I have an HTML text input to store the base64 string from an image canvas.
Apparently when I tried sending a long base64 string to the server, part of the string is not sent which results in grayed out image.
Related
I have this image which I transformed into base64. The issue is the string that it gave me is so huge, I'm not able to see any other lines of codes. I inputted the given string in the source tag and it works the image. How do I shorten the base64 data of the image in order to see other lines of code?.
[an example of the string (couldn't fit the whole screenshot as it's so big)]
Was expecting the base64 string to be short in order to put it in the tag.
I have some trouble in understanding how does html convert base64 to img
From https://www.lucidchart.com/techblog/2017/10/23/base64-encoding-a-visual-explanation/ I learn how string convert to base64,but what dose it happen when base64 encoding to rgb
Base64 is a way to encode binary data as text (so it can be put anywhere you can put text, such as in an HTML attribute value).
The browser converts the Base64 data into whatever form it was in originally.
If that was a PNG it converts it back to a PNG. If it was a JPEG then a JPEG. And so on.
The browser doesn't convert the Base64 data directly to pixel values at all.
I have some text in a database that is encoded in some way, but I don't know what exactly, and the person who built the database and website left no documentation or comments of any kind. Ask an example, ÌÈÑÇä-1914 is stored in the database, but on the website, it is displayed as جبران-1914. How do I decode ÌÈÑÇä-1914 in order to get the Arabic text?
I've tried decoding ÌÈÑÇä-1914 into windows-1256, ISO-8859-1, UTF-8, but when I put it in an html file and lang-eg in the html tag, and meta charset=utf-8, but nothing is letting me display it as Arabic text instead of some indecipherable characters. How can I convert the encoded text into Arabic?
I realized the problem was that I was exporting the data incorrectly--when I exported it as ISO 8859-2 and converting it to windows 1256 in atom it displayed properly.
I am using angular 7 and need to upload image and send it to server to put it in database. So i wondering how to convert image into string and latter back in image so i can display it in app?
This SO answer explains how to convert an image into base64 encoded data.
You can use the HTML5 for it:
Create a canvas, load your image into it and then use toDataURL() to
get the base64 representation (actually, it's a data: URL but it
contains the base64-encoded image).
I don't think that's how you want to save your images though. Continue researching perhaps.
I'm doing a cybersecurity capture the flag challenge and attempting to do buffer overflow on a server. it has an html text box that I'm trying to overflow with particular values. How can I enter ascii characters into this text box? The characters entered after a certain buffer length seem to be converted into their ascii values, so I'm trying to enter characters like NUL, EOT, etc. into the text box.
You can use the hex value, see this or this
For example from python you could use something like:
param = "\x00\x04\x03\x03"
And then send as GET request (see urllib2 or requests or httplib2)
From URL, before of the hex code you must add the % character
yourpage.html/param=%00%04%03%04
Look also this link