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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "util.h"
#include <signal.h>
#include <sys/types.h>
#ifdef HAVE_PWD_H
# include <pwd.h>
#endif // HAVE_PWD_H
#include <cerrno>
#include <cassert>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <sstream>
#include <ostream>
#include <algorithm>
#include <fstream>
#include <iomanip>
#include "SimpleRandomizer.h"
#include "File.h"
#include "Randomizer.h"
#include "a2netcompat.h"
#include "BitfieldMan.h"
#include "DefaultDiskWriter.h"
#include "FatalException.h"
#include "FileEntry.h"
#include "A2STR.h"
#include "array_fun.h"
#include "bitfield.h"
#include "DownloadHandlerConstants.h"
#include "RequestGroup.h"
#include "LogFactory.h"
#include "Logger.h"
#include "Option.h"
#include "DownloadContext.h"
#include "BufferedFile.h"
#include "SocketCore.h"
#include "prefs.h"
#ifdef ENABLE_MESSAGE_DIGEST
# include "MessageDigest.h"
# include "message_digest_helper.h"
#endif // ENABLE_MESSAGE_DIGEST
// For libc6 which doesn't define ULLONG_MAX properly because of broken limits.h
#ifndef ULLONG_MAX
# define ULLONG_MAX 18446744073709551615ULL
#endif // ULLONG_MAX
namespace aria2 {
#ifdef __MINGW32__
namespace {
int utf8ToWChar(wchar_t* out, size_t outLength, const char* src)
{
return MultiByteToWideChar(CP_UTF8, 0, src, -1, out, outLength);
}
} // namespace
namespace {
int ansiToWChar(wchar_t* out, size_t outLength, const char* src)
{
return MultiByteToWideChar(CP_ACP, 0, src, -1, out, outLength);
}
} // namespace
namespace {
int wCharToUtf8(char* out, size_t outLength, const wchar_t* src)
{
return WideCharToMultiByte(CP_UTF8, 0, src, -1, out, outLength, 0, 0);
}
} // namespace
namespace {
int wCharToAnsi(char* out, size_t outLength, const wchar_t* src)
{
return WideCharToMultiByte(CP_ACP, 0, src, -1, out, outLength, 0, 0);
}
} // namespace
std::wstring utf8ToWChar(const char* src)
{
int len = utf8ToWChar(0, 0, src);
if(len == 0) {
abort();
}
array_ptr<wchar_t> buf(new wchar_t[len]);
len = utf8ToWChar(buf, len, src);
if(len == 0) {
abort();
} else {
std::wstring dest(buf);
return dest;
}
}
std::wstring utf8ToWChar(const std::string& src)
{
return utf8ToWChar(src.c_str());
}
std::string utf8ToNative(const std::string& src)
{
std::wstring wsrc = utf8ToWChar(src);
int len = wCharToAnsi(0, 0, wsrc.c_str());
if(len == 0) {
abort();
}
array_ptr<char> buf(new char[len]);
len = wCharToAnsi(buf, len, wsrc.c_str());
if(len == 0) {
abort();
} else {
std::string dest(buf);
return dest;
}
}
std::string wCharToUtf8(const std::wstring& wsrc)
{
int len = wCharToUtf8(0, 0, wsrc.c_str());
if(len == 0) {
abort();
}
array_ptr<char> buf(new char[len]);
len = wCharToUtf8(buf, len, wsrc.c_str());
if(len == 0) {
abort();
} else {
std::string dest(buf);
return dest;
}
}
std::string nativeToUtf8(const std::string& src)
{
int len = ansiToWChar(0, 0, src.c_str());
if(len == 0) {
abort();
}
array_ptr<wchar_t> buf(new wchar_t[len]);
len = ansiToWChar(buf, len, src.c_str());
if(len == 0) {
abort();
} else {
return wCharToUtf8(std::wstring(buf));
}
}
#endif // __MINGW32__
namespace util {
const std::string DEFAULT_STRIP_CHARSET("\r\n\t ");
std::string strip(const std::string& str, const std::string& chars)
{
std::pair<std::string::const_iterator,
std::string::const_iterator> p =
stripIter(str.begin(), str.end(), chars);
return std::string(p.first, p.second);
}
std::string itos(int64_t value, bool comma)
{
bool flag = false;
std::string str;
if(value < 0) {
if(value == INT64_MIN) {
if(comma) {
str = "-9,223,372,036,854,775,808";
} else {
str = "-9223372036854775808";
}
return str;
}
flag = true;
value = -value;
}
str = uitos(value, comma);
if(flag) {
str.insert(str.begin(), '-');
}
return str;
}
int64_t difftv(struct timeval tv1, struct timeval tv2) {
if((tv1.tv_sec < tv2.tv_sec) ||
((tv1.tv_sec == tv2.tv_sec) && (tv1.tv_usec < tv2.tv_usec))) {
return 0;
}
return ((int64_t)(tv1.tv_sec-tv2.tv_sec)*1000000+
tv1.tv_usec-tv2.tv_usec);
}
int32_t difftvsec(struct timeval tv1, struct timeval tv2) {
if(tv1.tv_sec < tv2.tv_sec) {
return 0;
}
return tv1.tv_sec-tv2.tv_sec;
}
std::string replace(const std::string& target, const std::string& oldstr, const std::string& newstr) {
if(target.empty() || oldstr.empty()) {
return target;
}
std::string result;
std::string::size_type p = 0;
std::string::size_type np = target.find(oldstr);
while(np != std::string::npos) {
result.append(target.begin()+p, target.begin()+np);
result += newstr;
p = np+oldstr.size();
np = target.find(oldstr, p);
}
result.append(target.begin()+p, target.end());
return result;
}
bool isAlpha(const char c)
{
return ('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z');
}
bool isDigit(const char c)
{
return '0' <= c && c <= '9';
}
bool isHexDigit(const char c)
{
return isDigit(c) || ('A' <= c && c <= 'F') || ('a' <= c && c <= 'f');
}
bool isHexDigit(const std::string& s)
{
for(std::string::const_iterator i = s.begin(), eoi = s.end(); i != eoi; ++i) {
if(!isHexDigit(*i)) {
return false;
}
}
return true;
}
bool inRFC3986ReservedChars(const char c)
{
static const char reserved[] = {
':' , '/' , '?' , '#' , '[' , ']' , '@',
'!' , '$' , '&' , '\'' , '(' , ')',
'*' , '+' , ',' , ';' , '=' };
return std::find(vbegin(reserved), vend(reserved), c) != vend(reserved);
}
bool inRFC3986UnreservedChars(const char c)
{
static const char unreserved[] = { '-', '.', '_', '~' };
return isAlpha(c) || isDigit(c) ||
std::find(vbegin(unreserved), vend(unreserved), c) != vend(unreserved);
}
bool inRFC2978MIMECharset(const char c)
{
static const char chars[] = {
'!', '#', '$', '%', '&',
'\'', '+', '-', '^', '_',
'`', '{', '}', '~'
};
return isAlpha(c) || isDigit(c) ||
std::find(vbegin(chars), vend(chars), c) != vend(chars);
}
bool inRFC2616HttpToken(const char c)
{
static const char chars[] = {
'!', '#', '$', '%', '&', '\'', '*', '+', '-', '.',
'^', '_', '`', '|', '~'
};
return isAlpha(c) || isDigit(c) ||
std::find(vbegin(chars), vend(chars), c) != vend(chars);
}
bool isLws(const char c)
{
return c == ' ' || c == '\t';
}
bool isCRLF(const char c)
{
return c == '\r' || c == '\n';
}
namespace {
bool isUtf8Tail(unsigned char ch)
{
return in(ch, 0x80u, 0xbfu);
}
} // namespace
bool isUtf8(const std::string& str)
{
for(std::string::const_iterator s = str.begin(), eos = str.end(); s != eos;
++s) {
unsigned char firstChar = *s;
// See ABNF in http://tools.ietf.org/search/rfc3629#section-4
if(in(firstChar, 0x20u, 0x7eu) ||
firstChar == 0x08u || // \b
firstChar == 0x09u || // \t
firstChar == 0x0au || // \n
firstChar == 0x0cu || // \f
firstChar == 0x0du // \r
) {
// UTF8-1 (without ctrl chars)
} else if(in(firstChar, 0xc2u, 0xdfu)) {
// UTF8-2
if(++s == eos || !isUtf8Tail(*s)) {
return false;
}
} else if(0xe0u == firstChar) {
// UTF8-3
if(++s == eos || !in(static_cast<unsigned char>(*s), 0xa0u, 0xbfu) ||
++s == eos || !isUtf8Tail(*s)) {
return false;
}
} else if(in(firstChar, 0xe1u, 0xecu) || in(firstChar, 0xeeu, 0xefu)) {
// UTF8-3
if(++s == eos || !isUtf8Tail(*s) ||
++s == eos || !isUtf8Tail(*s)) {
return false;
}
} else if(0xedu == firstChar) {
// UTF8-3
if(++s == eos || !in(static_cast<unsigned char>(*s), 0x80u, 0x9fu) ||
++s == eos || !isUtf8Tail(*s)) {
return false;
}
} else if(0xf0u == firstChar) {
// UTF8-4
if(++s == eos || !in(static_cast<unsigned char>(*s), 0x90u, 0xbfu) ||
++s == eos || !isUtf8Tail(*s) ||
++s == eos || !isUtf8Tail(*s)) {
return false;
}
} else if(in(firstChar, 0xf1u, 0xf3u)) {
// UTF8-4
if(++s == eos || !isUtf8Tail(*s) ||
++s == eos || !isUtf8Tail(*s) ||
++s == eos || !isUtf8Tail(*s)) {
return false;
}
} else if(0xf4u == firstChar) {
// UTF8-4
if(++s == eos || !in(static_cast<unsigned char>(*s), 0x80u, 0x8fu) ||
++s == eos || !isUtf8Tail(*s) ||
++s == eos || !isUtf8Tail(*s)) {
return false;
}
} else {
return false;
}
}
return true;
}
std::string percentEncode(const unsigned char* target, size_t len)
{
std::string dest;
for(size_t i = 0; i < len; ++i) {
if(inRFC3986UnreservedChars(target[i])) {
dest += target[i];
} else {
dest.append(fmt("%%%02X", target[i]));
}
}
return dest;
}
std::string percentEncode(const std::string& target)
{
return percentEncode(reinterpret_cast<const unsigned char*>(target.c_str()),
target.size());
}
std::string percentEncodeMini(const std::string& src)
{
std::string result;
for(std::string::const_iterator i = src.begin(), eoi = src.end(); i != eoi;
++i) {
// Non-Printable ASCII and non-ASCII chars + some ASCII chars.
unsigned char c = *i;
if(in(c, 0x00u, 0x20u) || c >= 0x7fu ||
// Chromium escapes following characters. Firefox4 escapes
// more.
c == '"' || c == '<' || c == '>') {
result += fmt("%%%02X", c);
} else {
result += c;
}
}
return result;
}
std::string torrentPercentEncode(const unsigned char* target, size_t len) {
std::string dest;
for(size_t i = 0; i < len; ++i) {
if(isAlpha(target[i]) || isDigit(target[i])) {
dest += target[i];
} else {
dest.append(fmt("%%%02X", target[i]));
}
}
return dest;
}
std::string torrentPercentEncode(const std::string& target)
{
return torrentPercentEncode
(reinterpret_cast<const unsigned char*>(target.c_str()), target.size());
}
std::string percentDecode
(std::string::const_iterator first, std::string::const_iterator last)
{
std::string result;
for(; first != last; ++first) {
if(*first == '%') {
if(first+1 != last && first+2 != last &&
isHexDigit(*(first+1)) && isHexDigit(*(first+2))) {
result += parseInt(std::string(first+1, first+3), 16);
first += 2;
} else {
result += *first;
}
} else {
result += *first;
}
}
return result;
}
std::string toHex(const unsigned char* src, size_t len) {
std::string out(len*2, '\0');
std::string::iterator o = out.begin();
const unsigned char* last = src+len;
for(const unsigned char* i = src; i != last; ++i) {
*o = (*i >> 4);
*(o+1) = (*i)&0x0fu;
for(int j = 0; j < 2; ++j) {
if(*o < 10) {
*o += '0';
} else {
*o += 'a'-10;
}
++o;
}
}
return out;
}
std::string toHex(const char* src, size_t len)
{
return toHex(reinterpret_cast<const unsigned char*>(src), len);
}
std::string toHex(const std::string& src)
{
return toHex(reinterpret_cast<const unsigned char*>(src.c_str()), src.size());
}
unsigned int hexCharToUInt(unsigned char ch)
{
if('a' <= ch && ch <= 'f') {
ch -= 'a';
ch += 10;
} else if('A' <= ch && ch <= 'F') {
ch -= 'A';
ch += 10;
} else if('0' <= ch && ch <= '9') {
ch -= '0';
} else {
ch = 255;
}
return ch;
}
FILE* openFile(const std::string& filename, const std::string& mode) {
FILE* file = fopen(filename.c_str(), mode.c_str());
return file;
}
bool isPowerOf(int num, int base) {
if(base <= 0) { return false; }
if(base == 1) { return true; }
while(num%base == 0) {
num /= base;
if(num == 1) {
return true;
}
}
return false;
}
std::string secfmt(time_t sec) {
time_t tsec = sec;
std::string str;
if(sec >= 3600) {
str = fmt("%" PRId64 "h", static_cast<int64_t>(sec/3600));
sec %= 3600;
}
if(sec >= 60) {
str += fmt("%dm", static_cast<int>(sec/60));
sec %= 60;
}
if(sec || tsec == 0) {
str += fmt("%ds", static_cast<int>(sec));
}
return str;
}
int getNum(const char* buf, int offset, size_t length) {
char* temp = new char[length+1];
memcpy(temp, buf+offset, length);
temp[length] = '\0';
int x = strtol(temp, 0, 10);
delete [] temp;
return x;
}
namespace {
template<typename T, typename F>
bool parseLong(T& res, F f, const std::string& s, int base)
{
if(s.empty()) {
return false;
}
char* endptr;
errno = 0;
res = f(s.c_str(), &endptr, base);
if(errno == ERANGE) {
return false;
}
if(*endptr != '\0') {
for(const char* i = endptr, *eoi = s.c_str()+s.size(); i < eoi; ++i) {
if(!isspace(*i)) {
return false;
}
}
}
return true;
}
} // namespace
bool parseIntNoThrow(int32_t& res, const std::string& s, int base)
{
long int t;
if(parseLong(t, strtol, s, base) &&
t >= std::numeric_limits<int32_t>::min() &&
t <= std::numeric_limits<int32_t>::max()) {
res = t;
return true;
} else {
return false;
}
}
int32_t parseInt(const std::string& s, int base)
{
int32_t res;
if(parseIntNoThrow(res, s, base)) {
return res;
} else {
throw DL_ABORT_EX
(fmt("Failed to convert string into 32bit signed integer. '%s'",
s.c_str()));
}
}
bool parseUIntNoThrow(uint32_t& res, const std::string& s, int base)
{
long int t;
if(parseLong(t, strtol, s, base) &&
t >= 0 &&
t <= std::numeric_limits<int32_t>::max()) {
res = t;
return true;
} else {
return false;
}
}
uint32_t parseUInt(const std::string& s, int base)
{
uint32_t res;
if(parseUIntNoThrow(res, s, base)) {
return res;
} else {
throw DL_ABORT_EX
(fmt("Failed to convert string into 32bit unsigned integer. '%s'",
s.c_str()));
}
}
bool parseLLIntNoThrow(int64_t& res, const std::string& s, int base)
{
long long int t;
if(parseLong(t, strtoll, s, base) &&
t >= std::numeric_limits<int64_t>::min() &&
t <= std::numeric_limits<int64_t>::max()) {
res = t;
return true;
} else {
return false;
}
}
int64_t parseLLInt(const std::string& s, int base)
{
int64_t res;
if(parseLLIntNoThrow(res, s, base)) {
return res;
} else {
throw DL_ABORT_EX
(fmt("Failed to convert string into 64bit signed integer. '%s'",
s.c_str()));
}
}
void parseIntSegments(SegList<int>& sgl, const std::string& src)
{
for(std::string::const_iterator i = src.begin(), eoi = src.end(); i != eoi;) {
std::string::const_iterator j = std::find(i, eoi, ',');
if(j == i) {
++i;
continue;
}
std::string::const_iterator p = std::find(i, j, '-');
if(p == j) {
int a = parseInt(std::string(i, j));
sgl.add(a, a+1);
} else if(p == i || p+1 == j) {
throw DL_ABORT_EX(fmt(MSG_INCOMPLETE_RANGE, std::string(i, j).c_str()));
} else {
int a = parseInt(std::string(i, p));
int b = parseInt(std::string(p+1, j));
sgl.add(a, b+1);
}
if(j == eoi) {
break;
}
i = j+1;
}
}
namespace {
void computeHeadPieces
(std::vector<size_t>& indexes,
const std::vector<SharedHandle<FileEntry> >& fileEntries,
size_t pieceLength,
int64_t head)
{
if(head == 0) {
return;
}
for(std::vector<SharedHandle<FileEntry> >::const_iterator fi =
fileEntries.begin(), eoi = fileEntries.end(); fi != eoi; ++fi) {
if((*fi)->getLength() == 0) {
continue;
}
size_t lastIndex =
((*fi)->getOffset()+std::min(head, (*fi)->getLength())-1)/pieceLength;
for(size_t index = (*fi)->getOffset()/pieceLength;
index <= lastIndex; ++index) {
indexes.push_back(index);
}
}
}
} // namespace
namespace {
void computeTailPieces
(std::vector<size_t>& indexes,
const std::vector<SharedHandle<FileEntry> >& fileEntries,
size_t pieceLength,
int64_t tail)
{
if(tail == 0) {
return;
}
for(std::vector<SharedHandle<FileEntry> >::const_iterator fi =
fileEntries.begin(), eoi = fileEntries.end(); fi != eoi; ++fi) {
if((*fi)->getLength() == 0) {
continue;
}
int64_t endOffset = (*fi)->getLastOffset();
size_t fromIndex =
(endOffset-1-(std::min(tail, (*fi)->getLength())-1))/pieceLength;
for(size_t index = fromIndex; index <= (endOffset-1)/pieceLength;
++index) {
indexes.push_back(index);
}
}
}
} // namespace
void parsePrioritizePieceRange
(std::vector<size_t>& result, const std::string& src,
const std::vector<SharedHandle<FileEntry> >& fileEntries,
size_t pieceLength,
int64_t defaultSize)
{
std::vector<size_t> indexes;
std::vector<Scip> parts;
splitIter(src.begin(), src.end(), std::back_inserter(parts), ',', true);
for(std::vector<Scip>::const_iterator i = parts.begin(),
eoi = parts.end(); i != eoi; ++i) {
if(util::streq((*i).first, (*i).second, "head")) {
computeHeadPieces(indexes, fileEntries, pieceLength, defaultSize);
} else if(util::startsWith((*i).first, (*i).second, "head=")) {
std::string sizestr((*i).first+5, (*i).second);
computeHeadPieces(indexes, fileEntries, pieceLength,
std::max((int64_t)0, getRealSize(sizestr)));
} else if(util::streq((*i).first, (*i).second, "tail")) {
computeTailPieces(indexes, fileEntries, pieceLength, defaultSize);
} else if(util::startsWith((*i).first, (*i).second, "tail=")) {
std::string sizestr((*i).first+5, (*i).second);
computeTailPieces(indexes, fileEntries, pieceLength,
std::max((int64_t)0, getRealSize(sizestr)));
} else {
throw DL_ABORT_EX(fmt("Unrecognized token %s",
std::string((*i).first, (*i).second).c_str()));
}
}
std::sort(indexes.begin(), indexes.end());
indexes.erase(std::unique(indexes.begin(), indexes.end()), indexes.end());
result.insert(result.end(), indexes.begin(), indexes.end());
}
// Converts ISO/IEC 8859-1 string to UTF-8 string. If there is a
// character not in ISO/IEC 8859-1, returns empty string.
std::string iso8859ToUtf8(const std::string& src)
{
std::string dest;
for(std::string::const_iterator itr = src.begin(), eoi = src.end();
itr != eoi; ++itr) {
unsigned char c = *itr;
if(0xa0u <= c) {
if(c <= 0xbfu) {
dest += 0xc2u;
} else {
dest += 0xc3u;
}
dest += c&(~0x40u);
} else if(0x80u <= c && c <= 0x9fu) {
return A2STR::NIL;
} else {
dest += c;
}
}
return dest;
}
namespace {
template<typename OutputIterator>
void parseParam(OutputIterator out, const std::string& header)
{
for(std::string::const_iterator i = header.begin(), eoi = header.end();
i != eoi;) {
std::string::const_iterator paramFirst = i;
std::string::const_iterator paramLast = paramFirst;
for(; paramLast != eoi && *paramLast != '=' && *paramLast != ';';
++paramLast);
std::string param;
if(paramLast == eoi || *paramLast == ';') {
// No value, parmname only
param.assign(paramFirst, paramLast);
} else {
for(; paramLast != eoi && *paramLast != '"' && *paramLast != ';';
++paramLast);
if(paramLast != eoi && *paramLast == '"') {
// quoted-string
++paramLast;
for(; paramLast != eoi && *paramLast != '"'; ++paramLast);
if(paramLast != eoi) {
++paramLast;
}
param.assign(paramFirst, paramLast);
for(; paramLast != eoi && *paramLast != ';'; ++paramLast);
} else {
param.assign(paramFirst, paramLast);
}
}
param = strip(param);
*out++ = param;
if(paramLast == eoi) {
break;
}
i = paramLast;
++i;
}
}
} // namespace
std::string getContentDispositionFilename(const std::string& header)
{
static const char A2_KEYNAME[] = "filename";
std::string filename;
std::vector<std::string> params;
parseParam(std::back_inserter(params), header);
for(std::vector<std::string>::const_iterator i = params.begin(),
eoi = params.end(); i != eoi; ++i) {
const std::string& param = *i;
if(!istartsWith(param, A2_KEYNAME) ||
param.size() == sizeof(A2_KEYNAME)-1) {
continue;
}
std::string::const_iterator markeritr = param.begin()+sizeof(A2_KEYNAME)-1;
if(*markeritr == '*') {
// See RFC2231 Section4 and draft-reschke-rfc2231-in-http.
// Please note that this function doesn't do charset conversion
// except that if iso-8859-1 is specified, it is converted to
// utf-8.
++markeritr;
for(; markeritr != param.end() && *markeritr == ' '; ++markeritr);
if(markeritr == param.end() || *markeritr != '=') {
continue;
}
std::vector<Scip> extValues;
splitIter(markeritr+1, param.end(), std::back_inserter(extValues),
'\'', true, true);
if(extValues.size() != 3) {
continue;
}
bool bad = false;
for(std::string::const_iterator j = extValues[0].first,
eoj = extValues[0].second; j != eoj; ++j) {
// Since we first split parameter by ', we can safely assume
// that ' is not included in charset.
if(!inRFC2978MIMECharset(*j)) {
bad = true;
break;
}
}
if(bad) {
continue;
}
bad = false;
for(std::string::const_iterator j = extValues[2].first,
eoj = extValues[2].second; j != eoj; ++j){
if(*j == '%') {
if(j+1 != eoj && isHexDigit(*(j+1)) &&
j+2 != eoj && isHexDigit(*(j+2))) {
j += 2;
} else {
bad = true;
break;
}
} else {
if(*j == '*' || *j == '\'' || !inRFC2616HttpToken(*j)) {
bad = true;
break;
}
}
}
if(bad) {
continue;
}
std::string value =
percentDecode(extValues[2].first, extValues[2].second);
if(util::strieq(extValues[0].first, extValues[0].second, "iso-8859-1")) {
value = iso8859ToUtf8(value);
}
if(!detectDirTraversal(value) && value.find("/") == std::string::npos) {
filename = value;
}
if(!filename.empty()) {
break;
}
} else {
for(; markeritr != param.end() && *markeritr == ' '; ++markeritr);
if(markeritr == param.end() || markeritr+1 == param.end() ||
*markeritr != '=') {
continue;
}
Scip p = stripIter(markeritr+1, param.end());
if(p.first == p.second) {
continue;
}
std::string value(p.first, p.second);
std::string::iterator filenameLast;
if(value[0] == '\'' || value[0] == '"') {
char qc = *value.begin();
for(filenameLast = value.begin()+1;
filenameLast != value.end() && *filenameLast != qc;
++filenameLast);
} else {
filenameLast = value.end();
}
static const std::string TRIMMED("\r\n\t '\"");
std::pair<std::string::iterator, std::string::iterator> vi =
util::stripIter(value.begin(), filenameLast, TRIMMED);
value.assign(vi.first, vi.second);
value.erase(std::remove(value.begin(), value.end(), '\\'), value.end());
if(!detectDirTraversal(value) && value.find("/") == std::string::npos) {
filename = value;
}
// continue because there is a chance we can find filename*=...
}
}
return filename;
}
std::string randomAlpha(size_t length, const RandomizerHandle& randomizer) {
static const char randomChars[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
std::string str;
for(size_t i = 0; i < length; ++i) {
size_t index = randomizer->getRandomNumber(sizeof(randomChars)-1);
str += randomChars[index];
}
return str;
}
std::string toUpper(const std::string& src) {
std::string temp = src;
std::transform(temp.begin(), temp.end(), temp.begin(), toUpperChar);
return temp;
}
std::string toLower(const std::string& src) {
std::string temp = src;
std::transform(temp.begin(), temp.end(), temp.begin(), toLowerChar);
return temp;
}
void uppercase(std::string& s)
{
std::transform(s.begin(), s.end(), s.begin(), toUpperChar);
}
void lowercase(std::string& s)
{
std::transform(s.begin(), s.end(), s.begin(), toLowerChar);
}
char toUpperChar(char c)
{
if('a' <= c && c <= 'z') {
c += 'A'-'a';
}
return c;
}
char toLowerChar(char c)
{
if('A' <= c && c <= 'Z') {
c += 'a'-'A';
}
return c;
}
bool isNumericHost(const std::string& name)
{
struct addrinfo hints;
struct addrinfo* res;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_flags = AI_NUMERICHOST;
if(getaddrinfo(name.c_str(), 0, &hints, &res)) {
return false;
}
freeaddrinfo(res);
return true;
}
void setGlobalSignalHandler(int sig, void (*handler)(int), int flags) {
#ifdef HAVE_SIGACTION
struct sigaction sigact;
sigact.sa_handler = handler;
sigact.sa_flags = flags;
sigemptyset(&sigact.sa_mask);
sigaction(sig, &sigact, NULL);
#else
signal(sig, handler);
#endif // HAVE_SIGACTION
}
std::string getHomeDir()
{
const char* p = getenv("HOME");
if(p) {
return p;
} else {
#ifdef __MINGW32__
p = getenv("USERPROFILE");
if(p) {
return p;
} else {
p = getenv("HOMEDRIVE");
if(p) {
std::string homeDir = p;
p = getenv("HOMEPATH");
if(p) {
homeDir += p;
return homeDir;
}
}
}
#elif HAVE_PWD_H
passwd* pw = getpwuid(geteuid());
if(pw && pw->pw_dir) {
return pw->pw_dir;
}
#endif // HAVE_PWD_H
return A2STR::NIL;
}
}
int64_t getRealSize(const std::string& sizeWithUnit)
{
std::string::size_type p = sizeWithUnit.find_first_of("KM");
std::string size;
int32_t mult = 1;
if(p == std::string::npos) {
size = sizeWithUnit;
} else {
if(sizeWithUnit[p] == 'K') {
mult = 1024;
} else if(sizeWithUnit[p] == 'M') {
mult = 1024*1024;
}
size.assign(sizeWithUnit.begin(), sizeWithUnit.begin()+p);
}
int64_t v = parseLLInt(size);
if(v < 0) {
throw DL_ABORT_EX(fmt("Negative value detected: %s", sizeWithUnit.c_str()));
} else if(INT64_MAX/mult < v) {
throw DL_ABORT_EX(fmt(MSG_STRING_INTEGER_CONVERSION_FAILURE,
"overflow/underflow"));
}
return v*mult;
}
std::string abbrevSize(int64_t size)
{
if(size < 1024) {
return itos(size, true);
}
static const char units[] = { 'K', 'M' };
size_t i = 0;
int r = size&0x3ffu;
size >>= 10;
for(; i < sizeof(units)-1 && size >= 1024; ++i) {
r = size&0x3ffu;
size >>= 10;
}
std::string result = itos(size, true);
result += fmt(".%d%ci", r*10/1024, units[i]);
return result;
}
void sleep(long seconds) {
#if defined(HAVE_WINSOCK2_H)
::Sleep(seconds * 1000);
#elif HAVE_SLEEP
::sleep(seconds);
#elif defined(HAVE_USLEEP)
::usleep(seconds * 1000000);
#else
# error no sleep function is available (nanosleep?)
#endif
}
void usleep(long microseconds) {
#ifdef HAVE_USLEEP
::usleep(microseconds);
#elif defined(HAVE_WINSOCK2_H)
LARGE_INTEGER current, freq, end;
static enum {GET_FREQUENCY, GET_MICROSECONDS, SKIP_MICROSECONDS} state = GET_FREQUENCY;
if (state == GET_FREQUENCY) {
if (QueryPerformanceFrequency(&freq))
state = GET_MICROSECONDS;
else
state = SKIP_MICROSECONDS;
}
long msec = microseconds / 1000;
microseconds %= 1000;
if (state == GET_MICROSECONDS && microseconds) {
QueryPerformanceCounter(&end);
end.QuadPart += (freq.QuadPart * microseconds) / 1000000;
while (QueryPerformanceCounter(&current) && (current.QuadPart <= end.QuadPart))
/* noop */ ;
}
if (msec)
Sleep(msec);
#else
#error no usleep function is available (nanosleep?)
#endif
}
unsigned int alphaToNum(const std::string& alphabets)
{
if(alphabets.empty()) {
return 0;
}
char base;
if(islower(alphabets[0])) {
base = 'a';
} else {
base = 'A';
}
uint64_t num = 0;
for(size_t i = 0, eoi = alphabets.size(); i < eoi; ++i) {
unsigned int v = alphabets[i]-base;
num = num*26+v;
if(num > UINT32_MAX) {
return 0;
}
}
return num;
}
void mkdirs(const std::string& dirpath)
{
File dir(dirpath);
if(!dir.mkdirs()) {
int errNum = errno;
if(!dir.isDir()) {
throw DL_ABORT_EX3
(errNum,
fmt(EX_MAKE_DIR, dir.getPath().c_str(),
safeStrerror(errNum).c_str()),
error_code::DIR_CREATE_ERROR);
}
}
}
void convertBitfield(BitfieldMan* dest, const BitfieldMan* src)
{
size_t numBlock = dest->countBlock();
for(size_t index = 0; index < numBlock; ++index) {
if(src->isBitSetOffsetRange((int64_t)index*dest->getBlockLength(),
dest->getBlockLength())) {
dest->setBit(index);
}
}
}
std::string toString(const BinaryStreamHandle& binaryStream)
{
std::stringstream strm;
char data[2048];
while(1) {
int32_t dataLength = binaryStream->readData
(reinterpret_cast<unsigned char*>(data), sizeof(data), strm.tellp());
strm.write(data, dataLength);
if(dataLength == 0) {
break;
}
}
return strm.str();
}
#ifdef HAVE_POSIX_MEMALIGN
/**
* In linux 2.6, alignment and size should be a multiple of 512.
*/
void* allocateAlignedMemory(size_t alignment, size_t size)
{
void* buffer;
int res;
if((res = posix_memalign(&buffer, alignment, size)) != 0) {
throw FATAL_EXCEPTION
(fmt("Error in posix_memalign: %s",
util::safeStrerror(res).c_str()));
}
return buffer;
}
#endif // HAVE_POSIX_MEMALIGN
std::pair<std::string, uint16_t>
getNumericNameInfo(const struct sockaddr* sockaddr, socklen_t len)
{
char host[NI_MAXHOST];
char service[NI_MAXSERV];
int s = getnameinfo(sockaddr, len, host, NI_MAXHOST, service, NI_MAXSERV,
NI_NUMERICHOST|NI_NUMERICSERV);
if(s != 0) {
throw DL_ABORT_EX(fmt("Failed to get hostname and port. cause: %s",
gai_strerror(s)));
}
return std::pair<std::string, uint16_t>(host, atoi(service)); // TODO
}
std::string htmlEscape(const std::string& src)
{
std::string dest;
for(std::string::const_iterator i = src.begin(), eoi = src.end();
i != eoi; ++i) {
char ch = *i;
if(ch == '<') {
dest += "&lt;";
} else if(ch == '>') {
dest += "&gt;";
} else if(ch == '&') {
dest += "&amp;";
} else if(ch == '\'') {
dest += "&#39;";
} else if(ch == '"') {
dest += "&quot;";
} else {
dest += ch;
}
}
return dest;
}
std::pair<size_t, std::string>
parseIndexPath(const std::string& line)
{
std::pair<Scip, Scip> p;
divide(p, line.begin(), line.end(), '=');
size_t index = parseUInt(std::string(p.first.first, p.first.second));
if(p.second.first == p.second.second) {
throw DL_ABORT_EX(fmt("Path with index=%u is empty.",
static_cast<unsigned int>(index)));
}
return std::make_pair(index, std::string(p.second.first, p.second.second));
}
std::vector<std::pair<size_t, std::string> > createIndexPaths(std::istream& i)
{
std::vector<std::pair<size_t, std::string> > indexPaths;
std::string line;
while(getline(i, line)) {
indexPaths.push_back(parseIndexPath(line));
}
return indexPaths;
}
namespace {
void generateRandomDataRandom(unsigned char* data, size_t length)
{
const SharedHandle<SimpleRandomizer>& rd = SimpleRandomizer::getInstance();
for(size_t i = 0; i < length; ++i) {
data[i] = static_cast<unsigned long>(rd->getRandomNumber(256));
}
}
} // namespace
namespace {
void generateRandomDataUrandom
(unsigned char* data, size_t length, std::ifstream& devUrand)
{
devUrand.read(reinterpret_cast<char*>(data), length);
}
} // namespace
void generateRandomData(unsigned char* data, size_t length)
{
#ifdef __MINGW32__
generateRandomDataRandom(data, length);
#else // !__MINGW32__
static int method = -1;
static std::ifstream devUrand;
if(method == 0) {
generateRandomDataUrandom(data, length, devUrand);
} else if(method == 1) {
generateRandomDataRandom(data, length);
} else {
devUrand.open("/dev/urandom");
if(devUrand) {
method = 0;
} else {
method = 1;
}
generateRandomData(data, length);
}
#endif // !__MINGW32__
}
bool saveAs
(const std::string& filename, const std::string& data, bool overwrite)
{
if(!overwrite && File(filename).exists()) {
return false;
}
std::string tempFilename = filename;
tempFilename += "__temp";
{
BufferedFile fp(tempFilename, BufferedFile::WRITE);
if(!fp) {
return false;
}
if(fp.write(data.data(), data.size()) != data.size()) {
return false;
}
if(fp.close() == EOF) {
return false;
}
}
return File(tempFilename).renameTo(filename);
}
std::string applyDir(const std::string& dir, const std::string& relPath)
{
std::string s;
if(dir.empty()) {
s = "./";
s += relPath;
} else {
s = dir;
if(dir == "/") {
s += relPath;
} else {
s += "/";
s += relPath;
}
}
#ifdef __MINGW32__
for(std::string::iterator i = s.begin(), eoi = s.end(); i != eoi; ++i) {
if(*i == '\\') {
*i = '/';
}
}
#endif // __MINGW32__
return s;
}
std::string fixTaintedBasename(const std::string& src)
{
static std::string SLASH_REP = "%2F";
return escapePath(replace(src, A2STR::SLASH_C, SLASH_REP));
}
void generateRandomKey(unsigned char* key)
{
#ifdef ENABLE_MESSAGE_DIGEST
unsigned char bytes[40];
generateRandomData(bytes, sizeof(bytes));
message_digest::digest(key, 20, MessageDigest::sha1(), bytes, sizeof(bytes));
#else // !ENABLE_MESSAGE_DIGEST
generateRandomData(key, 20);
#endif // !ENABLE_MESSAGE_DIGEST
}
// Returns true is given numeric ipv4addr is in Private Address Space.
//
// From Section.3 RFC1918
// 10.0.0.0 - 10.255.255.255 (10/8 prefix)
// 172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
// 192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
bool inPrivateAddress(const std::string& ipv4addr)
{
if(util::startsWith(ipv4addr, "10.") ||
util::startsWith(ipv4addr, "192.168.")) {
return true;
}
if(util::startsWith(ipv4addr, "172.")) {
for(int i = 16; i <= 31; ++i) {
std::string t(fmt("%d.", i));
if(util::startsWith(ipv4addr.begin()+4, ipv4addr.end(),
t.begin(), t.end())) {
return true;
}
}
}
return false;
}
bool detectDirTraversal(const std::string& s)
{
if(s.empty()) {
return false;
}
for(std::string::const_iterator i = s.begin(), eoi = s.end(); i != eoi; ++i) {
unsigned char c = *i;
if(in(c, 0x00u, 0x1fu) || c == 0x7fu) {
return true;
}
}
return s == "." || s == ".." || s[0] == '/' ||
util::startsWith(s, "./") || util::startsWith(s, "../") ||
s.find("/../") != std::string::npos ||
s.find("/./") != std::string::npos ||
s[s.size()-1] == '/' ||
util::endsWith(s, "/.") || util::endsWith(s, "/..");
}
std::string escapePath(const std::string& s)
{
// We don't escape '/' because we use it as a path separator.
#ifdef __MINGW32__
static const char WIN_INVALID_PATH_CHARS[] =
{ '"', '*', ':', '<', '>', '?', '\\', '|' };
#endif // __MINGW32__
std::string d;
for(std::string::const_iterator i = s.begin(), eoi = s.end(); i != eoi; ++i) {
unsigned char c = *i;
if(in(c, 0x00u, 0x1fu) || c == 0x7fu
#ifdef __MINGW32__
|| std::find(vbegin(WIN_INVALID_PATH_CHARS),
vend(WIN_INVALID_PATH_CHARS),
c) != vend(WIN_INVALID_PATH_CHARS)
#endif // __MINGW32__
){
d += fmt("%%%02X", c);
} else {
d += *i;
}
}
return d;
}
bool inSameCidrBlock
(const std::string& ip1, const std::string& ip2, size_t bits)
{
unsigned char s1[16], s2[16];
size_t len1, len2;
if((len1 = net::getBinAddr(s1, ip1)) == 0 ||
(len2 = net::getBinAddr(s2, ip2)) == 0 ||
len1 != len2) {
return false;
}
if(bits == 0) {
return true;
}
if(bits > 8*len1) {
bits = 8*len1;
}
int last = (bits-1)/8;
for(int i = 0; i < last; ++i) {
if(s1[i] != s2[i]) {
return false;
}
}
unsigned char mask = bitfield::lastByteMask(bits);
return (s1[last] & mask) == (s2[last] & mask);
}
void removeMetalinkContentTypes(const SharedHandle<RequestGroup>& group)
{
removeMetalinkContentTypes(group.get());
}
void removeMetalinkContentTypes(RequestGroup* group)
{
for(std::vector<std::string>::const_iterator i =
DownloadHandlerConstants::getMetalinkContentTypes().begin(),
eoi = DownloadHandlerConstants::getMetalinkContentTypes().end();
i != eoi; ++i) {
group->removeAcceptType(*i);
}
}
namespace {
void executeHook
(const std::string& command,
a2_gid_t gid,
size_t numFiles,
const std::string& firstFilename)
{
const std::string gidStr = util::itos(gid);
const std::string numFilesStr = util::uitos(numFiles);
#ifndef __MINGW32__
A2_LOG_INFO(fmt("Executing user command: %s %s %s %s",
command.c_str(),
gidStr.c_str(),
numFilesStr.c_str(),
firstFilename.c_str()));
pid_t cpid = fork();
if(cpid == -1) {
A2_LOG_ERROR("fork() failed. Cannot execute user command.");
} else if(cpid == 0) {
execl(command.c_str(),
command.c_str(),
gidStr.c_str(),
numFilesStr.c_str(),
firstFilename.c_str(),
reinterpret_cast<char*>(0));
perror(("Could not execute user command: "+command).c_str());
exit(EXIT_FAILURE);
}
#else
PROCESS_INFORMATION pi;
STARTUPINFOW si;
memset(&si, 0, sizeof (si));
si.cb = sizeof(STARTUPINFO);
memset(&pi, 0, sizeof (pi));
bool batch = util::iendsWith(command, ".bat");
std::string cmdline;
std::string cmdexe;
if(batch) {
const char* p = getenv("windir");
if(p) {
cmdexe = p;
cmdexe += "\\system32\\cmd.exe";
} else {
A2_LOG_INFO("Failed to get windir environment variable."
" Executing batch file will fail.");
// TODO Might be useless.
cmdexe = "cmd.exe";
}
cmdline += "/C \"";
}
cmdline += "\"";
cmdline += command;
cmdline += "\"";
cmdline += " ";
cmdline += gidStr;
cmdline += " ";
cmdline += numFilesStr;
cmdline += " \"";
cmdline += firstFilename;
cmdline += "\"";
if(batch) {
cmdline += "\"";
}
int cmdlineLen = utf8ToWChar(0, 0, cmdline.c_str());
assert(cmdlineLen > 0);
array_ptr<wchar_t> wcharCmdline(new wchar_t[cmdlineLen]);
cmdlineLen = utf8ToWChar(wcharCmdline, cmdlineLen, cmdline.c_str());
assert(cmdlineLen > 0);
A2_LOG_INFO(fmt("Executing user command: %s", cmdline.c_str()));
DWORD rc = CreateProcessW(batch ? utf8ToWChar(cmdexe).c_str() : NULL,
wcharCmdline,
NULL,
NULL,
true,
0,
NULL,
0,
&si,
&pi);
if(!rc) {
A2_LOG_ERROR("CreateProcess() failed. Cannot execute user command.");
}
#endif
}
} // namespace
void executeHookByOptName
(const SharedHandle<RequestGroup>& group, const Option* option,
const Pref* pref)
{
executeHookByOptName(group.get(), option, pref);
}
void executeHookByOptName
(const RequestGroup* group, const Option* option, const Pref* pref)
{
const std::string& cmd = option->get(pref);
if(!cmd.empty()) {
const SharedHandle<DownloadContext> dctx = group->getDownloadContext();
std::string firstFilename;
size_t numFiles = 0;
if(!group->inMemoryDownload()) {
SharedHandle<FileEntry> file = dctx->getFirstRequestedFileEntry();
if(file) {
firstFilename = file->getPath();
}
numFiles = dctx->countRequestedFileEntry();
}
executeHook(cmd, group->getGID(), numFiles, firstFilename);
}
}
std::string createSafePath
(const std::string& dir, const std::string& filename)
{
return util::applyDir
(dir,
util::isUtf8(filename)?
util::fixTaintedBasename(filename):
util::escapePath(util::percentEncode(filename)));
}
std::string encodeNonUtf8(const std::string& s)
{
return util::isUtf8(s)?s:util::percentEncode(s);
}
std::string makeString(const char* str)
{
if(str) {
return str;
} else {
return A2STR::NIL;
}
}
std::string safeStrerror(int errNum)
{
return makeString(strerror(errNum));
}
bool noProxyDomainMatch
(const std::string& hostname,
const std::string& domain)
{
if(!domain.empty() && domain[0] == '.' && !util::isNumericHost(hostname)) {
return util::endsWith(hostname, domain);
} else {
return hostname == domain;
}
}
bool tlsHostnameMatch(const std::string& pattern, const std::string& hostname)
{
std::string::const_iterator ptWildcard = std::find(pattern.begin(),
pattern.end(),
'*');
if(ptWildcard == pattern.end()) {
return strieq(pattern.begin(), pattern.end(),
hostname.begin(), hostname.end());
}
std::string::const_iterator ptLeftLabelEnd = std::find(pattern.begin(),
pattern.end(),
'.');
bool wildcardEnabled = true;
// Do case-insensitive match. At least 2 dots are required to enable
// wildcard match. Also wildcard must be in the left-most label.
// Don't attempt to match a presented identifier where the wildcard
// character is embedded within an A-label.
if(ptLeftLabelEnd == pattern.end() ||
std::find(ptLeftLabelEnd+1, pattern.end(), '.') == pattern.end() ||
ptLeftLabelEnd < ptWildcard ||
istartsWith(pattern, "xn--")) {
wildcardEnabled = false;
}
if(!wildcardEnabled) {
return strieq(pattern.begin(), pattern.end(),
hostname.begin(), hostname.end());
}
std::string::const_iterator hnLeftLabelEnd = std::find(hostname.begin(),
hostname.end(),
'.');
if(!strieq(ptLeftLabelEnd, pattern.end(), hnLeftLabelEnd, hostname.end())) {
return false;
}
// Perform wildcard match. Here '*' must match at least one
// character.
if(hnLeftLabelEnd - hostname.begin() < ptLeftLabelEnd - pattern.begin()) {
return false;
}
return
istartsWith(hostname.begin(), hnLeftLabelEnd,
pattern.begin(), ptWildcard) &&
iendsWith(hostname.begin(), hnLeftLabelEnd,
ptWildcard+1, ptLeftLabelEnd);
}
bool startsWith(const std::string& a, const char* b)
{
return startsWith(a.begin(), a.end(), b);
}
bool startsWith(const std::string& a, const std::string& b)
{
return startsWith(a.begin(), a.end(), b.begin(), b.end());
}
bool istartsWith(const std::string& a, const char* b)
{
return istartsWith(a.begin(), a.end(), b);
}
bool endsWith(const std::string& a, const char* b)
{
return endsWith(a.begin(), a.end(), b, b+strlen(b));
}
bool endsWith(const std::string& a, const std::string& b)
{
return endsWith(a.begin(), a.end(), b.begin(), b.end());
}
bool iendsWith(const std::string& a, const char* b)
{
return iendsWith(a.begin(), a.end(), b, b+strlen(b));
}
bool iendsWith(const std::string& a, const std::string& b)
{
return iendsWith(a.begin(), a.end(), b.begin(), b.end());
}
} // namespace util
} // namespace aria2
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