Someome tried gzip encoding of http responses?

[Philipp Brüll]

Hi all,

I've implemented an asset server and tried to switch an gzip compression. Here is the code

response = request.response

response.headers["Content-Type"] = "text/javascript; charset=utf-8"

response.headers["Content-Encoding"] = "gzip"

response.end compress(code.to_s)

The compress method looks like this

def compress(data)

output = StringIO.new

gz = Zlib::GzipWriter.new output

gz.write data

gz.close

output.string

end

The asset is served, but Chrome drops a parser error after loading the asset. Any good idea?

Chrome Version 21.0.1180.89

JRuby 1.6.7.2

Vert.x 1.2.3

Best regards

[Pid]

On 02/09/2012 17:09, Philipp Brüll wrote:
> Hi all,
>
> I've implemented an asset server and tried to switch an gzip
> compression. Here is the code
>
> response = request.response
> response.headers["Content-Type"] = "text/javascript; charset=utf-8"
> response.headers["Content-Encoding"] = "gzip"
> response.end compress(code.to_s)

Have a look at the web-server module.

https://github.com/vert-x/mod-web-server/blob/master/src/main/java/org/vertx/mods/WebServer.java


p

> The compress method looks like this
>
> def compress(data)
>
> output = StringIO.new
>
> gz = Zlib::GzipWriter.new output
>
> gz.write data
>
> gz.close
>
> output.string
>
> end
>
>
> The asset is served, but Chrome drops a parser error after loading the
> asset. Any good idea?
>
> Chrome Version 21.0.1180.89
> JRuby 1.6.7.2
> Vert.x 1.2.3
>
> Best regards
>

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[Philipp Brüll]

Thanks for the fast reply!

Have a look at the web-server module.

 https://github.com/vert-x/mod-web-server/blob/master/src/main/java/org/vertx/mods/WebServer.java

I've seen that, but I would like to gzip things on-the-fly, because some of the assets are created on-the-fly too.

I didn't digged into detail, but seems that the toString encoding of the gzipped output causes to problem (what a surprise :-) ). I've implemented a workaround by using directly to java classes and wrap the result into a Vertx::Buffer which than respond. Here is the code:

data = compress code.to_s

response = request.response

response.headers["Content-Type"] = "text/javascript; charset=utf-8"

response.headers["Content-Encoding"] = "gzip"

response.headers["Content-Length"] = data.length

response.write_buffer data

response.end

The conpress method:

def compress(data)

buffer = java.io.ByteArrayOutputStream.new

stream = java.util.zip.GZIPOutputStream.new buffer

writer = java.io.OutputStreamWriter.new stream

writer.write data

writer.flush

writer.close

stream.finish

Vertx::Buffer.new org.vertx.java.core.buffer.Buffer.new(buffer.to_byte_array)

end

 

I could think of a better solution, where the response is not processed at once and pumped into the response stream, but this is working for now.