data-uri

How to create an ArrayBuffer and data URI from Blob and File objects without FileReader?

I just put it here: var input = document.querySelector(“input[type=file]”); input.addEventListener(“change”, handleFiles, true); // for url window.URL = window.URL || window.webkitURL; function handleFiles(evnet) { var file = event.target.files[0]; document.querySelector(‘iframe’) .setAttribute(‘src’, window.URL.createObjectURL(file)); } <!DOCTYPE html> <html> <head> </head> <body> <form method=”get” entype=”multipart/form-data” target=”binaryFrame”> <input id=”#avatar” type=”file” name=”file” /> <input type=”submit” /> </form> <iframe name=”binaryFrame”></iframe> </body> </html>

Why use data URI scheme?

According to Wikipedia: Advantages: HTTP request and header traffic is not required for embedded data, so data URIs consume less bandwidth whenever the overhead of encoding the inline content as a data URI is smaller than the HTTP overhead. For example, the required base64 encoding for an image 600 bytes long would be 800 bytes, … Read more

How to parse data-uri in python?

Split the data URI on the comma to get the base64 encoded data without the header. Call base64.b64decode to decode that to bytes. Last, write the bytes to a file. from base64 import b64decode data_uri = “data:image/png;base64,iVBORw0KGg…” # Python 2 and <Python 3.4 header, encoded = data_uri.split(“,”, 1) data = b64decode(encoded) # Python 3.4+ # … Read more

PHP Data-URI to file

A quick look at the PHP manual yields the following: If you want to save data that is derived from a Javascript canvas.toDataURL() function, you have to convert blanks into plusses. If you do not do that, the decoded data is corrupted: $encodedData = str_replace(‘ ‘,’+’,$encodedData); $decodedData = base64_decode($encodedData);

How to create a Web Worker from a string

Summary blob: for Chrome 8+, Firefox 6+, Safari 6.0+, Opera 15+ data:application/javascript for Opera 10.60 – 12 eval otherwise (IE 10+) URL.createObjectURL(<Blob blob>) can be used to create a Web worker from a string. The blob can be created using the BlobBuilder API deprecated or the Blob constructor. Demo: http://jsfiddle.net/uqcFM/49/ // URL.createObjectURL window.URL = window.URL … Read more

Convert HTML to data:text/html link using JavaScript

Characteristics of a data-URI A data-URI with MIME-type text/html has to be in one of these formats: data:text/html,<HTML HERE> data:text/html;charset=UTF-8,<HTML HERE> Base-64 encoding is not necessary. If your code contains non-ASCII characters, such as éé, charset=UTF-8 has to be added. The following characters have to be escaped: # – Firefox and Opera interpret this character … Read more