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pjs/docshell/base/nsDefaultURIFixup.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Mozilla browser.
*
* The Initial Developer of the Original Code is Netscape
* Communications, Inc. Portions created by Netscape are
* Copyright (C) 1999, Mozilla. All Rights Reserved.
*
* Contributor(s):
* Adam Lock <adamlock@netscape.com>
*/
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsNetUtil.h"
#include "nsEscape.h"
#include "nsCRT.h"
#include "nsIPrefService.h"
#include "nsIPlatformCharset.h"
#include "nsILocalFile.h"
#include "nsIURIFixup.h"
#include "nsDefaultURIFixup.h"
/* Implementation file */
NS_IMPL_ISUPPORTS1(nsDefaultURIFixup, nsIURIFixup)
nsDefaultURIFixup::nsDefaultURIFixup()
{
/* member initializers and constructor code */
// Try and get the pref service
mPrefBranch = do_GetService(NS_PREFSERVICE_CONTRACTID);
}
nsDefaultURIFixup::~nsDefaultURIFixup()
{
/* destructor code */
}
/* nsIURI createExposableURI (in nsIRUI aURI); */
NS_IMETHODIMP
nsDefaultURIFixup::CreateExposableURI(nsIURI *aURI, nsIURI **aReturn)
{
NS_ENSURE_ARG_POINTER(aURI);
NS_ENSURE_ARG_POINTER(aReturn);
PRBool isWyciwyg = PR_FALSE;
aURI->SchemeIs("wyciwyg", &isWyciwyg);
if (!isWyciwyg)
{
*aReturn = aURI;
NS_ADDREF(*aReturn);
return NS_OK;
}
nsCAutoString path;
nsresult rv = aURI->GetPath(path);
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 pathLength = path.Length();
if (pathLength <= 2)
{
return NS_ERROR_FAILURE;
}
// Path is of the form "//123/http://foo/bar", with a variable number of digits.
// To figure out where the "real" URL starts, search path for a '/', starting at
// the third character.
PRInt32 slashIndex = path.FindChar('/', 2);
if (slashIndex == kNotFound)
{
return NS_ERROR_FAILURE;
}
// Get the charset of the original URI so we can pass it to our fixed up URI.
nsCAutoString charset;
aURI->GetOriginCharset(charset);
rv = NS_NewURI(aReturn,
Substring(path, slashIndex + 1, pathLength - slashIndex - 1),
charset.get());
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
/* nsIURI createFixupURI (in wstring aURIText, in unsigned long aFixupFlags); */
NS_IMETHODIMP
nsDefaultURIFixup::CreateFixupURI(const nsAString& aStringURI, PRUint32 aFixupFlags, nsIURI **aURI)
{
NS_ENSURE_ARG(!aStringURI.IsEmpty());
NS_ENSURE_ARG_POINTER(aURI);
nsresult rv;
*aURI = nsnull;
nsAutoString uriString(aStringURI);
uriString.Trim(" "); // Cleanup the empty spaces that might be on each end.
// Eliminate embedded newlines, which single-line text fields now allow:
uriString.StripChars("\r\n");
NS_ENSURE_TRUE(!uriString.IsEmpty(), NS_ERROR_FAILURE);
// View-source is a pseudo scheme. We're interested in fixing up the stuff
// after it. The easiest way to do that is to call this method again with the
// "view-source:" lopped off and then prepend it again afterwards.
if (uriString.EqualsIgnoreCase("view-source:", 12))
{
nsCOMPtr<nsIURI> uri;
PRUint32 newFixupFlags = aFixupFlags & ~FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP;
rv = CreateFixupURI(Substring(uriString, 12, uriString.Length() - 12),
newFixupFlags, getter_AddRefs(uri));
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
nsCAutoString spec;
uri->GetSpec(spec);
uriString.Assign(NS_LITERAL_STRING("view-source:") + NS_ConvertUTF8toUCS2(spec));
}
else {
// Check for if it is a file URL
FileURIFixup(uriString, aURI);
if(*aURI)
return NS_OK;
#ifdef XP_PC
// Not a file URL, so translate '\' to '/' for convenience in the common protocols
// e.g. catch
//
// http:\\broken.com\address
// http:\\broken.com/blah
// broken.com\blah
//
// Code will also do partial fix up the following urls
//
// http:\\broken.com\address/somewhere\image.jpg (stops at first forward slash)
// http:\\broken.com\blah?arg=somearg\foo.jpg (stops at question mark)
// http:\\broken.com#odd\ref (stops at hash)
//
if (uriString.FindChar(':') == -1 ||
uriString.EqualsIgnoreCase("http:", 5) ||
uriString.EqualsIgnoreCase("https:", 6) ||
uriString.EqualsIgnoreCase("ftp:", 4))
{
// Walk the string replacing backslashes with forward slashes until
// the end is reached, or a question mark, or a hash, or a forward
// slash. The forward slash test is to stop before trampling over
// URIs which legitimately contain a mix of both forward and
// backward slashes.
nsAFlatString::iterator start;
nsAFlatString::iterator end;
uriString.BeginWriting(start);
uriString.EndWriting(end);
while (start != end) {
if (*start == '?' || *start == '#' || *start == '/')
break;
if (*start == '\\')
*start = '/';
++start;
}
}
#endif
}
// For these protocols, use system charset instead of the default UTF-8,
// if the URI is non ASCII.
PRBool bAsciiURI = IsASCII(uriString);
PRBool bUseNonDefaultCharsetForURI =
!bAsciiURI &&
(uriString.FindChar(':') == kNotFound ||
uriString.EqualsIgnoreCase("http:", 5) ||
uriString.EqualsIgnoreCase("https:", 6) ||
uriString.EqualsIgnoreCase("ftp:", 4) ||
uriString.EqualsIgnoreCase("file:", 5));
// Check the scheme...
NS_LossyConvertUCS2toASCII asciiURI(uriString);
nsCOMPtr<nsIIOService> ioService = do_GetService(NS_IOSERVICE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCAutoString scheme;
ioService->ExtractScheme(asciiURI, scheme);
nsCOMPtr<nsIProtocolHandler> ourHandler, extHandler;
ioService->GetProtocolHandler(scheme.get(), getter_AddRefs(ourHandler));
extHandler = do_GetService(NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX"default");
if (ourHandler != extHandler || !PossiblyHostPortUrl(uriString)) {
// Just try to create an URL out of it
rv = NS_NewURI(aURI, uriString,
bUseNonDefaultCharsetForURI ? GetCharsetForUrlBar() : nsnull);
}
if (*aURI) {
if (aFixupFlags & FIXUP_FLAGS_MAKE_ALTERNATE_URI)
MakeAlternateURI(*aURI);
return NS_OK;
}
// See if it is a keyword
// Test whether keywords need to be fixed up
if (aFixupFlags & FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP) {
PRBool fixupKeywords = PR_FALSE;
if (mPrefBranch)
{
NS_ENSURE_SUCCESS(mPrefBranch->GetBoolPref("keyword.enabled", &fixupKeywords), NS_ERROR_FAILURE);
}
if (fixupKeywords)
{
KeywordURIFixup(uriString, aURI);
if(*aURI)
return NS_OK;
}
}
// Prune duff protocol schemes
//
// ://totallybroken.url.com
// //shorthand.url.com
//
if (uriString.EqualsIgnoreCase("://", 3))
{
nsAutoString newUriString;
uriString.Mid(newUriString, 3, uriString.Length() - 3);
uriString = newUriString;
}
else if (uriString.EqualsIgnoreCase("//", 2))
{
nsAutoString newUriString;
uriString.Mid(newUriString, 2, uriString.Length() - 2);
uriString = newUriString;
}
// Add ftp:// or http:// to front of url if it has no spec
//
// Should fix:
//
// no-scheme.com
// ftp.no-scheme.com
// ftp4.no-scheme,com
// no-scheme.com/query?foo=http://www.foo.com
//
PRInt32 schemeDelim = uriString.Find("://",0);
PRInt32 firstDelim = uriString.FindCharInSet("/:");
if (schemeDelim <= 0 ||
(firstDelim != -1 && schemeDelim > firstDelim)) {
// find host name
PRInt32 hostPos = uriString.FindCharInSet("/:?#");
if (hostPos == -1)
hostPos = uriString.Length();
// extract host name
nsAutoString hostSpec;
uriString.Left(hostSpec, hostPos);
// insert url spec corresponding to host name
if (hostSpec.EqualsIgnoreCase("ftp", 3))
uriString.Assign(NS_LITERAL_STRING("ftp://") + uriString);
else
uriString.Assign(NS_LITERAL_STRING("http://") + uriString);
// For ftp & http, we want to use system charset.
if (!bAsciiURI)
bUseNonDefaultCharsetForURI = PR_TRUE;
} // end if checkprotocol
rv = NS_NewURI(aURI, uriString, bUseNonDefaultCharsetForURI ? GetCharsetForUrlBar() : nsnull);
// Did the caller want us to try an alternative URI?
// If so, attempt to fixup http://foo into http://www.foo.com
if (*aURI && aFixupFlags & FIXUP_FLAGS_MAKE_ALTERNATE_URI) {
MakeAlternateURI(*aURI);
}
return rv;
}
PRBool nsDefaultURIFixup::MakeAlternateURI(nsIURI *aURI)
{
if (!mPrefBranch)
{
return PR_FALSE;
}
PRBool makeAlternate = PR_TRUE;
mPrefBranch->GetBoolPref("browser.fixup.alternate.enabled", &makeAlternate);
if (!makeAlternate)
{
return PR_FALSE;
}
// Code only works for http. Not for any other protocol including https!
PRBool isHttp = PR_FALSE;
aURI->SchemeIs("http", &isHttp);
if (!isHttp) {
return PR_FALSE;
}
// Security - URLs with user / password info should NOT be fixed up
nsCAutoString userpass;
aURI->GetUserPass(userpass);
if (userpass.Length() > 0) {
return PR_FALSE;
}
nsCAutoString oldHost;
nsCAutoString newHost;
aURI->GetHost(oldHost);
// Count the dots
PRInt32 numDots = 0;
nsReadingIterator<char> iter;
nsReadingIterator<char> iterEnd;
oldHost.BeginReading(iter);
oldHost.EndReading(iterEnd);
while (iter != iterEnd) {
if (*iter == '.')
numDots++;
++iter;
}
nsresult rv;
// Get the prefix and suffix to stick onto the new hostname. By default these
// are www. & .com but they could be any other value, e.g. www. & .org
nsCAutoString prefix("www.");
nsXPIDLCString prefPrefix;
rv = mPrefBranch->GetCharPref("browser.fixup.alternate.prefix", getter_Copies(prefPrefix));
if (NS_SUCCEEDED(rv))
{
prefix.Assign(prefPrefix);
}
nsCAutoString suffix(".com");
nsXPIDLCString prefSuffix;
rv = mPrefBranch->GetCharPref("browser.fixup.alternate.suffix", getter_Copies(prefSuffix));
if (NS_SUCCEEDED(rv))
{
suffix.Assign(prefSuffix);
}
if (numDots == 0)
{
newHost.Assign(prefix);
newHost.Append(oldHost);
newHost.Append(suffix);
}
else if (numDots == 1)
{
if (prefix.Length() > 0 &&
oldHost.EqualsIgnoreCase(prefix.get(), prefix.Length())) {
newHost.Assign(oldHost);
newHost.Append(suffix);
}
else if (suffix.Length() > 0) {
newHost.Assign(prefix);
newHost.Append(oldHost);
}
else
{
// Do nothing
return PR_FALSE;
}
}
else
{
// Do nothing
return PR_FALSE;
}
if (newHost.IsEmpty()) {
return PR_FALSE;
}
// Assign the new host string over the old one
aURI->SetHost(newHost);
return PR_TRUE;
}
nsresult nsDefaultURIFixup::FileURIFixup(const nsAString& aStringURI,
nsIURI** aURI)
{
nsCAutoString uriSpecOut;
nsresult rv = ConvertFileToStringURI(aStringURI, uriSpecOut);
if (NS_SUCCEEDED(rv))
{
// if this is file url, uriSpecOut is already in FS charset
if(NS_SUCCEEDED(NS_NewURI(aURI, uriSpecOut.get(), nsnull)))
return NS_OK;
}
return NS_ERROR_FAILURE;
}
nsresult nsDefaultURIFixup::ConvertFileToStringURI(const nsAString& aIn,
nsCString& aOut)
{
PRBool attemptFixup = PR_FALSE;
#ifdef XP_PC
// Check for \ in the url-string or just a drive (PC)
if(kNotFound != aIn.FindChar(PRUnichar('\\')) || ((aIn.Length() == 2 ) && (aIn.Last() == PRUnichar(':') || aIn.Last() == PRUnichar('|'))))
{
attemptFixup = PR_TRUE;
}
#elif XP_UNIX
// Check if it starts with / (UNIX)
if(aIn.First() == PRUnichar('/'))
{
attemptFixup = PR_TRUE;
}
#else
// Do nothing (All others for now)
#endif
if (attemptFixup)
{
// Test if this is a valid path by trying to create a local file
// object. The URL of that is returned if successful.
// NOTE: Please be sure to check that the call to NS_NewLocalFile
// rejects bad file paths when using this code on a new
// platform.
nsCOMPtr<nsILocalFile> filePath;
nsresult rv;
// this is not the real fix but a temporary fix
// in order to really fix the problem, we need to change the
// nsICmdLineService interface to use wstring to pass paramenters
// instead of string since path name and other argument could be
// in non ascii.(see bug 87127) Since it is too risky to make interface change right
// now, we decide not to do so now.
// Therefore, the aIn we receive here maybe already in damage form
// (e.g. treat every bytes as ISO-8859-1 and cast up to PRUnichar
// while the real data could be in file system charset )
// we choice the following logic which will work for most of the case.
// Case will still failed only if it meet ALL the following condiction:
// 1. running on CJK, Russian, or Greek system, and
// 2. user type it from URL bar
// 3. the file name contains character in the range of
// U+00A1-U+00FF but encode as different code point in file
// system charset (e.g. ACP on window)- this is very rare case
// We should remove this logic and convert to File system charset here
// once we change nsICmdLineService to use wstring and ensure
// all the Unicode data come in is correctly converted.
if (PossiblyByteExpandedFileName(aIn)) {
// removes high byte
rv = NS_NewNativeLocalFile(NS_LossyConvertUCS2toASCII(aIn), PR_FALSE, getter_AddRefs(filePath));
}
else {
// input is unicode
rv = NS_NewLocalFile(aIn, PR_FALSE, getter_AddRefs(filePath));
}
if (NS_SUCCEEDED(rv))
{
NS_GetURLSpecFromFile(filePath, aOut);
return NS_OK;
}
}
return NS_ERROR_FAILURE;
}
PRBool nsDefaultURIFixup::PossiblyHostPortUrl(const nsAString &aUrl)
{
// Oh dear, the protocol is invalid. Test if the protocol might
// actually be a url without a protocol:
//
// http://www.faqs.org/rfcs/rfc1738.html
// http://www.faqs.org/rfcs/rfc2396.html
//
// e.g. Anything of the form:
//
// <hostname>:<port> or
// <hostname>:<port>/
//
// Where <hostname> is a string of alphanumeric characters and dashes
// seperated by dots.
// and <port> is a 5 or less digits. This actually breaks the rfc2396
// definition of a scheme which allows dots in schemes.
//
// Note:
// People expecting this to work with
// <user>:<password>@<host>:<port>/<url-path> will be disappointed!
//
// Note: Parser could be a lot tighter, tossing out silly hostnames
// such as those containing consecutive dots and so on.
// Read the hostname which should of the form
// [a-zA-Z0-9\-]+(\.[a-zA-Z0-9\-]+)*:
nsReadingIterator<PRUnichar> iterBegin;
nsReadingIterator<PRUnichar> iterEnd;
aUrl.BeginReading(iterBegin);
aUrl.EndReading(iterEnd);
nsReadingIterator<PRUnichar> iter = iterBegin;
while (iter != iterEnd)
{
PRUint32 chunkSize = 0;
// Parse a chunk of the address
while (iter != iterEnd &&
(*iter == PRUnichar('-') ||
nsCRT::IsAsciiAlpha(*iter) ||
nsCRT::IsAsciiDigit(*iter)))
{
++chunkSize;
++iter;
}
if (chunkSize == 0 || iter == iterEnd)
{
return PR_FALSE;
}
if (*iter == PRUnichar(':'))
{
// Go onto checking the for the digits
break;
}
if (*iter != PRUnichar('.'))
{
// Whatever it is, it ain't a hostname!
return PR_FALSE;
}
++iter;
}
if (iter == iterEnd)
{
// No point continuing since there is no colon
return PR_FALSE;
}
++iter;
// Count the number of digits after the colon and before the
// next forward slash (or end of string)
PRUint32 digitCount = 0;
while (iter != iterEnd && digitCount <= 5)
{
if (nsCRT::IsAsciiDigit(*iter))
{
digitCount++;
}
else if (*iter == PRUnichar('/'))
{
break;
}
else
{
// Whatever it is, it ain't a port!
return PR_FALSE;
}
++iter;
}
if (digitCount == 0 || digitCount > 5)
{
// No digits or more digits than a port would have.
return PR_FALSE;
}
// Yes, it's possibly a host:port url
return PR_TRUE;
}
PRBool nsDefaultURIFixup::PossiblyByteExpandedFileName(const nsAString& aIn)
{
// XXXXX HACK XXXXX : please don't copy this code.
// There are cases where aIn contains the locale byte chars padded to short
// (thus the name "ByteExpanded"); whereas other cases
// have proper Unicode code points.
// This is a temporary fix. Please refer to 58866, 86948
nsReadingIterator<PRUnichar> iter;
nsReadingIterator<PRUnichar> iterEnd;
aIn.BeginReading(iter);
aIn.EndReading(iterEnd);
while (iter != iterEnd)
{
if (*iter >= 0x0080 && *iter <= 0x00FF)
return PR_TRUE;
++iter;
}
return PR_FALSE;
}
const char * nsDefaultURIFixup::GetFileSystemCharset()
{
if (mFsCharset.IsEmpty())
{
nsresult rv;
nsAutoString charset;
nsCOMPtr<nsIPlatformCharset> plat(do_GetService(NS_PLATFORMCHARSET_CONTRACTID, &rv));
if (NS_SUCCEEDED(rv))
rv = plat->GetCharset(kPlatformCharsetSel_FileName, charset);
if (charset.IsEmpty())
mFsCharset.Assign(NS_LITERAL_CSTRING("ISO-8859-1"));
else
mFsCharset.Assign(NS_LossyConvertUCS2toASCII(charset));
}
return mFsCharset.get();
}
const char * nsDefaultURIFixup::GetCharsetForUrlBar()
{
const char *charset = GetFileSystemCharset();
#ifdef XP_MAC
// check for "x-mac-" prefix
if ((strlen(charset) >= 6) && charset[0] == 'x' && charset[2] == 'm')
{
if (!strcmp("x-mac-roman", charset))
return "ISO-8859-1";
// we can do more x-mac-xxxx mapping here
// or somewhere in intl code like nsIPlatformCharset.
}
#endif
return charset;
}
nsresult nsDefaultURIFixup::KeywordURIFixup(const nsAString & aURIString,
nsIURI** aURI)
{
// These are keyword formatted strings
// "what is mozilla"
// "what is mozilla?"
// "?mozilla"
// "?What is mozilla"
// These are not keyword formatted strings
// "www.blah.com" - anything with a dot in it
// "nonQualifiedHost:80" - anything with a colon in it
// "nonQualifiedHost?"
// "nonQualifiedHost?args"
// "nonQualifiedHost?some args"
if(aURIString.FindChar('.') == -1 && aURIString.FindChar(':') == -1)
{
PRInt32 qMarkLoc = aURIString.FindChar('?');
PRInt32 spaceLoc = aURIString.FindChar(' ');
PRBool keyword = PR_FALSE;
if(qMarkLoc == 0)
keyword = PR_TRUE;
else if((spaceLoc > 0) && ((qMarkLoc == -1) || (spaceLoc < qMarkLoc)))
keyword = PR_TRUE;
if(keyword)
{
nsCAutoString keywordSpec("keyword:");
char *utf8Spec = ToNewUTF8String(aURIString);
if(utf8Spec)
{
char* escapedUTF8Spec = nsEscape(utf8Spec, url_Path);
if(escapedUTF8Spec)
{
keywordSpec.Append(escapedUTF8Spec);
NS_NewURI(aURI, keywordSpec.get(), nsnull);
nsMemory::Free(escapedUTF8Spec);
} // escapedUTF8Spec
nsMemory::Free(utf8Spec);
} // utf8Spec
} // keyword
} // FindChar
if(*aURI)
return NS_OK;
return NS_ERROR_FAILURE;
}
nsresult NS_NewURIFixup(nsIURIFixup **aURIFixup)
{
nsDefaultURIFixup *fixup = new nsDefaultURIFixup;
if (fixup == nsnull)
{
return NS_ERROR_OUT_OF_MEMORY;
}
return fixup->QueryInterface(NS_GET_IID(nsIURIFixup), (void **) aURIFixup);
}
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