* debian/apt.cron.daily:

[apt.git] / methods / http.cc

diff --git a/methods/http.cc b/methods/http.cc
index d4e231fbe59ba618a81c3c5521c264a346f58f8c..3f13be05064106dea0758b1427ca7bb9facca2af 100644 (file)
--- a/methods/http.cc
+++ b/methods/http.cc
@@ -39,6 +39,7 @@
 #include <errno.h>
 #include <string.h>
 #include <iostream>
+#include <map>
 #include <apti18n.h>
 
 // Internet stuff
@@ -57,6 +58,7 @@ int HttpMethod::FailFd = -1;
 time_t HttpMethod::FailTime = 0;
 unsigned long PipelineDepth = 10;
 unsigned long TimeOut = 120;
+bool AllowRedirect = false;
 bool Debug = false;
 URI Proxy;
 
@@ -368,8 +370,8 @@ bool ServerState::Close()
                                                                        /*}}}*/
 // 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;
@@ -628,6 +630,12 @@ bool ServerState::HeaderLine(string Line)
       return true;
    }
 
+   if (stringcasecmp(Tag,"Location:") == 0)
+   {
+      Location = Val;
+      return true;
+   }
+
    return true;
 }
                                                                        /*}}}*/
@@ -715,7 +723,7 @@ void HttpMethod::SendReq(FetchItem *Itm,CircleBuf &Out)
       Req += string("Authorization: Basic ") + 
           Base64Encode(Uri.User + ":" + Uri.Password) + "\r\n";
    
-   Req += "User-Agent: Debian APT-HTTP/1.3 ("VERSION")\r\n\r\n";
+   Req += "User-Agent: Ubuntu APT-HTTP/1.3 ("VERSION")\r\n\r\n";
    
    if (Debug == true)
       cerr << Req << endl;
@@ -900,7 +908,9 @@ bool HttpMethod::ServerDie(ServerState *Srv)
      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
@@ -912,10 +922,34 @@ int HttpMethod::DealWithHeaders(FetchResult &Res,ServerState *Srv)
       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)
    {
+      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 4;
@@ -941,7 +975,8 @@ int HttpMethod::DealWithHeaders(FetchResult &Res,ServerState *Srv)
    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
@@ -991,7 +1026,7 @@ void HttpMethod::SigTerm(int)
    depth. */
 bool HttpMethod::Fetch(FetchItem *)
 {
-   if (Server == 0)
+   if (Server == 0) 
       return true;
 
    // Queue the requests
@@ -1025,6 +1060,7 @@ 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);
@@ -1038,6 +1074,10 @@ bool HttpMethod::Configuration(string Message)
 /* */
 int HttpMethod::Loop()
 {
+   typedef vector<string> StringVector;
+   typedef vector<string>::iterator StringVectorIterator;
+   map<string, StringVector> Redirected;
+
    signal(SIGTERM,SigTerm);
    signal(SIGINT,SigTerm);
    
@@ -1224,6 +1264,46 @@ int HttpMethod::Loop()
            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;
@@ -1236,13 +1316,5 @@ int HttpMethod::Loop()
 }
                                                                        /*}}}*/
 
-int main()
-{
-   setlocale(LC_ALL, "");
-
-   HttpMethod Mth;
-   
-   return Mth.Loop();
-}