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aria2/src/util.cc

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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 <limits.h>
#include <stdint.h>
#include <cerrno>
#include <cassert>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <sstream>
#include <ostream>
#include <algorithm>
#include <fstream>
#include <iomanip>
#ifndef HAVE_SLEEP
# ifdef HAVE_WINSOCK_H
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# endif // HAVE_WINSOCK_H
#endif // HAVE_SLEEP
#ifdef HAVE_LIBGCRYPT
# include <gcrypt.h>
#elif HAVE_LIBSSL
# include <openssl/rand.h>
# include "SimpleRandomizer.h"
#endif // HAVE_LIBSSL
#include "File.h"
#include "message.h"
#include "Randomizer.h"
#include "a2netcompat.h"
#include "DlAbortEx.h"
#include "BitfieldMan.h"
#include "DefaultDiskWriter.h"
#include "FatalException.h"
#include "FileEntry.h"
#include "StringFormat.h"
#include "A2STR.h"
#include "array_fun.h"
#include "a2functional.h"
#include "bitfield.h"
#include "DownloadHandlerConstants.h"
#include "RequestGroup.h"
#include "LogFactory.h"
#include "Option.h"
#ifdef ENABLE_MESSAGE_DIGEST
# include "MessageDigestHelper.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 {
namespace util {
const std::string DEFAULT_TRIM_CHARSET("\r\n\t ");
std::string trim(const std::string& src, const std::string& trimCharset)
{
std::string temp(src);
trimSelf(temp, trimCharset);
return temp;
}
void trimSelf(std::string& str, const std::string& trimCharset)
{
std::string::size_type first = str.find_first_not_of(trimCharset);
if(first == std::string::npos) {
str.clear();
} else {
std::string::size_type last = str.find_last_not_of(trimCharset)+1;
str.erase(last);
str.erase(0, first);
}
}
void split(std::pair<std::string, std::string>& hp, const std::string& src, char delim)
{
hp.first = A2STR::NIL;
hp.second = A2STR::NIL;
std::string::size_type p = src.find(delim);
if(p == std::string::npos) {
hp.first = trim(src);
hp.second = A2STR::NIL;
} else {
hp.first = trim(src.substr(0, p));
hp.second = trim(src.substr(p+1));
}
}
std::pair<std::string, std::string> split(const std::string& src, const std::string& delims)
{
std::pair<std::string, std::string> hp;
hp.first = A2STR::NIL;
hp.second = A2STR::NIL;
std::string::size_type p = src.find_first_of(delims);
if(p == std::string::npos) {
hp.first = trim(src);
hp.second = A2STR::NIL;
} else {
hp.first = trim(src.substr(0, p));
hp.second = trim(src.substr(p+1));
}
return hp;
}
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;
}
bool startsWith(const std::string& target, const std::string& part) {
if(target.size() < part.size()) {
return false;
}
if(part.empty()) {
return true;
}
if(target.find(part) == 0) {
return true;
} else {
return false;
}
}
bool endsWith(const std::string& target, const std::string& part) {
if(target.size() < part.size()) {
return false;
}
if(part.empty()) {
return true;
}
if(target.rfind(part) == target.size()-part.size()) {
return true;
} else {
return false;
}
}
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 += target.substr(p, np-p);
result += newstr;
p = np+oldstr.size();
np = target.find(oldstr, p);
}
result += target.substr(p);
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);
}
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.append(StringFormat("%%%02X", target[i]).str());
} else {
dest += 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 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(StringFormat("%%%02X", target[i]).str());
}
}
return dest;
}
std::string torrentPercentEncode(const std::string& target)
{
return torrentPercentEncode
(reinterpret_cast<const unsigned char*>(target.c_str()), target.size());
}
std::string percentDecode(const std::string& target) {
std::string result;
for(std::string::const_iterator itr = target.begin(), eoi = target.end();
itr != eoi; ++itr) {
if(*itr == '%') {
if(itr+1 != target.end() && itr+2 != target.end() &&
isHexDigit(*(itr+1)) && isHexDigit(*(itr+2))) {
result += parseInt(std::string(itr+1, itr+3), 16);
itr += 2;
} else {
result += *itr;
}
} else {
result += *itr;
}
}
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)&0x0f;
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());
}
static 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;
}
std::string fromHex(const std::string& src)
{
std::string dest;
if(src.size()%2) {
return dest;
}
for(size_t i = 0, eoi = src.size(); i < eoi; i += 2) {
unsigned char high = hexCharToUInt(src[i]);
unsigned char low = hexCharToUInt(src[i+1]);
if(high == 255 || low == 255) {
dest.clear();
return dest;
}
dest += (high*16+low);
}
return dest;
}
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) {
std::string str;
if(sec >= 3600) {
str = itos(sec/3600);
str += "h";
sec %= 3600;
}
if(sec >= 60) {
int min = sec/60;
if(min < 10) {
str += "0";
}
str += itos(min);
str += "m";
sec %= 60;
}
if(sec < 10) {
str += "0";
}
str += itos(sec);
str += "s";
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;
}
int32_t parseInt(const std::string& s, int32_t base)
{
int64_t v = parseLLInt(s, base);
if(v < INT32_MIN || INT32_MAX < v) {
throw DL_ABORT_EX(StringFormat(MSG_STRING_INTEGER_CONVERSION_FAILURE,
s.c_str()).str());
}
return v;
}
uint32_t parseUInt(const std::string& s, int base)
{
uint64_t v = parseULLInt(s, base);
if(UINT32_MAX < v) {
throw DL_ABORT_EX(StringFormat(MSG_STRING_INTEGER_CONVERSION_FAILURE,
s.c_str()).str());
}
return v;
}
bool parseUIntNoThrow(uint32_t& result, const std::string& s, int base)
{
std::string trimed = trim(s);
if(trimed.empty()) {
return false;
}
// We don't allow negative number.
if(trimed[0] == '-') {
return false;
}
char* stop;
errno = 0;
unsigned long int v = strtoul(trimed.c_str(), &stop, base);
if(*stop != '\0') {
return false;
} else if(((v == ULONG_MAX) && (errno == ERANGE)) || (v > UINT32_MAX)) {
return false;
}
result = v;
return true;
}
int64_t parseLLInt(const std::string& s, int32_t base)
{
std::string trimed = trim(s);
if(trimed.empty()) {
throw DL_ABORT_EX(StringFormat(MSG_STRING_INTEGER_CONVERSION_FAILURE,
"empty string").str());
}
char* stop;
errno = 0;
int64_t v = strtoll(trimed.c_str(), &stop, base);
if(*stop != '\0') {
throw DL_ABORT_EX(StringFormat(MSG_STRING_INTEGER_CONVERSION_FAILURE,
trimed.c_str()).str());
} else if(((v == INT64_MIN) || (v == INT64_MAX)) && (errno == ERANGE)) {
throw DL_ABORT_EX(StringFormat(MSG_STRING_INTEGER_CONVERSION_FAILURE,
trimed.c_str()).str());
}
return v;
}
uint64_t parseULLInt(const std::string& s, int base)
{
std::string trimed = trim(s);
if(trimed.empty()) {
throw DL_ABORT_EX(StringFormat(MSG_STRING_INTEGER_CONVERSION_FAILURE,
"empty string").str());
}
// We don't allow negative number.
if(trimed[0] == '-') {
throw DL_ABORT_EX(StringFormat(MSG_STRING_INTEGER_CONVERSION_FAILURE,
trimed.c_str()).str());
}
char* stop;
errno = 0;
uint64_t v = strtoull(trimed.c_str(), &stop, base);
if(*stop != '\0') {
throw DL_ABORT_EX(StringFormat(MSG_STRING_INTEGER_CONVERSION_FAILURE,
trimed.c_str()).str());
} else if((v == ULLONG_MAX) && (errno == ERANGE)) {
throw DL_ABORT_EX(StringFormat(MSG_STRING_INTEGER_CONVERSION_FAILURE,
trimed.c_str()).str());
}
return v;
}
IntSequence parseIntRange(const std::string& src)
{
IntSequence::Values values;
std::string temp = src;
while(temp.size()) {
std::pair<std::string, std::string> p = split(temp, ",");
temp = p.second;
if(p.first.empty()) {
continue;
}
if(p.first.find("-") == std::string::npos) {
int32_t v = parseInt(p.first.c_str());
values.push_back(IntSequence::Value(v, v+1));
} else {
std::pair<std::string, std::string> vp = split(p.first.c_str(), "-");
if(vp.first.empty() || vp.second.empty()) {
throw DL_ABORT_EX
(StringFormat(MSG_INCOMPLETE_RANGE, p.first.c_str()).str());
}
int32_t v1 = parseInt(vp.first.c_str());
int32_t v2 = parseInt(vp.second.c_str());
values.push_back(IntSequence::Value(v1, v2+1));
}
}
return values;
}
static void computeHeadPieces
(std::vector<size_t>& indexes,
const std::vector<SharedHandle<FileEntry> >& fileEntries,
size_t pieceLength,
uint64_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);
}
}
}
static void computeTailPieces
(std::vector<size_t>& indexes,
const std::vector<SharedHandle<FileEntry> >& fileEntries,
size_t pieceLength,
uint64_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;
}
uint64_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);
}
}
}
void parsePrioritizePieceRange
(std::vector<size_t>& result, const std::string& src,
const std::vector<SharedHandle<FileEntry> >& fileEntries,
size_t pieceLength,
uint64_t defaultSize)
{
std::vector<size_t> indexes;
std::vector<std::string> parts;
split(src, std::back_inserter(parts), ",", true);
for(std::vector<std::string>::const_iterator i = parts.begin(),
eoi = parts.end(); i != eoi; ++i) {
if((*i) == "head") {
computeHeadPieces(indexes, fileEntries, pieceLength, defaultSize);
} else if(util::startsWith(*i, "head=")) {
std::string sizestr = std::string((*i).begin()+(*i).find("=")+1,
(*i).end());
computeHeadPieces(indexes, fileEntries, pieceLength,
std::max((int64_t)0, getRealSize(sizestr)));
} else if((*i) == "tail") {
computeTailPieces(indexes, fileEntries, pieceLength, defaultSize);
} else if(util::startsWith(*i, "tail=")) {
std::string sizestr = std::string((*i).begin()+(*i).find("=")+1,
(*i).end());
computeTailPieces(indexes, fileEntries, pieceLength,
std::max((int64_t)0, getRealSize(sizestr)));
} else {
throw DL_ABORT_EX
(StringFormat("Unrecognized token %s", (*i).c_str()).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(0xa0 <= c) {
if(c <= 0xbf) {
dest += 0xc2;
} else {
dest += 0xc3;
}
dest += c&(~0x40);
} else if(0x80 <= c && c <= 0x9f) {
return A2STR::NIL;
} else {
dest += c;
}
}
return dest;
}
template<typename OutputIterator>
static 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 = std::string(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 = std::string(paramFirst, paramLast);
for(; paramLast != eoi && *paramLast != ';'; ++paramLast);
} else {
param = std::string(paramFirst, paramLast);
}
}
trimSelf(param);
*out++ = param;
if(paramLast == eoi) {
break;
}
i = paramLast;
++i;
}
}
std::string getContentDispositionFilename(const std::string& header)
{
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;
static const std::string keyName = "filename";
if(!startsWith(toLower(param), keyName) || param.size() == keyName.size()) {
continue;
}
std::string::const_iterator markeritr = param.begin()+keyName.size();
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::pair<std::string, std::string> paramPair;
split(paramPair, param, '=');
std::string value = paramPair.second;
std::vector<std::string> extValues;
split(value, std::back_inserter(extValues), "'", false, true);
if(extValues.size() != 3) {
continue;
}
bool bad = false;
const std::string& charset = extValues[0];
for(std::string::const_iterator j = charset.begin(), eoi = charset.end();
j != eoi; ++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;
value = extValues[2];
for(std::string::const_iterator j = value.begin(), eoi = value.end();
j != eoi; ++j){
if(*j == '%') {
if(j+1 != value.end() && isHexDigit(*(j+1)) &&
j+2 != value.end() && isHexDigit(*(j+2))) {
j += 2;
} else {
bad = true;
break;
}
} else {
if(*j == '*' || *j == '\'' || !inRFC2616HttpToken(*j)) {
bad = true;
break;
}
}
}
if(bad) {
continue;
}
value = percentDecode(value);
if(toLower(extValues[0]) == "iso-8859-1") {
value = iso8859ToUtf8(value);
}
if(!detectDirTraversal(value) &&
value.find(A2STR::SLASH_C) == std::string::npos) {
filename = value;
}
if(!filename.empty()) {
break;
}
} else {
for(; markeritr != param.end() && *markeritr == ' '; ++markeritr);
if(markeritr == param.end() || *markeritr != '=') {
continue;
}
std::pair<std::string, std::string> paramPair;
split(paramPair, param, '=');
std::string value = paramPair.second;
if(value.empty()) {
continue;
}
std::string::iterator filenameLast;
if(*value.begin() == '\'' || *value.begin() == '"') {
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 '\"");
value = percentDecode(std::string(value.begin(), filenameLast));
trimSelf(value, TRIMMED);
value.erase(std::remove(value.begin(), value.end(), '\\'), value.end());
if(!detectDirTraversal(value) &&
value.find(A2STR::SLASH_C) == 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 *random_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
std::string str;
for(size_t i = 0; i < length; ++i) {
size_t index = randomizer->getRandomNumber(strlen(random_chars));
str += random_chars[index];
}
return str;
}
std::string toUpper(const std::string& src) {
std::string temp = src;
std::transform(temp.begin(), temp.end(), temp.begin(), ::toupper);
return temp;
}
std::string toLower(const std::string& src) {
std::string temp = src;
std::transform(temp.begin(), temp.end(), temp.begin(), ::tolower);
return temp;
}
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 {
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 = sizeWithUnit.substr(0, p);
}
int64_t v = parseLLInt(size);
if(v < 0) {
throw DL_ABORT_EX
(StringFormat("Negative value detected: %s", sizeWithUnit.c_str()).str());
} else if(INT64_MAX/mult < v) {
throw DL_ABORT_EX(StringFormat(MSG_STRING_INTEGER_CONVERSION_FAILURE,
"overflow/underflow").str());
}
return v*mult;
}
std::string abbrevSize(int64_t size)
{
if(size < 1024) {
return itos(size, true);
}
char units[] = { 'K', 'M' };
size_t numUnit = sizeof(units)/sizeof(char);
size_t i = 0;
int r = size&0x3ff;
size >>= 10;
for(; i < numUnit-1 && size >= 1024; ++i) {
r = size&0x3ff;
size >>= 10;
}
std::string result = itos(size, true);
result += A2STR::DOT_C;
result += itos(r*10/1024);
result += units[i];
result += "i";
return result;
}
void sleep(long seconds) {
#ifdef HAVE_SLEEP
::sleep(seconds);
#elif defined(HAVE_USLEEP)
::usleep(seconds * 1000000);
#elif defined(HAVE_WINSOCK2_H)
::Sleep(seconds * 1000);
#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
}
bool isNumber(const std::string& what)
{
if(what.empty()) {
return false;
}
for(std::string::const_iterator i = what.begin(), eoi = what.end();
i != eoi; ++i) {
if(!isDigit(*i)) {
return false;
}
}
return true;
}
bool isLowercase(const std::string& what)
{
if(what.empty()) {
return false;
}
for(uint32_t i = 0, eoi = what.size(); i < eoi; ++i) {
if(!('a' <= what[i] && what[i] <= 'z')) {
return false;
}
}
return true;
}
bool isUppercase(const std::string& what)
{
if(what.empty()) {
return false;
}
for(uint32_t i = 0, eoi = what.size(); i < eoi; ++i) {
if(!('A' <= what[i] && what[i] <= 'Z')) {
return false;
}
}
return true;
}
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.isDir()) {
// do nothing
} else if(dir.exists()) {
throw DL_ABORT_EX
(StringFormat(EX_MAKE_DIR, dir.getPath().c_str(),
"File already exists.").str());
} else if(!dir.mkdirs()) {
throw DL_ABORT_EX
(StringFormat(EX_MAKE_DIR, dir.getPath().c_str(),
strerror(errno)).str());
}
}
void convertBitfield(BitfieldMan* dest, const BitfieldMan* src)
{
size_t numBlock = dest->countBlock();
for(size_t index = 0; index < numBlock; ++index) {
if(src->isBitSetOffsetRange((uint64_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
(StringFormat("Error in posix_memalign: %s", strerror(res)).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(StringFormat("Failed to get hostname and port. cause: %s",
gai_strerror(s)).str());
}
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::map<size_t, std::string>::value_type
parseIndexPath(const std::string& line)
{
std::pair<std::string, std::string> p = split(line, "=");
size_t index = parseUInt(p.first);
if(p.second.empty()) {
throw DL_ABORT_EX(StringFormat("Path with index=%u is empty.",
static_cast<unsigned int>(index)).str());
}
return std::map<size_t, std::string>::value_type(index, p.second);
}
std::map<size_t, std::string> createIndexPathMap(std::istream& i)
{
std::map<size_t, std::string> indexPathMap;
std::string line;
while(getline(i, line)) {
indexPathMap.insert(indexPathMap.begin(), parseIndexPath(line));
}
return indexPathMap;
}
void generateRandomData(unsigned char* data, size_t length)
{
#ifdef HAVE_LIBGCRYPT
gcry_randomize(data, length, GCRY_STRONG_RANDOM);
#elif HAVE_LIBSSL
if(RAND_bytes(data, length) != 1) {
for(size_t i = 0; i < length; ++i) {
data[i] = SimpleRandomizer::getInstance()->getRandomNumber(UINT8_MAX+1);
}
}
#else
std::ifstream i("/dev/urandom", std::ios::binary);
i.read(reinterpret_cast<char*>(data), length);
#endif // HAVE_LIBSSL
}
bool saveAs
(const std::string& filename, const std::string& data, bool overwrite)
{
if(!overwrite && File(filename).exists()) {
return false;
}
std::string tempFilename = strconcat(filename, "__temp");
{
std::ofstream out(tempFilename.c_str(), std::ios::binary);
if(!out) {
return false;
}
out << data;
out.flush();
if(!out) {
return false;
}
}
return File(tempFilename).renameTo(filename);
}
std::string applyDir(const std::string& dir, const std::string& relPath)
{
if(dir.empty()) {
return strconcat(A2STR::DOT_C, A2STR::SLASH_C, relPath);
} else if(dir == A2STR::SLASH_C) {
return strconcat(A2STR::SLASH_C, relPath);
} else {
return strconcat(dir, A2STR::SLASH_C, relPath);
}
}
std::string fixTaintedBasename(const std::string& src)
{
return escapePath(replace(src, A2STR::SLASH_C, A2STR::UNDERSCORE_C));
}
void generateRandomKey(unsigned char* key)
{
#ifdef ENABLE_MESSAGE_DIGEST
unsigned char bytes[40];
generateRandomData(bytes, sizeof(bytes));
MessageDigestHelper::digest
(key, 20, MessageDigestContext::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) {
if(util::startsWith(ipv4addr, "172."+util::itos(i)+".")) {
return true;
}
}
}
return false;
}
bool detectDirTraversal(const std::string& s)
{
for(std::string::const_iterator i = s.begin(), eoi = s.end(); i != eoi; ++i) {
if(0x00 <= (*i) && (*i) <= 0x1f) {
return true;
}
}
return s == A2STR::DOT_C ||
s == ".." ||
util::startsWith(s, A2STR::SLASH_C) ||
util::startsWith(s, "./") ||
util::startsWith(s, "../") ||
s.find("/../") != std::string::npos ||
s.find("/./") != std::string::npos ||
util::endsWith(s, "/") ||
util::endsWith(s, "/.") ||
util::endsWith(s, "/..");
}
namespace {
class EscapePath {
private:
char repChar_;
public:
EscapePath(const char& repChar):repChar_(repChar) {}
char operator()(const char& c) {
if(0x00 <= c && c <=0x1f) {
return repChar_;
}
#ifdef __MINGW32__
// We don't escape '/' because we use it as a path separator.
static const char WIN_INVALID_PATH_CHARS[] =
{ '"', '*', ':', '<', '>', '?', '\\', '|' };
if(std::find(vbegin(WIN_INVALID_PATH_CHARS), vend(WIN_INVALID_PATH_CHARS),
c) != vend(WIN_INVALID_PATH_CHARS)) {
return repChar_;
}
#endif // __MINGW32__
return c;
}
};
}
std::string escapePath(const std::string& s)
{
std::string d = s;
std::transform(d.begin(), d.end(), d.begin(), EscapePath('_'));
return d;
}
bool getCidrPrefix(struct in_addr& in, const std::string& ip, int bits)
{
struct in_addr t;
if(inet_aton(ip.c_str(), &t) == 0) {
return false;
}
int lastindex = bits/8;
if(lastindex < 4) {
char* p = reinterpret_cast<char*>(&t.s_addr);
const char* last = p+4;
p += lastindex;
if(bits%8 != 0) {
*p &= bitfield::lastByteMask(bits);
++p;
}
for(; p != last; ++p) {
*p &= 0;
}
}
in = t;
return true;
}
bool inSameCidrBlock(const std::string& ip1, const std::string& ip2, int bits)
{
struct in_addr in1;
struct in_addr in2;
if(!getCidrPrefix(in1, ip1, bits) || !getCidrPrefix(in2, ip2, bits)) {
return false;
}
return in1.s_addr == in2.s_addr;
}
void removeMetalinkContentTypes(const SharedHandle<RequestGroup>& group)
{
for(std::vector<std::string>::const_iterator i =
DownloadHandlerConstants::getMetalinkContentTypes().begin(),
eoi = DownloadHandlerConstants::getMetalinkContentTypes().end();
i != eoi; ++i) {
group->removeAcceptType(*i);
}
}
void executeHook(const std::string& command, const std::string& arg)
{
LogFactory::getInstance()->info("Executing user command: %s %s",
command.c_str(), arg.c_str());
#ifndef __MINGW32__
pid_t cpid = fork();
if(cpid == -1) {
LogFactory::getInstance()->error("fork() failed."
" Cannot execute user command.");
} else if(cpid == 0) {
execl(command.c_str(), command.c_str(), arg.c_str(),
reinterpret_cast<char*>(0));
perror(("Could not execute user command: "+command).c_str());
exit(EXIT_FAILURE);
}
#else
PROCESS_INFORMATION pi;
STARTUPINFO si;
memset(&si, 0, sizeof (si));
si.cb = sizeof(STARTUPINFO);
memset(&pi, 0, sizeof (pi));
std::string cmdline = command;
strappend(cmdline, " ", arg);
DWORD rc = CreateProcess(
NULL,
(LPSTR)cmdline.c_str(),
NULL,
NULL,
true,
NULL,
NULL,
0,
&si,
&pi);
if(!rc)
LogFactory::getInstance()->error("CreateProcess() failed."
" Cannot execute user command.");
#endif
}
void executeHookByOptName
(const SharedHandle<RequestGroup>& group, const Option* option,
const std::string& opt)
{
executeHookByOptName(group.get(), option, opt);
}
void executeHookByOptName
(const RequestGroup* group, const Option* option, const std::string& opt)
{
if(!option->blank(opt)) {
executeHook(option->get(opt), util::itos(group->getGID()));
}
}
} // namespace util
} // namespace aria2
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