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gecko-dev/docshell/base/nsDefaultURIFixup.cpp
Gijs Kruitbosch faf81a4714 Bug 1087380 - avoid alternate (www....com) URI fixup for localhost and items with ports, r=bz 
MozReview-Commit-ID: HB9SxRSWnz

--HG--
extra : rebase_source : 99a9708588b277e31c8082b9579371609fc658d1
2017-05-06 19:59:24 +01:00

1101 lines
34 KiB
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsIProtocolHandler.h"
#include "nsCRT.h"
#include "nsIFile.h"
#include <algorithm>
#ifdef MOZ_TOOLKIT_SEARCH
#include "nsIBrowserSearchService.h"
#endif
#include "nsIURIFixup.h"
#include "nsDefaultURIFixup.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/ipc/IPCStreamUtils.h"
#include "mozilla/ipc/URIUtils.h"
#include "mozilla/Tokenizer.h"
#include "nsIObserverService.h"
#include "nsXULAppAPI.h"
// Used to check if external protocol schemes are usable
#include "nsCExternalHandlerService.h"
#include "nsIExternalProtocolService.h"
using namespace mozilla;
/* Implementation file */
NS_IMPL_ISUPPORTS(nsDefaultURIFixup, nsIURIFixup)
static bool sInitializedPrefCaches = false;
static bool sFixTypos = true;
static bool sDNSFirstForSingleWords = false;
static bool sFixupKeywords = true;
nsDefaultURIFixup::nsDefaultURIFixup()
{
}
nsDefaultURIFixup::~nsDefaultURIFixup()
{
}
NS_IMETHODIMP
nsDefaultURIFixup::CreateExposableURI(nsIURI* aURI, nsIURI** aReturn)
{
NS_ENSURE_ARG_POINTER(aURI);
NS_ENSURE_ARG_POINTER(aReturn);
bool isWyciwyg = false;
aURI->SchemeIs("wyciwyg", &isWyciwyg);
nsAutoCString userPass;
aURI->GetUserPass(userPass);
// most of the time we can just AddRef and return
if (!isWyciwyg && userPass.IsEmpty()) {
*aReturn = aURI;
NS_ADDREF(*aReturn);
return NS_OK;
}
// Rats, we have to massage the URI
nsCOMPtr<nsIURI> uri;
if (isWyciwyg) {
nsAutoCString path;
nsresult rv = aURI->GetPath(path);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t 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.
int32_t 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.
nsAutoCString charset;
aURI->GetOriginCharset(charset);
rv = NS_NewURI(getter_AddRefs(uri),
Substring(path, slashIndex + 1, pathLength - slashIndex - 1),
charset.get());
NS_ENSURE_SUCCESS(rv, rv);
} else {
// clone the URI so zapping user:pass doesn't change the original
nsresult rv = aURI->Clone(getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
}
// hide user:pass unless overridden by pref
if (Preferences::GetBool("browser.fixup.hide_user_pass", true)) {
uri->SetUserPass(EmptyCString());
}
uri.forget(aReturn);
return NS_OK;
}
NS_IMETHODIMP
nsDefaultURIFixup::CreateFixupURI(const nsACString& aStringURI,
uint32_t aFixupFlags,
nsIInputStream** aPostData, nsIURI** aURI)
{
nsCOMPtr<nsIURIFixupInfo> fixupInfo;
nsresult rv = GetFixupURIInfo(aStringURI, aFixupFlags, aPostData,
getter_AddRefs(fixupInfo));
NS_ENSURE_SUCCESS(rv, rv);
fixupInfo->GetPreferredURI(aURI);
return rv;
}
// Returns true if the URL contains a user:password@ or user@
static bool
HasUserPassword(const nsACString& aStringURI)
{
mozilla::Tokenizer parser(aStringURI);
mozilla::Tokenizer::Token token;
// May start with any of "protocol:", "protocol://", "//", "://"
if (parser.Check(Tokenizer::TOKEN_WORD, token)) { // Skip protocol if any
}
if (parser.CheckChar(':')) { // Skip colon if found
}
while (parser.CheckChar('/')) { // Skip all of the following slashes
}
while (parser.Next(token)) {
if (token.Type() == Tokenizer::TOKEN_CHAR) {
if (token.AsChar() == '/') {
return false;
}
if (token.AsChar() == '@') {
return true;
}
}
}
return false;
}
NS_IMETHODIMP
nsDefaultURIFixup::GetFixupURIInfo(const nsACString& aStringURI,
uint32_t aFixupFlags,
nsIInputStream** aPostData,
nsIURIFixupInfo** aInfo)
{
NS_ENSURE_ARG(!aStringURI.IsEmpty());
nsresult rv;
nsAutoCString uriString(aStringURI);
// Eliminate embedded newlines, which single-line text fields now allow:
uriString.StripCRLF();
// Cleanup the empty spaces that might be on each end:
uriString.Trim(" ");
NS_ENSURE_TRUE(!uriString.IsEmpty(), NS_ERROR_FAILURE);
RefPtr<nsDefaultURIFixupInfo> info = new nsDefaultURIFixupInfo(uriString);
NS_ADDREF(*aInfo = info);
nsCOMPtr<nsIIOService> ioService =
do_GetService(NS_IOSERVICE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString scheme;
ioService->ExtractScheme(aStringURI, scheme);
// 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 (scheme.LowerCaseEqualsLiteral("view-source")) {
nsCOMPtr<nsIURIFixupInfo> uriInfo;
// We disable keyword lookup and alternate URIs so that small typos don't
// cause us to look at very different domains
uint32_t newFixupFlags = aFixupFlags & ~FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP
& ~FIXUP_FLAGS_MAKE_ALTERNATE_URI;
const uint32_t viewSourceLen = sizeof("view-source:") - 1;
nsAutoCString innerURIString(Substring(uriString, viewSourceLen,
uriString.Length() -
viewSourceLen));
// Prevent recursion:
innerURIString.Trim(" ");
nsAutoCString innerScheme;
ioService->ExtractScheme(innerURIString, innerScheme);
if (innerScheme.LowerCaseEqualsLiteral("view-source")) {
return NS_ERROR_FAILURE;
}
rv = GetFixupURIInfo(innerURIString, newFixupFlags, aPostData,
getter_AddRefs(uriInfo));
if (NS_FAILED(rv)) {
return NS_ERROR_FAILURE;
}
nsAutoCString spec;
nsCOMPtr<nsIURI> uri;
uriInfo->GetPreferredURI(getter_AddRefs(uri));
if (!uri) {
return NS_ERROR_FAILURE;
}
uri->GetSpec(spec);
uriString.AssignLiteral("view-source:");
uriString.Append(spec);
} else {
// Check for if it is a file URL
nsCOMPtr<nsIURI> uri;
FileURIFixup(uriString, getter_AddRefs(uri));
// NB: FileURIFixup only returns a URI if it had to fix the protocol to
// do so, so passing in file:///foo/bar will not hit this path:
if (uri) {
uri.swap(info->mFixedURI);
info->mPreferredURI = info->mFixedURI;
info->mFixupChangedProtocol = true;
return NS_OK;
}
}
if (!sInitializedPrefCaches) {
// Check if we want to fix up common scheme typos.
rv = Preferences::AddBoolVarCache(&sFixTypos,
"browser.fixup.typo.scheme",
sFixTypos);
MOZ_ASSERT(NS_SUCCEEDED(rv),
"Failed to observe \"browser.fixup.typo.scheme\"");
rv = Preferences::AddBoolVarCache(&sDNSFirstForSingleWords,
"browser.fixup.dns_first_for_single_words",
sDNSFirstForSingleWords);
MOZ_ASSERT(NS_SUCCEEDED(rv),
"Failed to observe \"browser.fixup.dns_first_for_single_words\"");
rv = Preferences::AddBoolVarCache(&sFixupKeywords, "keyword.enabled",
sFixupKeywords);
MOZ_ASSERT(NS_SUCCEEDED(rv), "Failed to observe \"keyword.enabled\"");
sInitializedPrefCaches = true;
}
// Fix up common scheme typos.
if (sFixTypos && (aFixupFlags & FIXUP_FLAG_FIX_SCHEME_TYPOS)) {
// Fast-path for common cases.
if (scheme.IsEmpty() ||
scheme.LowerCaseEqualsLiteral("http") ||
scheme.LowerCaseEqualsLiteral("https") ||
scheme.LowerCaseEqualsLiteral("ftp") ||
scheme.LowerCaseEqualsLiteral("file")) {
// Do nothing.
} else if (scheme.LowerCaseEqualsLiteral("ttp")) {
// ttp -> http.
uriString.Replace(0, 3, "http");
scheme.AssignLiteral("http");
info->mFixupChangedProtocol = true;
} else if (scheme.LowerCaseEqualsLiteral("ttps")) {
// ttps -> https.
uriString.Replace(0, 4, "https");
scheme.AssignLiteral("https");
info->mFixupChangedProtocol = true;
} else if (scheme.LowerCaseEqualsLiteral("tps")) {
// tps -> https.
uriString.Replace(0, 3, "https");
scheme.AssignLiteral("https");
info->mFixupChangedProtocol = true;
} else if (scheme.LowerCaseEqualsLiteral("ps")) {
// ps -> https.
uriString.Replace(0, 2, "https");
scheme.AssignLiteral("https");
info->mFixupChangedProtocol = true;
} else if (scheme.LowerCaseEqualsLiteral("ile")) {
// ile -> file.
uriString.Replace(0, 3, "file");
scheme.AssignLiteral("file");
info->mFixupChangedProtocol = true;
} else if (scheme.LowerCaseEqualsLiteral("le")) {
// le -> file.
uriString.Replace(0, 2, "file");
scheme.AssignLiteral("file");
info->mFixupChangedProtocol = true;
}
}
// Now we need to check whether "scheme" is something we don't
// really know about.
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(getter_AddRefs(info->mFixedURI), uriString, nullptr);
if (!info->mFixedURI && rv != NS_ERROR_MALFORMED_URI) {
return rv;
}
}
if (info->mFixedURI && ourHandler == extHandler && sFixupKeywords &&
(aFixupFlags & FIXUP_FLAG_FIX_SCHEME_TYPOS)) {
nsCOMPtr<nsIExternalProtocolService> extProtService =
do_GetService(NS_EXTERNALPROTOCOLSERVICE_CONTRACTID);
if (extProtService) {
bool handlerExists = false;
rv = extProtService->ExternalProtocolHandlerExists(scheme.get(),
&handlerExists);
if (NS_FAILED(rv)) {
return rv;
}
// This basically means we're dealing with a theoretically valid
// URI... but we have no idea how to load it. (e.g. "christmas:humbug")
// It's more likely the user wants to search, and so we
// chuck this over to their preferred search provider instead:
if (!handlerExists) {
bool hasUserPassword = HasUserPassword(uriString);
if (!hasUserPassword) {
TryKeywordFixupForURIInfo(uriString, info, aPostData);
} else {
// If the given URL has a user:password we can't just pass it to the
// external protocol handler; we'll try using it with http instead later
info->mFixedURI = nullptr;
}
}
}
}
if (info->mFixedURI) {
if (!info->mPreferredURI) {
if (aFixupFlags & FIXUP_FLAGS_MAKE_ALTERNATE_URI) {
info->mFixupCreatedAlternateURI = MakeAlternateURI(info->mFixedURI);
}
info->mPreferredURI = info->mFixedURI;
}
return NS_OK;
}
// Fix up protocol string before calling KeywordURIFixup, because
// it cares about the hostname of such URIs:
nsCOMPtr<nsIURI> uriWithProtocol;
bool inputHadDuffProtocol = false;
// Prune duff protocol schemes
//
// ://totallybroken.url.com
// //shorthand.url.com
//
if (StringBeginsWith(uriString, NS_LITERAL_CSTRING("://"))) {
uriString = StringTail(uriString, uriString.Length() - 3);
inputHadDuffProtocol = true;
} else if (StringBeginsWith(uriString, NS_LITERAL_CSTRING("//"))) {
uriString = StringTail(uriString, uriString.Length() - 2);
inputHadDuffProtocol = true;
}
// NB: this rv gets returned at the end of this method if we never
// do a keyword fixup after this (because the pref or the flags passed
// might not let us).
rv = FixupURIProtocol(uriString, info, getter_AddRefs(uriWithProtocol));
if (uriWithProtocol) {
info->mFixedURI = uriWithProtocol;
}
// See if it is a keyword
// Test whether keywords need to be fixed up
if (sFixupKeywords && (aFixupFlags & FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP) &&
!inputHadDuffProtocol) {
if (NS_SUCCEEDED(KeywordURIFixup(uriString, info, aPostData)) &&
info->mPreferredURI) {
return NS_OK;
}
}
// Did the caller want us to try an alternative URI?
// If so, attempt to fixup http://foo into http://www.foo.com
if (info->mFixedURI && aFixupFlags & FIXUP_FLAGS_MAKE_ALTERNATE_URI) {
info->mFixupCreatedAlternateURI = MakeAlternateURI(info->mFixedURI);
}
if (info->mFixedURI) {
info->mPreferredURI = info->mFixedURI;
return NS_OK;
}
// If we still haven't been able to construct a valid URI, try to force a
// keyword match. This catches search strings with '.' or ':' in them.
if (sFixupKeywords && (aFixupFlags & FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP)) {
rv = TryKeywordFixupForURIInfo(aStringURI, info, aPostData);
}
return rv;
}
NS_IMETHODIMP
nsDefaultURIFixup::KeywordToURI(const nsACString& aKeyword,
nsIInputStream** aPostData,
nsIURIFixupInfo** aInfo)
{
RefPtr<nsDefaultURIFixupInfo> info = new nsDefaultURIFixupInfo(aKeyword);
NS_ADDREF(*aInfo = info);
if (aPostData) {
*aPostData = nullptr;
}
NS_ENSURE_STATE(Preferences::GetRootBranch());
// Strip leading "?" and leading/trailing spaces from aKeyword
nsAutoCString keyword(aKeyword);
if (StringBeginsWith(keyword, NS_LITERAL_CSTRING("?"))) {
keyword.Cut(0, 1);
}
keyword.Trim(" ");
if (XRE_IsContentProcess()) {
dom::ContentChild* contentChild = dom::ContentChild::GetSingleton();
if (!contentChild) {
return NS_ERROR_NOT_AVAILABLE;
}
ipc::OptionalIPCStream postData;
ipc::OptionalURIParams uri;
nsAutoString providerName;
if (!contentChild->SendKeywordToURI(keyword, &providerName, &postData,
&uri)) {
return NS_ERROR_FAILURE;
}
CopyUTF8toUTF16(keyword, info->mKeywordAsSent);
info->mKeywordProviderName = providerName;
if (aPostData) {
nsCOMPtr<nsIInputStream> temp = ipc::DeserializeIPCStream(postData);
temp.forget(aPostData);
}
nsCOMPtr<nsIURI> temp = DeserializeURI(uri);
info->mPreferredURI = temp.forget();
return NS_OK;
}
#ifdef MOZ_TOOLKIT_SEARCH
// Try falling back to the search service's default search engine
nsCOMPtr<nsIBrowserSearchService> searchSvc =
do_GetService("@mozilla.org/browser/search-service;1");
if (searchSvc) {
nsCOMPtr<nsISearchEngine> defaultEngine;
searchSvc->GetDefaultEngine(getter_AddRefs(defaultEngine));
if (defaultEngine) {
nsCOMPtr<nsISearchSubmission> submission;
nsAutoString responseType;
// We allow default search plugins to specify alternate
// parameters that are specific to keyword searches.
NS_NAMED_LITERAL_STRING(mozKeywordSearch,
"application/x-moz-keywordsearch");
bool supportsResponseType = false;
defaultEngine->SupportsResponseType(mozKeywordSearch,
&supportsResponseType);
if (supportsResponseType) {
responseType.Assign(mozKeywordSearch);
}
NS_ConvertUTF8toUTF16 keywordW(keyword);
defaultEngine->GetSubmission(keywordW,
responseType,
NS_LITERAL_STRING("keyword"),
getter_AddRefs(submission));
if (submission) {
nsCOMPtr<nsIInputStream> postData;
submission->GetPostData(getter_AddRefs(postData));
if (aPostData) {
postData.forget(aPostData);
} else if (postData) {
// The submission specifies POST data (i.e. the search
// engine's "method" is POST), but our caller didn't allow
// passing post data back. No point passing back a URL that
// won't load properly.
return NS_ERROR_FAILURE;
}
defaultEngine->GetName(info->mKeywordProviderName);
info->mKeywordAsSent = keywordW;
return submission->GetUri(getter_AddRefs(info->mPreferredURI));
}
}
}
#endif
// out of options
return NS_ERROR_NOT_AVAILABLE;
}
// Helper to deal with passing around uri fixup stuff
nsresult
nsDefaultURIFixup::TryKeywordFixupForURIInfo(const nsACString& aURIString,
nsDefaultURIFixupInfo* aFixupInfo,
nsIInputStream** aPostData)
{
nsCOMPtr<nsIURIFixupInfo> keywordInfo;
nsresult rv = KeywordToURI(aURIString, aPostData,
getter_AddRefs(keywordInfo));
if (NS_SUCCEEDED(rv)) {
keywordInfo->GetKeywordProviderName(aFixupInfo->mKeywordProviderName);
keywordInfo->GetKeywordAsSent(aFixupInfo->mKeywordAsSent);
keywordInfo->GetPreferredURI(getter_AddRefs(aFixupInfo->mPreferredURI));
}
return rv;
}
bool
nsDefaultURIFixup::MakeAlternateURI(nsIURI* aURI)
{
if (!Preferences::GetRootBranch()) {
return false;
}
if (!Preferences::GetBool("browser.fixup.alternate.enabled", true)) {
return false;
}
// Code only works for http. Not for any other protocol including https!
bool isHttp = false;
aURI->SchemeIs("http", &isHttp);
if (!isHttp) {
return false;
}
// Security - URLs with user / password info should NOT be fixed up
nsAutoCString userpass;
aURI->GetUserPass(userpass);
if (!userpass.IsEmpty()) {
return false;
}
// Don't fix up hosts with ports
int32_t port;
aURI->GetPort(&port);
if (port != -1) {
return false;
}
nsAutoCString oldHost;
aURI->GetHost(oldHost);
// Don't fix up 'localhost' because that's confusing:
if (oldHost.EqualsLiteral("localhost")) {
return false;
}
nsAutoCString newHost;
// Count the dots
int32_t numDots = 0;
nsReadingIterator<char> iter;
nsReadingIterator<char> iterEnd;
oldHost.BeginReading(iter);
oldHost.EndReading(iterEnd);
while (iter != iterEnd) {
if (*iter == '.') {
numDots++;
}
++iter;
}
// 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
nsAutoCString prefix("www.");
nsAdoptingCString prefPrefix =
Preferences::GetCString("browser.fixup.alternate.prefix");
if (prefPrefix) {
prefix.Assign(prefPrefix);
}
nsAutoCString suffix(".com");
nsAdoptingCString prefSuffix =
Preferences::GetCString("browser.fixup.alternate.suffix");
if (prefSuffix) {
suffix.Assign(prefSuffix);
}
if (numDots == 0) {
newHost.Assign(prefix);
newHost.Append(oldHost);
newHost.Append(suffix);
} else if (numDots == 1) {
if (!prefix.IsEmpty() &&
oldHost.EqualsIgnoreCase(prefix.get(), prefix.Length())) {
newHost.Assign(oldHost);
newHost.Append(suffix);
} else if (!suffix.IsEmpty()) {
newHost.Assign(prefix);
newHost.Append(oldHost);
} else {
// Do nothing
return false;
}
} else {
// Do nothing
return false;
}
if (newHost.IsEmpty()) {
return false;
}
// Assign the new host string over the old one
aURI->SetHost(newHost);
return true;
}
nsresult
nsDefaultURIFixup::FileURIFixup(const nsACString& aStringURI, nsIURI** aURI)
{
nsAutoCString 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(), nullptr))) {
return NS_OK;
}
}
return NS_ERROR_FAILURE;
}
nsresult
nsDefaultURIFixup::ConvertFileToStringURI(const nsACString& aIn,
nsCString& aResult)
{
bool attemptFixup = false;
#if defined(XP_WIN)
// Check for \ in the url-string or just a drive (PC)
if (aIn.Contains('\\') ||
(aIn.Length() == 2 && (aIn.Last() == ':' || aIn.Last() == '|'))) {
attemptFixup = true;
}
#elif defined(XP_UNIX)
// Check if it starts with / (UNIX)
if (aIn.First() == '/') {
attemptFixup = 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.
nsCOMPtr<nsIFile> filePath;
nsresult rv = NS_NewLocalFile(NS_ConvertUTF8toUTF16(aIn), false,
getter_AddRefs(filePath));
if (NS_SUCCEEDED(rv)) {
NS_GetURLSpecFromFile(filePath, aResult);
return NS_OK;
}
}
return NS_ERROR_FAILURE;
}
nsresult
nsDefaultURIFixup::FixupURIProtocol(const nsACString& aURIString,
nsDefaultURIFixupInfo* aFixupInfo,
nsIURI** aURI)
{
nsAutoCString uriString(aURIString);
*aURI = nullptr;
// 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
// user:pass@no-scheme.com
//
int32_t schemeDelim = uriString.Find("://", 0);
int32_t firstDelim = uriString.FindCharInSet("/:");
if (schemeDelim <= 0 ||
(firstDelim != -1 && schemeDelim > firstDelim)) {
// find host name
int32_t hostPos = uriString.FindCharInSet("/:?#");
if (hostPos == -1) {
hostPos = uriString.Length();
}
// extract host name
nsAutoCString hostSpec;
uriString.Left(hostSpec, hostPos);
// insert url spec corresponding to host name
uriString.InsertLiteral("http://", 0);
aFixupInfo->mFixupChangedProtocol = true;
} // end if checkprotocol
return NS_NewURI(aURI, uriString, nullptr);
}
bool
nsDefaultURIFixup::PossiblyHostPortUrl(const nsACString& 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
// separated 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\-]+)*:
nsACString::const_iterator iterBegin;
nsACString::const_iterator iterEnd;
aUrl.BeginReading(iterBegin);
aUrl.EndReading(iterEnd);
nsACString::const_iterator iter = iterBegin;
while (iter != iterEnd) {
uint32_t chunkSize = 0;
// Parse a chunk of the address
while (iter != iterEnd &&
(*iter == '-' ||
nsCRT::IsAsciiAlpha(*iter) ||
nsCRT::IsAsciiDigit(*iter))) {
++chunkSize;
++iter;
}
if (chunkSize == 0 || iter == iterEnd) {
return false;
}
if (*iter == ':') {
// Go onto checking the for the digits
break;
}
if (*iter != '.') {
// Whatever it is, it ain't a hostname!
return false;
}
++iter;
}
if (iter == iterEnd) {
// No point continuing since there is no colon
return false;
}
++iter;
// Count the number of digits after the colon and before the
// next forward slash (or end of string)
uint32_t digitCount = 0;
while (iter != iterEnd && digitCount <= 5) {
if (nsCRT::IsAsciiDigit(*iter)) {
digitCount++;
} else if (*iter == '/') {
break;
} else {
// Whatever it is, it ain't a port!
return false;
}
++iter;
}
if (digitCount == 0 || digitCount > 5) {
// No digits or more digits than a port would have.
return false;
}
// Yes, it's possibly a host:port url
return true;
}
nsresult
nsDefaultURIFixup::KeywordURIFixup(const nsACString& aURIString,
nsDefaultURIFixupInfo* aFixupInfo,
nsIInputStream** aPostData)
{
// These are keyword formatted strings
// "what is mozilla"
// "what is mozilla?"
// "docshell site:mozilla.org" - has no dot/colon in the first space-separated substring
// "?mozilla" - anything that begins with a question mark
// "?site:mozilla.org docshell"
// Things that have a quote before the first dot/colon
// "mozilla" - checked against a whitelist to see if it's a host or not
// ".mozilla", "mozilla." - ditto
// These are not keyword formatted strings
// "www.blah.com" - first space-separated substring contains a dot, doesn't start with "?"
// "www.blah.com stuff"
// "nonQualifiedHost:80" - first space-separated substring contains a colon, doesn't start with "?"
// "nonQualifiedHost:80 args"
// "nonQualifiedHost?"
// "nonQualifiedHost?args"
// "nonQualifiedHost?some args"
// "blah.com."
// Note: uint32_t(kNotFound) is greater than any actual location
// in practice. So if we cast all locations to uint32_t, then a <
// b guarantees that either b is kNotFound and a is found, or both
// are found and a found before b.
uint32_t firstDotLoc = uint32_t(kNotFound);
uint32_t lastDotLoc = uint32_t(kNotFound);
uint32_t firstColonLoc = uint32_t(kNotFound);
uint32_t firstQuoteLoc = uint32_t(kNotFound);
uint32_t firstSpaceLoc = uint32_t(kNotFound);
uint32_t firstQMarkLoc = uint32_t(kNotFound);
uint32_t lastLSBracketLoc = uint32_t(kNotFound);
uint32_t lastSlashLoc = uint32_t(kNotFound);
uint32_t pos = 0;
uint32_t foundDots = 0;
uint32_t foundColons = 0;
uint32_t foundDigits = 0;
uint32_t foundRSBrackets = 0;
bool looksLikeIpv6 = true;
bool hasAsciiAlpha = false;
nsACString::const_iterator iterBegin;
nsACString::const_iterator iterEnd;
aURIString.BeginReading(iterBegin);
aURIString.EndReading(iterEnd);
nsACString::const_iterator iter = iterBegin;
while (iter != iterEnd) {
if (pos >= 1 && foundRSBrackets == 0) {
if (!(lastLSBracketLoc == 0 &&
(*iter == ':' ||
*iter == '.' ||
*iter == ']' ||
(*iter >= 'a' && *iter <= 'f') ||
(*iter >= 'A' && *iter <= 'F') ||
nsCRT::IsAsciiDigit(*iter)))) {
looksLikeIpv6 = false;
}
}
// If we're at the end of the string or this is the first slash,
// check if the thing before the slash looks like ipv4:
if ((iterEnd - iter == 1 ||
(lastSlashLoc == uint32_t(kNotFound) && *iter == '/')) &&
// Need 2 or 3 dots + only digits
(foundDots == 2 || foundDots == 3) &&
// and they should be all that came before now:
(foundDots + foundDigits == pos ||
// or maybe there was also exactly 1 colon that came after the last dot,
// and the digits, dots and colon were all that came before now:
(foundColons == 1 && firstColonLoc > lastDotLoc &&
foundDots + foundDigits + foundColons == pos))) {
// Hurray, we got ourselves some ipv4!
// At this point, there's no way we will do a keyword lookup, so just bail immediately:
return NS_OK;
}
if (*iter == '.') {
++foundDots;
lastDotLoc = pos;
if (firstDotLoc == uint32_t(kNotFound)) {
firstDotLoc = pos;
}
} else if (*iter == ':') {
++foundColons;
if (firstColonLoc == uint32_t(kNotFound)) {
firstColonLoc = pos;
}
} else if (*iter == ' ' && firstSpaceLoc == uint32_t(kNotFound)) {
firstSpaceLoc = pos;
} else if (*iter == '?' && firstQMarkLoc == uint32_t(kNotFound)) {
firstQMarkLoc = pos;
} else if ((*iter == '\'' || *iter == '"') &&
firstQuoteLoc == uint32_t(kNotFound)) {
firstQuoteLoc = pos;
} else if (*iter == '[') {
lastLSBracketLoc = pos;
} else if (*iter == ']') {
foundRSBrackets++;
} else if (*iter == '/') {
lastSlashLoc = pos;
} else if (nsCRT::IsAsciiAlpha(*iter)) {
hasAsciiAlpha = true;
} else if (nsCRT::IsAsciiDigit(*iter)) {
++foundDigits;
}
pos++;
iter++;
}
if (lastLSBracketLoc > 0 || foundRSBrackets != 1) {
looksLikeIpv6 = false;
}
// If there are only colons and only hexadecimal characters ([a-z][0-9])
// enclosed in [], then don't do a keyword lookup
if (looksLikeIpv6) {
return NS_OK;
}
nsAutoCString asciiHost;
nsAutoCString host;
bool isValidAsciiHost =
aFixupInfo->mFixedURI &&
NS_SUCCEEDED(aFixupInfo->mFixedURI->GetAsciiHost(asciiHost)) &&
!asciiHost.IsEmpty();
bool isValidHost =
aFixupInfo->mFixedURI &&
NS_SUCCEEDED(aFixupInfo->mFixedURI->GetHost(host)) &&
!host.IsEmpty();
nsresult rv = NS_OK;
// We do keyword lookups if a space or quote preceded the dot, colon
// or question mark (or if the latter is not found, or if the input starts
// with a question mark)
if (((firstSpaceLoc < firstDotLoc || firstQuoteLoc < firstDotLoc) &&
(firstSpaceLoc < firstColonLoc || firstQuoteLoc < firstColonLoc) &&
(firstSpaceLoc < firstQMarkLoc || firstQuoteLoc < firstQMarkLoc)) ||
firstQMarkLoc == 0) {
rv = TryKeywordFixupForURIInfo(aFixupInfo->mOriginalInput, aFixupInfo,
aPostData);
// ... or when the host is the same as asciiHost and there are no
// characters from [a-z][A-Z]
} else if (isValidAsciiHost && isValidHost && !hasAsciiAlpha &&
host.EqualsIgnoreCase(asciiHost.get())) {
if (!sDNSFirstForSingleWords) {
rv = TryKeywordFixupForURIInfo(aFixupInfo->mOriginalInput, aFixupInfo,
aPostData);
}
}
// ... or if there is no question mark or colon, and there is either no
// dot, or exactly 1 and it is the first or last character of the input:
else if ((firstDotLoc == uint32_t(kNotFound) ||
(foundDots == 1 && (firstDotLoc == 0 ||
firstDotLoc == aURIString.Length() - 1))) &&
firstColonLoc == uint32_t(kNotFound) &&
firstQMarkLoc == uint32_t(kNotFound)) {
if (isValidAsciiHost && IsDomainWhitelisted(asciiHost, firstDotLoc)) {
return NS_OK;
}
// ... unless there are no dots, and a slash, and alpha characters, and
// this is a valid host:
if (firstDotLoc == uint32_t(kNotFound) &&
lastSlashLoc != uint32_t(kNotFound) &&
hasAsciiAlpha && isValidAsciiHost) {
return NS_OK;
}
// If we get here, we don't have a valid URI, or we did but the
// host is not whitelisted, so we do a keyword search *anyway*:
rv = TryKeywordFixupForURIInfo(aFixupInfo->mOriginalInput, aFixupInfo,
aPostData);
}
return rv;
}
bool
nsDefaultURIFixup::IsDomainWhitelisted(const nsACString& aAsciiHost,
const uint32_t aDotLoc)
{
if (sDNSFirstForSingleWords) {
return true;
}
// Check if this domain is whitelisted as an actual
// domain (which will prevent a keyword query)
// NB: any processing of the host here should stay in sync with
// code in the front-end(s) that set the pref.
nsAutoCString pref("browser.fixup.domainwhitelist.");
if (aDotLoc == aAsciiHost.Length() - 1) {
pref.Append(Substring(aAsciiHost, 0, aAsciiHost.Length() - 1));
} else {
pref.Append(aAsciiHost);
}
return Preferences::GetBool(pref.get(), false);
}
NS_IMETHODIMP
nsDefaultURIFixup::IsDomainWhitelisted(const nsACString& aDomain,
const uint32_t aDotLoc,
bool* aResult)
{
*aResult = IsDomainWhitelisted(aDomain, aDotLoc);
return NS_OK;
}
/* Implementation of nsIURIFixupInfo */
NS_IMPL_ISUPPORTS(nsDefaultURIFixupInfo, nsIURIFixupInfo)
nsDefaultURIFixupInfo::nsDefaultURIFixupInfo(const nsACString& aOriginalInput)
: mFixupChangedProtocol(false)
, mFixupCreatedAlternateURI(false)
{
mOriginalInput = aOriginalInput;
}
nsDefaultURIFixupInfo::~nsDefaultURIFixupInfo()
{
}
NS_IMETHODIMP
nsDefaultURIFixupInfo::GetConsumer(nsISupports** aConsumer)
{
*aConsumer = mConsumer;
NS_IF_ADDREF(*aConsumer);
return NS_OK;
}
NS_IMETHODIMP
nsDefaultURIFixupInfo::SetConsumer(nsISupports* aConsumer)
{
mConsumer = aConsumer;
return NS_OK;
}
NS_IMETHODIMP
nsDefaultURIFixupInfo::GetPreferredURI(nsIURI** aPreferredURI)
{
*aPreferredURI = mPreferredURI;
NS_IF_ADDREF(*aPreferredURI);
return NS_OK;
}
NS_IMETHODIMP
nsDefaultURIFixupInfo::GetFixedURI(nsIURI** aFixedURI)
{
*aFixedURI = mFixedURI;
NS_IF_ADDREF(*aFixedURI);
return NS_OK;
}
NS_IMETHODIMP
nsDefaultURIFixupInfo::GetKeywordProviderName(nsAString& aResult)
{
aResult = mKeywordProviderName;
return NS_OK;
}
NS_IMETHODIMP
nsDefaultURIFixupInfo::GetKeywordAsSent(nsAString& aResult)
{
aResult = mKeywordAsSent;
return NS_OK;
}
NS_IMETHODIMP
nsDefaultURIFixupInfo::GetFixupChangedProtocol(bool* aResult)
{
*aResult = mFixupChangedProtocol;
return NS_OK;
}
NS_IMETHODIMP
nsDefaultURIFixupInfo::GetFixupCreatedAlternateURI(bool* aResult)
{
*aResult = mFixupCreatedAlternateURI;
return NS_OK;
}
NS_IMETHODIMP
nsDefaultURIFixupInfo::GetOriginalInput(nsACString& aResult)
{
aResult = mOriginalInput;
return NS_OK;
}
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