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2555 lines
65 KiB
C
2555 lines
65 KiB
C
/**
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* uri.c: set of generic URI related routines
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*
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* Reference: RFCs 3986, 2732 and 2373
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*
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* See Copyright for the status of this software.
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*
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* daniel@veillard.com
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*/
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#define IN_LIBXML
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#include "libxml.h"
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#include <string.h>
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#include <libxml/xmlmemory.h>
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#include <libxml/uri.h>
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#include <libxml/globals.h>
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#include <libxml/xmlerror.h>
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/**
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* MAX_URI_LENGTH:
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*
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* The definition of the URI regexp in the above RFC has no size limit
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* In practice they are usually relatively short except for the
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* data URI scheme as defined in RFC 2397. Even for data URI the usual
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* maximum size before hitting random practical limits is around 64 KB
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* and 4KB is usually a maximum admitted limit for proper operations.
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* The value below is more a security limit than anything else and
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* really should never be hit by 'normal' operations
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* Set to 1 MByte in 2012, this is only enforced on output
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*/
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#define MAX_URI_LENGTH 1024 * 1024
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static void
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xmlURIErrMemory(const char *extra)
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{
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if (extra)
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__xmlRaiseError(NULL, NULL, NULL,
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NULL, NULL, XML_FROM_URI,
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XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0,
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extra, NULL, NULL, 0, 0,
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"Memory allocation failed : %s\n", extra);
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else
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__xmlRaiseError(NULL, NULL, NULL,
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NULL, NULL, XML_FROM_URI,
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XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0,
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NULL, NULL, NULL, 0, 0,
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"Memory allocation failed\n");
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}
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static void xmlCleanURI(xmlURIPtr uri);
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/*
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* Old rule from 2396 used in legacy handling code
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* alpha = lowalpha | upalpha
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*/
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#define IS_ALPHA(x) (IS_LOWALPHA(x) || IS_UPALPHA(x))
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/*
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* lowalpha = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" | "j" |
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* "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" | "s" | "t" |
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* "u" | "v" | "w" | "x" | "y" | "z"
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*/
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#define IS_LOWALPHA(x) (((x) >= 'a') && ((x) <= 'z'))
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/*
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* upalpha = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | "J" |
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* "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" | "S" | "T" |
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* "U" | "V" | "W" | "X" | "Y" | "Z"
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*/
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#define IS_UPALPHA(x) (((x) >= 'A') && ((x) <= 'Z'))
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#ifdef IS_DIGIT
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#undef IS_DIGIT
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#endif
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/*
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* digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
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*/
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#define IS_DIGIT(x) (((x) >= '0') && ((x) <= '9'))
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/*
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* alphanum = alpha | digit
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*/
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#define IS_ALPHANUM(x) (IS_ALPHA(x) || IS_DIGIT(x))
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/*
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* mark = "-" | "_" | "." | "!" | "~" | "*" | "'" | "(" | ")"
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*/
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#define IS_MARK(x) (((x) == '-') || ((x) == '_') || ((x) == '.') || \
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((x) == '!') || ((x) == '~') || ((x) == '*') || ((x) == '\'') || \
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((x) == '(') || ((x) == ')'))
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/*
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* unwise = "{" | "}" | "|" | "\" | "^" | "`"
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*/
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#define IS_UNWISE(p) \
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(((*(p) == '{')) || ((*(p) == '}')) || ((*(p) == '|')) || \
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((*(p) == '\\')) || ((*(p) == '^')) || ((*(p) == '[')) || \
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((*(p) == ']')) || ((*(p) == '`')))
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/*
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* reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" | "$" | "," |
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* "[" | "]"
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*/
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#define IS_RESERVED(x) (((x) == ';') || ((x) == '/') || ((x) == '?') || \
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((x) == ':') || ((x) == '@') || ((x) == '&') || ((x) == '=') || \
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((x) == '+') || ((x) == '$') || ((x) == ',') || ((x) == '[') || \
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((x) == ']'))
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/*
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* unreserved = alphanum | mark
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*/
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#define IS_UNRESERVED(x) (IS_ALPHANUM(x) || IS_MARK(x))
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/*
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* Skip to next pointer char, handle escaped sequences
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*/
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#define NEXT(p) ((*p == '%')? p += 3 : p++)
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/*
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* Productions from the spec.
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*
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* authority = server | reg_name
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* reg_name = 1*( unreserved | escaped | "$" | "," |
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* ";" | ":" | "@" | "&" | "=" | "+" )
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*
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* path = [ abs_path | opaque_part ]
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*/
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#define STRNDUP(s, n) (char *) xmlStrndup((const xmlChar *)(s), (n))
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/************************************************************************
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* *
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* RFC 3986 parser *
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* *
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************************************************************************/
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#define ISA_DIGIT(p) ((*(p) >= '0') && (*(p) <= '9'))
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#define ISA_ALPHA(p) (((*(p) >= 'a') && (*(p) <= 'z')) || \
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((*(p) >= 'A') && (*(p) <= 'Z')))
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#define ISA_HEXDIG(p) \
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(ISA_DIGIT(p) || ((*(p) >= 'a') && (*(p) <= 'f')) || \
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((*(p) >= 'A') && (*(p) <= 'F')))
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/*
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* sub-delims = "!" / "$" / "&" / "'" / "(" / ")"
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* / "*" / "+" / "," / ";" / "="
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*/
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#define ISA_SUB_DELIM(p) \
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(((*(p) == '!')) || ((*(p) == '$')) || ((*(p) == '&')) || \
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((*(p) == '(')) || ((*(p) == ')')) || ((*(p) == '*')) || \
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((*(p) == '+')) || ((*(p) == ',')) || ((*(p) == ';')) || \
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((*(p) == '=')) || ((*(p) == '\'')))
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/*
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* gen-delims = ":" / "/" / "?" / "#" / "[" / "]" / "@"
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*/
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#define ISA_GEN_DELIM(p) \
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(((*(p) == ':')) || ((*(p) == '/')) || ((*(p) == '?')) || \
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((*(p) == '#')) || ((*(p) == '[')) || ((*(p) == ']')) || \
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((*(p) == '@')))
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/*
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* reserved = gen-delims / sub-delims
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*/
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#define ISA_RESERVED(p) (ISA_GEN_DELIM(p) || (ISA_SUB_DELIM(p)))
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/*
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* unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
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*/
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#define ISA_UNRESERVED(p) \
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((ISA_ALPHA(p)) || (ISA_DIGIT(p)) || ((*(p) == '-')) || \
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((*(p) == '.')) || ((*(p) == '_')) || ((*(p) == '~')))
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/*
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* pct-encoded = "%" HEXDIG HEXDIG
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*/
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#define ISA_PCT_ENCODED(p) \
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((*(p) == '%') && (ISA_HEXDIG(p + 1)) && (ISA_HEXDIG(p + 2)))
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/*
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* pchar = unreserved / pct-encoded / sub-delims / ":" / "@"
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*/
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#define ISA_PCHAR(p) \
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(ISA_UNRESERVED(p) || ISA_PCT_ENCODED(p) || ISA_SUB_DELIM(p) || \
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((*(p) == ':')) || ((*(p) == '@')))
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/**
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* xmlParse3986Scheme:
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* @uri: pointer to an URI structure
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* @str: pointer to the string to analyze
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*
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* Parse an URI scheme
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*
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* ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
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*
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* Returns 0 or the error code
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*/
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static int
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xmlParse3986Scheme(xmlURIPtr uri, const char **str) {
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const char *cur;
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if (str == NULL)
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return(-1);
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cur = *str;
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if (!ISA_ALPHA(cur))
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return(2);
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cur++;
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while (ISA_ALPHA(cur) || ISA_DIGIT(cur) ||
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(*cur == '+') || (*cur == '-') || (*cur == '.')) cur++;
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if (uri != NULL) {
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if (uri->scheme != NULL) xmlFree(uri->scheme);
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uri->scheme = STRNDUP(*str, cur - *str);
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}
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*str = cur;
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return(0);
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}
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/**
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* xmlParse3986Fragment:
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* @uri: pointer to an URI structure
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* @str: pointer to the string to analyze
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*
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* Parse the query part of an URI
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*
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* fragment = *( pchar / "/" / "?" )
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* NOTE: the strict syntax as defined by 3986 does not allow '[' and ']'
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* in the fragment identifier but this is used very broadly for
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* xpointer scheme selection, so we are allowing it here to not break
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* for example all the DocBook processing chains.
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*
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* Returns 0 or the error code
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*/
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static int
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xmlParse3986Fragment(xmlURIPtr uri, const char **str)
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{
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const char *cur;
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if (str == NULL)
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return (-1);
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cur = *str;
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while ((ISA_PCHAR(cur)) || (*cur == '/') || (*cur == '?') ||
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(*cur == '[') || (*cur == ']') ||
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((uri != NULL) && (uri->cleanup & 1) && (IS_UNWISE(cur))))
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NEXT(cur);
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if (uri != NULL) {
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if (uri->fragment != NULL)
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xmlFree(uri->fragment);
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if (uri->cleanup & 2)
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uri->fragment = STRNDUP(*str, cur - *str);
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else
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uri->fragment = xmlURIUnescapeString(*str, cur - *str, NULL);
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}
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*str = cur;
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return (0);
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}
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/**
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* xmlParse3986Query:
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* @uri: pointer to an URI structure
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* @str: pointer to the string to analyze
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*
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* Parse the query part of an URI
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*
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* query = *uric
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*
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* Returns 0 or the error code
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*/
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static int
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xmlParse3986Query(xmlURIPtr uri, const char **str)
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{
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const char *cur;
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if (str == NULL)
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return (-1);
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cur = *str;
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while ((ISA_PCHAR(cur)) || (*cur == '/') || (*cur == '?') ||
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((uri != NULL) && (uri->cleanup & 1) && (IS_UNWISE(cur))))
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NEXT(cur);
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if (uri != NULL) {
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if (uri->query != NULL)
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xmlFree(uri->query);
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if (uri->cleanup & 2)
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uri->query = STRNDUP(*str, cur - *str);
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else
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uri->query = xmlURIUnescapeString(*str, cur - *str, NULL);
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/* Save the raw bytes of the query as well.
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* See: http://mail.gnome.org/archives/xml/2007-April/thread.html#00114
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*/
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if (uri->query_raw != NULL)
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xmlFree (uri->query_raw);
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uri->query_raw = STRNDUP (*str, cur - *str);
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}
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*str = cur;
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return (0);
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}
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/**
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* xmlParse3986Port:
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* @uri: pointer to an URI structure
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* @str: the string to analyze
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*
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* Parse a port part and fills in the appropriate fields
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* of the @uri structure
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*
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* port = *DIGIT
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*
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* Returns 0 or the error code
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*/
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static int
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xmlParse3986Port(xmlURIPtr uri, const char **str)
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{
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const char *cur = *str;
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int port = 0;
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if (ISA_DIGIT(cur)) {
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while (ISA_DIGIT(cur)) {
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port = port * 10 + (*cur - '0');
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if (port > 99999999)
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port = 99999999;
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cur++;
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}
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if (uri != NULL)
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uri->port = port;
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*str = cur;
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return(0);
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}
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return(1);
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}
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/**
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* xmlParse3986Userinfo:
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* @uri: pointer to an URI structure
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* @str: the string to analyze
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*
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* Parse an user informations part and fills in the appropriate fields
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* of the @uri structure
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*
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* userinfo = *( unreserved / pct-encoded / sub-delims / ":" )
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*
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* Returns 0 or the error code
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*/
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static int
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xmlParse3986Userinfo(xmlURIPtr uri, const char **str)
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{
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const char *cur;
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cur = *str;
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while (ISA_UNRESERVED(cur) || ISA_PCT_ENCODED(cur) ||
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ISA_SUB_DELIM(cur) || (*cur == ':'))
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NEXT(cur);
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if (*cur == '@') {
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if (uri != NULL) {
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if (uri->user != NULL) xmlFree(uri->user);
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if (uri->cleanup & 2)
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uri->user = STRNDUP(*str, cur - *str);
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else
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uri->user = xmlURIUnescapeString(*str, cur - *str, NULL);
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}
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*str = cur;
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return(0);
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}
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return(1);
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}
|
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|
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/**
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* xmlParse3986DecOctet:
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* @str: the string to analyze
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*
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* dec-octet = DIGIT ; 0-9
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* / %x31-39 DIGIT ; 10-99
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* / "1" 2DIGIT ; 100-199
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* / "2" %x30-34 DIGIT ; 200-249
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* / "25" %x30-35 ; 250-255
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*
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* Skip a dec-octet.
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*
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* Returns 0 if found and skipped, 1 otherwise
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*/
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static int
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xmlParse3986DecOctet(const char **str) {
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const char *cur = *str;
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|
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if (!(ISA_DIGIT(cur)))
|
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return(1);
|
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if (!ISA_DIGIT(cur+1))
|
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cur++;
|
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else if ((*cur != '0') && (ISA_DIGIT(cur + 1)) && (!ISA_DIGIT(cur+2)))
|
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cur += 2;
|
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else if ((*cur == '1') && (ISA_DIGIT(cur + 1)) && (ISA_DIGIT(cur + 2)))
|
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cur += 3;
|
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else if ((*cur == '2') && (*(cur + 1) >= '0') &&
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(*(cur + 1) <= '4') && (ISA_DIGIT(cur + 2)))
|
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cur += 3;
|
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else if ((*cur == '2') && (*(cur + 1) == '5') &&
|
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(*(cur + 2) >= '0') && (*(cur + 1) <= '5'))
|
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cur += 3;
|
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else
|
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return(1);
|
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*str = cur;
|
|
return(0);
|
|
}
|
|
/**
|
|
* xmlParse3986Host:
|
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* @uri: pointer to an URI structure
|
|
* @str: the string to analyze
|
|
*
|
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* 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 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 (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 *
|
|
* *
|
|
************************************************************************/
|
|
|
|
/**
|
|
* xmlCreateURI:
|
|
*
|
|
* Simply creates an empty xmlURI
|
|
*
|
|
* Returns the new structure or NULL in case of error
|
|
*/
|
|
xmlURIPtr
|
|
xmlCreateURI(void) {
|
|
xmlURIPtr ret;
|
|
|
|
ret = (xmlURIPtr) xmlMalloc(sizeof(xmlURI));
|
|
if (ret == NULL) {
|
|
xmlURIErrMemory("creating URI structure\n");
|
|
return(NULL);
|
|
}
|
|
memset(ret, 0, sizeof(xmlURI));
|
|
return(ret);
|
|
}
|
|
|
|
/**
|
|
* xmlSaveUriRealloc:
|
|
*
|
|
* Function to handle properly a reallocation when saving an URI
|
|
* Also imposes some limit on the length of an URI string output
|
|
*/
|
|
static xmlChar *
|
|
xmlSaveUriRealloc(xmlChar *ret, int *max) {
|
|
xmlChar *temp;
|
|
int tmp;
|
|
|
|
if (*max > MAX_URI_LENGTH) {
|
|
xmlURIErrMemory("reaching arbitrary MAX_URI_LENGTH limit\n");
|
|
return(NULL);
|
|
}
|
|
tmp = *max * 2;
|
|
temp = (xmlChar *) xmlRealloc(ret, (tmp + 1));
|
|
if (temp == NULL) {
|
|
xmlURIErrMemory("saving URI\n");
|
|
return(NULL);
|
|
}
|
|
*max = tmp;
|
|
return(temp);
|
|
}
|
|
|
|
/**
|
|
* xmlSaveUri:
|
|
* @uri: pointer to an xmlURI
|
|
*
|
|
* Save the URI as an escaped string
|
|
*
|
|
* Returns a new string (to be deallocated by caller)
|
|
*/
|
|
xmlChar *
|
|
xmlSaveUri(xmlURIPtr uri) {
|
|
xmlChar *ret = NULL;
|
|
xmlChar *temp;
|
|
const char *p;
|
|
int len;
|
|
int max;
|
|
|
|
if (uri == NULL) return(NULL);
|
|
|
|
|
|
max = 80;
|
|
ret = (xmlChar *) xmlMallocAtomic((max + 1) * sizeof(xmlChar));
|
|
if (ret == NULL) {
|
|
xmlURIErrMemory("saving URI\n");
|
|
return(NULL);
|
|
}
|
|
len = 0;
|
|
|
|
if (uri->scheme != NULL) {
|
|
p = uri->scheme;
|
|
while (*p != 0) {
|
|
if (len >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len++] = *p++;
|
|
}
|
|
if (len >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len++] = ':';
|
|
}
|
|
if (uri->opaque != NULL) {
|
|
p = uri->opaque;
|
|
while (*p != 0) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
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) || (uri->port == -1)) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len++] = '/';
|
|
ret[len++] = '/';
|
|
if (uri->user != NULL) {
|
|
p = uri->user;
|
|
while (*p != 0) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
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 = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len++] = '@';
|
|
}
|
|
if (uri->server != NULL) {
|
|
p = uri->server;
|
|
while (*p != 0) {
|
|
if (len >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len++] = *p++;
|
|
}
|
|
if (uri->port > 0) {
|
|
if (len + 10 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
len += snprintf((char *) &ret[len], max - len, ":%d", uri->port);
|
|
}
|
|
}
|
|
} else if (uri->authority != NULL) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len++] = '/';
|
|
ret[len++] = '/';
|
|
p = uri->authority;
|
|
while (*p != 0) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
if ((IS_UNRESERVED(*(p))) ||
|
|
((*(p) == '$')) || ((*(p) == ',')) || ((*(p) == ';')) ||
|
|
((*(p) == ':')) || ((*(p) == '@')) || ((*(p) == '&')) ||
|
|
((*(p) == '=')) || ((*(p) == '+')))
|
|
ret[len++] = *p++;
|
|
else {
|
|
int val = *(unsigned char *)p++;
|
|
int hi = val / 0x10, lo = val % 0x10;
|
|
ret[len++] = '%';
|
|
ret[len++] = hi + (hi > 9? 'A'-10 : '0');
|
|
ret[len++] = lo + (lo > 9? 'A'-10 : '0');
|
|
}
|
|
}
|
|
} else if (uri->scheme != NULL) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
}
|
|
if (uri->path != NULL) {
|
|
p = uri->path;
|
|
/*
|
|
* the colon in file:///d: should not be escaped or
|
|
* Windows accesses fail later.
|
|
*/
|
|
if ((uri->scheme != NULL) &&
|
|
(p[0] == '/') &&
|
|
(((p[1] >= 'a') && (p[1] <= 'z')) ||
|
|
((p[1] >= 'A') && (p[1] <= 'Z'))) &&
|
|
(p[2] == ':') &&
|
|
(xmlStrEqual(BAD_CAST uri->scheme, BAD_CAST "file"))) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len++] = *p++;
|
|
ret[len++] = *p++;
|
|
ret[len++] = *p++;
|
|
}
|
|
while (*p != 0) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
if ((IS_UNRESERVED(*(p))) || ((*(p) == '/')) ||
|
|
((*(p) == ';')) || ((*(p) == '@')) || ((*(p) == '&')) ||
|
|
((*(p) == '=')) || ((*(p) == '+')) || ((*(p) == '$')) ||
|
|
((*(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_raw != NULL) {
|
|
if (len + 1 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len++] = '?';
|
|
p = uri->query_raw;
|
|
while (*p != 0) {
|
|
if (len + 1 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len++] = *p++;
|
|
}
|
|
} else if (uri->query != NULL) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len++] = '?';
|
|
p = uri->query;
|
|
while (*p != 0) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
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 (uri->fragment != NULL) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len++] = '#';
|
|
p = uri->fragment;
|
|
while (*p != 0) {
|
|
if (len + 3 >= max) {
|
|
temp = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
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 = xmlSaveUriRealloc(ret, &max);
|
|
if (temp == NULL) goto mem_error;
|
|
ret = temp;
|
|
}
|
|
ret[len] = 0;
|
|
return(ret);
|
|
|
|
mem_error:
|
|
xmlFree(ret);
|
|
return(NULL);
|
|
}
|
|
|
|
/**
|
|
* xmlPrintURI:
|
|
* @stream: a FILE* for the output
|
|
* @uri: pointer to an xmlURI
|
|
*
|
|
* Prints the URI in the stream @stream.
|
|
*/
|
|
void
|
|
xmlPrintURI(FILE *stream, xmlURIPtr uri) {
|
|
xmlChar *out;
|
|
|
|
out = xmlSaveUri(uri);
|
|
if (out != NULL) {
|
|
fprintf(stream, "%s", (char *) out);
|
|
xmlFree(out);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* xmlCleanURI:
|
|
* @uri: pointer to an xmlURI
|
|
*
|
|
* Make sure the xmlURI struct is free of content
|
|
*/
|
|
static void
|
|
xmlCleanURI(xmlURIPtr uri) {
|
|
if (uri == NULL) return;
|
|
|
|
if (uri->scheme != NULL) xmlFree(uri->scheme);
|
|
uri->scheme = NULL;
|
|
if (uri->server != NULL) xmlFree(uri->server);
|
|
uri->server = NULL;
|
|
if (uri->user != NULL) xmlFree(uri->user);
|
|
uri->user = NULL;
|
|
if (uri->path != NULL) xmlFree(uri->path);
|
|
uri->path = NULL;
|
|
if (uri->fragment != NULL) xmlFree(uri->fragment);
|
|
uri->fragment = NULL;
|
|
if (uri->opaque != NULL) xmlFree(uri->opaque);
|
|
uri->opaque = NULL;
|
|
if (uri->authority != NULL) xmlFree(uri->authority);
|
|
uri->authority = NULL;
|
|
if (uri->query != NULL) xmlFree(uri->query);
|
|
uri->query = NULL;
|
|
if (uri->query_raw != NULL) xmlFree(uri->query_raw);
|
|
uri->query_raw = NULL;
|
|
}
|
|
|
|
/**
|
|
* xmlFreeURI:
|
|
* @uri: pointer to an xmlURI
|
|
*
|
|
* Free up the xmlURI struct
|
|
*/
|
|
void
|
|
xmlFreeURI(xmlURIPtr uri) {
|
|
if (uri == NULL) return;
|
|
|
|
if (uri->scheme != NULL) xmlFree(uri->scheme);
|
|
if (uri->server != NULL) xmlFree(uri->server);
|
|
if (uri->user != NULL) xmlFree(uri->user);
|
|
if (uri->path != NULL) xmlFree(uri->path);
|
|
if (uri->fragment != NULL) xmlFree(uri->fragment);
|
|
if (uri->opaque != NULL) xmlFree(uri->opaque);
|
|
if (uri->authority != NULL) xmlFree(uri->authority);
|
|
if (uri->query != NULL) xmlFree(uri->query);
|
|
if (uri->query_raw != NULL) xmlFree(uri->query_raw);
|
|
xmlFree(uri);
|
|
}
|
|
|
|
/************************************************************************
|
|
* *
|
|
* Helper functions *
|
|
* *
|
|
************************************************************************/
|
|
|
|
/**
|
|
* xmlNormalizeURIPath:
|
|
* @path: pointer to the path string
|
|
*
|
|
* Applies the 5 normalization steps to a path string--that is, RFC 2396
|
|
* Section 5.2, steps 6.c through 6.g.
|
|
*
|
|
* Normalization occurs directly on the string, no new allocation is done
|
|
*
|
|
* Returns 0 or an error code
|
|
*/
|
|
int
|
|
xmlNormalizeURIPath(char *path) {
|
|
char *cur, *out;
|
|
|
|
if (path == NULL)
|
|
return(-1);
|
|
|
|
/* Skip all initial "/" chars. We want to get to the beginning of the
|
|
* first non-empty segment.
|
|
*/
|
|
cur = path;
|
|
while (cur[0] == '/')
|
|
++cur;
|
|
if (cur[0] == '\0')
|
|
return(0);
|
|
|
|
/* Keep everything we've seen so far. */
|
|
out = cur;
|
|
|
|
/*
|
|
* Analyze each segment in sequence for cases (c) and (d).
|
|
*/
|
|
while (cur[0] != '\0') {
|
|
/*
|
|
* c) All occurrences of "./", where "." is a complete path segment,
|
|
* are removed from the buffer string.
|
|
*/
|
|
if ((cur[0] == '.') && (cur[1] == '/')) {
|
|
cur += 2;
|
|
/* '//' normalization should be done at this point too */
|
|
while (cur[0] == '/')
|
|
cur++;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* d) If the buffer string ends with "." as a complete path segment,
|
|
* that "." is removed.
|
|
*/
|
|
if ((cur[0] == '.') && (cur[1] == '\0'))
|
|
break;
|
|
|
|
/* Otherwise keep the segment. */
|
|
while (cur[0] != '/') {
|
|
if (cur[0] == '\0')
|
|
goto done_cd;
|
|
(out++)[0] = (cur++)[0];
|
|
}
|
|
/* normalize // */
|
|
while ((cur[0] == '/') && (cur[1] == '/'))
|
|
cur++;
|
|
|
|
(out++)[0] = (cur++)[0];
|
|
}
|
|
done_cd:
|
|
out[0] = '\0';
|
|
|
|
/* Reset to the beginning of the first segment for the next sequence. */
|
|
cur = path;
|
|
while (cur[0] == '/')
|
|
++cur;
|
|
if (cur[0] == '\0')
|
|
return(0);
|
|
|
|
/*
|
|
* Analyze each segment in sequence for cases (e) and (f).
|
|
*
|
|
* 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.
|
|
*
|
|
* f) If the buffer string ends with "<segment>/..", where <segment>
|
|
* is a complete path segment not equal to "..", that
|
|
* "<segment>/.." is removed.
|
|
*
|
|
* To satisfy the "iterative" clause in (e), we need to collapse the
|
|
* string every time we find something that needs to be removed. Thus,
|
|
* we don't need to keep two pointers into the string: we only need a
|
|
* "current position" pointer.
|
|
*/
|
|
while (1) {
|
|
char *segp, *tmp;
|
|
|
|
/* At the beginning of each iteration of this loop, "cur" points to
|
|
* the first character of the segment we want to examine.
|
|
*/
|
|
|
|
/* Find the end of the current segment. */
|
|
segp = cur;
|
|
while ((segp[0] != '/') && (segp[0] != '\0'))
|
|
++segp;
|
|
|
|
/* If this is the last segment, we're done (we need at least two
|
|
* segments to meet the criteria for the (e) and (f) cases).
|
|
*/
|
|
if (segp[0] == '\0')
|
|
break;
|
|
|
|
/* If the first segment is "..", or if the next segment _isn't_ "..",
|
|
* keep this segment and try the next one.
|
|
*/
|
|
++segp;
|
|
if (((cur[0] == '.') && (cur[1] == '.') && (segp == cur+3))
|
|
|| ((segp[0] != '.') || (segp[1] != '.')
|
|
|| ((segp[2] != '/') && (segp[2] != '\0')))) {
|
|
cur = segp;
|
|
continue;
|
|
}
|
|
|
|
/* If we get here, remove this segment and the next one and back up
|
|
* to the previous segment (if there is one), to implement the
|
|
* "iteratively" clause. It's pretty much impossible to back up
|
|
* while maintaining two pointers into the buffer, so just compact
|
|
* the whole buffer now.
|
|
*/
|
|
|
|
/* If this is the end of the buffer, we're done. */
|
|
if (segp[2] == '\0') {
|
|
cur[0] = '\0';
|
|
break;
|
|
}
|
|
/* Valgrind complained, strcpy(cur, segp + 3); */
|
|
/* string will overlap, do not use strcpy */
|
|
tmp = cur;
|
|
segp += 3;
|
|
while ((*tmp++ = *segp++) != 0)
|
|
;
|
|
|
|
/* If there are no previous segments, then keep going from here. */
|
|
segp = cur;
|
|
while ((segp > path) && ((--segp)[0] == '/'))
|
|
;
|
|
if (segp == path)
|
|
continue;
|
|
|
|
/* "segp" is pointing to the end of a previous segment; find it's
|
|
* start. We need to back up to the previous segment and start
|
|
* over with that to handle things like "foo/bar/../..". If we
|
|
* don't do this, then on the first pass we'll remove the "bar/..",
|
|
* but be pointing at the second ".." so we won't realize we can also
|
|
* remove the "foo/..".
|
|
*/
|
|
cur = segp;
|
|
while ((cur > path) && (cur[-1] != '/'))
|
|
--cur;
|
|
}
|
|
out[0] = '\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.
|
|
*/
|
|
if (path[0] == '/') {
|
|
cur = path;
|
|
while ((cur[0] == '/') && (cur[1] == '.') && (cur[2] == '.')
|
|
&& ((cur[3] == '/') || (cur[3] == '\0')))
|
|
cur += 3;
|
|
|
|
if (cur != path) {
|
|
out = path;
|
|
while (cur[0] != '\0')
|
|
(out++)[0] = (cur++)[0];
|
|
out[0] = 0;
|
|
}
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|
|
static int is_hex(char c) {
|
|
if (((c >= '0') && (c <= '9')) ||
|
|
((c >= 'a') && (c <= 'f')) ||
|
|
((c >= 'A') && (c <= 'F')))
|
|
return(1);
|
|
return(0);
|
|
}
|
|
|
|
/**
|
|
* xmlURIUnescapeString:
|
|
* @str: the string to unescape
|
|
* @len: the length in bytes to unescape (or <= 0 to indicate full string)
|
|
* @target: optional destination buffer
|
|
*
|
|
* Unescaping routine, but does not check that the string is an URI. The
|
|
* output is a direct unsigned char translation of %XX values (no encoding)
|
|
* Note that the length of the result can only be smaller or same size as
|
|
* the input string.
|
|
*
|
|
* Returns a copy of the string, but unescaped, will return NULL only in case
|
|
* of error
|
|
*/
|
|
char *
|
|
xmlURIUnescapeString(const char *str, int len, char *target) {
|
|
char *ret, *out;
|
|
const char *in;
|
|
|
|
if (str == NULL)
|
|
return(NULL);
|
|
if (len <= 0) len = strlen(str);
|
|
if (len < 0) return(NULL);
|
|
|
|
if (target == NULL) {
|
|
ret = (char *) xmlMallocAtomic(len + 1);
|
|
if (ret == NULL) {
|
|
xmlURIErrMemory("unescaping URI value\n");
|
|
return(NULL);
|
|
}
|
|
} else
|
|
ret = target;
|
|
in = str;
|
|
out = ret;
|
|
while(len > 0) {
|
|
if ((len > 2) && (*in == '%') && (is_hex(in[1])) && (is_hex(in[2]))) {
|
|
in++;
|
|
if ((*in >= '0') && (*in <= '9'))
|
|
*out = (*in - '0');
|
|
else if ((*in >= 'a') && (*in <= 'f'))
|
|
*out = (*in - 'a') + 10;
|
|
else if ((*in >= 'A') && (*in <= 'F'))
|
|
*out = (*in - 'A') + 10;
|
|
in++;
|
|
if ((*in >= '0') && (*in <= '9'))
|
|
*out = *out * 16 + (*in - '0');
|
|
else if ((*in >= 'a') && (*in <= 'f'))
|
|
*out = *out * 16 + (*in - 'a') + 10;
|
|
else if ((*in >= 'A') && (*in <= 'F'))
|
|
*out = *out * 16 + (*in - 'A') + 10;
|
|
in++;
|
|
len -= 3;
|
|
out++;
|
|
} else {
|
|
*out++ = *in++;
|
|
len--;
|
|
}
|
|
}
|
|
*out = 0;
|
|
return(ret);
|
|
}
|
|
|
|
/**
|
|
* xmlURIEscapeStr:
|
|
* @str: string to escape
|
|
* @list: exception list string of chars not to escape
|
|
*
|
|
* This routine escapes a string to hex, ignoring reserved characters (a-z)
|
|
* and the characters in the exception list.
|
|
*
|
|
* Returns a new escaped string or NULL in case of error.
|
|
*/
|
|
xmlChar *
|
|
xmlURIEscapeStr(const xmlChar *str, const xmlChar *list) {
|
|
xmlChar *ret, ch;
|
|
xmlChar *temp;
|
|
const xmlChar *in;
|
|
int len, out;
|
|
|
|
if (str == NULL)
|
|
return(NULL);
|
|
if (str[0] == 0)
|
|
return(xmlStrdup(str));
|
|
len = xmlStrlen(str);
|
|
if (!(len > 0)) return(NULL);
|
|
|
|
len += 20;
|
|
ret = (xmlChar *) xmlMallocAtomic(len);
|
|
if (ret == NULL) {
|
|
xmlURIErrMemory("escaping URI value\n");
|
|
return(NULL);
|
|
}
|
|
in = (const xmlChar *) str;
|
|
out = 0;
|
|
while(*in != 0) {
|
|
if (len - out <= 3) {
|
|
temp = xmlSaveUriRealloc(ret, &len);
|
|
if (temp == NULL) {
|
|
xmlURIErrMemory("escaping URI value\n");
|
|
xmlFree(ret);
|
|
return(NULL);
|
|
}
|
|
ret = temp;
|
|
}
|
|
|
|
ch = *in;
|
|
|
|
if ((ch != '@') && (!IS_UNRESERVED(ch)) && (!xmlStrchr(list, ch))) {
|
|
unsigned char val;
|
|
ret[out++] = '%';
|
|
val = ch >> 4;
|
|
if (val <= 9)
|
|
ret[out++] = '0' + val;
|
|
else
|
|
ret[out++] = 'A' + val - 0xA;
|
|
val = ch & 0xF;
|
|
if (val <= 9)
|
|
ret[out++] = '0' + val;
|
|
else
|
|
ret[out++] = 'A' + val - 0xA;
|
|
in++;
|
|
} else {
|
|
ret[out++] = *in++;
|
|
}
|
|
|
|
}
|
|
ret[out] = 0;
|
|
return(ret);
|
|
}
|
|
|
|
/**
|
|
* xmlURIEscape:
|
|
* @str: the string of the URI to escape
|
|
*
|
|
* Escaping routine, does not do validity checks !
|
|
* It will try to escape the chars needing this, but this is heuristic
|
|
* based it's impossible to be sure.
|
|
*
|
|
* Returns an copy of the string, but escaped
|
|
*
|
|
* 25 May 2001
|
|
* Uses xmlParseURI and xmlURIEscapeStr to try to escape correctly
|
|
* according to RFC2396.
|
|
* - Carl Douglas
|
|
*/
|
|
xmlChar *
|
|
xmlURIEscape(const xmlChar * str)
|
|
{
|
|
xmlChar *ret, *segment = NULL;
|
|
xmlURIPtr uri;
|
|
int ret2;
|
|
|
|
#define NULLCHK(p) if(!p) { \
|
|
xmlURIErrMemory("escaping URI value\n"); \
|
|
xmlFreeURI(uri); \
|
|
return NULL; } \
|
|
|
|
if (str == NULL)
|
|
return (NULL);
|
|
|
|
uri = xmlCreateURI();
|
|
if (uri != NULL) {
|
|
/*
|
|
* Allow escaping errors in the unescaped form
|
|
*/
|
|
uri->cleanup = 1;
|
|
ret2 = xmlParseURIReference(uri, (const char *)str);
|
|
if (ret2) {
|
|
xmlFreeURI(uri);
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
if (!uri)
|
|
return NULL;
|
|
|
|
ret = NULL;
|
|
|
|
if (uri->scheme) {
|
|
segment = xmlURIEscapeStr(BAD_CAST uri->scheme, BAD_CAST "+-.");
|
|
NULLCHK(segment)
|
|
ret = xmlStrcat(ret, segment);
|
|
ret = xmlStrcat(ret, BAD_CAST ":");
|
|
xmlFree(segment);
|
|
}
|
|
|
|
if (uri->authority) {
|
|
segment =
|
|
xmlURIEscapeStr(BAD_CAST uri->authority, BAD_CAST "/?;:@");
|
|
NULLCHK(segment)
|
|
ret = xmlStrcat(ret, BAD_CAST "//");
|
|
ret = xmlStrcat(ret, segment);
|
|
xmlFree(segment);
|
|
}
|
|
|
|
if (uri->user) {
|
|
segment = xmlURIEscapeStr(BAD_CAST uri->user, BAD_CAST ";:&=+$,");
|
|
NULLCHK(segment)
|
|
ret = xmlStrcat(ret,BAD_CAST "//");
|
|
ret = xmlStrcat(ret, segment);
|
|
ret = xmlStrcat(ret, BAD_CAST "@");
|
|
xmlFree(segment);
|
|
}
|
|
|
|
if (uri->server) {
|
|
segment = xmlURIEscapeStr(BAD_CAST uri->server, BAD_CAST "/?;:@");
|
|
NULLCHK(segment)
|
|
if (uri->user == NULL)
|
|
ret = xmlStrcat(ret, BAD_CAST "//");
|
|
ret = xmlStrcat(ret, segment);
|
|
xmlFree(segment);
|
|
}
|
|
|
|
if (uri->port) {
|
|
xmlChar port[10];
|
|
|
|
snprintf((char *) port, 10, "%d", uri->port);
|
|
ret = xmlStrcat(ret, BAD_CAST ":");
|
|
ret = xmlStrcat(ret, port);
|
|
}
|
|
|
|
if (uri->path) {
|
|
segment =
|
|
xmlURIEscapeStr(BAD_CAST uri->path, BAD_CAST ":@&=+$,/?;");
|
|
NULLCHK(segment)
|
|
ret = xmlStrcat(ret, segment);
|
|
xmlFree(segment);
|
|
}
|
|
|
|
if (uri->query_raw) {
|
|
ret = xmlStrcat(ret, BAD_CAST "?");
|
|
ret = xmlStrcat(ret, BAD_CAST uri->query_raw);
|
|
}
|
|
else if (uri->query) {
|
|
segment =
|
|
xmlURIEscapeStr(BAD_CAST uri->query, BAD_CAST ";/?:@&=+,$");
|
|
NULLCHK(segment)
|
|
ret = xmlStrcat(ret, BAD_CAST "?");
|
|
ret = xmlStrcat(ret, segment);
|
|
xmlFree(segment);
|
|
}
|
|
|
|
if (uri->opaque) {
|
|
segment = xmlURIEscapeStr(BAD_CAST uri->opaque, BAD_CAST "");
|
|
NULLCHK(segment)
|
|
ret = xmlStrcat(ret, segment);
|
|
xmlFree(segment);
|
|
}
|
|
|
|
if (uri->fragment) {
|
|
segment = xmlURIEscapeStr(BAD_CAST uri->fragment, BAD_CAST "#");
|
|
NULLCHK(segment)
|
|
ret = xmlStrcat(ret, BAD_CAST "#");
|
|
ret = xmlStrcat(ret, segment);
|
|
xmlFree(segment);
|
|
}
|
|
|
|
xmlFreeURI(uri);
|
|
#undef NULLCHK
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/************************************************************************
|
|
* *
|
|
* Public functions *
|
|
* *
|
|
************************************************************************/
|
|
|
|
/**
|
|
* xmlBuildURI:
|
|
* @URI: the URI instance found in the document
|
|
* @base: the base value
|
|
*
|
|
* Computes he final URI of the reference done by checking that
|
|
* the given URI is valid, and building the final URI using the
|
|
* base URI. This is processed according to section 5.2 of the
|
|
* RFC 2396
|
|
*
|
|
* 5.2. Resolving Relative References to Absolute Form
|
|
*
|
|
* Returns a new URI string (to be freed by the caller) or NULL in case
|
|
* of error.
|
|
*/
|
|
xmlChar *
|
|
xmlBuildURI(const xmlChar *URI, const xmlChar *base) {
|
|
xmlChar *val = NULL;
|
|
int ret, len, indx, cur, out;
|
|
xmlURIPtr ref = NULL;
|
|
xmlURIPtr bas = NULL;
|
|
xmlURIPtr res = NULL;
|
|
|
|
/*
|
|
* 1) The URI reference is parsed into the potential four components and
|
|
* fragment identifier, as described in Section 4.3.
|
|
*
|
|
* NOTE that a completely empty URI is treated by modern browsers
|
|
* as a reference to "." rather than as a synonym for the current
|
|
* URI. Should we do that here?
|
|
*/
|
|
if (URI == NULL)
|
|
ret = -1;
|
|
else {
|
|
if (*URI) {
|
|
ref = xmlCreateURI();
|
|
if (ref == NULL)
|
|
goto done;
|
|
ret = xmlParseURIReference(ref, (const char *) URI);
|
|
}
|
|
else
|
|
ret = 0;
|
|
}
|
|
if (ret != 0)
|
|
goto done;
|
|
if ((ref != NULL) && (ref->scheme != NULL)) {
|
|
/*
|
|
* The URI is absolute don't modify.
|
|
*/
|
|
val = xmlStrdup(URI);
|
|
goto done;
|
|
}
|
|
if (base == NULL)
|
|
ret = -1;
|
|
else {
|
|
bas = xmlCreateURI();
|
|
if (bas == NULL)
|
|
goto done;
|
|
ret = xmlParseURIReference(bas, (const char *) base);
|
|
}
|
|
if (ret != 0) {
|
|
if (ref)
|
|
val = xmlSaveUri(ref);
|
|
goto done;
|
|
}
|
|
if (ref == NULL) {
|
|
/*
|
|
* the base fragment must be ignored
|
|
*/
|
|
if (bas->fragment != NULL) {
|
|
xmlFree(bas->fragment);
|
|
bas->fragment = NULL;
|
|
}
|
|
val = xmlSaveUri(bas);
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* 2) If the path component is empty and the scheme, authority, and
|
|
* query components are undefined, then it is a reference to the
|
|
* current document and we are done. Otherwise, the reference URI's
|
|
* query and fragment components are defined as found (or not found)
|
|
* within the URI reference and not inherited from the base URI.
|
|
*
|
|
* NOTE that in modern browsers, the parsing differs from the above
|
|
* in the following aspect: the query component is allowed to be
|
|
* defined while still treating this as a reference to the current
|
|
* document.
|
|
*/
|
|
res = xmlCreateURI();
|
|
if (res == NULL)
|
|
goto done;
|
|
if ((ref->scheme == NULL) && (ref->path == NULL) &&
|
|
((ref->authority == NULL) && (ref->server == NULL))) {
|
|
if (bas->scheme != NULL)
|
|
res->scheme = xmlMemStrdup(bas->scheme);
|
|
if (bas->authority != NULL)
|
|
res->authority = xmlMemStrdup(bas->authority);
|
|
else if ((bas->server != NULL) || (bas->port == -1)) {
|
|
if (bas->server != NULL)
|
|
res->server = xmlMemStrdup(bas->server);
|
|
if (bas->user != NULL)
|
|
res->user = xmlMemStrdup(bas->user);
|
|
res->port = bas->port;
|
|
}
|
|
if (bas->path != NULL)
|
|
res->path = xmlMemStrdup(bas->path);
|
|
if (ref->query_raw != NULL)
|
|
res->query_raw = xmlMemStrdup (ref->query_raw);
|
|
else if (ref->query != NULL)
|
|
res->query = xmlMemStrdup(ref->query);
|
|
else if (bas->query_raw != NULL)
|
|
res->query_raw = xmlMemStrdup(bas->query_raw);
|
|
else if (bas->query != NULL)
|
|
res->query = xmlMemStrdup(bas->query);
|
|
if (ref->fragment != NULL)
|
|
res->fragment = xmlMemStrdup(ref->fragment);
|
|
goto step_7;
|
|
}
|
|
|
|
/*
|
|
* 3) If the scheme component is defined, indicating that the reference
|
|
* starts with a scheme name, then the reference is interpreted as an
|
|
* absolute URI and we are done. Otherwise, the reference URI's
|
|
* scheme is inherited from the base URI's scheme component.
|
|
*/
|
|
if (ref->scheme != NULL) {
|
|
val = xmlSaveUri(ref);
|
|
goto done;
|
|
}
|
|
if (bas->scheme != NULL)
|
|
res->scheme = xmlMemStrdup(bas->scheme);
|
|
|
|
if (ref->query_raw != NULL)
|
|
res->query_raw = xmlMemStrdup(ref->query_raw);
|
|
else if (ref->query != NULL)
|
|
res->query = xmlMemStrdup(ref->query);
|
|
if (ref->fragment != NULL)
|
|
res->fragment = xmlMemStrdup(ref->fragment);
|
|
|
|
/*
|
|
* 4) If the authority component is defined, then the reference is a
|
|
* network-path and we skip to step 7. Otherwise, the reference
|
|
* URI's authority is inherited from the base URI's authority
|
|
* component, which will also be undefined if the URI scheme does not
|
|
* use an authority component.
|
|
*/
|
|
if ((ref->authority != NULL) || (ref->server != NULL)) {
|
|
if (ref->authority != NULL)
|
|
res->authority = xmlMemStrdup(ref->authority);
|
|
else {
|
|
res->server = xmlMemStrdup(ref->server);
|
|
if (ref->user != NULL)
|
|
res->user = xmlMemStrdup(ref->user);
|
|
res->port = ref->port;
|
|
}
|
|
if (ref->path != NULL)
|
|
res->path = xmlMemStrdup(ref->path);
|
|
goto step_7;
|
|
}
|
|
if (bas->authority != NULL)
|
|
res->authority = xmlMemStrdup(bas->authority);
|
|
else if ((bas->server != NULL) || (bas->port == -1)) {
|
|
if (bas->server != NULL)
|
|
res->server = xmlMemStrdup(bas->server);
|
|
if (bas->user != NULL)
|
|
res->user = xmlMemStrdup(bas->user);
|
|
res->port = bas->port;
|
|
}
|
|
|
|
/*
|
|
* 5) If the path component begins with a slash character ("/"), then
|
|
* the reference is an absolute-path and we skip to step 7.
|
|
*/
|
|
if ((ref->path != NULL) && (ref->path[0] == '/')) {
|
|
res->path = xmlMemStrdup(ref->path);
|
|
goto step_7;
|
|
}
|
|
|
|
|
|
/*
|
|
* 6) If this step is reached, then we are resolving a relative-path
|
|
* reference. The relative path needs to be merged with the base
|
|
* URI's path. Although there are many ways to do this, we will
|
|
* describe a simple method using a separate string buffer.
|
|
*
|
|
* Allocate a buffer large enough for the result string.
|
|
*/
|
|
len = 2; /* extra / and 0 */
|
|
if (ref->path != NULL)
|
|
len += strlen(ref->path);
|
|
if (bas->path != NULL)
|
|
len += strlen(bas->path);
|
|
res->path = (char *) xmlMallocAtomic(len);
|
|
if (res->path == NULL) {
|
|
xmlURIErrMemory("resolving URI against base\n");
|
|
goto done;
|
|
}
|
|
res->path[0] = 0;
|
|
|
|
/*
|
|
* a) All but the last segment of the base URI's path component is
|
|
* copied to the buffer. In other words, any characters after the
|
|
* last (right-most) slash character, if any, are excluded.
|
|
*/
|
|
cur = 0;
|
|
out = 0;
|
|
if (bas->path != NULL) {
|
|
while (bas->path[cur] != 0) {
|
|
while ((bas->path[cur] != 0) && (bas->path[cur] != '/'))
|
|
cur++;
|
|
if (bas->path[cur] == 0)
|
|
break;
|
|
|
|
cur++;
|
|
while (out < cur) {
|
|
res->path[out] = bas->path[out];
|
|
out++;
|
|
}
|
|
}
|
|
}
|
|
res->path[out] = 0;
|
|
|
|
/*
|
|
* b) The reference's path component is appended to the buffer
|
|
* string.
|
|
*/
|
|
if (ref->path != NULL && ref->path[0] != 0) {
|
|
indx = 0;
|
|
/*
|
|
* Ensure the path includes a '/'
|
|
*/
|
|
if ((out == 0) && (bas->server != NULL))
|
|
res->path[out++] = '/';
|
|
while (ref->path[indx] != 0) {
|
|
res->path[out++] = ref->path[indx++];
|
|
}
|
|
}
|
|
res->path[out] = 0;
|
|
|
|
/*
|
|
* Steps c) to h) are really path normalization steps
|
|
*/
|
|
xmlNormalizeURIPath(res->path);
|
|
|
|
step_7:
|
|
|
|
/*
|
|
* 7) The resulting URI components, including any inherited from the
|
|
* base URI, are recombined to give the absolute form of the URI
|
|
* reference.
|
|
*/
|
|
val = xmlSaveUri(res);
|
|
|
|
done:
|
|
if (ref != NULL)
|
|
xmlFreeURI(ref);
|
|
if (bas != NULL)
|
|
xmlFreeURI(bas);
|
|
if (res != NULL)
|
|
xmlFreeURI(res);
|
|
return(val);
|
|
}
|
|
|
|
/**
|
|
* xmlBuildRelativeURI:
|
|
* @URI: the URI reference under consideration
|
|
* @base: the base value
|
|
*
|
|
* Expresses the URI of the reference in terms relative to the
|
|
* base. Some examples of this operation include:
|
|
* base = "http://site1.com/docs/book1.html"
|
|
* URI input URI returned
|
|
* docs/pic1.gif pic1.gif
|
|
* docs/img/pic1.gif img/pic1.gif
|
|
* img/pic1.gif ../img/pic1.gif
|
|
* http://site1.com/docs/pic1.gif pic1.gif
|
|
* http://site2.com/docs/pic1.gif http://site2.com/docs/pic1.gif
|
|
*
|
|
* base = "docs/book1.html"
|
|
* URI input URI returned
|
|
* docs/pic1.gif pic1.gif
|
|
* docs/img/pic1.gif img/pic1.gif
|
|
* img/pic1.gif ../img/pic1.gif
|
|
* http://site1.com/docs/pic1.gif http://site1.com/docs/pic1.gif
|
|
*
|
|
*
|
|
* Note: if the URI reference is really weird or complicated, it may be
|
|
* worthwhile to first convert it into a "nice" one by calling
|
|
* xmlBuildURI (using 'base') before calling this routine,
|
|
* since this routine (for reasonable efficiency) assumes URI has
|
|
* already been through some validation.
|
|
*
|
|
* Returns a new URI string (to be freed by the caller) or NULL in case
|
|
* error.
|
|
*/
|
|
xmlChar *
|
|
xmlBuildRelativeURI (const xmlChar * URI, const xmlChar * base)
|
|
{
|
|
xmlChar *val = NULL;
|
|
int ret;
|
|
int ix;
|
|
int nbslash = 0;
|
|
int len;
|
|
xmlURIPtr ref = NULL;
|
|
xmlURIPtr bas = NULL;
|
|
xmlChar *bptr, *uptr, *vptr;
|
|
int remove_path = 0;
|
|
|
|
if ((URI == NULL) || (*URI == 0))
|
|
return NULL;
|
|
|
|
/*
|
|
* First parse URI into a standard form
|
|
*/
|
|
ref = xmlCreateURI ();
|
|
if (ref == NULL)
|
|
return NULL;
|
|
/* If URI not already in "relative" form */
|
|
if (URI[0] != '.') {
|
|
ret = xmlParseURIReference (ref, (const char *) URI);
|
|
if (ret != 0)
|
|
goto done; /* Error in URI, return NULL */
|
|
} else
|
|
ref->path = (char *)xmlStrdup(URI);
|
|
|
|
/*
|
|
* Next parse base into the same standard form
|
|
*/
|
|
if ((base == NULL) || (*base == 0)) {
|
|
val = xmlStrdup (URI);
|
|
goto done;
|
|
}
|
|
bas = xmlCreateURI ();
|
|
if (bas == NULL)
|
|
goto done;
|
|
if (base[0] != '.') {
|
|
ret = xmlParseURIReference (bas, (const char *) base);
|
|
if (ret != 0)
|
|
goto done; /* Error in base, return NULL */
|
|
} else
|
|
bas->path = (char *)xmlStrdup(base);
|
|
|
|
/*
|
|
* If the scheme / server on the URI differs from the base,
|
|
* just return the URI
|
|
*/
|
|
if ((ref->scheme != NULL) &&
|
|
((bas->scheme == NULL) ||
|
|
(xmlStrcmp ((xmlChar *)bas->scheme, (xmlChar *)ref->scheme)) ||
|
|
(xmlStrcmp ((xmlChar *)bas->server, (xmlChar *)ref->server)))) {
|
|
val = xmlStrdup (URI);
|
|
goto done;
|
|
}
|
|
if (xmlStrEqual((xmlChar *)bas->path, (xmlChar *)ref->path)) {
|
|
val = xmlStrdup(BAD_CAST "");
|
|
goto done;
|
|
}
|
|
if (bas->path == NULL) {
|
|
val = xmlStrdup((xmlChar *)ref->path);
|
|
goto done;
|
|
}
|
|
if (ref->path == NULL) {
|
|
ref->path = (char *) "/";
|
|
remove_path = 1;
|
|
}
|
|
|
|
/*
|
|
* At this point (at last!) we can compare the two paths
|
|
*
|
|
* First we take care of the special case where either of the
|
|
* two path components may be missing (bug 316224)
|
|
*/
|
|
bptr = (xmlChar *)bas->path;
|
|
{
|
|
xmlChar *rptr = (xmlChar *) ref->path;
|
|
int pos = 0;
|
|
|
|
/*
|
|
* Next we compare the two strings and find where they first differ
|
|
*/
|
|
if ((*rptr == '.') && (rptr[1] == '/'))
|
|
rptr += 2;
|
|
if ((*bptr == '.') && (bptr[1] == '/'))
|
|
bptr += 2;
|
|
else if ((*bptr == '/') && (*rptr != '/'))
|
|
bptr++;
|
|
while ((bptr[pos] == rptr[pos]) && (bptr[pos] != 0))
|
|
pos++;
|
|
|
|
if (bptr[pos] == rptr[pos]) {
|
|
val = xmlStrdup(BAD_CAST "");
|
|
goto done; /* (I can't imagine why anyone would do this) */
|
|
}
|
|
|
|
/*
|
|
* In URI, "back up" to the last '/' encountered. This will be the
|
|
* beginning of the "unique" suffix of URI
|
|
*/
|
|
ix = pos;
|
|
for (; ix > 0; ix--) {
|
|
if (rptr[ix - 1] == '/')
|
|
break;
|
|
}
|
|
uptr = (xmlChar *)&rptr[ix];
|
|
|
|
/*
|
|
* In base, count the number of '/' from the differing point
|
|
*/
|
|
for (; bptr[ix] != 0; ix++) {
|
|
if (bptr[ix] == '/')
|
|
nbslash++;
|
|
}
|
|
|
|
/*
|
|
* e.g: URI="foo/" base="foo/bar" -> "./"
|
|
*/
|
|
if (nbslash == 0 && !uptr[0]) {
|
|
val = xmlStrdup(BAD_CAST "./");
|
|
goto done;
|
|
}
|
|
|
|
len = xmlStrlen (uptr) + 1;
|
|
}
|
|
|
|
if (nbslash == 0) {
|
|
if (uptr != NULL)
|
|
/* exception characters from xmlSaveUri */
|
|
val = xmlURIEscapeStr(uptr, BAD_CAST "/;&=+$,");
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Allocate just enough space for the returned string -
|
|
* length of the remainder of the URI, plus enough space
|
|
* for the "../" groups, plus one for the terminator
|
|
*/
|
|
val = (xmlChar *) xmlMalloc (len + 3 * nbslash);
|
|
if (val == NULL) {
|
|
xmlURIErrMemory("building relative URI\n");
|
|
goto done;
|
|
}
|
|
vptr = val;
|
|
/*
|
|
* Put in as many "../" as needed
|
|
*/
|
|
for (; nbslash>0; nbslash--) {
|
|
*vptr++ = '.';
|
|
*vptr++ = '.';
|
|
*vptr++ = '/';
|
|
}
|
|
/*
|
|
* Finish up with the end of the URI
|
|
*/
|
|
if (uptr != NULL) {
|
|
if ((vptr > val) && (len > 0) &&
|
|
(uptr[0] == '/') && (vptr[-1] == '/')) {
|
|
memcpy (vptr, uptr + 1, len - 1);
|
|
vptr[len - 2] = 0;
|
|
} else {
|
|
memcpy (vptr, uptr, len);
|
|
vptr[len - 1] = 0;
|
|
}
|
|
} else {
|
|
vptr[len - 1] = 0;
|
|
}
|
|
|
|
/* escape the freshly-built path */
|
|
vptr = val;
|
|
/* exception characters from xmlSaveUri */
|
|
val = xmlURIEscapeStr(vptr, BAD_CAST "/;&=+$,");
|
|
xmlFree(vptr);
|
|
|
|
done:
|
|
/*
|
|
* Free the working variables
|
|
*/
|
|
if (remove_path != 0)
|
|
ref->path = NULL;
|
|
if (ref != NULL)
|
|
xmlFreeURI (ref);
|
|
if (bas != NULL)
|
|
xmlFreeURI (bas);
|
|
|
|
return val;
|
|
}
|
|
|
|
/**
|
|
* xmlCanonicPath:
|
|
* @path: the resource locator in a filesystem notation
|
|
*
|
|
* Constructs a canonic path from the specified path.
|
|
*
|
|
* Returns a new canonic path, or a duplicate of the path parameter if the
|
|
* construction fails. The caller is responsible for freeing the memory occupied
|
|
* by the returned string. If there is insufficient memory available, or the
|
|
* argument is NULL, the function returns NULL.
|
|
*/
|
|
#define IS_WINDOWS_PATH(p) \
|
|
((p != NULL) && \
|
|
(((p[0] >= 'a') && (p[0] <= 'z')) || \
|
|
((p[0] >= 'A') && (p[0] <= 'Z'))) && \
|
|
(p[1] == ':') && ((p[2] == '/') || (p[2] == '\\')))
|
|
xmlChar *
|
|
xmlCanonicPath(const xmlChar *path)
|
|
{
|
|
/*
|
|
* For Windows implementations, additional work needs to be done to
|
|
* replace backslashes in pathnames with "forward slashes"
|
|
*/
|
|
#if defined(_WIN32) && !defined(__CYGWIN__)
|
|
int len = 0;
|
|
char *p = NULL;
|
|
#endif
|
|
xmlURIPtr uri;
|
|
xmlChar *ret;
|
|
const xmlChar *absuri;
|
|
|
|
if (path == NULL)
|
|
return(NULL);
|
|
|
|
#if defined(_WIN32)
|
|
/*
|
|
* We must not change the backslashes to slashes if the the path
|
|
* starts with \\?\
|
|
* Those paths can be up to 32k characters long.
|
|
* Was added specifically for OpenOffice, those paths can't be converted
|
|
* to URIs anyway.
|
|
*/
|
|
if ((path[0] == '\\') && (path[1] == '\\') && (path[2] == '?') &&
|
|
(path[3] == '\\') )
|
|
return xmlStrdup((const xmlChar *) path);
|
|
#endif
|
|
|
|
/* sanitize filename starting with // so it can be used as URI */
|
|
if ((path[0] == '/') && (path[1] == '/') && (path[2] != '/'))
|
|
path++;
|
|
|
|
if ((uri = xmlParseURI((const char *) path)) != NULL) {
|
|
xmlFreeURI(uri);
|
|
return xmlStrdup(path);
|
|
}
|
|
|
|
/* Check if this is an "absolute uri" */
|
|
absuri = xmlStrstr(path, BAD_CAST "://");
|
|
if (absuri != NULL) {
|
|
int l, j;
|
|
unsigned char c;
|
|
xmlChar *escURI;
|
|
|
|
/*
|
|
* this looks like an URI where some parts have not been
|
|
* escaped leading to a parsing problem. Check that the first
|
|
* part matches a protocol.
|
|
*/
|
|
l = absuri - path;
|
|
/* Bypass if first part (part before the '://') is > 20 chars */
|
|
if ((l <= 0) || (l > 20))
|
|
goto path_processing;
|
|
/* Bypass if any non-alpha characters are present in first part */
|
|
for (j = 0;j < l;j++) {
|
|
c = path[j];
|
|
if (!(((c >= 'a') && (c <= 'z')) || ((c >= 'A') && (c <= 'Z'))))
|
|
goto path_processing;
|
|
}
|
|
|
|
/* Escape all except the characters specified in the supplied path */
|
|
escURI = xmlURIEscapeStr(path, BAD_CAST ":/?_.#&;=");
|
|
if (escURI != NULL) {
|
|
/* Try parsing the escaped path */
|
|
uri = xmlParseURI((const char *) escURI);
|
|
/* If successful, return the escaped string */
|
|
if (uri != NULL) {
|
|
xmlFreeURI(uri);
|
|
return escURI;
|
|
}
|
|
xmlFree(escURI);
|
|
}
|
|
}
|
|
|
|
path_processing:
|
|
/* For Windows implementations, replace backslashes with 'forward slashes' */
|
|
#if defined(_WIN32) && !defined(__CYGWIN__)
|
|
/*
|
|
* Create a URI structure
|
|
*/
|
|
uri = xmlCreateURI();
|
|
if (uri == NULL) { /* Guard against 'out of memory' */
|
|
return(NULL);
|
|
}
|
|
|
|
len = xmlStrlen(path);
|
|
if ((len > 2) && IS_WINDOWS_PATH(path)) {
|
|
/* make the scheme 'file' */
|
|
uri->scheme = (char *) xmlStrdup(BAD_CAST "file");
|
|
/* allocate space for leading '/' + path + string terminator */
|
|
uri->path = xmlMallocAtomic(len + 2);
|
|
if (uri->path == NULL) {
|
|
xmlFreeURI(uri); /* Guard against 'out of memory' */
|
|
return(NULL);
|
|
}
|
|
/* Put in leading '/' plus path */
|
|
uri->path[0] = '/';
|
|
p = uri->path + 1;
|
|
strncpy(p, (char *) path, len + 1);
|
|
} else {
|
|
uri->path = (char *) xmlStrdup(path);
|
|
if (uri->path == NULL) {
|
|
xmlFreeURI(uri);
|
|
return(NULL);
|
|
}
|
|
p = uri->path;
|
|
}
|
|
/* Now change all occurrences of '\' to '/' */
|
|
while (*p != '\0') {
|
|
if (*p == '\\')
|
|
*p = '/';
|
|
p++;
|
|
}
|
|
|
|
if (uri->scheme == NULL) {
|
|
ret = xmlStrdup((const xmlChar *) uri->path);
|
|
} else {
|
|
ret = xmlSaveUri(uri);
|
|
}
|
|
|
|
xmlFreeURI(uri);
|
|
#else
|
|
ret = xmlStrdup((const xmlChar *) path);
|
|
#endif
|
|
return(ret);
|
|
}
|
|
|
|
/**
|
|
* xmlPathToURI:
|
|
* @path: the resource locator in a filesystem notation
|
|
*
|
|
* Constructs an URI expressing the existing path
|
|
*
|
|
* Returns a new URI, or a duplicate of the path parameter if the
|
|
* construction fails. The caller is responsible for freeing the memory
|
|
* occupied by the returned string. If there is insufficient memory available,
|
|
* or the argument is NULL, the function returns NULL.
|
|
*/
|
|
xmlChar *
|
|
xmlPathToURI(const xmlChar *path)
|
|
{
|
|
xmlURIPtr uri;
|
|
xmlURI temp;
|
|
xmlChar *ret, *cal;
|
|
|
|
if (path == NULL)
|
|
return(NULL);
|
|
|
|
if ((uri = xmlParseURI((const char *) path)) != NULL) {
|
|
xmlFreeURI(uri);
|
|
return xmlStrdup(path);
|
|
}
|
|
cal = xmlCanonicPath(path);
|
|
if (cal == NULL)
|
|
return(NULL);
|
|
#if defined(_WIN32) && !defined(__CYGWIN__)
|
|
/* xmlCanonicPath can return an URI on Windows (is that the intended behaviour?)
|
|
If 'cal' is a valid URI already then we are done here, as continuing would make
|
|
it invalid. */
|
|
if ((uri = xmlParseURI((const char *) cal)) != NULL) {
|
|
xmlFreeURI(uri);
|
|
return cal;
|
|
}
|
|
/* 'cal' can contain a relative path with backslashes. If that is processed
|
|
by xmlSaveURI, they will be escaped and the external entity loader machinery
|
|
will fail. So convert them to slashes. Misuse 'ret' for walking. */
|
|
ret = cal;
|
|
while (*ret != '\0') {
|
|
if (*ret == '\\')
|
|
*ret = '/';
|
|
ret++;
|
|
}
|
|
#endif
|
|
memset(&temp, 0, sizeof(temp));
|
|
temp.path = (char *) cal;
|
|
ret = xmlSaveUri(&temp);
|
|
xmlFree(cal);
|
|
return(ret);
|
|
}
|
|
#define bottom_uri
|
|
#include "elfgcchack.h"
|