - then pass it as the second
      parameter to urllib2.urlopen .

      HTH

      Best Regards,

      Fuzzy
      http://www.voidspace.org.uk/python


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