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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsURLHelper_h__
#define nsURLHelper_h__
#include "nsString.h"
class nsIFile;
class nsIURLParser;
enum netCoalesceFlags
{
NET_COALESCE_NORMAL = 0,
/**
* retains /../ that reach above dir root (useful for FTP
* servers in which the root of the FTP URL is not necessarily
* the root of the FTP filesystem).
*/
NET_COALESCE_ALLOW_RELATIVE_ROOT = 1<<0,
/**
* recognizes /%2F and // as markers for the root directory
* and handles them properly.
*/
NET_COALESCE_DOUBLE_SLASH_IS_ROOT = 1<<1
};
//----------------------------------------------------------------------------
// This module contains some private helper functions related to URL parsing.
//----------------------------------------------------------------------------
/* shutdown frees URL parser */
void net_ShutdownURLHelper();
#ifdef XP_MACOSX
void net_ShutdownURLHelperOSX();
#endif
/* access URL parsers */
nsIURLParser * net_GetAuthURLParser();
nsIURLParser * net_GetNoAuthURLParser();
nsIURLParser * net_GetStdURLParser();
/* convert between nsIFile and file:// URL spec
* net_GetURLSpecFromFile does an extra stat, so callers should
* avoid it if possible in favor of net_GetURLSpecFromActualFile
* and net_GetURLSpecFromDir */
nsresult net_GetURLSpecFromFile(nsIFile *, nsACString &);
nsresult net_GetURLSpecFromDir(nsIFile *, nsACString &);
nsresult net_GetURLSpecFromActualFile(nsIFile *, nsACString &);
nsresult net_GetFileFromURLSpec(const nsACString &, nsIFile **);
/* extract file path components from file:// URL */
nsresult net_ParseFileURL(const nsACString &inURL,
nsACString &outDirectory,
nsACString &outFileBaseName,
nsACString &outFileExtension);
/* handle .. in dirs while resolving URLs (path is UTF-8) */
void net_CoalesceDirs(netCoalesceFlags flags, char* path);
/**
* Resolves a relative path string containing "." and ".."
* with respect to a base path (assumed to already be resolved).
* For example, resolving "../../foo/./bar/../baz.html" w.r.t.
* "/a/b/c/d/e/" yields "/a/b/c/foo/baz.html". Attempting to
* ascend above the base results in the NS_ERROR_MALFORMED_URI
* exception. If basePath is null, it treats it as "/".
*
* @param relativePath a relative URI
* @param basePath a base URI
*
* @return a new string, representing canonical uri
*/
nsresult net_ResolveRelativePath(const nsACString &relativePath,
const nsACString &basePath,
nsACString &result);
/**
* Check if a URL is absolute
*
* @param inURL URL spec
* @return true if the given spec represents an absolute URL
*/
bool net_IsAbsoluteURL(const nsACString& inURL);
/**
* Extract URI-Scheme if possible
*
* @param inURI URI spec
* @param scheme scheme copied to this buffer on return (may be null)
*/
nsresult net_ExtractURLScheme(const nsACString &inURI,
nsACString &scheme);
/* check that the given scheme conforms to RFC 2396 */
bool net_IsValidScheme(const char *scheme, uint32_t schemeLen);
inline bool net_IsValidScheme(const nsAFlatCString &scheme)
{
return net_IsValidScheme(scheme.get(), scheme.Length());
}
/**
* This function strips out all C0 controls and space at the beginning and end
* of the URL and filters out \r, \n, \t from the middle of the URL. This makes
* it safe to call on things like javascript: urls or data: urls, where we may
* in fact run into whitespace that is not properly encoded.
*
* @param input the URL spec we want to filter
* @param result the out param to write to if filtering happens
*/
void net_FilterURIString(const nsACString& input, nsACString& result);
#if defined(XP_WIN)
/**
* On Win32 and OS/2 system's a back-slash in a file:// URL is equivalent to a
* forward-slash. This function maps any back-slashes to forward-slashes.
*
* @param aURL
* The URL string to normalize (UTF-8 encoded). This can be a
* relative URL segment.
* @param aResultBuf
* The resulting string is appended to this string. If the input URL
* is already normalized, then aResultBuf is unchanged.
*
* @returns false if aURL is already normalized. Otherwise, returns true.
*/
bool net_NormalizeFileURL(const nsACString &aURL,
nsCString &aResultBuf);
#endif
/*****************************************************************************
* generic string routines follow (XXX move to someplace more generic).
*/
/* convert to lower case */
void net_ToLowerCase(char* str, uint32_t length);
void net_ToLowerCase(char* str);
/**
* returns pointer to first character of |str| in the given set. if not found,
* then |end| is returned. stops prematurely if a null byte is encountered,
* and returns the address of the null byte.
*/
char * net_FindCharInSet(const char *str, const char *end, const char *set);
/**
* returns pointer to first character of |str| NOT in the given set. if all
* characters are in the given set, then |end| is returned. if '\0' is not
* included in |set|, then stops prematurely if a null byte is encountered,
* and returns the address of the null byte.
*/
char * net_FindCharNotInSet(const char *str, const char *end, const char *set);
/**
* returns pointer to last character of |str| NOT in the given set. if all
* characters are in the given set, then |str - 1| is returned.
*/
char * net_RFindCharNotInSet(const char *str, const char *end, const char *set);
/**
* Parses a content-type header and returns the content type and
* charset (if any). aCharset is not modified if no charset is
* specified in anywhere in aHeaderStr. In that case (no charset
* specified), aHadCharset is set to false. Otherwise, it's set to
* true. Note that aContentCharset can be empty even if aHadCharset
* is true.
*
* This parsing is suitable for HTTP request. Use net_ParseContentType
* for parsing this header in HTTP responses.
*/
void net_ParseRequestContentType(const nsACString &aHeaderStr,
nsACString &aContentType,
nsACString &aContentCharset,
bool* aHadCharset);
/**
* Parses a content-type header and returns the content type and
* charset (if any). aCharset is not modified if no charset is
* specified in anywhere in aHeaderStr. In that case (no charset
* specified), aHadCharset is set to false. Otherwise, it's set to
* true. Note that aContentCharset can be empty even if aHadCharset
* is true.
*/
void net_ParseContentType(const nsACString &aHeaderStr,
nsACString &aContentType,
nsACString &aContentCharset,
bool* aHadCharset);
/**
* As above, but also returns the start and end indexes for the charset
* parameter in aHeaderStr. These are indices for the entire parameter, NOT
* just the value. If there is "effectively" no charset parameter (e.g. if an
* earlier type with one is overridden by a later type without one),
* *aHadCharset will be true but *aCharsetStart will be set to -1. Note that
* it's possible to have aContentCharset empty and *aHadCharset true when
* *aCharsetStart is nonnegative; this corresponds to charset="".
*/
void net_ParseContentType(const nsACString &aHeaderStr,
nsACString &aContentType,
nsACString &aContentCharset,
bool *aHadCharset,
int32_t *aCharsetStart,
int32_t *aCharsetEnd);
/* inline versions */
/* remember the 64-bit platforms ;-) */
#define NET_MAX_ADDRESS (((char*)0)-1)
inline char *net_FindCharInSet(const char *str, const char *set)
{
return net_FindCharInSet(str, NET_MAX_ADDRESS, set);
}
inline char *net_FindCharNotInSet(const char *str, const char *set)
{
return net_FindCharNotInSet(str, NET_MAX_ADDRESS, set);
}
inline char *net_RFindCharNotInSet(const char *str, const char *set)
{
return net_RFindCharNotInSet(str, str + strlen(str), set);
}
/**
* This function returns true if the given hostname does not include any
* restricted characters. Otherwise, false is returned.
*/
bool net_IsValidHostName(const nsCSubstring &host);
/**
* Checks whether the IPv4 address is valid according to RFC 3986 section 3.2.2.
*/
bool net_IsValidIPv4Addr(const char *addr, int32_t addrLen);
/**
* Checks whether the IPv6 address is valid according to RFC 3986 section 3.2.2.
*/
bool net_IsValidIPv6Addr(const char *addr, int32_t addrLen);
/**
* Returns the max length of a URL. The default is 1048576 (1 MB).
* Can be changed by pref "network.standard-url.max-length"
*/
int32_t net_GetURLMaxLength();
#endif // !nsURLHelper_h__
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