I am developing a Cocoa Mac app which dynamically generates and registers itself for URL schemes. However, when the application registers itself to handle a newly generated URL scheme (e.g. myscheme1423://), I would like to prevent the application from responding to any previously registered URL schemes.
I am using LSSetDefaultHandlerForURLScheme() for the purpose of registering a URL scheme; in conjunction, the application automatically overwrites it's Info.plist to contain the new scheme. As you may know, the LSSetDefaultHandlerForURLScheme() function adds the given bundleID/scheme to a Launch Services database. However, I couldn't find an equivalent Launch Services function to remove the same bundleID/scheme pair from the database.
I know that I could simply ignore any external events which originated from a URL scheme other than the one for which the app is actively registered, but it feels to me that there should be a simple way to completely wipe out the system's knowledge of the previous scheme. If my application goes through the process of registering for a new scheme more than a few hundred times, a point will come where a significant amount of space (for a Plist, at least) is being taken up on disk by a plethora of pointless pieces of data (i.e. the old Launch Services entries).
I just fired up a playground and began playing. This is utterly undocumented but it appears to work.
Try passing ("None" as CFString) for the second parameter of
LSSetDefaultHandlerForURLScheme()
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I have a question about WebktGTK.
These days I am making a program which is can analysis web page if has suspicious web content.
When "load-failed" "load-changed" signal is emitted with WEBKIT_LOAD_FINISHED,
The program anlaysis the next page continuously by calling webkit_web_view_load_uri again again.
(http://webkitgtk.org/reference/webkit2gtk/stable/WebKitWebView.html#webkit-web-view-load-uri)
The question want to ask you is memory problem.
The more the program analsysis the webpages, The more WebKitWebProcess is bigger.
webkit_back_forward_list_get_length() return value also increased by analysising web pages. Where shoud I free memory?
Do you know how Can I solve this problem or Could give me any advice where Can I get advice?
Thank you very much :-) Have a nice day ^^
In theory, what you're doing is perfectly fine, and you shouldn't need to change your code at all. In practice, WebKit has a lot of memory leaks, and programatically loading many new URIs in the same web view is eventually going to be problematic, as you've found.
My recommendation is to periodically, every so many page loads, create a new web view that uses a separate web process, and destroy the original web view. (That will also reset the back/forward list to stop it from growing, though I suspect the memory lost to the back/forward list is probably not significant compared to memory leaks when rendering the page.) I filed Bug 151203 - [GTK] Start a new web process when calling webkit_web_view_load functions? to consider having this happen automatically; your issue indicates we may need to bump the priority on that. In the meantime, you'll have to do it manually:
Before doing anything else in your application, set the process model to WEBKIT_PROCESS_MODEL_MULTIPLE_SECONDARY_PROCESSES using webkit_web_context_set_process_model(). (If you are not creating your own web contexts, you'll need to use the default web context webkit_web_context_get_default().)
Periodically destroy your web view with gtk_widget_destroy(), then create a new one using webkit_web_view_new() et. al. and attach it somewhere in your widget hierarchy. (Be sure NOT to use webkit_web_view_new_with_related_view() as that's how you get two web views to use the same web process.)
If you have trouble getting that solution to work, an extreme alternative would be to periodically send SIGTERM to your web process to get a new one. Connect to WebKitWebView::web-process-crashed, and call webkit_web_view_load_uri() from there. That will result in the same web view using a new web process.
This is somewhat a duplicate of this question, but that question has no (valid) answer and is 1.5 years old so asking my own with hopes people have more info now.
If you are using multiple instances of a WebBrowser control, MSHTML, IHTMLDocument, or whatever... from inside the APP instance, mostly IInternetProtocol::Start, is there a way to know which instance is loading the resource? Or is there a way to use a different APP for each instance of the control, maybe by providing one via IDocHostUIHandler or ICustomDoc or otherwise? I'm currently using IInternetSession::RegisterNameSpace to make it process wide.
Optional reading below, don't feel you need to read it unless above isn't clear.
I'm working on a legacy (Win32 C++) email client that uses the MS ActiveX WebBrowser control (MSHTML or other names it goes by) to display HTML emails. It was saving everything to temp files, updating the cid: URLs, and then having the control load that. Now I want to do it the correct way, using APP. I've got it all working with some test code that just uses static variables/globals and loads one email.
My problem now is, the app might have several instances of the control all loading different emails (and other stuff) at the same time... not really multiple threads so much, just the asynchronous nature of the control. I can give each instance of the control a unique URL to load the email, say, cid:email-GUID, and then in my APP code I can use that URL to know which email to load. However, when it comes to loading any content inside the email, like attached images using src="cid:", those will not always be unique so I will not always know which image it is, for which email. I'd like to avoid having to modify the URLs of the HTML before displaying it (I'm doing that now for the temp file thing, but want to do it a better way).
IInternetBindInfo::GetBindString can return the referrer, BINDSTRING_XDR_ORIGIN, or the root URL, BINDSTRING_ROOTDOC_URL, but those require newer versions of IE and my legacy app must support older XP installs that might even have IE6 or IE7, so I'd rather not use these.
Tagged as TWebBrowser because that is actually what I'm using (Borland Builder 6 C++), but don't need answers specific to that platform.
As the Asynchronous Pluggable Protocol Handler us very low level, you cannot attach handlers individually to different rendering controls.
Here is a way to get the referrer:
Obtain BINDSTRING_HEADERS
Extract the referrer by parsing the line Referer: http://....
See also How can I add an extra http header using IHTTPNegotiate?
Here is another crazy way:
Create another Asynchronous Pluggable Protocol Handler by calling RegisterMimeFilter.
Monitor text/plain and text/html
Scan the incoming email source (content comes incrementally) and parse store all image links in a dictionary
In NameSpaceHandler you can use this dictionary to find the reference of any image resources.
I have this requirement : My WL application have a set of static pages that might be updated any time. Originally the source of all static content is a desktop page that will be transformed by xsl to a mobile friendly content. The problem that I don't want to do that on each request (HA requirement).
I want to get some inspiration on how to architect that without using direct update mechanism (don't want the end user to get notified of these updates).
I should note that pages will change rarely every few month maybe.
I'm thinking about 2 ways of doing that :
1- Making the transformation on adapter side and rely on WL caching so that transformation is not made each time (does that exist ?). But how the adapter will get notified of page change and flush the cache ? Should I program some advanced java based adapter ? (Storing in the cache and having a kind of a job that scans every day for content changes ?)
2- Doing it mobile side but I don't know how to get notified of changes !
Is your only problem with Worklight's Direct Update that the user is being notified and is required to explicitly approve the transfer?
In this case why not use the option of Silent Direct Update?
The property you're looking for is updateSliently set to true in initOptions.js.
For this to work it is required, obviously, that connectOnStartup will be set to true as well.
perhaps what is doable is to use an adapter to fetch the HTML (or whatever it is) and save it to the device's local storage and then have the app display this content, this way you do not alter the app's web resources and not trigger Direct Update.
I'm going to preface this by saying that I understand the new Windows 8 application lifecycle and how it is now 100% up to the user to decide if they want to terminate the app or not. So, I guess what I'm looking to find is a way to pseudo-restart my app, although I'm open to other suggestions as I'm pretty new to designing Modern UI apps.
I'm building an app that interfaces with a Web 2.0 service that requires authentication via OAuth. Fortunately the Windows 8 WebAuthenticationBroker makes this simple: it displays an asynchronous modal window that houses the web frame to allow the user to sign in and I get to provide a callback method when its done.
Now, obviously I only want to display this sign-in screen if I don't already have a session key stored for the user in roamingSettings.values. I used the Grid App template in Visual Studio, and I execute these functions in default.js as soon as the app is activated (checking roamingStorage, calling WebAuthBroker, etc). Now, the Grid App template provides a data.js to allow me to define some of the REST endpoints that I want to fetch. The main problem is that I can't fetch these REST endpoints until the user is authenticated! Yet they still have to (at least, I think) be declared in data.js ahead of time. So what I'm doing now to avoid errors in the event that the user isn't signed in, is the following:
if (roamingSettings.values[sessionKey]){
list = getFeedItems(); // my function that issues all the REST calls
} else {
list = new WinJS.Binding.List();
}
This works fine if the app is manually restarted after authentication is complete, but I would really rather have a way of completely reloading the app asynchronously after authentication is complete. I've spent a ton of time on this already and I'm getting extremely annoyed because I've seen other apps do this (Instametrogram, for example).
Any ideas?
To answer the core question here, how do you soft restart: window.location.reload() is all you need. This just does the refresh in place.
However, what you are actually looking to do is reset the datasource on the ListView instance -- all you need to do is get hold of that control at runtime, and re-assign the data source to it. E.g.:
var lv = document.getElementById("myListView");
lv.winControl.itemSource = list;
An example of this should also be in the app you have from when it currently assigns the list to the listview.
I'm working on something that needs to install files periodically into a folder in /Library.
I understand that in the past I could have used one of the Authenticate methods but those have since been deprecated in 10.7.
What I've understood from my reading so far:
I should create a helper that somehow gets authenticated and have that helper do all of the moving tasks. I've taken a look at some of the sample code, including some involving XPC and one called Elevator but I'm a bit confused.
A lot of it seems to deal with setting up some sort of client / server model but I'm not sure how this would translate into me actually installing my files into the correct directories. Most of the examples are just passing strings.
My question simply: How can I create my folder in /Library programmatically and periodically write files to it while only prompting the user for a password ONCE and never again? I'm really not sure how to approach this and there doesn't seem to be much documentation.
You are correct that there isn't much documentation for this. You'll basically write another app, the helper app, which will get installed with SMJobBless(). Not surprisingly,
the tricky part here is the code signing. The least obvious part for me was that the SMAuthorizedClients and SMPrivilegedExecutables entries in the info plist files of each app are dependent on the identity/certificate that you used to sign the app with. There is also a trick with the compiler/linker to getting the info plist file compiled into the helper tool, which will be a single executable file, rather than a bundle.
Once you get the helper app up and running then you have to devise a way to communicate with it since these are two different processes. XPC is one option, perhaps the easiest. XPC is typically used with server processes, but what you are using here is the communication side of XPC only. Basically it passes dictionaries back and forth between the two apps. Create a standard format for the dictionary. I used #"action", #"source", and #"destination" with 3 different action values, #"filemove", #"filecopy", and #"makedirectory". Those are the 3 things that my helper app can do and I can easily add more if necessary.
The helper app will basically setup the XPC connection and event handler stuff and wait for a connection and commands. The commands will just be a dictionary so you check for the appropriate keys/values and do whatever.
I can provide more details and code if you need more help, but this question is 9 months old so I don't want to waste time giving you details you've already figured out.