I need to get the current servers name an all the other information stored in the URI.
In Vaadin 8 it was accessible thru the Page by calling something like this:
URI uri = Page.getCurrent().getLocation();
In Flow the Page does not contain such information:
An neither does the Router afaik.
How do I get the URI?
Thank you in advance.
Update Feb 2021
Since Vaadin 19 there is a new Page method called fetchCurrentURL which will actively poll the current url form the frontend.
see: commit
Old an potentially problematic workaround
The URI can be retrieved using this:
VaadinServletRequest req = (VaadinServletRequest) VaadinService.getCurrentRequest();
StringBuffer uriString = req.getRequestURL();
URI uri = new URI(uriString.toString());
There is no direct way of doing this, but a feature request is open for this case: https://github.com/vaadin/flow/issues/1897.
Related
Within my Owin Self hosted Web Api project I am trying to build a custom MediaTypeFormatter that inherits from BufferedMediaTypeFormatter.
But the problem is the HttpContent object passed into ReadFromStream(..) does not contain all the headers sent in the request.
How do you access ALL the headers that were sent in the request (I know this because I made the request), or access the original HttpRequestMessage in the ReadFromStream(..) method ?
This seams to be a major bug and I cannot think of any reason why all the Request headers are not provided.
Sounds like the ASP.NET Request object does not expose a property for the specific header field name you are looking for.
So it looks like first, you need the Request and to do that you might be able to override GetPerRequestFormatterInstance:
How do I retrieve the HTTP request method in an ASP.NET WebAPI MediaTypeFormatter?
Once you have the request object you can search for the specific header field name you are looking for like so:
IEnumerable<string> headerValues = request.Headers.GetValues("MyHeaderFieldName");
var id = headerValues.FirstOrDefault();
You can also get the raw request if needed:
Request.InputStream.Position = 0;
var input = new StreamReader(Request.InputStream).ReadToEnd();
I need to implement a web script that generates a returns the ticket for the current user. This web script is addressed by the URI I use to setup a URLConncetion. The ticket should be contained in the response body, which I need to evaluate in my JSP (or Java code) to extract the ticket. How can be done by a simple JavaScript / FreeMarker web script, using the JavaScript session root scope object to retrieve the ticket, i.e. session.getTicket() ?
Can any one pls write the steps to do?
ticket.get.html.ftl (or json or whatever you want):
${session.ticket}
I am trying to extract an id number from a URL using a web service so that it can be used as a parameter for a where clause in a select statement that produces data from a database based on the id number of a record. That data will then be passed back to the page to populate an element in a jQuery modal popup widow.
Everything works fine with a static id number (ex: string postid = "120"), but I don't know how to get the id number from the URL. I'm using Routing in .Net 4 and the method for accessing Routing in pages does not work in a web service. In pages I just do stuff like var id = RouteData.Values["id"]; and that gets the id, but when i did it in a web service I got an error:
CS0120: An object reference is required for the non-static field,
method, or property 'System.Web.Routing.RouteData.Values.get'
Summary:
I have web service accessed form a details page where I want to get RouteData for the page making the request. I want to do this just as easily as I can on a page using RouteData.Values which is just as easy as the now the obsolete Request.Querystring.
Now I am more confused because although I could easily add a new route for the web service I don't know I would call that using jQuery Ajax because of the webservice.asmx/webmethod syntax.
Right now I have URL: "../webservices/googlemaps.asmx/GetGoogleMap" in my jQuery Ajax, but that is not a real URL. It only exists in jQuery somewhere and the way to call the service using just JavaScript is no a real URL either, its webservice.webmethod() which in this case would be googlemaps.GetGoogleMap().
I will try registering a route for webservices/googlemaps.asmx/GetGoogleMap/postid, but I doubt it will work because GetGoogleMap is not a directory or a querystring.
Get current http request and use RequestContext property to get request context - it has current routing data. For example,
var id = HttpContext.Current.Request.RequestContext.RouteData.Values["id"];
In case of WCF based web service, make sure that service is participating in ASP.NET pipeline (see ASP.NET Compatibility)
EDIT: Sorry for misleading answer - the above will not work unless web service url is registered in routing engine. However, it may not solve your issue of retrieving the id - what kind of service implementation are you using? Are you making a GET request or POST request? Typically, web service handler (asmx) or WCF pipeline should convert GET/POST parameters to method parameters. Post your web service code and how you invoke it.
I have a admin page in asp.net that adds data to a database. This database is available as a JSON string to external websites, however, since it's a lot of data, the external websites cache this data locally.
I want to be able to ping the external websites to let them know the data has changed so they can referesh their cache. I figure I can setup an ASHX handler that receives a parameter telling them what data has changed, so they can both delete that data and refresh it.
The only part I'm not sure about is the best way to call this external page from my admin page. Do I just do a regular WebRequest and discard the result? or is there a simpler way to call a page from code when you don't need the response?
Basically I just want to "ping" this page, so it knows it needs to refresh.
thanks!
If you just want to call the remote page, you can use the WebRequest class.
http://msdn.microsoft.com/en-us/library/debx8sh9.aspx
WebRequest request = WebRequest.Create("http://my.domain.ext/page.ashx");
using(WebResponse response = request.GetResponse()) {
response.Close();
}
If you want to do more advanced stuff a webservice would be more appropriate.
You could have a flag set up in the database. That would turn this into a much simpler task.
If no alternative exists you can use the WebClient class:
using (var wc = new WebClient())
{
wc.DownloadString(address);
}
We have a Flex client and a server that is using the Spring/Blazeds project.
After the user logs in and is authenticated, the spring security layer sends a redirect to a new URL which is where our main application is located.
However, within the flex client, I'm currently using HTTPService for the initial request and I get the redirected page sent back to me in its entirety.
How can I just get the URL so that I can use navigatetourl to get where the app to go where it needs to?
Any help would greatly be appreciated. Thanks!
One solution would be to include a token inside a comment block on the returned page, for instance:
<!-- redirectPage="http://localhost/new-location" -->
then check for it's presence inside the HTTPService result handler. The token's value could then be used in your call to navigateToURL.
Another solution would be to examine the HTTP response headers and extract the value of the "Location" header using ActionScript. Consider using the AS3 HTTP Client lib.
From the examples page http://code.google.com/p/as3httpclientlib/wiki/Examples To determine the 'Location' header from the response:
var client:HttpClient = new HttpClient();
var uri:URI = new URI("http://localhost/j_security_check");
client.listener.onStatus = function(event:HttpStatusEvent):void {
var response:HttpResponse = event.response;
// Headers are case insensitive
var redirectLocation:String = response.header.getValue("Location");
// call navigateToURL with redirectLocation
// ...
};
// include username and password in the request
client.post(uri);
NOTE: AS3 HTTP Client depends on AS3 Core and AS3 Crypto libs.
You can also simply use the URLLoader class, no need for external code. One of the events it dispatches is HTTPStatusEvent.HTTP_RESPONSE_STATUS. Just plug into that and retrieve the redirected url:
urlLoader.addEventListener(HTTPStatusEvent.HTTP_RESPONSE_STATUS, onHTTPResponseStatus);
private function onHTTPResponseStatus(event:HTTPStatusEvent):void
{
var responseURL:String = event.responseURL;
}
I am (successfully) using this code right now, so if it doesn't work for some reason, let me know.