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-rw-r--r--methods/http.cc991
-rw-r--r--methods/http.h136
-rw-r--r--methods/makefile4
-rw-r--r--methods/server.cc665
-rw-r--r--methods/server.h142
5 files changed, 1049 insertions, 889 deletions
diff --git a/methods/http.cc b/methods/http.cc
index 5f0dc03d9..d2f084b04 100644
--- a/methods/http.cc
+++ b/methods/http.cc
@@ -58,15 +58,6 @@
/*}}}*/
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};
@@ -296,20 +287,17 @@ CircleBuf::~CircleBuf()
delete Hash;
}
-// ServerState::ServerState - Constructor /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-ServerState::ServerState(URI Srv,HttpMethod *Owner) : Owner(Owner),
- In(64*1024), Out(4*1024),
- ServerName(Srv)
+// 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();
}
/*}}}*/
-// ServerState::Open - Open a connection to the server /*{{{*/
+// HttpServerState::Open - Open a connection to the server /*{{{*/
// ---------------------------------------------------------------------
/* This opens a connection to the server. */
-bool ServerState::Open()
+bool HttpServerState::Open()
{
// Use the already open connection if possible.
if (ServerFd != -1)
@@ -373,72 +361,18 @@ bool ServerState::Open()
return true;
}
/*}}}*/
-// ServerState::Close - Close a connection to the server /*{{{*/
+// HttpServerState::Close - Close a connection to the server /*{{{*/
// ---------------------------------------------------------------------
/* */
-bool ServerState::Close()
+bool HttpServerState::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()
+// HttpServerState::RunData - Transfer the data from the socket /*{{{*/
+bool HttpServerState::RunData(FileFd * const File)
{
State = Data;
@@ -456,7 +390,7 @@ bool ServerState::RunData()
if (In.WriteTillEl(Data,true) == true)
break;
}
- while ((Last = Owner->Go(false,this)) == true);
+ while ((Last = Go(false, File)) == true);
if (Last == false)
return false;
@@ -474,7 +408,7 @@ bool ServerState::RunData()
if (In.WriteTillEl(Data,true) == true && Data.length() <= 2)
break;
}
- while ((Last = Owner->Go(false,this)) == true);
+ while ((Last = Go(false, File)) == true);
if (Last == false)
return false;
return !_error->PendingError();
@@ -482,7 +416,7 @@ bool ServerState::RunData()
// Transfer the block
In.Limit(Len);
- while (Owner->Go(true,this) == true)
+ while (Go(true, File) == true)
if (In.IsLimit() == true)
break;
@@ -498,7 +432,7 @@ bool ServerState::RunData()
if (In.WriteTillEl(Data,true) == true)
break;
}
- while ((Last = Owner->Go(false,this)) == true);
+ while ((Last = Go(false, File)) == true);
if (Last == false)
return false;
}
@@ -521,147 +455,217 @@ bool ServerState::RunData()
In.Limit(-1);
return !_error->PendingError();
}
- while (Owner->Go(true,this) == true);
+ while (Go(true, File) == true);
}
- return Owner->Flush(this) && !_error->PendingError();
+ return Owner->Flush() && !_error->PendingError();
}
/*}}}*/
-// ServerState::HeaderLine - Process a header line /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-bool ServerState::HeaderLine(string Line)
+bool HttpServerState::ReadHeaderLines(std::string &Data) /*{{{*/
{
- if (Line.empty() == true)
- return true;
+ 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);
+}
+ /*}}}*/
+bool HttpServerState::IsOpen() /*{{{*/
+{
+ return (ServerFd != -1);
+}
+ /*}}}*/
+bool HttpServerState::InitHashes(FileFd &File) /*{{{*/
+{
+ delete In.Hash;
+ In.Hash = new Hashes;
- string::size_type Pos = Line.find(' ');
- if (Pos == string::npos || Pos+1 > Line.length())
+ // Set the expected size and read file for the hashes
+ if (StartPos >= 0)
{
- // 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++;
+ File.Truncate(StartPos);
+
+ return In.Hash->AddFD(File, StartPos);
}
+ return true;
+}
+ /*}}}*/
+Hashes * HttpServerState::GetHashes() /*{{{*/
+{
+ return In.Hash;
+}
+ /*}}}*/
+// HttpServerState::Die - The server has closed the connection. /*{{{*/
+bool HttpServerState::Die(FileFd &File)
+{
+ unsigned int LErrno = errno;
- // 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)
+ // Dump the buffer to the file
+ if (State == ServerState::Data)
{
- // 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
+ // 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)
{
- 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"));
- }
+ if (In.Write(File.Fd()) == false)
+ return _error->Errno("write",_("Error writing to the file"));
- /* 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;
+ // Done
+ if (In.IsLimit() == true)
+ return true;
}
+ }
- return true;
- }
-
- if (stringcasecmp(Tag,"Content-Length:") == 0)
+ // See if this is because the server finished the data stream
+ if (In.IsLimit() == false && State != HttpServerState::Header &&
+ Encoding != HttpServerState::Closes)
{
- 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"));
- else if (Size == 0)
- HaveContent = false;
- return true;
+ 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"));
}
-
- if (stringcasecmp(Tag,"Content-Type:") == 0)
+ else
{
- HaveContent = true;
+ 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;
}
-
- if (stringcasecmp(Tag,"Content-Range:") == 0)
- {
- HaveContent = true;
- // §14.16 says 'byte-range-resp-spec' should be a '*' in case of 416
- if (Result == 416 && sscanf(Val.c_str(), "bytes */%llu",&Size) == 1)
+ 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)
{
- StartPos = 1; // ignore Content-Length, it would override Size
- HaveContent = false;
+ if (In.Write(File->Fd()) == false)
+ return _error->Errno("write",_("Error writing to file"));
+ if (In.IsLimit() == true)
+ return true;
}
- else 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 (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);
- if (stringcasecmp(Tag,"Transfer-Encoding:") == 0)
+ // 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)
{
- HaveContent = true;
- if (stringcasecmp(Val,"chunked") == 0)
- Encoding = Chunked;
- return true;
+ if (errno == EINTR)
+ return true;
+ return _error->Errno("select",_("Select failed"));
}
-
- if (stringcasecmp(Tag,"Connection:") == 0)
+
+ if (Res == 0)
{
- if (stringcasecmp(Val,"close") == 0)
- Persistent = false;
- if (stringcasecmp(Val,"keep-alive") == 0)
- Persistent = true;
- return true;
+ _error->Error(_("Connection timed out"));
+ return Die(*File);
}
- if (stringcasecmp(Tag,"Last-Modified:") == 0)
+ // Handle server IO
+ if (ServerFd != -1 && FD_ISSET(ServerFd,&rfds))
{
- if (RFC1123StrToTime(Val.c_str(), Date) == false)
- return _error->Error(_("Unknown date format"));
- return true;
+ 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);
}
- if (stringcasecmp(Tag,"Location:") == 0)
+ // Send data to the file
+ if (FileFD != -1 && FD_ISSET(FileFD,&wfds))
{
- Location = Val;
- return true;
+ 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;
}
/*}}}*/
@@ -669,7 +673,7 @@ bool ServerState::HeaderLine(string Line)
// HttpMethod::SendReq - Send the HTTP request /*{{{*/
// ---------------------------------------------------------------------
/* This places the http request in the outbound buffer */
-void HttpMethod::SendReq(FetchItem *Itm,CircleBuf &Out)
+void HttpMethod::SendReq(FetchItem *Itm)
{
URI Uri = Itm->Uri;
@@ -695,7 +699,7 @@ void HttpMethod::SendReq(FetchItem *Itm,CircleBuf &Out)
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 (Proxy.empty() == true || Proxy.Host.empty())
+ if (Server->Proxy.empty() == true || Server->Proxy.Host.empty())
requesturi = Uri.Path;
else
requesturi = Itm->Uri;
@@ -763,9 +767,9 @@ void HttpMethod::SendReq(FetchItem *Itm,CircleBuf &Out)
}
}
- if (Proxy.User.empty() == false || Proxy.Password.empty() == false)
+ if (Server->Proxy.User.empty() == false || Server->Proxy.Password.empty() == false)
Req += string("Proxy-Authorization: Basic ") +
- Base64Encode(Proxy.User + ":" + Proxy.Password) + "\r\n";
+ 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)
@@ -779,360 +783,18 @@ void HttpMethod::SendReq(FetchItem *Itm,CircleBuf &Out)
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;
+ Server->WriteResponse(Req);
}
/*}}}*/
-// 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)
- NextURI = URI::SiteOnly(Uri);
- 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 */
- }
- // retry after an invalid range response without partial data
- else if (Srv->Result == 416)
- {
- struct stat SBuf;
- if (stat(Queue->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
- {
- if ((unsigned long long)SBuf.st_size == Srv->Size)
- {
- // the file is completely downloaded, but was not moved
- Srv->StartPos = Srv->Size;
- Srv->Result = 200;
- Srv->HaveContent = false;
- }
- else if (unlink(Queue->DestFile.c_str()) == 0)
- {
- NextURI = Queue->Uri;
- return TRY_AGAIN_OR_REDIRECT;
- }
- }
- }
-
- /* 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)
+ if (ServerMethod::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);
@@ -1144,260 +806,6 @@ bool HttpMethod::Configuration(string Message)
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 = true;
- if (Server->HaveContent)
- 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 /*{{{*/
// ---------------------------------------------------------------------
/* */
@@ -1450,5 +858,8 @@ bool HttpMethod::AutoDetectProxy()
return true;
}
/*}}}*/
-
-
+ServerState * HttpMethod::CreateServerState(URI uri) /*{{{*/
+{
+ return new HttpServerState(uri, this);
+}
+ /*}}}*/
diff --git a/methods/http.h b/methods/http.h
index 7446119cd..112ce171d 100644
--- a/methods/http.h
+++ b/methods/http.h
@@ -15,6 +15,8 @@
#include <string>
+#include "server.h"
+
using std::cout;
using std::endl;
@@ -31,7 +33,7 @@ class CircleBuf
unsigned long long StrPos;
unsigned long long MaxGet;
struct timeval Start;
-
+
static unsigned long long BwReadLimit;
static unsigned long long BwTickReadData;
static struct timeval BwReadTick;
@@ -54,21 +56,20 @@ class CircleBuf
return Sz;
}
void FillOut();
-
+
public:
-
Hashes *Hash;
-
+
// Read data in
bool Read(int Fd);
bool Read(std::string Data);
-
+
// Write data out
bool Write(int Fd);
bool WriteTillEl(std::string &Data,bool Single = false);
-
+
// Control the write limit
- void Limit(long long Max) {if (Max == -1) MaxGet = 0-1; else MaxGet = OutP + Max;}
+ void Limit(long long Max) {if (Max == -1) MaxGet = 0-1; else MaxGet = OutP + Max;}
bool IsLimit() const {return MaxGet == OutP;};
void Print() const {cout << MaxGet << ',' << OutP << endl;};
@@ -84,114 +85,55 @@ class CircleBuf
~CircleBuf();
};
-struct ServerState
+struct HttpServerState: public ServerState
{
- // This is the last parsed Header Line
- unsigned int Major;
- unsigned int Minor;
- unsigned int Result;
- char Code[360];
-
- // These are some statistics from the last parsed header lines
- unsigned long long Size;
- signed long long StartPos;
- time_t Date;
- bool HaveContent;
- enum {Chunked,Stream,Closes} Encoding;
- enum {Header, Data} State;
- bool Persistent;
- std::string Location;
-
- // This is a Persistent attribute of the server itself.
- bool Pipeline;
-
- HttpMethod *Owner;
-
// This is the connection itself. Output is data FROM the server
CircleBuf In;
CircleBuf Out;
int ServerFd;
- URI ServerName;
-
- bool HeaderLine(std::string Line);
- bool Comp(URI Other) const {return Other.Host == ServerName.Host && Other.Port == ServerName.Port;};
- void Reset() {Major = 0; Minor = 0; Result = 0; Code[0] = '\0'; Size = 0;
- StartPos = 0; Encoding = Closes; time(&Date); HaveContent = false;
- State = Header; Persistent = false; ServerFd = -1;
- Pipeline = true;};
-
- /** \brief Result of the header acquire */
- enum RunHeadersResult {
- /** \brief Header ok */
- RUN_HEADERS_OK,
- /** \brief IO error while retrieving */
- RUN_HEADERS_IO_ERROR,
- /** \brief Parse error after retrieving */
- RUN_HEADERS_PARSE_ERROR,
- };
- /** \brief Get the headers before the data */
- RunHeadersResult RunHeaders();
- /** \brief Transfer the data from the socket */
- bool RunData();
-
- bool Open();
- bool Close();
-
- ServerState(URI Srv,HttpMethod *Owner);
- ~ServerState() {Close();};
+
+ protected:
+ virtual bool ReadHeaderLines(std::string &Data);
+ virtual bool LoadNextResponse(bool const ToFile, FileFd * const File);
+ virtual bool WriteResponse(std::string const &Data);
+
+ public:
+ virtual void Reset() { ServerState::Reset(); ServerFd = -1; };
+
+ virtual bool RunData(FileFd * const File);
+
+ virtual bool Open();
+ virtual bool IsOpen();
+ virtual bool Close();
+ virtual bool InitHashes(FileFd &File);
+ virtual Hashes * GetHashes();
+ virtual bool Die(FileFd &File);
+ virtual bool Flush(FileFd * const File);
+ virtual bool Go(bool ToFile, FileFd * const File);
+
+ HttpServerState(URI Srv, HttpMethod *Owner);
+ virtual ~HttpServerState() {Close();};
};
-class HttpMethod : public pkgAcqMethod
+class HttpMethod : public ServerMethod
{
- void SendReq(FetchItem *Itm,CircleBuf &Out);
- bool Go(bool ToFile,ServerState *Srv);
- bool Flush(ServerState *Srv);
- bool ServerDie(ServerState *Srv);
-
- /** \brief Result of the header parsing */
- enum DealWithHeadersResult {
- /** \brief The file is open and ready */
- FILE_IS_OPEN,
- /** \brief We got a IMS hit, the file has not changed */
- IMS_HIT,
- /** \brief The server reported a unrecoverable error */
- ERROR_UNRECOVERABLE,
- /** \brief The server reported a error with a error content page */
- ERROR_WITH_CONTENT_PAGE,
- /** \brief An error on the client side */
- ERROR_NOT_FROM_SERVER,
- /** \brief A redirect or retry request */
- TRY_AGAIN_OR_REDIRECT
- };
- /** \brief Handle the retrieved header data */
- DealWithHeadersResult DealWithHeaders(FetchResult &Res,ServerState *Srv);
+ public:
+ virtual void SendReq(FetchItem *Itm);
/** \brief Try to AutoDetect the proxy */
bool AutoDetectProxy();
virtual bool Configuration(std::string Message);
-
- // In the event of a fatal signal this file will be closed and timestamped.
- static std::string FailFile;
- static int FailFd;
- static time_t FailTime;
- static void SigTerm(int);
+
+ virtual ServerState * CreateServerState(URI uri);
protected:
- virtual bool Fetch(FetchItem *);
-
- std::string NextURI;
std::string AutoDetectProxyCmd;
public:
- friend struct ServerState;
-
- FileFd *File;
- ServerState *Server;
-
- int Loop();
-
- HttpMethod() : pkgAcqMethod("1.2",Pipeline | SendConfig)
+ friend struct HttpServerState;
+
+ HttpMethod() : ServerMethod("1.2",Pipeline | SendConfig)
{
File = 0;
Server = 0;
diff --git a/methods/makefile b/methods/makefile
index 294c55d23..f8098de74 100644
--- a/methods/makefile
+++ b/methods/makefile
@@ -48,7 +48,7 @@ include $(PROGRAM_H)
PROGRAM=http
SLIBS = -lapt-pkg $(SOCKETLIBS) $(INTLLIBS)
LIB_MAKES = apt-pkg/makefile
-SOURCE = http.cc http_main.cc rfc2553emu.cc connect.cc
+SOURCE = http.cc http_main.cc rfc2553emu.cc connect.cc server.cc
include $(PROGRAM_H)
# The https method
@@ -83,7 +83,7 @@ include $(PROGRAM_H)
PROGRAM=mirror
SLIBS = -lapt-pkg $(SOCKETLIBS)
LIB_MAKES = apt-pkg/makefile
-SOURCE = mirror.cc http.cc rfc2553emu.cc connect.cc
+SOURCE = mirror.cc http.cc rfc2553emu.cc connect.cc server.cc
include $(PROGRAM_H)
# SSH method symlink
diff --git a/methods/server.cc b/methods/server.cc
new file mode 100644
index 000000000..a2128441c
--- /dev/null
+++ b/methods/server.cc
@@ -0,0 +1,665 @@
+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+/* ######################################################################
+
+ HTTP and HTTPS share a lot of common code and these classes are
+ exactly the dumping ground for this common code
+
+ ##################################################################### */
+ /*}}}*/
+// 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 ServerMethod::FailFile;
+int ServerMethod::FailFd = -1;
+time_t ServerMethod::FailTime = 0;
+
+// 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(FileFd * const File)
+{
+ 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 (ReadHeaderLines(Data) == false)
+ continue;
+
+ if (Owner->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 (LoadNextResponse(false, File) == true);
+
+ return RUN_HEADERS_IO_ERROR;
+}
+ /*}}}*/
+// 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 (Owner->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"));
+ else if (Size == 0)
+ HaveContent = false;
+ return true;
+ }
+
+ if (stringcasecmp(Tag,"Content-Type:") == 0)
+ {
+ HaveContent = true;
+ return true;
+ }
+
+ if (stringcasecmp(Tag,"Content-Range:") == 0)
+ {
+ HaveContent = true;
+
+ // §14.16 says 'byte-range-resp-spec' should be a '*' in case of 416
+ if (Result == 416 && sscanf(Val.c_str(), "bytes */%llu",&Size) == 1)
+ {
+ StartPos = 1; // ignore Content-Length, it would override Size
+ HaveContent = false;
+ }
+ else 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;
+}
+ /*}}}*/
+// ServerState::ServerState - Constructor /*{{{*/
+ServerState::ServerState(URI Srv, ServerMethod *Owner) : ServerName(Srv), TimeOut(120), Owner(Owner)
+{
+ Reset();
+}
+ /*}}}*/
+
+bool ServerMethod::Configuration(string Message) /*{{{*/
+{
+ return pkgAcqMethod::Configuration(Message);
+}
+ /*}}}*/
+
+// ServerMethod::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).
+ */
+ServerMethod::DealWithHeadersResult
+ServerMethod::DealWithHeaders(FetchResult &Res)
+{
+ // Not Modified
+ if (Server->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
+ && (Server->Result > 300 && Server->Result < 400)
+ && (Server->Result != 300 // Multiple Choices
+ && Server->Result != 304 // Not Modified
+ && Server->Result != 306)) // (Not part of HTTP/1.1, reserved)
+ {
+ if (Server->Location.empty() == true);
+ else if (Server->Location[0] == '/' && Queue->Uri.empty() == false)
+ {
+ URI Uri = Queue->Uri;
+ if (Uri.Host.empty() == false)
+ NextURI = URI::SiteOnly(Uri);
+ else
+ NextURI.clear();
+ NextURI.append(DeQuoteString(Server->Location));
+ return TRY_AGAIN_OR_REDIRECT;
+ }
+ else
+ {
+ NextURI = DeQuoteString(Server->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 */
+ }
+ // retry after an invalid range response without partial data
+ else if (Server->Result == 416)
+ {
+ struct stat SBuf;
+ if (stat(Queue->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
+ {
+ if ((unsigned long long)SBuf.st_size == Server->Size)
+ {
+ // the file is completely downloaded, but was not moved
+ Server->StartPos = Server->Size;
+ Server->Result = 200;
+ Server->HaveContent = false;
+ }
+ else if (unlink(Queue->DestFile.c_str()) == 0)
+ {
+ NextURI = Queue->Uri;
+ return TRY_AGAIN_OR_REDIRECT;
+ }
+ }
+ }
+
+ /* We have a reply we dont handle. This should indicate a perm server
+ failure */
+ if (Server->Result < 200 || Server->Result >= 300)
+ {
+ char err[255];
+ snprintf(err,sizeof(err)-1,"HttpError%i",Server->Result);
+ SetFailReason(err);
+ _error->Error("%u %s",Server->Result,Server->Code);
+ if (Server->HaveContent == true)
+ return ERROR_WITH_CONTENT_PAGE;
+ return ERROR_UNRECOVERABLE;
+ }
+
+ // This is some sort of 2xx 'data follows' reply
+ Res.LastModified = Server->Date;
+ Res.Size = Server->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 = Server->Date;
+
+ if (Server->InitHashes(*File) == false)
+ {
+ _error->Errno("read",_("Problem hashing file"));
+ return ERROR_NOT_FROM_SERVER;
+ }
+ if (Server->StartPos > 0)
+ Res.ResumePoint = Server->StartPos;
+
+ SetNonBlock(File->Fd(),true);
+ return FILE_IS_OPEN;
+}
+ /*}}}*/
+// ServerMethod::SigTerm - Handle a fatal signal /*{{{*/
+// ---------------------------------------------------------------------
+/* This closes and timestamps the open file. This is neccessary to get
+ resume behavoir on user abort */
+void ServerMethod::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);
+}
+ /*}}}*/
+// ServerMethod::Fetch - Fetch an item /*{{{*/
+// ---------------------------------------------------------------------
+/* This adds an item to the pipeline. We keep the pipeline at a fixed
+ depth. */
+bool ServerMethod::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);
+ continue;
+ }
+ }
+
+ return true;
+};
+ /*}}}*/
+// ServerMethod::Loop - Main loop /*{{{*/
+int ServerMethod::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 = CreateServerState(Queue->Uri);
+ }
+ /* 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->IsOpen() == false)
+ 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(File))
+ {
+ 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))
+ {
+ // Ok, the file is Open
+ case FILE_IS_OPEN:
+ {
+ URIStart(Res);
+
+ // Run the data
+ bool Result = true;
+ if (Server->HaveContent)
+ Result = Server->RunData(File);
+
+ /* 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->GetHashes());
+ URIDone(Res);
+ }
+ else
+ {
+ if (Server->IsOpen() == false)
+ {
+ 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(File);
+ 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(File);
+ 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;
+}
+ /*}}}*/
diff --git a/methods/server.h b/methods/server.h
new file mode 100644
index 000000000..2d43b332f
--- /dev/null
+++ b/methods/server.h
@@ -0,0 +1,142 @@
+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+/* ######################################################################
+
+ Classes dealing with the abstraction of talking to a end via a text
+ protocol like HTTP (which is used by the http and https methods)
+
+ ##################################################################### */
+ /*}}}*/
+
+#ifndef APT_SERVER_H
+#define APT_SERVER_H
+
+#include <apt-pkg/strutl.h>
+
+#include <string>
+
+using std::cout;
+using std::endl;
+
+class Hashes;
+class ServerMethod;
+class FileFd;
+
+struct ServerState
+{
+ // This is the last parsed Header Line
+ unsigned int Major;
+ unsigned int Minor;
+ unsigned int Result;
+ char Code[360];
+
+ // These are some statistics from the last parsed header lines
+ unsigned long long Size;
+ signed long long StartPos;
+ time_t Date;
+ bool HaveContent;
+ enum {Chunked,Stream,Closes} Encoding;
+ enum {Header, Data} State;
+ bool Persistent;
+ std::string Location;
+
+ // This is a Persistent attribute of the server itself.
+ bool Pipeline;
+ URI ServerName;
+ URI Proxy;
+ unsigned long TimeOut;
+
+ protected:
+ ServerMethod *Owner;
+
+ bool HeaderLine(std::string Line);
+ virtual bool ReadHeaderLines(std::string &Data) = 0;
+ virtual bool LoadNextResponse(bool const ToFile, FileFd * const File) = 0;
+
+ public:
+ /** \brief Result of the header acquire */
+ enum RunHeadersResult {
+ /** \brief Header ok */
+ RUN_HEADERS_OK,
+ /** \brief IO error while retrieving */
+ RUN_HEADERS_IO_ERROR,
+ /** \brief Parse error after retrieving */
+ RUN_HEADERS_PARSE_ERROR,
+ };
+ /** \brief Get the headers before the data */
+ RunHeadersResult RunHeaders(FileFd * const File);
+
+ bool Comp(URI Other) const {return Other.Host == ServerName.Host && Other.Port == ServerName.Port;};
+ virtual void Reset() {Major = 0; Minor = 0; Result = 0; Code[0] = '\0'; Size = 0;
+ StartPos = 0; Encoding = Closes; time(&Date); HaveContent = false;
+ State = Header; Persistent = false; Pipeline = true;};
+ virtual bool WriteResponse(std::string const &Data) = 0;
+
+ /** \brief Transfer the data from the socket */
+ virtual bool RunData(FileFd * const File) = 0;
+
+ virtual bool Open() = 0;
+ virtual bool IsOpen() = 0;
+ virtual bool Close() = 0;
+ virtual bool InitHashes(FileFd &File) = 0;
+ virtual Hashes * GetHashes() = 0;
+ virtual bool Die(FileFd &File) = 0;
+ virtual bool Flush(FileFd * const File) = 0;
+ virtual bool Go(bool ToFile, FileFd * const File) = 0;
+
+ ServerState(URI Srv, ServerMethod *Owner);
+ virtual ~ServerState() {};
+};
+
+class ServerMethod : public pkgAcqMethod
+{
+ protected:
+ virtual bool Fetch(FetchItem *);
+
+ ServerState *Server;
+ std::string NextURI;
+ FileFd *File;
+
+ unsigned long PipelineDepth;
+ bool AllowRedirect;
+
+ public:
+ bool Debug;
+
+ /** \brief Result of the header parsing */
+ enum DealWithHeadersResult {
+ /** \brief The file is open and ready */
+ FILE_IS_OPEN,
+ /** \brief We got a IMS hit, the file has not changed */
+ IMS_HIT,
+ /** \brief The server reported a unrecoverable error */
+ ERROR_UNRECOVERABLE,
+ /** \brief The server reported a error with a error content page */
+ ERROR_WITH_CONTENT_PAGE,
+ /** \brief An error on the client side */
+ ERROR_NOT_FROM_SERVER,
+ /** \brief A redirect or retry request */
+ TRY_AGAIN_OR_REDIRECT
+ };
+ /** \brief Handle the retrieved header data */
+ DealWithHeadersResult DealWithHeaders(FetchResult &Res);
+
+ // In the event of a fatal signal this file will be closed and timestamped.
+ static std::string FailFile;
+ static int FailFd;
+ static time_t FailTime;
+ static void SigTerm(int);
+
+ virtual bool Configuration(std::string Message);
+ virtual bool Flush() { return Server->Flush(File); };
+
+ int Loop();
+
+ virtual void SendReq(FetchItem *Itm) = 0;
+ virtual ServerState * CreateServerState(URI uri) = 0;
+
+ ServerMethod(const char *Ver,unsigned long Flags = 0) : pkgAcqMethod(Ver, Flags), PipelineDepth(0), AllowRedirect(false), Debug(false) {};
+ virtual ~ServerMethod() {};
+};
+
+#endif
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