| /* 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. |
| */ |
| |
| /* |
| * apr_uri.c: URI related utility things |
| * |
| */ |
| |
| #include <stdlib.h> |
| |
| #include "apu.h" |
| #include "apr.h" |
| #include "apr_general.h" |
| #include "apr_strings.h" |
| |
| #define APR_WANT_STRFUNC |
| #include "apr_want.h" |
| |
| #include "apr_uri.h" |
| |
| typedef struct schemes_t schemes_t; |
| |
| /** Structure to store various schemes and their default ports */ |
| struct schemes_t { |
| /** The name of the scheme */ |
| const char *name; |
| /** The default port for the scheme */ |
| apr_port_t default_port; |
| }; |
| |
| /* Some WWW schemes and their default ports; this is basically /etc/services */ |
| /* This will become global when the protocol abstraction comes */ |
| /* As the schemes are searched by a linear search, */ |
| /* they are sorted by their expected frequency */ |
| static schemes_t schemes[] = |
| { |
| {"http", APR_URI_HTTP_DEFAULT_PORT}, |
| {"ftp", APR_URI_FTP_DEFAULT_PORT}, |
| {"https", APR_URI_HTTPS_DEFAULT_PORT}, |
| {"gopher", APR_URI_GOPHER_DEFAULT_PORT}, |
| {"ldap", APR_URI_LDAP_DEFAULT_PORT}, |
| {"nntp", APR_URI_NNTP_DEFAULT_PORT}, |
| {"snews", APR_URI_SNEWS_DEFAULT_PORT}, |
| {"imap", APR_URI_IMAP_DEFAULT_PORT}, |
| {"pop", APR_URI_POP_DEFAULT_PORT}, |
| {"sip", APR_URI_SIP_DEFAULT_PORT}, |
| {"rtsp", APR_URI_RTSP_DEFAULT_PORT}, |
| {"wais", APR_URI_WAIS_DEFAULT_PORT}, |
| {"z39.50r", APR_URI_WAIS_DEFAULT_PORT}, |
| {"z39.50s", APR_URI_WAIS_DEFAULT_PORT}, |
| {"prospero", APR_URI_PROSPERO_DEFAULT_PORT}, |
| {"nfs", APR_URI_NFS_DEFAULT_PORT}, |
| {"tip", APR_URI_TIP_DEFAULT_PORT}, |
| {"acap", APR_URI_ACAP_DEFAULT_PORT}, |
| {"telnet", APR_URI_TELNET_DEFAULT_PORT}, |
| {"ssh", APR_URI_SSH_DEFAULT_PORT}, |
| { NULL, 0xFFFF } /* unknown port */ |
| }; |
| |
| APU_DECLARE(apr_port_t) apr_uri_port_of_scheme(const char *scheme_str) |
| { |
| schemes_t *scheme; |
| |
| if (scheme_str) { |
| for (scheme = schemes; scheme->name != NULL; ++scheme) { |
| if (strcasecmp(scheme_str, scheme->name) == 0) { |
| return scheme->default_port; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| /* Unparse a apr_uri_t structure to an URI string. |
| * Optionally suppress the password for security reasons. |
| */ |
| APU_DECLARE(char *) apr_uri_unparse(apr_pool_t *p, |
| const apr_uri_t *uptr, |
| unsigned flags) |
| { |
| char *ret = ""; |
| |
| /* If suppressing the site part, omit both user name & scheme://hostname */ |
| if (!(flags & APR_URI_UNP_OMITSITEPART)) { |
| |
| /* Construct a "user:password@" string, honoring the passed |
| * APR_URI_UNP_ flags: */ |
| if (uptr->user || uptr->password) { |
| ret = apr_pstrcat(p, |
| (uptr->user && !(flags & APR_URI_UNP_OMITUSER)) |
| ? uptr->user : "", |
| (uptr->password && !(flags & APR_URI_UNP_OMITPASSWORD)) |
| ? ":" : "", |
| (uptr->password && !(flags & APR_URI_UNP_OMITPASSWORD)) |
| ? ((flags & APR_URI_UNP_REVEALPASSWORD) |
| ? uptr->password : "XXXXXXXX") |
| : "", |
| ((uptr->user && !(flags & APR_URI_UNP_OMITUSER)) || |
| (uptr->password && !(flags & APR_URI_UNP_OMITPASSWORD))) |
| ? "@" : "", |
| NULL); |
| } |
| |
| /* Construct scheme://site string */ |
| if (uptr->hostname) { |
| int is_default_port; |
| const char *lbrk = "", *rbrk = ""; |
| |
| if (strchr(uptr->hostname, ':')) { /* v6 literal */ |
| lbrk = "["; |
| rbrk = "]"; |
| } |
| |
| is_default_port = |
| (uptr->port_str == NULL || |
| uptr->port == 0 || |
| uptr->port == apr_uri_port_of_scheme(uptr->scheme)); |
| |
| ret = apr_pstrcat(p, "//", ret, lbrk, uptr->hostname, rbrk, |
| is_default_port ? "" : ":", |
| is_default_port ? "" : uptr->port_str, |
| NULL); |
| } |
| if (uptr->scheme) { |
| ret = apr_pstrcat(p, uptr->scheme, ":", ret, NULL); |
| } |
| } |
| |
| /* Should we suppress all path info? */ |
| if (!(flags & APR_URI_UNP_OMITPATHINFO)) { |
| /* Append path, query and fragment strings: */ |
| ret = apr_pstrcat(p, |
| ret, |
| (uptr->path) |
| ? uptr->path : "", |
| (uptr->query && !(flags & APR_URI_UNP_OMITQUERY)) |
| ? "?" : "", |
| (uptr->query && !(flags & APR_URI_UNP_OMITQUERY)) |
| ? uptr->query : "", |
| (uptr->fragment && !(flags & APR_URI_UNP_OMITQUERY)) |
| ? "#" : NULL, |
| (uptr->fragment && !(flags & APR_URI_UNP_OMITQUERY)) |
| ? uptr->fragment : NULL, |
| NULL); |
| } |
| return ret; |
| } |
| |
| /* Here is the hand-optimized parse_uri_components(). There are some wild |
| * tricks we could pull in assembly language that we don't pull here... like we |
| * can do word-at-time scans for delimiter characters using the same technique |
| * that fast memchr()s use. But that would be way non-portable. -djg |
| */ |
| |
| /* We have a apr_table_t that we can index by character and it tells us if the |
| * character is one of the interesting delimiters. Note that we even get |
| * compares for NUL for free -- it's just another delimiter. |
| */ |
| |
| #define T_COLON 0x01 /* ':' */ |
| #define T_SLASH 0x02 /* '/' */ |
| #define T_QUESTION 0x04 /* '?' */ |
| #define T_HASH 0x08 /* '#' */ |
| #define T_NUL 0x80 /* '\0' */ |
| |
| #if APR_CHARSET_EBCDIC |
| /* Delimiter table for the EBCDIC character set */ |
| static const unsigned char uri_delims[256] = { |
| T_NUL,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,T_SLASH,0,0,0,0,0,0,0,0,0,0,0,0,0,T_QUESTION, |
| 0,0,0,0,0,0,0,0,0,0,T_COLON,T_HASH,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |
| }; |
| #else |
| /* Delimiter table for the ASCII character set */ |
| static const unsigned char uri_delims[256] = { |
| T_NUL,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,T_HASH,0,0,0,0,0,0,0,0,0,0,0,T_SLASH, |
| 0,0,0,0,0,0,0,0,0,0,T_COLON,0,0,0,0,T_QUESTION, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |
| }; |
| #endif |
| |
| |
| /* it works like this: |
| if (uri_delims[ch] & NOTEND_foobar) { |
| then we're not at a delimiter for foobar |
| } |
| */ |
| |
| /* Note that we optimize the scheme scanning here, we cheat and let the |
| * compiler know that it doesn't have to do the & masking. |
| */ |
| #define NOTEND_SCHEME (0xff) |
| #define NOTEND_HOSTINFO (T_SLASH | T_QUESTION | T_HASH | T_NUL) |
| #define NOTEND_PATH (T_QUESTION | T_HASH | T_NUL) |
| |
| /* parse_uri_components(): |
| * Parse a given URI, fill in all supplied fields of a uri_components |
| * structure. This eliminates the necessity of extracting host, port, |
| * path, query info repeatedly in the modules. |
| * Side effects: |
| * - fills in fields of uri_components *uptr |
| * - none on any of the r->* fields |
| */ |
| APU_DECLARE(apr_status_t) apr_uri_parse(apr_pool_t *p, const char *uri, |
| apr_uri_t *uptr) |
| { |
| const char *s; |
| const char *s1; |
| const char *hostinfo; |
| char *endstr; |
| int port; |
| int v6_offset1 = 0, v6_offset2 = 0; |
| |
| /* Initialize the structure. parse_uri() and parse_uri_components() |
| * can be called more than once per request. |
| */ |
| memset (uptr, '\0', sizeof(*uptr)); |
| uptr->is_initialized = 1; |
| |
| /* We assume the processor has a branch predictor like most -- |
| * it assumes forward branches are untaken and backwards are taken. That's |
| * the reason for the gotos. -djg |
| */ |
| if (uri[0] == '/') { |
| /* RFC2396 #4.3 says that two leading slashes mean we have an |
| * authority component, not a path! Fixing this looks scary |
| * with the gotos here. But if the existing logic is valid, |
| * then presumably a goto pointing to deal_with_authority works. |
| * |
| * RFC2396 describes this as resolving an ambiguity. In the |
| * case of three or more slashes there would seem to be no |
| * ambiguity, so it is a path after all. |
| */ |
| if (uri[1] == '/' && uri[2] != '/') { |
| s = uri + 2 ; |
| goto deal_with_authority ; |
| } |
| |
| deal_with_path: |
| /* we expect uri to point to first character of path ... remember |
| * that the path could be empty -- http://foobar?query for example |
| */ |
| s = uri; |
| while ((uri_delims[*(unsigned char *)s] & NOTEND_PATH) == 0) { |
| ++s; |
| } |
| if (s != uri) { |
| uptr->path = apr_pstrmemdup(p, uri, s - uri); |
| } |
| if (*s == 0) { |
| return APR_SUCCESS; |
| } |
| if (*s == '?') { |
| ++s; |
| s1 = strchr(s, '#'); |
| if (s1) { |
| uptr->fragment = apr_pstrdup(p, s1 + 1); |
| uptr->query = apr_pstrmemdup(p, s, s1 - s); |
| } |
| else { |
| uptr->query = apr_pstrdup(p, s); |
| } |
| return APR_SUCCESS; |
| } |
| /* otherwise it's a fragment */ |
| uptr->fragment = apr_pstrdup(p, s + 1); |
| return APR_SUCCESS; |
| } |
| |
| /* find the scheme: */ |
| s = uri; |
| while ((uri_delims[*(unsigned char *)s] & NOTEND_SCHEME) == 0) { |
| ++s; |
| } |
| /* scheme must be non-empty and followed by : */ |
| if (s == uri || s[0] != ':') { |
| goto deal_with_path; /* backwards predicted taken! */ |
| } |
| |
| uptr->scheme = apr_pstrmemdup(p, uri, s - uri); |
| if (s[1] != '/' || s[2] != '/') { |
| uri = s + 1; |
| goto deal_with_path; |
| } |
| |
| s += 3; |
| |
| deal_with_authority: |
| hostinfo = s; |
| while ((uri_delims[*(unsigned char *)s] & NOTEND_HOSTINFO) == 0) { |
| ++s; |
| } |
| uri = s; /* whatever follows hostinfo is start of uri */ |
| uptr->hostinfo = apr_pstrmemdup(p, hostinfo, uri - hostinfo); |
| |
| /* If there's a username:password@host:port, the @ we want is the last @... |
| * too bad there's no memrchr()... For the C purists, note that hostinfo |
| * is definately not the first character of the original uri so therefore |
| * &hostinfo[-1] < &hostinfo[0] ... and this loop is valid C. |
| */ |
| do { |
| --s; |
| } while (s >= hostinfo && *s != '@'); |
| if (s < hostinfo) { |
| /* again we want the common case to be fall through */ |
| deal_with_host: |
| /* We expect hostinfo to point to the first character of |
| * the hostname. If there's a port it is the first colon, |
| * except with IPv6. |
| */ |
| if (*hostinfo == '[') { |
| v6_offset1 = 1; |
| v6_offset2 = 2; |
| s = memchr(hostinfo, ']', uri - hostinfo); |
| if (s == NULL) { |
| return APR_EGENERAL; |
| } |
| if (*++s != ':') { |
| s = NULL; /* no port */ |
| } |
| } |
| else { |
| s = memchr(hostinfo, ':', uri - hostinfo); |
| } |
| if (s == NULL) { |
| /* we expect the common case to have no port */ |
| uptr->hostname = apr_pstrmemdup(p, |
| hostinfo + v6_offset1, |
| uri - hostinfo - v6_offset2); |
| goto deal_with_path; |
| } |
| uptr->hostname = apr_pstrmemdup(p, |
| hostinfo + v6_offset1, |
| s - hostinfo - v6_offset2); |
| ++s; |
| uptr->port_str = apr_pstrmemdup(p, s, uri - s); |
| if (uri != s) { |
| port = strtol(uptr->port_str, &endstr, 10); |
| uptr->port = port; |
| if (*endstr == '\0') { |
| goto deal_with_path; |
| } |
| /* Invalid characters after ':' found */ |
| return APR_EGENERAL; |
| } |
| uptr->port = apr_uri_port_of_scheme(uptr->scheme); |
| goto deal_with_path; |
| } |
| |
| /* first colon delimits username:password */ |
| s1 = memchr(hostinfo, ':', s - hostinfo); |
| if (s1) { |
| uptr->user = apr_pstrmemdup(p, hostinfo, s1 - hostinfo); |
| ++s1; |
| uptr->password = apr_pstrmemdup(p, s1, s - s1); |
| } |
| else { |
| uptr->user = apr_pstrmemdup(p, hostinfo, s - hostinfo); |
| } |
| hostinfo = s + 1; |
| goto deal_with_host; |
| } |
| |
| /* Special case for CONNECT parsing: it comes with the hostinfo part only */ |
| /* See the INTERNET-DRAFT document "Tunneling SSL Through a WWW Proxy" |
| * currently at http://www.mcom.com/newsref/std/tunneling_ssl.html |
| * for the format of the "CONNECT host:port HTTP/1.0" request |
| */ |
| APU_DECLARE(apr_status_t) apr_uri_parse_hostinfo(apr_pool_t *p, |
| const char *hostinfo, |
| apr_uri_t *uptr) |
| { |
| const char *s; |
| char *endstr; |
| const char *rsb; |
| int v6_offset1 = 0; |
| |
| /* Initialize the structure. parse_uri() and parse_uri_components() |
| * can be called more than once per request. |
| */ |
| memset(uptr, '\0', sizeof(*uptr)); |
| uptr->is_initialized = 1; |
| uptr->hostinfo = apr_pstrdup(p, hostinfo); |
| |
| /* We expect hostinfo to point to the first character of |
| * the hostname. There must be a port, separated by a colon |
| */ |
| if (*hostinfo == '[') { |
| if ((rsb = strchr(hostinfo, ']')) == NULL || |
| *(rsb + 1) != ':') { |
| return APR_EGENERAL; |
| } |
| /* literal IPv6 address */ |
| s = rsb + 1; |
| ++hostinfo; |
| v6_offset1 = 1; |
| } |
| else { |
| s = strchr(hostinfo, ':'); |
| } |
| if (s == NULL) { |
| return APR_EGENERAL; |
| } |
| uptr->hostname = apr_pstrndup(p, hostinfo, s - hostinfo - v6_offset1); |
| ++s; |
| uptr->port_str = apr_pstrdup(p, s); |
| if (*s != '\0') { |
| uptr->port = (unsigned short) strtol(uptr->port_str, &endstr, 10); |
| if (*endstr == '\0') { |
| return APR_SUCCESS; |
| } |
| /* Invalid characters after ':' found */ |
| } |
| return APR_EGENERAL; |
| } |
