Thread: Is This Possible?

  1. #1
    Registered User
    Join Date
    Jul 2002

    Is This Possible?


    I was wondering if it was possible to make a Download Accelerator or Download Maneger? And If So Where Would I Begin?

    Thank You

  2. #2
    &TH of undefined behavior Fordy's Avatar
    Join Date
    Aug 2001

    Lookup Winsock...

    Also look up the RFCs on HTTP and FTP

  3. #3
    the hat of redundancy hat nvoigt's Avatar
    Join Date
    Aug 2001
    Hannover, Germany
    >I was wondering if it was possible to make a Download Accelerator or Download Maneger?

    No. The existing ones popped into existance some years ago and are rumored to be from another dimension called xwaquorkly.

    Certainly you can write one, others managed, too. It might be a bit complicated and you should look up Sockets and look for open source of this theme.

    She was so Blonde, she spent 20 minutes looking at the orange juice can because it said "Concentrate."

    When in doubt, read the FAQ.
    Then ask a smart question.

  4. #4
    Banned master5001's Avatar
    Join Date
    Aug 2001
    Visalia, CA, USA

    Anything is possible in Neverland!

    A download manager isn't exactly a ton of coding. I think it is a common misconception that socket programming will result in a program that took several thousand lines of code. My first server, though a bit on the crappy side, ran just fine and only took about 175 lines of code. As for download accelerators you can do this depending on what you mean. You can probably squeeze a couple percent higher download rate than IE using various optimizations. However, it isn't like you are going to magically double your download speeds. If you are looking for a huge leep in performance you might as well ask "How do a make a program that increases my cpu clock speed?" Those programs you find out there, like many things on the internet, are too good to be true.

  5. #5
    Guest Sebastiani's Avatar
    Join Date
    Aug 2001
    Waterloo, Texas
    Exactly. The bottleneck is simply in the speed of the modems transfering the data. One possibility would be to have a server execute a chunk of code that you send it such as a file compressor. That is unlikely, though, and besides, some data just cannot be compressed much more than they already are. I would like to add / boast that although only 75% as efficient as WinZip in most cases, my file compressor is amazing for 1 - 10 color bitmaps. I can compress a 20MB single color bitmap to a mere 98 bytes(!) compared with WinZip's 12K! Otherwise, the preformance is modest, except on text, where it is sometimes unnoticable! Anyway, I am straying. There is really no other solution other than getting a faster modem!
    #include <cmath>
    #include <complex>
    bool euler_flip(bool value)
        return std::pow
            std::complex<float>(0, 1) 
            * std::complex<float>(std::atan(1.0)
            *(1 << (value + 2)))
        ).real() < 0;

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