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/* Copyright (C) 2008,2012 Kyle Shank
This file is part of apt-s3.
apt-s3 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 3 of the License, or
(at your option) any later version.
apt-s3 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 apt-s3. If not, see <http://www.gnu.org/licenses/>.
*/
// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
/* ######################################################################
HTTP Acquire Method - This is the HTTP aquire method for APT.
It uses HTTP/1.1 and many of the fancy options there-in, such as
pipelining, range, if-range and so on.
It is based on a doubly buffered select loop. A groupe of requests are
fed into a single output buffer that is constantly fed out the
socket. This provides ideal pipelining as in many cases all of the
requests will fit into a single packet. The input socket is buffered
the same way and fed into the fd for the file (may be a pipe in future).
This double buffering provides fairly substantial transfer rates,
compared to wget the http method is about 4% faster. Most importantly,
when HTTP is compared with FTP as a protocol the speed difference is
huge. In tests over the internet from two sites to llug (via ATM) this
program got 230k/s sustained http transfer rates. FTP on the other
hand topped out at 170k/s. That combined with the time to setup the
FTP connection makes HTTP a vastly superior protocol.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <apt-pkg/fileutl.h>
#include <apt-pkg/acquire-method.h>
#include <apt-pkg/error.h>
#include <apt-pkg/hashes.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <utime.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <apti18n.h>
#include <openssl/hmac.h>
#include <openssl/evp.h>
#include <openssl/bio.h>
#include <curl/curl.h>
#include <iostream>
#include <fstream>
// Internet stuff
#include <netdb.h>
#include "config.h"
#include "connect.h"
#include "rfc2553emu.h"
#include "s3.h"
#define SLEN 1024
void doEncrypt(char * kString,char * str, const char * secretKey);
/*}}}*/
using namespace std;
string HttpMethod::FailFile;
int HttpMethod::FailFd = -1;
time_t HttpMethod::FailTime = 0;
unsigned long PipelineDepth = 10;
unsigned long TimeOut = 120;
bool Debug = false;
URI Proxy;
unsigned long CircleBuf::BwReadLimit=0;
unsigned long CircleBuf::BwTickReadData=0;
struct timeval CircleBuf::BwReadTick={0,0};
const unsigned int CircleBuf::BW_HZ=10;
// CircleBuf::CircleBuf - Circular input buffer /*{{{*/
// ---------------------------------------------------------------------
/* */
CircleBuf::CircleBuf(unsigned long Size) : Size(Size), Hash(0)
{
Buf = new unsigned char[Size];
Reset();
CircleBuf::BwReadLimit = _config->FindI("Acquire::http::Dl-Limit",0)*1024;
}
/*}}}*/
// CircleBuf::Reset - Reset to the default state /*{{{*/
// ---------------------------------------------------------------------
/* */
void CircleBuf::Reset()
{
InP = 0;
OutP = 0;
StrPos = 0;
MaxGet = (unsigned int)-1;
OutQueue = string();
if (Hash != 0)
{
delete Hash;
Hash = new Hashes;
}
};
/*}}}*/
// CircleBuf::Read - Read from a FD into the circular buffer /*{{{*/
// ---------------------------------------------------------------------
/* This fills up the buffer with as much data as is in the FD, assuming it
is non-blocking.. */
bool CircleBuf::Read(int Fd)
{
unsigned long BwReadMax;
while (1)
{
// Woops, buffer is full
if (InP - OutP == Size)
return true;
// what's left to read in this tick
BwReadMax = CircleBuf::BwReadLimit/BW_HZ;
if(CircleBuf::BwReadLimit) {
struct timeval now;
gettimeofday(&now,0);
unsigned long d = (now.tv_sec-CircleBuf::BwReadTick.tv_sec)*1000000 +
now.tv_usec-CircleBuf::BwReadTick.tv_usec;
if(d > 1000000/BW_HZ) {
CircleBuf::BwReadTick = now;
CircleBuf::BwTickReadData = 0;
}
if(CircleBuf::BwTickReadData >= BwReadMax) {
usleep(1000000/BW_HZ);
return true;
}
}
// Write the buffer segment
int Res;
if(CircleBuf::BwReadLimit) {
Res = read(Fd,Buf + (InP%Size),
BwReadMax > LeftRead() ? LeftRead() : BwReadMax);
} else
Res = read(Fd,Buf + (InP%Size),LeftRead());
if(Res > 0 && BwReadLimit > 0)
CircleBuf::BwTickReadData += Res;
if (Res == 0)
return false;
if (Res < 0)
{
if (errno == EAGAIN)
return true;
return false;
}
if (InP == 0)
gettimeofday(&Start,0);
InP += Res;
}
}
/*}}}*/
// CircleBuf::Read - Put the string into the buffer /*{{{*/
// ---------------------------------------------------------------------
/* This will hold the string in and fill the buffer with it as it empties */
bool CircleBuf::Read(string Data)
{
OutQueue += Data;
FillOut();
return true;
}
/*}}}*/
// CircleBuf::FillOut - Fill the buffer from the output queue /*{{{*/
// ---------------------------------------------------------------------
/* */
void CircleBuf::FillOut()
{
if (OutQueue.empty() == true)
return;
while (1)
{
// Woops, buffer is full
if (InP - OutP == Size)
return;
// Write the buffer segment
unsigned long Sz = LeftRead();
if (OutQueue.length() - StrPos < Sz)
Sz = OutQueue.length() - StrPos;
memcpy(Buf + (InP%Size),OutQueue.c_str() + StrPos,Sz);
// Advance
StrPos += Sz;
InP += Sz;
if (OutQueue.length() == StrPos)
{
StrPos = 0;
OutQueue = "";
return;
}
}
}
/*}}}*/
// CircleBuf::Write - Write from the buffer into a FD /*{{{*/
// ---------------------------------------------------------------------
/* This empties the buffer into the FD. */
bool CircleBuf::Write(int Fd)
{
while (1)
{
FillOut();
// Woops, buffer is empty
if (OutP == InP)
return true;
if (OutP == MaxGet)
return true;
// Write the buffer segment
int Res;
Res = write(Fd,Buf + (OutP%Size),LeftWrite());
if (Res == 0)
return false;
if (Res < 0)
{
if (errno == EAGAIN)
return true;
return false;
}
if (Hash != 0)
Hash->Add(Buf + (OutP%Size),Res);
OutP += Res;
}
}
/*}}}*/
// CircleBuf::WriteTillEl - Write from the buffer to a string /*{{{*/
// ---------------------------------------------------------------------
/* This copies till the first empty line */
bool CircleBuf::WriteTillEl(string &Data,bool Single)
{
// We cheat and assume it is unneeded to have more than one buffer load
for (unsigned long I = OutP; I < InP; I++)
{
if (Buf[I%Size] != '\n')
continue;
++I;
if (Single == false)
{
if (I < InP && Buf[I%Size] == '\r')
++I;
if (I >= InP || Buf[I%Size] != '\n')
continue;
++I;
}
Data = "";
while (OutP < I)
{
unsigned long Sz = LeftWrite();
if (Sz == 0)
return false;
if (I - OutP < Sz)
Sz = I - OutP;
Data += string((char *)(Buf + (OutP%Size)),Sz);
OutP += Sz;
}
return true;
}
return false;
}
/*}}}*/
// CircleBuf::Stats - Print out stats information /*{{{*/
// ---------------------------------------------------------------------
/* */
void CircleBuf::Stats()
{
if (InP == 0)
return;
struct timeval Stop;
gettimeofday(&Stop,0);
/* float Diff = Stop.tv_sec - Start.tv_sec +
(float)(Stop.tv_usec - Start.tv_usec)/1000000;
clog << "Got " << InP << " in " << Diff << " at " << InP/Diff << endl;*/
}
/*}}}*/
// ServerState::ServerState - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
ServerState::ServerState(URI Srv,HttpMethod *Owner) : Owner(Owner),
In(64*1024), Out(4*1024),
ServerName(Srv)
{
Reset();
}
/*}}}*/
// ServerState::Open - Open a connection to the server /*{{{*/
// ---------------------------------------------------------------------
/* This opens a connection to the server. */
bool ServerState::Open()
{
// Use the already open connection if possible.
if (ServerFd != -1)
return true;
Close();
In.Reset();
Out.Reset();
Persistent = true;
// Determine the proxy setting
if (getenv("http_proxy") == 0)
{
string DefProxy = _config->Find("Acquire::http::Proxy");
string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
if (SpecificProxy.empty() == false)
{
if (SpecificProxy == "DIRECT")
Proxy = "";
else
Proxy = SpecificProxy;
}
else
Proxy = DefProxy;
}
else
Proxy = getenv("http_proxy");
// Parse no_proxy, a , separated list of domains
if (getenv("no_proxy") != 0)
{
if (CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
Proxy = "";
}
// Determine what host and port to use based on the proxy settings
int Port = 0;
string Host;
if (Proxy.empty() == true || Proxy.Host.empty() == true)
{
if (ServerName.Port != 0)
Port = ServerName.Port;
Host = ServerName.Host;
}
else
{
if (Proxy.Port != 0)
Port = Proxy.Port;
Host = Proxy.Host;
}
// Connect to the remote server
if (Connect(Host,Port,"http",80,ServerFd,TimeOut,Owner) == false)
return false;
return true;
}
/*}}}*/
// ServerState::Close - Close a connection to the server /*{{{*/
// ---------------------------------------------------------------------
/* */
bool ServerState::Close()
{
close(ServerFd);
ServerFd = -1;
return true;
}
/*}}}*/
// ServerState::RunHeaders - Get the headers before the data /*{{{*/
// ---------------------------------------------------------------------
/* Returns 0 if things are OK, 1 if an IO error occurred and 2 if a header
parse error occurred */
int ServerState::RunHeaders()
{
State = Header;
Owner->Status(_("Waiting for headers"));
Major = 0;
Minor = 0;
Result = 0;
Size = 0;
StartPos = 0;
Encoding = Closes;
HaveContent = false;
time(&Date);
do
{
string Data;
if (In.WriteTillEl(Data) == false)
continue;
if (Debug == true)
cerr << Data;
for (string::const_iterator I = Data.begin(); I < Data.end(); I++)
{
string::const_iterator J = I;
for (; J != Data.end() && *J != '\n' && *J != '\r';J++);
if (HeaderLine(string(I,J)) == false)
return 2;
I = J;
}
// 100 Continue is a Nop...
if (Result == 100)
continue;
// Tidy up the connection persistance state.
if (Encoding == Closes && HaveContent == true)
Persistent = false;
return 0;
}
while (Owner->Go(false,this) == true);
return 1;
}
/*}}}*/
// ServerState::RunData - Transfer the data from the socket /*{{{*/
// ---------------------------------------------------------------------
/* */
bool ServerState::RunData()
{
State = Data;
if (Debug == true) cerr << "Response" << endl;
// Chunked transfer encoding is fun..
if (Encoding == Chunked)
{
while (1)
{
// Grab the block size
bool Last = true;
string Data;
In.Limit(-1);
do
{
if (In.WriteTillEl(Data,true) == true)
break;
if (Debug == true) cerr << Data;
}
while ((Last = Owner->Go(false,this)) == true);
if (Debug == true) cerr << Data;
if (Last == false)
return false;
// See if we are done
unsigned long Len = strtol(Data.c_str(),0,16);
if (Len == 0)
{
In.Limit(-1);
// We have to remove the entity trailer
Last = true;
do
{
if (In.WriteTillEl(Data,true) == true && Data.length() <= 2)
break;
}
while ((Last = Owner->Go(false,this)) == true);
if (Last == false)
return false;
return !_error->PendingError();
}
// Transfer the block
In.Limit(Len);
while (Owner->Go(true,this) == true)
if (In.IsLimit() == true)
break;
// Error
if (In.IsLimit() == false)
return false;
// The server sends an extra new line before the next block specifier..
In.Limit(-1);
Last = true;
do
{
if (In.WriteTillEl(Data,true) == true)
break;
}
while ((Last = Owner->Go(false,this)) == true);
if (Last == false)
return false;
}
}
else
{
/* Closes encoding is used when the server did not specify a size, the
loss of the connection means we are done */
if (Encoding == Closes)
In.Limit(-1);
else
In.Limit(Size - StartPos);
// Just transfer the whole block.
do
{
if (In.IsLimit() == false)
continue;
In.Limit(-1);
return !_error->PendingError();
}
while (Owner->Go(true,this) == true);
}
return Owner->Flush(this) && !_error->PendingError();
}
/*}}}*/
// ServerState::HeaderLine - Process a header line /*{{{*/
// ---------------------------------------------------------------------
/* */
bool ServerState::HeaderLine(string Line)
{
if (Line.empty() == true)
return true;
// The http server might be trying to do something evil.
if (Line.length() >= MAXLEN)
return _error->Error(_("Got a single header line over %u chars"),MAXLEN);
string::size_type Pos = Line.find(' ');
if (Pos == string::npos || Pos+1 > Line.length())
{
// Blah, some servers use "connection:closes", evil.
Pos = Line.find(':');
if (Pos == string::npos || Pos + 2 > Line.length())
return _error->Error(_("Bad header line"));
Pos++;
}
// Parse off any trailing spaces between the : and the next word.
string::size_type Pos2 = Pos;
while (Pos2 < Line.length() && isspace(Line[Pos2]) != 0)
Pos2++;
string Tag = string(Line,0,Pos);
string Val = string(Line,Pos2);
if (stringcasecmp(Tag.c_str(),Tag.c_str()+4,"HTTP") == 0)
{
// Evil servers return no version
if (Line[4] == '/')
{
if (sscanf(Line.c_str(),"HTTP/%u.%u %u %[^\n]",&Major,&Minor,
&Result,Code) != 4)
return _error->Error(_("The HTTP server sent an invalid reply header"));
}
else
{
Major = 0;
Minor = 9;
if (sscanf(Line.c_str(),"HTTP %u %[^\n]",&Result,Code) != 2)
return _error->Error(_("The HTTP server sent an invalid reply header"));
}
/* Check the HTTP response header to get the default persistance
state. */
if (Major < 1)
Persistent = false;
else
{
if (Major == 1 && Minor <= 0)
Persistent = false;
else
Persistent = true;
}
return true;
}
if (stringcasecmp(Tag,"Content-Length:") == 0)
{
if (Encoding == Closes)
Encoding = Stream;
HaveContent = true;
// The length is already set from the Content-Range header
if (StartPos != 0)
return true;
if (sscanf(Val.c_str(),"%lu",&Size) != 1)
return _error->Error(_("The HTTP server sent an invalid Content-Length header"));
return true;
}
if (stringcasecmp(Tag,"Content-Type:") == 0)
{
HaveContent = true;
return true;
}
if (stringcasecmp(Tag,"Content-Range:") == 0)
{
HaveContent = true;
if (sscanf(Val.c_str(),"bytes %lu-%*u/%lu",&StartPos,&Size) != 2)
return _error->Error(_("The HTTP server sent an invalid Content-Range header"));
if ((unsigned)StartPos > Size)
return _error->Error(_("This HTTP server has broken range support"));
return true;
}
if (stringcasecmp(Tag,"Transfer-Encoding:") == 0)
{
HaveContent = true;
if (stringcasecmp(Val,"chunked") == 0)
Encoding = Chunked;
return true;
}
if (stringcasecmp(Tag,"Connection:") == 0)
{
if (stringcasecmp(Val,"close") == 0)
Persistent = false;
if (stringcasecmp(Val,"keep-alive") == 0)
Persistent = true;
return true;
}
if (stringcasecmp(Tag,"Last-Modified:") == 0)
{
if (StrToTime(Val,Date) == false)
return _error->Error(_("Unknown date format"));
return true;
}
return true;
}
/*}}}*/
// HttpMethod::SendReq - Send the HTTP request /*{{{*/
// ---------------------------------------------------------------------
/* This places the http request in the outbound buffer */
void HttpMethod::SendReq(FetchItem *Itm,CircleBuf &Out)
{
URI Uri = Itm->Uri;
// The HTTP server expects a hostname with a trailing :port
char Buf[1000];
string ProperHost = Uri.Host;
if (Uri.Port != 0)
{
sprintf(Buf,":%u",Uri.Port);
ProperHost += Buf;
}
// Just in case.
if (Itm->Uri.length() >= sizeof(Buf))
abort();
// Stupid workaround for https://forums.aws.amazon.com/thread.jspa?threadID=55746
// tl;dr s3 does not play nice with filenames that have a + sign in them
string normalized_path = QuoteString(Uri.Path, "~");
size_t f_plus = normalized_path.find("+");
size_t f_rep;
while (f_plus != string::npos){
f_rep = f_plus;
normalized_path.replace(f_rep, 1, "%2b");
f_plus = normalized_path.find("+", f_plus + 1);
}
//if (Uri.Path != normalized_path){
// cerr << "\nTransforming " << Uri.Path << " to " << normalized_path << "\n";
//}
/* Build the request. We include a keep-alive header only for non-proxy
requests. This is to tweak old http/1.0 servers that do support keep-alive
but not HTTP/1.1 automatic keep-alive. Doing this with a proxy server
will glitch HTTP/1.0 proxies because they do not filter it out and
pass it on, HTTP/1.1 says the connection should default to keep alive
and we expect the proxy to do this */
if (Proxy.empty() == true || Proxy.Host.empty())
sprintf(Buf,"GET %s HTTP/1.1\r\nHost: %s\r\nConnection: keep-alive\r\n",
normalized_path.c_str(),ProperHost.c_str());
else
{
/* Generate a cache control header if necessary. We place a max
cache age on index files, optionally set a no-cache directive
and a no-store directive for archives. */
sprintf(Buf,"GET %s HTTP/1.1\r\nHost: %s\r\n",
Itm->Uri.c_str(),ProperHost.c_str());
// only generate a cache control header if we actually want to
// use a cache
if (_config->FindB("Acquire::http::No-Cache",false) == false)
{
if (Itm->IndexFile == true)
sprintf(Buf+strlen(Buf),"Cache-Control: max-age=%u\r\n",
_config->FindI("Acquire::http::Max-Age",0));
else
{
if (_config->FindB("Acquire::http::No-Store",false) == true)
strcat(Buf,"Cache-Control: no-store\r\n");
}
}
}
// generate a no-cache header if needed
if (_config->FindB("Acquire::http::No-Cache",false) == true)
strcat(Buf,"Cache-Control: no-cache\r\nPragma: no-cache\r\n");
string Req = Buf;
// Check for a partial file
struct stat SBuf;
if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
{
// In this case we send an if-range query with a range header
sprintf(Buf,"Range: bytes=%li-\r\nIf-Range: %s\r\n",(long)SBuf.st_size - 1,
TimeRFC1123(SBuf.st_mtime).c_str());
Req += Buf;
}
else
{
if (Itm->LastModified != 0)
{
sprintf(Buf,"If-Modified-Since: %s\r\n",TimeRFC1123(Itm->LastModified).c_str());
Req += Buf;
}
}
if (Proxy.User.empty() == false || Proxy.Password.empty() == false)
Req += string("Proxy-Authorization: Basic ") +
Base64Encode(Proxy.User + ":" + Proxy.Password) + "\r\n";
/* S3 Specific */
time_t rawtime = 0;
struct tm * timeinfo = NULL;
char buffer [80] = { 0 };
char* wday = NULL;
time( &rawtime);
timeinfo = gmtime( &rawtime);
// strftime does not seem to honour set_locale(LC_ALL, "") or
// set_locale(LC_TIME, ""). So convert day of week by hand.
switch (timeinfo->tm_wday) {
case 0: wday = (char*)"Sun"; break;
case 1: wday = (char*)"Mon"; break;
case 2: wday = (char*)"Tue"; break;
case 3: wday = (char*)"Wed"; break;
case 4: wday = (char*)"Thu"; break;
case 5: wday = (char*)"Fri"; break;
case 6: wday = (char*)"Sat"; break;
}
strcat(buffer, wday);
strftime(buffer+3, 80, ", %d %b %Y %T %z", timeinfo);
string dateString((const char*)buffer);
Req += "Date: " + dateString + "\r\n";
string extractedPassword;
if (Uri.Password.empty() && NULL == getenv("AWS_SECRET_ACCESS_KEY")) {
cerr << "E: No AWS_SECRET_ACCESS_KEY set" << endl;
exit(1);
} else if(Uri.Password.empty()) {
extractedPassword = getenv("AWS_SECRET_ACCESS_KEY");
} else {
if(Uri.Password.at(0) == '['){
extractedPassword = Uri.Password.substr(1,Uri.Password.size()-2);
}else{
extractedPassword = Uri.Password;
}
}
char headertext[SLEN], signature[SLEN];
sprintf(headertext,"GET\n\n\n%s\n%s", dateString.c_str(), normalized_path.c_str());
doEncrypt(headertext, signature, extractedPassword.c_str());
string signatureString(signature);
string user;
if (Uri.User.empty() && NULL == getenv("AWS_ACCESS_KEY_ID")) {
cerr << "E: No AWS_ACCESS_KEY_ID set" << endl;
exit(1);
} else if (Uri.User.empty()) {
user = getenv("AWS_ACCESS_KEY_ID");
} else {
user = Uri.User;
}
//cerr << "user " << user << "\n";
Req += "Authorization: AWS " + user + ":" + signatureString + "\r\n";
Req += "User-Agent: Ubuntu APT-HTTP/1.3 ("VERSION")\r\n\r\n";
if (Debug == true)
cerr << "Request" << endl << Req << endl;
Out.Read(Req);
}
void doEncrypt(char *kString, char *sigString, const char* secretKey){
HMAC_CTX hctx;
BIO *bio, *b64;
char *sigptr;
long siglen = -1;
unsigned int rizlen;
char skey[SLEN];
unsigned char results[SLEN];
// Initialize SHA1 encryption
sprintf(skey, "%s", secretKey);
HMAC_CTX_init(&hctx);
HMAC_Init(&hctx, skey, (int)strlen((char *)skey), EVP_sha1());
// Encrypt
HMAC(EVP_sha1(), skey, (int)strlen((char *)skey), (unsigned char *)kString,
(int)strlen((char *)kString), results, &rizlen);
// Base 64 Encode
b64 = BIO_new(BIO_f_base64());
bio = BIO_new(BIO_s_mem());
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
bio = BIO_push(b64, bio);
BIO_write(bio, results, rizlen);
BIO_flush(bio);
siglen = BIO_get_mem_data(bio, &sigptr);
memcpy(sigString, sigptr, siglen);
sigString[siglen] = '\0';
// Clean up Encryption, Encoding
BIO_free_all(bio);
HMAC_CTX_cleanup(&hctx);
}
/*}}}*/
// HttpMethod::Go - Run a single loop /*{{{*/
// ---------------------------------------------------------------------
/* This runs the select loop over the server FDs, Output file FDs and
stdin. */
bool HttpMethod::Go(bool ToFile,ServerState *Srv)
{
// Server has closed the connection
if (Srv->ServerFd == -1 && (Srv->In.WriteSpace() == false ||
ToFile == false))
return false;
fd_set rfds,wfds;
FD_ZERO(&rfds);
FD_ZERO(&wfds);
/* Add the server. We only send more requests if the connection will
be persisting */
if (Srv->Out.WriteSpace() == true && Srv->ServerFd != -1
&& Srv->Persistent == true)
FD_SET(Srv->ServerFd,&wfds);
if (Srv->In.ReadSpace() == true && Srv->ServerFd != -1)
FD_SET(Srv->ServerFd,&rfds);
// Add the file
int FileFD = -1;
if (File != 0)
FileFD = File->Fd();
if (Srv->In.WriteSpace() == true && ToFile == true && FileFD != -1)
FD_SET(FileFD,&wfds);
// Add stdin
FD_SET(STDIN_FILENO,&rfds);
// Figure out the max fd
int MaxFd = FileFD;
if (MaxFd < Srv->ServerFd)
MaxFd = Srv->ServerFd;
// Select
struct timeval tv;
tv.tv_sec = TimeOut;
tv.tv_usec = 0;
int Res = 0;
if ((Res = select(MaxFd+1,&rfds,&wfds,0,&tv)) < 0)
{
if (errno == EINTR)
return true;
return _error->Errno("select",_("Select failed"));
}
if (Res == 0)
{
_error->Error(_("Connection timed out"));
return ServerDie(Srv);
}
// Handle server IO
if (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&rfds))
{
errno = 0;
if (Srv->In.Read(Srv->ServerFd) == false)
return ServerDie(Srv);
}
if (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&wfds))
{
errno = 0;
if (Srv->Out.Write(Srv->ServerFd) == false)
return ServerDie(Srv);
}
// Send data to the file
if (FileFD != -1 && FD_ISSET(FileFD,&wfds))
{
if (Srv->In.Write(FileFD) == false)
return _error->Errno("write",_("Error writing to output file"));
}
// Handle commands from APT
if (FD_ISSET(STDIN_FILENO,&rfds))
{
if (Run(true) != -1)
exit(100);
}
return true;
}
/*}}}*/
// HttpMethod::Flush - Dump the buffer into the file /*{{{*/
// ---------------------------------------------------------------------
/* This takes the current input buffer from the Server FD and writes it
into the file */
bool HttpMethod::Flush(ServerState *Srv)
{
if (File != 0)
{
// on GNU/kFreeBSD, apt dies on /dev/null because non-blocking
// can't be set
if (File->Name() != "/dev/null")
SetNonBlock(File->Fd(),false);
if (Srv->In.WriteSpace() == false)
return true;
while (Srv->In.WriteSpace() == true)
{
if (Srv->In.Write(File->Fd()) == false)
return _error->Errno("write",_("Error writing to file"));
if (Srv->In.IsLimit() == true)
return true;
}
if (Srv->In.IsLimit() == true || Srv->Encoding == ServerState::Closes)
return true;
}
return false;
}
/*}}}*/
// HttpMethod::ServerDie - The server has closed the connection. /*{{{*/
// ---------------------------------------------------------------------
/* */
bool HttpMethod::ServerDie(ServerState *Srv)
{
unsigned int LErrno = errno;
// Dump the buffer to the file
if (Srv->State == ServerState::Data)
{
// on GNU/kFreeBSD, apt dies on /dev/null because non-blocking
// can't be set
if (File->Name() != "/dev/null")
SetNonBlock(File->Fd(),false);
while (Srv->In.WriteSpace() == true)
{
if (Srv->In.Write(File->Fd()) == false)
return _error->Errno("write",_("Error writing to the file"));
// Done
if (Srv->In.IsLimit() == true)
return true;
}
}