/* 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 #endif #if APR_HAVE_NETDB_H #include /* for gethostbyname() */ #endif #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 #endif #ifdef HAVE_GRP_H #include #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-2.1 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 the POSIX-esque ap_regcomp(). * Note that we return ap_regex_t instead of being passed one. * The reason is that if you use an already-used ap_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) { ap_regfree((ap_regex_t *) preg); return APR_SUCCESS; } AP_DECLARE(ap_regex_t *) ap_pregcomp(apr_pool_t *p, const char *pattern, int cflags) { ap_regex_t *preg = apr_palloc(p, sizeof *preg); if (ap_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, ap_regex_t *reg) { ap_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; } /* 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 ap_regex_t. * * input should be the string with the $-expressions, source should be the * string that was matched against. * * It returns the substituted string, or NULL on error. * * Parts of this code are based on Henry Spencer's regsub(), from his * AT&T V8 regexp package. */ AP_DECLARE(char *) ap_pregsub(apr_pool_t *p, const char *input, const char *source, size_t nmatch, ap_regmatch_t pmatch[]) { const char *src = input; char *dest, *dst; char c; size_t no; int len; if (!source) return NULL; if (!nmatch) return apr_pstrdup(p, src); /* First pass, find the size */ len = 0; while ((c = *src++) != '\0') { if (c == '$' && apr_isdigit(*src)) no = *src++ - '0'; else no = 10; if (no > 9) { /* Ordinary character. */ if (c == '\\' && *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_pstrmemdup(p, s, l); 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 = apr_pstrmemdup(atrans, *line, len); 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 = apr_pstrmemdup(atrans, *line, len); 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[1] == '\\')) { 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) { 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_filepath_name_get(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, leaving reserved characters intact. * Returns 0 on success, non-zero on error * Failure is due to * bad % escape returns HTTP_BAD_REQUEST * * decoding %00 or a forbidden character returns HTTP_NOT_FOUND */ static int unescape_url(char *url, const char *forbid, const char *reserved) { 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') || (forbid && ap_strchr_c(forbid, decoded))) { badpath = 1; *x = decoded; y += 2; } else if (reserved && ap_strchr_c(reserved, decoded)) { *x++ = *y++; *x++ = *y++; *x = *y; } 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(int) ap_unescape_url(char *url) { /* Traditional */ #ifdef CASE_BLIND_FILESYSTEM return unescape_url(url, "/\\", NULL); #else return unescape_url(url, "/", NULL); #endif } AP_DECLARE(int) ap_unescape_url_keep2f(char *url) { /* AllowEncodedSlashes (corrected) */ return unescape_url(url, NULL, "/"); } #ifdef NEW_APIS /* IFDEF these out until they've been thought through. * Just a germ of an API extension for now */ AP_DECLARE(int) ap_unescape_url_proxy(char *url) { /* leave RFC1738 reserved characters intact, * so proxied URLs * don't get mangled. Where does that leave encoded '&' ? */ return unescape_url(url, NULL, "/;?"); } AP_DECLARE(int) ap_unescape_url_reserved(char *url, const char *reserved) { return unescape_url(url, NULL, reserved); } #endif 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); } } AP_DECLARE(int) ap_unescape_all(char *url) { return unescape_url(url, NULL, NULL); } /* 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 prefix, unsigned char *where) { #if APR_CHARSET_EBCDIC what = apr_xlate_conv_byte(ap_hdrs_to_ascii, (unsigned char)what); #endif /*APR_CHARSET_EBCDIC*/ *where++ = prefix; *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_buffer(char *copy, const char *segment) { 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_escape_path_segment(apr_pool_t *p, const char *segment) { return ap_escape_path_segment_buffer(apr_palloc(p, 3 * strlen(segment) + 1), segment); } 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_html2(apr_pool_t *p, const char *s, int toasc) { 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; else if (toasc && !apr_isascii(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 if (toasc && !apr_isascii(s[i])) { char *esc = apr_psprintf(p, "&#%3.3d;", (unsigned char)s[i]); memcpy(&x[j], esc, 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, 'x', d); 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, 'x', d); 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_stat(&finfo, path, APR_FINFO_LINK | 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; } } /* * We must return a FQDN */ char *ap_get_local_host(apr_pool_t *a) { #ifndef MAXHOSTNAMELEN #define MAXHOSTNAMELEN 256 #endif char str[MAXHOSTNAMELEN + 1]; char *server_hostname = NULL; apr_sockaddr_t *sockaddr; char *hostname; if (apr_gethostname(str, sizeof(str) - 1, a) != APR_SUCCESS) { ap_log_perror(APLOG_MARK, APLOG_STARTUP | APLOG_WARNING, 0, a, "%s: apr_gethostname() failed to determine ServerName", ap_server_argv0); } else { str[sizeof(str) - 1] = '\0'; if (apr_sockaddr_info_get(&sockaddr, str, APR_UNSPEC, 0, 0, a) == APR_SUCCESS) { if ( (apr_getnameinfo(&hostname, sockaddr, 0) == APR_SUCCESS) && (ap_strchr_c(hostname, '.')) ) { server_hostname = apr_pstrdup(a, hostname); return server_hostname; } else if (ap_strchr_c(str, '.')) { server_hostname = apr_pstrdup(a, str); } else { apr_sockaddr_ip_get(&hostname, sockaddr); server_hostname = apr_pstrdup(a, hostname); } } else { ap_log_perror(APLOG_MARK, APLOG_STARTUP | APLOG_WARNING, 0, a, "%s: apr_sockaddr_info_get() failed for %s", ap_server_argv0, str); } } 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 reliably 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'; } ap_str_tolower(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; } /* * Given a string, append the PID deliminated by delim. * Usually used to create a pid-appended filepath name * (eg: /a/b/foo -> /a/b/foo.6726). A function, and not * a macro, to avoid unistd.h dependency */ AP_DECLARE(char *) ap_append_pid(apr_pool_t *p, const char *string, const char *delim) { return apr_psprintf(p, "%s%s%" APR_PID_T_FMT, string, delim, getpid()); } /** * Parse a given timeout parameter string into an apr_interval_time_t value. * The unit of the time interval is given as postfix string to the numeric * string. Currently the following units are understood: * * ms : milliseconds * s : seconds * mi[n] : minutes * h : hours * * If no unit is contained in the given timeout parameter the default_time_unit * will be used instead. * @param timeout_parameter The string containing the timeout parameter. * @param timeout The timeout value to be returned. * @param default_time_unit The default time unit to use if none is specified * in timeout_parameter. * @return Status value indicating whether the parsing was successful or not. */ AP_DECLARE(apr_status_t) ap_timeout_parameter_parse( const char *timeout_parameter, apr_interval_time_t *timeout, const char *default_time_unit) { char *endp; const char *time_str; apr_int64_t tout; tout = apr_strtoi64(timeout_parameter, &endp, 10); if (errno) { return errno; } if (!endp || !*endp) { time_str = default_time_unit; } else { time_str = endp; } switch (*time_str) { /* Time is in seconds */ case 's': *timeout = (apr_interval_time_t) apr_time_from_sec(tout); break; case 'h': /* Time is in hours */ *timeout = (apr_interval_time_t) apr_time_from_sec(tout * 3600); break; case 'm': switch (*(++time_str)) { /* Time is in milliseconds */ case 's': *timeout = (apr_interval_time_t) tout * 1000; break; /* Time is in minutes */ case 'i': *timeout = (apr_interval_time_t) apr_time_from_sec(tout * 60); break; default: return APR_EGENERAL; } break; default: return APR_EGENERAL; } return APR_SUCCESS; }