https://github.com/qemu/qemu
Tip revision: 62dbe54c24dbf77051bafe1039c31ddc8f37602d authored by Peter Maydell on 16 April 2024, 17:06:15 UTC
Update version for v9.0.0-rc4 release
Update version for v9.0.0-rc4 release
Tip revision: 62dbe54
uri.c
/**
* uri.c: set of generic URI related routines
*
* Reference: RFCs 3986, 2732 and 2373
*
* Copyright (C) 1998-2003 Daniel Veillard. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* DANIEL VEILLARD BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of Daniel Veillard shall not
* be used in advertising or otherwise to promote the sale, use or other
* dealings in this Software without prior written authorization from him.
*
* daniel@veillard.com
*
**
*
* Copyright (C) 2007, 2009-2010 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <https://www.gnu.org/licenses/>.
*
* Authors:
* Richard W.M. Jones <rjones@redhat.com>
*
*/
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qemu/uri.h"
static void uri_clean(URI *uri);
/*
* Old rule from 2396 used in legacy handling code
* alpha = lowalpha | upalpha
*/
#define IS_ALPHA(x) (IS_LOWALPHA(x) || IS_UPALPHA(x))
/*
* lowalpha = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" | "j" |
* "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" | "s" | "t" |
* "u" | "v" | "w" | "x" | "y" | "z"
*/
#define IS_LOWALPHA(x) (((x) >= 'a') && ((x) <= 'z'))
/*
* upalpha = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | "J" |
* "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" | "S" | "T" |
* "U" | "V" | "W" | "X" | "Y" | "Z"
*/
#define IS_UPALPHA(x) (((x) >= 'A') && ((x) <= 'Z'))
#ifdef IS_DIGIT
#undef IS_DIGIT
#endif
/*
* digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
*/
#define IS_DIGIT(x) (((x) >= '0') && ((x) <= '9'))
/*
* alphanum = alpha | digit
*/
#define IS_ALPHANUM(x) (IS_ALPHA(x) || IS_DIGIT(x))
/*
* mark = "-" | "_" | "." | "!" | "~" | "*" | "'" | "(" | ")"
*/
#define IS_MARK(x) (((x) == '-') || ((x) == '_') || ((x) == '.') || \
((x) == '!') || ((x) == '~') || ((x) == '*') || ((x) == '\'') || \
((x) == '(') || ((x) == ')'))
/*
* unwise = "{" | "}" | "|" | "\" | "^" | "`"
*/
#define IS_UNWISE(p) \
(((*(p) == '{')) || ((*(p) == '}')) || ((*(p) == '|')) || \
((*(p) == '\\')) || ((*(p) == '^')) || ((*(p) == '[')) || \
((*(p) == ']')) || ((*(p) == '`')))
/*
* reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" | "$" | "," |
* "[" | "]"
*/
#define IS_RESERVED(x) (((x) == ';') || ((x) == '/') || ((x) == '?') || \
((x) == ':') || ((x) == '@') || ((x) == '&') || ((x) == '=') || \
((x) == '+') || ((x) == '$') || ((x) == ',') || ((x) == '[') || \
((x) == ']'))
/*
* unreserved = alphanum | mark
*/
#define IS_UNRESERVED(x) (IS_ALPHANUM(x) || IS_MARK(x))
/*
* Skip to next pointer char, handle escaped sequences
*/
#define NEXT(p) ((*p == '%') ? p += 3 : p++)
/*
* Productions from the spec.
*
* authority = server | reg_name
* reg_name = 1*( unreserved | escaped | "$" | "," |
* ";" | ":" | "@" | "&" | "=" | "+" )
*
* path = [ abs_path | opaque_part ]
*/
/************************************************************************
* *
* RFC 3986 parser *
* *
************************************************************************/
#define ISA_DIGIT(p) ((*(p) >= '0') && (*(p) <= '9'))
#define ISA_ALPHA(p) (((*(p) >= 'a') && (*(p) <= 'z')) || \
((*(p) >= 'A') && (*(p) <= 'Z')))
#define ISA_HEXDIG(p) \
(ISA_DIGIT(p) || ((*(p) >= 'a') && (*(p) <= 'f')) || \
((*(p) >= 'A') && (*(p) <= 'F')))
/*
* sub-delims = "!" / "$" / "&" / "'" / "(" / ")"
* / "*" / "+" / "," / ";" / "="
*/
#define ISA_SUB_DELIM(p) \
(((*(p) == '!')) || ((*(p) == '$')) || ((*(p) == '&')) || \
((*(p) == '(')) || ((*(p) == ')')) || ((*(p) == '*')) || \
((*(p) == '+')) || ((*(p) == ',')) || ((*(p) == ';')) || \
((*(p) == '=')) || ((*(p) == '\'')))
/*
* unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
*/
#define ISA_UNRESERVED(p) \
((ISA_ALPHA(p)) || (ISA_DIGIT(p)) || ((*(p) == '-')) || \
((*(p) == '.')) || ((*(p) == '_')) || ((*(p) == '~')))
/*
* pct-encoded = "%" HEXDIG HEXDIG
*/
#define ISA_PCT_ENCODED(p) \
((*(p) == '%') && (ISA_HEXDIG(p + 1)) && (ISA_HEXDIG(p + 2)))
/*
* pchar = unreserved / pct-encoded / sub-delims / ":" / "@"
*/
#define ISA_PCHAR(p) \
(ISA_UNRESERVED(p) || ISA_PCT_ENCODED(p) || ISA_SUB_DELIM(p) || \
((*(p) == ':')) || ((*(p) == '@')))
/**
* rfc3986_parse_scheme:
* @uri: pointer to an URI structure
* @str: pointer to the string to analyze
*
* Parse an URI scheme
*
* ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
*
* Returns 0 or the error code
*/
static int rfc3986_parse_scheme(URI *uri, const char **str)
{
const char *cur;
if (str == NULL) {
return -1;
}
cur = *str;
if (!ISA_ALPHA(cur)) {
return 2;
}
cur++;
while (ISA_ALPHA(cur) || ISA_DIGIT(cur) || (*cur == '+') || (*cur == '-') ||
(*cur == '.')) {
cur++;
}
if (uri != NULL) {
g_free(uri->scheme);
uri->scheme = g_strndup(*str, cur - *str);
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_fragment:
* @uri: pointer to an URI structure
* @str: pointer to the string to analyze
*
* Parse the query part of an URI
*
* fragment = *( pchar / "/" / "?" )
* NOTE: the strict syntax as defined by 3986 does not allow '[' and ']'
* in the fragment identifier but this is used very broadly for
* xpointer scheme selection, so we are allowing it here to not break
* for example all the DocBook processing chains.
*
* Returns 0 or the error code
*/
static int rfc3986_parse_fragment(URI *uri, const char **str)
{
const char *cur;
if (str == NULL) {
return -1;
}
cur = *str;
while ((ISA_PCHAR(cur)) || (*cur == '/') || (*cur == '?') ||
(*cur == '[') || (*cur == ']') ||
((uri != NULL) && (uri->cleanup & 1) && (IS_UNWISE(cur)))) {
NEXT(cur);
}
if (uri != NULL) {
g_free(uri->fragment);
if (uri->cleanup & 2) {
uri->fragment = g_strndup(*str, cur - *str);
} else {
uri->fragment = g_uri_unescape_segment(*str, cur, NULL);
}
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_query:
* @uri: pointer to an URI structure
* @str: pointer to the string to analyze
*
* Parse the query part of an URI
*
* query = *uric
*
* Returns 0 or the error code
*/
static int rfc3986_parse_query(URI *uri, const char **str)
{
const char *cur;
if (str == NULL) {
return -1;
}
cur = *str;
while ((ISA_PCHAR(cur)) || (*cur == '/') || (*cur == '?') ||
((uri != NULL) && (uri->cleanup & 1) && (IS_UNWISE(cur)))) {
NEXT(cur);
}
if (uri != NULL) {
g_free(uri->query);
uri->query = g_strndup(*str, cur - *str);
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_port:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse a port part and fills in the appropriate fields
* of the @uri structure
*
* port = *DIGIT
*
* Returns 0 or the error code
*/
static int rfc3986_parse_port(URI *uri, const char **str)
{
const char *cur = *str;
int port = 0;
if (ISA_DIGIT(cur)) {
while (ISA_DIGIT(cur)) {
port = port * 10 + (*cur - '0');
if (port > 65535) {
return 1;
}
cur++;
}
if (uri) {
uri->port = port;
}
*str = cur;
return 0;
}
return 1;
}
/**
* rfc3986_parse_user_info:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse a user information part and fill in the appropriate fields
* of the @uri structure
*
* userinfo = *( unreserved / pct-encoded / sub-delims / ":" )
*
* Returns 0 or the error code
*/
static int rfc3986_parse_user_info(URI *uri, const char **str)
{
const char *cur;
cur = *str;
while (ISA_UNRESERVED(cur) || ISA_PCT_ENCODED(cur) || ISA_SUB_DELIM(cur) ||
(*cur == ':')) {
NEXT(cur);
}
if (*cur == '@') {
if (uri != NULL) {
g_free(uri->user);
if (uri->cleanup & 2) {
uri->user = g_strndup(*str, cur - *str);
} else {
uri->user = g_uri_unescape_segment(*str, cur, NULL);
}
}
*str = cur;
return 0;
}
return 1;
}
/**
* rfc3986_parse_dec_octet:
* @str: the string to analyze
*
* dec-octet = DIGIT ; 0-9
* / %x31-39 DIGIT ; 10-99
* / "1" 2DIGIT ; 100-199
* / "2" %x30-34 DIGIT ; 200-249
* / "25" %x30-35 ; 250-255
*
* Skip a dec-octet.
*
* Returns 0 if found and skipped, 1 otherwise
*/
static int rfc3986_parse_dec_octet(const char **str)
{
const char *cur = *str;
if (!(ISA_DIGIT(cur))) {
return 1;
}
if (!ISA_DIGIT(cur + 1)) {
cur++;
} else if ((*cur != '0') && (ISA_DIGIT(cur + 1)) && (!ISA_DIGIT(cur + 2))) {
cur += 2;
} else if ((*cur == '1') && (ISA_DIGIT(cur + 1)) && (ISA_DIGIT(cur + 2))) {
cur += 3;
} else if ((*cur == '2') && (*(cur + 1) >= '0') && (*(cur + 1) <= '4') &&
(ISA_DIGIT(cur + 2))) {
cur += 3;
} else if ((*cur == '2') && (*(cur + 1) == '5') && (*(cur + 2) >= '0') &&
(*(cur + 1) <= '5')) {
cur += 3;
} else {
return 1;
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_host:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an host part and fills in the appropriate fields
* of the @uri structure
*
* host = IP-literal / IPv4address / reg-name
* IP-literal = "[" ( IPv6address / IPvFuture ) "]"
* IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet
* reg-name = *( unreserved / pct-encoded / sub-delims )
*
* Returns 0 or the error code
*/
static int rfc3986_parse_host(URI *uri, const char **str)
{
const char *cur = *str;
const char *host;
host = cur;
/*
* IPv6 and future addressing scheme are enclosed between brackets
*/
if (*cur == '[') {
cur++;
while ((*cur != ']') && (*cur != 0)) {
cur++;
}
if (*cur != ']') {
return 1;
}
cur++;
goto found;
}
/*
* try to parse an IPv4
*/
if (ISA_DIGIT(cur)) {
if (rfc3986_parse_dec_octet(&cur) != 0) {
goto not_ipv4;
}
if (*cur != '.') {
goto not_ipv4;
}
cur++;
if (rfc3986_parse_dec_octet(&cur) != 0) {
goto not_ipv4;
}
if (*cur != '.') {
goto not_ipv4;
}
if (rfc3986_parse_dec_octet(&cur) != 0) {
goto not_ipv4;
}
if (*cur != '.') {
goto not_ipv4;
}
if (rfc3986_parse_dec_octet(&cur) != 0) {
goto not_ipv4;
}
goto found;
not_ipv4:
cur = *str;
}
/*
* then this should be a hostname which can be empty
*/
while (ISA_UNRESERVED(cur) || ISA_PCT_ENCODED(cur) || ISA_SUB_DELIM(cur)) {
NEXT(cur);
}
found:
if (uri != NULL) {
g_free(uri->authority);
uri->authority = NULL;
g_free(uri->server);
if (cur != host) {
if (uri->cleanup & 2) {
uri->server = g_strndup(host, cur - host);
} else {
uri->server = g_uri_unescape_segment(host, cur, NULL);
}
} else {
uri->server = NULL;
}
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_authority:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an authority part and fills in the appropriate fields
* of the @uri structure
*
* authority = [ userinfo "@" ] host [ ":" port ]
*
* Returns 0 or the error code
*/
static int rfc3986_parse_authority(URI *uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
/*
* try to parse a userinfo and check for the trailing @
*/
ret = rfc3986_parse_user_info(uri, &cur);
if ((ret != 0) || (*cur != '@')) {
cur = *str;
} else {
cur++;
}
ret = rfc3986_parse_host(uri, &cur);
if (ret != 0) {
return ret;
}
if (*cur == ':') {
cur++;
ret = rfc3986_parse_port(uri, &cur);
if (ret != 0) {
return ret;
}
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_segment:
* @str: the string to analyze
* @forbid: an optional forbidden character
* @empty: allow an empty segment
*
* Parse a segment and fills in the appropriate fields
* of the @uri structure
*
* segment = *pchar
* segment-nz = 1*pchar
* segment-nz-nc = 1*( unreserved / pct-encoded / sub-delims / "@" )
* ; non-zero-length segment without any colon ":"
*
* Returns 0 or the error code
*/
static int rfc3986_parse_segment(const char **str, char forbid, int empty)
{
const char *cur;
cur = *str;
if (!ISA_PCHAR(cur)) {
if (empty) {
return 0;
}
return 1;
}
while (ISA_PCHAR(cur) && (*cur != forbid)) {
NEXT(cur);
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_path_ab_empty:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an path absolute or empty and fills in the appropriate fields
* of the @uri structure
*
* path-abempty = *( "/" segment )
*
* Returns 0 or the error code
*/
static int rfc3986_parse_path_ab_empty(URI *uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
while (*cur == '/') {
cur++;
ret = rfc3986_parse_segment(&cur, 0, 1);
if (ret != 0) {
return ret;
}
}
if (uri != NULL) {
g_free(uri->path);
if (*str != cur) {
if (uri->cleanup & 2) {
uri->path = g_strndup(*str, cur - *str);
} else {
uri->path = g_uri_unescape_segment(*str, cur, NULL);
}
} else {
uri->path = NULL;
}
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_path_absolute:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an path absolute and fills in the appropriate fields
* of the @uri structure
*
* path-absolute = "/" [ segment-nz *( "/" segment ) ]
*
* Returns 0 or the error code
*/
static int rfc3986_parse_path_absolute(URI *uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
if (*cur != '/') {
return 1;
}
cur++;
ret = rfc3986_parse_segment(&cur, 0, 0);
if (ret == 0) {
while (*cur == '/') {
cur++;
ret = rfc3986_parse_segment(&cur, 0, 1);
if (ret != 0) {
return ret;
}
}
}
if (uri != NULL) {
g_free(uri->path);
if (cur != *str) {
if (uri->cleanup & 2) {
uri->path = g_strndup(*str, cur - *str);
} else {
uri->path = g_uri_unescape_segment(*str, cur, NULL);
}
} else {
uri->path = NULL;
}
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_path_rootless:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an path without root and fills in the appropriate fields
* of the @uri structure
*
* path-rootless = segment-nz *( "/" segment )
*
* Returns 0 or the error code
*/
static int rfc3986_parse_path_rootless(URI *uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
ret = rfc3986_parse_segment(&cur, 0, 0);
if (ret != 0) {
return ret;
}
while (*cur == '/') {
cur++;
ret = rfc3986_parse_segment(&cur, 0, 1);
if (ret != 0) {
return ret;
}
}
if (uri != NULL) {
g_free(uri->path);
if (cur != *str) {
if (uri->cleanup & 2) {
uri->path = g_strndup(*str, cur - *str);
} else {
uri->path = g_uri_unescape_segment(*str, cur, NULL);
}
} else {
uri->path = NULL;
}
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_path_no_scheme:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an path which is not a scheme and fills in the appropriate fields
* of the @uri structure
*
* path-noscheme = segment-nz-nc *( "/" segment )
*
* Returns 0 or the error code
*/
static int rfc3986_parse_path_no_scheme(URI *uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
ret = rfc3986_parse_segment(&cur, ':', 0);
if (ret != 0) {
return ret;
}
while (*cur == '/') {
cur++;
ret = rfc3986_parse_segment(&cur, 0, 1);
if (ret != 0) {
return ret;
}
}
if (uri != NULL) {
g_free(uri->path);
if (cur != *str) {
if (uri->cleanup & 2) {
uri->path = g_strndup(*str, cur - *str);
} else {
uri->path = g_uri_unescape_segment(*str, cur, NULL);
}
} else {
uri->path = NULL;
}
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_hier_part:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an hierarchical part and fills in the appropriate fields
* of the @uri structure
*
* hier-part = "//" authority path-abempty
* / path-absolute
* / path-rootless
* / path-empty
*
* Returns 0 or the error code
*/
static int rfc3986_parse_hier_part(URI *uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
if ((*cur == '/') && (*(cur + 1) == '/')) {
cur += 2;
ret = rfc3986_parse_authority(uri, &cur);
if (ret != 0) {
return ret;
}
ret = rfc3986_parse_path_ab_empty(uri, &cur);
if (ret != 0) {
return ret;
}
*str = cur;
return 0;
} else if (*cur == '/') {
ret = rfc3986_parse_path_absolute(uri, &cur);
if (ret != 0) {
return ret;
}
} else if (ISA_PCHAR(cur)) {
ret = rfc3986_parse_path_rootless(uri, &cur);
if (ret != 0) {
return ret;
}
} else {
/* path-empty is effectively empty */
if (uri != NULL) {
g_free(uri->path);
uri->path = NULL;
}
}
*str = cur;
return 0;
}
/**
* rfc3986_parse_relative_ref:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an URI string and fills in the appropriate fields
* of the @uri structure
*
* relative-ref = relative-part [ "?" query ] [ "#" fragment ]
* relative-part = "//" authority path-abempty
* / path-absolute
* / path-noscheme
* / path-empty
*
* Returns 0 or the error code
*/
static int rfc3986_parse_relative_ref(URI *uri, const char *str)
{
int ret;
if ((*str == '/') && (*(str + 1) == '/')) {
str += 2;
ret = rfc3986_parse_authority(uri, &str);
if (ret != 0) {
return ret;
}
ret = rfc3986_parse_path_ab_empty(uri, &str);
if (ret != 0) {
return ret;
}
} else if (*str == '/') {
ret = rfc3986_parse_path_absolute(uri, &str);
if (ret != 0) {
return ret;
}
} else if (ISA_PCHAR(str)) {
ret = rfc3986_parse_path_no_scheme(uri, &str);
if (ret != 0) {
return ret;
}
} else {
/* path-empty is effectively empty */
if (uri != NULL) {
g_free(uri->path);
uri->path = NULL;
}
}
if (*str == '?') {
str++;
ret = rfc3986_parse_query(uri, &str);
if (ret != 0) {
return ret;
}
}
if (*str == '#') {
str++;
ret = rfc3986_parse_fragment(uri, &str);
if (ret != 0) {
return ret;
}
}
if (*str != 0) {
uri_clean(uri);
return 1;
}
return 0;
}
/**
* rfc3986_parse:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an URI string and fills in the appropriate fields
* of the @uri structure
*
* scheme ":" hier-part [ "?" query ] [ "#" fragment ]
*
* Returns 0 or the error code
*/
static int rfc3986_parse(URI *uri, const char *str)
{
int ret;
ret = rfc3986_parse_scheme(uri, &str);
if (ret != 0) {
return ret;
}
if (*str != ':') {
return 1;
}
str++;
ret = rfc3986_parse_hier_part(uri, &str);
if (ret != 0) {
return ret;
}
if (*str == '?') {
str++;
ret = rfc3986_parse_query(uri, &str);
if (ret != 0) {
return ret;
}
}
if (*str == '#') {
str++;
ret = rfc3986_parse_fragment(uri, &str);
if (ret != 0) {
return ret;
}
}
if (*str != 0) {
uri_clean(uri);
return 1;
}
return 0;
}
/**
* rfc3986_parse_uri_reference:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an URI reference string and fills in the appropriate fields
* of the @uri structure
*
* URI-reference = URI / relative-ref
*
* Returns 0 or the error code
*/
static int rfc3986_parse_uri_reference(URI *uri, const char *str)
{
int ret;
if (str == NULL) {
return -1;
}
uri_clean(uri);
/*
* Try first to parse absolute refs, then fallback to relative if
* it fails.
*/
ret = rfc3986_parse(uri, str);
if (ret != 0) {
uri_clean(uri);
ret = rfc3986_parse_relative_ref(uri, str);
if (ret != 0) {
uri_clean(uri);
return ret;
}
}
return 0;
}
/**
* uri_parse:
* @str: the URI string to analyze
*
* Parse an URI based on RFC 3986
*
* URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ]
*
* Returns a newly built URI or NULL in case of error
*/
URI *uri_parse(const char *str)
{
URI *uri;
int ret;
if (str == NULL) {
return NULL;
}
uri = uri_new();
ret = rfc3986_parse_uri_reference(uri, str);
if (ret) {
uri_free(uri);
return NULL;
}
return uri;
}
/**
* uri_parse_into:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an URI reference string based on RFC 3986 and fills in the
* appropriate fields of the @uri structure
*
* URI-reference = URI / relative-ref
*
* Returns 0 or the error code
*/
int uri_parse_into(URI *uri, const char *str)
{
return rfc3986_parse_uri_reference(uri, str);
}
/**
* uri_parse_raw:
* @str: the URI string to analyze
* @raw: if 1 unescaping of URI pieces are disabled
*
* Parse an URI but allows to keep intact the original fragments.
*
* URI-reference = URI / relative-ref
*
* Returns a newly built URI or NULL in case of error
*/
URI *uri_parse_raw(const char *str, int raw)
{
URI *uri;
int ret;
if (str == NULL) {
return NULL;
}
uri = uri_new();
if (raw) {
uri->cleanup |= 2;
}
ret = uri_parse_into(uri, str);
if (ret) {
uri_free(uri);
return NULL;
}
return uri;
}
/************************************************************************
* *
* Generic URI structure functions *
* *
************************************************************************/
/**
* uri_new:
*
* Simply creates an empty URI
*
* Returns the new structure or NULL in case of error
*/
URI *uri_new(void)
{
return g_new0(URI, 1);
}
/**
* realloc2n:
*
* Function to handle properly a reallocation when saving an URI
* Also imposes some limit on the length of an URI string output
*/
static char *realloc2n(char *ret, int *max)
{
char *temp;
int tmp;
tmp = *max * 2;
temp = g_realloc(ret, (tmp + 1));
*max = tmp;
return temp;
}
/**
* uri_to_string:
* @uri: pointer to an URI
*
* Save the URI as an escaped string
*
* Returns a new string (to be deallocated by caller)
*/
char *uri_to_string(URI *uri)
{
char *ret = NULL;
char *temp;
const char *p;
int len;
int max;
if (uri == NULL) {
return NULL;
}
max = 80;
ret = g_malloc(max + 1);
len = 0;
if (uri->scheme != NULL) {
p = uri->scheme;
while (*p != 0) {
if (len >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len++] = *p++;
}
if (len >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len++] = ':';
}
if (uri->opaque != NULL) {
p = uri->opaque;
while (*p != 0) {
if (len + 3 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
if (IS_RESERVED(*(p)) || IS_UNRESERVED(*(p))) {
ret[len++] = *p++;
} else {
int val = *(unsigned char *)p++;
int hi = val / 0x10, lo = val % 0x10;
ret[len++] = '%';
ret[len++] = hi + (hi > 9 ? 'A' - 10 : '0');
ret[len++] = lo + (lo > 9 ? 'A' - 10 : '0');
}
}
} else {
if (uri->server != NULL) {
if (len + 3 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len++] = '/';
ret[len++] = '/';
if (uri->user != NULL) {
p = uri->user;
while (*p != 0) {
if (len + 3 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
if ((IS_UNRESERVED(*(p))) || ((*(p) == ';')) ||
((*(p) == ':')) || ((*(p) == '&')) || ((*(p) == '=')) ||
((*(p) == '+')) || ((*(p) == '$')) || ((*(p) == ','))) {
ret[len++] = *p++;
} else {
int val = *(unsigned char *)p++;
int hi = val / 0x10, lo = val % 0x10;
ret[len++] = '%';
ret[len++] = hi + (hi > 9 ? 'A' - 10 : '0');
ret[len++] = lo + (lo > 9 ? 'A' - 10 : '0');
}
}
if (len + 3 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len++] = '@';
}
p = uri->server;
while (*p != 0) {
if (len >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len++] = *p++;
}
if (uri->port > 0) {
if (len + 10 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
len += snprintf(&ret[len], max - len, ":%d", uri->port);
}
} else if (uri->authority != NULL) {
if (len + 3 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len++] = '/';
ret[len++] = '/';
p = uri->authority;
while (*p != 0) {
if (len + 3 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
if ((IS_UNRESERVED(*(p))) || ((*(p) == '$')) ||
((*(p) == ',')) || ((*(p) == ';')) || ((*(p) == ':')) ||
((*(p) == '@')) || ((*(p) == '&')) || ((*(p) == '=')) ||
((*(p) == '+'))) {
ret[len++] = *p++;
} else {
int val = *(unsigned char *)p++;
int hi = val / 0x10, lo = val % 0x10;
ret[len++] = '%';
ret[len++] = hi + (hi > 9 ? 'A' - 10 : '0');
ret[len++] = lo + (lo > 9 ? 'A' - 10 : '0');
}
}
} else if (uri->scheme != NULL) {
if (len + 3 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len++] = '/';
ret[len++] = '/';
}
if (uri->path != NULL) {
p = uri->path;
/*
* the colon in file:///d: should not be escaped or
* Windows accesses fail later.
*/
if ((uri->scheme != NULL) && (p[0] == '/') &&
(((p[1] >= 'a') && (p[1] <= 'z')) ||
((p[1] >= 'A') && (p[1] <= 'Z'))) &&
(p[2] == ':') && (!strcmp(uri->scheme, "file"))) {
if (len + 3 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len++] = *p++;
ret[len++] = *p++;
ret[len++] = *p++;
}
while (*p != 0) {
if (len + 3 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
if ((IS_UNRESERVED(*(p))) || ((*(p) == '/')) ||
((*(p) == ';')) || ((*(p) == '@')) || ((*(p) == '&')) ||
((*(p) == '=')) || ((*(p) == '+')) || ((*(p) == '$')) ||
((*(p) == ','))) {
ret[len++] = *p++;
} else {
int val = *(unsigned char *)p++;
int hi = val / 0x10, lo = val % 0x10;
ret[len++] = '%';
ret[len++] = hi + (hi > 9 ? 'A' - 10 : '0');
ret[len++] = lo + (lo > 9 ? 'A' - 10 : '0');
}
}
}
if (uri->query != NULL) {
if (len + 1 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len++] = '?';
p = uri->query;
while (*p != 0) {
if (len + 1 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len++] = *p++;
}
}
}
if (uri->fragment != NULL) {
if (len + 3 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len++] = '#';
p = uri->fragment;
while (*p != 0) {
if (len + 3 >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
if ((IS_UNRESERVED(*(p))) || (IS_RESERVED(*(p)))) {
ret[len++] = *p++;
} else {
int val = *(unsigned char *)p++;
int hi = val / 0x10, lo = val % 0x10;
ret[len++] = '%';
ret[len++] = hi + (hi > 9 ? 'A' - 10 : '0');
ret[len++] = lo + (lo > 9 ? 'A' - 10 : '0');
}
}
}
if (len >= max) {
temp = realloc2n(ret, &max);
ret = temp;
}
ret[len] = 0;
return ret;
}
/**
* uri_clean:
* @uri: pointer to an URI
*
* Make sure the URI struct is free of content
*/
static void uri_clean(URI *uri)
{
if (uri == NULL) {
return;
}
g_free(uri->scheme);
uri->scheme = NULL;
g_free(uri->server);
uri->server = NULL;
g_free(uri->user);
uri->user = NULL;
g_free(uri->path);
uri->path = NULL;
g_free(uri->fragment);
uri->fragment = NULL;
g_free(uri->opaque);
uri->opaque = NULL;
g_free(uri->authority);
uri->authority = NULL;
g_free(uri->query);
uri->query = NULL;
}
/**
* uri_free:
* @uri: pointer to an URI, NULL is ignored
*
* Free up the URI struct
*/
void uri_free(URI *uri)
{
uri_clean(uri);
g_free(uri);
}
/************************************************************************
* *
* Public functions *
* *
************************************************************************/
/*
* Utility functions to help parse and assemble query strings.
*/
struct QueryParams *query_params_new(int init_alloc)
{
struct QueryParams *ps;
if (init_alloc <= 0) {
init_alloc = 1;
}
ps = g_new(QueryParams, 1);
ps->n = 0;
ps->alloc = init_alloc;
ps->p = g_new(QueryParam, ps->alloc);
return ps;
}
/* Ensure there is space to store at least one more parameter
* at the end of the set.
*/
static int query_params_append(struct QueryParams *ps, const char *name,
const char *value)
{
if (ps->n >= ps->alloc) {
ps->p = g_renew(QueryParam, ps->p, ps->alloc * 2);
ps->alloc *= 2;
}
ps->p[ps->n].name = g_strdup(name);
ps->p[ps->n].value = g_strdup(value);
ps->p[ps->n].ignore = 0;
ps->n++;
return 0;
}
void query_params_free(struct QueryParams *ps)
{
int i;
for (i = 0; i < ps->n; ++i) {
g_free(ps->p[i].name);
g_free(ps->p[i].value);
}
g_free(ps->p);
g_free(ps);
}
struct QueryParams *query_params_parse(const char *query)
{
struct QueryParams *ps;
const char *end, *eq;
ps = query_params_new(0);
if (!query || query[0] == '\0') {
return ps;
}
while (*query) {
char *name = NULL, *value = NULL;
/* Find the next separator, or end of the string. */
end = strchr(query, '&');
if (!end) {
end = qemu_strchrnul(query, ';');
}
/* Find the first '=' character between here and end. */
eq = strchr(query, '=');
if (eq && eq >= end) {
eq = NULL;
}
/* Empty section (eg. "&&"). */
if (end == query) {
goto next;
}
/* If there is no '=' character, then we have just "name"
* and consistent with CGI.pm we assume value is "".
*/
else if (!eq) {
name = g_uri_unescape_segment(query, end, NULL);
value = NULL;
}
/* Or if we have "name=" here (works around annoying
* problem when calling uri_string_unescape with len = 0).
*/
else if (eq + 1 == end) {
name = g_uri_unescape_segment(query, eq, NULL);
value = g_new0(char, 1);
}
/* If the '=' character is at the beginning then we have
* "=value" and consistent with CGI.pm we _ignore_ this.
*/
else if (query == eq) {
goto next;
}
/* Otherwise it's "name=value". */
else {
name = g_uri_unescape_segment(query, eq, NULL);
value = g_uri_unescape_segment(eq + 1, end, NULL);
}
/* Append to the parameter set. */
query_params_append(ps, name, value);
g_free(name);
g_free(value);
next:
query = end;
if (*query) {
query++; /* skip '&' separator */
}
}
return ps;
}
