Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/C/Apache/modules/debugging/ (Apache Software Stiftung Version 2.4.65^©) Datei vom 6.5.2010 mit Größe 5 kB

Quelle mod_bucketeer.c Sprache: C

/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/

/*
* mod_bucketeer.c: split buckets whenever we find a control-char
*
* Written by Ian Holsman
*
*/

#include "httpd.h"
#include "http_config.h"
#include "http_log.h"
#include "apr_strings.h"
#include "apr_general.h"
#include "util_filter.h"
#include "apr_buckets.h"
#include "http_request.h"
#include "http_protocol.h"

static const char bucketeerFilterName[] = "BUCKETEER";
module AP_MODULE_DECLARE_DATA bucketeer_module;

typedef struct bucketeer_filter_config_t
{
    char bucketdelimiter;
    char passdelimiter;
    char flushdelimiter;
} bucketeer_filter_config_t;

static void *create_bucketeer_server_config(apr_pool_t *p, server_rec *s)
{
    bucketeer_filter_config_t *c = apr_pcalloc(p, sizeof *c);

    c->bucketdelimiter = 0x02; /* ^B */
    c->passdelimiter = 0x10;   /* ^P */
    c->flushdelimiter = 0x06;  /* ^F */

    return c;
}

typedef struct bucketeer_ctx_t
{
    apr_bucket_brigade *bb;
} bucketeer_ctx_t;

static apr_status_t bucketeer_out_filter(ap_filter_t *f,
                                         apr_bucket_brigade *bb)
{
    apr_bucket *e;
    request_rec *r = f->r;
    bucketeer_ctx_t *ctx = f->ctx;
    bucketeer_filter_config_t *c;

    c = ap_get_module_config(r->server->module_config, &bucketeer_module);

    /* If have a context, it means we've done this before successfully. */
    if (!ctx) {
        if (!r->content_type || strncmp(r->content_type, "text/", 5)) {
            ap_remove_output_filter(f);
            return ap_pass_brigade(f->next, bb);
        }

        /* We're cool with filtering this. */
        ctx = f->ctx = apr_pcalloc(f->r->pool, sizeof(*ctx));
        ctx->bb = apr_brigade_create(f->r->pool, f->c->bucket_alloc);
        apr_table_unset(f->r->headers_out, "Content-Length");
    }

    for (e = APR_BRIGADE_FIRST(bb);
         e != APR_BRIGADE_SENTINEL(bb);
         e = APR_BUCKET_NEXT(e))
    {
        const char *data;
        apr_size_t len, i, lastpos;

        if (APR_BUCKET_IS_EOS(e)) {
            APR_BUCKET_REMOVE(e);
            APR_BRIGADE_INSERT_TAIL(ctx->bb, e);

            /* Okay, we've seen the EOS.
             * Time to pass it along down the chain.
             */
            return ap_pass_brigade(f->next, ctx->bb);
        }

        if (APR_BUCKET_IS_FLUSH(e)) {
            /*
             * Ignore flush buckets for the moment..
             * we decide what to stream
             */
            continue;
        }

        if (APR_BUCKET_IS_METADATA(e)) {
            /* metadata bucket */
            apr_bucket *cpy;
            apr_bucket_copy(e, &cpy);
            APR_BRIGADE_INSERT_TAIL(ctx->bb, cpy);
            continue;
        }

        /* read */
        apr_bucket_read(e, &data, &len, APR_BLOCK_READ);

        if (len > 0) {
            lastpos = 0;
            for (i = 0; i < len; i++) {
                if (data[i] == c->flushdelimiter ||
                    data[i] == c->bucketdelimiter ||
                    data[i] == c->passdelimiter) {
                    apr_bucket *p;
                    if (i - lastpos > 0) {
                        p = apr_bucket_pool_create(apr_pmemdup(f->r->pool,
                                                               &data[lastpos],
                                                               i - lastpos),
                                                    i - lastpos,
                                                    f->r->pool,
                                                    f->c->bucket_alloc);
                        APR_BRIGADE_INSERT_TAIL(ctx->bb, p);
                    }
                    lastpos = i + 1;
                    if (data[i] == c->flushdelimiter) {
                        p = apr_bucket_flush_create(f->c->bucket_alloc);
                        APR_BRIGADE_INSERT_TAIL(ctx->bb, p);
                    }
                    if (data[i] == c->passdelimiter) {
                        apr_status_t rv;

                        rv = ap_pass_brigade(f->next, ctx->bb);
                        if (rv) {
                            return rv;
                        }
                    }
                }
            }
            /* XXX: really should append this to the next 'real' bucket */
            if (lastpos < i) {
                apr_bucket *p;
                p = apr_bucket_pool_create(apr_pmemdup(f->r->pool,
                                                       &data[lastpos],
                                                       i - lastpos),
                                           i - lastpos,
                                           f->r->pool,
                                           f->c->bucket_alloc);
                lastpos = i;
                APR_BRIGADE_INSERT_TAIL(ctx->bb, p);
            }
        }
    }

    return APR_SUCCESS;
}

static void register_hooks(apr_pool_t * p)
{
    ap_register_output_filter(bucketeerFilterName, bucketeer_out_filter,
                              NULL, AP_FTYPE_RESOURCE-1);
}

static const command_rec bucketeer_filter_cmds[] = {
    {NULL}
};

AP_DECLARE_MODULE(bucketeer) = {
    STANDARD20_MODULE_STUFF,
    NULL,
    NULL,
    create_bucketeer_server_config,
    NULL,
    bucketeer_filter_cmds,
    register_hooks
};

quality71%

¤ Dauer der Verarbeitung: 0.15 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.