node.js streaming gzip http responses

Question

I'm trying to send responses in chunks with gzip but from following example I'm getting "Hello�S�/�I�m��S��k�" in Chrome instead "Hello World!"

var http = require('http'), zlib = require('zlib'); http.createServer(function(req, res) { res.writeHead(200, { 'Content-Type': 'html/text', 'Transfer-Encoding': 'chunked', 'Content-Encoding': 'gzip', 'Content-Type': 'text/html;charset=UTF-8' }); zlib.gzip("Hello", function(_, result) { res.write(result); }); zlib.gzip(" World", function(_, result) { res.write(result); }); zlib.gzip('!', function(_, result) { res.end(result); }); }).listen(1337, '127.0.0.1'); console.log('Server running at http://127.0.0.1:1337/');

Community · Accepted Answer · 2021-10-07 06:01:06Z

2

That is not what is meant by chunked transfer encoding.

See the description in the HTTP standard. In short chunked encoding consists of chunks with an ASCII hex chunk length followed by a CRLF, then that many bytes, then another CRLF. Repeat, end with a zero length chunk and another CRLF for good measure after the zero-length chunk CRLF.

edited Oct 7, 2021 at 6:01

CommunityBot

11 silver badge

answered Jul 30, 2013 at 4:21

Mark Adler

115k15 gold badges137 silver badges183 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Ivan Lazarevic Over a year ago

thanks, but not sure how that's related with problem I described. could you please provide more details ?

Mark Adler Over a year ago

You are lying to the HTTP client by saying that there will be chunked encoding following, but then not doing that. If you are not constructing the HTTP stream per the standard, you cannot expect a good result.

Collectives™ on Stack Overflow

node.js streaming gzip http responses

1 Answer 1

2 Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Related