Adding upstream version 2.4.38.upstream/2.4.38upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 457 insertions, 0 deletions

diff --git a/modules/mappers/mod_vhost_alias.c b/modules/mappers/mod_vhost_alias.c
new file mode 100644
index 0000000..0b61694
--- /dev/null
+++ b/modules/mappers/mod_vhost_alias.c
@@ -0,0 +1,457 @@
+/* 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 (strcasecmp(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 */
+};
+