diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/server/util_script.c')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/server/util_script.c | 717 |
1 files changed, 717 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/server/util_script.c b/rubbos/app/httpd-2.0.64/server/util_script.c new file mode 100644 index 00000000..ad8d5745 --- /dev/null +++ b/rubbos/app/httpd-2.0.64/server/util_script.c @@ -0,0 +1,717 @@ +/* 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 + +#define CORE_PRIVATE +#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). + */ + +#define MALFORMED_MESSAGE "malformed header from script. Bad header=" +#define MALFORMED_HEADER_LENGTH_TO_SHOW 30 + +static char *http2env(apr_pool_t *a, const char *w) +{ + char *res = (char *)apr_palloc(a, 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++ = '_'; + } + else { + *cp++ = apr_toupper(c); + } + } + *cp = 0; + + return res; +} + +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 != '=') { + if (!apr_isalnum(*whack) && *whack != '_') { + *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; + const char *rem_logname; + char *env_path; +#if defined(WIN32) || defined(OS2) || defined(BEOS) + char *env_temp; +#endif + const char *host; + 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; + + /* 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); + } + /* + * 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")) { + continue; + } +#endif + else { + apr_table_addn(e, http2env(r->pool, hdrs[i].key), hdrs[i].val); + } + } + + if (!(env_path = getenv("PATH"))) { + env_path = DEFAULT_PATH; + } + apr_table_addn(e, "PATH", apr_pstrdup(r->pool, env_path)); + +#ifdef WIN32 + if (env_temp = getenv("SystemRoot")) { + apr_table_addn(e, "SystemRoot", env_temp); + } + if (env_temp = getenv("COMSPEC")) { + apr_table_addn(e, "COMSPEC", env_temp); + } + if (env_temp = getenv("PATHEXT")) { + apr_table_addn(e, "PATHEXT", env_temp); + } + if (env_temp = getenv("WINDIR")) { + apr_table_addn(e, "WINDIR", env_temp); + } +#endif + +#ifdef OS2 + if ((env_temp = getenv("COMSPEC")) != NULL) { + apr_table_addn(e, "COMSPEC", env_temp); + } + if ((env_temp = getenv("ETC")) != NULL) { + apr_table_addn(e, "ETC", env_temp); + } + if ((env_temp = getenv("DPATH")) != NULL) { + apr_table_addn(e, "DPATH", env_temp); + } + if ((env_temp = getenv("PERLLIB_PREFIX")) != NULL) { + apr_table_addn(e, "PERLLIB_PREFIX", env_temp); + } +#endif + +#ifdef BEOS + if ((env_temp = getenv("LIBRARY_PATH")) != NULL) { + apr_table_addn(e, "LIBRARY_PATH", env_temp); + } +#endif + + apr_table_addn(e, "SERVER_SIGNATURE", ap_psignature("", r)); + apr_table_addn(e, "SERVER_SOFTWARE", ap_get_server_version()); + apr_table_addn(e, "SERVER_NAME", + ap_escape_html(r->pool, ap_get_server_name(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))); + host = ap_get_remote_host(c, r->per_dir_config, REMOTE_HOST, NULL); + if (host) { + apr_table_addn(e, "REMOTE_HOST", host); + } + apr_table_addn(e, "REMOTE_ADDR", c->remote_ip); + apr_table_addn(e, "DOCUMENT_ROOT", ap_document_root(r)); /* Apache */ + apr_table_addn(e, "SERVER_ADMIN", s->server_admin); /* Apache */ + apr_table_addn(e, "SCRIPT_FILENAME", r->filename); /* Apache */ + + apr_sockaddr_port_get(&rport, c->remote_addr); + 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; + } + } + if (r->ap_auth_type) { + apr_table_addn(e, "AUTH_TYPE", r->ap_auth_type); + } + rem_logname = ap_get_remote_logname(r); + if (rem_logname) { + apr_table_addn(e, "REMOTE_IDENT", apr_pstrdup(r->pool, rem_logname)); + } + + /* Apache custom error responses. If we have redirected set two new vars */ + + if (r->prev) { + if (r->prev->args) { + apr_table_addn(e, "REDIRECT_QUERY_STRING", r->prev->args); + } + if (r->prev->uri) { + apr_table_addn(e, "REDIRECT_URL", r->prev->uri); + } + } + + 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 (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; + + 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 : ""); + apr_table_setn(e, "REQUEST_URI", original_uri(r)); + + /* 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) + +AP_DECLARE(int) ap_scan_script_header_err_core(request_rec *r, char *buffer, + int (*getsfunc) (char *, int, void *), + void *getsfunc_data) +{ + char x[MAX_STRING_LEN]; + char *w, *l; + int p; + int cgi_status = HTTP_UNSET; + apr_table_t *merge; + apr_table_t *cookie_table; + + 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) { + + if ((*getsfunc) (w, MAX_STRING_LEN - 1, getsfunc_data) == 0) { + ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_TOCLIENT, 0, r, + "Premature end of script headers: %s", + apr_filename_of_pathname(r->filename)); + return HTTP_INTERNAL_SERVER_ERROR; + } + + /* 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 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(APLOG_MARK, APLOG_ERR, 0, r->server, + "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, ':'))) { + char malformed[(sizeof MALFORMED_MESSAGE) + 1 + + MALFORMED_HEADER_LENGTH_TO_SHOW]; + + strcpy(malformed, MALFORMED_MESSAGE); + strncat(malformed, w, MALFORMED_HEADER_LENGTH_TO_SHOW); + + if (!buffer) { + /* Soak up all the script output - may save an outright kill */ + while ((*getsfunc) (w, MAX_STRING_LEN - 1, getsfunc_data)) { + continue; + } + } + + ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_TOCLIENT, 0, r, + "%s: %s", malformed, + apr_filename_of_pathname(r->filename)); + return HTTP_INTERNAL_SERVER_ERROR; + } + + *l++ = '\0'; + while (*l && 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); + 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); + } + /* + * 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); + } + } + + return OK; +} + +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(r, buffer, getsfunc_FILE, f); +} + +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 && !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 (!APR_STATUS_IS_SUCCESS(rv) || (bucket_data_len == 0)) { + return 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_REMOVE(e); + apr_bucket_destroy(e); + e = next; + } + *dst = 0; + return 1; +} + +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(r, buffer, getsfunc_BRIGADE, bb); +} + +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) + 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(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(r, buffer, getsfunc_STRING, (void *) &strs); + if (termch) + *termch = strs.curpos; + if (termarg) + *termarg = strs.arg; + va_end(strs.args); + return res; +} |