I am trying to use Luminati.oi proxy service to crawl URLs but there seems to be a problem with my server connecting to the proxy and utilizing the CURLOPT_PROXY functionality.
$curl = curl_init('http://lumtest.com/myip.json');
curl_setopt($curl, CURLOPT_PROXY, 'http://example:24000');
curl_exec($curl);
$result = curl_exec($curl); echo $result;
echo 'Curl error: ' . curl_error($curl);
curl_close($curl);
I get no response at all from the target URL and the curl_error() function returns Curl error: Failed to connect to exmaple port 24000: Connection refused there are several variations on how to compose the CURL that Luminati.io provides, none seem to work.
If I remove the CURLOPT_PROXY option and just send the request direct from my server with no proxy, it works just fine and I get the correct response back from the target URL. So my server seems okay with CURL just not the proxy function.
The URL and port for the proxy server at luminati.io seem to work fine when using the desktop proxy manager. So the proxy service seems to work okay, the target URL is good and my server can use CURL with no problem, so it seems the issue is isolated around the CURLOPT_PROXY not working. The good people over at Luminati.io think there is some type of server setting or firewall in my Apache Linux server that wont allow the proxy connection to occur, I can't find this setting anywhere and Hostgator seems useless and apathetic when asked.
So I'm hoping someone can provide some greater insight into why CURLOPT_PROXY function wont work.
You can ask Hostgator to give you access to port 22225. I think this is the correct port used by Luminati.
This is how you can contact Hostgator: http://support.hostgator.com/articles/open-new-ports
Related
Ok, I am having a hard time simply trying to get contents from Go Daddy Host server to our company's proprietary server. Originally I was using file_get_contents, then I searched all over SO and realized curl was a better option to bypass security and configuration. Here is my code:
function get_content($URL){
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $URL);
$data = curl_exec($ch);
if(curl_errno($ch)){
echo 'Curl error: ' . curl_error($ch);
}
curl_close($ch);
return $data;
}
echo 'curl:' . get_content('https://xxx-xxxxx:4032/test2.html');
Here is the error:
Curl error: Failed to connect to xxx-xxxxx.com port 4032: Connection refused
Here are some facts:
If I enter the URL into my browser, I will be able to retreive test2.html
If execute the EXACT script on a different web host (Lunar Pages), then it will work perfectly fine
get_content() will work on google.com
Go Daddy representatives cannot help us
On our server, we've disabled the firewall (while we tested this)
I would have posted this with a comment, but I don't have enough upvotes to do that. GoDaddy is one of the worst hosts for custom code. Sure they're good for things like WordPress, but if you're wanting custom functionality within your code, they're one of the worst.
This is just an example, GoDaddy blocks most file_get_contents and cURL calls within their firewall. I would go with a host like HostGator or Digital Ocean... Both are cheap but not near as limiting.
Before making a switch, I would try to run this same code on another environment locally and make sure you can connect.
I have a website (www.example.com | 123.456.789), in that machine i only have 1 web app running. i am trying to use php file_get_content() to a file which in my own server (located on some file like /var/www/my_site/public_html).
The PHP code i am referring is:
$url = 'http://example.com/282-home_default/short-wallet-tan.jpg';
var_dump($url);
$json = #file_get_contents($url);
var_dump($json);
die();
However it always returns error. When i try to do it manually, using CURL
I can confirm that i can CURL other website such as ~$ curl google.com
Can anyone suggest me what to do to resolve this. Thanks
I am using Ubuntu 14.04 LTS to host my webapp.
Some of the solution regarding this question, points out that i should downgrade my version of curl. Did that but still have the same problem.
curl failed to connect to that host's TCP port number 80. You're either not running the http server on port 80, you've made curl try to connect to the wrong server or there's something else in your network that prevents the connect handshake to succeed.
I send an item code to a web service in xml format using cUrl(php). I get the correct response in localhost, but when do it server it shows
cURL Error (7): couldn't connect to host
And here's my code:
function xml_post($post_xml, $url)
{
$user_agent = $_SERVER['HTTP_USER_AGENT'];
$ch = curl_init(); // initialize curl handle
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_FAILONERROR, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_TIMEOUT, 50);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_xml);
curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
// curl_setopt($ch, CURLOPT_PORT, $port);
$data = curl_exec($ch);
$curl_errno = curl_errno($ch);
$curl_error = curl_error($ch);
if ($curl_errno > 0) {
echo "cURL Error ($curl_errno): $curl_error\n";
} else {
echo "Data received\n";
}
curl_close($ch);
echo $data;
}
I send the item code to the tally and fetch the details from it. I tried using both the versions php 4+ and php5+, nothing works out Any solution.
CURL error code 7 (CURLE_COULDNT_CONNECT)
is very explicit ... it means Failed to connect() to host or proxy.
The following code would work on any system:
$ch = curl_init("http://google.com"); // initialize curl handle
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
$data = curl_exec($ch);
print($data);
If you can not see google page then .. your URL is wrong or you have some firewall or restriction issue.
“CURL ERROR 7 Failed to connect to Permission denied” error is caused, when for any reason curl request is blocked by some firewall or similar thing.
you will face this issue when ever the curl request is not with standard ports.
for example if you do curl to some URL which is on port 1234, you will face this issue where as URL with port 80 will give you results easily.
Most commonly this error has been seen on CentOS and any other OS with ‘SElinux’.
you need to either disable or change ’SElinux’ to permissive
have a look on this one
http://www.akashif.co.uk/php/curl-error-7-failed-to-connect-to-permission-denied
Hope this helps
If you have tried all the ways and failed, try this one command:
setsebool -P httpd_can_network_connect on
In PHP, If your network under proxy. You should set the proxy URL and port
curl_setopt($ch, CURLOPT_PROXY, "http://url.com"); //your proxy url
curl_setopt($ch, CURLOPT_PROXYPORT, "80"); // your proxy port number
This is solves my problem
In my case I had something like cURL Error (7): ... Operation Timed Out. I'm using the network connection of the company I'm working for. I needed to create some environment variables. The next worked for me:
In Linux terminal:
$ export https_proxy=yourProxy:80
$ export http_proxy=yourProxy:80
In windows I created (the same) environment variables in the windows way.
I hope it helps!
Regards!
Are you able to hit that URL by browser or by PHP script? The error shown is that you could not connect. So first confirm that the URL is accessible.
Check if port 80 and 443 are blocked. or enter - IP graph.facebook.com and enter it in etc/hosts file
you can also get this if you are trying to hit the same URL with multiple HTTP request at the same time.Many curl requests wont be able to connect and so return with error
This issue can also be caused by making curl calls to https when it is not configured on the remote device. Calling over http can resolve this problem in these situations, at least until you configure ssl on the remote.
In my case, the problem was caused by the hosting provider I was using blocking http packets addressed to their IP block that originated from within their IP block. Un-frickin-believable!!!
For a couple of days I was totally blocked on this. I'm very very new to networking/vms but was keen to try set it up myself instead of paying a hosting company to do it for me.
Context
I'm rebuilding the server side for an app that uses php routines to return various bits of data from internal sources as well as external APIs for a map based app. I have started an Oracle VM instance and have installed/set up Apache and php. All running totally fine, until one of my php routines tries to execute a cURL. I start implementing error logging to find that I don't even get a message - just '7', despite implementation being very similar to the above. My php routine accessing an internal file for data was running successfully so I was fairly sure it wasn't an Apache or php issue. I also checked my Apache error logs, nothing telling.
Solution
I nearly gave up - there's talk on disabling SELinux above and in other articles, I tried that and it did work for my purposes, but here's a really good article on why you shouldn't disable SELinux https://www.electronicdesign.com/technologies/embedded-revolution/article/21807408/dont-do-it-disabling-selinux
If temporarily disabling it works and like me you don't want to do this (but it confirms that SELinux is blocking you!), I found a neat little command that actually prints out any SELinux issues in a more readable fashion:
sealert -a /var/log/audit/audit.log
This returned the following:
found 1 alerts in /var/log/audit/audit.log
--------------------------------------------------------------------------------
SELinux is preventing php-fpm from name_connect access on the tcp_socket port 443.
Great, I now get a bit more information than just '7'. Reading further down, I can see it actually makes suggestions:
***** Plugin catchall_boolean (24.7 confidence) suggests ******************
If you want to allow httpd to can network connect
Then you must tell SELinux about this by enabling the 'httpd_can_network_connect' boolean.
Do
setsebool -P httpd_can_network_connect 1
This has been mentioned further above but now I have a bit more context and an explanation as to what it does. I run the command, and I'm in business. Furthermore, my SELinux is still set to enforcing, meaning my machine is more secure.
There are many other suggestions logged out, if you're blocked it might be worth logging out/checking out /var/log/audit/audit.log.
I was using cURL to scrape content from a site and just recently my page stated hanging when it reached curl_exec($ch). After some tests I noticed that it could load any other page from my own domain but when attempting to load from anything external I'll get a connect() timeout! error.
Here's a simplified version of what I was using:
<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,'http://www.google.com');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
$contents = curl_exec ($ch);
curl_close ($ch);
echo $contents;
?>
Here's some info I have about my host from my phpinfo():
PHP Version 5.3.1
cURL support enabled
cURL Information 7.19.7
Host i686-pc-linux-gnu
I don't have access to SSH or modifying the php.ini file (however I can read it). But is there a way to tell if something was recently set to block cURL access to external domains? Or is there something else I might have missed?
Thanks,
Dave
I'm not aware about any setting like that, it would not make much sense.
As you said you are on a remote webserver without console access I guess that your activity has been detected by the host or more likely it caused issues and so they firewalled you.
A silent iptables DROP would cause this.
When scraping google you need to use proxies for more than a few hand full of requests and you should never abuse your webservers primary IP if it's not your own. That's likely a breach of their TOS and could even result in legal action if they get banned from Google (which can happen).
Take a look at Google rank checker that's a PHP script that does exactly what you want using CURL and proper IP management.
I can't think of anything that's causing a timeout than a firewall on your side.
I'm not sure why you're getting a connect() timeout! error, but the following line:
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
If it's not set to 1, it will not return any of the page's content back into your $contents.
I'm trying to do this in PHP. I need to check if a specified host is "up"
I thought of pinging the specified host (though I'm not sure how I would, since that would require root. --help here?)
I also though of using fsockopen() to try to connect on a specified port, but that would fail too, if the host wasn't listening for connections on that port.
Additionally, some hosts block ping requests, so how might I get around this? This part isn't a necessity, though, so don't worry about this too much. I realize this one might get tricky.
I typically do a simple cURL for a public page and see if it returns a 200. If you get a 500, 404, or anything besides a 200 response you know something fishy is up.
The short answer is that there is no good, universal way to do this. Ping is about as close as you can get (almost all hosts will respond to that), but as you observed, in PHP that usually requires root access to use the low port.
Does your host allow you to execute system calls, so you could run the ping command at the OS level and then parse the results? This is probably your best bet.
$result = exec("ping -c 2 google.com");
If a host is blocking a ping request, you could do a more general portscan to look for other open ports (but this is pretty rude, don't do it to hosts who haven't given you specific permission). Nmap is a good tool for doing this. It uses quite a few tricks to figure out if a host is up and what services may or may not be running. Be careful though, as some shared hosting providers will terminate your account for "hacking activity" if you install and use Nmap, especially against hosts you do not control or have permission to probe.
Beyond that, if you are on the same unswitched ethernet layer as another host (if you happen to be on the same open WiFi network, for example), an ethernet adaptor in promiscuous mode can sniff traffic to and from a host even if it does not respond directly to you.
You could use cURL
$url = 'yoururl';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_exec($ch);
$retcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if (200==$retcode) {
// All's well
} else {
// not so much
}
For the host to be monitored at all, at least one port must be open. Is the host a web server? If so you could just open a connection to port 80, as long as it's opened successfully then at least some part of the host is working.
A better solution would be to have a script that is web accessible to just your monitor, and then you could open a connection to that, and that script would return various bits of system info.
EDIT--
How thorough do you want this test to be?
[server on] -> [apache running] -> [web application working]
Are all different levels of working. Just showing apache is returning something does at least show the server is on, but not that your web app is running.
(I realise that you may not be running anything like this but I hope it's a useful example)
EDIT--
Would it be worth installing a lightweight http server (I mean very light weight) just for monitoring?
Failing that could you install something on the hosts that phoned home every so often to show they are up?
I used gethostbyname($hostname).
The function gives you the IP if the host is up, or the input hostname if it couldn't find the IP.
if ($hostname !== gethostbyname($hostname)) {
//Host is up
}