I have subclassed RazorViewEngine so I can check for Request.Browser.IsMobileDevice and add a special mobile identifier to the view file name for it to grab. However I can't access the Request object. What should I do?
You can use either the HttpContext.Current.Request or Context.Request. Although understand how that IsMobileDevice works. It uses a browser file which contains a list of known user agents. As soon as a new device is built, that list is outdated, but in some cases may still identify the device to be mobile correctly. The recommended way is to use 51Degrees or to connect to the services it encompasses directly.
Related
I want to create a straightforward extension for Firefox.
User hovers over some word on any page
Pull the dictionary definition of that word from a file inside the extension
Display it while still hovered
I am new to Firefox add-ons and WebExtensions, so here's what I'm wondering:
I want the dictionary file(s) used by the extension to be local, instead of referring to some online website each time.
Any given user might be interested in a different part of the entire dictionary (it contains entries in different languages, users might only want their own 1 or 2 languages) so I want to avoid forcing every user to download the entire dictionary base.
The way I have seen similar add-ons handle that before Firefox 5.* is that they offer the search-and-display add-on separately from the dictionary files which are each available as add-ons in their own right, only actually doing stuff if you have the master add-on installed.
However, none of those examples seem to have been updated for the WebExtensions API and do not support more recent versions of Firefox.
I have also been unable to find how to communicate between web extensions so far.
My question being, how can I share information between 2 or more coorperating extensions to achieve what I described.
And actually, if this seems really stupid for some reason I'm unaware of, do point out any more reasonable alternatives that allow me to handle the dictionary files separately from the main extension.
Possibly related questions I found:
Communicating between 2 Firefox Add-Ons (Cross-Extension Communication)
This one is from 2010 however, thus out of date as far as I could tell.
Mozilla Addon Development - Communicating between windows with different domains
Kind of a similar situation, but they want to pull the definitions from an online source, rather than a local one.
The closest thing I found on the Mozilla browser extension website is communicating between add-on and some native applications, not quite what I need I think.
Communicating between add-ons is a normal part of the functionality of runtime.sendMessage(), runtime.connect(), runtime.onMessage, and runtime.onConnect.
Both runtime.sendMessage() and runtime.connect() have as their optional first parameter:
extensionId
For runtime.sendMessage(), this is:
string. The ID of the extension to send the message to. Include this to send the message to a different extension. If the intended recipient has set an ID explicitly using the applications key in manifest.json, then extensionId should have that value. Otherwise it should have the ID that was generated for the intended recipient.
If extensionId is omitted, the message will be sent to your own extension.
For runtime.connect(), this is:
string. The ID of the extension to connect to. If the target has set an ID explicitly using the applications key in manifest.json, then extensionId should have that value. Otherwise it should be have the ID that was generated for the target.
Both runtime.onMessage, and runtime.onConnect provide a sender property or parameter, either with the message, or as part of the port. This parameter/property is a runtime.MessageSender which includes an id property which is:
id
string. The ID of the extension that sent the message, if the message was sent by an extension. If the sender set an ID explicitly using the applications key in manifest.json, then id will have this value. Otherwise it will have the ID that was generated for the sender.
Note that in Firefox, before version 54, this value was the extension's internal ID (that is, the UUID that appears in the extension's URL).
I'm trying to use express-flash in a standard web express js app. I don't want to use session, because I want to do the app as stateless as possible, but when I try to use without session, the app show me this error:
req.flash() requires sessions
Can I use express-flash without session? Can I use other alternatives for this kind of messages?
Thanks.
Note: A flash message is a variable stored within a session that is only available once, for the next request. That is if we put a flash variable and renders a page, the flash variable is available but if we render the same (or other) page again the flash variable is not present (it is destroyed).
-- acanimal
Based on this premise, you need to have sessions to use message flashing.
One way I think you can accomplish what you want is to add an item to the request (req) object in your middleware, and then in your controller, check if the key exists. You can then pass a specific message to your template, assuming you're using a template engine or pass it as part of your response.
Hope this helps.
I am unable to read clipboard data in Microsoft Edge browser. i am using the below javascript.
if (window.clipboardData && window.clipboardData.getData) { // IE
pastedText = window.clipboardData.getData('Text');
} else if (e.clipboardData && e.clipboardData.getData) { //non-IE
pastedText = e.clipboardData.getData('text/plain');
}
Non of the if/elseif block is executed in Edge. I tried using
e.originalEvent.clipboardData.getData('text/plain');
But I am getting 'Access is denied.' error.
Let me know, if anybody know how to fix this issue.
Edge does not currently support the clipboard api, but it is under consideration and likely to be added in near future.
I do not have edge, but it seems that you are not authorized to access the clipboard data. Is this on a website or are you calling this from within a JavaScript script executed locally?
Make sure the website is in the trusted sites.
See https://w3c.github.io/clipboard-apis/#clipboard-event-interfaces, or more precisely:
12.1 Privacy concerns
Untrusted scripts should not get uncontrolled access to a user's clipboard data. This specification assumes that granting access to the current clipboard data when a user explicitly initiates a paste operation from the user agent's trusted chrome is acceptable. However, implementors must proceed carefully, and as a minimum implement the precautions below:
Objects implementing the DataTransfer interface to return clipboard data must not be available outside the ClipboardEvent event handler.
If a script stores a reference to an object implementing the DataTransfer interface to use from outside the ClipboardEvent event handler, all methods must be no-ops when called outside the expected context.
Implementations must not let scripts create synthetic clipboard events to get access to real clipboard data except if configured to do so.
Implementations should not let scripts call document.execCommand('paste') unless the user has explicitly allowed it.
Implementations may choose to further limit the functionality provided by the DataTransfer interface. For example, an implementation may allow the user to disable this API, or configure which web sites should be granted access to it.
I'm trying to build my Parse iOS project in a way that'll be more easy to migrate later on for the client should he desire it.
To that end, I'm trying to use the REST API instead of relying on PFUser and PFObjects.
But I love the PFLoginViewController-- it's such a time saver. Is there a way I can use that pre-built login/sign-up flow with the REST API instead of PFUser?
I don't think that u could use it without PFUser but u could create similar to that and time will be consumed.
Still One thing might work out, check this link and I hope you have already but this will show how to integrate the PFLoginViewcontroller so in that they have logInView which will provide you access to all component like loginButton, usernameTextField, passTextField and etc. So you could access to these component your own explicit component.
Like, you could create your own UIButton(namely, logInBtn with action selector and all) then access it to logInView.LogInButton = logInBtn(your own button) and in this button's action you could make Rest api calls for login, and similarly for other component which needs to be modified for your requirement.
I have written a Firefox extension that catches when a particular URL is entered and does some stuff. My main app launches Firefox with this URL. The URL contains sensitive information so I don't want it being stored in the history.
I'm concerned about the case where the extension is not installed. If its not installed and Firefox gets launched with the sensitive URL, it will get stored in history and there's nothing I can do about it. So my idea is to use a bookmarklet.
I will launch Firefox with "javascript:window.location.href='pleaseinstallthisplugin.html'; sensitiveinfo='blahblah'".
If the extension is not installed they will get redirected to a page that tells them to install it and the sensitive info won't get stored in the history. If the extension IS installed it will grab the information in the sensitiveinfo variable and do its thing.
My question is, can the bookmarklet call a method in the extension to pass the sensitive info (and if so, how) or can the extension catch when javascript is being called in the bookmarklet?
How can a bookmarklet and Firefox extension communicate?
p.s. The alternative means of getting around this situation would be for my main app to launch Firefox and communicate with the extension using sockets but I am loath to do that because I've run into too many issues over the years with users with crazy firewalls blocking socket communication. I'd like to do everything without sockets if possible.
As far as I know, bookmarklets can never access chrome files (extensions).
Bookmarklets are executed in the scope of the current document, which is almost always a content document. However, if you are passing it in via the command line, it seems to work:
/Applications/Namoroka.app/Contents/MacOS/firefox-bin javascript:alert\(Components\)
Accessing Components would throw if it was not allowed, but the alert displays the proper object.
You could use unsafeWindow to inject a global. You can add a mere property so that your bookmarklet only needs to detect whether the global is defined or not, but you should know that, as far as I know, there is no way to prohibit sites in a non-bookmarklet context from also sniffing for this same global (since it may be a privacy concern to some that sites can detect whether they are using the extension). I have confirmed in my own add-on which injects a global in a manner similar to that below that it does work in a bookmarklet as well as regular site context.
If you register an nsIObserver, e.g., where content-document-global-created is the topic, and then unwrap the subject, you can inject your global (see this if you need to inject something more sophisticated like an object with methods).
Here is some (untested) code which should do the trick:
var observerService = Cc['#mozilla.org/observer-service;1'].getService(Ci.nsIObserverService);
observerService.addObserver({observe: function (subject, topic, data) {
var unsafeWindow = XPCNativeWrapper.unwrap(subject);
unsafeWindow.myGlobal = true;
}}, 'content-document-global-created', false);
See this and this if you want an apparently easier way in an SDK add-on (not sure whether SDK postMessage communication would work as an alternative but with the apparently same concern that this would be exposed to non-bookmarklet contexts (i.e., regular websites) as well).