// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: http.cc,v 1.1 1998/11/01 05:30:47 jgg Exp $
+// $Id: http.cc,v 1.43 1999/12/10 23:40:29 jgg Exp $
/* ######################################################################
HTTP Aquire Method - This is the HTTP aquire method for APT.
#include <sys/time.h>
#include <utime.h>
#include <unistd.h>
+#include <signal.h>
#include <stdio.h>
+#include <errno.h>
// Internet stuff
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <arpa/inet.h>
#include <netdb.h>
+#include "connect.h"
+#include "rfc2553emu.h"
#include "http.h"
+
/*}}}*/
+string HttpMethod::FailFile;
+int HttpMethod::FailFd = -1;
+time_t HttpMethod::FailTime = 0;
+unsigned long PipelineDepth = 10;
+unsigned long TimeOut = 120;
+bool Debug = false;
+
// CircleBuf::CircleBuf - Circular input buffer /*{{{*/
// ---------------------------------------------------------------------
/* */
// ---------------------------------------------------------------------
/* */
ServerState::ServerState(URI Srv,HttpMethod *Owner) : Owner(Owner),
- In(64*1024), Out(1*1024),
+ In(64*1024), Out(4*1024),
ServerName(Srv)
{
Reset();
// ---------------------------------------------------------------------
/* This opens a connection to the server. */
string LastHost;
-in_addr LastHostA;
+int LastPort = 0;
+struct addrinfo *LastHostAddr = 0;
bool ServerState::Open()
{
+ // Use the already open connection if possible.
+ if (ServerFd != -1)
+ return true;
+
Close();
+ In.Reset();
+ Out.Reset();
+
+ // Determine the proxy setting
+ if (getenv("http_proxy") == 0)
+ {
+ string DefProxy = _config->Find("Acquire::http::Proxy");
+ string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
+ if (SpecificProxy.empty() == false)
+ {
+ if (SpecificProxy == "DIRECT")
+ Proxy = "";
+ else
+ Proxy = SpecificProxy;
+ }
+ else
+ Proxy = DefProxy;
+ }
+ else
+ Proxy = getenv("http_proxy");
- int Port;
- string Host;
+ // Parse no_proxy, a , seperated list of hosts
+ if (getenv("no_proxy") != 0)
+ {
+ const char *Start = getenv("no_proxy");
+ for (const char *Cur = Start; true ; Cur++)
+ {
+ if (*Cur != ',' && *Cur != 0)
+ continue;
+ if (stringcasecmp(ServerName.Host.begin(),ServerName.Host.end(),
+ Start,Cur) == 0)
+ {
+ Proxy = "";
+ break;
+ }
+
+ Start = Cur + 1;
+ if (*Cur == 0)
+ break;
+ }
+ }
- if (Proxy.empty() == false)
+ // Determine what host and port to use based on the proxy settings
+ int Port = 0;
+ string Host;
+ if (Proxy.empty() == true)
{
- Port = ServerName.Port;
+ if (ServerName.Port != 0)
+ Port = ServerName.Port;
Host = ServerName.Host;
}
else
{
- Port = Proxy.Port;
+ if (Proxy.Port != 0)
+ Port = Proxy.Port;
Host = Proxy.Host;
}
- if (LastHost != Host)
- {
- Owner->Status("Connecting to %s",Host.c_str());
-
- // Lookup the host
- hostent *Addr = gethostbyname(Host.c_str());
- if (Addr == 0)
- return _error->Errno("gethostbyname","Could not lookup host %s",Host.c_str());
- LastHost = Host;
- LastHostA = *(in_addr *)(Addr->h_addr_list[0]);
- }
-
- Owner->Status("Connecting to %s (%s)",Host.c_str(),inet_ntoa(LastHostA));
-
- // Get a socket
- if ((ServerFd = socket(AF_INET,SOCK_STREAM,0)) < 0)
- return _error->Errno("socket","Could not create a socket");
+ // Connect to the remote server
+ if (Connect(Host,Port,"http",80,ServerFd,TimeOut,Owner) == false)
+ return false;
- // Connect to the server
- struct sockaddr_in server;
- server.sin_family = AF_INET;
- server.sin_port = htons(Port);
- server.sin_addr = LastHostA;
- if (connect(ServerFd,(sockaddr *)&server,sizeof(server)) < 0)
- return _error->Errno("socket","Could not create a socket");
-
- SetNonBlock(ServerFd,true);
return true;
}
/*}}}*/
{
close(ServerFd);
ServerFd = -1;
- In.Reset();
- Out.Reset();
return true;
}
/*}}}*/
// ServerState::RunHeaders - Get the headers before the data /*{{{*/
// ---------------------------------------------------------------------
-/* */
-bool ServerState::RunHeaders()
+/* Returns 0 if things are OK, 1 if an IO error occursed and 2 if a header
+ parse error occured */
+int ServerState::RunHeaders()
{
State = Header;
Result = 0;
Size = 0;
StartPos = 0;
- Encoding = Closes;
+ Encoding = Closes;
+ HaveContent = false;
time(&Date);
do
string::const_iterator J = I;
for (; J != Data.end() && *J != '\n' && *J != '\r';J++);
if (HeaderLine(string(I,J-I)) == false)
- return false;
+ return 2;
I = J;
}
- return true;
+ return 0;
}
while (Owner->Go(false,this) == true);
-
- return false;
+
+ return 1;
}
/*}}}*/
// ServerState::RunData - Transfer the data from the socket /*{{{*/
while ((Last = Owner->Go(false,this)) == true);
if (Last == false)
return false;
- return true;
+ return !_error->PendingError();
}
// Transfer the block
while ((Last = Owner->Go(false,this)) == true);
if (Last == false)
return false;
- }
+ }
}
else
{
continue;
In.Limit(-1);
- return true;
+ return !_error->PendingError();
}
while (Owner->Go(true,this) == true);
}
- return Owner->Flush(this);
+ return Owner->Flush(this) && !_error->PendingError();
}
/*}}}*/
// ServerState::HeaderLine - Process a header line /*{{{*/
{
if (Line.empty() == true)
return true;
-
+
// The http server might be trying to do something evil.
if (Line.length() >= MAXLEN)
return _error->Error("Got a single header line over %u chars",MAXLEN);
string::size_type Pos = Line.find(' ');
if (Pos == string::npos || Pos+1 > Line.length())
- return _error->Error("Bad header line");
-
- string Tag = string(Line,0,Pos);
- string Val = string(Line,Pos+1);
+ {
+ // 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++;
+ }
- if (stringcasecmp(Tag,"HTTP") == 0)
+ // 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.begin(),Tag.begin()+4,"HTTP") == 0)
{
// Evil servers return no version
if (Line[4] == '/')
return true;
}
- if (stringcasecmp(Tag,"Content-Length:"))
+ if (stringcasecmp(Tag,"Content-Length:") == 0)
{
if (Encoding == Closes)
Encoding = Stream;
+ HaveContent = true;
// The length is already set from the Content-Range header
if (StartPos != 0)
return true;
}
- if (stringcasecmp(Tag,"Content-Range:"))
+ if (stringcasecmp(Tag,"Content-Type:") == 0)
+ {
+ HaveContent = true;
+ return true;
+ }
+
+ if (stringcasecmp(Tag,"Content-Range:") == 0)
{
+ HaveContent = true;
+
if (sscanf(Val.c_str(),"bytes %lu-%*u/%lu",&StartPos,&Size) != 2)
return _error->Error("The http server sent an invalid Content-Range header");
if ((unsigned)StartPos > Size)
return true;
}
- if (stringcasecmp(Tag,"Transfer-Encoding:"))
+ if (stringcasecmp(Tag,"Transfer-Encoding:") == 0)
{
- if (stringcasecmp(Val,"chunked"))
+ HaveContent = true;
+ if (stringcasecmp(Val,"chunked") == 0)
Encoding = Chunked;
+
return true;
}
- if (stringcasecmp(Tag,"Last-Modified:"))
+ if (stringcasecmp(Tag,"Last-Modified:") == 0)
{
if (StrToTime(Val,Date) == false)
return _error->Error("Unknown date format");
void HttpMethod::SendReq(FetchItem *Itm,CircleBuf &Out)
{
URI Uri = Itm->Uri;
-
+
// The HTTP server expects a hostname with a trailing :port
- char Buf[300];
+ char Buf[1000];
string ProperHost = Uri.Host;
if (Uri.Port != 0)
{
ProperHost += Buf;
}
- // Build the request
+ // 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)
sprintf(Buf,"GET %s HTTP/1.1\r\nHost: %s\r\nConnection: keep-alive\r\n",
- Uri.Path.c_str(),ProperHost.c_str());
+ 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());
- string Req = Buf;
+ 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",60*60*24));
+ else
+ {
+ if (_config->FindB("Acquire::http::No-Store",false) == true)
+ strcat(Buf,"Cache-Control: no-store\r\n");
+ }
+ }
+ }
+ string Req = Buf;
+
// Check for a partial file
struct stat SBuf;
if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
{
// In this case we send an if-range query with a range header
- sprintf(Buf,"Range: bytes=%li-\r\nIf-Range: %s\r\n",SBuf.st_size - 1,
+ sprintf(Buf,"Range: bytes=%li-\r\nIf-Range: %s\r\n",(long)SBuf.st_size - 1,
TimeRFC1123(SBuf.st_mtime).c_str());
Req += Buf;
}
}
}
-/* if (ProxyAuth.empty() == false)
- Req += string("Proxy-Authorization: Basic ") + Base64Encode(ProxyAuth) + "\r\n";*/
+ if (Proxy.User.empty() == false || Proxy.Password.empty() == false)
+ Req += string("Proxy-Authorization: Basic ") +
+ Base64Encode(Proxy.User + ":" + Proxy.Password) + "\r\n";
Req += "User-Agent: Debian APT-HTTP/1.2\r\n\r\n";
+
+ if (Debug == true)
+ cerr << Req << endl;
+
Out.Read(Req);
}
/*}}}*/
bool HttpMethod::Go(bool ToFile,ServerState *Srv)
{
// Server has closed the connection
- if (Srv->ServerFd == -1 && Srv->In.WriteSpace() == false)
+ if (Srv->ServerFd == -1 && (Srv->In.WriteSpace() == false ||
+ ToFile == false))
return false;
- fd_set rfds,wfds,efds;
+ fd_set rfds,wfds;
FD_ZERO(&rfds);
FD_ZERO(&wfds);
- FD_ZERO(&efds);
// Add the server
if (Srv->Out.WriteSpace() == true && Srv->ServerFd != -1)
// Add stdin
FD_SET(STDIN_FILENO,&rfds);
- // Error Set
- if (FileFD != -1)
- FD_SET(FileFD,&efds);
- if (Srv->ServerFd != -1)
- FD_SET(Srv->ServerFd,&efds);
-
// Figure out the max fd
int MaxFd = FileFD;
if (MaxFd < Srv->ServerFd)
MaxFd = Srv->ServerFd;
-
+
// Select
struct timeval tv;
- tv.tv_sec = 120;
+ tv.tv_sec = TimeOut;
tv.tv_usec = 0;
int Res = 0;
- if ((Res = select(MaxFd+1,&rfds,&wfds,&efds,&tv)) < 0)
+ if ((Res = select(MaxFd+1,&rfds,&wfds,0,&tv)) < 0)
return _error->Errno("select","Select failed");
if (Res == 0)
return ServerDie(Srv);
}
- // Some kind of exception (error) on the sockets, die
- if ((FileFD != -1 && FD_ISSET(FileFD,&efds)) ||
- (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&efds)))
- return _error->Error("Socket Exception");
-
// Handle server IO
if (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&rfds))
{
// Handle commands from APT
if (FD_ISSET(STDIN_FILENO,&rfds))
{
- if (Run(true) != 0)
+ if (Run(true) != -1)
exit(100);
}
{
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)
/* */
bool HttpMethod::ServerDie(ServerState *Srv)
{
+ unsigned int LErrno = errno;
+
// Dump the buffer to the file
if (Srv->State == ServerState::Data)
{
{
if (Srv->In.Write(File->Fd()) == false)
return _error->Errno("write","Error writing to the file");
+
+ // Done
+ if (Srv->In.IsLimit() == true)
+ return true;
}
}
if (Srv->In.IsLimit() == false && Srv->State != ServerState::Header &&
Srv->Encoding != ServerState::Closes)
{
- if (errno == 0)
+ 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
to do. Returns
0 - File is open,
1 - IMS hit
- 3 - Unrecoverable error */
+ 3 - Unrecoverable error
+ 4 - Error with error content page
+ 5 - Unrecoverable non-server error (close the connection) */
int HttpMethod::DealWithHeaders(FetchResult &Res,ServerState *Srv)
{
// Not Modified
if (Srv->Result < 200 || Srv->Result >= 300)
{
_error->Error("%u %s",Srv->Result,Srv->Code);
+ if (Srv->HaveContent == true)
+ return 4;
return 3;
}
delete File;
File = new FileFd(Queue->DestFile,FileFd::WriteAny);
if (_error->PendingError() == true)
- return 3;
-
+ return 5;
+
+ FailFile = Queue->DestFile;
+ FailFile.c_str(); // Make sure we dont do a malloc in the signal handler
+ FailFd = File->Fd();
+ FailTime = Srv->Date;
+
// Set the expected size
if (Srv->StartPos >= 0)
{
if (Srv->In.MD5->AddFD(File->Fd(),Srv->StartPos) == false)
{
_error->Errno("read","Problem hashing file");
- return 3;
+ return 5;
}
lseek(File->Fd(),0,SEEK_END);
}
return 0;
}
/*}}}*/
-// HttpMethod::Loop /*{{{*/
+// 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;
+ bool Tail = false;
+ 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)
+ Tail = true;
+ if (Tail == true)
+ {
+ 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;
+
+ TimeOut = _config->FindI("Acquire::http::Timeout",TimeOut);
+ PipelineDepth = _config->FindI("Acquire::http::Pipeline-Depth",
+ PipelineDepth);
+ Debug = _config->FindB("Debug::Acquire::http",false);
+
+ return true;
+}
+ /*}}}*/
+// HttpMethod::Loop - Main loop /*{{{*/
// ---------------------------------------------------------------------
/* */
int HttpMethod::Loop()
{
- ServerState *Server = 0;
+ 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)
{
return 0;
}
- // Run messages
- if (Run(true) != 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))
return 100;
if (Queue == 0)
Server = new ServerState(Queue->Uri,this);
}
+ // Reset the pipeline
+ if (Server->ServerFd == -1)
+ QueueBack = Queue;
+
// Connnect to the host
if (Server->Open() == false)
{
- Fail();
+ Fail(true);
+ delete Server;
+ Server = 0;
continue;
}
-
- // Queue the request
- SendReq(Queue,Server->In);
- // Handle the header data
- if (Server->RunHeaders() == false)
- {
- Fail();
- continue;
- }
+ // Fill the pipeline.
+ Fetch(0);
+ // Fetch the next URL header data from the server.
+ switch (Server->RunHeaders())
+ {
+ case 0:
+ break;
+
+ // The header data is bad
+ case 2:
+ {
+ _error->Error("Bad header Data");
+ Fail(true);
+ continue;
+ }
+
+ // The server closed a connection during the header get..
+ default:
+ case 1:
+ {
+ FailCounter++;
+ _error->Discard();
+ Server->Close();
+ Server->Pipeline = false;
+
+ if (FailCounter >= 2)
+ {
+ Fail("Connection failed",true);
+ FailCounter = 0;
+ }
+
+ continue;
+ }
+ };
+
// Decide what to do.
FetchResult Res;
+ Res.Filename = Queue->DestFile;
switch (DealWithHeaders(Res,Server))
{
// Ok, the file is Open
URIStart(Res);
// Run the data
- if (Server->RunData() == false)
- Fail();
-
- Res.MD5Sum = Srv->In.MD5->Result();
+ bool Result = Server->RunData();
+
+ // 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.MD5Sum = Server->In.MD5->Result();
+ URIDone(Res);
+ }
+ else
+ Fail(true);
+
break;
}
Fail();
break;
}
+
+ // Hard internal error, kill the connection and fail
+ case 5:
+ {
+ Fail();
+ Server->Close();
+ break;
+ }
+
+ // We need to flush the data, the header is like a 404 w/ error text
+ case 4:
+ {
+ Fail();
+
+ // Send to content to dev/null
+ File = new FileFd("/dev/null",FileFd::WriteExists);
+ Server->RunData();
+ delete File;
+ File = 0;
+ break;
+ }
default:
Fail("Internal error");
break;
- }
+ }
+
+ FailCounter = 0;
}
return 0;
HCoop / ntk / apt.git / blobdiff