Tag 1.3.421.3

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/tags/1.3@897175 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 475 insertions, 0 deletions

diff --git a/APACHE_1_3_42/src/modules/standard/mod_rewrite.h b/APACHE_1_3_42/src/modules/standard/mod_rewrite.h
new file mode 100644
index 0000000000..5a853abec1
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+++ b/APACHE_1_3_42/src/modules/standard/mod_rewrite.h
@@ -0,0 +1,475 @@
+/* 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.
+ */
+
+
+#ifndef _MOD_REWRITE_H
+#define _MOD_REWRITE_H 1
+
+/*
+**                       _                            _ _
+**   _ __ ___   ___   __| |    _ __ _____      ___ __(_) |_ ___
+**  | '_ ` _ \ / _ \ / _` |   | '__/ _ \ \ /\ / / '__| | __/ _ \
+**  | | | | | | (_) | (_| |   | | |  __/\ V  V /| |  | | ||  __/
+**  |_| |_| |_|\___/ \__,_|___|_|  \___| \_/\_/ |_|  |_|\__\___|
+**                       |_____|
+**
+**  URL Rewriting Module
+**
+**  This module uses a rule-based rewriting engine (based on a
+**  regular-expression parser) to rewrite requested URLs on the fly.
+**
+**  It supports an unlimited number of additional rule conditions (which can
+**  operate on a lot of variables, even on HTTP headers) for granular
+**  matching and even external database lookups (either via plain text
+**  tables, DBM hash files or even external processes) for advanced URL
+**  substitution.
+**
+**  It operates on the full URLs (including the PATH_INFO part) both in
+**  per-server context (httpd.conf) and per-dir context (.htaccess) and even
+**  can generate QUERY_STRING parts on result.   The rewriting result finally
+**  can lead to internal subprocessing, external request redirection or even
+**  to internal proxy throughput.
+**
+**  This module was originally written in April 1996 and
+**  gifted exclusively to the The Apache Group in July 1997 by
+**
+**      Ralf S. Engelschall
+**      rse@engelschall.com
+**      www.engelschall.com
+*/
+
+
+    /* Include from the underlaying Unix system ... */
+#include <string.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <time.h>
+#include <signal.h>
+#include <errno.h>
+#include <ctype.h>
+#ifndef NETWARE
+#include <sys/types.h>
+#endif
+#include <sys/stat.h>
+
+    /* Include from the Apache server ... */
+#define CORE_PRIVATE
+#include "httpd.h"
+#include "http_config.h"
+#include "http_conf_globals.h"
+#include "http_request.h"
+#include "http_core.h"
+#include "http_log.h"
+#include "http_vhost.h"
+
+    /*
+     * The key in the r->notes table wherein we store our accumulated
+     * Vary values, and the one used for per-condition checks in a chain.
+     */
+#define VARY_KEY "rewrite-Vary"
+#define VARY_KEY_THIS "rewrite-Vary-this"
+
+    /* The NDBM support:
+     * We support only NDBM files.
+     * But we have to stat the file for the mtime,
+     * so we also need to know the file extension
+     */
+#ifndef NO_DBM_REWRITEMAP
+#include <ndbm.h>
+#if defined(DBM_SUFFIX)
+#define NDBM_FILE_SUFFIX DBM_SUFFIX
+#elif defined(__FreeBSD__) || (defined(DB_LOCK) && defined(DB_SHMEM))
+#define NDBM_FILE_SUFFIX ".db"
+#else
+#define NDBM_FILE_SUFFIX ".pag"
+#endif
+#endif
+
+
+    /* The locking support:
+     * Try to determine whether we should use fcntl() or flock().
+     * Would be better ap_config.h could provide this... :-(
+     * Small monkey business to ensure that fcntl is preferred,
+     * unless we specified USE_FLOCK_SERIALIZED_ACCEPT during compile.
+     */
+#if defined(HAVE_FCNTL_SERIALIZED_ACCEPT) && !defined(USE_FLOCK_SERIALIZED_ACCEPT)
+#define USE_FCNTL 1
+#include <fcntl.h>
+#elif defined(HAVE_FLOCK_SERIALIZED_ACCEPT)
+#define USE_FLOCK 1
+#include <sys/file.h>
+#endif
+#if !defined(USE_FCNTL) && !defined(USE_FLOCK)
+#define USE_FLOCK 1
+#if !defined(MPE) && !defined(WIN32) && !defined(__TANDEM) && !defined(NETWARE)
+#include <sys/file.h>
+#endif
+#ifndef LOCK_UN
+#undef USE_FLOCK
+#define USE_FCNTL 1
+#include <fcntl.h>
+#endif
+#endif
+#if defined(AIX) || defined(AIXIA64)
+#undef USE_FLOCK
+#define USE_FCNTL 1
+#include <fcntl.h>
+#endif
+#ifdef WIN32
+#undef USE_FCNTL
+#define USE_LOCKING
+#include <sys/locking.h>
+#endif
+
+
+/*
+**
+**  Some defines
+**
+*/
+
+#define ENVVAR_SCRIPT_URL "SCRIPT_URL"
+#define ENVVAR_SCRIPT_URI "SCRIPT_URI"
+
+#ifndef SUPPORT_DBM_REWRITEMAP
+#define SUPPORT_DBM_REWRITEMAP 0
+#endif
+
+#define REWRITE_FORCED_MIMETYPE_NOTEVAR "rewrite-forced-mimetype"
+
+#define CONDFLAG_NONE               1<<0
+#define CONDFLAG_NOCASE             1<<1
+#define CONDFLAG_NOTMATCH           1<<2
+#define CONDFLAG_ORNEXT             1<<3
+
+#define RULEFLAG_NONE               1<<0
+#define RULEFLAG_FORCEREDIRECT      1<<1
+#define RULEFLAG_LASTRULE           1<<2
+#define RULEFLAG_NEWROUND           1<<3
+#define RULEFLAG_CHAIN              1<<4
+#define RULEFLAG_IGNOREONSUBREQ     1<<5
+#define RULEFLAG_NOTMATCH           1<<6
+#define RULEFLAG_PROXY              1<<7
+#define RULEFLAG_PASSTHROUGH        1<<8
+#define RULEFLAG_FORBIDDEN          1<<9
+#define RULEFLAG_GONE               1<<10
+#define RULEFLAG_QSAPPEND           1<<11
+#define RULEFLAG_NOCASE             1<<12
+#define RULEFLAG_NOESCAPE           1<<13
+
+#define ACTION_NORMAL               1<<0
+#define ACTION_NOESCAPE             1<<1
+
+#define MAPTYPE_TXT                 1<<0
+#define MAPTYPE_DBM                 1<<1
+#define MAPTYPE_PRG                 1<<2
+#define MAPTYPE_INT                 1<<3
+#define MAPTYPE_RND                 1<<4
+
+#define ENGINE_DISABLED             1<<0
+#define ENGINE_ENABLED              1<<1
+
+#define OPTION_NONE                 1<<0
+#define OPTION_INHERIT              1<<1
+
+#define CACHEMODE_TS                1<<0
+#define CACHEMODE_TTL               1<<1
+
+#define CACHE_TLB_ROWS 1024
+#define CACHE_TLB_COLS 4
+
+#ifndef FALSE
+#define FALSE 0
+#define TRUE  !FALSE
+#endif
+
+#ifndef NO
+#define NO    FALSE
+#define YES   TRUE
+#endif
+
+#ifndef RAND_MAX
+#define RAND_MAX 32767
+#endif
+
+#ifndef LONG_STRING_LEN
+#define LONG_STRING_LEN 2048
+#endif
+
+#define MAX_ENV_FLAGS 15
+
+/* default maximum number of internal redirects */
+#define REWRITE_REDIRECT_LIMIT 10
+
+/*
+**
+**  our private data structures we handle with
+**
+*/
+
+    /* the list structures for holding the mapfile information
+     * and the rewrite rules
+     */
+typedef struct {
+    char *name;                    /* the name of the map */
+    char *datafile;                /* filename for map data files */
+    char *checkfile;               /* filename to check for map existence */
+    int   type;                    /* the type of the map */
+    int   fpin;                    /* in  file pointer for program maps */
+    int   fpout;                   /* out file pointer for program maps */
+    int   fperr;                   /* err file pointer for program maps */
+    char *(*func)(request_rec *,   /* function pointer for internal maps */
+                  char *);
+    char *cachename;               /* name for the cache */
+} rewritemap_entry;
+
+typedef struct {
+    char    *input;                /* Input string of RewriteCond */
+    char    *pattern;              /* the RegExp pattern string */
+    regex_t *regexp;
+    int      flags;                /* Flags which control the match */
+} rewritecond_entry;
+
+typedef struct {
+    array_header *rewriteconds;    /* the corresponding RewriteCond entries */
+    char    *pattern;              /* the RegExp pattern string */
+    regex_t *regexp;               /* the RegExp pattern compilation */
+    char    *output;               /* the Substitution string */
+    int      flags;                /* Flags which control the substitution */
+    char    *forced_mimetype;      /* forced MIME type of substitution */
+    int      forced_responsecode;  /* forced HTTP redirect response status */
+    char    *env[MAX_ENV_FLAGS+1]; /* added environment variables */
+    int      skip;                 /* number of next rules to skip */
+} rewriterule_entry;
+
+
+    /* the per-server or per-virtual-server configuration
+     * statically generated once on startup for every server
+     */
+typedef struct {
+    int           state;           /* the RewriteEngine state */
+    int           options;         /* the RewriteOption state */
+    char         *rewritelogfile;  /* the RewriteLog filename */
+    int           rewritelogfp;    /* the RewriteLog open filepointer */
+    int           rewriteloglevel; /* the RewriteLog level of verbosity */
+    array_header *rewritemaps;     /* the RewriteMap entries */
+    array_header *rewriteconds;    /* the RewriteCond entries (temporary) */
+    array_header *rewriterules;    /* the RewriteRule entries */
+    server_rec   *server;          /* the corresponding server indicator */
+    int          redirect_limit;   /* maximum number of internal redirects */
+} rewrite_server_conf;
+
+
+    /* the per-directory configuration
+     * generated on-the-fly by Apache server for current request
+     */
+typedef struct {
+    int           state;           /* the RewriteEngine state */
+    int           options;         /* the RewriteOption state */
+    array_header *rewriteconds;    /* the RewriteCond entries (temporary) */
+    array_header *rewriterules;    /* the RewriteRule entries */
+    char         *directory;       /* the directory where it applies */
+    char         *baseurl;         /* the base-URL  where it applies */
+    int          redirect_limit;   /* maximum number of internal redirects */
+} rewrite_perdir_conf;
+
+    /* the per-request configuration
+     */
+typedef struct {
+    int           redirects;       /* current number of redirects */
+    int           redirect_limit;  /* maximum number of redirects */
+} rewrite_request_conf;
+
+
+    /* the cache structures,
+     * a 4-way hash table with LRU functionality
+     */
+typedef struct cacheentry {
+    time_t time;
+    char  *key;
+    char  *value;
+} cacheentry;
+
+typedef struct tlbentry {
+    int t[CACHE_TLB_COLS];
+} cachetlbentry;
+
+typedef struct cachelist {
+    char         *resource;
+    array_header *entries;
+    array_header *tlb;
+} cachelist;
+
+typedef struct cache {
+    pool         *pool;
+    array_header *lists;
+} cache;
+
+
+    /* the regex structure for the
+     * substitution of backreferences
+     */
+typedef struct backrefinfo {
+    char *source;
+    int nsub;
+    regmatch_t regmatch[AP_MAX_REG_MATCH];
+} backrefinfo;
+
+
+/*
+**
+**  forward declarations
+**
+*/
+
+    /* config structure handling */
+static void *config_server_create(pool *p, server_rec *s);
+static void *config_server_merge (pool *p, void *basev, void *overridesv);
+static void *config_perdir_create(pool *p, char *path);
+static void *config_perdir_merge (pool *p, void *basev, void *overridesv);
+
+    /* config directive handling */
+static const char *cmd_rewriteengine(cmd_parms *cmd,
+                                     rewrite_perdir_conf *dconf, int flag);
+static const char *cmd_rewriteoptions(cmd_parms *cmd,
+                                      void *in_dconf,
+                                      const char *option);
+static const char *cmd_rewritelog     (cmd_parms *cmd, void *dconf, char *a1);
+static const char *cmd_rewriteloglevel(cmd_parms *cmd, void *dconf, char *a1);
+static const char *cmd_rewritemap     (cmd_parms *cmd, void *dconf, char *a1,
+                                       char *a2);
+static const char *cmd_rewritelock(cmd_parms *cmd, void *dconf, char *a1);
+static const char *cmd_rewritebase(cmd_parms *cmd, rewrite_perdir_conf *dconf,
+                                   char *a1);
+static const char *cmd_rewritecond(cmd_parms *cmd, rewrite_perdir_conf *dconf,
+                                   char *str);
+static const char *cmd_rewritecond_parseflagfield(pool *p,
+                                                  rewritecond_entry *new,
+                                                  char *str);
+static const char *cmd_rewritecond_setflag(pool *p, rewritecond_entry *cfg,
+                                           char *key, char *val);
+static const char *cmd_rewriterule(cmd_parms *cmd, rewrite_perdir_conf *dconf,
+                                   char *str);
+static const char *cmd_rewriterule_parseflagfield(pool *p,
+                                                  rewriterule_entry *new,
+                                                  char *str);
+static const char *cmd_rewriterule_setflag(pool *p, rewriterule_entry *cfg,
+                                           char *key, char *val);
+
+    /* initialisation */
+static void init_module(server_rec *s, pool *p);
+static void init_child(server_rec *s, pool *p);
+
+    /* runtime hooks */
+static int hook_uri2file   (request_rec *r);
+static int hook_mimetype   (request_rec *r);
+static int hook_fixup      (request_rec *r);
+static int handler_redirect(request_rec *r);
+
+    /* rewriting engine */
+static int apply_rewrite_list(request_rec *r, array_header *rewriterules,
+                              char *perdir);
+static int apply_rewrite_rule(request_rec *r, rewriterule_entry *p,
+                              char *perdir);
+static int apply_rewrite_cond(request_rec *r, rewritecond_entry *p,
+                              char *perdir, backrefinfo *briRR,
+                              backrefinfo *briRC);
+
+static void do_expand(request_rec *r, char *input, char *buffer, int nbuf,
+		       backrefinfo *briRR, backrefinfo *briRC);
+static void do_expand_env(request_rec *r, char *env[],
+			  backrefinfo *briRR, backrefinfo *briRC);
+
+    /* URI transformation function */
+static void  splitout_queryargs(request_rec *r, int qsappend);
+static void  fully_qualify_uri(request_rec *r);
+static void  reduce_uri(request_rec *r);
+static unsigned is_absolute_uri(char *uri);
+static char *escape_absolute_uri(ap_pool *p, char *uri, unsigned scheme);
+static char *expand_tildepaths(request_rec *r, char *uri);
+
+    /* rewrite map support functions */
+static char *lookup_map(request_rec *r, char *name, char *key);
+static char *lookup_map_txtfile(request_rec *r, char *file, char *key);
+#ifndef NO_DBM_REWRITEMAP
+static char *lookup_map_dbmfile(request_rec *r, char *file, char *key);
+#endif
+static char *lookup_map_program(request_rec *r, int fpin,
+                                int fpout, char *key);
+static char *lookup_map_internal(request_rec *r,
+                                 char *(*func)(request_rec *r, char *key),
+                                 char *key);
+static char *rewrite_mapfunc_toupper(request_rec *r, char *key);
+static char *rewrite_mapfunc_tolower(request_rec *r, char *key);
+static char *rewrite_mapfunc_escape(request_rec *r, char *key);
+static char *rewrite_mapfunc_unescape(request_rec *r, char *key);
+static char *select_random_value_part(request_rec *r, char *value);
+static void  rewrite_rand_init(void);
+static int   rewrite_rand(int l, int h);
+
+    /* rewriting logfile support */
+static void  open_rewritelog(server_rec *s, pool *p);
+static void  rewritelog(request_rec *r, int level, const char *text, ...)
+                        __attribute__((format(printf,3,4)));
+static char *current_logtime(request_rec *r);
+
+    /* rewriting lockfile support */
+static void rewritelock_create(server_rec *s, pool *p);
+static void rewritelock_open(server_rec *s, pool *p);
+static void rewritelock_remove(void *data);
+static void rewritelock_alloc(request_rec *r);
+static void rewritelock_free(request_rec *r);
+
+    /* program map support */
+static void  run_rewritemap_programs(server_rec *s, pool *p);
+static int   rewritemap_program_child(void *cmd, child_info *pinfo);
+
+    /* env variable support */
+static char *lookup_variable(request_rec *r, char *var);
+static char *lookup_header(request_rec *r, const char *name);
+
+    /* caching functions */
+static cache *init_cache(pool *p);
+static char  *get_cache_string(cache *c, char *res, int mode, time_t mtime,
+                               char *key);
+static void   set_cache_string(cache *c, char *res, int mode, time_t mtime,
+                               char *key, char *value);
+static cacheentry *retrieve_cache_string(cache *c, char *res, char *key);
+static void   store_cache_string(cache *c, char *res, cacheentry *ce);
+
+    /* misc functions */
+static char  *subst_prefix_path(request_rec *r, char *input, char *match,
+                                const char *subst);
+static int    parseargline(char *str, char **a1, char **a2, char **a3);
+static int    prefix_stat(const char *path, ap_pool *pool);
+static void   add_env_variable(request_rec *r, char *s);
+static int    subreq_ok(request_rec *r);
+static int    is_redirect_limit_exceeded(request_rec *r);
+
+    /* File locking */
+static void fd_lock(request_rec *r, int fd);
+static void fd_unlock(request_rec *r, int fd);
+
+    /* Lexicographic Comparison */
+static int compare_lexicography(char *cpNum1, char *cpNum2);
+
+    /* Bracketed expression handling */
+static char *find_closing_bracket(char *s, int left, int right);
+static char *find_char_in_brackets(char *s, int c, int left, int right);
+
+#endif /* _MOD_REWRITE_H */
+
+/*EOF*/