I would love a code snippet that allowed me to intercept the URL given and then depending on a parameter serve a specific page.
The purpose would be that no matter the url if the last part of the url had say '/blah' the page I wanted would display.
ex 1: http://website/index.php/blah/
ex 2: http://website/index.php/blogcategory/articlex/blah/
ex 3: http://website/index.php/blogcategory/article5/blah/
Would all show the same article.
Thanks,
Mat
You need a plugin that is triggered 'onAfterInitialise'. Have a look at:
http://docs.joomla.org/Plugin/Events/System#onAfterInitialise
The code you need for your function would be something like (not tested):
/**
* Do something onAfterInitialise
*/
function onAfterInitialise()
{
// check for occurrence of string in url
$findme = 'blah';
$myuri = JRequest::getURI();
$tocheck = strpos($myuri, $findme);
if ($tocheck === true) {
$app = JFactory::getApplication();
$app->redirect('/anywhereyouwant');
}
}
Related
This listener sends me reports on all kinds of exceptions that occur on the website. Sometimes I get reports of images that have been deleted but are still consulted by search engines and others.
I want to do, instead of displaying an error message " 404 Not Found " return the correct image. To do this I created a database table that stores the old links and new links of the images that have been deleted, moved or changed its name.
then, this listener find in db the links to fallen and gets the new links of images . The goal is to return the image as http-response with header content-type as image.
My code is:
class ExceptionListener
{
private $service_container;
private $router;
function __construct(Container $service_container, $router){
$this->service_container = $service_container;
$this->router = $router;
}
public function onKernelException(GetResponseForExceptionEvent $event){
$exception = $event->getException();
$request = $this->service_container->get('request');
...
$document_root = $request->server->get('DOCUMENT_ROOT');
$filename = realpath($document_root . '/'. '/path/to/new_image.jpg');
$response = new \Symfony\Component\HttpFoundation\Response();
$response->headers->set('Content-type', 'image/jpeg');
$response->headers->set('Content-Disposition', 'inline; filename="' . basename($filename) . '";');
$response->headers->set('Content-length', filesize($filename));
$response->sendHeaders();
$response->setContent(file_get_contents($filename));
return $response;
...
}
}
The following error occurs:
In the browser you can see a small box , it is as if trying to show the image but the image source could not be obtained . But if the same code is testing on controller , its working properly and the image is displayed .
What can I do to return image from a listener ? thanks
There's few things wrong about the code snippet from your question.
Firstly, you should never use the request service. It's deprecated since Symfony 2.4 and was removed in Symfony 3.0. Use the request stack (request_stack) instead.
Secondly, do not send the response yourself, but let the framework do it. Symfony events system is designed for flexibility (see the docs). In your case it's enough to set the response on the event object.
Finally, you don't need the service container to access the request at all, as it's available on the event.
Moreover, instead of the standard Response class you can use the BinaryFileResponse. It's purpose is to serve files (have a look at the docs).
You can greatly simplify your listener:
use Symfony\Component\HttpFoundation\BinaryFileResponse;
class ExceptionListener
{
private $router;
function __construct($router)
{
$this->router = $router;
}
public function onKernelException(GetResponseForExceptionEvent $event)
{
$exception = $event->getException();
// request is avialable on the event
$request = $event->getRequest();
// ...
$file = 'path/to/file.txt';
$response = new BinaryFileResponse($file);
// ... set response parameters ...
// finally, set the response on your event
$event->setResponse($response);
}
}
I really love the DropZoneJS component and am currently wrapping it in an EmberJS component (you can see demo here). In any event, the wrapper works just fine but I wanted to listen in on one of Dropzone's events and introspect the file contents (not the meta info like size, lastModified, etc.). The file type I'm dealing with is an XML file and I'd like to look "into" it to validate before sending it.
How can one do that? I would have thought the contents would hang off of the file object that you can pick up on many of the events but unless I'm just missing something obvious, it isn't there. :(
This worked for me:
Dropzone.options.PDFDrop = {
maxFilesize: 10, // Mb
accept: function(file, done) {
var reader = new FileReader();
reader.addEventListener("loadend", function(event) { console.log(event.target.result);});
reader.readAsText(file);
}
};
could also use reader.reaAsBinaryString() if binary data!
Ok, I've answer my own question and since others appear interested I'll post my answer here. For a working demo of this you can find it here:
https://ui-dropzone.firebaseapp.com/demo-local-data
In the demo I've wrapped the Dropzone component in the EmberJS framework but if you look at the code you'll find it's just Javascript code, nothing much to be afraid of. :)
The things we'll do are:
Get the file before the network request
The key thing we need become familiar with is the HTML5 API. Good news is it is quite simple. Take a look at this code and maybe that's all you need:
/**
* Replaces the XHR's send operation so that the stream can be
* retrieved on the client side instead being sent to the server.
* The function name is a little confusing (other than it replaces the "send"
* from Dropzonejs) because really what it's doing is reading the file and
* NOT sending to the server.
*/
_sendIntercept(file, options={}) {
return new RSVP.Promise((resolve,reject) => {
if(!options.readType) {
const mime = file.type;
const textType = a(_textTypes).any(type => {
const re = new RegExp(type);
return re.test(mime);
});
options.readType = textType ? 'readAsText' : 'readAsDataURL';
}
let reader = new window.FileReader();
reader.onload = () => {
resolve(reader.result);
};
reader.onerror = () => {
reject(reader.result);
};
// run the reader
reader[options.readType](file);
});
},
https://github.com/lifegadget/ui-dropzone/blob/0.7.2/addon/mixins/xhr-intercept.js#L10-L38
The code above returns a Promise which resolves once the file that's been dropped into the browser has been "read" into Javascript. This should be very quick as it's all local (do be aware that if you're downloading really large files you might want to "chunk" it ... that's a more advanced topic).
Hook into Dropzone
Now we need to find somewhere to hook into in Dropzone to read the file contents and stop the network request that we no longer need. Since the HTML5 File API just needs a File object you'll notice that Dropzone provides all sorts of hooks for that.
I decided on the "accept" hook because it would give me the opportunity to download the file and validate all in one go (for me it's mainly about drag and dropping XML's and so the content of the file is a part of the validation process) and crucially it happens before the network request.
Now it's important you realise that we're "replacing" the accept function not listening to the event it fires. If we just listened we would still incur a network request. So to **overload* accept we do something like this:
this.accept = this.localAcceptHandler; // replace "accept" on Dropzone
This will only work if this is the Dropzone object. You can achieve that by:
including it in your init hook function
including it as part of your instantiation (e.g., new Dropzone({accept: {...})
Now we've referred to the "localAcceptHandler", let me introduce it to you:
localAcceptHandler(file, done) {
this._sendIntercept(file).then(result => {
file.contents = result;
if(typeOf(this.localSuccess) === 'function') {
this.localSuccess(file, done);
} else {
done(); // empty done signals success
}
}).catch(result => {
if(typeOf(this.localFailure) === 'function') {
file.contents = result;
this.localFailure(file, done);
} else {
done(`Failed to download file ${file.name}`);
console.warn(file);
}
});
}
https://github.com/lifegadget/ui-dropzone/blob/0.7.2/addon/mixins/xhr-intercept.js#L40-L64
In quick summary it does the following:
read the contents of the file (aka, _sendIntercept)
based on mime type read the file either via readAsText or readAsDataURL
save the file contents to the .contents property of the file
Stop the send
To intercept the sending of the request on the network but still maintain the rest of the workflow we will replace a function called submitRequest. In the Dropzone code this function is a one liner and what I did was replace it with my own one-liner:
this._finished(files,'locally resolved, refer to "contents" property');
https://github.com/lifegadget/ui-dropzone/blob/0.7.2/addon/mixins/xhr-intercept.js#L66-L70
Provide access to retrieved document
The last step is just to ensure that our localAcceptHandler is put in place of the accept routine that dropzone supplies:
https://github.com/lifegadget/ui-dropzone/blob/0.7.2/addon/components/drop-zone.js#L88-L95
using the FileReader() solution is working amazingly good for me:
Dropzone.autoDiscover = false;
var dz = new Dropzone("#demo-upload",{
autoProcessQueue:false,
url:'upload.php'
});
dz.on("drop",function drop(e) {
var files = [];
for (var i = 0; i < e.dataTransfer.files.length; i++) {
files[i] = e.dataTransfer.files[i];
}
var reader = new FileReader();
reader.onload = function(event) {
var line = event.target.result.split('\n');
for ( var i = 0; i < line.length; i++){
console.log(line);
}
};
reader.readAsText(files[files.length-1]);
I'm using Hybridauth social login, and upon a user authenticating with Facebook, I receive the following error:
Warning: array_key_exists() [function.array-key-exists]: The second
argument should be either an array or an object in
/hybridauth/Hybrid/thirdparty/Facebook/base_facebook.php on line 1328
My guess (probably wrong) to why this may be happening is because the parameters used to pass to Hybridauth come from the browser URL, and I have two - page=register & connected_with=facebook. Hybridauth only requires the second one...
It actually authenticates, but I want rid of this error. Why does this warning occur? Is there a way to hide it?
This is the bit that errors:
/**
* Get the base domain used for the cookie.
*/
protected function getBaseDomain() {
// The base domain is stored in the metadata cookie
// if not we fallback to the current hostname
$metadata = $this->getMetadataCookie();
if (array_key_exists('base_domain', $metadata) &&
!empty($metadata['base_domain'])) {
return trim($metadata['base_domain'], '.');
}
return $this->getHttpHost();
}
It's this code the warning comes from:
/**
* Destroy the current session
*/
public function destroySession() {
$this->accessToken = null;
$this->signedRequest = null;
$this->user = null;
$this->clearAllPersistentData();
// JavaScript sets a cookie that will be used in getSignedRequest
// that we need to clear if we can
$cookie_name = $this->getSignedRequestCookieName();
if (array_key_exists($cookie_name, $_COOKIE)) {
unset($_COOKIE[$cookie_name]);
if (!headers_sent()) {
$base_domain = $this->getBaseDomain();
setcookie($cookie_name, '', 1, '/', '.'.$base_domain);
} else {
// #codeCoverageIgnoreStart
self::errorLog(
'There exists a cookie that we wanted to clear that we couldn\'t '.
'clear because headers was already sent. Make sure to do the first '.
'API call before outputting anything.'
);
// #codeCoverageIgnoreEnd
}
}
}
It looks like getMetadataCookie() does not always return an array, possibly because the cookie has not yet been set. You may want to check that it's actually an array before using it as such;
if (is_array($metadata) && array_key_exists('base_domain', $metadata) &&
For the added code, the same would apply to array_key_exists() in the new code. If you're unsure if it's actually set to an array if the cookie is not set, check first.
I'm having an issue with this route and not sure what my problem is exactly.
My page is located at http://www.kansasoutlawwrestling.com/kowmanager/pmsystem/viewmessage/1 where 1 is the message id.
I set up a route to look like
$route['pmsystem/viewmessage/(:num)'] = 'pmsystem/viewmessage/$1';
and I'm still getting a error message like this
A PHP Error was encountered
Severity: Warning
Message: Missing argument 1 for Pmsystem::viewmessage()
Filename: controllers/pmsystem.php
Line Number: 76
// View A Message
function viewmessage($message_id)
{
//Config Defaults Start
$msgBoxMsgs = array();//msgType = dl, info, warn, note, msg
$cssPageAddons = '';//If you have extra CSS for this view append it here
$jsPageAddons = '<script src='.base_url().'../assets/js/cpanel/personalmessages.js></script><script src='.base_url().'assets/js/mylibs/jwysiwyg/jquery.wysiwyg.js></script>';//If you have extra JS for this view append it here
$metaAddons = '';//Sometimes there is a need for additional Meta Data such in the case of Facebook addon's
$siteTitle = '';//alter only if you need something other than the default for this view.
//Config Defaults Start
//examples of how to use the message box system (css not included).
//$msgBoxMsgs[] = array('msgType' => 'dl', 'theMsg' => 'This is a Blank Message Box...');
/**********************************************************Your Coding Logic Here, Start*/
// Checks to see if a session is active for user and shows corresponding view page
if (!$this->loggedin->chkLoginStatus() === FALSE)
{
if( ! $this->uri->segment(3))
{
redirect('error', 'refresh');
}
}
else
{
redirect('login', 'refresh');
}
$bodyContent = 'viewpm';//which view file
$bodyType = "full";//type of template
/***********************************************************Your Coding Logic Here, End*/
//Double checks if any default variables have been changed, Start.
//If msgBoxMsgs array has anything in it, if so displays it in view, else does nothing.
if(count($msgBoxMsgs) !== 0)
{
$msgBoxes = $this->msgboxes->buildMsgBoxesOutput(array('display' => 'show', 'msgs' =>$msgBoxMsgs));
}
else
{
$msgBoxes = array('display' => 'none');
}
if($siteTitle == '')
{
$siteTitle = $this->metatags->SiteTitle(); //reads
}
//Double checks if any default variables have been changed, End.
$this->data['msgBoxes'] = $msgBoxes;
$this->data['cssPageAddons'] = $cssPageAddons;//if there is any additional CSS to add from above Variable this will send it to the view.
$this->data['jsPageAddons'] = $jsPageAddons;//if there is any addictional JS to add from the above variable this will send it to the view.
$this->data['metaAddons'] = $metaAddons;//if there is any addictional meta data to add from the above variable this will send it to the view.
$this->data['pageMetaTags'] = $this->metatags->MetaTags();//defaults can be changed via models/metatags.php
$this->data['siteTitle'] = $siteTitle;//defaults can be changed via models/metatags.php
$this->data['bodyType'] = $bodyType;
$this->data['bodyContent'] = $bodyContent;
$this->data['user_data'] = $this->users->getUserByUserId($this->session->userdata('user_id'));
$this->data['users'] = $this->loggedin->getUserList();
$this->data['personal_messages'] = array($this->pmmodel->getTotalMessages($this->session->userdata('user_id')), $this->pmmodel->getTotalUnreadMessages($this->session->userdata('user_id')), $this->pmmodel->getLast5Messages($this->session->userdata('user_id')));
$this->data['messages'] = array($this->pmmodel->getInboxMessages($this->session->userdata('user_id')), $this->pmmodel->getSentMessages($this->session->userdata('user_id')));
//$this->data['message_data'] = $this->pmmodel->getPmMessage($this->uri->segment(3));
$this->load->view('cpanel/index', $this->data);
}
UPDATE
// Checks to see if a session is active for user and shows corresponding view page
if (!$this->loggedin->chkLoginStatus() === FALSE)
{
if (!is_numeric($this->uri->segment(3)))
{
$this->data['message_data'] = 'Invalid message id!';
}
else
{
$this->data['message_data'] = $this->pmmodel->getPmMessage($this->uri->segment(3));
}
$bodyContent = 'viewpm';//which view file
}
else
{
redirect('login', 'refresh');
}
$bodyType = "full";//type of template
This route is unnecessary - it doesn't change anything.
$route['pmsystem/viewmessage/(:num)'] = 'pmsystem/viewmessage/$1';
You can remove that route. The problem is here:
function viewmessage($message_id) // no default value means it's required
{
// your code
}
Your controller methods literally accept user input as arguments (whatever's in the address bar). You always have to account for those required arguments not being present in CI controller methods.
function viewmessage($message_id = NULL)
{
if ( ! $message_id) show_404();
// your code
}
This will silence the errors and show a 404 if the required $message_id is not there. Additionally, $this->uri->segment(3) is unnecessary because it should have the same value as $message_id.
I highly discourage redirecting to an error page when you really want a 404, but that's up to you. It sure doesn't help the user realize their mistake when the address is lost after the redirect, and you're sending the wrong HTTP headers by doing so.
Hello i am currently developing a kind of wiki system for my school, this system uses sub domains to find what course the wiki belongs to. example math1.wiki.com will be the course Math 1.
Now all these wikis use the same database and are given a wiki id, to find what data to load.
Here is the code i use to find the wiki id.
Global.asax
protected void Session_Start()
{
var database = new DataContext();
IWikiRepository rep = new WikiRepository(database);
IWikiService service = new WikiService(rep);
var domain = HttpContext.Current.Request.Url.Authority;
var port = "";
if (domain.Contains(':'))
{
var tmp = domain.Split(':');
domain = tmp[0];
port = tmp[1];
}
var split = domain.Split('.');
var subdomain = split[0];
// if (subdomain == "localhost")
// subdomain = "wiki1";
var wiki = service.GetSite(subdomain);
if (wiki == null)
{
Response.StatusCode = 404;
return;
}
Session["CurrentWiki"] = wiki;
}
This is all fine, but i want to make the mvc system send a 404 request if no wiki was found for the subdomain. But this can not only be done in session_start() as it only runs once per session i have therefor tryed using Application_BeginRequest, but sadly do i not have access to the sessions in the method.
Do any one know how i can implement this?
why can't you just make a custom function that you call at the start of the main page to determine if the wiki exists and if not, redirect/error page/whatever. If it's a custom function, you can just recall it when necessary.