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author | 2015-11-30 01:45:08 -0500 | |
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committer | 2015-11-30 01:45:08 -0500 | |
commit | e8ec7aa8e38a93f5b034ac74cebce5de23710317 (patch) | |
tree | aa031937bf856c1f8d6ad7877b8d2cb0224da5ef /rubbos/app/httpd-2.0.64/server/util.c | |
parent | cc40af334e619bb549038238507407866f774f8f (diff) |
upload http
JIRA: BOTTLENECK-10
Change-Id: I7598427ff904df438ce77c2819ee48ac75ffa8da
Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/httpd-2.0.64/server/util.c')
-rw-r--r-- | rubbos/app/httpd-2.0.64/server/util.c | 2170 |
1 files changed, 2170 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/server/util.c b/rubbos/app/httpd-2.0.64/server/util.c new file mode 100644 index 00000000..a64f3bf9 --- /dev/null +++ b/rubbos/app/httpd-2.0.64/server/util.c @@ -0,0 +1,2170 @@ +/* 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. + */ + +/* + * util.c: string utility things + * + * 3/21/93 Rob McCool + * 1995-96 Many changes by the Apache Software Foundation + * + */ + +/* Debugging aid: + * #define DEBUG to trace all cfg_open*()/cfg_closefile() calls + * #define DEBUG_CFG_LINES to trace every line read from the config files + */ + +#include "apr.h" +#include "apr_strings.h" +#include "apr_lib.h" + +#define APR_WANT_STDIO +#define APR_WANT_STRFUNC +#include "apr_want.h" + +#if APR_HAVE_UNISTD_H +#include <unistd.h> +#endif +#if APR_HAVE_NETDB_H +#include <netdb.h> /* for gethostbyname() */ +#endif + +#define CORE_PRIVATE + +#include "ap_config.h" +#include "apr_base64.h" +#include "httpd.h" +#include "http_main.h" +#include "http_log.h" +#include "http_protocol.h" +#include "http_config.h" +#include "util_ebcdic.h" + +#ifdef HAVE_PWD_H +#include <pwd.h> +#endif +#ifdef HAVE_GRP_H +#include <grp.h> +#endif + +/* A bunch of functions in util.c scan strings looking for certain characters. + * To make that more efficient we encode a lookup table. The test_char_table + * is generated automatically by gen_test_char.c. + */ +#include "test_char.h" + +/* we assume the folks using this ensure 0 <= c < 256... which means + * you need a cast to (unsigned char) first, you can't just plug a + * char in here and get it to work, because if char is signed then it + * will first be sign extended. + */ +#define TEST_CHAR(c, f) (test_char_table[(unsigned)(c)] & (f)) + +/* Win32/NetWare/OS2 need to check for both forward and back slashes + * in ap_getparents() and ap_escape_url. + */ +#ifdef CASE_BLIND_FILESYSTEM +#define IS_SLASH(s) ((s == '/') || (s == '\\')) +#else +#define IS_SLASH(s) (s == '/') +#endif + + +/* + * Examine a field value (such as a media-/content-type) string and return + * it sans any parameters; e.g., strip off any ';charset=foo' and the like. + */ +AP_DECLARE(char *) ap_field_noparam(apr_pool_t *p, const char *intype) +{ + const char *semi; + + if (intype == NULL) return NULL; + + semi = ap_strchr_c(intype, ';'); + if (semi == NULL) { + return apr_pstrdup(p, intype); + } + else { + while ((semi > intype) && apr_isspace(semi[-1])) { + semi--; + } + return apr_pstrndup(p, intype, semi - intype); + } +} + +AP_DECLARE(char *) ap_ht_time(apr_pool_t *p, apr_time_t t, const char *fmt, + int gmt) +{ + apr_size_t retcode; + char ts[MAX_STRING_LEN]; + char tf[MAX_STRING_LEN]; + apr_time_exp_t xt; + + if (gmt) { + const char *f; + char *strp; + + apr_time_exp_gmt(&xt, t); + /* Convert %Z to "GMT" and %z to "+0000"; + * on hosts that do not have a time zone string in struct tm, + * strftime must assume its argument is local time. + */ + for(strp = tf, f = fmt; strp < tf + sizeof(tf) - 6 && (*strp = *f) + ; f++, strp++) { + if (*f != '%') continue; + switch (f[1]) { + case '%': + *++strp = *++f; + break; + case 'Z': + *strp++ = 'G'; + *strp++ = 'M'; + *strp = 'T'; + f++; + break; + case 'z': /* common extension */ + *strp++ = '+'; + *strp++ = '0'; + *strp++ = '0'; + *strp++ = '0'; + *strp = '0'; + f++; + break; + } + } + *strp = '\0'; + fmt = tf; + } + else { + apr_time_exp_lt(&xt, t); + } + + /* check return code? */ + apr_strftime(ts, &retcode, MAX_STRING_LEN, fmt, &xt); + ts[MAX_STRING_LEN - 1] = '\0'; + return apr_pstrdup(p, ts); +} + +/* Roy owes Rob beer. */ +/* Rob owes Roy dinner. */ + +/* These legacy comments would make a lot more sense if Roy hadn't + * replaced the old later_than() routine with util_date.c. + * + * Well, okay, they still wouldn't make any sense. + */ + +/* Match = 0, NoMatch = 1, Abort = -1 + * Based loosely on sections of wildmat.c by Rich Salz + * Hmmm... shouldn't this really go component by component? + */ +AP_DECLARE(int) ap_strcmp_match(const char *str, const char *expected) +{ + int x, y; + + for (x = 0, y = 0; expected[y]; ++y, ++x) { + if ((!str[x]) && (expected[y] != '*')) + return -1; + if (expected[y] == '*') { + while (expected[++y] == '*'); + if (!expected[y]) + return 0; + while (str[x]) { + int ret; + if ((ret = ap_strcmp_match(&str[x++], &expected[y])) != 1) + return ret; + } + return -1; + } + else if ((expected[y] != '?') && (str[x] != expected[y])) + return 1; + } + return (str[x] != '\0'); +} + +AP_DECLARE(int) ap_strcasecmp_match(const char *str, const char *expected) +{ + int x, y; + + for (x = 0, y = 0; expected[y]; ++y, ++x) { + if (!str[x] && expected[y] != '*') + return -1; + if (expected[y] == '*') { + while (expected[++y] == '*'); + if (!expected[y]) + return 0; + while (str[x]) { + int ret; + if ((ret = ap_strcasecmp_match(&str[x++], &expected[y])) != 1) + return ret; + } + return -1; + } + else if (expected[y] != '?' + && apr_tolower(str[x]) != apr_tolower(expected[y])) + return 1; + } + return (str[x] != '\0'); +} + +/* We actually compare the canonical root to this root, (but we don't + * waste time checking the case), since every use of this function in + * httpd-2.0 tests if the path is 'proper', meaning we've already passed + * it through apr_filepath_merge, or we haven't. + */ +AP_DECLARE(int) ap_os_is_path_absolute(apr_pool_t *p, const char *dir) +{ + const char *newpath; + const char *ourdir = dir; + if (apr_filepath_root(&newpath, &dir, 0, p) != APR_SUCCESS + || strncmp(newpath, ourdir, strlen(newpath)) != 0) { + return 0; + } + return 1; +} + +AP_DECLARE(int) ap_is_matchexp(const char *str) +{ + register int x; + + for (x = 0; str[x]; x++) + if ((str[x] == '*') || (str[x] == '?')) + return 1; + return 0; +} + +/* + * Here's a pool-based interface to POSIX regex's regcomp(). + * Note that we return regex_t instead of being passed one. + * The reason is that if you use an already-used regex_t structure, + * the memory that you've already allocated gets forgotten, and + * regfree() doesn't clear it. So we don't allow it. + */ + +static apr_status_t regex_cleanup(void *preg) +{ + regfree((regex_t *) preg); + return APR_SUCCESS; +} + +AP_DECLARE(regex_t *) ap_pregcomp(apr_pool_t *p, const char *pattern, + int cflags) +{ + regex_t *preg = apr_palloc(p, sizeof(regex_t)); + + if (regcomp(preg, pattern, cflags)) { + return NULL; + } + + apr_pool_cleanup_register(p, (void *) preg, regex_cleanup, + apr_pool_cleanup_null); + + return preg; +} + +AP_DECLARE(void) ap_pregfree(apr_pool_t *p, regex_t * reg) +{ + regfree(reg); + apr_pool_cleanup_kill(p, (void *) reg, regex_cleanup); +} + +/* + * Similar to standard strstr() but we ignore case in this version. + * Based on the strstr() implementation further below. + */ +AP_DECLARE(char *) ap_strcasestr(const char *s1, const char *s2) +{ + char *p1, *p2; + if (*s2 == '\0') { + /* an empty s2 */ + return((char *)s1); + } + while(1) { + for ( ; (*s1 != '\0') && (apr_tolower(*s1) != apr_tolower(*s2)); s1++); + if (*s1 == '\0') { + return(NULL); + } + /* found first character of s2, see if the rest matches */ + p1 = (char *)s1; + p2 = (char *)s2; + for (++p1, ++p2; apr_tolower(*p1) == apr_tolower(*p2); ++p1, ++p2) { + if (*p1 == '\0') { + /* both strings ended together */ + return((char *)s1); + } + } + if (*p2 == '\0') { + /* second string ended, a match */ + break; + } + /* didn't find a match here, try starting at next character in s1 */ + s1++; + } + return((char *)s1); +} + +/* + * Returns an offsetted pointer in bigstring immediately after + * prefix. Returns bigstring if bigstring doesn't start with + * prefix or if prefix is longer than bigstring while still matching. + * NOTE: pointer returned is relative to bigstring, so we + * can use standard pointer comparisons in the calling function + * (eg: test if ap_stripprefix(a,b) == a) + */ +AP_DECLARE(const char *) ap_stripprefix(const char *bigstring, + const char *prefix) +{ + const char *p1; + + if (*prefix == '\0') + return bigstring; + + p1 = bigstring; + while (*p1 && *prefix) { + if (*p1++ != *prefix++) + return bigstring; + } + if (*prefix == '\0') + return p1; + + /* hit the end of bigstring! */ + return bigstring; +} + +/* + * Apache stub function for the regex libraries regexec() to make sure the + * whole regex(3) API is available through the Apache (exported) namespace. + * This is especially important for the DSO situations of modules. + * DO NOT MAKE A MACRO OUT OF THIS FUNCTION! + */ +AP_DECLARE(int) ap_regexec(regex_t *preg, const char *string, + size_t nmatch, regmatch_t pmatch[], int eflags) +{ + return regexec(preg, string, nmatch, pmatch, eflags); +} + +AP_DECLARE(size_t) ap_regerror(int errcode, const regex_t *preg, char *errbuf, + size_t errbuf_size) +{ + return regerror(errcode, preg, errbuf, errbuf_size); +} + + +/* This function substitutes for $0-$9, filling in regular expression + * submatches. Pass it the same nmatch and pmatch arguments that you + * passed ap_regexec(). pmatch should not be greater than the maximum number + * of subexpressions - i.e. one more than the re_nsub member of regex_t. + * + * input should be the string with the $-expressions, source should be the + * string that was matched against. + * + * It returns the substituted string, or NULL on error. + * + * Parts of this code are based on Henry Spencer's regsub(), from his + * AT&T V8 regexp package. + */ + +AP_DECLARE(char *) ap_pregsub(apr_pool_t *p, const char *input, + const char *source, size_t nmatch, + regmatch_t pmatch[]) +{ + const char *src = input; + char *dest, *dst; + char c; + size_t no; + int len; + + if (!source) + return NULL; + if (!nmatch) + return apr_pstrdup(p, src); + + /* First pass, find the size */ + + len = 0; + + while ((c = *src++) != '\0') { + if (c == '&') + no = 0; + else if (c == '$' && apr_isdigit(*src)) + no = *src++ - '0'; + else + no = 10; + + if (no > 9) { /* Ordinary character. */ + if (c == '\\' && (*src == '$' || *src == '&')) + c = *src++; + len++; + } + else if (no < nmatch && pmatch[no].rm_so < pmatch[no].rm_eo) { + len += pmatch[no].rm_eo - pmatch[no].rm_so; + } + + } + + dest = dst = apr_pcalloc(p, len + 1); + + /* Now actually fill in the string */ + + src = input; + + while ((c = *src++) != '\0') { + if (c == '&') + no = 0; + else if (c == '$' && apr_isdigit(*src)) + no = *src++ - '0'; + else + no = 10; + + if (no > 9) { /* Ordinary character. */ + if (c == '\\' && (*src == '$' || *src == '&')) + c = *src++; + *dst++ = c; + } + else if (no < nmatch && pmatch[no].rm_so < pmatch[no].rm_eo) { + len = pmatch[no].rm_eo - pmatch[no].rm_so; + memcpy(dst, source + pmatch[no].rm_so, len); + dst += len; + } + + } + *dst = '\0'; + + return dest; +} + +/* + * Parse .. so we don't compromise security + */ +AP_DECLARE(void) ap_getparents(char *name) +{ + char *next; + int l, w, first_dot; + + /* Four paseses, as per RFC 1808 */ + /* a) remove ./ path segments */ + for (next = name; *next && (*next != '.'); next++) { + } + + l = w = first_dot = next - name; + while (name[l] != '\0') { + if (name[l] == '.' && IS_SLASH(name[l + 1]) + && (l == 0 || IS_SLASH(name[l - 1]))) + l += 2; + else + name[w++] = name[l++]; + } + + /* b) remove trailing . path, segment */ + if (w == 1 && name[0] == '.') + w--; + else if (w > 1 && name[w - 1] == '.' && IS_SLASH(name[w - 2])) + w--; + name[w] = '\0'; + + /* c) remove all xx/../ segments. (including leading ../ and /../) */ + l = first_dot; + + while (name[l] != '\0') { + if (name[l] == '.' && name[l + 1] == '.' && IS_SLASH(name[l + 2]) + && (l == 0 || IS_SLASH(name[l - 1]))) { + register int m = l + 3, n; + + l = l - 2; + if (l >= 0) { + while (l >= 0 && !IS_SLASH(name[l])) + l--; + l++; + } + else + l = 0; + n = l; + while ((name[n] = name[m])) + (++n, ++m); + } + else + ++l; + } + + /* d) remove trailing xx/.. segment. */ + if (l == 2 && name[0] == '.' && name[1] == '.') + name[0] = '\0'; + else if (l > 2 && name[l - 1] == '.' && name[l - 2] == '.' + && IS_SLASH(name[l - 3])) { + l = l - 4; + if (l >= 0) { + while (l >= 0 && !IS_SLASH(name[l])) + l--; + l++; + } + else + l = 0; + name[l] = '\0'; + } +} + +AP_DECLARE(void) ap_no2slash(char *name) +{ + char *d, *s; + + s = d = name; + +#ifdef HAVE_UNC_PATHS + /* Check for UNC names. Leave leading two slashes. */ + if (s[0] == '/' && s[1] == '/') + *d++ = *s++; +#endif + + while (*s) { + if ((*d++ = *s) == '/') { + do { + ++s; + } while (*s == '/'); + } + else { + ++s; + } + } + *d = '\0'; +} + + +/* + * copy at most n leading directories of s into d + * d should be at least as large as s plus 1 extra byte + * assumes n > 0 + * the return value is the ever useful pointer to the trailing \0 of d + * + * MODIFIED FOR HAVE_DRIVE_LETTERS and NETWARE environments, + * so that if n == 0, "/" is returned in d with n == 1 + * and s == "e:/test.html", "e:/" is returned in d + * *** See also directory_walk in modules/http/http_request.c + + * examples: + * /a/b, 0 ==> / (true for all platforms) + * /a/b, 1 ==> / + * /a/b, 2 ==> /a/ + * /a/b, 3 ==> /a/b/ + * /a/b, 4 ==> /a/b/ + * + * c:/a/b 0 ==> / + * c:/a/b 1 ==> c:/ + * c:/a/b 2 ==> c:/a/ + * c:/a/b 3 ==> c:/a/b + * c:/a/b 4 ==> c:/a/b + */ +AP_DECLARE(char *) ap_make_dirstr_prefix(char *d, const char *s, int n) +{ + if (n < 1) { + *d = '/'; + *++d = '\0'; + return (d); + } + + for (;;) { + if (*s == '\0' || (*s == '/' && (--n) == 0)) { + *d = '/'; + break; + } + *d++ = *s++; + } + *++d = 0; + return (d); +} + + +/* + * return the parent directory name including trailing / of the file s + */ +AP_DECLARE(char *) ap_make_dirstr_parent(apr_pool_t *p, const char *s) +{ + const char *last_slash = ap_strrchr_c(s, '/'); + char *d; + int l; + + if (last_slash == NULL) { + return apr_pstrdup(p, ""); + } + l = (last_slash - s) + 1; + d = apr_palloc(p, l + 1); + memcpy(d, s, l); + d[l] = 0; + return (d); +} + + +AP_DECLARE(int) ap_count_dirs(const char *path) +{ + register int x, n; + + for (x = 0, n = 0; path[x]; x++) + if (path[x] == '/') + n++; + return n; +} + +AP_DECLARE(char *) ap_getword_nc(apr_pool_t *atrans, char **line, char stop) +{ + return ap_getword(atrans, (const char **) line, stop); +} + +AP_DECLARE(char *) ap_getword(apr_pool_t *atrans, const char **line, char stop) +{ + const char *pos = *line; + int len; + char *res; + + while ((*pos != stop) && *pos) { + ++pos; + } + + len = pos - *line; + res = (char *)apr_palloc(atrans, len + 1); + memcpy(res, *line, len); + res[len] = 0; + + if (stop) { + while (*pos == stop) { + ++pos; + } + } + *line = pos; + + return res; +} + +AP_DECLARE(char *) ap_getword_white_nc(apr_pool_t *atrans, char **line) +{ + return ap_getword_white(atrans, (const char **) line); +} + +AP_DECLARE(char *) ap_getword_white(apr_pool_t *atrans, const char **line) +{ + const char *pos = *line; + int len; + char *res; + + while (!apr_isspace(*pos) && *pos) { + ++pos; + } + + len = pos - *line; + res = (char *)apr_palloc(atrans, len + 1); + memcpy(res, *line, len); + res[len] = 0; + + while (apr_isspace(*pos)) { + ++pos; + } + + *line = pos; + + return res; +} + +AP_DECLARE(char *) ap_getword_nulls_nc(apr_pool_t *atrans, char **line, + char stop) +{ + return ap_getword_nulls(atrans, (const char **) line, stop); +} + +AP_DECLARE(char *) ap_getword_nulls(apr_pool_t *atrans, const char **line, + char stop) +{ + const char *pos = ap_strchr_c(*line, stop); + char *res; + + if (!pos) { + res = apr_pstrdup(atrans, *line); + *line += strlen(*line); + return res; + } + + res = apr_pstrndup(atrans, *line, pos - *line); + + ++pos; + + *line = pos; + + return res; +} + +/* Get a word, (new) config-file style --- quoted strings and backslashes + * all honored + */ + +static char *substring_conf(apr_pool_t *p, const char *start, int len, + char quote) +{ + char *result = apr_palloc(p, len + 2); + char *resp = result; + int i; + + for (i = 0; i < len; ++i) { + if (start[i] == '\\' && (start[i + 1] == '\\' + || (quote && start[i + 1] == quote))) + *resp++ = start[++i]; + else + *resp++ = start[i]; + } + + *resp++ = '\0'; +#if RESOLVE_ENV_PER_TOKEN + return (char *)ap_resolve_env(p,result); +#else + return result; +#endif +} + +AP_DECLARE(char *) ap_getword_conf_nc(apr_pool_t *p, char **line) +{ + return ap_getword_conf(p, (const char **) line); +} + +AP_DECLARE(char *) ap_getword_conf(apr_pool_t *p, const char **line) +{ + const char *str = *line, *strend; + char *res; + char quote; + + while (*str && apr_isspace(*str)) + ++str; + + if (!*str) { + *line = str; + return ""; + } + + if ((quote = *str) == '"' || quote == '\'') { + strend = str + 1; + while (*strend && *strend != quote) { + if (*strend == '\\' && strend[1] && strend[1] == quote) + strend += 2; + else + ++strend; + } + res = substring_conf(p, str + 1, strend - str - 1, quote); + + if (*strend == quote) + ++strend; + } + else { + strend = str; + while (*strend && !apr_isspace(*strend)) + ++strend; + + res = substring_conf(p, str, strend - str, 0); + } + + while (*strend && apr_isspace(*strend)) + ++strend; + *line = strend; + return res; +} + +/* Check a string for any ${ENV} environment variable + * construct and replace each them by the value of + * that environment variable, if it exists. If the + * environment value does not exist, leave the ${ENV} + * construct alone; it means something else. + */ +AP_DECLARE(const char *) ap_resolve_env(apr_pool_t *p, const char * word) +{ +# define SMALL_EXPANSION 5 + struct sll { + struct sll *next; + const char *string; + apr_size_t len; + } *result, *current, sresult[SMALL_EXPANSION]; + char *res_buf, *cp; + const char *s, *e, *ep; + unsigned spc; + apr_size_t outlen; + + s = ap_strchr_c(word, '$'); + if (!s) { + return word; + } + + /* well, actually something to do */ + ep = word + strlen(word); + spc = 0; + result = current = &(sresult[spc++]); + current->next = NULL; + current->string = word; + current->len = s - word; + outlen = current->len; + + do { + /* prepare next entry */ + if (current->len) { + current->next = (spc < SMALL_EXPANSION) + ? &(sresult[spc++]) + : (struct sll *)apr_palloc(p, + sizeof(*current->next)); + current = current->next; + current->next = NULL; + current->len = 0; + } + + if (*s == '$') { + if (s[1] == '{' && (e = ap_strchr_c(s, '}'))) { + word = getenv(apr_pstrndup(p, s+2, e-s-2)); + if (word) { + current->string = word; + current->len = strlen(word); + outlen += current->len; + } + else { + current->string = s; + current->len = e - s + 1; + outlen += current->len; + } + s = e + 1; + } + else { + current->string = s++; + current->len = 1; + ++outlen; + } + } + else { + word = s; + s = ap_strchr_c(s, '$'); + current->string = word; + current->len = s ? s - word : ep - word; + outlen += current->len; + } + } while (s && *s); + + /* assemble result */ + res_buf = cp = apr_palloc(p, outlen + 1); + do { + if (result->len) { + memcpy(cp, result->string, result->len); + cp += result->len; + } + result = result->next; + } while (result); + res_buf[outlen] = '\0'; + + return res_buf; +} + +AP_DECLARE(int) ap_cfg_closefile(ap_configfile_t *cfp) +{ +#ifdef DEBUG + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, NULL, + "Done with config file %s", cfp->name); +#endif + return (cfp->close == NULL) ? 0 : cfp->close(cfp->param); +} + +static apr_status_t cfg_close(void *param) +{ + apr_file_t *cfp = (apr_file_t *) param; + return (apr_file_close(cfp)); +} + +static int cfg_getch(void *param) +{ + char ch; + apr_file_t *cfp = (apr_file_t *) param; + if (apr_file_getc(&ch, cfp) == APR_SUCCESS) + return ch; + return (int)EOF; +} + +static void *cfg_getstr(void *buf, size_t bufsiz, void *param) +{ + apr_file_t *cfp = (apr_file_t *) param; + apr_status_t rv; + rv = apr_file_gets(buf, bufsiz, cfp); + if (rv == APR_SUCCESS || (APR_STATUS_IS_EOF(rv) && strcmp(buf, ""))) + return buf; + return NULL; +} + +/* Open a ap_configfile_t as FILE, return open ap_configfile_t struct pointer */ +AP_DECLARE(apr_status_t) ap_pcfg_openfile(ap_configfile_t **ret_cfg, + apr_pool_t *p, const char *name) +{ + ap_configfile_t *new_cfg; + apr_file_t *file = NULL; + apr_finfo_t finfo; + apr_status_t status; +#ifdef DEBUG + char buf[120]; +#endif + + if (name == NULL) { + ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL, + "Internal error: pcfg_openfile() called with NULL filename"); + return APR_EBADF; + } + + status = apr_file_open(&file, name, APR_READ | APR_BUFFERED, + APR_OS_DEFAULT, p); +#ifdef DEBUG + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, NULL, + "Opening config file %s (%s)", + name, (status != APR_SUCCESS) ? + apr_strerror(status, buf, sizeof(buf)) : "successful"); +#endif + if (status != APR_SUCCESS) + return status; + + status = apr_file_info_get(&finfo, APR_FINFO_TYPE, file); + if (status != APR_SUCCESS) + return status; + + if (finfo.filetype != APR_REG && +#if defined(WIN32) || defined(OS2) || defined(NETWARE) + strcasecmp(apr_filename_of_pathname(name), "nul") != 0) { +#else + strcmp(name, "/dev/null") != 0) { +#endif /* WIN32 || OS2 */ + ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL, + "Access to file %s denied by server: not a regular file", + name); + apr_file_close(file); + return APR_EBADF; + } + +#ifdef WIN32 + /* Some twisted character [no pun intended] at MS decided that a + * zero width joiner as the lead wide character would be ideal for + * describing Unicode text files. This was further convoluted to + * another MSism that the same character mapped into utf-8, EF BB BF + * would signify utf-8 text files. + * + * Since MS configuration files are all protecting utf-8 encoded + * Unicode path, file and resource names, we already have the correct + * WinNT encoding. But at least eat the stupid three bytes up front. + */ + { + unsigned char buf[4]; + apr_size_t len = 3; + status = apr_file_read(file, buf, &len); + if ((status != APR_SUCCESS) || (len < 3) + || memcmp(buf, "\xEF\xBB\xBF", 3) != 0) { + apr_off_t zero = 0; + apr_file_seek(file, APR_SET, &zero); + } + } +#endif + + new_cfg = apr_palloc(p, sizeof(*new_cfg)); + new_cfg->param = file; + new_cfg->name = apr_pstrdup(p, name); + new_cfg->getch = (int (*)(void *)) cfg_getch; + new_cfg->getstr = (void *(*)(void *, size_t, void *)) cfg_getstr; + new_cfg->close = (int (*)(void *)) cfg_close; + new_cfg->line_number = 0; + *ret_cfg = new_cfg; + return APR_SUCCESS; +} + + +/* Allocate a ap_configfile_t handle with user defined functions and params */ +AP_DECLARE(ap_configfile_t *) ap_pcfg_open_custom(apr_pool_t *p, + const char *descr, + void *param, + int(*getch)(void *param), + void *(*getstr) (void *buf, size_t bufsiz, void *param), + int(*close_func)(void *param)) +{ + ap_configfile_t *new_cfg = apr_palloc(p, sizeof(*new_cfg)); +#ifdef DEBUG + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, NULL, + "Opening config handler %s", descr); +#endif + new_cfg->param = param; + new_cfg->name = descr; + new_cfg->getch = getch; + new_cfg->getstr = getstr; + new_cfg->close = close_func; + new_cfg->line_number = 0; + return new_cfg; +} + +/* Read one character from a configfile_t */ +AP_DECLARE(int) ap_cfg_getc(ap_configfile_t *cfp) +{ + register int ch = cfp->getch(cfp->param); + if (ch == LF) + ++cfp->line_number; + return ch; +} + +/* Read one line from open ap_configfile_t, strip LF, increase line number */ +/* If custom handler does not define a getstr() function, read char by char */ +AP_DECLARE(int) ap_cfg_getline(char *buf, size_t bufsize, ap_configfile_t *cfp) +{ + /* If a "get string" function is defined, use it */ + if (cfp->getstr != NULL) { + char *src, *dst; + char *cp; + char *cbuf = buf; + size_t cbufsize = bufsize; + + while (1) { + ++cfp->line_number; + if (cfp->getstr(cbuf, cbufsize, cfp->param) == NULL) + return 1; + + /* + * check for line continuation, + * i.e. match [^\\]\\[\r]\n only + */ + cp = cbuf; + while (cp < cbuf+cbufsize && *cp != '\0') + cp++; + if (cp > cbuf && cp[-1] == LF) { + cp--; + if (cp > cbuf && cp[-1] == CR) + cp--; + if (cp > cbuf && cp[-1] == '\\') { + cp--; + if (!(cp > cbuf && cp[-1] == '\\')) { + /* + * line continuation requested - + * then remove backslash and continue + */ + cbufsize -= (cp-cbuf); + cbuf = cp; + continue; + } + else { + /* + * no real continuation because escaped - + * then just remove escape character + */ + for ( ; cp < cbuf+cbufsize && *cp != '\0'; cp++) + cp[0] = cp[1]; + } + } + } + break; + } + + /* + * Leading and trailing white space is eliminated completely + */ + src = buf; + while (apr_isspace(*src)) + ++src; + /* blast trailing whitespace */ + dst = &src[strlen(src)]; + while (--dst >= src && apr_isspace(*dst)) + *dst = '\0'; + /* Zap leading whitespace by shifting */ + if (src != buf) + for (dst = buf; (*dst++ = *src++) != '\0'; ) + ; + +#ifdef DEBUG_CFG_LINES + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, NULL, "Read config: %s", buf); +#endif + return 0; + } else { + /* No "get string" function defined; read character by character */ + register int c; + register size_t i = 0; + + buf[0] = '\0'; + /* skip leading whitespace */ + do { + c = cfp->getch(cfp->param); + } while (c == '\t' || c == ' '); + + if (c == EOF) + return 1; + + if(bufsize < 2) { + /* too small, assume caller is crazy */ + return 1; + } + + while (1) { + if ((c == '\t') || (c == ' ')) { + buf[i++] = ' '; + while ((c == '\t') || (c == ' ')) + c = cfp->getch(cfp->param); + } + if (c == CR) { + /* silently ignore CR (_assume_ that a LF follows) */ + c = cfp->getch(cfp->param); + } + if (c == LF) { + /* increase line number and return on LF */ + ++cfp->line_number; + } + if (c == EOF || c == 0x4 || c == LF || i >= (bufsize - 2)) { + /* + * check for line continuation + */ + if (i > 0 && buf[i-1] == '\\') { + i--; + if (!(i > 0 && buf[i-1] == '\\')) { + /* line is continued */ + c = cfp->getch(cfp->param); + continue; + } + /* else nothing needs be done because + * then the backslash is escaped and + * we just strip to a single one + */ + } + /* blast trailing whitespace */ + while (i > 0 && apr_isspace(buf[i - 1])) + --i; + buf[i] = '\0'; +#ifdef DEBUG_CFG_LINES + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, NULL, + "Read config: %s", buf); +#endif + return 0; + } + buf[i] = c; + ++i; + c = cfp->getch(cfp->param); + } + } +} + +/* Size an HTTP header field list item, as separated by a comma. + * The return value is a pointer to the beginning of the non-empty list item + * within the original string (or NULL if there is none) and the address + * of field is shifted to the next non-comma, non-whitespace character. + * len is the length of the item excluding any beginning whitespace. + */ +AP_DECLARE(const char *) ap_size_list_item(const char **field, int *len) +{ + const unsigned char *ptr = (const unsigned char *)*field; + const unsigned char *token; + int in_qpair, in_qstr, in_com; + + /* Find first non-comma, non-whitespace byte */ + + while (*ptr == ',' || apr_isspace(*ptr)) + ++ptr; + + token = ptr; + + /* Find the end of this item, skipping over dead bits */ + + for (in_qpair = in_qstr = in_com = 0; + *ptr && (in_qpair || in_qstr || in_com || *ptr != ','); + ++ptr) { + + if (in_qpair) { + in_qpair = 0; + } + else { + switch (*ptr) { + case '\\': in_qpair = 1; /* quoted-pair */ + break; + case '"' : if (!in_com) /* quoted string delim */ + in_qstr = !in_qstr; + break; + case '(' : if (!in_qstr) /* comment (may nest) */ + ++in_com; + break; + case ')' : if (in_com) /* end comment */ + --in_com; + break; + default : break; + } + } + } + + if ((*len = (ptr - token)) == 0) { + *field = (const char *)ptr; + return NULL; + } + + /* Advance field pointer to the next non-comma, non-white byte */ + + while (*ptr == ',' || apr_isspace(*ptr)) + ++ptr; + + *field = (const char *)ptr; + return (const char *)token; +} + +/* Retrieve an HTTP header field list item, as separated by a comma, + * while stripping insignificant whitespace and lowercasing anything not in + * a quoted string or comment. The return value is a new string containing + * the converted list item (or NULL if none) and the address pointed to by + * field is shifted to the next non-comma, non-whitespace. + */ +AP_DECLARE(char *) ap_get_list_item(apr_pool_t *p, const char **field) +{ + const char *tok_start; + const unsigned char *ptr; + unsigned char *pos; + char *token; + int addspace = 0, in_qpair = 0, in_qstr = 0, in_com = 0, tok_len = 0; + + /* Find the beginning and maximum length of the list item so that + * we can allocate a buffer for the new string and reset the field. + */ + if ((tok_start = ap_size_list_item(field, &tok_len)) == NULL) { + return NULL; + } + token = apr_palloc(p, tok_len + 1); + + /* Scan the token again, but this time copy only the good bytes. + * We skip extra whitespace and any whitespace around a '=', '/', + * or ';' and lowercase normal characters not within a comment, + * quoted-string or quoted-pair. + */ + for (ptr = (const unsigned char *)tok_start, pos = (unsigned char *)token; + *ptr && (in_qpair || in_qstr || in_com || *ptr != ','); + ++ptr) { + + if (in_qpair) { + in_qpair = 0; + *pos++ = *ptr; + } + else { + switch (*ptr) { + case '\\': in_qpair = 1; + if (addspace == 1) + *pos++ = ' '; + *pos++ = *ptr; + addspace = 0; + break; + case '"' : if (!in_com) + in_qstr = !in_qstr; + if (addspace == 1) + *pos++ = ' '; + *pos++ = *ptr; + addspace = 0; + break; + case '(' : if (!in_qstr) + ++in_com; + if (addspace == 1) + *pos++ = ' '; + *pos++ = *ptr; + addspace = 0; + break; + case ')' : if (in_com) + --in_com; + *pos++ = *ptr; + addspace = 0; + break; + case ' ' : + case '\t': if (addspace) + break; + if (in_com || in_qstr) + *pos++ = *ptr; + else + addspace = 1; + break; + case '=' : + case '/' : + case ';' : if (!(in_com || in_qstr)) + addspace = -1; + *pos++ = *ptr; + break; + default : if (addspace == 1) + *pos++ = ' '; + *pos++ = (in_com || in_qstr) ? *ptr + : apr_tolower(*ptr); + addspace = 0; + break; + } + } + } + *pos = '\0'; + + return token; +} + +/* Find an item in canonical form (lowercase, no extra spaces) within + * an HTTP field value list. Returns 1 if found, 0 if not found. + * This would be much more efficient if we stored header fields as + * an array of list items as they are received instead of a plain string. + */ +AP_DECLARE(int) ap_find_list_item(apr_pool_t *p, const char *line, + const char *tok) +{ + const unsigned char *pos; + const unsigned char *ptr = (const unsigned char *)line; + int good = 0, addspace = 0, in_qpair = 0, in_qstr = 0, in_com = 0; + + if (!line || !tok) + return 0; + + do { /* loop for each item in line's list */ + + /* Find first non-comma, non-whitespace byte */ + + while (*ptr == ',' || apr_isspace(*ptr)) + ++ptr; + + if (*ptr) + good = 1; /* until proven otherwise for this item */ + else + break; /* no items left and nothing good found */ + + /* We skip extra whitespace and any whitespace around a '=', '/', + * or ';' and lowercase normal characters not within a comment, + * quoted-string or quoted-pair. + */ + for (pos = (const unsigned char *)tok; + *ptr && (in_qpair || in_qstr || in_com || *ptr != ','); + ++ptr) { + + if (in_qpair) { + in_qpair = 0; + if (good) + good = (*pos++ == *ptr); + } + else { + switch (*ptr) { + case '\\': in_qpair = 1; + if (addspace == 1) + good = good && (*pos++ == ' '); + good = good && (*pos++ == *ptr); + addspace = 0; + break; + case '"' : if (!in_com) + in_qstr = !in_qstr; + if (addspace == 1) + good = good && (*pos++ == ' '); + good = good && (*pos++ == *ptr); + addspace = 0; + break; + case '(' : if (!in_qstr) + ++in_com; + if (addspace == 1) + good = good && (*pos++ == ' '); + good = good && (*pos++ == *ptr); + addspace = 0; + break; + case ')' : if (in_com) + --in_com; + good = good && (*pos++ == *ptr); + addspace = 0; + break; + case ' ' : + case '\t': if (addspace || !good) + break; + if (in_com || in_qstr) + good = (*pos++ == *ptr); + else + addspace = 1; + break; + case '=' : + case '/' : + case ';' : if (!(in_com || in_qstr)) + addspace = -1; + good = good && (*pos++ == *ptr); + break; + default : if (!good) + break; + if (addspace == 1) + good = (*pos++ == ' '); + if (in_com || in_qstr) + good = good && (*pos++ == *ptr); + else + good = good && (*pos++ == apr_tolower(*ptr)); + addspace = 0; + break; + } + } + } + if (good && *pos) + good = 0; /* not good if only a prefix was matched */ + + } while (*ptr && !good); + + return good; +} + + +/* Retrieve a token, spacing over it and returning a pointer to + * the first non-white byte afterwards. Note that these tokens + * are delimited by semis and commas; and can also be delimited + * by whitespace at the caller's option. + */ + +AP_DECLARE(char *) ap_get_token(apr_pool_t *p, const char **accept_line, + int accept_white) +{ + const char *ptr = *accept_line; + const char *tok_start; + char *token; + int tok_len; + + /* Find first non-white byte */ + + while (*ptr && apr_isspace(*ptr)) + ++ptr; + + tok_start = ptr; + + /* find token end, skipping over quoted strings. + * (comments are already gone). + */ + + while (*ptr && (accept_white || !apr_isspace(*ptr)) + && *ptr != ';' && *ptr != ',') { + if (*ptr++ == '"') + while (*ptr) + if (*ptr++ == '"') + break; + } + + tok_len = ptr - tok_start; + token = apr_pstrndup(p, tok_start, tok_len); + + /* Advance accept_line pointer to the next non-white byte */ + + while (*ptr && apr_isspace(*ptr)) + ++ptr; + + *accept_line = ptr; + return token; +} + + +/* find http tokens, see the definition of token from RFC2068 */ +AP_DECLARE(int) ap_find_token(apr_pool_t *p, const char *line, const char *tok) +{ + const unsigned char *start_token; + const unsigned char *s; + + if (!line) + return 0; + + s = (const unsigned char *)line; + for (;;) { + /* find start of token, skip all stop characters, note NUL + * isn't a token stop, so we don't need to test for it + */ + while (TEST_CHAR(*s, T_HTTP_TOKEN_STOP)) { + ++s; + } + if (!*s) { + return 0; + } + start_token = s; + /* find end of the token */ + while (*s && !TEST_CHAR(*s, T_HTTP_TOKEN_STOP)) { + ++s; + } + if (!strncasecmp((const char *)start_token, (const char *)tok, + s - start_token)) { + return 1; + } + if (!*s) { + return 0; + } + } +} + + +AP_DECLARE(int) ap_find_last_token(apr_pool_t *p, const char *line, + const char *tok) +{ + int llen, tlen, lidx; + + if (!line) + return 0; + + llen = strlen(line); + tlen = strlen(tok); + lidx = llen - tlen; + + if (lidx < 0 || + (lidx > 0 && !(apr_isspace(line[lidx - 1]) || line[lidx - 1] == ','))) + return 0; + + return (strncasecmp(&line[lidx], tok, tlen) == 0); +} + +AP_DECLARE(char *) ap_escape_shell_cmd(apr_pool_t *p, const char *str) +{ + char *cmd; + unsigned char *d; + const unsigned char *s; + + cmd = apr_palloc(p, 2 * strlen(str) + 1); /* Be safe */ + d = (unsigned char *)cmd; + s = (const unsigned char *)str; + for (; *s; ++s) { + +#if defined(OS2) || defined(WIN32) + /* + * Newlines to Win32/OS2 CreateProcess() are ill advised. + * Convert them to spaces since they are effectively white + * space to most applications + */ + if (*s == '\r' || *s == '\n') { + *d++ = ' '; + continue; + } +#endif + + if (TEST_CHAR(*s, T_ESCAPE_SHELL_CMD)) { + *d++ = '\\'; + } + *d++ = *s; + } + *d = '\0'; + + return cmd; +} + +static char x2c(const char *what) +{ + register char digit; + +#if !APR_CHARSET_EBCDIC + digit = ((what[0] >= 'A') ? ((what[0] & 0xdf) - 'A') + 10 + : (what[0] - '0')); + digit *= 16; + digit += (what[1] >= 'A' ? ((what[1] & 0xdf) - 'A') + 10 + : (what[1] - '0')); +#else /*APR_CHARSET_EBCDIC*/ + char xstr[5]; + xstr[0]='0'; + xstr[1]='x'; + xstr[2]=what[0]; + xstr[3]=what[1]; + xstr[4]='\0'; + digit = apr_xlate_conv_byte(ap_hdrs_from_ascii, + 0xFF & strtol(xstr, NULL, 16)); +#endif /*APR_CHARSET_EBCDIC*/ + return (digit); +} + +/* + * Unescapes a URL. + * Returns 0 on success, non-zero on error + * Failure is due to + * bad % escape returns HTTP_BAD_REQUEST + * + * decoding %00 -> \0 (the null character) + * decoding %2f -> / (a special character) + * returns HTTP_NOT_FOUND + */ +AP_DECLARE(int) ap_unescape_url(char *url) +{ + register int badesc, badpath; + char *x, *y; + + badesc = 0; + badpath = 0; + /* Initial scan for first '%'. Don't bother writing values before + * seeing a '%' */ + y = strchr(url, '%'); + if (y == NULL) { + return OK; + } + for (x = y; *y; ++x, ++y) { + if (*y != '%') + *x = *y; + else { + if (!apr_isxdigit(*(y + 1)) || !apr_isxdigit(*(y + 2))) { + badesc = 1; + *x = '%'; + } + else { + *x = x2c(y + 1); + y += 2; + if (IS_SLASH(*x) || *x == '\0') + badpath = 1; + } + } + } + *x = '\0'; + if (badesc) + return HTTP_BAD_REQUEST; + else if (badpath) + return HTTP_NOT_FOUND; + else + return OK; +} + +AP_DECLARE(int) ap_unescape_url_keep2f(char *url) +{ + register int badesc, badpath; + char *x, *y; + + badesc = 0; + badpath = 0; + /* Initial scan for first '%'. Don't bother writing values before + * seeing a '%' */ + y = strchr(url, '%'); + if (y == NULL) { + return OK; + } + for (x = y; *y; ++x, ++y) { + if (*y != '%') { + *x = *y; + } + else { + if (!apr_isxdigit(*(y + 1)) || !apr_isxdigit(*(y + 2))) { + badesc = 1; + *x = '%'; + } + else { + char decoded; + decoded = x2c(y + 1); + if (decoded == '\0') { + badpath = 1; + } + else { + *x = decoded; + y += 2; + } + } + } + } + *x = '\0'; + if (badesc) { + return HTTP_BAD_REQUEST; + } + else if (badpath) { + return HTTP_NOT_FOUND; + } + else { + return OK; + } +} + +AP_DECLARE(char *) ap_construct_server(apr_pool_t *p, const char *hostname, + apr_port_t port, const request_rec *r) +{ + if (ap_is_default_port(port, r)) { + return apr_pstrdup(p, hostname); + } + else { + return apr_psprintf(p, "%s:%u", hostname, port); + } +} + +/* c2x takes an unsigned, and expects the caller has guaranteed that + * 0 <= what < 256... which usually means that you have to cast to + * unsigned char first, because (unsigned)(char)(x) first goes through + * signed extension to an int before the unsigned cast. + * + * The reason for this assumption is to assist gcc code generation -- + * the unsigned char -> unsigned extension is already done earlier in + * both uses of this code, so there's no need to waste time doing it + * again. + */ +static const char c2x_table[] = "0123456789abcdef"; + +static APR_INLINE unsigned char *c2x(unsigned what, unsigned char *where) +{ +#if APR_CHARSET_EBCDIC + what = apr_xlate_conv_byte(ap_hdrs_to_ascii, (unsigned char)what); +#endif /*APR_CHARSET_EBCDIC*/ + *where++ = '%'; + *where++ = c2x_table[what >> 4]; + *where++ = c2x_table[what & 0xf]; + return where; +} + +/* + * escape_path_segment() escapes a path segment, as defined in RFC 1808. This + * routine is (should be) OS independent. + * + * os_escape_path() converts an OS path to a URL, in an OS dependent way. In all + * cases if a ':' occurs before the first '/' in the URL, the URL should be + * prefixed with "./" (or the ':' escaped). In the case of Unix, this means + * leaving '/' alone, but otherwise doing what escape_path_segment() does. For + * efficiency reasons, we don't use escape_path_segment(), which is provided for + * reference. Again, RFC 1808 is where this stuff is defined. + * + * If partial is set, os_escape_path() assumes that the path will be appended to + * something with a '/' in it (and thus does not prefix "./"). + */ + +AP_DECLARE(char *) ap_escape_path_segment(apr_pool_t *p, const char *segment) +{ + char *copy = apr_palloc(p, 3 * strlen(segment) + 1); + const unsigned char *s = (const unsigned char *)segment; + unsigned char *d = (unsigned char *)copy; + unsigned c; + + while ((c = *s)) { + if (TEST_CHAR(c, T_ESCAPE_PATH_SEGMENT)) { + d = c2x(c, d); + } + else { + *d++ = c; + } + ++s; + } + *d = '\0'; + return copy; +} + +AP_DECLARE(char *) ap_os_escape_path(apr_pool_t *p, const char *path, int partial) +{ + char *copy = apr_palloc(p, 3 * strlen(path) + 3); + const unsigned char *s = (const unsigned char *)path; + unsigned char *d = (unsigned char *)copy; + unsigned c; + + if (!partial) { + const char *colon = ap_strchr_c(path, ':'); + const char *slash = ap_strchr_c(path, '/'); + + if (colon && (!slash || colon < slash)) { + *d++ = '.'; + *d++ = '/'; + } + } + while ((c = *s)) { + if (TEST_CHAR(c, T_OS_ESCAPE_PATH)) { + d = c2x(c, d); + } + else { + *d++ = c; + } + ++s; + } + *d = '\0'; + return copy; +} + +/* ap_escape_uri is now a macro for os_escape_path */ + +AP_DECLARE(char *) ap_escape_html(apr_pool_t *p, const char *s) +{ + int i, j; + char *x; + + /* first, count the number of extra characters */ + for (i = 0, j = 0; s[i] != '\0'; i++) + if (s[i] == '<' || s[i] == '>') + j += 3; + else if (s[i] == '&') + j += 4; + else if (s[i] == '"') + j += 5; + + if (j == 0) + return apr_pstrmemdup(p, s, i); + + x = apr_palloc(p, i + j + 1); + for (i = 0, j = 0; s[i] != '\0'; i++, j++) + if (s[i] == '<') { + memcpy(&x[j], "<", 4); + j += 3; + } + else if (s[i] == '>') { + memcpy(&x[j], ">", 4); + j += 3; + } + else if (s[i] == '&') { + memcpy(&x[j], "&", 5); + j += 4; + } + else if (s[i] == '"') { + memcpy(&x[j], """, 6); + j += 5; + } + else + x[j] = s[i]; + + x[j] = '\0'; + return x; +} + +AP_DECLARE(char *) ap_escape_logitem(apr_pool_t *p, const char *str) +{ + char *ret; + unsigned char *d; + const unsigned char *s; + + if (!str) { + return NULL; + } + + ret = apr_palloc(p, 4 * strlen(str) + 1); /* Be safe */ + d = (unsigned char *)ret; + s = (const unsigned char *)str; + for (; *s; ++s) { + + if (TEST_CHAR(*s, T_ESCAPE_LOGITEM)) { + *d++ = '\\'; + switch(*s) { + case '\b': + *d++ = 'b'; + break; + case '\n': + *d++ = 'n'; + break; + case '\r': + *d++ = 'r'; + break; + case '\t': + *d++ = 't'; + break; + case '\v': + *d++ = 'v'; + break; + case '\\': + case '"': + *d++ = *s; + break; + default: + c2x(*s, d); + *d = 'x'; + d += 3; + } + } + else { + *d++ = *s; + } + } + *d = '\0'; + + return ret; +} + +AP_DECLARE(apr_size_t) ap_escape_errorlog_item(char *dest, const char *source, + apr_size_t buflen) +{ + unsigned char *d, *ep; + const unsigned char *s; + + if (!source || !buflen) { /* be safe */ + return 0; + } + + d = (unsigned char *)dest; + s = (const unsigned char *)source; + ep = d + buflen - 1; + + for (; d < ep && *s; ++s) { + + if (TEST_CHAR(*s, T_ESCAPE_LOGITEM)) { + *d++ = '\\'; + if (d >= ep) { + --d; + break; + } + + switch(*s) { + case '\b': + *d++ = 'b'; + break; + case '\n': + *d++ = 'n'; + break; + case '\r': + *d++ = 'r'; + break; + case '\t': + *d++ = 't'; + break; + case '\v': + *d++ = 'v'; + break; + case '\\': + *d++ = *s; + break; + case '"': /* no need for this in error log */ + d[-1] = *s; + break; + default: + if (d >= ep - 2) { + ep = --d; /* break the for loop as well */ + break; + } + c2x(*s, d); + *d = 'x'; + d += 3; + } + } + else { + *d++ = *s; + } + } + *d = '\0'; + + return (d - (unsigned char *)dest); +} + +AP_DECLARE(int) ap_is_directory(apr_pool_t *p, const char *path) +{ + apr_finfo_t finfo; + + if (apr_stat(&finfo, path, APR_FINFO_TYPE, p) != APR_SUCCESS) + return 0; /* in error condition, just return no */ + + return (finfo.filetype == APR_DIR); +} + +AP_DECLARE(int) ap_is_rdirectory(apr_pool_t *p, const char *path) +{ + apr_finfo_t finfo; + + if (apr_lstat(&finfo, path, APR_FINFO_TYPE, p) != APR_SUCCESS) + return 0; /* in error condition, just return no */ + + return (finfo.filetype == APR_DIR); +} + +AP_DECLARE(char *) ap_make_full_path(apr_pool_t *a, const char *src1, + const char *src2) +{ + apr_size_t len1, len2; + char *path; + + len1 = strlen(src1); + len2 = strlen(src2); + /* allocate +3 for '/' delimiter, trailing NULL and overallocate + * one extra byte to allow the caller to add a trailing '/' + */ + path = (char *)apr_palloc(a, len1 + len2 + 3); + if (len1 == 0) { + *path = '/'; + memcpy(path + 1, src2, len2 + 1); + } + else { + char *next; + memcpy(path, src1, len1); + next = path + len1; + if (next[-1] != '/') { + *next++ = '/'; + } + memcpy(next, src2, len2 + 1); + } + return path; +} + +/* + * Check for an absoluteURI syntax (see section 3.2 in RFC2068). + */ +AP_DECLARE(int) ap_is_url(const char *u) +{ + register int x; + + for (x = 0; u[x] != ':'; x++) { + if ((!u[x]) || + ((!apr_isalpha(u[x])) && (!apr_isdigit(u[x])) && + (u[x] != '+') && (u[x] != '-') && (u[x] != '.'))) { + return 0; + } + } + + return (x ? 1 : 0); /* If the first character is ':', it's broken, too */ +} + +AP_DECLARE(int) ap_ind(const char *s, char c) +{ + const char *p = ap_strchr_c(s, c); + + if (p == NULL) + return -1; + return p - s; +} + +AP_DECLARE(int) ap_rind(const char *s, char c) +{ + const char *p = ap_strrchr_c(s, c); + + if (p == NULL) + return -1; + return p - s; +} + +AP_DECLARE(void) ap_str_tolower(char *str) +{ + while (*str) { + *str = apr_tolower(*str); + ++str; + } +} + +static char *find_fqdn(apr_pool_t *a, struct hostent *p) +{ + int x; + + if (!strchr(p->h_name, '.')) { + if (p->h_aliases) { + for (x = 0; p->h_aliases[x]; ++x) { + if (strchr(p->h_aliases[x], '.') && + (!strncasecmp(p->h_aliases[x], p->h_name, + strlen(p->h_name)))) + return apr_pstrdup(a, p->h_aliases[x]); + } + } + return NULL; + } + return apr_pstrdup(a, (void *) p->h_name); +} + +char *ap_get_local_host(apr_pool_t *a) +{ +#ifndef MAXHOSTNAMELEN +#define MAXHOSTNAMELEN 256 +#endif + char str[MAXHOSTNAMELEN + 1]; + char *server_hostname = NULL; + struct hostent *p; + +#ifdef BEOS_R5 + if (gethostname(str, sizeof(str) - 1) == 0) +#else + if (gethostname(str, sizeof(str) - 1) != 0) +#endif + { + ap_log_perror(APLOG_MARK, APLOG_STARTUP | APLOG_WARNING, 0, a, + "%s: gethostname() failed to determine ServerName", + ap_server_argv0); + } + else + { + str[sizeof(str) - 1] = '\0'; + /* TODO: Screaming for APR-ization */ + if ((!(p = gethostbyname(str))) + || (!(server_hostname = find_fqdn(a, p)))) { + /* Recovery - return the default servername by IP: */ + if (p && p->h_addr_list[0]) { + apr_snprintf(str, sizeof(str), "%pA", p->h_addr_list[0]); + server_hostname = apr_pstrdup(a, str); + /* We will drop through to report the IP-named server */ + } + } + else { + /* Since we found a fdqn, return it with no logged message. */ + return server_hostname; + } + } + + if (!server_hostname) + server_hostname = apr_pstrdup(a, "127.0.0.1"); + + ap_log_perror(APLOG_MARK, APLOG_ALERT|APLOG_STARTUP, 0, a, + "%s: Could not determine the server's fully qualified " + "domain name, using %s for ServerName", + ap_server_argv0, server_hostname); + + return server_hostname; +} + +/* simple 'pool' alloc()ing glue to apr_base64.c + */ +AP_DECLARE(char *) ap_pbase64decode(apr_pool_t *p, const char *bufcoded) +{ + char *decoded; + int l; + + decoded = (char *) apr_palloc(p, 1 + apr_base64_decode_len(bufcoded)); + l = apr_base64_decode(decoded, bufcoded); + decoded[l] = '\0'; /* make binary sequence into string */ + + return decoded; +} + +AP_DECLARE(char *) ap_pbase64encode(apr_pool_t *p, char *string) +{ + char *encoded; + int l = strlen(string); + + encoded = (char *) apr_palloc(p, 1 + apr_base64_encode_len(l)); + l = apr_base64_encode(encoded, string, l); + encoded[l] = '\0'; /* make binary sequence into string */ + + return encoded; +} + +/* we want to downcase the type/subtype for comparison purposes + * but nothing else because ;parameter=foo values are case sensitive. + * XXX: in truth we want to downcase parameter names... but really, + * apache has never handled parameters and such correctly. You + * also need to compress spaces and such to be able to compare + * properly. -djg + */ +AP_DECLARE(void) ap_content_type_tolower(char *str) +{ + char *semi; + + semi = strchr(str, ';'); + if (semi) { + *semi = '\0'; + } + while (*str) { + *str = apr_tolower(*str); + ++str; + } + if (semi) { + *semi = ';'; + } +} + +/* + * Given a string, replace any bare " with \" . + */ +AP_DECLARE(char *) ap_escape_quotes(apr_pool_t *p, const char *instring) +{ + int newlen = 0; + const char *inchr = instring; + char *outchr, *outstring; + + /* + * Look through the input string, jogging the length of the output + * string up by an extra byte each time we find an unescaped ". + */ + while (*inchr != '\0') { + newlen++; + if (*inchr == '"') { + newlen++; + } + /* + * If we find a slosh, and it's not the last byte in the string, + * it's escaping something - advance past both bytes. + */ + if ((*inchr == '\\') && (inchr[1] != '\0')) { + inchr++; + newlen++; + } + inchr++; + } + outstring = apr_palloc(p, newlen + 1); + inchr = instring; + outchr = outstring; + /* + * Now copy the input string to the output string, inserting a slosh + * in front of every " that doesn't already have one. + */ + while (*inchr != '\0') { + if ((*inchr == '\\') && (inchr[1] != '\0')) { + *outchr++ = *inchr++; + *outchr++ = *inchr++; + } + if (*inchr == '"') { + *outchr++ = '\\'; + } + if (*inchr != '\0') { + *outchr++ = *inchr++; + } + } + *outchr = '\0'; + return outstring; +} |