Proxying POST body through Varnish

[Paul Carey]

Hi

I've been trying out Varnish with CouchDB. CouchDB is a
document-oriented data store where documents are keyed by id. To
retrieve a list of documents from CouchDB a POST is made to
/db_name/_all_docs with a JSON encoded list of keys as the body.

For example:

curl -X POST -d '{"keys":["bar","foo"]}' 127.0.0.1/scratch/_all_docs

I'd like Varnish to cache these requests. My VCL config defines
vcl_recv and doesn't 'pass' on POSTs that match _all_docs. However,
CouchDB doesn't like the POST requests proxied through Varnish,
returning an error message stating 'invalid UTF-8 JSON'. I suspect
Varnish is stripping the POST body. I say this because when I run
varnishlog I see a Rx Content-Length header received by Varnish but
not a corresponding Tx header proxied to CouchDB.

If it's likely that this is what's happening, is there any many to get
Varnish to pass the POST body along?

Many thanks

Paul