| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000-2003 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/>. |
| */ |
| |
| /* |
| * An example input filter - this converts input to upper case. Note that |
| * because of the moment it gets inserted it does NOT convert request headers. |
| */ |
| |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "apr_buckets.h" |
| #include "apr_general.h" |
| #include "apr_lib.h" |
| #include "util_filter.h" |
| #include "http_request.h" |
| |
| #include <ctype.h> |
| |
| static const char s_szCaseFilterName[] = "CaseFilterIn"; |
| module AP_MODULE_DECLARE_DATA case_filter_in_module; |
| |
| typedef struct |
| { |
| int bEnabled; |
| } CaseFilterInConfig; |
| |
| typedef struct |
| { |
| apr_bucket_brigade *pbbTmp; |
| } CaseFilterInContext; |
| |
| static void *CaseFilterInCreateServerConfig(apr_pool_t *p, server_rec *s) |
| { |
| CaseFilterInConfig *pConfig = apr_pcalloc(p, sizeof *pConfig); |
| |
| pConfig->bEnabled = 0; |
| |
| return pConfig; |
| } |
| |
| static void CaseFilterInInsertFilter(request_rec *r) |
| { |
| CaseFilterInConfig *pConfig=ap_get_module_config(r->server->module_config, |
| &case_filter_in_module); |
| if(!pConfig->bEnabled) |
| return; |
| |
| ap_add_input_filter(s_szCaseFilterName,NULL,r,r->connection); |
| } |
| |
| static apr_status_t CaseFilterInFilter(ap_filter_t *f, |
| apr_bucket_brigade *pbbOut, |
| ap_input_mode_t eMode, |
| apr_read_type_e eBlock, |
| apr_off_t nBytes) |
| { |
| request_rec *r = f->r; |
| conn_rec *c = r->connection; |
| CaseFilterInContext *pCtx; |
| apr_status_t ret; |
| |
| if (!(pCtx = f->ctx)) { |
| f->ctx = pCtx = apr_palloc(r->pool, sizeof *pCtx); |
| pCtx->pbbTmp = apr_brigade_create(r->pool, c->bucket_alloc); |
| } |
| |
| if (APR_BRIGADE_EMPTY(pCtx->pbbTmp)) { |
| ret = ap_get_brigade(f->next, pCtx->pbbTmp, eMode, eBlock, nBytes); |
| |
| if (eMode == AP_MODE_EATCRLF || ret != APR_SUCCESS) |
| return ret; |
| } |
| |
| while(!APR_BRIGADE_EMPTY(pCtx->pbbTmp)) { |
| apr_bucket *pbktIn = APR_BRIGADE_FIRST(pCtx->pbbTmp); |
| apr_bucket *pbktOut; |
| const char *data; |
| apr_size_t len; |
| char *buf; |
| int n; |
| |
| /* It is tempting to do this... |
| * APR_BUCKET_REMOVE(pB); |
| * APR_BRIGADE_INSERT_TAIL(pbbOut,pB); |
| * and change the case of the bucket data, but that would be wrong |
| * for a file or socket buffer, for example... |
| */ |
| |
| if(APR_BUCKET_IS_EOS(pbktIn)) { |
| APR_BUCKET_REMOVE(pbktIn); |
| APR_BRIGADE_INSERT_TAIL(pbbOut, pbktIn); |
| break; |
| } |
| |
| ret=apr_bucket_read(pbktIn, &data, &len, eBlock); |
| if(ret != APR_SUCCESS) |
| return ret; |
| |
| buf = malloc(len); |
| for(n=0 ; n < len ; ++n) |
| buf[n] = apr_toupper(data[n]); |
| |
| pbktOut = apr_bucket_heap_create(buf, len, 0, c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(pbbOut, pbktOut); |
| apr_bucket_delete(pbktIn); |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| |
| static const char *CaseFilterInEnable(cmd_parms *cmd, void *dummy, int arg) |
| { |
| CaseFilterInConfig *pConfig |
| = ap_get_module_config(cmd->server->module_config, |
| &case_filter_in_module); |
| pConfig->bEnabled=arg; |
| |
| return NULL; |
| } |
| |
| static const command_rec CaseFilterInCmds[] = |
| { |
| AP_INIT_FLAG("CaseFilterIn", CaseFilterInEnable, NULL, RSRC_CONF, |
| "Run an input case filter on this host"), |
| { NULL } |
| }; |
| |
| |
| static void CaseFilterInRegisterHooks(apr_pool_t *p) |
| { |
| ap_hook_insert_filter(CaseFilterInInsertFilter, NULL, NULL, |
| APR_HOOK_MIDDLE); |
| ap_register_input_filter(s_szCaseFilterName, CaseFilterInFilter, NULL, |
| AP_FTYPE_RESOURCE); |
| } |
| |
| module AP_MODULE_DECLARE_DATA case_filter_in_module = |
| { |
| STANDARD20_MODULE_STUFF, |
| NULL, |
| NULL, |
| CaseFilterInCreateServerConfig, |
| NULL, |
| CaseFilterInCmds, |
| CaseFilterInRegisterHooks |
| }; |
