Can a compressed response be sent back to client even though the response from the backend is not?

[vbalan]

Hi,

We have a requirement to send compressed response back to client. But the service provider doesn't provide compressed data to Apigee.

I tried setting 
<Property name="compression.algorithm">gzip</Property>

under HTTPProxyConnection but the response came back with the header "Transfer-Encoding = chunked"

Thanks in advance!

[dchiesa1 · Accepted solution]

You can tell Apigee to compress the response before sending it to the client.

To do so, set the Content-Encoding header in the response message, in the response flow. You can do that with an AssignMessage policy attached in the appropriate place:

<AssignMessage name="AM-Set-Compress-Response">
    <Set>
        <Headers>
            <Header name="Content-Encoding">gzip</Header>
        </Headers>
    </Set>
</AssignMessage>

Apigee will then magically compress the response. 

[vbalan]

Thank you Dino! I'll try this out and let you know. Thanks for the quick response.

[vbalan]

Since our proxy is common to multiple APIs, we came up with an alternate solution instead of adding the 'Assign Message' policy. We have a javascriptCallout where we add custom functions for those APIs that need additional processing. There, we set this response header for the API that needs a gzip response.

"Content-Encoding"=gzip

[dchiesa1]

Nice! Glad it's working well for you.