-// -*- 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 <config.h>
-
-#include <apt-pkg/fileutl.h>
-#include <apt-pkg/acquire-method.h>
-#include <apt-pkg/configuration.h>
-#include <apt-pkg/error.h>
-#include <apt-pkg/hashes.h>
-#include <apt-pkg/netrc.h>
-
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <utime.h>
-#include <unistd.h>
-#include <signal.h>
-#include <stdio.h>
-#include <errno.h>
-#include <string.h>
-#include <climits>
-#include <iostream>
-#include <map>
-
-// Internet stuff
-#include <netdb.h>
-
-#include "config.h"
-#include "connect.h"
-#include "rfc2553emu.h"
-#include "http.h"
-
-#include <apti18n.h>
- /*}}}*/
-using namespace std;
-
-string HttpMethod::FailFile;
-int HttpMethod::FailFd = -1;
-time_t HttpMethod::FailTime = 0;
-unsigned long PipelineDepth = 0;
-unsigned long TimeOut = 120;
-bool AllowRedirect = false;
-bool Debug = false;
-URI Proxy;
-
-unsigned long long CircleBuf::BwReadLimit=0;
-unsigned long 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 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 long long)-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 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 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
- ssize_t 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 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
- ssize_t 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 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 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;*/
-}
- /*}}}*/
-CircleBuf::~CircleBuf()
-{
- delete [] Buf;
- delete Hash;
-}
-
-// 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
- string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
- if (!SpecificProxy.empty())
- {
- if (SpecificProxy == "DIRECT")
- Proxy = "";
- else
- Proxy = SpecificProxy;
- }
- else
- {
- string DefProxy = _config->Find("Acquire::http::Proxy");
- if (!DefProxy.empty())
- {
- Proxy = DefProxy;
- }
- else
- {
- char* result = getenv("http_proxy");
- Proxy = result ? result : "";
- }
- }
-
- // 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 */
-ServerState::RunHeadersResult 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)
- clog << 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 RUN_HEADERS_PARSE_ERROR;
- 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 RUN_HEADERS_OK;
- }
- while (Owner->Go(false,this) == true);
-
- return RUN_HEADERS_IO_ERROR;
-}
- /*}}}*/
-// ServerState::RunData - Transfer the data from the socket /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-bool ServerState::RunData()
-{
- State = Data;
-
- // 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;
- }
- while ((Last = Owner->Go(false,this)) == true);
-
- if (Last == false)
- return false;
-
- // See if we are done
- unsigned long long Len = strtoull(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;
-
- 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] == '/')
- {
- int const elements = sscanf(Line.c_str(),"HTTP/%3u.%3u %3u%359[^\n]",&Major,&Minor,&Result,Code);
- if (elements == 3)
- {
- Code[0] = '\0';
- if (Debug == true)
- clog << "HTTP server doesn't give Reason-Phrase for " << Result << std::endl;
- }
- else if (elements != 4)
- return _error->Error(_("The HTTP server sent an invalid reply header"));
- }
- else
- {
- Major = 0;
- Minor = 9;
- if (sscanf(Line.c_str(),"HTTP %3u%359[^\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;
-
- Size = strtoull(Val.c_str(), NULL, 10);
- if (Size >= std::numeric_limits<unsigned long long>::max())
- return _error->Errno("HeaderLine", _("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 %llu-%*u/%llu",&StartPos,&Size) != 2)
- return _error->Error(_("The HTTP server sent an invalid Content-Range header"));
- if ((unsigned long long)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 (RFC1123StrToTime(Val.c_str(), Date) == false)
- return _error->Error(_("Unknown date format"));
- return true;
- }
-
- if (stringcasecmp(Tag,"Location:") == 0)
- {
- Location = Val;
- 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();
-
- /* 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())
- {
- // see LP bugs #1003633 and #1086997. The "+" is encoded as a workaround
- // for a amazon S3 bug
- sprintf(Buf,"GET %s HTTP/1.1\r\nHost: %s\r\nConnection: keep-alive\r\n",
- QuoteString(Uri.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());
- }
- // generate a cache control header (if needed)
- if (_config->FindB("Acquire::http::No-Cache",false) == true)
- {
- strcat(Buf,"Cache-Control: no-cache\r\nPragma: no-cache\r\n");
- }
- else
- {
- 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");
- }
- }
-
- // If we ask for uncompressed files servers might respond with content-
- // negotation which lets us end up with compressed files we do not support,
- // see 657029, 657560 and co, so if we have no extension on the request
- // ask for text only. As a sidenote: If there is nothing to negotate servers
- // seem to be nice and ignore it.
- if (_config->FindB("Acquire::http::SendAccept", true) == true)
- {
- size_t const filepos = Itm->Uri.find_last_of('/');
- string const file = Itm->Uri.substr(filepos + 1);
- if (flExtension(file) == file)
- strcat(Buf,"Accept: text/*\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=%lli-\r\nIf-Range: %s\r\n",(long 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";
-
- maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
- if (Uri.User.empty() == false || Uri.Password.empty() == false)
- {
- Req += string("Authorization: Basic ") +
- Base64Encode(Uri.User + ":" + Uri.Password) + "\r\n";
- }
- Req += "User-Agent: " + _config->Find("Acquire::http::User-Agent",
- "Debian APT-HTTP/1.3 (" PACKAGE_VERSION ")") + "\r\n\r\n";
-
- if (Debug == true)
- cerr << Req << endl;
-
- Out.Read(Req);
-}
- /*}}}*/
-// 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
- if (_config->FindB("Acquire::http::DependOnSTDIN", true) == true)
- 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;
- }
- }
-
- // See if this is because the server finished the data stream
- if (Srv->In.IsLimit() == false && Srv->State != ServerState::Header &&
- Srv->Encoding != ServerState::Closes)
- {
- Srv->Close();
- if (LErrno == 0)
- return _error->Error(_("Error reading from server. Remote end closed connection"));
- errno = LErrno;
- return _error->Errno("read",_("Error reading from server"));
- }
- else
- {
- Srv->In.Limit(-1);
-
- // Nothing left in the buffer
- if (Srv->In.WriteSpace() == false)
- return false;
-
- // We may have got multiple responses back in one packet..
- Srv->Close();
- return true;
- }
-
- return false;
-}
- /*}}}*/
-// HttpMethod::DealWithHeaders - Handle the retrieved header data /*{{{*/
-// ---------------------------------------------------------------------
-/* We look at the header data we got back from the server and decide what
- to do. Returns DealWithHeadersResult (see http.h for details).
- */
-HttpMethod::DealWithHeadersResult
-HttpMethod::DealWithHeaders(FetchResult &Res,ServerState *Srv)
-{
- // Not Modified
- if (Srv->Result == 304)
- {
- unlink(Queue->DestFile.c_str());
- Res.IMSHit = true;
- Res.LastModified = Queue->LastModified;
- return IMS_HIT;
- }
-
- /* Redirect
- *
- * Note that it is only OK for us to treat all redirection the same
- * because we *always* use GET, not other HTTP methods. There are
- * three redirection codes for which it is not appropriate that we
- * redirect. Pass on those codes so the error handling kicks in.
- */
- if (AllowRedirect
- && (Srv->Result > 300 && Srv->Result < 400)
- && (Srv->Result != 300 // Multiple Choices
- && Srv->Result != 304 // Not Modified
- && Srv->Result != 306)) // (Not part of HTTP/1.1, reserved)
- {
- if (Srv->Location.empty() == true);
- else if (Srv->Location[0] == '/' && Queue->Uri.empty() == false)
- {
- URI Uri = Queue->Uri;
- if (Uri.Host.empty() == false)
- {
- if (Uri.Port != 0)
- strprintf(NextURI, "http://%s:%u", Uri.Host.c_str(), Uri.Port);
- else
- NextURI = "http://" + Uri.Host;
- }
- else
- NextURI.clear();
- NextURI.append(DeQuoteString(Srv->Location));
- return TRY_AGAIN_OR_REDIRECT;
- }
- else
- {
- NextURI = DeQuoteString(Srv->Location);
- URI tmpURI = NextURI;
- // Do not allow a redirection to switch protocol
- if (tmpURI.Access == "http")
- return TRY_AGAIN_OR_REDIRECT;
- }
- /* else pass through for error message */
- }
-
- /* We have a reply we dont handle. This should indicate a perm server
- failure */
- if (Srv->Result < 200 || Srv->Result >= 300)
- {
- char err[255];
- snprintf(err,sizeof(err)-1,"HttpError%i",Srv->Result);
- SetFailReason(err);
- _error->Error("%u %s",Srv->Result,Srv->Code);
- if (Srv->HaveContent == true)
- return ERROR_WITH_CONTENT_PAGE;
- return ERROR_UNRECOVERABLE;
- }
-
- // This is some sort of 2xx 'data follows' reply
- Res.LastModified = Srv->Date;
- Res.Size = Srv->Size;
-
- // Open the file
- delete File;
- File = new FileFd(Queue->DestFile,FileFd::WriteAny);
- if (_error->PendingError() == true)
- return ERROR_NOT_FROM_SERVER;
-
- FailFile = Queue->DestFile;
- FailFile.c_str(); // Make sure we dont do a malloc in the signal handler
- FailFd = File->Fd();
- FailTime = Srv->Date;
-
- delete Srv->In.Hash;
- Srv->In.Hash = new Hashes;
-
- // Set the expected size and read file for the hashes
- if (Srv->StartPos >= 0)
- {
- Res.ResumePoint = Srv->StartPos;
- File->Truncate(Srv->StartPos);
-
- if (Srv->In.Hash->AddFD(*File,Srv->StartPos) == false)
- {
- _error->Errno("read",_("Problem hashing file"));
- return ERROR_NOT_FROM_SERVER;
- }
- }
-
- SetNonBlock(File->Fd(),true);
- return FILE_IS_OPEN;
-}
- /*}}}*/
-// HttpMethod::SigTerm - Handle a fatal signal /*{{{*/
-// ---------------------------------------------------------------------
-/* This closes and timestamps the open file. This is neccessary to get
- resume behavoir on user abort */
-void HttpMethod::SigTerm(int)
-{
- if (FailFd == -1)
- _exit(100);
- close(FailFd);
-
- // Timestamp
- struct utimbuf UBuf;
- UBuf.actime = FailTime;
- UBuf.modtime = FailTime;
- utime(FailFile.c_str(),&UBuf);
-
- _exit(100);
-}
- /*}}}*/
-// HttpMethod::Fetch - Fetch an item /*{{{*/
-// ---------------------------------------------------------------------
-/* This adds an item to the pipeline. We keep the pipeline at a fixed
- depth. */
-bool HttpMethod::Fetch(FetchItem *)
-{
- if (Server == 0)
- return true;
-
- // Queue the requests
- int Depth = -1;
- for (FetchItem *I = Queue; I != 0 && Depth < (signed)PipelineDepth;
- I = I->Next, Depth++)
- {
- // If pipelining is disabled, we only queue 1 request
- if (Server->Pipeline == false && Depth >= 0)
- break;
-
- // Make sure we stick with the same server
- if (Server->Comp(I->Uri) == false)
- break;
- if (QueueBack == I)
- {
- QueueBack = I->Next;
- SendReq(I,Server->Out);
- continue;
- }
- }
-
- return true;
-};
- /*}}}*/
-// HttpMethod::Configuration - Handle a configuration message /*{{{*/
-// ---------------------------------------------------------------------
-/* We stash the desired pipeline depth */
-bool HttpMethod::Configuration(string Message)
-{
- if (pkgAcqMethod::Configuration(Message) == false)
- return false;
-
- AllowRedirect = _config->FindB("Acquire::http::AllowRedirect",true);
- TimeOut = _config->FindI("Acquire::http::Timeout",TimeOut);
- PipelineDepth = _config->FindI("Acquire::http::Pipeline-Depth",
- PipelineDepth);
- Debug = _config->FindB("Debug::Acquire::http",false);
- AutoDetectProxyCmd = _config->Find("Acquire::http::ProxyAutoDetect");
-
- // Get the proxy to use
- AutoDetectProxy();
-
- return true;
-}
- /*}}}*/
-// HttpMethod::Loop - Main loop /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-int HttpMethod::Loop()
-{
- typedef vector<string> StringVector;
- typedef vector<string>::iterator StringVectorIterator;
- map<string, StringVector> Redirected;
-
- signal(SIGTERM,SigTerm);
- signal(SIGINT,SigTerm);
-
- Server = 0;
-
- int FailCounter = 0;
- while (1)
- {
- // We have no commands, wait for some to arrive
- if (Queue == 0)
- {
- if (WaitFd(STDIN_FILENO) == false)
- return 0;
- }
-
- /* Run messages, we can accept 0 (no message) if we didn't
- do a WaitFd above.. Otherwise the FD is closed. */
- int Result = Run(true);
- if (Result != -1 && (Result != 0 || Queue == 0))
- {
- if(FailReason.empty() == false ||
- _config->FindB("Acquire::http::DependOnSTDIN", true) == true)
- return 100;
- else
- return 0;
- }
-
- if (Queue == 0)
- continue;
-
- // Connect to the server
- if (Server == 0 || Server->Comp(Queue->Uri) == false)
- {
- delete Server;
- Server = new ServerState(Queue->Uri,this);
- }
- /* If the server has explicitly said this is the last connection
- then we pre-emptively shut down the pipeline and tear down
- the connection. This will speed up HTTP/1.0 servers a tad
- since we don't have to wait for the close sequence to
- complete */
- if (Server->Persistent == false)
- Server->Close();
-
- // Reset the pipeline
- if (Server->ServerFd == -1)
- QueueBack = Queue;
-
- // Connnect to the host
- if (Server->Open() == false)
- {
- Fail(true);
- delete Server;
- Server = 0;
- continue;
- }
-
- // Fill the pipeline.
- Fetch(0);
-
- // Fetch the next URL header data from the server.
- switch (Server->RunHeaders())
- {
- case ServerState::RUN_HEADERS_OK:
- break;
-
- // The header data is bad
- case ServerState::RUN_HEADERS_PARSE_ERROR:
- {
- _error->Error(_("Bad header data"));
- Fail(true);
- RotateDNS();
- continue;
- }
-
- // The server closed a connection during the header get..
- default:
- case ServerState::RUN_HEADERS_IO_ERROR:
- {
- FailCounter++;
- _error->Discard();
- Server->Close();
- Server->Pipeline = false;
-
- if (FailCounter >= 2)
- {
- Fail(_("Connection failed"),true);
- FailCounter = 0;
- }
-
- RotateDNS();
- continue;
- }
- };
-
- // Decide what to do.
- FetchResult Res;
- Res.Filename = Queue->DestFile;
- switch (DealWithHeaders(Res,Server))
- {
- // Ok, the file is Open
- case FILE_IS_OPEN:
- {
- URIStart(Res);
-
- // Run the data
- bool Result = Server->RunData();
-
- /* If the server is sending back sizeless responses then fill in
- the size now */
- if (Res.Size == 0)
- Res.Size = File->Size();
-
- // Close the file, destroy the FD object and timestamp it
- FailFd = -1;
- delete File;
- File = 0;
-
- // Timestamp
- struct utimbuf UBuf;
- time(&UBuf.actime);
- UBuf.actime = Server->Date;
- UBuf.modtime = Server->Date;
- utime(Queue->DestFile.c_str(),&UBuf);
-
- // Send status to APT
- if (Result == true)
- {
- Res.TakeHashes(*Server->In.Hash);
- URIDone(Res);
- }
- else
- {
- if (Server->ServerFd == -1)
- {
- FailCounter++;
- _error->Discard();
- Server->Close();
-
- if (FailCounter >= 2)
- {
- Fail(_("Connection failed"),true);
- FailCounter = 0;
- }
-
- QueueBack = Queue;
- }
- else
- Fail(true);
- }
- break;
- }
-
- // IMS hit
- case IMS_HIT:
- {
- URIDone(Res);
- break;
- }
-
- // Hard server error, not found or something
- case ERROR_UNRECOVERABLE:
- {
- Fail();
- break;
- }
-
- // Hard internal error, kill the connection and fail
- case ERROR_NOT_FROM_SERVER:
- {
- delete File;
- File = 0;
-
- Fail();
- RotateDNS();
- Server->Close();
- break;
- }
-
- // We need to flush the data, the header is like a 404 w/ error text
- case ERROR_WITH_CONTENT_PAGE:
- {
- Fail();
-
- // Send to content to dev/null
- File = new FileFd("/dev/null",FileFd::WriteExists);
- Server->RunData();
- delete File;
- File = 0;
- break;
- }
-
- // Try again with a new URL
- case TRY_AGAIN_OR_REDIRECT:
- {
- // Clear rest of response if there is content
- if (Server->HaveContent)
- {
- File = new FileFd("/dev/null",FileFd::WriteExists);
- Server->RunData();
- delete File;
- File = 0;
- }
-
- /* Detect redirect loops. No more redirects are allowed
- after the same URI is seen twice in a queue item. */
- StringVector &R = Redirected[Queue->DestFile];
- bool StopRedirects = false;
- if (R.empty() == true)
- R.push_back(Queue->Uri);
- else if (R[0] == "STOP" || R.size() > 10)
- StopRedirects = true;
- else
- {
- for (StringVectorIterator I = R.begin(); I != R.end(); ++I)
- if (Queue->Uri == *I)
- {
- R[0] = "STOP";
- break;
- }
-
- R.push_back(Queue->Uri);
- }
-
- if (StopRedirects == false)
- Redirect(NextURI);
- else
- Fail();
-
- break;
- }
-
- default:
- Fail(_("Internal error"));
- break;
- }
-
- FailCounter = 0;
- }
-
- return 0;
-}
- /*}}}*/
-// HttpMethod::AutoDetectProxy - auto detect proxy /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-bool HttpMethod::AutoDetectProxy()
-{
- if (AutoDetectProxyCmd.empty())
- return true;
-
- if (Debug)
- clog << "Using auto proxy detect command: " << AutoDetectProxyCmd << endl;
-
- int Pipes[2] = {-1,-1};
- if (pipe(Pipes) != 0)
- return _error->Errno("pipe", "Failed to create Pipe");
-
- pid_t Process = ExecFork();
- if (Process == 0)
- {
- close(Pipes[0]);
- dup2(Pipes[1],STDOUT_FILENO);
- SetCloseExec(STDOUT_FILENO,false);
-
- const char *Args[2];
- Args[0] = AutoDetectProxyCmd.c_str();
- Args[1] = 0;
- execv(Args[0],(char **)Args);
- cerr << "Failed to exec method " << Args[0] << endl;
- _exit(100);
- }
- char buf[512];
- int InFd = Pipes[0];
- close(Pipes[1]);
- int res = read(InFd, buf, sizeof(buf));
- ExecWait(Process, "ProxyAutoDetect", true);
-
- if (res < 0)
- return _error->Errno("read", "Failed to read");
- if (res == 0)
- return _error->Warning("ProxyAutoDetect returned no data");
-
- // add trailing \0
- buf[res] = 0;
-
- if (Debug)
- clog << "auto detect command returned: '" << buf << "'" << endl;
-
- if (strstr(buf, "http://") == buf)
- _config->Set("Acquire::http::proxy", _strstrip(buf));
-
- return true;
-}
- /*}}}*/
-
-
+// -*- 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 acquire 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 <config.h>
+
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/acquire-method.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/hashes.h>
+#include <apt-pkg/netrc.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/proxy.h>
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <sys/select.h>
+#include <cstring>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <iostream>
+#include <sstream>
+
+#include "config.h"
+#include "connect.h"
+#include "http.h"
+
+#include <apti18n.h>
+ /*}}}*/
+using namespace std;
+
+unsigned long long CircleBuf::BwReadLimit=0;
+unsigned long 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 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 long long)-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)
+{
+ while (1)
+ {
+ // Woops, buffer is full
+ if (InP - OutP == Size)
+ return true;
+
+ // what's left to read in this tick
+ unsigned long long const BwReadMax = CircleBuf::BwReadLimit/BW_HZ;
+
+ if(CircleBuf::BwReadLimit) {
+ struct timeval now;
+ gettimeofday(&now,0);
+
+ unsigned long 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
+ ssize_t 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 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
+ ssize_t 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 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 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;*/
+}
+ /*}}}*/
+CircleBuf::~CircleBuf()
+{
+ delete [] Buf;
+ delete Hash;
+}
+
+// HttpServerState::HttpServerState - Constructor /*{{{*/
+HttpServerState::HttpServerState(URI Srv,HttpMethod *Owner) : ServerState(Srv, Owner), In(64*1024), Out(4*1024)
+{
+ TimeOut = _config->FindI("Acquire::http::Timeout",TimeOut);
+ Reset();
+}
+ /*}}}*/
+// HttpServerState::Open - Open a connection to the server /*{{{*/
+// ---------------------------------------------------------------------
+/* This opens a connection to the server. */
+bool HttpServerState::Open()
+{
+ // Use the already open connection if possible.
+ if (ServerFd != -1)
+ return true;
+
+ Close();
+ In.Reset();
+ Out.Reset();
+ Persistent = true;
+
+ // Determine the proxy setting
+ AutoDetectProxy(ServerName);
+ string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
+ if (!SpecificProxy.empty())
+ {
+ if (SpecificProxy == "DIRECT")
+ Proxy = "";
+ else
+ Proxy = SpecificProxy;
+ }
+ else
+ {
+ string DefProxy = _config->Find("Acquire::http::Proxy");
+ if (!DefProxy.empty())
+ {
+ Proxy = DefProxy;
+ }
+ else
+ {
+ char* result = getenv("http_proxy");
+ Proxy = result ? result : "";
+ }
+ }
+
+ // 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;
+}
+ /*}}}*/
+// HttpServerState::Close - Close a connection to the server /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool HttpServerState::Close()
+{
+ close(ServerFd);
+ ServerFd = -1;
+ return true;
+}
+ /*}}}*/
+// HttpServerState::RunData - Transfer the data from the socket /*{{{*/
+bool HttpServerState::RunData(FileFd * const File)
+{
+ State = Data;
+
+ // 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;
+ }
+ while ((Last = Go(false, File)) == true);
+
+ if (Last == false)
+ return false;
+
+ // See if we are done
+ unsigned long long Len = strtoull(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 = Go(false, File)) == true);
+ if (Last == false)
+ return false;
+ return !_error->PendingError();
+ }
+
+ // Transfer the block
+ In.Limit(Len);
+ while (Go(true, File) == 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 = Go(false, File)) == 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 if (JunkSize != 0)
+ In.Limit(JunkSize);
+ else
+ In.Limit(Size - StartPos);
+
+ // Just transfer the whole block.
+ do
+ {
+ if (In.IsLimit() == false)
+ continue;
+
+ In.Limit(-1);
+ return !_error->PendingError();
+ }
+ while (Go(true, File) == true);
+ }
+
+ return Owner->Flush() && !_error->PendingError();
+}
+ /*}}}*/
+bool HttpServerState::ReadHeaderLines(std::string &Data) /*{{{*/
+{
+ return In.WriteTillEl(Data);
+}
+ /*}}}*/
+bool HttpServerState::LoadNextResponse(bool const ToFile, FileFd * const File)/*{{{*/
+{
+ return Go(ToFile, File);
+}
+ /*}}}*/
+bool HttpServerState::WriteResponse(const std::string &Data) /*{{{*/
+{
+ return Out.Read(Data);
+}
+ /*}}}*/
+APT_PURE bool HttpServerState::IsOpen() /*{{{*/
+{
+ return (ServerFd != -1);
+}
+ /*}}}*/
+bool HttpServerState::InitHashes(FileFd &File) /*{{{*/
+{
+ delete In.Hash;
+ In.Hash = new Hashes;
+
+ // Set the expected size and read file for the hashes
+ File.Truncate(StartPos);
+ return In.Hash->AddFD(File, StartPos);
+}
+ /*}}}*/
+APT_PURE Hashes * HttpServerState::GetHashes() /*{{{*/
+{
+ return In.Hash;
+}
+ /*}}}*/
+// HttpServerState::Die - The server has closed the connection. /*{{{*/
+bool HttpServerState::Die(FileFd &File)
+{
+ unsigned int LErrno = errno;
+
+ // Dump the buffer to the file
+ if (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 (In.WriteSpace() == true)
+ {
+ if (In.Write(File.Fd()) == false)
+ return _error->Errno("write",_("Error writing to the file"));
+
+ // Done
+ if (In.IsLimit() == true)
+ return true;
+ }
+ }
+
+ // See if this is because the server finished the data stream
+ if (In.IsLimit() == false && State != HttpServerState::Header &&
+ Encoding != HttpServerState::Closes)
+ {
+ Close();
+ if (LErrno == 0)
+ return _error->Error(_("Error reading from server. Remote end closed connection"));
+ errno = LErrno;
+ return _error->Errno("read",_("Error reading from server"));
+ }
+ else
+ {
+ In.Limit(-1);
+
+ // Nothing left in the buffer
+ if (In.WriteSpace() == false)
+ return false;
+
+ // We may have got multiple responses back in one packet..
+ Close();
+ return true;
+ }
+
+ return false;
+}
+ /*}}}*/
+// HttpServerState::Flush - Dump the buffer into the file /*{{{*/
+// ---------------------------------------------------------------------
+/* This takes the current input buffer from the Server FD and writes it
+ into the file */
+bool HttpServerState::Flush(FileFd * const File)
+{
+ if (File != NULL)
+ {
+ // 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 (In.WriteSpace() == false)
+ return true;
+
+ while (In.WriteSpace() == true)
+ {
+ if (In.Write(File->Fd()) == false)
+ return _error->Errno("write",_("Error writing to file"));
+ if (In.IsLimit() == true)
+ return true;
+ }
+
+ if (In.IsLimit() == true || Encoding == ServerState::Closes)
+ return true;
+ }
+ return false;
+}
+ /*}}}*/
+// HttpServerState::Go - Run a single loop /*{{{*/
+// ---------------------------------------------------------------------
+/* This runs the select loop over the server FDs, Output file FDs and
+ stdin. */
+bool HttpServerState::Go(bool ToFile, FileFd * const File)
+{
+ // Server has closed the connection
+ if (ServerFd == -1 && (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 (Out.WriteSpace() == true && ServerFd != -1
+ && Persistent == true)
+ FD_SET(ServerFd,&wfds);
+ if (In.ReadSpace() == true && ServerFd != -1)
+ FD_SET(ServerFd,&rfds);
+
+ // Add the file
+ int FileFD = -1;
+ if (File != NULL)
+ FileFD = File->Fd();
+
+ if (In.WriteSpace() == true && ToFile == true && FileFD != -1)
+ FD_SET(FileFD,&wfds);
+
+ // Add stdin
+ if (_config->FindB("Acquire::http::DependOnSTDIN", true) == true)
+ FD_SET(STDIN_FILENO,&rfds);
+
+ // Figure out the max fd
+ int MaxFd = FileFD;
+ if (MaxFd < ServerFd)
+ MaxFd = 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 Die(*File);
+ }
+
+ // Handle server IO
+ if (ServerFd != -1 && FD_ISSET(ServerFd,&rfds))
+ {
+ errno = 0;
+ if (In.Read(ServerFd) == false)
+ return Die(*File);
+ }
+
+ if (ServerFd != -1 && FD_ISSET(ServerFd,&wfds))
+ {
+ errno = 0;
+ if (Out.Write(ServerFd) == false)
+ return Die(*File);
+ }
+
+ // Send data to the file
+ if (FileFD != -1 && FD_ISSET(FileFD,&wfds))
+ {
+ if (In.Write(FileFD) == false)
+ return _error->Errno("write",_("Error writing to output file"));
+ }
+
+ // Handle commands from APT
+ if (FD_ISSET(STDIN_FILENO,&rfds))
+ {
+ if (Owner->Run(true) != -1)
+ exit(100);
+ }
+
+ return true;
+}
+ /*}}}*/
+
+// HttpMethod::SendReq - Send the HTTP request /*{{{*/
+// ---------------------------------------------------------------------
+/* This places the http request in the outbound buffer */
+void HttpMethod::SendReq(FetchItem *Itm)
+{
+ URI Uri = Itm->Uri;
+
+ // The HTTP server expects a hostname with a trailing :port
+ std::stringstream Req;
+ string ProperHost;
+
+ if (Uri.Host.find(':') != string::npos)
+ ProperHost = '[' + Uri.Host + ']';
+ else
+ ProperHost = Uri.Host;
+
+ /* RFC 2616 ยง5.1.2 requires absolute URIs for requests to proxies,
+ but while its a must for all servers to accept absolute URIs,
+ it is assumed clients will sent an absolute path for non-proxies */
+ std::string requesturi;
+ if (Server->Proxy.empty() == true || Server->Proxy.Host.empty())
+ requesturi = Uri.Path;
+ else
+ requesturi = Itm->Uri;
+
+ // The "+" is encoded as a workaround for a amazon S3 bug
+ // see LP bugs #1003633 and #1086997.
+ requesturi = QuoteString(requesturi, "+~ ");
+
+ /* Build the request. No keep-alive is included as it is the default
+ in 1.1, can cause problems with proxies, and we are an HTTP/1.1
+ client anyway.
+ C.f. https://tools.ietf.org/wg/httpbis/trac/ticket/158 */
+ Req << "GET " << requesturi << " HTTP/1.1\r\n";
+ if (Uri.Port != 0)
+ Req << "Host: " << ProperHost << ":" << Uri.Port << "\r\n";
+ else
+ Req << "Host: " << ProperHost << "\r\n";
+
+ // generate a cache control header (if needed)
+ if (_config->FindB("Acquire::http::No-Cache",false) == true)
+ Req << "Cache-Control: no-cache\r\n"
+ << "Pragma: no-cache\r\n";
+ else if (Itm->IndexFile == true)
+ Req << "Cache-Control: max-age=" << _config->FindI("Acquire::http::Max-Age",0) << "\r\n";
+ else if (_config->FindB("Acquire::http::No-Store",false) == true)
+ Req << "Cache-Control: no-store\r\n";
+
+ // If we ask for uncompressed files servers might respond with content-
+ // negotiation which lets us end up with compressed files we do not support,
+ // see 657029, 657560 and co, so if we have no extension on the request
+ // ask for text only. As a sidenote: If there is nothing to negotate servers
+ // seem to be nice and ignore it.
+ if (_config->FindB("Acquire::http::SendAccept", true) == true)
+ {
+ size_t const filepos = Itm->Uri.find_last_of('/');
+ string const file = Itm->Uri.substr(filepos + 1);
+ if (flExtension(file) == file)
+ Req << "Accept: text/*\r\n";
+ }
+
+ // Check for a partial file and send if-queries accordingly
+ struct stat SBuf;
+ if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
+ Req << "Range: bytes=" << SBuf.st_size << "-\r\n"
+ << "If-Range: " << TimeRFC1123(SBuf.st_mtime) << "\r\n";
+ else if (Itm->LastModified != 0)
+ Req << "If-Modified-Since: " << TimeRFC1123(Itm->LastModified).c_str() << "\r\n";
+
+ if (Server->Proxy.User.empty() == false || Server->Proxy.Password.empty() == false)
+ Req << "Proxy-Authorization: Basic "
+ << Base64Encode(Server->Proxy.User + ":" + Server->Proxy.Password) << "\r\n";
+
+ maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
+ if (Uri.User.empty() == false || Uri.Password.empty() == false)
+ Req << "Authorization: Basic "
+ << Base64Encode(Uri.User + ":" + Uri.Password) << "\r\n";
+
+ Req << "User-Agent: " << _config->Find("Acquire::http::User-Agent",
+ "Debian APT-HTTP/1.3 (" PACKAGE_VERSION ")") << "\r\n";
+
+ Req << "\r\n";
+
+ if (Debug == true)
+ cerr << Req.str() << endl;
+
+ Server->WriteResponse(Req.str());
+}
+ /*}}}*/
+// HttpMethod::Configuration - Handle a configuration message /*{{{*/
+// ---------------------------------------------------------------------
+/* We stash the desired pipeline depth */
+bool HttpMethod::Configuration(string Message)
+{
+ if (ServerMethod::Configuration(Message) == false)
+ return false;
+
+ AllowRedirect = _config->FindB("Acquire::http::AllowRedirect",true);
+ PipelineDepth = _config->FindI("Acquire::http::Pipeline-Depth",
+ PipelineDepth);
+ Debug = _config->FindB("Debug::Acquire::http",false);
+
+ return true;
+}
+ /*}}}*/
+ServerState * HttpMethod::CreateServerState(URI uri) /*{{{*/
+{
+ return new HttpServerState(uri, this);
+}
+ /*}}}*/
+void HttpMethod::RotateDNS() /*{{{*/
+{
+ ::RotateDNS();
+}
+ /*}}}*/
HCoop / ntk / apt.git / blobdiff