int uwsgi_response_sendfile_do(struct wsgi_request *wsgi_req, int fd, size_t pos, size_t len) {
int can_close = 1;
if (fd == wsgi_req->sendfile_fd) can_close = 0;
if (wsgi_req->write_errors) return -1;
if (!wsgi_req->headers_sent) {
int ret = uwsgi_response_write_headers_do(wsgi_req);
if (ret == UWSGI_OK) goto sendfile;
if (ret == UWSGI_AGAIN) return UWSGI_AGAIN;
wsgi_req->write_errors++;
if (can_close) close(fd);
return -1;
}
sendfile:
if (len == 0) {
struct stat st;
if (fstat(fd, &st)) {
uwsgi_error("fstat()");
wsgi_req->write_errors++;
if (can_close) close(fd);
return -1;
}
if (pos >= (size_t)st.st_size) return UWSGI_OK;
len = st.st_size;
}
if (wsgi_req->socket->can_offload) {
// of we cannot close the socket (before the app will close it later)
// let's dup it
if (!can_close) {
int tmp_fd = dup(fd);
if (tmp_fd < 0) {
uwsgi_error("uwsgi_response_sendfile_do()/dup()");
wsgi_req->write_errors++;
return -1;
}
fd = tmp_fd;
can_close = 1;
}
if (!uwsgi_offload_request_sendfile_do(wsgi_req, fd, len)) {
wsgi_req->via = UWSGI_VIA_OFFLOAD;
wsgi_req->response_size += len;
return 0;
}
wsgi_req->write_errors++;
if (can_close) close(fd);
return -1;
}
wsgi_req->via = UWSGI_VIA_SENDFILE;
for(;;) {
int ret = wsgi_req->socket->proto_sendfile(wsgi_req, fd, pos, len);
if (ret < 0) {
if (!uwsgi.ignore_write_errors) {
uwsgi_error("uwsgi_response_sendfile_do()");
}
wsgi_req->write_errors++;
if (can_close) close(fd);
return -1;
}
if (ret == UWSGI_OK) {
break;
}
ret = uwsgi_wait_write_req(wsgi_req);
if (ret < 0) {
wsgi_req->write_errors++;
if (can_close) close(fd);
return -1;
}
if (ret == 0) {
uwsgi_log("uwsgi_response_sendfile_do() TIMEOUT !!!\n");
wsgi_req->write_errors++;
return -1;
}
}
wsgi_req->response_size += wsgi_req->write_pos;
// reset for the next write
wsgi_req->write_pos = 0;
// close the file descriptor
if (can_close) close(fd);
return UWSGI_OK;
}
int uwsgi_routing_func_fastfile(struct wsgi_request *wsgi_req, struct uwsgi_route *ur) {
struct stat st;
int ret = UWSGI_ROUTE_BREAK;
struct uwsgi_router_file_conf *urfc = (struct uwsgi_router_file_conf *) ur->data2;
char **subject = (char **) (((char *)(wsgi_req))+ur->subject);
uint16_t *subject_len = (uint16_t *) (((char *)(wsgi_req))+ur->subject_len);
struct uwsgi_buffer *ub = uwsgi_routing_translate(wsgi_req, ur, *subject, *subject_len, urfc->filename, urfc->filename_len);
if (!ub) return UWSGI_ROUTE_BREAK;
int fd = open(ub->buf, O_RDONLY);
if (fd < 0) {
if (ur->custom)
ret = UWSGI_ROUTE_NEXT;
goto end;
}
if (fstat(fd, &st)) {
goto end2;
}
struct uwsgi_buffer *ub_s = uwsgi_routing_translate(wsgi_req, ur, *subject, *subject_len, urfc->status, urfc->status_len);
if (!ub_s) goto end2;
// static file - don't update avg_rt after request
wsgi_req->do_not_account_avg_rt = 1;
if (urfc->no_headers) {
uwsgi_buffer_destroy(ub_s);
goto send;
}
if (uwsgi_response_prepare_headers(wsgi_req, ub_s->buf, ub_s->pos)) {
uwsgi_buffer_destroy(ub_s);
goto end2;
}
uwsgi_buffer_destroy(ub_s);
if (uwsgi_response_add_content_length(wsgi_req, st.st_size)) goto end2;
if (urfc->mime) {
size_t mime_type_len = 0;
char *mime_type = uwsgi_get_mime_type(ub->buf, ub->pos, &mime_type_len);
if (mime_type) {
if (uwsgi_response_add_content_type(wsgi_req, mime_type, mime_type_len)) goto end2;
}
else {
if (uwsgi_response_add_content_type(wsgi_req, urfc->content_type, urfc->content_type_len)) goto end2;
}
}
else {
if (uwsgi_response_add_content_type(wsgi_req, urfc->content_type, urfc->content_type_len)) goto end2;
}
send:
if (!wsgi_req->headers_sent) {
if (uwsgi_response_write_headers_do(wsgi_req)) goto end2;
}
if (wsgi_req->socket->can_offload) {
if (!uwsgi_offload_request_sendfile_do(wsgi_req, fd, st.st_size)) {
wsgi_req->via = UWSGI_VIA_OFFLOAD;
wsgi_req->response_size += st.st_size;
// the fd will be closed by the offload engine
goto end;
}
}
if (!uwsgi_simple_sendfile(wsgi_req, fd, 0, st.st_size)) {
wsgi_req->via = UWSGI_VIA_SENDFILE;
wsgi_req->response_size += st.st_size;
}
end2:
close(fd);
end:
uwsgi_buffer_destroy(ub);
return ret;
}