QRCode-generator | Easily create your QR Code with this application | QRCode Processing library
kandi X-RAY | QRCode-generator Summary
kandi X-RAY | QRCode-generator Summary
Easily create your QR Code with this application.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of QRCode-generator
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QRCode-generator Examples and Code Snippets
Community Discussions
Trending Discussions on QRCode-generator
QUESTION
I have the following example of PDF417 barcode:
which can be decoded with online tool like zxing
as the following result: 5wwwwwxwww0app5p3pewi0edpeapifxe0ixiwwdfxxi0xf5e�¼ô���������¬‚C`Ìe%�æ‹�ÀsõbÿG)=‡x‚�qÀ1ß–[FzùŽûVû�É�üæ±RNI�Y[.H»Eàó¼åñüì²�tØ¿ªWp…Ã�{�Õ*
as 5wwwwwxwww0app5p3pewi0edpeapifxe0ixiwwdfxxi0xf5e~|~~~~~~~~~~d~C`~e%~~~~;To~B~{~dj9v~~Z[Xm~~"HP3~~LH~~~O~"S~~,~~~~~~~k1~~~u~Iw}SQ~fqX4~mbc_ (I don't know which encoding is used to encode this)
The first part of the encoded key that contains barcode is always known and it is 5wwwwwxwww0app5p3pewi0edpeapifxe0ixiwwdfxxi0xf5e
The second part of it can be decoded from the base64string and it always contains 88 bytes. In my case it is:
Frz0DAAAAAAAAAAArIJDYMxlJQDmiwHAc/Vi/0cpPYd4ghlxwDHflltGevmO+1b7GckT/OZ/sVJOSRpZWy5Iu0Xg87zl8fzssg502L+qV3CFwxZ/ewjVKg==
I'm using Swift on iOS device to generate this PDF417 barcode by decoding the provided base64 string like this:
...ANSWER
Answered 2021-Mar-07 at 10:01CIPDF417BarcodeGenerator has a few more input parameters besides inputMessage that can have an influence on how the generated barcode looks - see the documentation. Visual inspection/comparison of two codes only makes sense when you know that all these parameters, most importantly inputCorrectionLevel were equal for both generators.
So, instead of a visual comparison, simply try decoding the barcodes using one of the many scanner apps out there, and compare the decoded bytes.
For your second example, try this:
QUESTION
I'm getting this error with npm react-native-webview@9.0.1 when I try to generate a QR code with react-native-qrcode-generator
I'm using react-native with an expo managed workflow. And the thing is it works on iOS, and i only get the error on Android
I searched for a solution myself and I tried installing react-native-get-random-values but that also didn't work.
Any thoughts?
...ANSWER
Answered 2020-Apr-12 at 13:34I made a snack with Expo SDK 37 and the exact versions you mention:
QUESTION
when i trying to start this code https://github.com/Sabrjkee/docker-qrcode-generator.git in blue ocean i recive this massege
...ANSWER
Answered 2018-Aug-28 at 08:28It looks like folder where docker-compose binary file is is not included into PATH in your Jenkins pipeline.
You can add it using environment section:
QUESTION
So i have this code as my index page and It was working, but a couple minutes later it just stopped.
the error is:
...ANSWER
Answered 2019-Jun-20 at 16:40In your build property in nuxt.config.js you'll need to add a transpile block that targets this library:
QUESTION
I found this free PWA https://www.the-qrcode-generator.com and now wonder how I could do one such myself.
Since I couldn't find any access to its source code I wondered if it'd be difficult to reverse engineer.
I'm interested in building a PWA with QRCode functionality.
...ANSWER
Answered 2018-Oct-07 at 09:28This one was created with AngularJS v1.3.20. You can find the source in your console windows under Sources tab. You can easily beautify the code inside the window to make it readable.
QUESTION
After a lot of struggling, I found out some behavior I can't explain / solve, so asking here for help. On our server (Ubuntu 16.04.5 LTS with PHP 7.0.30), we're using some tools outside of the 'httpdocs', which are called using exec() to get their outputs. In this case, it's a QRCode-generator.
Some of the QR-codes however, won't be displayed. We got an output from the tool (outputting data of a PNG), but when we show it as an image, it appears to be broken for some reason.
After a lot of debugging I found out the result sometimes differs 1 or 2 bytes from the output of the tool.
I did my last debugging using the QR-code below (12345), which is a file of 240 bytes. However, when outputting it eventually, the length appears to be 239 bytes, so we lost a byte somewhere?
I found out using exec(), we're creating an array of the output. Trailing whitespace, such as \n, is not included in this array, so implode() to glue the array back to a string, like below:
ANSWER
Answered 2018-Jul-30 at 22:00According to the manual entry for exec, the function returns the last line of output. Whether that last line is also included as the last element of $output is unclear.
But more importantly the the manual states:
Trailing whitespace, such as \n, is not included in this array.
I would guess that this is per-element of the array (i.e. per-line of your output), but either way, your whitespace will be significant here, because you're not dealing with text - all the bytes are important and meaningful here. Remember, whitespace doesn't just mean \n. It can also mean \t or (a space), for example.
In the event that a line ends with F\t\n (a capital F, or any other non-whitespace character, a tab, then a newline), both whitespace characters would be stripped from the end. When doing your implode operation, you might be putting the \n back, but you'll never know about the \t that was stripped.
The key thing to realise here is that exec is expecting to be dealing with plain text not raw binary data.
I would suggest that instead of using cat qr.png, you use base64 qr.png to encode the binary data into an ASCII string, then decode it in PHP with base64_decode. If you're not going to be using cat in reality, you can still pipe the output of your QR-generating command through base64 like this: generate-qr-png |base64. There shouldn't be any significant whitespace in that situation, so nothing would get munged by exec.
QUESTION
I'm using this library to generate a QR code for Google Authenticator.
Unfortunately when I then scan the QR code, it's incorrect. Uploading the QR code to this website provides the following:
OTPAUTH%3A%2F%2FTOTP :0000000000000000000000000000000000000000000000000000000000000000000000000000000
Something seems to go wrong after totp but the next part of the input is %2F which has already appeared twice and been handled correctly.
When I put the input string into this online generator, the QR code is correctly generated.
Here is my code:
...ANSWER
Answered 2018-May-30 at 22:43I had good success with diagrams-qrcode.
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