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Commit bb6808ea authored by Daniel Veillard's avatar Daniel Veillard
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trying to clear #63336 allowing the escaping routine to parse unconformant 

* uri.c include/libxml/uri.h: trying to clear #63336
  allowing the escaping routine to parse unconformant
  URI-References.
Daniel
parent acf7ff0a
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View file @ bb6808ea
Tue Oct 30 00:56:05 CET 2001 Daniel Veillard <daniel@veillard.com>
* uri.c include/libxml/uri.h: trying to clear #63336
allowing the escaping routine to parse unconformant
URI-References.
Mon Oct 29 19:09:46 CET 2001 Daniel Veillard <daniel@veillard.com>
* vms/readme.vms vms/build_libxml.com nanoftp.c
......
include/libxml/uri.h
View file @ bb6808ea
......@@ -35,6 +35,7 @@ struct _xmlURI {
char *path; /* the path string */
char *query; /* the query string */
char *fragment; /* the fragment identifier */
int cleanup; /* parsing potentially unclean URI */
};
/*
......
uri.c
View file @ bb6808ea
......@@ -155,6 +155,15 @@
#define IS_URIC(p) ((IS_UNRESERVED(*(p))) || (IS_ESCAPED(p)) || \
(IS_RESERVED(*(p))))
/*
* unwise = "{" | "}" | "|" | "\" | "^" | "[" | "]" | "`"
*/
#define IS_UNWISE(p) \
(((*(p) == '{')) || ((*(p) == '}')) || ((*(p) == '|')) || \
((*(p) == '\\')) || ((*(p) == '^')) || ((*(p) == '[')) || \
((*(p) == ']')) || ((*(p) == '`')))
/*
* Skip to next pointer char, handle escaped sequences
*/
......@@ -600,141 +609,6 @@ xmlFreeURI(xmlURIPtr uri) {
* *
************************************************************************/
#if 0
/**
* xmlNormalizeURIPath:
* @path: pointer to the path string
*
* applies the 5 normalization steps to a path string
* Normalization occurs directly on the string, no new allocation is done
*
* Returns 0 or an error code
*/
int
xmlNormalizeURIPath(char *path) {
int cur, out;
if (path == NULL)
return(-1);
cur = 0;
out = 0;
while ((path[cur] != 0) && (path[cur] != '/')) cur++;
if (path[cur] == 0)
return(0);
/* we are positionned at the beginning of the first segment */
cur++;
out = cur;
/*
* Analyze each segment in sequence.
*/
while (path[cur] != 0) {
/*
* c) All occurrences of "./", where "." is a complete path segment,
* are removed from the buffer string.
*/
if ((path[cur] == '.') && (path[cur + 1] == '/')) {
cur += 2;
if (path[cur] == 0) {
path[out++] = 0;
}
continue;
}
/*
* d) If the buffer string ends with "." as a complete path segment,
* that "." is removed.
*/
if ((path[cur] == '.') && (path[cur + 1] == 0)) {
path[out] = 0;
break;
}
/* read the segment */
while ((path[cur] != 0) && (path[cur] != '/')) {
path[out++] = path[cur++];
}
path[out++] = path[cur];
if (path[cur] != 0) {
cur++;
}
}
cur = 0;
out = 0;
while ((path[cur] != 0) && (path[cur] != '/')) cur++;
if (path[cur] == 0)
return(0);
/* we are positionned at the beginning of the first segment */
cur++;
out = cur;
/*
* Analyze each segment in sequence.
*/
while (path[cur] != 0) {
/*
* e) All occurrences of "<segment>/../", where <segment> is a
* complete path segment not equal to "..", are removed from the
* buffer string. Removal of these path segments is performed
* iteratively, removing the leftmost matching pattern on each
* iteration, until no matching pattern remains.
*/
if ((cur > 1) && (out > 1) &&
(path[cur] == '/') && (path[cur + 1] == '.') &&
(path[cur + 2] == '.') && (path[cur + 3] == '/') &&
((path[out] != '.') || (path[out - 1] != '.') ||
(path[out - 2] != '/'))) {
cur += 3;
out --;
while ((out > 0) && (path[out] != '/')) { out --; }
path[out] = 0;
continue;
}
/*
* f) If the buffer string ends with "<segment>/..", where <segment>
* is a complete path segment not equal to "..", that
* "<segment>/.." is removed.
*/
if ((path[cur] == '/') && (path[cur + 1] == '.') &&
(path[cur + 2] == '.') && (path[cur + 3] == 0) &&
((path[out] != '.') || (path[out - 1] != '.') ||
(path[out - 2] != '/'))) {
cur += 4;
out --;
while ((out > 0) && (path[out - 1] != '/')) { out --; }
path[out] = 0;
continue;
}
path[out++] = path[cur++]; /* / or 0 */
}
path[out] = 0;
/*
* g) If the resulting buffer string still begins with one or more
* complete path segments of "..", then the reference is
* considered to be in error. Implementations may handle this
* error by retaining these components in the resolved path (i.e.,
* treating them as part of the final URI), by removing them from
* the resolved path (i.e., discarding relative levels above the
* root), or by avoiding traversal of the reference.
*
* We discard them from the final path.
*/
cur = 0;
while ((path[cur] == '/') && (path[cur + 1] == '.') &&
(path[cur + 2] == '.'))
cur += 3;
if (cur != 0) {
out = 0;
while (path[cur] != 0) path[out++] = path[cur++];
path[out] = 0;
}
return(0);
}
#else
/**
* xmlNormalizeURIPath:
* @path: pointer to the path string
......@@ -918,7 +792,6 @@ xmlNormalizeURIPath(char *path) {
return(0);
}
#endif
/**
* xmlURIUnescapeString:
......@@ -1066,13 +939,25 @@ xmlChar *
xmlURIEscape(const xmlChar *str) {
xmlChar *ret, *segment = NULL;
xmlURIPtr uri;
int ret2;
#define NULLCHK(p) if(!p) { \
xmlGenericError(xmlGenericErrorContext, \
"xmlURIEscape: out of memory\n"); \
return NULL; }
uri = xmlParseURI( (const char *) str);
if (str == NULL)
return(NULL);
uri = xmlCreateURI();
if (uri != NULL) {
uri->cleanup = 1;
ret2 = xmlParseURIReference(uri, str);
if (ret2) {
xmlFreeURI(uri);
return(NULL);
}
}
if(!uri)
return NULL;
......@@ -1179,7 +1064,7 @@ xmlParseURIFragment(xmlURIPtr uri, const char **str) {
if (str == NULL) return(-1);
while (IS_URIC(cur)) NEXT(cur);
while (IS_URIC(cur) || ((uri->cleanup) && (IS_UNWISE(cur)))) NEXT(cur);
if (uri != NULL) {
if (uri->fragment != NULL) xmlFree(uri->fragment);
uri->fragment = xmlURIUnescapeString(*str, cur - *str, NULL);
......@@ -1265,11 +1150,11 @@ xmlParseURIOpaquePart(xmlURIPtr uri, const char **str) {
return(-1);
cur = *str;
if (!IS_URIC_NO_SLASH(cur)) {
if (!(IS_URIC_NO_SLASH(cur) || ((uri->cleanup) && (IS_UNWISE(cur))))) {
return(3);
}
NEXT(cur);
while (IS_URIC(cur)) NEXT(cur);
while (IS_URIC(cur) || ((uri->cleanup) && (IS_UNWISE(cur)))) NEXT(cur);
if (uri != NULL) {
if (uri->opaque != NULL) xmlFree(uri->opaque);
uri->opaque = xmlURIUnescapeString(*str, cur - *str, NULL);
......@@ -1441,11 +1326,11 @@ xmlParseURIRelSegment(xmlURIPtr uri, const char **str) {
return(-1);
cur = *str;
if (!IS_SEGMENT(cur)) {
if (!IS_SEGMENT(cur) || ((uri->cleanup) && (IS_UNWISE(cur)))) {
return(3);
}
NEXT(cur);
while (IS_SEGMENT(cur)) NEXT(cur);
while (IS_SEGMENT(cur) || ((uri->cleanup) && (IS_UNWISE(cur)))) NEXT(cur);
if (uri != NULL) {
if (uri->path != NULL) xmlFree(uri->path);
uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
......@@ -1478,10 +1363,12 @@ xmlParseURIPathSegments(xmlURIPtr uri, const char **str, int slash) {
cur = *str;
do {
while (IS_PCHAR(cur)) NEXT(cur);
while (IS_PCHAR(cur) || ((uri->cleanup) && (IS_UNWISE(cur))))
NEXT(cur);
if (*cur == ';') {
cur++;
while (IS_PCHAR(cur)) NEXT(cur);
while (IS_PCHAR(cur) || ((uri->cleanup) && (IS_UNWISE(cur))))
NEXT(cur);
}
if (*cur != '/') break;
cur++;
......
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