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gecko-dev/docshell/base/nsDefaultURIFixup.cpp
Nicholas Nethercote 18fae65f38 Bug 1563139 - Remove StaticPrefs.h. r=glandium 
This requires replacing inclusions of it with inclusions of more specific prefs
files.

The exception is that StaticPrefsAll.h, which is equivalent to StaticPrefs.h,
and is used in `Codegen.py` because doing something smarter is tricky and
suitable for a follow-up. As a result, any change to StaticPrefList.yaml will
still trigger recompilation of all the generated DOM bindings files, but that's
still a big improvement over trigger recompilation of every file that uses
static prefs.

Most of the changes in this commit are very boring. The only changes that are
not boring are modules/libpref/*, Codegen.py, and ServoBindings.toml.

Differential Revision: https://phabricator.services.mozilla.com/D39138

--HG--
extra : moz-landing-system : lando
2019-07-26 01:10:23 +00:00

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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 "nsIFile.h"
#include <algorithm>
#include "nsISearchService.h"
#include "nsIURIFixup.h"
#include "nsIURIMutator.h"
#include "nsIWebNavigation.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/TextUtils.h"
#include "mozilla/Tokenizer.h"
#include "mozilla/Unused.h"
#include "nsIObserverService.h"
#include "nsXULAppAPI.h"
#include "mozilla/StaticPrefs_browser.h"
#include "mozilla/StaticPrefs_keyword.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)
nsDefaultURIFixup::nsDefaultURIFixup() {}
nsDefaultURIFixup::~nsDefaultURIFixup() {}
NS_IMETHODIMP
nsDefaultURIFixup::CreateExposableURI(nsIURI* aURI, nsIURI** aReturn) {
NS_ENSURE_ARG_POINTER(aURI);
NS_ENSURE_ARG_POINTER(aReturn);
nsAutoCString userPass;
aURI->GetUserPass(userPass);
// most of the time we can just AddRef and return
if (userPass.IsEmpty()) {
*aReturn = aURI;
NS_ADDREF(*aReturn);
return NS_OK;
}
// Rats, we have to massage the URI
nsCOMPtr<nsIURI> uri = aURI;
Unused << NS_MutateURI(uri).SetUserPass(EmptyCString()).Finalize(uri);
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;
}
// Assume that 1 tab is accidental, but more than 1 implies this is
// supposed to be tab-separated content.
static bool MaybeTabSeparatedContent(const nsCString& aStringURI) {
auto firstTab = aStringURI.FindChar('\t');
return firstTab != kNotFound && aStringURI.RFindChar('\t') != firstTab;
}
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 and tabs that might be on each end:
uriString.Trim(" \t");
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.EqualsLiteral("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.EqualsLiteral("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;
}
}
// Fix up common scheme typos.
if (StaticPrefs::browser_fixup_typo_scheme() &&
(aFixupFlags & FIXUP_FLAG_FIX_SCHEME_TYPOS)) {
// Fast-path for common cases.
if (scheme.IsEmpty() || scheme.EqualsLiteral("http") ||
scheme.EqualsLiteral("https") || scheme.EqualsLiteral("ftp") ||
scheme.EqualsLiteral("file")) {
// Do nothing.
} else if (scheme.EqualsLiteral("ttp")) {
// ttp -> http.
uriString.ReplaceLiteral(0, 3, "http");
scheme.AssignLiteral("http");
info->mFixupChangedProtocol = true;
} else if (scheme.EqualsLiteral("htp")) {
// htp -> http.
uriString.ReplaceLiteral(0, 3, "http");
scheme.AssignLiteral("http");
info->mFixupChangedProtocol = true;
} else if (scheme.EqualsLiteral("ttps")) {
// ttps -> https.
uriString.ReplaceLiteral(0, 4, "https");
scheme.AssignLiteral("https");
info->mFixupChangedProtocol = true;
} else if (scheme.EqualsLiteral("tps")) {
// tps -> https.
uriString.ReplaceLiteral(0, 3, "https");
scheme.AssignLiteral("https");
info->mFixupChangedProtocol = true;
} else if (scheme.EqualsLiteral("ps")) {
// ps -> https.
uriString.ReplaceLiteral(0, 2, "https");
scheme.AssignLiteral("https");
info->mFixupChangedProtocol = true;
} else if (scheme.EqualsLiteral("htps")) {
// htps -> https.
uriString.ReplaceLiteral(0, 4, "https");
scheme.AssignLiteral("https");
info->mFixupChangedProtocol = true;
} else if (scheme.EqualsLiteral("ile")) {
// ile -> file.
uriString.ReplaceLiteral(0, 3, "file");
scheme.AssignLiteral("file");
info->mFixupChangedProtocol = true;
} else if (scheme.EqualsLiteral("le")) {
// le -> file.
uriString.ReplaceLiteral(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;
extHandler = do_GetService(NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "default");
if (!scheme.IsEmpty()) {
ioService->GetProtocolHandler(scheme.get(), getter_AddRefs(ourHandler));
} else {
ourHandler = extHandler;
}
if (ourHandler != extHandler || !PossiblyHostPortUrl(uriString)) {
// Just try to create an URL out of it
rv = NS_NewURI(getter_AddRefs(info->mFixedURI), uriString);
if (!info->mFixedURI && rv != NS_ERROR_MALFORMED_URI) {
return rv;
}
}
if (info->mFixedURI && ourHandler == extHandler &&
StaticPrefs::keyword_enabled() &&
(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;
}
// Note: this rv gets returned at the end of this method if we don't fix up
// the protocol and don't do a keyword fixup after this (because the pref
// or the flags passed might not let us).
rv = NS_OK;
// Avoid fixing up content that looks like tab-separated values
if (!MaybeTabSeparatedContent(uriString)) {
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 (StaticPrefs::keyword_enabled() &&
(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 (StaticPrefs::keyword_enabled() &&
(aFixupFlags & FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP)) {
rv = TryKeywordFixupForURIInfo(aStringURI, info, aPostData);
}
return rv;
}
NS_IMETHODIMP
nsDefaultURIFixup::WebNavigationFlagsToFixupFlags(const nsACString& aStringURI,
uint32_t aDocShellFlags,
uint32_t* aFixupFlags) {
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), aStringURI);
if (uri) {
aDocShellFlags &= ~nsIWebNavigation::LOAD_FLAGS_ALLOW_THIRD_PARTY_FIXUP;
}
*aFixupFlags = 0;
if (aDocShellFlags & nsIWebNavigation::LOAD_FLAGS_ALLOW_THIRD_PARTY_FIXUP) {
*aFixupFlags |= FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP;
}
if (aDocShellFlags & nsIWebNavigation::LOAD_FLAGS_FIXUP_SCHEME_TYPOS) {
*aFixupFlags |= FIXUP_FLAG_FIX_SCHEME_TYPOS;
}
return NS_OK;
}
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;
}
RefPtr<nsIInputStream> postData;
Maybe<ipc::URIParams> uri;
nsAutoString providerName;
if (!contentChild->SendKeywordToURI(keyword, &providerName, &postData,
&uri)) {
return NS_ERROR_FAILURE;
}
CopyUTF8toUTF16(keyword, info->mKeywordAsSent);
info->mKeywordProviderName = providerName;
if (aPostData) {
postData.forget(aPostData);
}
nsCOMPtr<nsIURI> temp = DeserializeURI(uri);
info->mPreferredURI = temp.forget();
return NS_OK;
}
// Try falling back to the search service's default search engine
nsCOMPtr<nsISearchService> 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));
}
}
}
// 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(nsCOMPtr<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!
if (!net::SchemeIsHTTP(aURI)) {
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.");
nsAutoCString prefPrefix;
nsresult rv =
Preferences::GetCString("browser.fixup.alternate.prefix", prefPrefix);
if (NS_SUCCEEDED(rv)) {
prefix.Assign(prefPrefix);
}
nsAutoCString suffix(".com");
nsAutoCString prefSuffix;
rv = Preferences::GetCString("browser.fixup.alternate.suffix", 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.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
Unused << NS_MutateURI(aURI).SetHost(newHost).Finalize(aURI);
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()))) {
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("://");
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);
}
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 == '-' || IsAsciiAlpha(*iter) || 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 (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') ||
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 (IsAsciiAlpha(*iter)) {
hasAsciiAlpha = true;
} else if (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 displayHost;
bool isValidHost =
aFixupInfo->mFixedURI &&
NS_SUCCEEDED(aFixupInfo->mFixedURI->GetAsciiHost(asciiHost)) &&
!asciiHost.IsEmpty();
bool isValidDisplayHost =
aFixupInfo->mFixedURI &&
NS_SUCCEEDED(aFixupInfo->mFixedURI->GetDisplayHost(displayHost)) &&
!displayHost.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 asciiHost is the same as displayHost and there are no
// characters from [a-z][A-Z]
} else if (isValidHost && isValidDisplayHost && !hasAsciiAlpha &&
asciiHost.EqualsIgnoreCase(displayHost.get())) {
if (!StaticPrefs::browser_fixup_dns_first_for_single_words()) {
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 (isValidHost && 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 && isValidHost) {
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 (StaticPrefs::browser_fixup_dns_first_for_single_words()) {
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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