Browser support of multipart responses
I would like to create a HTTP response, using multipart/mixed, but I'm not sure which browsers support it; and if it's as convenient as it sounds, from the client's point of view. To be honest, I do not need specifically that content type. I just want to transmit more than one file in the same response; maybe there's another content-type more used.
Answer
I've tested it, with a home-made server and a simple response. Not sure if the response is well-formed because no browser understands it 100% OK. But here are the results:
- Firefox 67.0.1 (64-bit): Renders only the last part, others are ignored.
- IE 11.503: Saves all the content in a single file (including the boundaries), nothing is rendered.
- Chrome May 2019: Saves all the content in a single file, nothing is rendered.
- Safari 4: Saves all the content in a single file, nothing is rendered.
- Opera 10.10: Something weird. Starts rendering the first part as plain/text, and then clears everything. The loading progress bar hangs on 31%.
Here's the complete response, if anyone finds any error, please tell me and I'll try again:
HTTP/1.1 200 OK
Date: Tue, 01 Dec 2009 23:27:30 GMT
Vary: Accept-Encoding,User-Agent
Content-Length: 681
Content-Type: Multipart/mixed; boundary="sample_boundary";
Multipart not supported :(
--sample_boundary
Content-Type: text/css; charset=utf-8
Content-Location: http://localhost:2080/file.css
body
{
background-color: yellow;
}
--sample_boundary
Content-Type: application/x-javascript; charset=utf-8
Content-Location: http://localhost:2080/file.js
alert("Hello from a javascript!!!");
--sample_boundary
Content-Type: text/html; charset=utf-8
Content-Base: http://localhost:2080/
<html>
<head>
<link rel="stylesheet" href="http://localhost:2080/file.css">
</head>
<body>
Hello from a html
<script type="text/javascript" src="http://localhost:2080/file.js"></script>
</body>
</html>
--sample_boundary--