diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/modules/mappers/mod_alias.c')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/modules/mappers/mod_alias.c | 484 |
1 files changed, 484 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/modules/mappers/mod_alias.c b/rubbos/app/httpd-2.0.64/modules/mappers/mod_alias.c new file mode 100644 index 00000000..4e5b6ef0 --- /dev/null +++ b/rubbos/app/httpd-2.0.64/modules/mappers/mod_alias.c @@ -0,0 +1,484 @@ +/* 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. + */ + +/* + * http_alias.c: Stuff for dealing with directory aliases + * + * Original by Rob McCool, rewritten in succession by David Robinson + * and rst. + * + */ + +#include "apr_strings.h" +#include "apr_lib.h" + +#define APR_WANT_STRFUNC +#include "apr_want.h" + +#include "ap_config.h" +#include "httpd.h" +#include "http_core.h" +#include "http_config.h" +#include "http_request.h" +#include "http_log.h" + + +typedef struct { + const char *real; + const char *fake; + char *handler; + regex_t *regexp; + int redir_status; /* 301, 302, 303, 410, etc */ +} alias_entry; + +typedef struct { + apr_array_header_t *aliases; + apr_array_header_t *redirects; +} alias_server_conf; + +typedef struct { + apr_array_header_t *redirects; +} alias_dir_conf; + +module AP_MODULE_DECLARE_DATA alias_module; + +static void *create_alias_config(apr_pool_t *p, server_rec *s) +{ + alias_server_conf *a = + (alias_server_conf *) apr_pcalloc(p, sizeof(alias_server_conf)); + + a->aliases = apr_array_make(p, 20, sizeof(alias_entry)); + a->redirects = apr_array_make(p, 20, sizeof(alias_entry)); + return a; +} + +static void *create_alias_dir_config(apr_pool_t *p, char *d) +{ + alias_dir_conf *a = + (alias_dir_conf *) apr_pcalloc(p, sizeof(alias_dir_conf)); + a->redirects = apr_array_make(p, 2, sizeof(alias_entry)); + return a; +} + +static void *merge_alias_config(apr_pool_t *p, void *basev, void *overridesv) +{ + alias_server_conf *a = + (alias_server_conf *) apr_pcalloc(p, sizeof(alias_server_conf)); + alias_server_conf *base = (alias_server_conf *) basev; + alias_server_conf *overrides = (alias_server_conf *) overridesv; + + a->aliases = apr_array_append(p, overrides->aliases, base->aliases); + a->redirects = apr_array_append(p, overrides->redirects, base->redirects); + return a; +} + +static void *merge_alias_dir_config(apr_pool_t *p, void *basev, void *overridesv) +{ + alias_dir_conf *a = + (alias_dir_conf *) apr_pcalloc(p, sizeof(alias_dir_conf)); + alias_dir_conf *base = (alias_dir_conf *) basev; + alias_dir_conf *overrides = (alias_dir_conf *) overridesv; + a->redirects = apr_array_append(p, overrides->redirects, base->redirects); + return a; +} + +/* need prototype for overlap check */ +static int alias_matches(const char *uri, const char *alias_fakename); + +static const char *add_alias_internal(cmd_parms *cmd, void *dummy, + const char *f, const char *r, + int use_regex) +{ + server_rec *s = cmd->server; + alias_server_conf *conf = ap_get_module_config(s->module_config, + &alias_module); + alias_entry *new = apr_array_push(conf->aliases); + alias_entry *entries = (alias_entry *)conf->aliases->elts; + int i; + + /* XX r can NOT be relative to DocumentRoot here... compat bug. */ + + if (use_regex) { + new->regexp = ap_pregcomp(cmd->pool, f, REG_EXTENDED); + if (new->regexp == NULL) + return "Regular expression could not be compiled."; + new->real = r; + } + else { + /* XXX This may be optimized, but we must know that new->real + * exists. If so, we can dir merge later, trusing new->real + * and just canonicalizing the remainder. Not till I finish + * cleaning out the old ap_canonical stuff first. + */ + new->real = r; + } + new->fake = f; + new->handler = cmd->info; + + /* check for overlapping (Script)Alias directives + * and throw a warning if found one + */ + if (!use_regex) { + for (i = 0; i < conf->aliases->nelts - 1; ++i) { + alias_entry *p = &entries[i]; + + if ( (!p->regexp && alias_matches(f, p->fake) > 0) + || (p->regexp && !ap_regexec(p->regexp, f, 0, NULL, 0))) { + ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, + "The %s directive in %s at line %d will probably " + "never match because it overlaps an earlier " + "%sAlias%s.", + cmd->cmd->name, cmd->directive->filename, + cmd->directive->line_num, + p->handler ? "Script" : "", + p->regexp ? "Match" : ""); + + break; /* one warning per alias should be sufficient */ + } + } + } + + return NULL; +} + +static const char *add_alias(cmd_parms *cmd, void *dummy, const char *f, + const char *r) +{ + return add_alias_internal(cmd, dummy, f, r, 0); +} + +static const char *add_alias_regex(cmd_parms *cmd, void *dummy, const char *f, + const char *r) +{ + return add_alias_internal(cmd, dummy, f, r, 1); +} + +static const char *add_redirect_internal(cmd_parms *cmd, + alias_dir_conf *dirconf, + const char *arg1, const char *arg2, + const char *arg3, int use_regex) +{ + alias_entry *new; + server_rec *s = cmd->server; + alias_server_conf *serverconf = ap_get_module_config(s->module_config, + &alias_module); + int status = (int) (long) cmd->info; + regex_t *r = NULL; + const char *f = arg2; + const char *url = arg3; + + if (!strcasecmp(arg1, "gone")) + status = HTTP_GONE; + else if (!strcasecmp(arg1, "permanent")) + status = HTTP_MOVED_PERMANENTLY; + else if (!strcasecmp(arg1, "temp")) + status = HTTP_MOVED_TEMPORARILY; + else if (!strcasecmp(arg1, "seeother")) + status = HTTP_SEE_OTHER; + else if (apr_isdigit(*arg1)) + status = atoi(arg1); + else { + f = arg1; + url = arg2; + } + + if (use_regex) { + r = ap_pregcomp(cmd->pool, f, REG_EXTENDED); + if (r == NULL) + return "Regular expression could not be compiled."; + } + + if (ap_is_HTTP_REDIRECT(status)) { + if (!url) + return "URL to redirect to is missing"; + if (!use_regex && !ap_is_url(url)) + return "Redirect to non-URL"; + } + else { + if (url) + return "Redirect URL not valid for this status"; + } + + if (cmd->path) + new = apr_array_push(dirconf->redirects); + else + new = apr_array_push(serverconf->redirects); + + new->fake = f; + new->real = url; + new->regexp = r; + new->redir_status = status; + return NULL; +} + +static const char *add_redirect(cmd_parms *cmd, void *dirconf, + const char *arg1, const char *arg2, + const char *arg3) +{ + return add_redirect_internal(cmd, dirconf, arg1, arg2, arg3, 0); +} + +static const char *add_redirect2(cmd_parms *cmd, void *dirconf, + const char *arg1, const char *arg2) +{ + return add_redirect_internal(cmd, dirconf, arg1, arg2, NULL, 0); +} + +static const char *add_redirect_regex(cmd_parms *cmd, void *dirconf, + const char *arg1, const char *arg2, + const char *arg3) +{ + return add_redirect_internal(cmd, dirconf, arg1, arg2, arg3, 1); +} + +static const command_rec alias_cmds[] = +{ + AP_INIT_TAKE2("Alias", add_alias, NULL, RSRC_CONF, + "a fakename and a realname"), + AP_INIT_TAKE2("ScriptAlias", add_alias, "cgi-script", RSRC_CONF, + "a fakename and a realname"), + AP_INIT_TAKE23("Redirect", add_redirect, (void *) HTTP_MOVED_TEMPORARILY, + OR_FILEINFO, + "an optional status, then document to be redirected and " + "destination URL"), + AP_INIT_TAKE2("AliasMatch", add_alias_regex, NULL, RSRC_CONF, + "a regular expression and a filename"), + AP_INIT_TAKE2("ScriptAliasMatch", add_alias_regex, "cgi-script", RSRC_CONF, + "a regular expression and a filename"), + AP_INIT_TAKE23("RedirectMatch", add_redirect_regex, + (void *) HTTP_MOVED_TEMPORARILY, OR_FILEINFO, + "an optional status, then a regular expression and " + "destination URL"), + AP_INIT_TAKE2("RedirectTemp", add_redirect2, + (void *) HTTP_MOVED_TEMPORARILY, OR_FILEINFO, + "a document to be redirected, then the destination URL"), + AP_INIT_TAKE2("RedirectPermanent", add_redirect2, + (void *) HTTP_MOVED_PERMANENTLY, OR_FILEINFO, + "a document to be redirected, then the destination URL"), + {NULL} +}; + +static int alias_matches(const char *uri, const char *alias_fakename) +{ + const char *aliasp = alias_fakename, *urip = uri; + + while (*aliasp) { + if (*aliasp == '/') { + /* any number of '/' in the alias matches any number in + * the supplied URI, but there must be at least one... + */ + if (*urip != '/') + return 0; + + do { + ++aliasp; + } while (*aliasp == '/'); + do { + ++urip; + } while (*urip == '/'); + } + else { + /* Other characters are compared literally */ + if (*urip++ != *aliasp++) + return 0; + } + } + + /* Check last alias path component matched all the way */ + + if (aliasp[-1] != '/' && *urip != '\0' && *urip != '/') + return 0; + + /* Return number of characters from URI which matched (may be + * greater than length of alias, since we may have matched + * doubled slashes) + */ + + return urip - uri; +} + +static char *try_alias_list(request_rec *r, apr_array_header_t *aliases, + int doesc, int *status) +{ + alias_entry *entries = (alias_entry *) aliases->elts; + regmatch_t regm[AP_MAX_REG_MATCH]; + char *found = NULL; + int i; + + for (i = 0; i < aliases->nelts; ++i) { + alias_entry *p = &entries[i]; + int l; + + if (p->regexp) { + if (!ap_regexec(p->regexp, r->uri, AP_MAX_REG_MATCH, regm, 0)) { + if (p->real) { + found = ap_pregsub(r->pool, p->real, r->uri, + AP_MAX_REG_MATCH, regm); + if (found && doesc) { + apr_uri_t uri; + apr_uri_parse(r->pool, found, &uri); + /* Do not escape the query string or fragment. */ + found = apr_uri_unparse(r->pool, &uri, + APR_URI_UNP_OMITQUERY); + found = ap_escape_uri(r->pool, found); + if (uri.query) { + found = apr_pstrcat(r->pool, found, "?", + uri.query, NULL); + } + if (uri.fragment) { + found = apr_pstrcat(r->pool, found, "#", + uri.fragment, NULL); + } + } + } + else { + /* need something non-null */ + found = apr_pstrdup(r->pool, ""); + } + } + } + else { + l = alias_matches(r->uri, p->fake); + + if (l > 0) { + if (doesc) { + char *escurl; + escurl = ap_os_escape_path(r->pool, r->uri + l, 1); + + found = apr_pstrcat(r->pool, p->real, escurl, NULL); + } + else + found = apr_pstrcat(r->pool, p->real, r->uri + l, NULL); + } + } + + if (found) { + if (p->handler) { /* Set handler, and leave a note for mod_cgi */ + r->handler = p->handler; + apr_table_setn(r->notes, "alias-forced-type", r->handler); + } + /* XXX This is as SLOW as can be, next step, we optimize + * and merge to whatever part of the found path was already + * canonicalized. After I finish eliminating os canonical. + * Better fail test for ap_server_root_relative needed here. + */ + if (!doesc) { + found = ap_server_root_relative(r->pool, found); + } + if (found) { + *status = p->redir_status; + } + return found; + } + + } + + return NULL; +} + +static int translate_alias_redir(request_rec *r) +{ + ap_conf_vector_t *sconf = r->server->module_config; + alias_server_conf *serverconf = ap_get_module_config(sconf, &alias_module); + char *ret; + int status; + + if (r->uri[0] != '/' && r->uri[0] != '\0') { + return DECLINED; + } + + if ((ret = try_alias_list(r, serverconf->redirects, 1, &status)) != NULL) { + if (ap_is_HTTP_REDIRECT(status)) { + /* include QUERY_STRING if any */ + if (r->args) { + ret = apr_pstrcat(r->pool, ret, "?", r->args, NULL); + } + apr_table_setn(r->headers_out, "Location", ret); + } + return status; + } + + if ((ret = try_alias_list(r, serverconf->aliases, 0, &status)) != NULL) { + r->filename = ret; + return OK; + } + + return DECLINED; +} + +static int fixup_redir(request_rec *r) +{ + void *dconf = r->per_dir_config; + alias_dir_conf *dirconf = + (alias_dir_conf *) ap_get_module_config(dconf, &alias_module); + char *ret; + int status; + + /* It may have changed since last time, so try again */ + + if ((ret = try_alias_list(r, dirconf->redirects, 1, &status)) != NULL) { + if (ap_is_HTTP_REDIRECT(status)) { + if (ret[0] == '/') { + char *orig_target = ret; + + ret = ap_construct_url(r->pool, ret, r); + ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, + "incomplete redirection target of '%s' for " + "URI '%s' modified to '%s'", + orig_target, r->uri, ret); + } + if (!ap_is_url(ret)) { + status = HTTP_INTERNAL_SERVER_ERROR; + ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, + "cannot redirect '%s' to '%s'; " + "target is not a valid absoluteURI or abs_path", + r->uri, ret); + } + else { + /* append requested query only, if the config didn't + * supply its own. + */ + if (r->args && !ap_strchr(ret, '?')) { + ret = apr_pstrcat(r->pool, ret, "?", r->args, NULL); + } + apr_table_setn(r->headers_out, "Location", ret); + } + } + return status; + } + + return DECLINED; +} + +static void register_hooks(apr_pool_t *p) +{ + static const char * const aszSucc[]={ "mod_userdir.c", + "mod_vhost_alias.c",NULL }; + + ap_hook_translate_name(translate_alias_redir,NULL,aszSucc,APR_HOOK_MIDDLE); + ap_hook_fixups(fixup_redir,NULL,NULL,APR_HOOK_MIDDLE); +} + +module AP_MODULE_DECLARE_DATA alias_module = +{ + STANDARD20_MODULE_STUFF, + create_alias_dir_config, /* dir config creater */ + merge_alias_dir_config, /* dir merger --- default is to override */ + create_alias_config, /* server config */ + merge_alias_config, /* merge server configs */ + alias_cmds, /* command apr_table_t */ + register_hooks /* register hooks */ +}; |