get_asset.c

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/**
 * \file
 *
 * \author  Georg Hopp
 *
 * \copyright
 * Copyright © 2012  Georg Hopp
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <sys/types.h>
#include <time.h>

#include "http/header.h"
#include "http/message.h"
#include "http/request.h"
#include "http/response.h"
#include "http/worker.h"

#include "utils/memory.h"
#include "hash.h"

HttpMessage
httpWorkerGetAsset(HttpWorker this, const char * fname)
{
    char *      match;
    size_t      nmatch;
    HttpHeader  header;
    HttpMessage message;

    size_t nfname = strlen(fname);

    header = hashGet(
            ((HttpMessage)this->current_request)->header,
            CSTRA("If-None-Match"));

    if (NULL == header) {
        match  = "";
        nmatch = 0;
    }
    else {
        match  = (header->value)[0];
        nmatch = (header->nvalue)[0];
    }

    /*
     * assets expire after 12 hours...
     */
    message = (HttpMessage)httpResponseAsset(
            fname,
            nfname,
            time(NULL) + 43200);

    if (NULL == message) {
        return (HttpMessage)httpResponse404();
    }

    if (message->asset->netag == nmatch
            && 0 == memcmp(message->asset->etag, match, nmatch)) {
        HttpMessage new_message;

        new_message = (HttpMessage)httpResponse304(
                message->asset->mime_type, message->asset->nmime_type,
                message->asset->etag, message->asset->netag,
                message->asset->mtime, message->asset->nmtime);

        delete(message);

        return new_message;
    }   

    return message;
}

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