I'm developing a Windows Store App, and need to pass parameters to a x-ms-webview control in one page. The code (won't work, just for illustration) should look like:
In the webview host page:
element.querySelector('#webview').myArray= [1, 2, 3];
And in the web view content page:
var arr = window.external.mayArray;
I've tried to embed the parameters in 'src', or use webview.InvokeScriptAsync(). They seem work. But I guess if there is a better way to do this.
If you need the parameters to be available as the page is being loaded, the passing the values as a query string is the simplest option.
Otherwise:
Use invokeScriptAsync (reference) to call a function within the target document after the load has completed. While it delays the set longer than the query string, it's efficient and allows you to keep executing code and adjusting behavior long after the page has loaded. If you can't use the query string for some reason, I'd suggest this.
If the web application has a way to preload the values you need and store them in a Session, it may work, but requires more planning and careful timing.
Related
In my forward method, I need to have a param that is list:
forward(params:[selectedLicences:[1,2,3]]],action...)
Currently, when the same parameters are submitted through a form, I access them like this:
List<Long> licenses = params.list("selectedLicences").collect{it as Long}
Is it possible to use the same code when forwarding, or I need to have code that will process the resulting String [1,2,3] and change it into a list?
I have seen one solution is to use the flash storage, but I am looking for other alternatives as well.
Could not find a way to do it, so I am forwarding a list, which turns to string, and then I parse it back to list on receiving controller.. I am not working with large data (usually 2-3 values) so performance is not an issue in this case..
Dealing with some legacy code we came across a rather annoying situation. We are looping through a query with the <cfoutput query="x"> tag. That query has a column named 'url'. Within that loop we need to check if a key exists within the url scope. Since CF puts a priority on what's in the query over general page scopes I can't use a structKeyExists(url,"key") since as far as CF is concerned at this point, url is a string with the value from the current row of the query.
How can I break out of the query scope and inspect what's in my url?
As a temporary we are using isDefined("url.key"), but I would still like to know if there is a way to break out of the query scope.
Also can't really change the column, or even the column name in the query without a few hours of work tracking down an changing all references to it, so we're going to avoid that if at all possible.
EDIT:
There seems to be some confusion as to how this code is set up, and why the simple solutions don't apply. It would be hard for me to give a thorough example but I will try to clarify the situation.
There are many pages that would count as 'pageA' for the following example. Enough that changing how things work would require a change in scope and investment in time that's just not going to happen in the time allotted.
PageA runs a query with one of the columns being named url, then starts an output loop via cfoutput, inside that loop PageB is included. One PageA may have different variables in the URL scope than another PageA, actually they are the same, but may be named differently(varID=x in one case vid=x in another). Inside of PageB I need to use the value from that url scope, so I want to run through the different possible names (if key 'varID' exists in url, use it, otherwise use 'vid').
This is why I want to "punch through" the query scope to get the url structure, and not the url column from the query. Any other method seems to require modifying the many PageAs.
So the question is not how to solve this problem specifically, as there are many ways to do it, I would just really like to avoid them as they all add a lot of time in implementation and testing. The question remains, is there a way to access the url scope as a variable if url exists as a query column and you are in the query scope.
I thought it might work to create a function that returned the url scope, but upon testing it, even with a local-scoped query (which prevents the function using the query itself) the use of url inside the function is still corrupted:
<cffunction name="getUrlScope"><cfreturn Url /></cffunction>
...
<cfoutput query="x">
<cfif StructKeyExists( getUrlScope() , 'key' )>
<!--- still fails :( --->
There is however an undocumented (meaning unsupported and liable to change) option. If you dump getPageContext() you will see a bunch of functions that do interesting things, including dealing with scopes.
You can use getPageContext().SymTab_findBuiltinScope('URL') to get at the URL scope.
You can also use getPageContext().getCfScopes() to get an array of scopes. I'm not sure if the order is guaranteed fixed but it seems to be [cgi,?,url,form,cookie,?] checking on both CF10 and cflive (CF9), so possibly is.
(In CF8 there was the method getBuiltinScopes, which returned a struct instead of an array - this no longer appears to exist, reinforcing the whole unsupported and changeable nature of these methods.)
On Railo those don't work, but there is getPageContext.UrlScope() and similarly-named functions for the other scopes.
One solution would be to assign the url struct to a new variable outside of the cfoutput tag and then reference that variable instead of url. Example:
<cfset urlScope = url>
<cfoutput query="x">
<cfset keyExists = structKeyExists(urlScope, "key")>
</cfoutput>
My solution for this is always to alias the url column in the query as int
SELECT URL as qURL FROM myTable ...
IF you don't have access to the query (it's a stored precedure or used elswhere etc) you can always use query of a query to reselect it with your alias.
I don't care for the idea of creating a separate reference to URL outside the output - but that would also work. I just want to KNOW what is user input (i.e. comes from the URL or FORM) and what is generated internally (i.e. comes from a query).
Couldn't you move structKeyExists(url,"key") outside of the cfoutput block, and store that into a variable? Or do a structAppend to copy the url struct into another struct named something else?
Another approach is to replace your cfoutput block with a cfloop block.
<cfloop from="1' to = "#YourQuery.recordcount#" index = "idx">
<cfif StructKeyExits(url,"key")>
<cfoutput>
#url.key# is not the same as #YourQuery.url[idx]#
which can also be referenced like this #YourQuery["url"][idx]
etc
I'm trying to build an addon that will observe and collect XHR and image responses received on a page and make them available to page script (on that page) for further inspection.
In my 'http-on-examine-response' observer code, I push URLs I'm interested in, into an array for their associated window, into an object, something like this -
myWindowId = resp.outerWindowID+'-'+resp.currentInnerWindowID;
storedResponses[myWindowId].push(subject.URI.spec);
(I thought that approach may be better than using tab references to identify unique source windows)
The relevant arrays are updated automatically as any page makes a request.
I'd like to be able to query the relevant array from page script or a bookmarklet at any time.
Should I set up port.on..., or postMessage() communication between the page/bookmarklet, content script and extension, or use a pageMod to write the appropriate array directly to an unsafeWindow global object on the relevant page?
I couldn't figure out how to make a pageMod write a specific array to a specific page as soon as the new responses were observed.
Full source is here -
https://builder.addons.mozilla.org/addon/1064905/latest/
I think it's all working, apart from getting the data back on to the page.
With help from Wladimir Palant, I found that XPCNativeWrapper.unwrap() is defined and does what I needed from the SDK module context. It allowed me to set variables directly in a window from my addon.
More info about wrappers here -
https://developer.mozilla.org/en/XPCNativeWrapper
I am using ColdFusion 9.0.1.
I have a new web site that uses Bikes.cfm and Makers.cfm as template pages. I need to be able to pass BikeID and MakerID to both of the these pages, along with other variables. I don't want to use the Actual page name in the URL, such as this:
MyDomain.com/Bikes.cfm?BikeID=1234&MakerID=1234
I want my URL to look more like this:
MyDomain.com/?BikeID=1234&MakerID=1234
I need to NOT specify the page name in the URL.
I want these two URLs to access different data:
MyDomain.com/?BikeID=1234&MakerID=1234 // goes to bike page
MyDomain.com/?MakerID=1234&BikeID=1234 // goes to maker page
So, if BikeID appears in the URL before MakerID, go to the Bikes.cfm page. If MakerID appears before BikeID, go the Makers.cfm page.
Is there an easy and existing method to arrange the URL keys in such a way to have them point to the appropriate page?
Should I just parse the the URL as a list and determine the first ID and go to the appropriate page? Is there a better way?
Any thoughts or hints or ideas would be appreciated.
UPDATE -- It certainly appears that using the order of parameters in a URL is a bad idea for the following reasons:
1) many programs append variables to the URL
2) some programs may reorder the variables
3) GoogleBot may not consider order relevant and will most likely not index the site correctly.
Thanks to everyone who provided advice in a positive manner that my approach was probably a bad idea and would not produce the results I wanted. Thanks to everyone who suggested alternate means to produce the results I wanted.
If anyone of you positive people would like to put your positive comment/advice as an answer, I'd be happy to accept it as the answer.
Despite my grave misgivings about the whole idea, here's how I would do it if I were forced to do so:
index.cfm:
<cfswitch expression="#ListFirst(cgi.query_string, '=')#">
<cfcase value="BikeID">
<cfinclude template="Bikes.cfm">
</cfcase>
<cfcase value="MakerID">
<cfinclude template="Makers.cfm">
</cfcase>
<cfdefaultcase>
<cfinclude template="Welcome.cfm">
</cfdefaultcase>
</cfswitch>
In my layout, I'm calling include_javascripts() in my <head></head> section. Later on in my layout, I'm calling a component which makes use of use_javascript(), but, unfortunately, the javascript has been output, so this request falls on deaf ears.
I can think of a few approaches:
Put the call to `include_javascripts()` at the bottom.
At the moment I can't do this, because I'm using a CMS on top of symfony which uses a lot of inline javascript.
Override the include_javascript helper, or create a new one, which adds doesn't add anything, but adds it adds to a queue that a filter will take care of after rendering the page.
This is sort of like the common filter which was removed from 1.2. Obviously, they don't seem to like this approach.
Are there any other alternatives?
The use_javascript function simply adds the specified script to a collection, which is output by the include_javascripts function.
In order to have inline javascript in your code, you will need to use tags, since the use_javascript is pointless unless include_javascripts is called afterwards.
If you do not want to deal with filenames and such, you could always use sfConfig::get('sf_root_dir') . js/filename.js to grab your file.