src/http/modules/xxslt/ngx_http_xxslt_udata.c

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/*
 *  Copyright 2009 DreamLab Onet.pl Sp. z o.o.
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 *
 * Authors:
 * Przemyslaw Gajda, email: quermit(malpa)gmail.com
 * Piotr Janik, email: janik.piotrek(malpa)gmail.com
 *                                                                       malpa = @
 */

#include "ngx_http_xxslt_udata.h"
#include "ngx_http_xxslt_selector.h"

ngx_http_xxslt_unknown_data_t *
ngx_http_xxslt_unknown_create_new(ngx_http_request_t *r)
{
        ngx_http_xxslt_unknown_data_t *data;
        data = ngx_pcalloc(r->pool, sizeof(ngx_http_xxslt_unknown_data_t));
        if( data == NULL ) {
                ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                                "[unknown_create_new] alloc fail.");
                return NULL;
        }

        data->r = r;

        return data;
}

ngx_int_t  
ngx_http_xxslt_unknown_add_data_chunk(ngx_http_xxslt_unknown_data_t *data, ngx_chain_t *in)
{
        ngx_http_request_t              *r;
        ngx_chain_t                             *cl;
        ngx_chain_t                             *cl_end;

        r = data->r;


        if( in == NULL ) {
                ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                        "[unknown_add_data_chunk] alloc fail");
                return ngx_http_xxslt_finalize_with_error(r, 
                        NGX_HTTP_INTERNAL_SERVER_ERROR, NULL);
        }

        cl = in;
        while( cl ) {
                cl_end = cl;

                data->res_len += cl->buf->last - cl->buf->pos;

                if( cl->buf->last - cl->buf->pos == 0 ) {
                        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                                        "[unknown_add_data_chunk] empty buffer.");
                        return ngx_http_xxslt_finalize_with_error(r, 
                                NGX_HTTP_INTERNAL_SERVER_ERROR, NULL);
                }
                cl = cl->next;
        }

        if( data->buffer_chain == NULL ) {
                data->buffer_chain = in;
        }
        else {
                data->buffer_chain_tail->next = in;
        }

        data->buffer_chain_tail = cl_end;

        if( cl_end->buf->last_in_chain ) {
                ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                                "[unknown_add_data_chunk] finalizing. %d", (ngx_int_t) data);

                data->done = 1;
                ngx_http_xxslt_process_data(r);
        }
        return NGX_OK;
}

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