I Couldn't find any class/method which gives me access to the referrer header in GWT.
anyone knows about this?
See
Document.get().getReferrer()
Since you can't get the headers in javascript, I don't think you can get them in a GWT client either: Accessing the web page's HTTP Headers in JavaScript
Update:
Maybe you can update login.php to write out the referrer to a hidden input tag, maybe something like this:
<input type="hidden" name="referrer" name="referrer" value="<?php Print referrer_value ?>">
Then, in gwt you should be able to get the value using something like this:
InputElement elt = (InputElement)Document.get().getElementById("referrer")
String referrer = elt.getValue()
Note: This is untested code, and I'm not even sure that is valid php, but hope this helps!
I had the same question, but I made some changes to charge the header link tag dinamically.
I used this code:
LinkElement link = Document.get().createLinkElement();
link.setHref("css/home.css");
I don't know if is the most graceful solution, but it works!
EDIT:
If you need to modify any current element you should to do this:
NodeList<Element> links = Document.get().getElementsByTagName("link");
for(int i = 0; i < links.getLength(); i++){
LinkElement l = (LinkElement)links.getItem(i);
if( l.toString().contains("href_to_replace.css") ){
l.setHref("new_href.css");
break;
}
}
You can access to the referrer in JavaScript and pass it to Java (rather to the JavaScript compiled from Java). You need to define a JSNI (JavaScript Native Method) method in Java with a JavaScript definition. This code can access the document and window objects of the browser, although you need to respectively use $doc and $wnd variables for that purpose.
More info at
https://developers.google.com/web-toolkit/doc/latest/DevGuideCodingBasicsJSNI
You can get the full URL String like so:
String url = Document.get().getURL();
get the index of a question mark and parse it by yourself
Related
I have such url - http://www.coolsite.com/daily-plan/#id=1
What the easiest way to parse that string and read a hash value (the value after #id=)?
Thank you
On client side (i.e. from JavaScript) you can check window.location.hash to get hash. On server side, general answer is 'it is impossible' since hash is not sent in request to server.
Upd: I maybe misunderstood the question. My answer is about how to get hash part of url either in browser or in server side code during request processing, not about string processing.
Upd2: Answer to comment here because it doesn't fit in comment.
How does it work when user clicks on your navigational links?
I assume hash is changed and corresponding content is downloaded via AJAX request from web service or REST.
For example if your user has URL www.example.com in his browser and this page shows a list of product categories. User clicks one category and URL changes to www.example.com/#id=5 and products from that category(with ID=5) are downloaded via AJAX and shown on the page. No postback, only partial page refresh.
Is this close to your scenario?
Now you want user to paste/enter www.example.com/#id=5 directly in the browser address bar and go directly to list of products in that category.
But /#id=5 is not sent to server with request by the browser, so there is no way to get that value on server side, and you can do nothing about it since it is the browser decided not to send this data and you don't have it on server side.
In our project we use solution when server returns only common page code/html, i.e. header, footer, without main/center part of the page. Then there is a JavaScript code which executes right after this common HTML loaded. It takes window.location.hash and sends it to web service via AJAX and web service returns content (HTML) for the main part of the page.
new URI("http://.../abc#xyz").getFragment();
See the Javadocs for URI
Here is how to capture anchor links. Works across all web frameworks.
I'll use an example scenario to illustrate: let's say we need to capture a deep URL http://server.com/#/xyz requested by an unauthenticated user so that they can be redirected to that deep URL post-login.
The unauthenticated user requests http://server.com/#/xyz (everything from the '#' onwards is not sent to the server).
All the server knows is that the user wants http://server.com/ and that they are unauthenticated. Server redirects the user to a login form.
Here's the clever bit: the client is still waiting on their original request so if the server includes a hidden element in the login form with some JS that references window.location.href, it can capture the full URL of the original request complete with the anchor portion:
<form action="/login" method="post">
<div>
<label>Username:</label>
<input type="text" name="username"/><br/>
</div>
<div>
<label>Password:</label>
<input type="password" name="password"/>
</div>
<!-- XXXXXXXXX CLEVER BIT XXXXXXXXXX-->
<script>
document.write('<input type="hidden" name="from" value="'+document.location.href+'"/>');
</script>
<!-- XXXXXXXXXX-->
<div>
<input class="submit-button" type="submit" value="Submit"/>
</div>
</form>
The user authenticates themself and the original URL is sent with the POST. The server can then relay the user to the original deep URL.
String url = " http://www.coolsite.com/daily-plan/#id=1";
int sharpPos = url.indexOf('#');
String q = null;
if (sharpPos >= 0) {
q = url.substring(sharpPos);
}
Surely you can use various methods of string manipulation including regular expressions.
But actually your example is strange. Typically parameters of URL are passed after question mark. In this case you can just use standard class URL:
String q = new URL(" http://www.coolsite.com/daily-plan?id=1").getQuery();
what you are using to do this ?
If you are using jsp or servlet following will be useful to you
if (request.getParameter("#id") == null) {
out.println("Please enter your name.");
} else {
out.println("Hello <b>"+request.getParameter(i)+"</b>!");
}
If you are using javascript for it following function will be useful to you
function getURLParameters()
{
var sURL = window.document.URL.toString();
if (sURL.indexOf("?") > 0)
{
var arrParams = sURL.split("?");
var arrURLParams = arrParams[1].split("&");
var arrParamNames = new Array(arrURLParams.length);
var arrParamValues = new Array(arrURLParams.length);
var i = 0;
for (i=0;i<arrURLParams.length;i++)
{
var sParam = arrURLParams[i].split("=");
arrParamNames[i] = sParam[0];
if (sParam[1] != "")
arrParamValues[i] = unescape(sParam[1]);
else
arrParamValues[i] = "No Value";
}
for (i=0;i<arrURLParams.length;i++)
{
alert(arrParamNames[i]+" = "+ arrParamValues[i]);
}
}
else
{
alert("No parameters.");
}
}
REPLACE the '#' with '?' when parsing the url. Check the code below
String url = "http://www.coolsite.com/daily-plan/#id=1";
String urlNew = url.replace("#", "?");
String id = Uri.parse(urlNew).getQueryParameter("id");
If you URL will the same as you write and doesn't contains anythins else then whis code on Java will help you
String val = "http://www.coolsite.com/daily-plan/#id=1";
System.out.println(val.split("#id")[1]);
Don't forget check to null value.
P.S. If you use servlet you can get this parameter from request.getAttribute("id").
With best regards,
Psycho
if your url get from OAuth callback,then you can't!
because the full url won't send to service because of hash(#)
I am new to Scala/Play Framework.
Currently, I am trying to call a Scala function from my html page: test.scala.html and pass the hash parameters to the Scala function.
I added the following lines to routes:
GET /hello controllers.Application.test
POST /hello controllers.Application.hello
In my test.scala.html I have:
#params = { window.location.hash }
#helper.form(action = routes.Application.hello) {
}
And my hello function is defined as:
def hello() = Action {
Ok("Hello !")
}
I am completely confused by the concept of routing and # so I am not too sure which part I did right and which part I did wrong. Please point out my mistakes.
Thanks in advance.
If the function is returning an action, not content to be displayed formatted inside view (HTML), you may want to route request to this action, from a link click or a form submit, to url configured in routing (aka /hello).
To add a parameter you need to either add it as url query string (e.g. for a link → /hello?p=1), or with an input/field for a form (e.g. <input type="text" name="p" value="1" />).
You can use reverse routing to get URL to call configured action. For example for a form POST to hello: <form action="#routes.MyController.hello()" method="POST">.... In this case you will need to look at form mapping, to extract parameters from request.
1) Concept of routing
The main purpose of this routing is simply to translate each incoming HTTP request to an Action in any of your Controller. By Reverse Routing its simply let you use the right part, controllers.Application.hello, in your HTML/Controller/else.
So, for your 2 URLs above, it's likely to say that if there is a request /hello with method GET then it will go to Application controller and test method. If you don't understand the role of each Routing method, please read this documentation..
2) the magic # character
# is a character that you can use in your HTML file if you need to use the Scala code or variables. It's like you can combine PHP code in your HTML file, if you're a PHP developer.
Here is the full-documentation of what you can do with this # character.
3) pass the hash to the controller
To this specific case the simplest way would be passing the value trough a form:
#helper.form(action = routes.Application.hello) {
#helper.inputText(myForm("username"), 'id -> "username", 'size -> 30, 'value -> 'value here' )
}
However, if you're a new Play developer, then I'm afraid you need to read about Form Submission and Form Helper in Play Framework..
Using the form api, I'm to display the result of some processing after a post is sent by a form.
So I implement the module_name_submit(...) method:
function cmis_views_block_view($delta = '') {
$cmisview = cmis_views_load($delta);
$block['content'] = cmis_views_info($cmisview);
return $block;
}
The processing is very simple. The call happens properly and I would like to display the $block on screen.
Returning this doesn't help. Maybe a redirect could help, but I'm looking first for something equivalent to drupal_set_message() but that dispays html in the page.
Any leads welcome :-)
Thanks,
J.
You probably need to use $form_state['redirect']
Put the content in a session variable, redirect to that page and have a custom block output that specific variable in the $content
How can we fetch the value of folders from below mentioned url:
http://my.indiamart.com/cgi/my-enquiries.mp#folders=1
I've tried CGI object, %ENV variable and so many things, but still not been able to get it.
Please suggest..
You can't, the browser interprets the fragment (#folders=1) without sending it to the server. So if http://my.indiamart.com/cgi/my-enquiries.mp is your script, then it will never see the #folders=1 part of the URL as the browser won't send it. If you need the fragment on the server then you'll have to change it to a CGI parameter:
http://my.indiamart.com/cgi/my-enquiries.mp?folders=1
or embed it in the URL path, something like one of these:
http://my.indiamart.com/cgi/my-enquiries.mp/1
http://my.indiamart.com/cgi/my-enquiries.mp/folders=1
You can't, # is recognized by JavaScript only,
apache will ignore this, that's the reason it does not contains any value in ENV variable.
You can use JavaScript: window.location.hash to capture this hash value.
Only with javascript.
You can use something like that to redirect to another script
<script>
if(window.location.hash) {
var str = window.location.hash.substring(1);
window.location.href = 'http://other_script.pl?param=' + str;
}
</script>
I am developing a website using zend framework.
i have a search form with get method. when the user clicks submit button the query string appears in the url after ? mark. but i want it to be zend like url.
is it possible?
As well as the JS approach you can do a redirect back to the preferred URL you want. I.e. let the form submit via GET, then redirect to the ZF routing style.
This is, however, overkill unless you have a really good reason to want to create neat URLs for your search queries. Generally speaking a search form should send a GET query that can be bookmarked. And there's nothing wrong with ?param=val style parameters in a URL :-)
ZF URLs are a little odd in that they force URL parameters to be part of the main URL. I.e. domain.com/controller/action/param/val/param2/val rather than domain.com/controller/action?param=val¶m2=val
This isn't always what you want, but seems to be the way frameworks are going with URL parameters
There is no obvious solution. The form generated by zf will be a standard html one. When submitted from the browser using GET it will result in a request like
/action/specified/in/form?var1=val1&var2=var2
Only solution to get a "zendlike url" (one with / instead of ? or &), would be to hack the form submission using javascript. For example you can listen for onSubmit, abort the submission and instead redirect browser to a translated url. I personally don't believe this solution is worth the added complexity, but it should perform what you're looking for.
After raging against this for a day-and-a-half, and doing my best to figure out the right way to do this fairly simple this, I gave up and did the following. I still can't believe there's not a better way.
The use case that necessitates this is a simple record listing, with a form up top for adding some filters (via GET), maybe some column sorting, and Zend_Paginate thrown in for good measure. I ran into issues using the Url view helper in my pagination partial, but I suspect with even just sorting and a filter-form, Zend_View_Helper_Url would still fall down.
But I digress. My solution was to add a method to my base controller class that merges any raw query-string parameters with the existing zend-style slashy-params, and redirects (but only if necessary). The method can be called in any action that doesn't have to handle POSTs.
Hopefully someone will find this useful. Or even better, find a better way:
/**
* Translate standard URL parameters (?foo=bar&baz=bork) to zend-style
* param (foo/bar/baz/bork). Query-string style
* values override existing route-params.
*/
public function mergeQueryString(){
if ($this->getRequest()->isPost()){
throw new Exception("mergeQueryString only works on GET requests.");
}
$q = $this->getRequest()->getQuery();
$p = $this->getRequest()->getParams();
if (empty($q)) {
//there's nothing to do.
return;
}
$action = $p['action'];
$controller = $p['controller'];
$module = $p['module'];
unset($p['action'],$p['controller'],$p['module']);
$params = array_merge($p,$q);
$this->_helper->getHelper('Redirector')
->setCode(301)
->gotoSimple(
$action,
$controller,
$module,
$params);
}