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From: Evgeny Shvidky <evgeny@skyfence.com>
To: "modules-dev@httpd.apache.org" <modules-dev@httpd.apache.org>
Subject: RPC over HTTP
Thread-Topic: RPC over HTTP
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Date: Wed, 3 Oct 2012 09:57:50 +0000
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Hi,

I am developing a new module on C.
One of the requirements of my module is to receive and handle RPC over HTTP=
 protocol.
RPC over HTTP opens two HTTP/1.1 requests:
One with request method RPC_IN_DATA to send data to the server, and second =
one with method RPC_OUT_DATA to send data back to the client. The body cons=
ists of raw binary data, and the connections are apparently re-used for sev=
eral RPCs.
Here's an example of an IN connection header:
    RPC_IN_DATA /rpc/rpcproxy.dll?<exchange>:6002 HTTP/1.1
    Content-Length: 1073741824
    ...
After connections are established client sends on "IN" channel RPC message =
with 104 bytes.

I use the following apache API's in order to read these client message.
ap_setup_client_block(userReq, REQUEST_CHUNKED_ERROR);
ap_should_client_block(userReq)
ap_get_client_block(userReq, buf, size)

The problem is "ap_should_client_block" function returns "1" (means there i=
s message to read) but "ap_get_client_block" returns error (-1) and nothing=
 read.

How should I read client's data?
Is there any other API for it?

Thanks,
Evgeny

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