I'm using GWT to dynamically load html snippets from php script. I define the snippet i want the php script to return in the url (test.php?snippet=1). Now in GWT i have a function "getSnippet(int snippet id)" that uses a RequestBuilder to retrieve the snippet. It works perfectly fine, but it bothers me that i have to create a new RequestBuilder everytime getSnippet gets called. I'd rather have one ReqestBuilder and just change the url when getSnippet is called...
Is there a way to do this ?
Thank you !
In looking at the source code, I can't see a good reason why they are doing this. I would like to think that the GWT developers decided to leave out the setUrl method for a reason and included it in the constructor instead.
If you really want to do it, one way around this would be to extend the class and add a setUrl(String url) method. Modify all your current uses of RequestBuilder to use your newly extended class and see if anything breaks.
Related
I come from the procedural PHP and am learning OOP with Laravel. What I learned so far is very interesting and will ease my developer's life (it's not my job btw).
So, for all my websites, I am using a slug property for all articles, categories, and so on.
I started to use the "str_slug" provided by Laravel which seems to do the job at 99%. The issue I get is when I have such title (in french): "J'ai mangé une pomme", the slug string I get is: "jai-mange-une-pomme" which, in french, is not correct. I would like "j-ai-mange-une-pomme".
It's not really an issue. I can do:
$slug = str_replace('\'','_',$input['name']);
$slug = str_slug($slug, '-');
It suits me well but I wonder how to use anytime I want to use it. I don't want to write it again and again and again.
In procedural, it's easy, I would write a function, such as thePerfectSlug(){} in a helpers.php file (still an example) and will use an include at the top of my index.php. That would do the job.
But in OOP and especially in Laravel (5.1), how can I do that?
Thanks
You still can achieve it with normal function. Laravel uses his own function which are stored in helpers.php file. You can make your own helpers.php file and add it to your main composer.json file at autoload.files.
If you would like to do it in OOP way, create a trait like App\Traits\Sluggify with your method and use it in any class that needs it.
I am using codeigniter for a project that is used by a variety of companies.
The default version of our software is up and running and works fine - however some of our customers want slightly different view files for their instance of the system.
Ideally what I would like to do is set a variable (for example VIEW_SUFFIX) and whenever a view file is loaded it would first check if there was a suffix version available if there was use that instead.
For example if the system had a standard view file called 'my_view.php' but one client had a VIEW_SUFFIX of 'client_1' - whenever I called $this->load->view('my_view') if the VIEW_SUFFIX was set it would first check if my_view_client_1 existed (and if it did use that) or if not use the default my_view.php.
I hope that my question is clear enough... If anyone has done this before or can think of a way to do it I would really appreciate it.
EDIT:
Ideally I would like a solution that works without me changing every place that I am calling the view files. Firstly because there are a few files that may want different client versions and also because the view files are called from a lot of controllers
I had a similar requirement for which I created a helper function. Among other things, this function can check for a suffix before loading the specified view file. This function can check for the suffix and check if the file exists before loading it.
Unfortunately, the file checking logic would be a bit brittle. As an alternative, you can implement a MY_Loader class that will override the basic CI_Loader class.
Something like this in your application/core/MY_Loader.php:
class MY_Loader extends CI_Loader {
protected function _ci_load($_ci_data)
{
// Copy paste code from CI with your modifications to check prefix.
}
}
Could you not do this
// some method of creating $client
// probably created at login
$_SESSION['client'] = 'client_1';
$client = (isset($_SESSION['client'])) ? $_SESSION['client'] : '';
$this->load->view("your_view{$client}", $data);
I'm working on a way for users to be able to generate PDF copies of invoices and other tabular data. To do this, I've wrapped dompdf into a library that I can use with CI and created a method that will generate a PDF based on the return value of CI's output->get_output(). The wrapper is similar to this one on Github.
The problem is, I can't figure out a way to get the view (and HTML/CSS needed for the PDF) into CI's output class other than load->view(), which is going to write to the browser.
My only other choice would be to use curl to request the page, but that seems so silly to do since I can get it right from the output buffer. I just don't want the HTML sent to the browser, since I set headers telling the browser to expect a PDF.
To be clear, this is what I want to accomplish (in the order that I want to accomplish it):
Do everything I'd normally do to prepare the view for display
Load the view into the CI output class, but not display it
Pass the return value of output->get_output() to my dompdf library
Set the appropriate headers
Execute my dompdf method that will send the PDF to the browser
I don't see any way of doing step 2 based on the output class documentation.
Is it possible to get a view into the output class without displaying it? If so, how? I'm using CI 2.0.3.
Edit
The very helpful Anthony Sterling pointed out that I can just get what I want from the loader class by setting the third argument telling it to return a string rather than render the view to TRUE. E.g.:
$lotsaHtml = $this->load->view('fooview', $somearray, TRUE);
And that would be better in my particular instance since I don't need to load partials. However, this is still a valid and (I think) interesting question, it would also be handy to know if I could get the same from the OB, perhaps if I did have a bunch of partials. Those could be concatenated, but yuck.
It seems like I should be able to get the output class to not render anything (else, why does get_output() exist?) so I can do something else with everything it knows about. I just can't find a way to make that happen.
Edit 2
Some pseudo (but not far from reality) code illustrating what I hope to do, by showing what I did and then explaining what I actually wanted to do.
Let's say I have a public method genpdf($id) in a controller named invoice using a model named inv:
public function genpdf($invoiceId) {
$this->load->library('dompdflib');
$this->pagedata['invoice_data'] = $this->inv->getInvoice($invoiceId);
$html = $this->load->view('pdfgen', $this->pagedata, TRUE);
$this->dompdflib->sendPdf($html);
}
That is almost identical to code that I have that works right now. There, I ask the loader to parse and give me the results of the pdfgen view as a string, which I pass to the function in my dompdf wrapper that sets headers and sends the PDF to the browser.
It just seemed like this would be easy to do by just getting the output buffer itself (after setting headers correctly / etc).
Or do I just have to call the output class append_output() in succession with every partial I load?
Multiple methods loading a plethora of models need to work together to generate these (they're going in as an afterthought), so I was hoping to just collect it all and retrieve it directly from the output class. It could be that I just have to talk gradually to output->append_output() to make that happen.
...so - do I understand correctly - you want to get the whole final output (not just the view) as a string AND not display it to the user? Why dont you just overload the controllers _output() function?
class Your_controller extends CI_Controller
{
function stuff()
{
// do whatever - prep $data etc
$this->load->view('your_view', $data);
}
function _output($output)
{
// send $output to your library - get results blah blah
$result_pdf_file = $this->your_pdf_library_generator($output);
// Show something else to the user
echo "hi - I'm not what you expected - but here is your PDF";
echo $result_pdf_file; // or something like that
}
}
This means you can send ANYTHING you like to the output class - but nothing is displayed except what you want.
There are ways to improve this idea (i.e. hooks, variables to turn output on/off etc) - but the simplest would be to have this controller specifically for your pdf_generation command.
I don't see any way of doing step 2 based on the output class documentation. Is it possible to get a view into the output class without displaying it? If so, how? I'm using CI 2.0.3.
The controller _output() documentation is actually in the CI controller documentation, which is why it eluded you.
I'm using a really basic library in Codeigniter. In order to use it I need to pass in a number of config parameters using a config function. My library currently requires me to instantiate it before I can call the config, i.e., I have to use it as below:
$this->load->library('Library');
$instance = new Library();
$instance->config($configparams);
I'd like to use it like standard CodeIgniter libraries:
$this->load->library('Library');
$this->library->config($configparams);
What do I need to add to the library in order to have it auto-instantiate? The code is as below:
class Library {
function config($configparams){
...
}
}
This is working now. I swear it wasn't working before I posted on SO! Thanks for posts.
Once you load a class
$this->load->library('someclass');
Then when use it, need to use lower case, like this:
$this->someclass->some_function();
Object instances will always be lower case
According to the docs, you should just call it. So:
$this->load->library('Library');
$this->library->config($configparams);
But why not just pass $configparams to the constructor:
$this->load->library('Library', $configparams);
Check out the guide for CodeIgniter -- it's a great resource to learn more about the framework. IMHO, there aren't any good books available on the current version; this is it.
You basically call it like anything else.
$this->load->library('Name of Library')
Read more here: http://www.google.com/url?sa=t&source=web&cd=2&ved=0CCIQFjAB&url=http%3A%2F%2Fcodeigniter.com%2Fuser_guide%2Fgeneral%2Fcreating_libraries.html&ei=tLFUTbz3HI3SsAOYgP2aBg&usg=AFQjCNFo751PYFp5SbqzuZMxGhXwMI8SJA
Is it possible to call a php class function DIRECTLY using ajax?
Something like below... except ajax...
myclass::myfunction();
I've been using the jquery library to work with AJAX.
$.get('control.php', {func: funcName, arg1: arg1});
The above is similar to what I'm trying to achieve MINUS the control.php;
I'm not sure if this is even possible, but I just thought it would be nice to skip the landing page (control.php) that recieves the funcName. I have a bunch of conditional statements that sort out what class function to run based on the funcName recieved.
It seems kind of silly to do this, to have a separate page just to handle function calls.
Is there a better way?
No.
If this were possible, it would be a gaping security hole.
No. You can't invoke a method directly that way.
You could use routing (like the technique used in CodeIgniter and CakePHP) but that's just syntactic sugar that does the same thing -- control your routes to actions.
It is not possible because of a simple reason. How should the AJAX knows, where to find the function. It needs to have a URL to locate the function so it doesn't work without a php file in between.
No for security reasons but there is no reason why you can't do something like this
function run($args){
//do stuff
}
echo run($_REQUEST);
//or
echo run($REQUEST['name']);