I have a codeigniter application that has a checkout system through authorize.net. The authorize.net library that I uses preforms a curl to make the payment, but after it is done I cannot redirect because
headers already sent by (output started at /Users/phil/Sites/Medbridge/httpdocs/application/libraries/AuthorizeCimLib.php:1
That is what the log says. If I comment out the payment thing it will redirect fine. I don't know if I am not understand a curl and that is why it is doing something or if I need to change some curl settings.
Thank you
EDIT
Here is the link to the library I am using, it is big and didn't want to repost the whole code
http://www.communitymx.com/content/article.cfm?page=4&cid=FDB14
Here is the curl part and maybe someone could see if this is doing the output to the header
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $this->_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, Array("Content-Type: text/xml"));
curl_setopt($ch, CURLOPT_HEADER, FALSE);
curl_setopt($ch, CURLINFO_HEADER_OUT, FALSE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $this->_xml);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
$this->_response = curl_exec($ch);
Thank you
This is because the server has output something to your browser, and can't redirect through php after that.
As mentioned in the comments, you're most likely including some whitespace somewhere in your code. For practice and less troubleshooting, you don't need to include the ending ?> at the bottom of your php files. This is simply not required and sometimes there might end up a space after that ?> which causes an echo during the execution of your code.
Are you includeing any file in your code with might have a at the end of the file?
Another "solution" if you may, is to echo
<script type="text/javascript">
top.location = '<?=$str_redirect_url?>';
</script>
EDIT:
If you're using Codeigniter, you should check your model, helper and library files for whitespaces.
Perhaps you can use AJAX to issue the payment call, get the response and redirect using Javascript?
Related
I try to program a webboot using PHP/CURL, but I face a problem in handling a specific page that it's loading some contents dynamically !! .. to explain more :
when I try to download the page using PHP/CURL, I do not get some contents ! then I discovered that this contents are loaded after page is loaded. and this is why CURL does not handle these missed contents.
can any one help me !
my sample code is :
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_REFERER, $reffer);
curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, $redirect);
curl_setopt($ch, CURLOPT_COOKIEFILE, ABSOLUTE_PATH."Cookies/cookies.txt");
curl_setopt($ch, CURLOPT_COOKIEJAR, ABSOLUTE_PATH."Cookies/cookies.txt");
$result = curl_exec($ch);
What URL are you trying to load? It could be that the page you're requesting has one or more AJAX requests that load content in after the fact. I don't think that cURL can accomodate runtime-loaded information via AJAX or other XHR request.
You might want to look at something like PhantomJS, which is a headless WebKit browser which will execute the page fully and return the dynamically assembled DOM.
Because the page uses javascript to load the content, you are not going to be able to do this via cURL. Check out this page for more information on the problem: http://googlewebmastercentral.blogspot.com/2007/11/spiders-view-of-web-20.html
I've set up a PHP IPN Paypal notification handler on my site to notify me of payments through PayPal. I have a Joomla install which uses an elaborate, uncommented and undocumented component for processing bookings.
I know I need to call a certain PHP script with a series of arguments once a valid IPN has been received. However, as it's Joomla I have the script in the form:
/index.php?option=com_component&controller=contr
Though obviously this isn't the actual PHP script - like I say, an elaborate framework in MVC.
What is the best method to then call this script? I was thinking of using
header("Location: index.php?opt....");
however given I've got processing before (with no output) and potentially processing after, I'm not sure if this is the best call.
Appreciate this question is rather obtuse, but any help appreciated!
You can try using CURL, if it's installed/enabled on your server.
$ch = curl_init("path/to/your/script.php");
//Include your headers here
$headers = array('');
//Set the data you want to send, as an associative array.
$postData = array("foo" => "bar", 12 => true);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, 0);
$output = curl_exec($ch);
if($output == FALSE){
// Error reporting
}
curl_close($ch);
You can't rely on PayPal to follow your redirect, or at least I wouldn't.
How about including the php-script that you want to invoke?
I'm trying to learn cURL with PHP to spoof the referrer to a website.
With the following script I expected to accomplish this...but it seems to not work.
Any ideas/suggestion where I am going wrong??
Or do you know of any tutorials that could help me figure this out?
Thanks!
Jessica
<?php
$host = "http://mysite.com";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $host);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_AUTOREFERER, false);
curl_setopt($ch, CURLOPT_REFERER, "http://google.com");
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_HEADER, 0);
$result = curl_exec($ch);
curl_close($ch);
?>
You wont be able to see the result in webserver's analytics because it might probably using a javascript to get the analytics and curl wont run/execute the javascript. All Curl will do is get the content of the page as it like it is a text file. It wont run any of the scripts or anything.
To be more clear if you have an html tag like
<img src="path/to/image/image.jpg" />
The curl will treat it as a line of text. it wont load the image.jpg from the server. The same goes with the js if their is a
<script type="text/javascript" src="analytics.js"></script>
Normally the browser will load that analytics.js and run it, but the curl wont.
Basically, I'm trying to log into a site. I've got it logging in, but the site redirects to another part of the site, and upon doing so, it redirects my browser as well.
For example:
It successfully logs into http://example.com/login.php
But then my browser goes to http://mysite.com/site.php?page=loggedin
I just want it to return the contents of the page, not be redirected to it.
How would I do this?
As requested, here is my code
// create curl resource
$ch = curl_init();
// set url
curl_setopt($ch, CURLOPT_URL, $loginURL);
//Some setopts
curl_setopt($ch, CURLOPT_USERAGENT, $agent);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_FOLLOWREDIRECT, FALSE);
curl_setopt($ch, CURLOPT_REFERRER, $referrer);
// $output contains the output string
$output = curl_exec($ch);
// close curl resource to free up system resources
curl_close($ch);
echo $output;
Figured it out. The webpage was echoing a meta refresh, and since I was echoing the output, my browser followed.
Removed the echo $output; and it no longer does that.
I feel kind of dumb for not recognizing that in the beginning.
Thanks everyone.
Using cURL you have to find the redirect and follow it, then return that page's content. I'm not sure why your browser would be redirecting unless you have some weird header code that you are returning from the login page.
set CURLOPT_FOLLOWLOCATION to false.
curl_setopt($ch , CURLOPT_FOLLOWLOCATION , FALSE);
this might help you.
I have simple code that does a head request for a URL and then prints the response headers. I've noticed that on some sites, this can take a long time to complete.
For example, requesting http://www.arstechnica.com takes about two minutes. I've tried the same request using another web site that does the same basic task, and it comes back immediately. So there must be something I have set incorrectly that's causing this delay.
Here's the code I have:
$ch = curl_init();
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 20);
curl_setopt ($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
// Only calling the head
curl_setopt($ch, CURLOPT_HEADER, true); // header will be at output
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'HEAD'); // HTTP request is 'HEAD'
$content = curl_exec ($ch);
curl_close ($ch);
Here's a link to the web site that does the same function: http://www.seoconsultants.com/tools/headers.asp
The code above, at least on my server, takes two minutes to retrieve www.arstechnica.com, but the service at the link above returns it right away.
What am I missing?
Try simplifying it a little bit:
print htmlentities(file_get_contents("http://www.arstechnica.com"));
The above outputs instantly on my webserver. If it doesn't on yours, there's a good chance your web host has some kind of setting in place to throttle these kind of requests.
EDIT:
Since the above happens instantly for you, try setting this curl setting on your original code:
curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, true);
Using the tool you posted, I noticed that http://www.arstechnica.com has a 301 header sent for any request sent to it. It is possible that cURL is getting this and not following the new Location specified to it, thus causing your script to hang.
SECOND EDIT:
Curiously enough, trying the same code you have above was making my webserver hang too. I replaced this code:
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'HEAD'); // HTTP request is 'HEAD'
With this:
curl_setopt($ch, CURLOPT_NOBODY, true);
Which is the way the manual recommends you do a HEAD request. It made it work instantly.
You have to remember that HEAD is only a suggestion to the web server. For HEAD to do the right thing it often takes some explicit effort on the part of the admins. If you HEAD a static file Apache (or whatever your webserver is) will often step in an do the right thing. If you HEAD a dynamic page, the default for most setups is to execute the GET path, collect all the results, and just send back the headers without the content. If that application is in a 3 (or more) tier setup, that call could potentially be very expensive and needless for a HEAD context. For instance, on a Java servlet, by default doHead() just calls doGet(). To do something a little smarter for the application the developer would have to explicitly implement doHead() (and more often than not, they will not).
I encountered an app from a fortune 100 company that is used for downloading several hundred megabytes of pricing information. We'd check for updates to that data by executing HEAD requests fairly regularly until the modified date changed. It turns out that this request would actually make back end calls to generate this list every time we made the request which involved gigabytes of data on their back end and xfer it between several internal servers. They weren't terribly happy with us but once we explained the use case they quickly came up with an alternate solution. If they had implemented HEAD, rather than relying on their web server to fake it, it would not have been an issue.
If my memory doesn't fails me doing a HEAD request in CURL changes the HTTP protocol version to 1.0 (which is slow and probably the guilty part here) try changing that to:
$ch = curl_init();
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 20);
curl_setopt ($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
// Only calling the head
curl_setopt($ch, CURLOPT_HEADER, true); // header will be at output
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'HEAD'); // HTTP request is 'HEAD'
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1); // ADD THIS
$content = curl_exec ($ch);
curl_close ($ch);
I used the below function to find out the redirected URL.
$head = get_headers($url, 1);
The second argument makes it return an array with keys. For e.g. the below will give the Location value.
$head["Location"]
http://php.net/manual/en/function.get-headers.php
This:
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
I wasn't trying to get headers.
I was just trying to make the page load of some data not take 2 minutes similar to described above.
That magical little options has dropped it down to 2 seconds.