| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000-2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * Portions of this software are based upon public domain software |
| * (zlib functions gz_open and gzwrite) |
| */ |
| |
| /* |
| * mod_bucketeer.c: split buckets whenever we find a control-char |
| * |
| * Written by Ian Holsman (IanH@apache.org) |
| * |
| */ |
| |
| #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" |
| |
| |
| static const char bucketeerFilterName[] = "BUCKETEER"; |
| module AP_MODULE_DECLARE_DATA bucketeer_module; |
| |
| typedef struct bucketeer_filter_config_t |
| { |
| char bucketdelimter; |
| 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->bucketdelimter = 0x02; /* ^B */ |
| 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 = ap_get_module_config(r->server->module_config, |
| &bucketeer_module); |
| |
| /* If we don't have a context, we need to ensure that it is okay to send |
| * the deflated content. If we have a context, that means we've done |
| * this before and we liked it. |
| * This could be not so nice if we always fail. But, if we succeed, |
| * we're in better shape. |
| */ |
| if (!ctx) { |
| if (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); |
| } |
| |
| APR_BRIGADE_FOREACH(e, bb) { |
| const char *data; |
| apr_size_t len; |
| |
| int done = 0; |
| apr_size_t i; |
| apr_size_t 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; |
| } |
| |
| /* 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 ) { |
| 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); |
| APR_BRIGADE_INSERT_TAIL(ctx->bb,p); |
| } |
| lastpos=i+1; |
| |
| p = apr_bucket_flush_create(); |
| APR_BRIGADE_INSERT_TAIL(ctx->bb,p); |
| |
| } |
| else { |
| if (data[i] == c->bucketdelimter) { |
| 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); |
| |
| APR_BRIGADE_INSERT_TAIL(ctx->bb,p); |
| } |
| lastpos=i+1; |
| } |
| } |
| } |
| /* 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); |
| 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, |
| AP_FTYPE_CONTENT-1); |
| } |
| |
| static const command_rec bucketeer_filter_cmds[] = { |
| {NULL} |
| }; |
| |
| module AP_MODULE_DECLARE_DATA bucketeer_module = { |
| STANDARD20_MODULE_STUFF, |
| NULL, |
| NULL, |
| create_bucketeer_server_config, |
| NULL, |
| bucketeer_filter_cmds, |
| register_hooks |
| }; |
