/**
* nginx handler to feed request body (if any) to IronBee
*
* @param[in] r the nginx request object
* @return NGX_DECLINED for normal operation
* @return NGX_DONE if body is not yet available (processing will resume
* on new data)
* @return Error status if set by IronBee on sight of request data.
*/
ngx_int_t ngxib_handler(ngx_http_request_t *r)
{
ngx_chain_t *link;
ngxib_req_ctx *ctx;
ngx_int_t rv = NGX_DECLINED;
ngx_http_request_body_t *rb;
/* Don't process internal requests */
if (r->internal)
return rv;
ctx = ngx_http_get_module_ctx(r, ngx_ironbee_module);
if (ctx->body_done)
return rv;
/* We already completed handling of no-body requests
* when we looked at headers
*/
if (!ngxib_has_request_body(r, ctx))
return rv;
ngx_regex_malloc_init(r->pool);
/* We can now read the body.
* This may come asynchronously in many chunks, so we need
* to check for AGAIN and return DONE if waiting.
* We pass it a handler to go round again while waiting.
*
* TODO: figure out how to pass data to ironbee asynchronously
*/
rv = ngx_http_read_client_request_body(r, ngxib_post_handler);
if (rv == NGX_AGAIN) {
ctx->body_wait = 1;
cleanup_return NGX_DONE;
}
/* We now have the request body. Feed it to ironbee */
rb = r->request_body;
if (!rb) {
ib_log_error_tx(ctx->tx, "Failed to read request body.");
cleanup_return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (!rb->bufs) {
/* I think this shouldn't happen */
/* But rethink if this turns up in logs when all is fine */
ib_log_error_tx(ctx->tx, "Probable error reading request body.");
}
if (rb->temp_file && (rb->temp_file->file.fd != NGX_INVALID_FILE)) {
/* Reader has put request body in temp file */
off_t count = 0;
u_char buf[BUFSIZE];
size_t buf_len;
ib_log_debug_tx(ctx->tx, "Reading request body in temp file.");
while (buf_len = ngx_read_file(&rb->temp_file->file,
buf, BUFSIZE, count),
buf_len > 0) {
ib_log_debug_tx(ctx->tx, "Feeding %zd bytes request data to ironbee.",
buf_len);
ib_state_notify_request_body_data(ctx->tx->ib, ctx->tx,
(const char*)buf, buf_len);
count += buf_len;
}
if ((int)buf_len == NGX_ERROR) {
ib_log_error_tx(ctx->tx, "Failed to read request body in temp file.");
}
}
for (link = rb->bufs; link != NULL; link = link->next) {
size_t len = (link->buf->last - link->buf->pos);
ib_log_debug_tx(ctx->tx, "Feeding %zd bytes request data to ironbee.",
len);
if (len > 0) {
ib_state_notify_request_body_data(ctx->tx->ib, ctx->tx,
(const char*)link->buf->pos, len);
}
}
ctx->body_done = 1;
ib_state_notify_request_finished(ctx->tx->ib, ctx->tx);
/* If IronBee signaled an error, we can return it */
if (STATUS_IS_ERROR(ctx->status)) {
rv = ctx->status;
ctx->internal_errordoc = 1;
ib_log_error_tx(ctx->tx, "IronBee set %d reading request body.", (int)rv);
}
cleanup_return rv;
}
/**
* nginx post-read-request handler to feed request line and headers to Ironbee.
*
* @param[in] r The nginx request object.
* @return Declined (ignoreme) or error status.
*/
static ngx_int_t ironbee_post_read_request(ngx_http_request_t *r)
{
ngx_log_t *prev_log;
ngxib_req_ctx *ctx;
ib_conn_t *iconn;
ib_parsed_req_line_t *rline;
ib_parsed_header_wrapper_t *ibhdrs;
ib_status_t rc;
ngx_list_part_t *part;
ngx_table_elt_t *hdr;
unsigned int i;
/* Don't process internal requests */
if (r->internal)
return NGX_DECLINED;
prev_log = ngxib_log(r->connection->log);
ngx_regex_malloc_init(r->pool);
ctx = ngx_pcalloc(r->pool, sizeof(ngxib_req_ctx));
ctx->r = r;
ngx_http_set_ctx(r, ctx, ngx_ironbee_module);
iconn = ngxib_conn_get(ctx, ironbee);
ib_tx_create(&ctx->tx, iconn, ctx);
/* Notify Ironbee of request line and headers */
rc = ib_parsed_req_line_create(ctx->tx, &rline,
(const char*)r->request_line.data,
r->request_line.len,
(const char*)r->method_name.data,
r->method_name.len,
(const char*)r->unparsed_uri.data,
r->unparsed_uri.len,
(const char*)r->http_protocol.data,
r->http_protocol.len);
if (rc != IB_OK)
cleanup_return(prev_log) NGX_ERROR;
ib_state_notify_request_started(ironbee, ctx->tx, rline);
rc = ib_parsed_name_value_pair_list_wrapper_create(&ibhdrs, ctx->tx);
if (rc != IB_OK)
cleanup_return(prev_log) NGX_ERROR;
for (part = &r->headers_in.headers.part; part != NULL; part = part->next) {
hdr = part->elts;
for (i = 0; i < part->nelts; ++i) {
ib_parsed_name_value_pair_list_add(ibhdrs,
(const char*)hdr->key.data,
hdr->key.len,
(const char*)hdr->value.data,
hdr->value.len);
++hdr;
}
}
rc = ib_state_notify_request_header_data(ironbee, ctx->tx, ibhdrs);
if (rc != IB_OK)
cleanup_return(prev_log) NGX_ERROR;
rc = ib_state_notify_request_header_finished(ironbee, ctx->tx);
if (rc != IB_OK)
cleanup_return(prev_log) NGX_ERROR;
if (!ngxib_has_request_body(r, ctx)) {
rc = ib_state_notify_request_finished(ironbee, ctx->tx);
if (rc != IB_OK)
cleanup_return(prev_log) NGX_ERROR;
}
ctx->hdrs_in = 1;
if (STATUS_IS_ERROR(ctx->status)) {
ctx->internal_errordoc = 1;
cleanup_return(prev_log) ctx->status;
}
cleanup_return(prev_log) NGX_DECLINED;
}