/* parse the header */
apr_status_t ajp_parse_header(request_rec *r, proxy_dir_conf *conf,
ajp_msg_t *msg)
{
apr_byte_t result;
apr_status_t rc;
rc = ajp_msg_get_uint8(msg, &result);
if (rc != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00994)
"ajp_parse_headers: ajp_msg_get_byte failed");
return rc;
}
if (result != CMD_AJP13_SEND_HEADERS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00995)
"ajp_parse_headers: wrong type %s (0x%02x) expecting %s (0x%02x)",
ajp_type_str(result), result,
ajp_type_str(CMD_AJP13_SEND_HEADERS), CMD_AJP13_SEND_HEADERS);
return AJP_EBAD_HEADER;
}
return ajp_unmarshal_response(msg, r, conf);
}
static ngx_int_t
ngx_http_ajp_process_header(ngx_http_request_t *r)
{
u_char *pos, *last, type, reuse;
uint16_t length;
ngx_int_t rc;
ngx_buf_t *buf;
ajp_msg_t *msg;
ngx_http_ajp_ctx_t *a;
ngx_http_upstream_t *u;
ngx_http_ajp_loc_conf_t *alcf;
a = ngx_http_get_module_ctx(r, ngx_http_ajp_module);
alcf = ngx_http_get_module_loc_conf(r, ngx_http_ajp_module);
if (a == NULL || alcf == NULL) {
return NGX_ERROR;
}
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0,
"ngx_http_ajp_process_header: state(%d)", a->state);
u = r->upstream;
msg = ajp_msg_reuse(&a->msg);
buf = msg->buf = &u->buffer;
while (buf->pos < buf->last) {
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0,
"ngx_http_ajp_process_header: parse response, "
"pos:%p, last:%p", buf->pos, buf->last);
/* save the position for returning NGX_AGAIN */
pos = buf->pos;
last = buf->last;
if (ngx_buf_size(msg->buf) < AJP_HEADER_LEN + 1) {
return ngx_http_ajp_move_buffer(r, buf, pos, last);
}
rc = ajp_msg_parse_begin(msg);
if (rc != NGX_OK) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_ajp_process_header: bad header\n"
"%s", ajp_msg_dump(r->pool, msg, "bad header"));
return NGX_ERROR;
}
rc = ajp_msg_get_uint8(msg, (u_char *)&type);
if (rc != NGX_OK) {
return NGX_ERROR;
}
switch (type) {
case CMD_AJP13_GET_BODY_CHUNK:
rc = ajp_msg_get_uint16(msg, &length);
if (rc == AJP_EOVERFLOW) {
return ngx_http_ajp_move_buffer(r, buf, pos, last);
}
rc = ngx_http_upstream_send_request_body(r, u);
if (rc != NGX_OK) {
return rc;
}
break;
case CMD_AJP13_SEND_HEADERS:
rc = ajp_unmarshal_response(msg, r, alcf);
if (rc == NGX_OK) {
a->state = ngx_http_ajp_st_response_parse_headers_done;
return NGX_OK;
} else if (rc == AJP_EOVERFLOW) {
a->state = ngx_http_ajp_st_response_recv_headers;
/* reinit the headers_int list, the memory may be stale */
ngx_list_reinit(&u->headers_in.headers);
/* It's an uncomplete AJP packet, move back to the header
* of packet, and parse the header again in next call
*/
return ngx_http_ajp_move_buffer(r, buf, pos, last);
} else {
return NGX_ERROR;
}
break;
case CMD_AJP13_SEND_BODY_CHUNK:
buf->pos = pos;
a->state = ngx_http_ajp_st_response_body_data_sending;
/* input_filter function will process these data */
return NGX_OK;
case CMD_AJP13_END_RESPONSE:
rc = ajp_msg_get_uint8(msg, &reuse);
if (rc == AJP_EOVERFLOW) {
return ngx_http_ajp_move_buffer(r, buf, pos, last);
}
ngx_http_ajp_end_response(r, reuse);
buf->last_buf = 1;
return NGX_OK;
default:
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_ajp_process_header: "
"bad_packet_type(%d)\n%s",
type, ajp_msg_dump(r->pool, msg, "bad type"));
return NGX_ERROR;
}
}
return NGX_AGAIN;
}
