FTP program help

This is a discussion on FTP program help within the C Programming forums, part of the General Programming Boards category; im trying to connect to a machine on my LAN network and download a file from the c drive. using ...

  1. #1
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    FTP program help

    im trying to connect to a machine on my LAN network and download a file from the c drive.

    using this program i have already managed to download a file from various FTP sites and save it locally, successfully.

    however, when i modified the code to point to the machine in my office, the program runs until the printf "downloading data" and then suddently skips to "press any key to continue".

    it doesnt give me any output file either. i am probably making an easy error somewhere and would like any input

    thanks

    Code:
    #include <windows.h>
    #include <stdlib.h>
    #include <stdio.h>
    #include <Wininet.h>
    
    int main ()
    
    {
    
    //filename to get
    char filename[12]="h10.ems";
    //remote computer
    char hostname[BUFSIZ]="pcecureeev2.gmv.com";
    //directory where file is
    char directory[BUFSIZ] = "c:\\";
    
    //printf("please enter ftp site\n");
    //scanf("%c", &hostname);
    
    HINTERNET hSession;
    hSession = InternetOpen("MyApp", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
    
    	if (hSession)
    	{ HINTERNET hService;
        hService = InternetConnect(hSession, hostname, 
                                   INTERNET_DEFAULT_FTP_PORT, "NULL", "NULL", 
                                   INTERNET_SERVICE_FTP, 0, 0);
    
    	if (InternetConnect==NULL)
    	{
    		printf("connection could not be established");
    	}
    
    	printf("Downloading.....please wait\n");
    
        if (hService)
        {
            if (!FtpSetCurrentDirectory(hService, directory))
            {
                printf("Error changing directory\n");
            }    
            if (FtpGetFile(hService, filename, "c:\\TEMP\\h10.ems",
                FALSE, 0, FTP_TRANSFER_TYPE_ASCII, 0))
            {
                printf("file download successful\n");
            }else{
                printf("Error getting file\n");
    			}
            InternetCloseHandle(hService);
        }
    }
    	InternetCloseHandle(hSession);
    	return 0;
    }

  2. #2
    ATH0 quzah's Avatar
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    Do you even have permission to read from your C drive over a network?


    Quzah.
    Hope is the first step on the road to disappointment.

  3. #3
    and the hat of wrongness Salem's Avatar
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    Well it seems that even formatting has fallen on deaf ears
    will this work? just a quick test needed

    1. Have you bothered to try to connect to your machine using a normal (ie working) ftp program?

    2. Look at the configuration of the FTP server on your machine (do you even have one). Most have a concept of a local root which is well down from c:\ and the chance to do all sorts of damage to your machine.

    3. Firewalls.

    4. printf("Error getting file\n");
    Yeah, and I'm sure there are all sorts of error codes which would give more information if you bothered to look.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  4. #4
    Yes, my avatar is stolen anonytmouse's Avatar
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    Code:
        hService = InternetConnect(hSession, hostname, 
                                   INTERNET_DEFAULT_FTP_PORT, "NULL", "NULL", 
                                   INTERNET_SERVICE_FTP, 0, 0);
    If you're trying to use the anonymous logon, you should use the constant NULL, rather than the string "NULL".

  5. #5
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    ill check these and get back to you...

    and i do have permission to access the computer over an ftp network

    i have tried using a program called MAX-FTP to access the computer using the exact same details and the only error i get is for a wrong password.

    could that be the problem?

    how would i put in the code to identify errors, i tried it but cant get it to work
    Last edited by shoobsie; 07-19-2005 at 04:49 AM.

  6. #6
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    ok, i managed to connect succesfully and receive a file. but is there a function that allows you to download a directory?

    a bit like "Getdirectory" or something?

  7. #7
    and the hat of wrongness Salem's Avatar
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    > how would i put in the code to identify errors, i tried it but cant get it to work
    Download ethereal (this is all mentioned in the network programming board) http://cboard.cprogramming.com/networking-device-communication/
    Get traces of what a real FTP program does, and what YOUR FTP program does.
    Compare the sequence and content of messages until you find a difference.

    Then try and understand why that difference exists.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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