| /* 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_vhost_alias.c: support for dynamically configured mass virtual hosting |
| * |
| * Copyright (c) 1998-1999 Demon Internet Ltd. |
| * |
| * This software was submitted by Demon Internet to the Apache Software Foundation |
| * in May 1999. Future revisions and derivatives of this source code |
| * must acknowledge Demon Internet as the original contributor of |
| * this module. All other licensing and usage conditions are those |
| * of the Apache Software Foundation. |
| * |
| * Originally written by Tony Finch <fanf@demon.net> <dot@dotat.at>. |
| * |
| * Implementation ideas were taken from mod_alias.c. The overall |
| * concept is derived from the OVERRIDE_DOC_ROOT/OVERRIDE_CGIDIR |
| * patch to Apache 1.3b3 and a similar feature in Demon's thttpd, |
| * both written by James Grinter <jrg@blodwen.demon.co.uk>. |
| */ |
| |
| #include "apr.h" |
| #include "apr_strings.h" |
| #include "ap_hooks.h" |
| #include "apr_lib.h" |
| |
| #define APR_WANT_STRFUNC |
| #include "apr_want.h" |
| |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "http_core.h" |
| #include "http_request.h" /* for ap_hook_translate_name */ |
| |
| |
| module AP_MODULE_DECLARE_DATA vhost_alias_module; |
| |
| |
| /* |
| * basic configuration things |
| * we abbreviate "mod_vhost_alias" to "mva" for shorter names |
| */ |
| |
| typedef enum { |
| VHOST_ALIAS_UNSET, VHOST_ALIAS_NONE, VHOST_ALIAS_NAME, VHOST_ALIAS_IP |
| } mva_mode_e; |
| |
| /* |
| * Per-server module config record. |
| */ |
| typedef struct mva_sconf_t { |
| const char *doc_root; |
| const char *cgi_root; |
| mva_mode_e doc_root_mode; |
| mva_mode_e cgi_root_mode; |
| } mva_sconf_t; |
| |
| static void *mva_create_server_config(apr_pool_t *p, server_rec *s) |
| { |
| mva_sconf_t *conf; |
| |
| conf = (mva_sconf_t *) apr_pcalloc(p, sizeof(mva_sconf_t)); |
| conf->doc_root = NULL; |
| conf->cgi_root = NULL; |
| conf->doc_root_mode = VHOST_ALIAS_UNSET; |
| conf->cgi_root_mode = VHOST_ALIAS_UNSET; |
| return conf; |
| } |
| |
| static void *mva_merge_server_config(apr_pool_t *p, void *parentv, void *childv) |
| { |
| mva_sconf_t *parent = (mva_sconf_t *) parentv; |
| mva_sconf_t *child = (mva_sconf_t *) childv; |
| mva_sconf_t *conf; |
| |
| conf = (mva_sconf_t *) apr_pcalloc(p, sizeof(*conf)); |
| if (child->doc_root_mode == VHOST_ALIAS_UNSET) { |
| conf->doc_root_mode = parent->doc_root_mode; |
| conf->doc_root = parent->doc_root; |
| } |
| else { |
| conf->doc_root_mode = child->doc_root_mode; |
| conf->doc_root = child->doc_root; |
| } |
| if (child->cgi_root_mode == VHOST_ALIAS_UNSET) { |
| conf->cgi_root_mode = parent->cgi_root_mode; |
| conf->cgi_root = parent->cgi_root; |
| } |
| else { |
| conf->cgi_root_mode = child->cgi_root_mode; |
| conf->cgi_root = child->cgi_root; |
| } |
| return conf; |
| } |
| |
| |
| /* |
| * These are just here to tell us what vhost_alias_set should do. |
| * We don't put anything into them; we just use the cell addresses. |
| */ |
| static int vhost_alias_set_doc_root_ip, |
| vhost_alias_set_cgi_root_ip, |
| vhost_alias_set_doc_root_name, |
| vhost_alias_set_cgi_root_name; |
| |
| static const char *vhost_alias_set(cmd_parms *cmd, void *dummy, const char *map) |
| { |
| mva_sconf_t *conf; |
| mva_mode_e mode, *pmode; |
| const char **pmap; |
| const char *p; |
| |
| conf = (mva_sconf_t *) ap_get_module_config(cmd->server->module_config, |
| &vhost_alias_module); |
| /* there ought to be a better way of doing this */ |
| if (&vhost_alias_set_doc_root_ip == cmd->info) { |
| mode = VHOST_ALIAS_IP; |
| pmap = &conf->doc_root; |
| pmode = &conf->doc_root_mode; |
| } |
| else if (&vhost_alias_set_cgi_root_ip == cmd->info) { |
| mode = VHOST_ALIAS_IP; |
| pmap = &conf->cgi_root; |
| pmode = &conf->cgi_root_mode; |
| } |
| else if (&vhost_alias_set_doc_root_name == cmd->info) { |
| mode = VHOST_ALIAS_NAME; |
| pmap = &conf->doc_root; |
| pmode = &conf->doc_root_mode; |
| } |
| else if (&vhost_alias_set_cgi_root_name == cmd->info) { |
| mode = VHOST_ALIAS_NAME; |
| pmap = &conf->cgi_root; |
| pmode = &conf->cgi_root_mode; |
| } |
| else { |
| return "INTERNAL ERROR: unknown command info"; |
| } |
| |
| if (!ap_os_is_path_absolute(cmd->pool, map)) { |
| if (ap_cstr_casecmp(map, "none")) { |
| return "format string must be an absolute path, or 'none'"; |
| } |
| *pmap = NULL; |
| *pmode = VHOST_ALIAS_NONE; |
| return NULL; |
| } |
| |
| /* sanity check */ |
| p = map; |
| while (*p != '\0') { |
| if (*p++ != '%') { |
| continue; |
| } |
| /* we just found a '%' */ |
| if (*p == 'p' || *p == '%') { |
| ++p; |
| continue; |
| } |
| /* optional dash */ |
| if (*p == '-') { |
| ++p; |
| } |
| /* digit N */ |
| if (apr_isdigit(*p)) { |
| ++p; |
| } |
| else { |
| return "syntax error in format string"; |
| } |
| /* optional plus */ |
| if (*p == '+') { |
| ++p; |
| } |
| /* do we end here? */ |
| if (*p != '.') { |
| continue; |
| } |
| ++p; |
| /* optional dash */ |
| if (*p == '-') { |
| ++p; |
| } |
| /* digit M */ |
| if (apr_isdigit(*p)) { |
| ++p; |
| } |
| else { |
| return "syntax error in format string"; |
| } |
| /* optional plus */ |
| if (*p == '+') { |
| ++p; |
| } |
| } |
| *pmap = map; |
| *pmode = mode; |
| return NULL; |
| } |
| |
| static const command_rec mva_commands[] = |
| { |
| AP_INIT_TAKE1("VirtualScriptAlias", vhost_alias_set, |
| &vhost_alias_set_cgi_root_name, RSRC_CONF, |
| "how to create a ScriptAlias based on the host"), |
| AP_INIT_TAKE1("VirtualDocumentRoot", vhost_alias_set, |
| &vhost_alias_set_doc_root_name, RSRC_CONF, |
| "how to create the DocumentRoot based on the host"), |
| AP_INIT_TAKE1("VirtualScriptAliasIP", vhost_alias_set, |
| &vhost_alias_set_cgi_root_ip, RSRC_CONF, |
| "how to create a ScriptAlias based on the host"), |
| AP_INIT_TAKE1("VirtualDocumentRootIP", vhost_alias_set, |
| &vhost_alias_set_doc_root_ip, RSRC_CONF, |
| "how to create the DocumentRoot based on the host"), |
| { NULL } |
| }; |
| |
| |
| /* |
| * This really wants to be a nested function |
| * but C is too feeble to support them. |
| */ |
| static APR_INLINE void vhost_alias_checkspace(request_rec *r, char *buf, |
| char **pdest, int size) |
| { |
| /* XXX: what if size > HUGE_STRING_LEN? */ |
| if (*pdest + size > buf + HUGE_STRING_LEN) { |
| **pdest = '\0'; |
| if (r->filename) { |
| r->filename = apr_pstrcat(r->pool, r->filename, buf, NULL); |
| } |
| else { |
| r->filename = apr_pstrdup(r->pool, buf); |
| } |
| *pdest = buf; |
| } |
| } |
| |
| static void vhost_alias_interpolate(request_rec *r, const char *name, |
| const char *map, const char *uri) |
| { |
| /* 0..9 9..0 */ |
| enum { MAXDOTS = 19 }; |
| const char *dots[MAXDOTS+1]; |
| int ndots; |
| |
| char buf[HUGE_STRING_LEN]; |
| char *dest; |
| const char *docroot; |
| |
| int N, M, Np, Mp, Nd, Md; |
| const char *start, *end; |
| |
| const char *p; |
| |
| ndots = 0; |
| dots[ndots++] = name-1; /* slightly naughty */ |
| for (p = name; *p; ++p) { |
| if (*p == '.' && ndots < MAXDOTS) { |
| dots[ndots++] = p; |
| } |
| } |
| dots[ndots] = p; |
| |
| r->filename = NULL; |
| |
| dest = buf; |
| while (*map) { |
| if (*map != '%') { |
| /* normal characters */ |
| vhost_alias_checkspace(r, buf, &dest, 1); |
| *dest++ = *map++; |
| continue; |
| } |
| /* we are in a format specifier */ |
| ++map; |
| /* %% -> % */ |
| if (*map == '%') { |
| ++map; |
| vhost_alias_checkspace(r, buf, &dest, 1); |
| *dest++ = '%'; |
| continue; |
| } |
| /* port number */ |
| if (*map == 'p') { |
| ++map; |
| /* no. of decimal digits in a short plus one */ |
| vhost_alias_checkspace(r, buf, &dest, 7); |
| dest += apr_snprintf(dest, 7, "%d", ap_get_server_port(r)); |
| continue; |
| } |
| /* deal with %-N+.-M+ -- syntax is already checked */ |
| M = 0; /* value */ |
| Np = Mp = 0; /* is there a plus? */ |
| Nd = Md = 0; /* is there a dash? */ |
| if (*map == '-') ++map, Nd = 1; |
| N = *map++ - '0'; |
| if (*map == '+') ++map, Np = 1; |
| if (*map == '.') { |
| ++map; |
| if (*map == '-') { |
| ++map, Md = 1; |
| } |
| M = *map++ - '0'; |
| if (*map == '+') { |
| ++map, Mp = 1; |
| } |
| } |
| /* note that N and M are one-based indices, not zero-based */ |
| start = dots[0]+1; /* ptr to the first character */ |
| end = dots[ndots]; /* ptr to the character after the last one */ |
| if (N != 0) { |
| if (N > ndots) { |
| start = "_"; |
| end = start+1; |
| } |
| else if (!Nd) { |
| start = dots[N-1]+1; |
| if (!Np) { |
| end = dots[N]; |
| } |
| } |
| else { |
| if (!Np) { |
| start = dots[ndots-N]+1; |
| } |
| end = dots[ndots-N+1]; |
| } |
| } |
| if (M != 0) { |
| if (M > end - start) { |
| start = "_"; |
| end = start+1; |
| } |
| else if (!Md) { |
| start = start+M-1; |
| if (!Mp) { |
| end = start+1; |
| } |
| } |
| else { |
| if (!Mp) { |
| start = end-M; |
| } |
| end = end-M+1; |
| } |
| } |
| vhost_alias_checkspace(r, buf, &dest, end - start); |
| for (p = start; p < end; ++p) { |
| *dest++ = apr_tolower(*p); |
| } |
| } |
| /* no double slashes */ |
| if (dest - buf > 0 && dest[-1] == '/') { |
| --dest; |
| } |
| *dest = '\0'; |
| |
| if (r->filename) |
| docroot = apr_pstrcat(r->pool, r->filename, buf, NULL); |
| else |
| docroot = apr_pstrdup(r->pool, buf); |
| r->filename = apr_pstrcat(r->pool, docroot, uri, NULL); |
| ap_set_context_info(r, NULL, docroot); |
| ap_set_document_root(r, docroot); |
| } |
| |
| static int mva_translate(request_rec *r) |
| { |
| mva_sconf_t *conf; |
| const char *name, *map, *uri; |
| mva_mode_e mode; |
| const char *cgi; |
| |
| conf = (mva_sconf_t *) ap_get_module_config(r->server->module_config, |
| &vhost_alias_module); |
| cgi = NULL; |
| if (conf->cgi_root) { |
| cgi = strstr(r->uri, "cgi-bin/"); |
| if (cgi && (cgi != r->uri + strspn(r->uri, "/"))) { |
| cgi = NULL; |
| } |
| } |
| if (cgi) { |
| mode = conf->cgi_root_mode; |
| map = conf->cgi_root; |
| uri = cgi + strlen("cgi-bin"); |
| } |
| else if (r->uri[0] == '/') { |
| mode = conf->doc_root_mode; |
| map = conf->doc_root; |
| uri = r->uri; |
| } |
| else { |
| return DECLINED; |
| } |
| |
| if (mode == VHOST_ALIAS_NAME) { |
| name = ap_get_server_name(r); |
| } |
| else if (mode == VHOST_ALIAS_IP) { |
| name = r->connection->local_ip; |
| } |
| else { |
| return DECLINED; |
| } |
| |
| /* ### There is an optimization available here to determine the |
| * absolute portion of the path from the server config phase, |
| * through the first % segment, and note that portion of the path |
| * canonical_path buffer. |
| */ |
| r->canonical_filename = ""; |
| vhost_alias_interpolate(r, name, map, uri); |
| |
| if (cgi) { |
| /* see is_scriptaliased() in mod_cgi */ |
| r->handler = "cgi-script"; |
| apr_table_setn(r->notes, "alias-forced-type", r->handler); |
| ap_set_context_info(r, "/cgi-bin", NULL); |
| } |
| |
| return OK; |
| } |
| |
| static void register_hooks(apr_pool_t *p) |
| { |
| static const char * const aszPre[]={ "mod_alias.c","mod_userdir.c",NULL }; |
| |
| ap_hook_translate_name(mva_translate, aszPre, NULL, APR_HOOK_MIDDLE); |
| } |
| |
| AP_DECLARE_MODULE(vhost_alias) = |
| { |
| STANDARD20_MODULE_STUFF, |
| NULL, /* dir config creater */ |
| NULL, /* dir merger --- default is to override */ |
| mva_create_server_config, /* server config */ |
| mva_merge_server_config, /* merge server configs */ |
| mva_commands, /* command apr_table_t */ |
| register_hooks /* register hooks */ |
| }; |
| |
