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2567 lines (2368 loc) · 65.5 KB
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/**
* uri.c: set of generic URI related routines
*
* Reference: RFCs 3986, 2732 and 2373
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#define IN_LIBXML
#include "libxml.h"
#include <string.h>
#include <libxml/xmlmemory.h>
#include <libxml/uri.h>
#include <libxml/globals.h>
#include <libxml/xmlerror.h>
/**
* MAX_URI_LENGTH:
*
* The definition of the URI regexp in the above RFC has no size limit
* In practice they are usually relativey short except for the
* data URI scheme as defined in RFC 2397. Even for data URI the usual
* maximum size before hitting random practical limits is around 64 KB
* and 4KB is usually a maximum admitted limit for proper operations.
* The value below is more a security limit than anything else and
* really should never be hit by 'normal' operations
* Set to 1 MByte in 2012, this is only enforced on output
*/
#define MAX_URI_LENGTH 1024 * 1024
static void
xmlURIErrMemory(const char *extra)
{
if (extra)
__xmlRaiseError(NULL, NULL, NULL,
NULL, NULL, XML_FROM_URI,
XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0,
extra, NULL, NULL, 0, 0,
"Memory allocation failed : %s\n", extra);
else
__xmlRaiseError(NULL, NULL, NULL,
NULL, NULL, XML_FROM_URI,
XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0,
NULL, NULL, NULL, 0, 0,
"Memory allocation failed\n");
}
static void xmlCleanURI(xmlURIPtr 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 | "$" | "," |
* ";" | ":" | "@" | "&" | "=" | "+" )
*
* path = [ abs_path | opaque_part ]
*/
#define STRNDUP(s, n) (char *) xmlStrndup((const xmlChar *)(s), (n))
/************************************************************************
* *
* RFC 3986 parser *
* *
************************************************************************/
#define ISA_DIGIT(p) ((*(p) >= '0') && (*(p) <= '9'))
#define ISA_ALPHA(p) (((*(p) >= 'a') && (*(p) <= 'z')) || \
((*(p) >= 'A') && (*(p) <= 'Z')))
#define ISA_HEXDIG(p) \
(ISA_DIGIT(p) || ((*(p) >= 'a') && (*(p) <= 'f')) || \
((*(p) >= 'A') && (*(p) <= 'F')))
/*
* sub-delims = "!" / "$" / "&" / "'" / "(" / ")"
* / "*" / "+" / "," / ";" / "="
*/
#define ISA_SUB_DELIM(p) \
(((*(p) == '!')) || ((*(p) == '$')) || ((*(p) == '&')) || \
((*(p) == '(')) || ((*(p) == ')')) || ((*(p) == '*')) || \
((*(p) == '+')) || ((*(p) == ',')) || ((*(p) == ';')) || \
((*(p) == '=')) || ((*(p) == '\'')))
/*
* gen-delims = ":" / "/" / "?" / "#" / "[" / "]" / "@"
*/
#define ISA_GEN_DELIM(p) \
(((*(p) == ':')) || ((*(p) == '/')) || ((*(p) == '?')) || \
((*(p) == '#')) || ((*(p) == '[')) || ((*(p) == ']')) || \
((*(p) == '@')))
/*
* reserved = gen-delims / sub-delims
*/
#define ISA_RESERVED(p) (ISA_GEN_DELIM(p) || (ISA_SUB_DELIM(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) == '@')))
/**
* xmlParse3986Scheme:
* @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
xmlParse3986Scheme(xmlURIPtr 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) {
if (uri->scheme != NULL) xmlFree(uri->scheme);
uri->scheme = STRNDUP(*str, cur - *str);
}
*str = cur;
return(0);
}
/**
* xmlParse3986Fragment:
* @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
xmlParse3986Fragment(xmlURIPtr 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) {
if (uri->fragment != NULL)
xmlFree(uri->fragment);
if (uri->cleanup & 2)
uri->fragment = STRNDUP(*str, cur - *str);
else
uri->fragment = xmlURIUnescapeString(*str, cur - *str, NULL);
}
*str = cur;
return (0);
}
/**
* xmlParse3986Query:
* @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
xmlParse3986Query(xmlURIPtr 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) {
if (uri->query != NULL)
xmlFree(uri->query);
if (uri->cleanup & 2)
uri->query = STRNDUP(*str, cur - *str);
else
uri->query = xmlURIUnescapeString(*str, cur - *str, NULL);
/* Save the raw bytes of the query as well.
* See: http://mail.gnome.org/archives/xml/2007-April/thread.html#00114
*/
if (uri->query_raw != NULL)
xmlFree (uri->query_raw);
uri->query_raw = STRNDUP (*str, cur - *str);
}
*str = cur;
return (0);
}
/**
* xmlParse3986Port:
* @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
xmlParse3986Port(xmlURIPtr uri, const char **str)
{
const char *cur = *str;
unsigned port = 0; /* unsigned for defined overflow behavior */
if (ISA_DIGIT(cur)) {
while (ISA_DIGIT(cur)) {
port = port * 10 + (*cur - '0');
cur++;
}
if (uri != NULL)
uri->port = port & INT_MAX; /* port value modulo INT_MAX+1 */
*str = cur;
return(0);
}
return(1);
}
/**
* xmlParse3986Userinfo:
* @uri: pointer to an URI structure
* @str: the string to analyze
*
* Parse an user informations part and fills in the appropriate fields
* of the @uri structure
*
* userinfo = *( unreserved / pct-encoded / sub-delims / ":" )
*
* Returns 0 or the error code
*/
static int
xmlParse3986Userinfo(xmlURIPtr 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) {
if (uri->user != NULL) xmlFree(uri->user);
if (uri->cleanup & 2)
uri->user = STRNDUP(*str, cur - *str);
else
uri->user = xmlURIUnescapeString(*str, cur - *str, NULL);
}
*str = cur;
return(0);
}
return(1);
}
/**
* xmlParse3986DecOctet:
* @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
xmlParse3986DecOctet(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);
}
/**
* xmlParse3986Host:
* @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
xmlParse3986Host(xmlURIPtr uri, const char **str)
{
const char *cur = *str;
const char *host;
host = cur;
/*
* IPv6 and future adressing 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 (xmlParse3986DecOctet(&cur) != 0)
goto not_ipv4;
if (*cur != '.')
goto not_ipv4;
cur++;
if (xmlParse3986DecOctet(&cur) != 0)
goto not_ipv4;
if (*cur != '.')
goto not_ipv4;
if (xmlParse3986DecOctet(&cur) != 0)
goto not_ipv4;
if (*cur != '.')
goto not_ipv4;
if (xmlParse3986DecOctet(&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) {
if (uri->authority != NULL) xmlFree(uri->authority);
uri->authority = NULL;
if (uri->server != NULL) xmlFree(uri->server);
if (cur != host) {
if (uri->cleanup & 2)
uri->server = STRNDUP(host, cur - host);
else
uri->server = xmlURIUnescapeString(host, cur - host, NULL);
} else
uri->server = NULL;
}
*str = cur;
return(0);
}
/**
* xmlParse3986Authority:
* @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
xmlParse3986Authority(xmlURIPtr uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
/*
* try to parse an userinfo and check for the trailing @
*/
ret = xmlParse3986Userinfo(uri, &cur);
if ((ret != 0) || (*cur != '@'))
cur = *str;
else
cur++;
ret = xmlParse3986Host(uri, &cur);
if (ret != 0) return(ret);
if (*cur == ':') {
cur++;
ret = xmlParse3986Port(uri, &cur);
if (ret != 0) return(ret);
}
*str = cur;
return(0);
}
/**
* xmlParse3986Segment:
* @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
xmlParse3986Segment(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);
}
/**
* xmlParse3986PathAbEmpty:
* @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
xmlParse3986PathAbEmpty(xmlURIPtr uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
while (*cur == '/') {
cur++;
ret = xmlParse3986Segment(&cur, 0, 1);
if (ret != 0) return(ret);
}
if (uri != NULL) {
if (uri->path != NULL) xmlFree(uri->path);
if (*str != cur) {
if (uri->cleanup & 2)
uri->path = STRNDUP(*str, cur - *str);
else
uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
} else {
uri->path = NULL;
}
}
*str = cur;
return (0);
}
/**
* xmlParse3986PathAbsolute:
* @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
xmlParse3986PathAbsolute(xmlURIPtr uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
if (*cur != '/')
return(1);
cur++;
ret = xmlParse3986Segment(&cur, 0, 0);
if (ret == 0) {
while (*cur == '/') {
cur++;
ret = xmlParse3986Segment(&cur, 0, 1);
if (ret != 0) return(ret);
}
}
if (uri != NULL) {
if (uri->path != NULL) xmlFree(uri->path);
if (cur != *str) {
if (uri->cleanup & 2)
uri->path = STRNDUP(*str, cur - *str);
else
uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
} else {
uri->path = NULL;
}
}
*str = cur;
return (0);
}
/**
* xmlParse3986PathRootless:
* @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
xmlParse3986PathRootless(xmlURIPtr uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
ret = xmlParse3986Segment(&cur, 0, 0);
if (ret != 0) return(ret);
while (*cur == '/') {
cur++;
ret = xmlParse3986Segment(&cur, 0, 1);
if (ret != 0) return(ret);
}
if (uri != NULL) {
if (uri->path != NULL) xmlFree(uri->path);
if (cur != *str) {
if (uri->cleanup & 2)
uri->path = STRNDUP(*str, cur - *str);
else
uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
} else {
uri->path = NULL;
}
}
*str = cur;
return (0);
}
/**
* xmlParse3986PathNoScheme:
* @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
xmlParse3986PathNoScheme(xmlURIPtr uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
ret = xmlParse3986Segment(&cur, ':', 0);
if (ret != 0) return(ret);
while (*cur == '/') {
cur++;
ret = xmlParse3986Segment(&cur, 0, 1);
if (ret != 0) return(ret);
}
if (uri != NULL) {
if (uri->path != NULL) xmlFree(uri->path);
if (cur != *str) {
if (uri->cleanup & 2)
uri->path = STRNDUP(*str, cur - *str);
else
uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
} else {
uri->path = NULL;
}
}
*str = cur;
return (0);
}
/**
* xmlParse3986HierPart:
* @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
xmlParse3986HierPart(xmlURIPtr uri, const char **str)
{
const char *cur;
int ret;
cur = *str;
if ((*cur == '/') && (*(cur + 1) == '/')) {
cur += 2;
ret = xmlParse3986Authority(uri, &cur);
if (ret != 0) return(ret);
if (uri->server == NULL)
uri->port = -1;
ret = xmlParse3986PathAbEmpty(uri, &cur);
if (ret != 0) return(ret);
*str = cur;
return(0);
} else if (*cur == '/') {
ret = xmlParse3986PathAbsolute(uri, &cur);
if (ret != 0) return(ret);
} else if (ISA_PCHAR(cur)) {
ret = xmlParse3986PathRootless(uri, &cur);
if (ret != 0) return(ret);
} else {
/* path-empty is effectively empty */
if (uri != NULL) {
if (uri->path != NULL) xmlFree(uri->path);
uri->path = NULL;
}
}
*str = cur;
return (0);
}
/**
* xmlParse3986RelativeRef:
* @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
xmlParse3986RelativeRef(xmlURIPtr uri, const char *str) {
int ret;
if ((*str == '/') && (*(str + 1) == '/')) {
str += 2;
ret = xmlParse3986Authority(uri, &str);
if (ret != 0) return(ret);
ret = xmlParse3986PathAbEmpty(uri, &str);
if (ret != 0) return(ret);
} else if (*str == '/') {
ret = xmlParse3986PathAbsolute(uri, &str);
if (ret != 0) return(ret);
} else if (ISA_PCHAR(str)) {
ret = xmlParse3986PathNoScheme(uri, &str);
if (ret != 0) return(ret);
} else {
/* path-empty is effectively empty */
if (uri != NULL) {
if (uri->path != NULL) xmlFree(uri->path);
uri->path = NULL;
}
}
if (*str == '?') {
str++;
ret = xmlParse3986Query(uri, &str);
if (ret != 0) return(ret);
}
if (*str == '#') {
str++;
ret = xmlParse3986Fragment(uri, &str);
if (ret != 0) return(ret);
}
if (*str != 0) {
xmlCleanURI(uri);
return(1);
}
return(0);
}
/**
* xmlParse3986URI:
* @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
xmlParse3986URI(xmlURIPtr uri, const char *str) {
int ret;
ret = xmlParse3986Scheme(uri, &str);
if (ret != 0) return(ret);
if (*str != ':') {
return(1);
}
str++;
ret = xmlParse3986HierPart(uri, &str);
if (ret != 0) return(ret);
if (*str == '?') {
str++;
ret = xmlParse3986Query(uri, &str);
if (ret != 0) return(ret);
}
if (*str == '#') {
str++;
ret = xmlParse3986Fragment(uri, &str);
if (ret != 0) return(ret);
}
if (*str != 0) {
xmlCleanURI(uri);
return(1);
}
return(0);
}
/**
* xmlParse3986URIReference:
* @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
xmlParse3986URIReference(xmlURIPtr uri, const char *str) {
int ret;
if (str == NULL)
return(-1);
xmlCleanURI(uri);
/*
* Try first to parse absolute refs, then fallback to relative if
* it fails.
*/
ret = xmlParse3986URI(uri, str);
if (ret != 0) {
xmlCleanURI(uri);
ret = xmlParse3986RelativeRef(uri, str);
if (ret != 0) {
xmlCleanURI(uri);
return(ret);
}
}
return(0);
}
/**
* xmlParseURI:
* @str: the URI string to analyze
*
* Parse an URI based on RFC 3986
*
* URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ]
*
* Returns a newly built xmlURIPtr or NULL in case of error
*/
xmlURIPtr
xmlParseURI(const char *str) {
xmlURIPtr uri;
int ret;
if (str == NULL)
return(NULL);
uri = xmlCreateURI();
if (uri != NULL) {
ret = xmlParse3986URIReference(uri, str);
if (ret) {
xmlFreeURI(uri);
return(NULL);
}
}
return(uri);
}
/**
* xmlParseURIReference:
* @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
xmlParseURIReference(xmlURIPtr uri, const char *str) {
return(xmlParse3986URIReference(uri, str));
}
/**
* xmlParseURIRaw:
* @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 xmlURIPtr or NULL in case of error
*/
xmlURIPtr
xmlParseURIRaw(const char *str, int raw) {
xmlURIPtr uri;
int ret;
if (str == NULL)
return(NULL);
uri = xmlCreateURI();
if (uri != NULL) {
if (raw) {
uri->cleanup |= 2;
}
ret = xmlParseURIReference(uri, str);
if (ret) {
xmlFreeURI(uri);
return(NULL);
}
}
return(uri);
}
/************************************************************************
* *
* Generic URI structure functions *