I am creating simple apache module to capture all HTTP traffic for real time processing by security software. My goal is to get headers and body from both request and response. So far I managed to get all i need except request body. What's the best way to get request body in output filter, or in any other hook/handler to get request-response "tuple" with all releated information ?
static apr_status_t ef_output_filter(ap_filter_t *f, apr_bucket_brigade *bb)
{
apr_status_t rv;
request_rec *r = f->r;
apr_bucket *e = APR_BRIGADE_FIRST(bb);
const char *data;
apr_size_t length;
std::ofstream outfile;
outfile.open("/var/log/apache2/test.txt", std::ios_base::app);
outfile << r->method << r->unparsed_uri << std::endl;
apr_table_do(loop_table, &outfile, r->headers_in, NULL);
//!!! READ REQUST BODY HERE !!!!
outfile << r->status << std::endl;
apr_table_do(loop_table, &outfile, r->headers_out, NULL);
outfile << std::endl;
while (e != APR_BRIGADE_SENTINEL(bb)) {
apr_bucket_read(e, &data, &length, APR_BLOCK_READ);
e = APR_BUCKET_NEXT(e);
outfile << data;
}
outfile.flush();
outfile.close();
return ap_pass_brigade(f->next, bb);
}
Any help appriciated
You can read the body from the request_rec pointer you're deriving from the ap_filter_t pointer variable.
So you'd go for something along the lines of:
char buffer[SOME_BUFER_SIZE];
int ret_code = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR);
if (ret_code == OK) {
if (ap_should_client_block(r)) {
int dataBytesRead = ap_get_client_block(r, buffer, SOME_BUFFER_SIZE);
...
}
}
As of writing, you can find more info here: https://docstore.mik.ua/orelly/apache_mod/139.htm or here: http://byteandbits.blogspot.com/2013/09/example-apache-module-for-reading.html
Hope it helps...
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