html form - writing ip to a hidden field

This is a discussion on html form - writing ip to a hidden field within the A Brief History of Cprogramming.com forums, part of the Community Boards category; I understand that you can use hidden input fileds on html forms and i also know how to use a ...

  1. #1
    Hamster without a wheel iain's Avatar
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    html form - writing ip to a hidden field

    I understand that you can use hidden input fileds on html forms and i also know how to use a javascript to trap someones ip address, is there any way of writing the ip address to a hidden filed?
    thanks in advance
    Monday - what a way to spend a seventh of your life

  2. #2
    &TH of undefined behavior Fordy's Avatar
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    Not too sure what you are trying, but to create a hidden feild try;

    <INPUT TYPE="HIDDEN" NAME="IP">
    Out of interest, what are you working on?

  3. #3
    Hamster without a wheel iain's Avatar
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    its a competition form and an attempt to block multiple entries i want to get the ip address of the user submitting it. I have setup a hidden filed to recieve the ip address and have written the javascript to get the ip address, im just having trouble writing the ip addresss to the hidden field
    Monday - what a way to spend a seventh of your life

  4. #4
    &TH of undefined behavior Fordy's Avatar
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    What are you doing on the server end? Wouldnt it be easier to do this there?

  5. #5
    Hamster without a wheel iain's Avatar
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    it probably would, but the server i am on is hired by a friend and wed ont have full root access, if there is a way to do it without root please let me know. We are however considering investing in our own server.
    Monday - what a way to spend a seventh of your life

  6. #6
    &TH of undefined behavior Fordy's Avatar
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    Does the host offer any cgi at all? PERL Maybe?

  7. #7
    Hamster without a wheel iain's Avatar
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    yes we have access to cgi, perl, mysql and php
    Monday - what a way to spend a seventh of your life

  8. #8
    &TH of undefined behavior Fordy's Avatar
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    You should be able to do it..... but I'm not to good yet with perl and I have no php skill at all.

    Have a peek at this.
    I found the site today and it has a lot of examples for PERL, PHP and JavaScript.

    Might have some ideas here....

  9. #9
    It's full of stars adrianxw's Avatar
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    Just an observation on your proposed technique. Most ISP's allocate an IP address at connect time, and it varies from connection to connection. By storing and checking the address, you cannot be sure that you will block multiple entries.
    Wave upon wave of demented avengers march cheerfully out of obscurity unto the dream.

  10. #10
    &TH of undefined behavior Fordy's Avatar
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    >>Just an observation on your proposed technique. Most ISP's allocate an IP address at connect time, and it varies from connection to connection. By storing and checking the address, you cannot be sure that you will block multiple entries.


    He he.... thats very true...... Maybe your best option is through cookies? Still open to abuse, but easier to manage...... And I think you can use them with Jscript... cant you?

  11. #11
    train spotter
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    If you have code running on the client, get the MAC adress of the modem/NIC. That will get you even those in LAN's.
    "Man alone suffers so excruciatingly in the world that he was compelled to invent laughter."
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    "I spent a lot of my money on booze, birds and fast cars......the rest I squandered."
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  12. #12
    Hamster without a wheel iain's Avatar
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    I think i may revert to cookies - a cookie javascript seems easier.
    As for trapping the mac address of a modem - how do you do that? this is not for my site - just out of interest.

  13. #13
    &TH of undefined behavior Fordy's Avatar
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    >>As for trapping the mac address of a modem - how do you do that? this is not for my site - just out of interest.

    I didnt know you could do that.

  14. #14
    train spotter
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    Use a NCB and Netbios().

    But if you can get the MAC there is no other MODEM/NIC with that number -> positive ID of PC.
    "Man alone suffers so excruciatingly in the world that he was compelled to invent laughter."
    Friedrich Nietzsche

    "I spent a lot of my money on booze, birds and fast cars......the rest I squandered."
    George Best

    "If you are going through hell....keep going."
    Winston Churchill

  15. #15
    &TH of undefined behavior Fordy's Avatar
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    Use a NCB and Netbios().

    But if you can get the MAC there is no other MODEM/NIC with that number -> positive ID of PC.

    Yeah I know..... but how do you access that with JavaScript?

    Is it possible????????????

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