[SOLVED] PHP Newbie Help: ftp file download

chsims1 · 2011-02-08 17:22:51

Hi,

I am trying to modify a php script which downloads a text file from a website. My modified script, simply replaces 'http' with 'ftp' in line 4 below, and obviously the host/path are different.

function get_taf($icao) {
$host = 'tgftp.nws.noaa.gov';
    $path = '/data/forecasts/shorttaf/stations/';
    $rawfile = 'ftp://' . $host . $path . $icao . '.TXT';
    $res = '';
    $res = file($rawfile);

Unfortunately, this gives the error: "Warning: file() [function.file]: connect() failed: Connection timed out in" at the last line of the code above. If I simply type in the contents of $rawfile into my browser address bar, then back comes the expected text immediately.

I am pretty sure that this is probably something very basic here, but I do not have the knowledge of php to know what. Help please?

Last edited by chsims1 (2011-02-11 14:10:20)

iFSS · 2011-02-08 20:11:23

Are you behind a firewall? If so, you might need to send a PASV command to the server to enable passive mode.

It can be done with the ftp extension: enable the ftp extension in /etc/php/php.ini, restart php (or Apache etc), and see http://uk2.php.net/manual/en/function.ftp-pasv.php. It will probably be easiest for you to get the file with the ftp functions, before using file(), if you really need the file as an array.

Otherwise, you could try using curl instead: http://uk2.php.net/manual/en/book.curl.php (passive by default iirc)

chsims1 · 2011-02-09 09:12:45

The php script is on a webhosting site, not on my PC.

hjl3 · 2011-02-09 18:34:26

Your code is sound (tested from my own server).

Be sure that PHP has "allow_url_fopen" enabled. I would also take iFSS's advice. Your host may have iptables / their firewalls configured in such a way that you need to use PASV FTP.

iFSS · 2011-02-09 18:50:37

The same applies (probably, you're not giving enough information to guess/conclude anything else).

The file() function will be connecting to the FTP server using active mode, so the FTP server will be trying to initiate the connection to transfer the data. Your webhost is probably using a firewall, or NAT, or something that is preventing the FTP server from making that connection. So you need to use passive mode instead, whereby your server initiates the data connection.

Find out whether your webhost has enabled the ftp or curl extensions (you can check if they are enabled with http://uk2.php.net/manual/en/function.phpinfo.php - also check that allow_url_fopen is 'On' with this, to make sure), then use either method to get the file. You'll find loads more info on curl with php by googling.

* edit - soz hjl3, didn't see your post, am typing mine too slow at the moment (learning to use Dvorak)

Last edited by iFSS (2011-02-09 18:54:48)

chsims1 · 2011-02-10 08:13:58

Thank you both very much. I'll look into what the host has/has not got enabled.

Edit: allow_url_fopen is definitely on. I also tried to use cURL (I like this), but with the same result "couldn't connect to host," so looking increasingly likely that it is some sort of restriction from webhost?? They still haven't got back to me about my query.

Last edited by chsims1 (2011-02-10 17:28:26)

iFSS · 2011-02-11 00:25:42

chsims1 wrote:

Edit: allow_url_fopen is definitely on. I also tried to use cURL (I like this), but with the same result "couldn't connect to host," so looking increasingly likely that it is some sort of restriction from webhost?? They still haven't got back to me about my query.

If you have got the hang of curl, try a test of accessing a remote file over http using it (the url in your 1st post is a good candidate) - if no joy, then your host may be blocking any outgoing connections (so time to find a new host). If it works, at least it is narrowed down to an ftp problem, and other things can be tried.

chsims1 · 2011-02-11 10:19:09

I did indeed try using curl to get the file, but couldn't connect.

I have just tried ftping onto my webhost server, and then ftping from there to the server that I am interested in. It worked fine, so I can conclude that outgoing ftp is not blocked by the webhost. Now, I really am confused

iFSS · 2011-02-11 10:42:04

chsims1 wrote:

I did indeed try using curl to get the file, but couldn't connect.

Just to clarify - curl isn't working for files over http as well as ftp?

How about ftp://mirrors.uk2.net/pub/archlinux/iso … d5sums.txt / http://archlinux.mirrors.uk2.net/iso/latest/md5sums.txt - do either of those work with your curl script on the web server?

* edit, also try a simple script like

<?php 
$http = file_get_contents('http://archlinux.mirrors.uk2.net/iso/latest/md5sums.txt');
echo "http:\n $http \n\n";

$ftp = file_get_contents('ftp://mirrors.uk2.net/pub/archlinux/iso/2010.05/md5sums.txt');
echo "ftp:\n $ftp";

Last edited by iFSS (2011-02-11 10:47:45)

chsims1 · 2011-02-11 11:09:21

I didn't try curl with http because an earlier part of my script successfully deals with an http site. So, I presume that curl will work fine too.

Using your script the http get works fine, the ftp failed to open a stream.

This looks like ftp is being blocked, which is why I was so surprised that I could ftp out from my webhost.

Edit: just to be sure, tried curl for http site & works fine.

Here's the phpinfo from the webhost; anything here that could be stopping this working (apologies for length)?

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Variable    Value
_REQUEST["__utma"]    220720477.692680101.1295713305.1297411511.1297422264.57
_REQUEST["__utmz"]    220720477.1297422264.57.57.utmcsr=ig.gmodules.com|utmccn=(referral)|utmcmd=referral|utmcct=/gadgets/ifr
_REQUEST["__utmc"]    220720477
_REQUEST["__utmb"]    220720477.5.10.1297422264
_COOKIE["__utma"]    220720477.692680101.1295713305.1297411511.1297422264.57
_COOKIE["__utmz"]    220720477.1297422264.57.57.utmcsr=ig.gmodules.com|utmccn=(referral)|utmcmd=referral|utmcct=/gadgets/ifr
_COOKIE["__utmc"]    220720477
_COOKIE["__utmb"]    220720477.5.10.1297422264
_SERVER["UNIQUE_ID"]    TVUeC0o07TsAAApjRe0AAAAX
_SERVER["HTTP_HOST"]    thesutherlands.co.uk
_SERVER["HTTP_USER_AGENT"]    Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101216 Firefox/3.6.13
_SERVER["HTTP_ACCEPT"]    text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
_SERVER["HTTP_ACCEPT_LANGUAGE"]    en-us,en;q=0.5
_SERVER["HTTP_ACCEPT_ENCODING"]    gzip,deflate
_SERVER["HTTP_ACCEPT_CHARSET"]    ISO-8859-1,utf-8;q=0.7,*;q=0.7
_SERVER["HTTP_KEEP_ALIVE"]    115
_SERVER["HTTP_CONNECTION"]    keep-alive
_SERVER["HTTP_COOKIE"]    __utma=220720477.692680101.1295713305.1297411511.1297422264.57; __utmz=220720477.1297422264.57.57.utmcsr=ig.gmodules.com|utmccn=(referral)|utmcmd=referral|utmcct=/gadgets/ifr; __utmc=220720477; __utmb=220720477.5.10.1297422264
_SERVER["PATH"]    /bin:/usr/bin:/sbin:/usr/sbin
_SERVER["SERVER_SIGNATURE"]    no value
_SERVER["SERVER_SOFTWARE"]    Apache
_SERVER["SERVER_NAME"]    thesutherlands.co.uk
_SERVER["SERVER_ADDR"]    74.52.237.59
_SERVER["SERVER_PORT"]    80
_SERVER["REMOTE_ADDR"]    83.100.132.29
_SERVER["DOCUMENT_ROOT"]    /virtual/users/e15821-16740/web
_SERVER["SERVER_ADMIN"]    webmaster@thesutherlands.co.uk
_SERVER["SCRIPT_FILENAME"]    /virtual/users/e15821-16740/web/test.php
_SERVER["REMOTE_PORT"]    52146
_SERVER["GATEWAY_INTERFACE"]    CGI/1.1
_SERVER["SERVER_PROTOCOL"]    HTTP/1.1
_SERVER["REQUEST_METHOD"]    GET
_SERVER["QUERY_STRING"]    no value
_SERVER["REQUEST_URI"]    /test.php
_SERVER["SCRIPT_NAME"]    /test.php
_SERVER["PHP_SELF"]    /test.php
_SERVER["REQUEST_TIME"]    1297423883

Last edited by chsims1 (2011-02-11 11:35:56)

iFSS · 2011-02-11 11:40:00

That definitely looks like the host is the problem then, if ftp doesn't work for scripts at all (most likely their firewall config, or possibly a proxy?) - see if they get back to your query & will resolve the issue.

Failing that (& if you can't change hosts), contact the admin of the ftp server that you are connecting to, to find out if the file can be accessed over http somewhere. If not, and no other option, look into accessing the file using a web ftp client/proxy service - though you'll have to be 100% certain of their trustworthiness.

* edit - the settings seem fine, ftp streams should work

Last edited by iFSS (2011-02-11 11:53:34)

chsims1 · 2011-02-11 14:11:20

Thanks for all the help, the webhost has confirmed it is not possible to ftp a remote site from a script. I will have to think again.

Arch Linux

#1 2011-02-08 17:22:51

[SOLVED] PHP Newbie Help: ftp file download

#2 2011-02-08 20:11:23

Re: [SOLVED] PHP Newbie Help: ftp file download

#3 2011-02-09 09:12:45

Re: [SOLVED] PHP Newbie Help: ftp file download

#4 2011-02-09 18:34:26

Re: [SOLVED] PHP Newbie Help: ftp file download

#5 2011-02-09 18:50:37

Re: [SOLVED] PHP Newbie Help: ftp file download

#6 2011-02-10 08:13:58

Re: [SOLVED] PHP Newbie Help: ftp file download

#7 2011-02-11 00:25:42

Re: [SOLVED] PHP Newbie Help: ftp file download

#8 2011-02-11 10:19:09

Re: [SOLVED] PHP Newbie Help: ftp file download

#9 2011-02-11 10:42:04

Re: [SOLVED] PHP Newbie Help: ftp file download

#10 2011-02-11 11:09:21

Re: [SOLVED] PHP Newbie Help: ftp file download

#11 2011-02-11 11:40:00

Re: [SOLVED] PHP Newbie Help: ftp file download

#12 2011-02-11 14:11:20

Re: [SOLVED] PHP Newbie Help: ftp file download

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