Function h2_protocol_switch

modules/http2/h2_switch.c:154–215

#endif

static int h2_protocol_switch(conn_rec *c, request_rec *r, server_rec *s,
                              const char *protocol)
{
    int found = 0;
    const char **protos = ap_ssl_conn_is_ssl(c)? h2_protocol_ids_tls : h2_protocol_ids_clear;
    const char **p = protos;
    
    (void)s;
    if (!h2_mpm_supported()) {
        return DECLINED;
    }

    while (*p) {
        if (!strcmp(*p, protocol)) {
            found = 1;
            break;
        }
        p++;
    }
    
    if (found) {
        ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
                      "switching protocol to '%s'", protocol);
        h2_conn_ctx_create_for_c1(c, s, protocol);

        if (r != NULL) {
            apr_status_t status;
#if AP_HAS_RESPONSE_BUCKETS
            /* Switching in the middle of a request means that
             * we have to send out the response to this one in h2
             * format. So we need to take over the connection
             * and remove all old filters with type up to the
             * CONNEDCTION/NETWORK ones.
             */
            remove_input_filters_below(r->input_filters, AP_FTYPE_CONNECTION);
            remove_output_filters_below(r->output_filters, AP_FTYPE_CONNECTION);
#else
            /* Switching in the middle of a request means that
             * we have to send out the response to this one in h2
             * format. So we need to take over the connection
             * right away.
             */
            ap_remove_input_filter_byhandle(r->input_filters, "http_in");
            ap_remove_output_filter_byhandle(r->output_filters, "HTTP_HEADER");
#endif
            /* Ok, start an h2_conn on this one. */
            status = h2_c1_setup(c, r, s);
            
            if (status != APR_SUCCESS) {
                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, status, r, APLOGNO(03088)
                              "session setup");
                h2_conn_ctx_detach(c);
                return !OK;
            }
            
            h2_c1_run(c);
        }
        return OK;