gecko-dev/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 "nsICharsetConverterManager.h"
#include "nsIPlatformCharset.h"
#include "nsILocalFile.h"
#include "nsIURIFixup.h"
#include "nsDefaultURIFixup.h"
static NS_DEFINE_CID(kPlatformCharsetCID, NS_PLATFORMCHARSET_CID);
static NS_DEFINE_CID(kCharsetConverterManagerCID, NS_ICHARSETCONVERTERMANAGER_CID);
/* Implementation file */
NS_IMPL_ISUPPORTS1(nsDefaultURIFixup, nsIURIFixup)
nsDefaultURIFixup::nsDefaultURIFixup()
{
NS_INIT_ISUPPORTS();
/* member initializers and constructor code */
}
nsDefaultURIFixup::~nsDefaultURIFixup()
{
/* destructor code */
}
/* nsIURI createFixupURI (in wstring aURIText, in unsigned long aFixupFlags); */
NS_IMETHODIMP
nsDefaultURIFixup::CreateFixupURI(const PRUnichar *aStringURI, PRUint32 aFixupFlags, nsIURI **aURI)
{
NS_ENSURE_ARG_POINTER(aStringURI);
NS_ENSURE_ARG_POINTER(aURI);
*aURI = nsnull;
// Try and get the prefs service
if (!mPrefs)
{
mPrefs = do_GetService(NS_PREF_CONTRACTID);
}
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");
// 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;
nsAutoString tempString;
tempString = Substring(uriString, 12, uriString.Length() - 12);
nsresult rv = CreateFixupURI(tempString.get(),
newFixupFlags,
getter_AddRefs(uri));
if (NS_FAILED(rv) || !uri)
return NS_ERROR_FAILURE;
nsXPIDLCString spec;
uri->GetSpec(getter_Copies(spec));
uriString.Assign(NS_LITERAL_STRING("view-source:"));
uriString.Append(NS_ConvertASCIItoUCS2(spec));
}
else {
// Check for if it is a file URL
FileURIFixup(uriString.get(), aURI);
if(*aURI)
return NS_OK;
#ifdef XP_PC
// Not a file URL, so translate '\' to '/' for convenience in the common protocols
if (uriString.FindChar(':') == -1 ||
uriString.EqualsIgnoreCase("http:", 5) ||
uriString.EqualsIgnoreCase("https:", 6) ||
uriString.EqualsIgnoreCase("ftp:", 4))
{
uriString.ReplaceChar(PRUnichar('\\'), PRUnichar('/'));
}
#endif
}
// Just try to create an URL out of it
NS_NewURI(aURI, uriString, 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 (mPrefs)
{
NS_ENSURE_SUCCESS(mPrefs->GetBoolPref("keyword.enabled", &fixupKeywords), NS_ERROR_FAILURE);
}
if (fixupKeywords)
{
KeywordURIFixup(uriString.get(), aURI);
if(*aURI)
return NS_OK;
}
}
// See if a protocol needs to be added
PRInt32 checkprotocol = uriString.Find("://",0);
// if no scheme (protocol) is found, assume http or ftp.
if (checkprotocol == -1) {
// 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"))
uriString.Assign(NS_LITERAL_STRING("ftp://") + uriString);
else
uriString.Assign(NS_LITERAL_STRING("http://") + uriString);
} // end if checkprotocol
nsresult rv = NS_NewURI(aURI, uriString, 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)
{
// 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
nsXPIDLCString username;
nsXPIDLCString password;
aURI->GetUsername(getter_Copies(username));
aURI->GetPassword(getter_Copies(password));
if (username.Length() > 0 || password.Length() > 0)
{
return PR_FALSE;
}
nsXPIDLCString host;
aURI->GetHost(getter_Copies(host));
nsCAutoString oldHost(host);
nsCAutoString newHost;
// 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;
}
// TODO: Defaulting to www.foo.com is a bit nasty. It should be a pref
// somewhere for people who'd prefer it to default to www.foo.org,
// www.foo.co.uk or whatever.
const char *prefix = "www.";
const char *suffix = ".com";
// Hardcoded to .com for the time being
if (numDots == 0)
{
newHost.Assign(prefix);
newHost.Append(oldHost);
newHost.Append(suffix);
}
else if (numDots == 1)
{
if (oldHost.EqualsIgnoreCase(prefix, nsCRT::strlen(prefix))) {
newHost.Assign(oldHost);
newHost.Append(suffix);
}
else {
newHost.Assign(prefix);
newHost.Append(oldHost);
}
}
else
{
// Do nothing
return PR_FALSE;
}
if (newHost.IsEmpty()) {
return PR_FALSE;
}
// Assign the new host string over the old one
aURI->SetHost(newHost.get());
return PR_TRUE;
}
nsresult nsDefaultURIFixup::FileURIFixup(const PRUnichar* aStringURI,
nsIURI** aURI)
{
nsAutoString uriSpecIn(aStringURI);
nsCAutoString uriSpecOut;
nsresult rv = ConvertFileToStringURI(uriSpecIn, 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(nsString& 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 / or \ (UNIX)
const PRUnichar * up = aIn.get();
if((PRUnichar('/') == *up) || (PRUnichar('\\') == *up))
{
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;
nsCAutoString file;
// 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
file.AssignWithConversion(aIn);
}
else {
// converts from Unicode to FS Charset
ConvertStringURIToFileCharset(aIn, file);
}
nsresult rv = NS_NewLocalFile(file.get(), PR_FALSE, getter_AddRefs(filePath));
if (NS_SUCCEEDED(rv))
{
nsXPIDLCString fileurl;
NS_GetURLSpecFromFile(filePath, getter_Copies(fileurl));
aOut.Assign(fileurl);
return NS_OK;
}
}
return NS_ERROR_FAILURE;
}
PRBool nsDefaultURIFixup::PossiblyByteExpandedFileName(nsString& 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
const PRUnichar* uniChar = aIn.get();
for (PRUint32 i = 0; i < aIn.Length(); i++) {
if ((uniChar[i] >= 0x0080) && (uniChar[i] <= 0x00FF)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
nsresult nsDefaultURIFixup::ConvertStringURIToFileCharset(nsString& aIn,
nsCString& aOut)
{
aOut = "";
// for file url, we need to convert the nsString to the file system
// charset before we pass to NS_NewURI
static nsAutoString fsCharset;
// find out the file system charset first
if(0 == fsCharset.Length())
{
fsCharset.Assign(NS_LITERAL_STRING("ISO-8859-1")); // set the fallback first.
nsCOMPtr<nsIPlatformCharset> plat(do_GetService(kPlatformCharsetCID));
NS_ENSURE_TRUE(plat, NS_ERROR_FAILURE);
NS_ENSURE_SUCCESS(plat->GetCharset(kPlatformCharsetSel_FileName, fsCharset),
NS_ERROR_FAILURE);
}
// We probably should cache ccm here.
// get a charset converter from the manager
nsCOMPtr<nsICharsetConverterManager> ccm(do_GetService(kCharsetConverterManagerCID));
NS_ENSURE_TRUE(ccm, NS_ERROR_FAILURE);
nsCOMPtr<nsIUnicodeEncoder> fsEncoder;
NS_ENSURE_SUCCESS(ccm->GetUnicodeEncoder(&fsCharset,
getter_AddRefs(fsEncoder)), NS_ERROR_FAILURE);
PRInt32 bufLen = 0;
NS_ENSURE_SUCCESS(fsEncoder->GetMaxLength(aIn.get(), aIn.Length(),
&bufLen), NS_ERROR_FAILURE);
aOut.SetCapacity(bufLen+1);
PRInt32 srclen = aIn.Length();
NS_ENSURE_SUCCESS(fsEncoder->Convert(aIn.get(), &srclen,
(char*)aOut.get(), &bufLen), NS_ERROR_FAILURE);
((char*)aOut.get())[bufLen]='\0';
aOut.SetLength(bufLen);
return NS_OK;
}
nsresult nsDefaultURIFixup::KeywordURIFixup(const PRUnichar* aStringURI,
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"
nsAutoString uriString(aStringURI);
if(uriString.FindChar('.') == -1 && uriString.FindChar(':') == -1)
{
PRInt32 qMarkLoc = uriString.FindChar('?');
PRInt32 spaceLoc = uriString.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(uriString);
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);
}