// $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
/* ######################################################################
- HTTP Aquire Method - This is the HTTP aquire method for APT.
+ 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.
#include <errno.h>
#include <string.h>
#include <iostream>
+#include <map>
#include <apti18n.h>
// Internet stuff
time_t HttpMethod::FailTime = 0;
unsigned long PipelineDepth = 10;
unsigned long TimeOut = 120;
+bool AllowRedirect = false;
bool Debug = false;
-
+URI Proxy;
unsigned long CircleBuf::BwReadLimit=0;
unsigned long CircleBuf::BwTickReadData=0;
/*}}}*/
// ServerState::RunHeaders - Get the headers before the data /*{{{*/
// ---------------------------------------------------------------------
-/* Returns 0 if things are OK, 1 if an IO error occursed and 2 if a header
- parse error occured */
+/* Returns 0 if things are OK, 1 if an IO error occurred and 2 if a header
+ parse error occurred */
int ServerState::RunHeaders()
{
State = Header;
// Evil servers return no version
if (Line[4] == '/')
{
- if (sscanf(Line.c_str(),"HTTP/%u.%u %u %[^\n]",&Major,&Minor,
+ if (sscanf(Line.c_str(),"HTTP/%u.%u %u%[^\n]",&Major,&Minor,
&Result,Code) != 4)
return _error->Error(_("The HTTP server sent an invalid reply header"));
}
{
Major = 0;
Minor = 9;
- if (sscanf(Line.c_str(),"HTTP %u %[^\n]",&Result,Code) != 2)
+ if (sscanf(Line.c_str(),"HTTP %u%[^\n]",&Result,Code) != 2)
return _error->Error(_("The HTTP server sent an invalid reply header"));
}
return true;
}
+ if (stringcasecmp(Tag,"Location:") == 0)
+ {
+ Location = Val;
+ return true;
+ }
+
return true;
}
/*}}}*/
1 - IMS hit
3 - Unrecoverable error
4 - Error with error content page
- 5 - Unrecoverable non-server error (close the connection) */
+ 5 - Unrecoverable non-server error (close the connection)
+ 6 - Try again with a new or changed URI
+ */
int HttpMethod::DealWithHeaders(FetchResult &Res,ServerState *Srv)
{
// Not Modified
return 1;
}
+ /* 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())
+ {
+ NextURI = Srv->Location;
+ return 6;
+ }
+ /* 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)
if (Srv->StartPos >= 0)
{
Res.ResumePoint = Srv->StartPos;
- ftruncate(File->Fd(),Srv->StartPos);
+ if (ftruncate(File->Fd(),Srv->StartPos) < 0)
+ _error->Errno("ftruncate", _("Failed to truncate file"));
}
// Set the start point
// Queue the requests
int Depth = -1;
- bool Tail = false;
for (FetchItem *I = Queue; I != 0 && Depth < (signed)PipelineDepth;
I = I->Next, Depth++)
{
if (Server->Comp(I->Uri) == false)
break;
if (QueueBack == I)
- Tail = true;
- if (Tail == true)
{
QueueBack = I->Next;
SendReq(I,Server->Out);
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);
/* */
int HttpMethod::Loop()
{
+ typedef vector<string> StringVector;
+ typedef vector<string>::iterator StringVectorIterator;
+ map<string, StringVector> Redirected;
+
signal(SIGTERM,SigTerm);
signal(SIGINT,SigTerm);
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
URIDone(Res);
}
else
- Fail(true);
-
+ {
+ if (Server->ServerFd == -1)
+ {
+ FailCounter++;
+ _error->Discard();
+ Server->Close();
+
+ if (FailCounter >= 2)
+ {
+ Fail(_("Connection failed"),true);
+ FailCounter = 0;
+ }
+
+ QueueBack = Queue;
+ }
+ else
+ Fail(true);
+ }
break;
}
break;
}
+ // Try again with a new URL
+ case 6:
+ {
+ // 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.size() == 0)
+ 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;
int main()
{
setlocale(LC_ALL, "");
+ // ignore SIGPIPE, this can happen on write() if the socket
+ // closes the connection (this is dealt with via ServerDie())
+ signal(SIGPIPE, SIG_IGN);
HttpMethod Mth;
-
return Mth.Loop();
}
projects / apt.git / blobdiff