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45caf84cc9778632dc54dd6787780d5fff779b47
qt-creator/src/libs/utils/stringutils.cpp
hjk 45caf84cc9 ProjectExplorer: Fix parsing ports from netstat output on Windows 
Handle IPv6, and do not try to interpret the result as hex.

Change-Id: I700c233d03cc706bc8712ab9fabee75d7f126df3
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
2017-08-24 09:53:00 +00:00

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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#include "stringutils.h"
#include "hostosinfo.h"
#include <utils/algorithm.h>
#include <utils/qtcassert.h>
#include <QDir>
#include <QJsonArray>
#include <QJsonValue>
#include <QRegularExpression>
#include <QSet>
#include <limits.h>
namespace Utils {
QTCREATOR_UTILS_EXPORT QString settingsKey(const QString &category)
{
QString rc(category);
const QChar underscore = '_';
// Remove the sort category "X.Category" -> "Category"
if (rc.size() > 2 && rc.at(0).isLetter() && rc.at(1) == '.')
rc.remove(0, 2);
// Replace special characters
const int size = rc.size();
for (int i = 0; i < size; i++) {
const QChar c = rc.at(i);
if (!c.isLetterOrNumber() && c != underscore)
rc[i] = underscore;
}
return rc;
}
// Figure out length of common start of string ("C:\a", "c:\b" -> "c:\"
static inline int commonPartSize(const QString &s1, const QString &s2)
{
const int size = qMin(s1.size(), s2.size());
for (int i = 0; i < size; i++)
if (s1.at(i) != s2.at(i))
return i;
return size;
}
QTCREATOR_UTILS_EXPORT QString commonPrefix(const QStringList &strings)
{
switch (strings.size()) {
case 0:
return QString();
case 1:
return strings.front();
default:
break;
}
// Figure out common string part: "C:\foo\bar1" "C:\foo\bar2" -> "C:\foo\bar"
int commonLength = INT_MAX;
const int last = strings.size() - 1;
for (int i = 0; i < last; i++)
commonLength = qMin(commonLength, commonPartSize(strings.at(i), strings.at(i + 1)));
if (!commonLength)
return QString();
return strings.at(0).left(commonLength);
}
QTCREATOR_UTILS_EXPORT QString commonPath(const QStringList &files)
{
QStringList appendedSlashes = Utils::transform(files, [](const QString &file) -> QString {
if (!file.endsWith('/'))
return QString(file + '/');
return file;
});
QString common = commonPrefix(appendedSlashes);
// Find common directory part: "C:\foo\bar" -> "C:\foo"
int lastSeparatorPos = common.lastIndexOf('/');
if (lastSeparatorPos == -1)
lastSeparatorPos = common.lastIndexOf('\\');
if (lastSeparatorPos == -1)
return QString();
if (HostOsInfo::isAnyUnixHost() && lastSeparatorPos == 0) // Unix: "/a", "/b" -> '/'
lastSeparatorPos = 1;
common.truncate(lastSeparatorPos);
return common;
}
QTCREATOR_UTILS_EXPORT QString withTildeHomePath(const QString &path)
{
if (HostOsInfo::isWindowsHost())
return path;
static const QString homePath = QDir::homePath();
QFileInfo fi(QDir::cleanPath(path));
QString outPath = fi.absoluteFilePath();
if (outPath.startsWith(homePath))
outPath = '~' + outPath.mid(homePath.size());
else
outPath = path;
return outPath;
}
static bool validateVarName(const QString &varName)
{
return !varName.startsWith("JS:");
}
bool AbstractMacroExpander::expandNestedMacros(const QString &str, int *pos, QString *ret)
{
QString varName;
QString pattern, replace;
QString defaultValue;
QString *currArg = &varName;
QChar prev;
QChar c;
bool replaceAll = false;
int i = *pos;
int strLen = str.length();
varName.reserve(strLen - i);
for (; i < strLen; prev = c) {
c = str.at(i++);
if (c == '\\' && i < strLen && validateVarName(varName)) {
c = str.at(i++);
// For the replacement, do not skip the escape sequence when followed by a digit.
// This is needed for enabling convenient capture group replacement,
// like %{var/(.)(.)/\2\1}, without escaping the placeholders.
if (currArg == &replace && c.isDigit())
*currArg += '\\';
*currArg += c;
} else if (c == '}') {
if (varName.isEmpty()) { // replace "%{}" with "%"
*ret = QString('%');
*pos = i;
return true;
}
QSet<AbstractMacroExpander*> seen;
if (resolveMacro(varName, ret, seen)) {
*pos = i;
if (!pattern.isEmpty() && currArg == &replace) {
const QRegularExpression regexp(pattern);
if (regexp.isValid()) {
if (replaceAll) {
ret->replace(regexp, replace);
} else {
// There isn't an API for replacing once...
const QRegularExpressionMatch match = regexp.match(*ret);
if (match.hasMatch()) {
*ret = ret->left(match.capturedStart(0))
+ match.captured(0).replace(regexp, replace)
+ ret->mid(match.capturedEnd(0));
}
}
}
}
return true;
}
if (!defaultValue.isEmpty()) {
*pos = i;
*ret = defaultValue;
return true;
}
return false;
} else if (c == '{' && prev == '%') {
if (!expandNestedMacros(str, &i, ret))
return false;
varName.chop(1);
varName += *ret;
} else if (currArg == &varName && c == '-' && prev == ':' && validateVarName(varName)) {
varName.chop(1);
currArg = &defaultValue;
} else if (currArg == &varName && c == '/' && validateVarName(varName)) {
currArg = &pattern;
if (i < strLen && str.at(i) == '/') {
++i;
replaceAll = true;
}
} else if (currArg == &pattern && c == '/') {
currArg = &replace;
} else {
*currArg += c;
}
}
return false;
}
int AbstractMacroExpander::findMacro(const QString &str, int *pos, QString *ret)
{
forever {
int openPos = str.indexOf("%{", *pos);
if (openPos < 0)
return 0;
int varPos = openPos + 2;
if (expandNestedMacros(str, &varPos, ret)) {
*pos = openPos;
return varPos - openPos;
}
// An actual expansion may be nested into a "false" one,
// so we continue right after the last %{.
*pos = openPos + 2;
}
}
QTCREATOR_UTILS_EXPORT void expandMacros(QString *str, AbstractMacroExpander *mx)
{
QString rsts;
for (int pos = 0; int len = mx->findMacro(*str, &pos, &rsts); ) {
str->replace(pos, len, rsts);
pos += rsts.length();
}
}
QTCREATOR_UTILS_EXPORT QString expandMacros(const QString &str, AbstractMacroExpander *mx)
{
QString ret = str;
expandMacros(&ret, mx);
return ret;
}
QTCREATOR_UTILS_EXPORT QString stripAccelerator(const QString &text)
{
QString res = text;
for (int index = res.indexOf('&'); index != -1; index = res.indexOf('&', index + 1))
res.remove(index, 1);
return res;
}
QTCREATOR_UTILS_EXPORT bool readMultiLineString(const QJsonValue &value, QString *out)
{
QTC_ASSERT(out, return false);
if (value.isString()) {
*out = value.toString();
} else if (value.isArray()) {
QJsonArray array = value.toArray();
QStringList lines;
foreach (const QJsonValue &v, array) {
if (!v.isString())
return false;
lines.append(v.toString());
}
*out = lines.join(QLatin1Char('\n'));
} else {
return false;
}
return true;
}
QTCREATOR_UTILS_EXPORT int parseUsedPortFromNetstatOutput(const QByteArray &line)
{
const QByteArray trimmed = line.trimmed();
int base = 0;
QByteArray portString;
if (trimmed.startsWith("TCP") || trimmed.startsWith("UDP")) {
// Windows. Expected output is something like
//
// Active Connections
//
// Proto Local Address Foreign Address State
// TCP 0.0.0.0:80 0.0.0.0:0 LISTENING
// TCP 0.0.0.0:113 0.0.0.0:0 LISTENING
// [...]
// TCP 10.9.78.4:14714 0.0.0.0:0 LISTENING
// TCP 10.9.78.4:50233 12.13.135.180:993 ESTABLISHED
// [...]
// TCP [::]:445 [::]:0 LISTENING
// TCP 192.168.0.80:51905 169.55.74.50:443 ESTABLISHED
// UDP [fe80::880a:2932:8dff:a858%6]:1900 *:*
const int firstBracketPos = trimmed.indexOf('[');
int colonPos = -1;
if (firstBracketPos == -1) {
colonPos = trimmed.indexOf(':'); // IPv4
} else {
// jump over host part
const int secondBracketPos = trimmed.indexOf(']', firstBracketPos + 1);
colonPos = trimmed.indexOf(':', secondBracketPos);
}
const int firstDigitPos = colonPos + 1;
const int spacePos = trimmed.indexOf(' ', firstDigitPos);
if (spacePos < 0)
return -1;
const int len = spacePos - firstDigitPos;
base = 10;
portString = trimmed.mid(firstDigitPos, len);
} else {
// Expected output on Linux something like
//
// sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt ...
// 0: 00000000:2805 00000000:0000 0A 00000000:00000000 00:00000000 00000000 ...
//
const int firstColonPos = trimmed.indexOf(':');
if (firstColonPos < 0)
return -1;
const int secondColonPos = trimmed.indexOf(':', firstColonPos + 1);
if (secondColonPos < 0)
return -1;
const int spacePos = trimmed.indexOf(' ', secondColonPos + 1);
if (spacePos < 0)
return -1;
const int len = spacePos - secondColonPos - 1;
base = 16;
portString = trimmed.mid(secondColonPos + 1, len);
}
bool ok = true;
const int port = portString.toInt(&ok, base);
if (!ok) {
qWarning("%s: Unexpected string '%s' is not a port. Tried to read from '%s'",
Q_FUNC_INFO, line.data(), portString.data());
return -1;
}
return port;
}
} // namespace Utils
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