Encryption with Ionic 2 [closed] - encryption

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I am looking to implement Encrypt/Decrypt functionality in my Ionic 2 app. I am looking for something simple, that will work with Ionic 2.
Please can anyone recommend a library/plugin that works with Ionic 2?
I have tried a few libraries, but cannot get them to work in Ionic 2. I have issues with the import into Ionic 2.
E.g.
Using js-jose, I get the following error:
TypeError: Argument 3 of SubtleCrypto.wrapKey does not implement interface CryptoKey
Using Crypto-js, I get the following error:
JavaScript library of crypto standards implementation

For storing data on the device, you can switch to secure storage cordova plugin instead of the insecure localstorage. Note For android, you need to have either setup pin or swipe screen lock to make this work.
ionic add plugin cordova-plugin-secure-storage
cordova-plugin-secure-storage
Dont forget to wrap the plugin inside platform.ready()
constructor(public platform: Platform) {
platform.ready().then(() => {
this.secureStorage = new SecureStorage();
this.secureStorage.create('demoAppStorage').then(
() => {
console.log('SecureStorage is ready!');
},
error => console.log(error)
);
});

You can try using NodeJS crypto library. https://nodejs.org/api/crypto.html#crypto_crypto

I use CryptoJS and CryptoBrowserify
i.e
import CryptoJS from 'crypto-js';
import CryptoBrowserify from 'crypto-browserify';
var encrypted = CryptoBrowserify.publicEncrypt( publicKey,new Buffer(data));

Related

how can i call query with a notEqual (!=) where-clause using **Flutter** cloud_firestore plugin? [closed]

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firebase team announced in this blog post that they now support notEquals in where-clause queries,
how can we call such a query in flutter?
i use the latest version in pubspec.yaml:
cloud_firestore: ^0.14.2
for instance in firebase this is now (October 1, 2020) possible:
collection("projects").where("status", "!=", "completed")
and in flutter it's not working (too many positional arguments):
FirebaseFirestore.instance.collection("projects").where("status", "!=", "completed");
and there is no named arguments for it, the only arguments i can find:
Query where(
dynamic field, {
dynamic isEqualTo,
dynamic isLessThan,
dynamic isLessThanOrEqualTo,
dynamic isGreaterThan,
dynamic isGreaterThanOrEqualTo,
dynamic arrayContains,
List<dynamic> arrayContainsAny,
List<dynamic> whereIn,
bool isNull,
})
does any one have a workaround / idea / solution ?
Post this answer as a Community Wiki as this was already commented by #DougSteveson and at the related question shared by him.
Firebase does support the != and not-in query clauses in it's latest release, you can check it's usage with the official SDK in the documentation.
However, the Flutter Firestore libraries were not yet updated, as this is still a very new feature. Currently the update for this feature is merged and should appear in a future release, as described in the release notes.

Need to generate QR Code in Oracle [closed]

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I am in need of generating QR Code in oracle database and print them in PDF document generated through BI Publisher.
I have tried many places and found below post which makes use of Zxing Library to generate QR Code in Oracle DB through Zxing Library:
https://community.oracle.com/message/13360407#13360407
But the db in which i am currently working is having Java 1.5 but zxing needs 1.6/1.7
I have asked Zxing group whether they have any older version which supports 1.5:
https://groups.google.com/forum/#!forum/zxing
In the meanwhile tried looking for qrcode generator which is purely pl/sql and found below in GITHUB:
1. as_barcode by antonscheffer
and
2. make_qr by svetka17
But both the pl/sql package is missing something and giving out error.
Do you guys know any idea how i can generate qr code in pl/sql or any Java 1.5 qr code library which i can use in Oracle Database ?
Opensource will be helpful and not interested in IDAutomation as its out of my budget.
Thanks and Regards,
Salman Farish.
A new version of BI Publisher (12.2.1.4) provides QR codes as a feature.
https://blogs.oracle.com/xmlpublisher/oracle-bi-publisher-12214-now-available
https://www.oracle.com/technetwork/middleware/bi-publisher/new-features-12214-4470018.pdf
There is a pure Plsql package to generate QR code.
There are options to generate QR code as BMP, SVG etc.
https://oraclescribble.blogspot.com/2022/08/create-qr-code-in-oracle-database-pure.html

Meteor progressbar for template subscriptions with actual progress [closed]

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Is there a package for subscription progress for template subscriptions?
I have always used:
multiply:iron-router-progress
but I now switched to template subscriptions:
Template.templatename.onCreated(function() {
var self = this;
self.autorun(function(){
self.subscribe("subname");
});
});
which are not compatible with above progress package.
I now tried settinghead:auto-nprogress, but it seems to simply display an arbitrary loading bar with a statically defined timed progress. It is not actually showing the progress based on the subscription status (e.g. 120/1000 documents loaded).
Does anybody know a package that supports this?
Looking at the implementation in the package you mention (https://github.com/Multiply/iron-router-progress/blob/master/progress.coffee), it is literally using random numbers to move the progress bar forward. Looking at docs.meteor.com, I don't see any hooks in subscriptions that would allow you to do a meaningful progress bar tied to progress.
Instead, use Template.subscriptionsReady to either load your content or a loading spinner/etc.

IEmailSender - library [closed]

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Closed 7 years ago.
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Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
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What library i need for IEmailSender in asp.net mvc 5 ?
This is how code looks like:
public class PasswordResetHelper
{
private IEmailSender emailSender;
public PasswordResetHelper(IEmailSender emailSenderParam)
{
emailSender = emailSenderParam;
}
public void ResetPassword()
{
// ...call interface methods to configure e-mail details...
emailSender.SendEmail();
}
}
I take that code from a book for mvc 5 but it didn't work.
What i do wrong ?
P.S. Sorry for bad english.
You seem to be looking for a piece of code that will send emails for you. This isn't in that book.
The code you show is in a chapter that's titled "Building Loosely Coupled Components":
[...] one of [the] most important features of the MVC pattern is that it enables separation of concerns. [...] A simple example will help put things in context. If we were writing a component called MyEmailSender to send e-mail messages [...]
Emphasis mine.
They're trying to teach you the concept of building good, maintainable, testable software through separation of concerns and dependency injection.
If you're just looking for copy-pasteable code to implement an email sending class, you've bought the wrong book.
If all you're looking for is code to send an email, see How to send email in ASP.NET C#.

What are the allowed characters in a css property and a css value [duplicate]

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Is there a library out there which will validate CSS?
The only tools I can find to do so are web sites. If one of these sites has an API, that would fit the bill, too.
I have a script that serves as a CSS compiler. It sets various variables according to settings for a theme, and generates and writes a CSS file. Before committing to writing the CSS file, I'd like to validate it to make sure there aren't any invalid entries.
PHP would be convenient, but Python, Perl, Ruby, Java, or anything executable from a shell would be fine.
Ideally, there's something out there that I can use as part of a sequence like:
$css_file=theme_compile('theme-name');
if(!validate_css($css_file)){
echo "css file contained invalid entry 'width:px'";//just an example, of course
}
else{
file_put_contents('/path/css_file',$css_file);
}
W3C has an API:
http://jigsaw.w3.org/css-validator/api.html
You can also download the validator and run it locally:
http://jigsaw.w3.org/css-validator/DOWNLOAD.html
You need to be able to run java from your script.
Python library:
http://cthedot.de/cssutils/
There is a pear package called Services_W3C_CSSValidator which does this.
You can download the PHP class directly from the github if you prefer.
Its very simple to use.
require_once 'Services/W3C/CSSValidator.php';
$v = new Services_W3C_CSSValidator();
$result = $v->validateFile('pear_manual.css'); // XML
It includes all features available at http://jigsaw.w3.org/css-validator

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