Note: I want solutions only for neo4j community edition, not the enterprise one. Thanks!
I want to use the default web interface http://localhost:7474/browser/ for development and read/write purposes Also, I would like to use another web interface which I will apparently open to public for read purposes, which may go by certain different port say, 8474.
I tried this:
- Used two instances(neo4j folders) - a) read_only = true b) read_only commented out.
- Changed http/https ports for the both to differentiate.
- Changed org.neo4j.server.database.location property in 'read_only' one to point to the location of 'read/write' one.
This doesn't work. Any workaround? I just want two web-interfaces for the same database. One read only. One read/write supported.
Setup a cluster of 3 Neo4j enterprise instances (or 2 instances plus one arbiter) and set read_only=true on one of the instances.
See http://neo4j.com/docs/stable/ha-setup-tutorial.html for detailed setup instructions.
Related
I have been extensively using a custom protocol on all our internal apps to open any type of document (CAD, CAM, PDF, etc.), to open File Explorer and select a specific file, and to run other applications.
Years ago I defined one myprotocol protocol that executes C:\Windows\System32\wscript.exe passing the name of my VBScript and whatever argument each request has. The first argument passed to the script describe the type of action (OpenDocument, ShowFileInFileExplorer, ExportBOM, etc.), the following arguments are passed to the action.
Everything worked well until last year, when wscript.exe stopped working (see here for details). I fixed that problem by copying it to wscript2.exe. Creating a copy is now a step in the standard configuration of all our computers and using wscript2.exe is now the official configuration of our custom protocol. (Our anti-virus customer support couldn't find anything that interacts with wscript.exe).
Today, after building a new computer, we found out that:
Firefox doesn't see wscript2.exe. If I click on a custom protocol link, then click on the browse button and open the folder, I only see a small subset of .exe files, which includes wscript.exe, but doesn't include wscript2.exe (I don't know how recent this problem is because I don't personally use FireFox).
Firefox sees wscript.exe, but it still doesn't work (same behavior as described in my previous post linked above)
Chrome works with wscript2.exe, but now it always asks for confirmation. According to this article this seems to be the new approach, and things could change again soon. Clicking on a confirmation box every time is a big no-no with my users. This would slow down many workflows that require quickly clicking hundreds of links on a page and, for example, look at a CAD application zooming to one geometry in a large drawing.
I already fixed one problem last year, I am dealing with another one now, and reading that article scares me and makes me think that more problems will arise soon.
So here is the question: is there an alternative to using custom protocols?
I am not working on a web app for public consumption. My custom protocol requires the VBScript file, the applications that the script uses and tons of network shared folders. They are only used in our internal network and the computers that use them are manually configured.
First of all, that's super risky even if it's on internal network only. Unless computers/users/browsers are locked out of internet, it is possible that someone guesses or finds out your protocol's name, sends link to someone in your company and causes a lot of trouble (possibly loss too).
Anyway...
Since you are controlling software on all of the computers, you could add a mini-server on every machine, listening to localhost only, that simply calls your script. Then define host like secret.myprotocol to point to that server, e.g., localhost:1234.
Just to lessen potential problems a bit, local server would use HTTPS only, with proper certificate, HSTS and HPKP set to a very long time (since you control software, you can refresh those when needed). The last two, just in case someone tries to setup the same domain and, for whatever reason, host override doesn't work and user ends up calling a hostile server.
So, links would have to change from myprotocol://whatever to https://secret.myprotocol/whatever.
It does introduce new attack surface ("mini-server"), but should be easy enough to implement, to minimize size of that surface :). "Mini-server" does not even have to be real www server, a simple script that can listen on socket and call wscript.exe would do (unless you need to pass more info to it).
Real server has more code that can have bugs in it, but also allows to add more things, for example a "pass through" page, that shows info "Opening document X in 3 seconds..." and a "cancel" button.
It could also require session login of some kind (just to be sure it's user who requests action, and not something else).
The title of this blog post says it all: Browser Architecture: Web-to-App Communication Overview.
It describes a list of Web-to-App Communication techniques and links to dedicated posts for some of them.
The first in the list is Application Protocols, which I have been using for years already, and it started to crumble in the last year or so (hence my question).
The fifth is Local Web Server, which is the one described by ahwayakchih.
UPDATE (this update follows the update on the blog post above mentioned)
Apparently I wasn't the only one thinking that this change in behavior was a regression, so a workaround has been issued: the old behavior (showing a checkbox that allows to remember the answer) can be restored by adding these keys to the registry:
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge]
"ExternalProtocolDialogShowAlwaysOpenCheckbox"=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome]
"ExternalProtocolDialogShowAlwaysOpenCheckbox"=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Chromium]
"ExternalProtocolDialogShowAlwaysOpenCheckbox"=dword:00000001
I'm fairly new to nod-red oder nodejs in generel. But I think with time I got a decent understanding.
At the moment I'm using node-red-dashboard to give my home automation a nice touch and easy controlling interface.
All my devices communicate via MQTT and I organize my rooms (for example) with different tabs in node-red.
Maybe it's just a missunderstanding of mine, but how do I use the same mqtt-connection (or db connection, etc.) throughout different tabs? I've configured a new one for each tab and can see in the log, that individual connections are made for each tab.
The connection from another tab is not shown inside the nodes on another tab.
Maybe you can point me in the right direction.
Cheers,
Patrik
In the mqtt-broker configuration node's edit dialog, there is a select box where you can pick the 'scope' of the node. It defaults to the tab you're currently on, but if you change that to 'global', the config node will be available on all tabs.
I have a mobile app developed for number of different companies on AppStroe. Each company is using different endpoint to server/icon/logo. I have managed to add this in custom plist file and according to companies endpoint, I switched to different build setting.
Now these companies are going to different ways of authentication. One is using another app to authenticate and one is using server calls. Also for one company I am receiving datas one from server call and other one from local files.
I have to handle different login behaviour for different projects. It is mostly display/disable some extra views. I don't want to have two repositories or branches. Because almost %85 of functionalities are same. I want to add functionalities same time to both and some times to only one of them and run my tests and all.
I am looking for some way way to manage this app to maintain most functionalities and keep it only one app. How can I do that? Any suggestion?
This is a very old problem. Basically you have two options: build time and run-time; from your description it may be that you need a both (I would not trust configuration to drive my authentication code).
Build time means using conditional compile (e.g. Which conditional compile to use to switch between Mac and iPhone specific code?) and a different build profile for each customer. I assume that Xcode Targets (see How to manage the code of multiple, very similar Xcode projects) allows you to define different build profiles.
Run-time checks maps to Feature Toggling.
I suggest not using version control to manage nuances of the same application because it quickly becomes a merge nightmare, even with Git.
I'm very new using either neo4jDatabase or neo4jclient driver, I'm trying to create a proof-of-concept to understand if make sense to use this technology and I've the following doubts, (I tried to search over the web but no answers...).
I have some entities that have Documents associated with them, (PDFs, DOCx ...), is it possible to have a Node property pointing to those documents? or Can documents be added as a Graph Node with a Lucene index so that a search could return document node and related relationships?
How does the Security works? is it possible to the users have access to the nodes taking in consideration their profile? Imagine that the nodes represent documents how can be implemented a security mechanism that the users only access their nodes (Documents)?
Q1: You can simply add a node property with a URI referencing the document of choice. That could be pointing to blob storage, local disk, wherever you store your documents. You could add binary objects in a node's property (by using a byte array) but I wouldn't advise doing that, since that just adds bulk to the database footprint. For reference, here are all the node property types supported.
Q2: Security is going to be on the database itself, not on nodes. Node-level (or document-level in your case) security would need to be implemented in your application. To keep data secure, you should consider hiding your Neo4j server (and related endpoint) behind a firewall and not expose it to the web. For example, in Windows Azure, you'd deploy it to a Virtual Machine without any Input Endpoints, and just connect via an internal connection. For all the details around neo4j security, take a look at this page.
1) What David said.
2) For resource level security, you need to model this in to your graph. There's an example at http://docs.neo4j.org/chunked/milestone/examples-acl-structures-in-graphs.html
I have this idea for a project. Associated with any web page, i want to create notes that will be saved locally in a database, the notes will be reloaded automatically from that database the next time i visit the same page.
Creating the note is easy, but i'm looking for how to link the notes to the web page url and how to keep aware of the active web page. Any idea?
(Note: i have come to this searching on the internet: http://webkit.org/demos/sticky-notes/ - this is part of WebKit Open source projects) - this is about what i'm looking for.
Thank.
Browserdependent probably. You'll have to have a plugin for every browser type.
IE might be doable via the COM interface, but that probably would require starting IE via a way you control. So that probably will have to be a plugin too.
For browser independence, there are quite a few challenges in this one. One way would be to implement a proxy server and watch for text/html content....this will work for most of the general cases, but not every case. Handling frames for instance... which resource is the "parent" and which is the "child"? Which one contains the sticky note? I think you would have to inject some client side javascript to keep track of things, and that might break some websites.
protonotes.com is a web service version of this. Not sure how they do it though.
Actually, Daniel H hit the nail on the head mate: http://www.protonotes.com
It does exactly as you want, in fact it gives you two options to store your data, the first is hosted, the second is your own mySQL db - protonotes pipes the data from the tack-on style notes to your own db, if you prefer. This means that you're not the only person who can see the notes - access is granted by a unique 'group' key.
I've just deployed protonotes as our main online review tool for two reasons, we can save our own data, and it lacks some features which I generally label "dubious" anyway.
It's simplicity is great, the only thing I'm aware of that could cause a prob is that it dumps a bunch of stuff in the global namespace - if that's a potential problem for you.
d