/* 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.

 */

#include "apr.h"

#include "apr_lib.h"

#include "apr_strings.h"

#define APR_WANT_STRFUNC

#include "apr_want.h"

#if APR_HAVE_STDLIB_H

#include <stdlib.h>

#endif

#include "ap_config.h"

#include "httpd.h"

#include "http_config.h"

#include "http_main.h"

#include "http_log.h"

#include "http_core.h"

#include "http_protocol.h"

#include "http_request.h"       /* for sub_req_lookup_uri() */

#include "util_script.h"

#include "apr_date.h"           /* For apr_date_parse_http() */

#include "util_ebcdic.h"

#ifdef OS2

#define INCL_DOS

#include <os2.h>

#endif

/*

 * Various utility functions which are common to a whole lot of

 * script-type extensions mechanisms, and might as well be gathered

 * in one place (if only to avoid creating inter-module dependancies

 * where there don't have to be).

 */

/* we know core's module_index is 0 */

#undef APLOG_MODULE_INDEX

#define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX

static char *http2env(request_rec *r, const char *w)

{

    char *res = (char *)apr_palloc(r->pool, sizeof("HTTP_") + strlen(w));

    char *cp = res;

    char c;

    *cp++ = 'H';

    *cp++ = 'T';

    *cp++ = 'T';

    *cp++ = 'P';

    *cp++ = '_';

    while ((c = *w++) != 0) {

        if (apr_isalnum(c)) {

            *cp++ = apr_toupper(c);

        }

        else if (c == '-') {

            *cp++ = '_';

        }

        else {

            if (APLOGrtrace1(r))

                ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r,

                            "Not exporting header with invalid name as envvar: %s",

                            ap_escape_logitem(r->pool, w));

            return NULL;

        }

    }

    *cp = 0;

    return res;

}

static void add_unless_null(apr_table_t *table, const char *name, const char *val)

{

    if (name && val) {

        apr_table_addn(table, name, val);

    }

}

static void env2env(apr_table_t *table, const char *name)

{

    add_unless_null(table, name, getenv(name));

}

AP_DECLARE(char **) ap_create_environment(apr_pool_t *p, apr_table_t *t)

{

    const apr_array_header_t *env_arr = apr_table_elts(t);

    const apr_table_entry_t *elts = (const apr_table_entry_t *) env_arr->elts;

    char **env = (char **) apr_palloc(p, (env_arr->nelts + 2) * sizeof(char *));

    int i, j;

    char *tz;

    char *whack;

    j = 0;

    if (!apr_table_get(t, "TZ")) {

        tz = getenv("TZ");

        if (tz != NULL) {

            env[j++] = apr_pstrcat(p, "TZ=", tz, NULL);

        }

    }

    for (i = 0; i < env_arr->nelts; ++i) {

        if (!elts[i].key) {

            continue;

        }

        env[j] = apr_pstrcat(p, elts[i].key, "=", elts[i].val, NULL);

        whack = env[j];

        if (apr_isdigit(*whack)) {

            *whack++ = '_';

        }

        while (*whack != '=') {

#ifdef WIN32

            if (!apr_isalnum(*whack) && *whack != '(' && *whack != ')') {

#else

            if (!apr_isalnum(*whack)) {

#endif

                *whack = '_';

            }

            ++whack;

        }

        ++j;

    }

    env[j] = NULL;

    return env;

}

AP_DECLARE(void) ap_add_common_vars(request_rec *r)

{

    apr_table_t *e;

    server_rec *s = r->server;

    conn_rec *c = r->connection;

    core_dir_config *conf =

        (core_dir_config *)ap_get_core_module_config(r->per_dir_config);

    const char *env_temp;

    const apr_array_header_t *hdrs_arr = apr_table_elts(r->headers_in);

    const apr_table_entry_t *hdrs = (const apr_table_entry_t *) hdrs_arr->elts;

    int i;

    apr_port_t rport;

    char *q;

    /* use a temporary apr_table_t which we'll overlap onto

     * r->subprocess_env later

     * (exception: if r->subprocess_env is empty at the start,

     * write directly into it)

     */

    if (apr_is_empty_table(r->subprocess_env)) {

        e = r->subprocess_env;

    }

    else {

        e = apr_table_make(r->pool, 25 + hdrs_arr->nelts);

    }

    /* First, add environment vars from headers... this is as per

     * CGI specs, though other sorts of scripting interfaces see

     * the same vars...

     */

    for (i = 0; i < hdrs_arr->nelts; ++i) {

        if (!hdrs[i].key) {

            continue;

        }

        /* A few headers are special cased --- Authorization to prevent

         * rogue scripts from capturing passwords; content-type and -length

         * for no particular reason.

         */

        if (!strcasecmp(hdrs[i].key, "Content-type")) {

            apr_table_addn(e, "CONTENT_TYPE", hdrs[i].val);

        }

        else if (!strcasecmp(hdrs[i].key, "Content-length")) {

            apr_table_addn(e, "CONTENT_LENGTH", hdrs[i].val);

        }

        /* HTTP_PROXY collides with a popular envvar used to configure

         * proxies, don't let clients set/override it.  But, if you must...

         */

#ifndef SECURITY_HOLE_PASS_PROXY

        else if (!ap_cstr_casecmp(hdrs[i].key, "Proxy")) {

            ;

        }

#endif

        /*

         * You really don't want to disable this check, since it leaves you

         * wide open to CGIs stealing passwords and people viewing them

         * in the environment with "ps -e".  But, if you must...

         */

#ifndef SECURITY_HOLE_PASS_AUTHORIZATION

        else if (!strcasecmp(hdrs[i].key, "Authorization")

                 || !strcasecmp(hdrs[i].key, "Proxy-Authorization")) {

            if (conf->cgi_pass_auth == AP_CGI_PASS_AUTH_ON) {

                add_unless_null(e, http2env(r, hdrs[i].key), hdrs[i].val);

            }

        }

#endif

        else

            add_unless_null(e, http2env(r, hdrs[i].key), hdrs[i].val);

    }

    env_temp = apr_table_get(r->subprocess_env, "PATH");

    if (env_temp == NULL) {

        env_temp = getenv("PATH");

    }

    if (env_temp == NULL) {

        env_temp = DEFAULT_PATH;

    }

    apr_table_addn(e, "PATH", apr_pstrdup(r->pool, env_temp));

#if defined(WIN32)

    env2env(e, "SystemRoot");

    env2env(e, "COMSPEC");

    env2env(e, "PATHEXT");

    env2env(e, "WINDIR");

#elif defined(OS2)

    env2env(e, "COMSPEC");

    env2env(e, "ETC");

    env2env(e, "DPATH");

    env2env(e, "PERLLIB_PREFIX");

#elif defined(BEOS)

    env2env(e, "LIBRARY_PATH");

#elif defined(DARWIN)

    env2env(e, "DYLD_LIBRARY_PATH");

#elif defined(_AIX)

    env2env(e, "LIBPATH");

#elif defined(__HPUX__)

    /* HPUX PARISC 2.0W knows both, otherwise redundancy is harmless */

    env2env(e, "SHLIB_PATH");

    env2env(e, "LD_LIBRARY_PATH");

#else /* Some Unix */

    env2env(e, "LD_LIBRARY_PATH");

#endif

    apr_table_addn(e, "SERVER_SIGNATURE", ap_psignature("", r));

    apr_table_addn(e, "SERVER_SOFTWARE", ap_get_server_banner());

    apr_table_addn(e, "SERVER_NAME",

                   ap_escape_html(r->pool, ap_get_server_name_for_url(r)));

    apr_table_addn(e, "SERVER_ADDR", r->connection->local_ip);  /* Apache */

    apr_table_addn(e, "SERVER_PORT",

                  apr_psprintf(r->pool, "%u", ap_get_server_port(r)));

    add_unless_null(e, "REMOTE_HOST",

                    ap_get_useragent_host(r, REMOTE_HOST, NULL));

    apr_table_addn(e, "REMOTE_ADDR", r->useragent_ip);

    apr_table_addn(e, "DOCUMENT_ROOT", ap_document_root(r));    /* Apache */

    apr_table_setn(e, "REQUEST_SCHEME", ap_http_scheme(r));

    apr_table_addn(e, "CONTEXT_PREFIX", ap_context_prefix(r));

    apr_table_addn(e, "CONTEXT_DOCUMENT_ROOT", ap_context_document_root(r));

    apr_table_addn(e, "SERVER_ADMIN", s->server_admin); /* Apache */

    if (apr_table_get(r->notes, "proxy-noquery") && (q = ap_strchr(r->filename, '?'))) {

        char *script_filename = apr_pstrmemdup(r->pool, r->filename, q - r->filename);

        apr_table_addn(e, "SCRIPT_FILENAME", script_filename);

    }

    else {

        apr_table_addn(e, "SCRIPT_FILENAME", r->filename);  /* Apache */

    }

    rport = c->client_addr->port;

    apr_table_addn(e, "REMOTE_PORT", apr_itoa(r->pool, rport));

    if (r->user) {

        apr_table_addn(e, "REMOTE_USER", r->user);

    }

    else if (r->prev) {

        request_rec *back = r->prev;

        while (back) {

            if (back->user) {

                apr_table_addn(e, "REDIRECT_REMOTE_USER", back->user);

                break;

            }

            back = back->prev;

        }

    }

    add_unless_null(e, "AUTH_TYPE", r->ap_auth_type);

    env_temp = ap_get_remote_logname(r);

    if (env_temp) {

        apr_table_addn(e, "REMOTE_IDENT", apr_pstrdup(r->pool, env_temp));

    }

    /* Apache custom error responses. If we have redirected set two new vars */

    if (r->prev) {

        if (conf->qualify_redirect_url != AP_CORE_CONFIG_ON) { 

            add_unless_null(e, "REDIRECT_URL", r->prev->uri);

        }

        else { 

            /* PR#57785: reconstruct full URL here */

            apr_uri_t *uri = &r->prev->parsed_uri;

            if (!uri->scheme) {

                uri->scheme = (char*)ap_http_scheme(r->prev);

            }

            if (!uri->port) {

                uri->port = ap_get_server_port(r->prev);

                uri->port_str = apr_psprintf(r->pool, "%u", uri->port);

            }

            if (!uri->hostname) {

                uri->hostname = (char*)ap_get_server_name_for_url(r->prev);

            }

            add_unless_null(e, "REDIRECT_URL",

                            apr_uri_unparse(r->pool, uri, 0));

        }

        add_unless_null(e, "REDIRECT_QUERY_STRING", r->prev->args);

    }

    if (e != r->subprocess_env) {

        apr_table_overlap(r->subprocess_env, e, APR_OVERLAP_TABLES_SET);

    }

}

/* This "cute" little function comes about because the path info on

 * filenames and URLs aren't always the same. So we take the two,

 * and find as much of the two that match as possible.

 */

AP_DECLARE(int) ap_find_path_info(const char *uri, const char *path_info)

{

    int lu = strlen(uri);

    int lp = strlen(path_info);

    while (lu-- && lp-- && uri[lu] == path_info[lp]) {

        if (path_info[lp] == '/') {

            while (lu && uri[lu-1] == '/') lu--;

        }

    }

    if (lu == -1) {

        lu = 0;

    }

    while (uri[lu] != '\0' && uri[lu] != '/') {

        lu++;

    }

    return lu;

}

/* Obtain the Request-URI from the original request-line, returning

 * a new string from the request pool containing the URI or "".

 */

static char *original_uri(request_rec *r)

{

    char *first, *last;

    if (r->the_request == NULL) {

        return (char *) apr_pcalloc(r->pool, 1);

    }

    first = r->the_request;     /* use the request-line */

    while (*first && !apr_isspace(*first)) {

        ++first;                /* skip over the method */

    }

    while (apr_isspace(*first)) {

        ++first;                /*   and the space(s)   */

    }

    last = first;

    while (*last && !apr_isspace(*last)) {

        ++last;                 /* end at next whitespace */

    }

    return apr_pstrmemdup(r->pool, first, last - first);

}

AP_DECLARE(void) ap_add_cgi_vars(request_rec *r)

{

    apr_table_t *e = r->subprocess_env;

    core_dir_config *conf =

        (core_dir_config *)ap_get_core_module_config(r->per_dir_config);

    int request_uri_from_original = 1;

    const char *request_uri_rule;

    apr_table_setn(e, "GATEWAY_INTERFACE", "CGI/1.1");

    apr_table_setn(e, "SERVER_PROTOCOL", r->protocol);

    apr_table_setn(e, "REQUEST_METHOD", r->method);

    apr_table_setn(e, "QUERY_STRING", r->args ? r->args : "");

    if (conf->cgi_var_rules) {

        request_uri_rule = apr_hash_get(conf->cgi_var_rules, "REQUEST_URI",

                                        APR_HASH_KEY_STRING);

        if (request_uri_rule && !strcmp(request_uri_rule, "current-uri")) {

            request_uri_from_original = 0;

        }

    }

    apr_table_setn(e, "REQUEST_URI",

                   request_uri_from_original ? original_uri(r) : r->uri);

    /* Note that the code below special-cases scripts run from includes,

     * because it "knows" that the sub_request has been hacked to have the

     * args and path_info of the original request, and not any that may have

     * come with the script URI in the include command.  Ugh.

     */

    if (!strcmp(r->protocol, "INCLUDED")) {

        apr_table_setn(e, "SCRIPT_NAME", r->uri);

        if (r->path_info && *r->path_info) {

            apr_table_setn(e, "PATH_INFO", r->path_info);

        }

    }

    else if (!r->path_info || !*r->path_info) {

        apr_table_setn(e, "SCRIPT_NAME", r->uri);

    }

    else {

        int path_info_start = ap_find_path_info(r->uri, r->path_info);

        apr_table_setn(e, "SCRIPT_NAME",

                      apr_pstrndup(r->pool, r->uri, path_info_start));

        apr_table_setn(e, "PATH_INFO", r->path_info);

    }

    if (r->path_info && r->path_info[0]) {

        /*

         * To get PATH_TRANSLATED, treat PATH_INFO as a URI path.

         * Need to re-escape it for this, since the entire URI was

         * un-escaped before we determined where the PATH_INFO began.

         */

        request_rec *pa_req;

        pa_req = ap_sub_req_lookup_uri(ap_escape_uri(r->pool, r->path_info), r,

                                       NULL);

        if (pa_req->filename) {

            char *pt = apr_pstrcat(r->pool, pa_req->filename, pa_req->path_info,

                                  NULL);

#ifdef WIN32

            /* We need to make this a real Windows path name */

            apr_filepath_merge(&pt, "", pt, APR_FILEPATH_NATIVE, r->pool);

#endif

            apr_table_setn(e, "PATH_TRANSLATED", pt);

        }

        ap_destroy_sub_req(pa_req);

    }

}

static int set_cookie_doo_doo(void *v, const char *key, const char *val)

{

    apr_table_addn(v, key, val);

    return 1;

}

#define HTTP_UNSET (-HTTP_OK)

#define SCRIPT_LOG_MARK  __FILE__,__LINE__,module_index

AP_DECLARE(int) ap_scan_script_header_err_core_ex(request_rec *r, char *buffer,

                                       int (*getsfunc) (char *, int, void *),

                                       void *getsfunc_data,

                                       int module_index)

{

    char x[MAX_STRING_LEN];

    char *w, *l;

    int p;

    int cgi_status = HTTP_UNSET;

    apr_table_t *merge;

    apr_table_t *cookie_table;

    int trace_log = APLOG_R_MODULE_IS_LEVEL(r, module_index, APLOG_TRACE1);

    int first_header = 1;

    if (buffer) {

        *buffer = '\0';

    }

    w = buffer ? buffer : x;

    /* temporary place to hold headers to merge in later */

    merge = apr_table_make(r->pool, 10);

    /* The HTTP specification says that it is legal to merge duplicate

     * headers into one.  Some browsers that support Cookies don't like

     * merged headers and prefer that each Set-Cookie header is sent

     * separately.  Lets humour those browsers by not merging.

     * Oh what a pain it is.

     */

    cookie_table = apr_table_make(r->pool, 2);

    apr_table_do(set_cookie_doo_doo, cookie_table, r->err_headers_out, "Set-Cookie", NULL);

    while (1) {

        int rv = (*getsfunc) (w, MAX_STRING_LEN - 1, getsfunc_data);

        if (rv == 0) {

            const char *msg = "Premature end of script headers";

            if (first_header)

                msg = "End of script output before headers";

            /* Intentional no APLOGNO */

            ap_log_rerror(SCRIPT_LOG_MARK, APLOG_ERR|APLOG_TOCLIENT, 0, r,

                          "%s: %s", msg,

                          apr_filepath_name_get(r->filename));

            return HTTP_INTERNAL_SERVER_ERROR;

        }

        else if (rv == -1) {

            /* Intentional no APLOGNO */

            ap_log_rerror(SCRIPT_LOG_MARK, APLOG_ERR|APLOG_TOCLIENT, 0, r,

                          "Script timed out before returning headers: %s",

                          apr_filepath_name_get(r->filename));

            return HTTP_GATEWAY_TIME_OUT;

        }

        /* Delete terminal (CR?)LF */

        p = strlen(w);

             /* Indeed, the host's '\n':

                '\012' for UNIX; '\015' for MacOS; '\025' for OS/390

                 -- whatever the script generates.

             */

        if (p > 0 && w[p - 1] == '\n') {

            if (p > 1 && w[p - 2] == CR) {

                w[p - 2] = '\0';

            }

            else {

                w[p - 1] = '\0';

            }

        }

        /*

         * If we've finished reading the headers, check to make sure any

         * HTTP/1.1 conditions are met.  If so, we're done; normal processing

         * will handle the script's output.  If not, just return the error.

         * The appropriate thing to do would be to send the script process a

         * SIGPIPE to let it know we're ignoring it, close the channel to the

         * script process, and *then* return the failed-to-meet-condition

         * error.  Otherwise we'd be waiting for the script to finish

         * blithering before telling the client the output was no good.

         * However, we don't have the information to do that, so we have to

         * leave it to an upper layer.

         */

        if (w[0] == '\0') {

            int cond_status = OK;

            /* PR#38070: This fails because it gets confused when a

             * CGI Status header overrides ap_meets_conditions.

             *

             * We can fix that by dropping ap_meets_conditions when

             * Status has been set.  Since this is the only place

             * cgi_status gets used, let's test it explicitly.

             *

             * The alternative would be to ignore CGI Status when

             * ap_meets_conditions returns anything interesting.

             * That would be safer wrt HTTP, but would break CGI.

             */

            if ((cgi_status == HTTP_UNSET) && (r->method_number == M_GET)) {

                cond_status = ap_meets_conditions(r);

            }

            apr_table_overlap(r->err_headers_out, merge,

                APR_OVERLAP_TABLES_MERGE);

            if (!apr_is_empty_table(cookie_table)) {

                /* the cookies have already been copied to the cookie_table */

                apr_table_unset(r->err_headers_out, "Set-Cookie");

                r->err_headers_out = apr_table_overlay(r->pool,

                    r->err_headers_out, cookie_table);

            }

            return cond_status;

        }

        if (trace_log) {

            if (first_header)

                ap_log_rerror(SCRIPT_LOG_MARK, APLOG_TRACE4, 0, r,

                              "Headers from script '%s':",

                              apr_filepath_name_get(r->filename));

            ap_log_rerror(SCRIPT_LOG_MARK, APLOG_TRACE4, 0, r, "  %s", w);

        }

        /* if we see a bogus header don't ignore it. Shout and scream */

#if APR_CHARSET_EBCDIC

            /* Chances are that we received an ASCII header text instead of

             * the expected EBCDIC header lines. Try to auto-detect:

             */

        if (!(l = strchr(w, ':'))) {

            int maybeASCII = 0, maybeEBCDIC = 0;

            unsigned char *cp, native;

            apr_size_t inbytes_left, outbytes_left;

            for (cp = w; *cp != '\0'; ++cp) {

                native = apr_xlate_conv_byte(ap_hdrs_from_ascii, *cp);

                if (apr_isprint(*cp) && !apr_isprint(native))

                    ++maybeEBCDIC;

                if (!apr_isprint(*cp) && apr_isprint(native))

                    ++maybeASCII;

            }

            if (maybeASCII > maybeEBCDIC) {

                ap_log_error(SCRIPT_LOG_MARK, APLOG_ERR, 0, r->server,

                             APLOGNO(02660) "CGI Interface Error: "

                             "Script headers apparently ASCII: (CGI = %s)",

                             r->filename);

                inbytes_left = outbytes_left = cp - w;

                apr_xlate_conv_buffer(ap_hdrs_from_ascii,

                                      w, &inbytes_left, w, &outbytes_left);

            }

        }

#endif /*APR_CHARSET_EBCDIC*/

        if (!(l = strchr(w, ':'))) {

            if (!buffer) {

                /* Soak up all the script output - may save an outright kill */

                while ((*getsfunc)(w, MAX_STRING_LEN - 1, getsfunc_data) > 0) {

                    continue;

                }

            }

            /* Intentional no APLOGNO */

            ap_log_rerror(SCRIPT_LOG_MARK, APLOG_ERR|APLOG_TOCLIENT, 0, r,

                          "malformed header from script '%s': Bad header: %.30s",

                          apr_filepath_name_get(r->filename), w);

            return HTTP_INTERNAL_SERVER_ERROR;

        }

        *l++ = '\0';

        while (apr_isspace(*l)) {

            ++l;

        }

        if (!strcasecmp(w, "Content-type")) {

            char *tmp;

            /* Nuke trailing whitespace */

            char *endp = l + strlen(l) - 1;

            while (endp > l && apr_isspace(*endp)) {

                *endp-- = '\0';

            }

            tmp = apr_pstrdup(r->pool, l);

            ap_content_type_tolower(tmp);

            ap_set_content_type(r, tmp);

        }

        /*

         * If the script returned a specific status, that's what

         * we'll use - otherwise we assume 200 OK.

         */

        else if (!strcasecmp(w, "Status")) {

            r->status = cgi_status = atoi(l);

            if (!ap_is_HTTP_VALID_RESPONSE(cgi_status))

                /* Intentional no APLOGNO */

                ap_log_rerror(SCRIPT_LOG_MARK, APLOG_ERR|APLOG_TOCLIENT, 0, r,

                              "Invalid status line from script '%s': %.30s",

                              apr_filepath_name_get(r->filename), l);

            else

                if (APLOGrtrace1(r))

                   ap_log_rerror(SCRIPT_LOG_MARK, APLOG_TRACE1, 0, r,

                                 "Status line from script '%s': %.30s",

                                 apr_filepath_name_get(r->filename), l);

            r->status_line = apr_pstrdup(r->pool, l);

        }

        else if (!strcasecmp(w, "Location")) {

            apr_table_set(r->headers_out, w, l);

        }

        else if (!strcasecmp(w, "Content-Length")) {

            apr_table_set(r->headers_out, w, l);

        }

        else if (!strcasecmp(w, "Content-Range")) {

            apr_table_set(r->headers_out, w, l);

        }

        else if (!strcasecmp(w, "Transfer-Encoding")) {

            apr_table_set(r->headers_out, w, l);

        }

        else if (!strcasecmp(w, "ETag")) {

            apr_table_set(r->headers_out, w, l);

        }

        /*

         * If the script gave us a Last-Modified header, we can't just

         * pass it on blindly because of restrictions on future values.

         */

        else if (!strcasecmp(w, "Last-Modified")) {

            ap_update_mtime(r, apr_date_parse_http(l));

            ap_set_last_modified(r);

        }

        else if (!strcasecmp(w, "Set-Cookie")) {

            apr_table_add(cookie_table, w, l);

        }

        else {

            apr_table_add(merge, w, l);

        }

        first_header = 0;

    }

    /* never reached - we leave this function within the while loop above */

    return OK;

}

AP_DECLARE(int) ap_scan_script_header_err_core(request_rec *r, char *buffer,

                                       int (*getsfunc) (char *, int, void *),

                                       void *getsfunc_data)

{

    return ap_scan_script_header_err_core_ex(r, buffer, getsfunc,

                                             getsfunc_data,

                                             APLOG_MODULE_INDEX);

}

static int getsfunc_FILE(char *buf, int len, void *f)

{

    return apr_file_gets(buf, len, (apr_file_t *) f) == APR_SUCCESS;

}

AP_DECLARE(int) ap_scan_script_header_err(request_rec *r, apr_file_t *f,

                                          char *buffer)

{

    return ap_scan_script_header_err_core_ex(r, buffer, getsfunc_FILE, f,

                                             APLOG_MODULE_INDEX);

}

AP_DECLARE(int) ap_scan_script_header_err_ex(request_rec *r, apr_file_t *f,

                                          char *buffer, int module_index)

{

    return ap_scan_script_header_err_core_ex(r, buffer, getsfunc_FILE, f,

                                             module_index);

}

static int getsfunc_BRIGADE(char *buf, int len, void *arg)

{

    apr_bucket_brigade *bb = (apr_bucket_brigade *)arg;

    const char *dst_end = buf + len - 1; /* leave room for terminating null */

    char *dst = buf;

    apr_bucket *e = APR_BRIGADE_FIRST(bb);

    apr_status_t rv;

    int done = 0;

    while ((dst < dst_end) && !done && e != APR_BRIGADE_SENTINEL(bb)

           && !APR_BUCKET_IS_EOS(e)) {

        const char *bucket_data;

        apr_size_t bucket_data_len;

        const char *src;

        const char *src_end;

        apr_bucket * next;

        rv = apr_bucket_read(e, &bucket_data, &bucket_data_len,

                             APR_BLOCK_READ);

        if (rv != APR_SUCCESS || (bucket_data_len == 0)) {

            *dst = '\0';

            return APR_STATUS_IS_TIMEUP(rv) ? -1 : 0;

        }

        src = bucket_data;

        src_end = bucket_data + bucket_data_len;

        while ((src < src_end) && (dst < dst_end) && !done) {

            if (*src == '\n') {

                done = 1;

            }

            else if (*src != '\r') {

                *dst++ = *src;

            }

            src++;

        }

        if (src < src_end) {

            apr_bucket_split(e, src - bucket_data);

        }

        next = APR_BUCKET_NEXT(e);

        apr_bucket_delete(e);

        e = next;

    }

    *dst = 0;

    return done;

}

AP_DECLARE(int) ap_scan_script_header_err_brigade(request_rec *r,

                                                  apr_bucket_brigade *bb,

                                                  char *buffer)

{

    return ap_scan_script_header_err_core_ex(r, buffer, getsfunc_BRIGADE, bb,

                                             APLOG_MODULE_INDEX);

}

AP_DECLARE(int) ap_scan_script_header_err_brigade_ex(request_rec *r,

                                                     apr_bucket_brigade *bb,

                                                     char *buffer,

                                                     int module_index)

{

    return ap_scan_script_header_err_core_ex(r, buffer, getsfunc_BRIGADE, bb,

                                             module_index);

}

struct vastrs {

    va_list args;

    int arg;

    const char *curpos;

};

static int getsfunc_STRING(char *w, int len, void *pvastrs)

{

    struct vastrs *strs = (struct vastrs*) pvastrs;

    const char *p;

    int t;

    if (!strs->curpos || !*strs->curpos) {

        w[0] = '\0';

        return 0;

    }

    p = ap_strchr_c(strs->curpos, '\n');

    if (p)

        ++p;

    else

        p = ap_strchr_c(strs->curpos, '\0');

    t = p - strs->curpos;

    if (t > len)

        t = len;

    strncpy (w, strs->curpos, t);

    w[t] = '\0';

    if (!strs->curpos[t]) {

        ++strs->arg;

        strs->curpos = va_arg(strs->args, const char *);

    }

    else

        strs->curpos += t;

    return t;

}

/* ap_scan_script_header_err_strs() accepts additional const char* args...

 * each is treated as one or more header lines, and the first non-header

 * character is returned to **arg, **data.  (The first optional arg is

 * counted as 0.)

 */

AP_DECLARE_NONSTD(int) ap_scan_script_header_err_strs_ex(request_rec *r,

                                                         char *buffer,

                                                         int module_index,

                                                         const char **termch,

                                                         int *termarg, ...)

{

    struct vastrs strs;

    int res;

    va_start(strs.args, termarg);

    strs.arg = 0;

    strs.curpos = va_arg(strs.args, char*);

    res = ap_scan_script_header_err_core_ex(r, buffer, getsfunc_STRING,

                                            (void *) &strs, module_index);

    if (termch)

        *termch = strs.curpos;

    if (termarg)

        *termarg = strs.arg;

    va_end(strs.args);

    return res;

}

AP_DECLARE_NONSTD(int) ap_scan_script_header_err_strs(request_rec *r,

                                                      char *buffer,

                                                      const char **termch,

                                                      int *termarg, ...)

{

    struct vastrs strs;

    int res;

    va_start(strs.args, termarg);

    strs.arg = 0;

    strs.curpos = va_arg(strs.args, char*);

    res = ap_scan_script_header_err_core_ex(r, buffer, getsfunc_STRING,

                                            (void *) &strs, APLOG_MODULE_INDEX);

    if (termch)

        *termch = strs.curpos;

    if (termarg)

        *termarg = strs.arg;

    va_end(strs.args);

    return res;

}

static void

argstr_to_table(char *str, apr_table_t *parms)

{

    char *key;

    char *value;

    char *strtok_state;

    if (str == NULL) {

        return;

    }

    key = apr_strtok(str, "&", &strtok_state);

    while (key) {

        value = strchr(key, '=');

        if (value) {