gzip has internal headers that must only appear at the beginning. You
can't send two gzip documents in the same document. The browsers don't
support that.
If you have the same two chunks all the time, you can combine and then gzip
once and send the one resulting chunk.
On Fri, May 24, 2013 at 2:04 PM, Sławek Janecki <jane...@gmail.com> wrote:
> Lets say I have 2 individually gziped html chunks in memory. Can I send
> chunk1+chunk2 to HTTP client? Does any browser supports this? Or there is
> no way to do this and I have to gzip the whole stream not individual chunks?
>
> I want to serve to clients for example chunk1+chunk2 and chunk2+chunk1 etc
> (different order) but I don't want to compress the whole page every time
> and I dont want to cache the whole page. I want to use precompressed cached
> chunks and send them.
>
> nodejs code (node v0.10.7):
>
> // creating pre cached data buffersvar zlib = require('zlib');var chunk1,
> chunk2;
> zlib.gzip(new Buffer('test1'), function(err, data){
> chunk1 = data;});
> zlib.gzip(new Buffer('test2'), function(err, data){
> chunk2 = data;});
>
> var http = require('http');
> http.createServer(function (req, res) {
> res.writeHead(200, {'Content-Type': 'text/plain', 'Content-Encoding':
> 'gzip'});
> // writing two pre gziped buffers
> res.write(chunk1); // if I send only this one everything is OK
> res.write(chunk2); // if I send two chunks Chrome trying to download
> file
> res.end();}).listen(8080);
>
> When my example server returns this kind of response Chrome browser
> display download window (it doesnt understand it :/
>
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