Introduce support for the Enhances field. (Closes: #137583)

[apt.git] / apt-pkg / acquire-method.cc

diff --git a/apt-pkg/acquire-method.cc b/apt-pkg/acquire-method.cc
index bd7dd6779c476733b744b82e00398b9d0625bc9a..acf1156dcd75162187314d385d1b0524bb94ec9a 100644 (file)
--- a/apt-pkg/acquire-method.cc
+++ b/apt-pkg/acquire-method.cc
@@ -1,25 +1,36 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/

-// $Id: acquire-method.cc,v 1.1 1998/10/30 07:53:35 jgg Exp $
+// $Id: acquire-method.cc,v 1.27.2.1 2003/12/24 23:09:17 mdz Exp $

 /* ######################################################################
 
    Acquire Method
 
 /* ######################################################################
 
    Acquire Method
 

+   This is a skeleton class that implements most of the functionality
+   of a method and some useful functions to make method implementation
+   simpler. The methods all derive this and specialize it. The most
+   complex implementation is the http method which needs to provide
+   pipelining, it runs the message engine at the same time it is 
+   downloading files..
+   

    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/

-#ifdef __GNUG__
-#pragma implementation "apt-pkg/acquire-method.h"
-#endif

 #include <apt-pkg/acquire-method.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/acquire-method.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>

-#include <strutl.h>
+#include <apt-pkg/strutl.h>

 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/fileutl.h>

+#include <apt-pkg/hashes.h>

 
 

+#include <iostream>
+#include <stdarg.h>

 #include <stdio.h>
 #include <stdio.h>

+#include <unistd.h>
+#include <sys/signal.h>

                                                                        /*}}}*/
 
                                                                        /*}}}*/
 

+using namespace std;
+

 // AcqMethod::pkgAcqMethod - Constructor                               /*{{{*/
 // ---------------------------------------------------------------------
 /* This constructs the initialization text */
 // AcqMethod::pkgAcqMethod - Constructor                               /*{{{*/
 // ---------------------------------------------------------------------
 /* This constructs the initialization text */


@@ -33,41 +44,82 @@ pkgAcqMethod::pkgAcqMethod(const char *Ver,unsigned long Flags)
    if ((Flags & SingleInstance) == SingleInstance)
       strcat(End,"Single-Instance: true\n");
    
    if ((Flags & SingleInstance) == SingleInstance)
       strcat(End,"Single-Instance: true\n");
    

-   if ((Flags & PreScan) == PreScan)
-      strcat(End,"Pre-Scan: true\n");
-   

    if ((Flags & Pipeline) == Pipeline)
       strcat(End,"Pipeline: true\n");
    
    if ((Flags & SendConfig) == SendConfig)
       strcat(End,"Send-Config: true\n");
    if ((Flags & Pipeline) == Pipeline)
       strcat(End,"Pipeline: true\n");
    
    if ((Flags & SendConfig) == SendConfig)
       strcat(End,"Send-Config: true\n");

+
+   if ((Flags & LocalOnly) == LocalOnly)
+      strcat(End,"Local-Only: true\n");
+
+   if ((Flags & NeedsCleanup) == NeedsCleanup)
+      strcat(End,"Needs-Cleanup: true\n");
+
+   if ((Flags & Removable) == Removable)
+      strcat(End,"Removable: true\n");

    strcat(End,"\n");
 
    if (write(STDOUT_FILENO,S,strlen(S)) != (signed)strlen(S))
       exit(100);
    strcat(End,"\n");
 
    if (write(STDOUT_FILENO,S,strlen(S)) != (signed)strlen(S))
       exit(100);

+
+   SetNonBlock(STDIN_FILENO,true);
+
+   Queue = 0;
+   QueueBack = 0;

 }
                                                                        /*}}}*/
 // AcqMethod::Fail - A fetch has failed                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 }
                                                                        /*}}}*/
 // AcqMethod::Fail - A fetch has failed                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-void pkgAcqMethod::Fail()
+void pkgAcqMethod::Fail(bool Transient)

 {
    string Err = "Undetermined Error";
    if (_error->empty() == false)
       _error->PopMessage(Err);   
    _error->Discard();
 {
    string Err = "Undetermined Error";
    if (_error->empty() == false)
       _error->PopMessage(Err);   
    _error->Discard();

-   Fail(Err);
+   Fail(Err,Transient);

 }
                                                                        /*}}}*/
 // AcqMethod::Fail - A fetch has failed                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 }
                                                                        /*}}}*/
 // AcqMethod::Fail - A fetch has failed                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-void pkgAcqMethod::Fail(string Err)
-{   
+void pkgAcqMethod::Fail(string Err,bool Transient)
+{
+   // Strip out junk from the error messages
+   for (string::iterator I = Err.begin(); I != Err.end(); I++)
+   {
+      if (*I == '\r') 
+        *I = ' ';
+      if (*I == '\n') 
+        *I = ' ';
+   }
+   

    char S[1024];
    char S[1024];

-   snprintf(S,sizeof(S),"400 URI Failure\nURI: %s\n"
-           "Message %s\n\n",CurrentURI.c_str(),Err.c_str());
+   if (Queue != 0)
+   {
+      snprintf(S,sizeof(S)-50,"400 URI Failure\nURI: %s\n"
+              "Message: %s %s\n",Queue->Uri.c_str(),Err.c_str(),
+              FailExtra.c_str());

 
 

+      // Dequeue
+      FetchItem *Tmp = Queue;
+      Queue = Queue->Next;
+      delete Tmp;
+      if (Tmp == QueueBack)
+        QueueBack = Queue;
+   }
+   else
+      snprintf(S,sizeof(S)-50,"400 URI Failure\nURI: <UNKNOWN>\n"
+              "Message: %s %s\n",Err.c_str(),
+              FailExtra.c_str());
+      
+   // Set the transient flag 
+   if (Transient == true)
+      strcat(S,"Transient-Failure: true\n\n");
+   else
+      strcat(S,"\n");
+   

    if (write(STDOUT_FILENO,S,strlen(S)) != (signed)strlen(S))
       exit(100);
 }
    if (write(STDOUT_FILENO,S,strlen(S)) != (signed)strlen(S))
       exit(100);
 }


@@ -75,22 +127,25 @@ void pkgAcqMethod::Fail(string Err)
 // AcqMethod::URIStart - Indicate a download is starting               /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // AcqMethod::URIStart - Indicate a download is starting               /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-void pkgAcqMethod::URIStart(FetchResult &Res,unsigned long Resume = 0)
+void pkgAcqMethod::URIStart(FetchResult &Res)

 {
 {

+   if (Queue == 0)
+      abort();
+   

    char S[1024] = "";
    char *End = S;
    
    char S[1024] = "";
    char *End = S;
    

-   End += snprintf(S,sizeof(S),"200 URI Start\nURI: %s\n",CurrentURI.c_str());
+   End += snprintf(S,sizeof(S),"200 URI Start\nURI: %s\n",Queue->Uri.c_str());

    if (Res.Size != 0)
    if (Res.Size != 0)

-      End += snprintf(End,sizeof(S) - (End - S),"Size: %u\n",Res.Size);
+      End += snprintf(End,sizeof(S)-4 - (End - S),"Size: %lu\n",Res.Size);

    
    if (Res.LastModified != 0)
    
    if (Res.LastModified != 0)

-      End += snprintf(End,sizeof(S) - (End - S),"Last-Modified: %s\n",
+      End += snprintf(End,sizeof(S)-4 - (End - S),"Last-Modified: %s\n",

                      TimeRFC1123(Res.LastModified).c_str());
    
                      TimeRFC1123(Res.LastModified).c_str());
    

-   if (Resume != 0)
-      End += snprintf(End,sizeof(S) - (End - S),"Resume-Point: %u\n",
-                     Resume);
+   if (Res.ResumePoint != 0)
+      End += snprintf(End,sizeof(S)-4 - (End - S),"Resume-Point: %lu\n",
+                     Res.ResumePoint);

       
    strcat(End,"\n");
    if (write(STDOUT_FILENO,S,strlen(S)) != (signed)strlen(S))
       
    strcat(End,"\n");
    if (write(STDOUT_FILENO,S,strlen(S)) != (signed)strlen(S))


@@ -102,23 +157,42 @@ void pkgAcqMethod::URIStart(FetchResult &Res,unsigned long Resume = 0)
 /* */
 void pkgAcqMethod::URIDone(FetchResult &Res, FetchResult *Alt)
 {
 /* */
 void pkgAcqMethod::URIDone(FetchResult &Res, FetchResult *Alt)
 {

+   if (Queue == 0)
+      abort();
+   

    char S[1024] = "";
    char *End = S;
    
    char S[1024] = "";
    char *End = S;
    

-   End += snprintf(S,sizeof(S),"201 URI Done\nURI: %s\n",CurrentURI.c_str());
+   End += snprintf(S,sizeof(S),"201 URI Done\nURI: %s\n",Queue->Uri.c_str());

 
    if (Res.Filename.empty() == false)
 
    if (Res.Filename.empty() == false)

-      End += snprintf(End,sizeof(S) - (End - S),"Filename: %s\n",Res.Filename.c_str());
+      End += snprintf(End,sizeof(S)-50 - (End - S),"Filename: %s\n",Res.Filename.c_str());

    
    if (Res.Size != 0)
    
    if (Res.Size != 0)

-      End += snprintf(End,sizeof(S) - (End - S),"Size: %u\n",Res.Size);
+      End += snprintf(End,sizeof(S)-50 - (End - S),"Size: %lu\n",Res.Size);

    
    if (Res.LastModified != 0)
    
    if (Res.LastModified != 0)

-      End += snprintf(End,sizeof(S) - (End - S),"Last-Modified: %s\n",
+      End += snprintf(End,sizeof(S)-50 - (End - S),"Last-Modified: %s\n",

                      TimeRFC1123(Res.LastModified).c_str());
 
    if (Res.MD5Sum.empty() == false)
                      TimeRFC1123(Res.LastModified).c_str());
 
    if (Res.MD5Sum.empty() == false)

-      End += snprintf(End,sizeof(S) - (End - S),"MD5Sum: %s\n",Res.MD5Sum.c_str());
+   {
+      End += snprintf(End,sizeof(S)-50 - (End - S),"MD5-Hash: %s\n",Res.MD5Sum.c_str());
+      End += snprintf(End,sizeof(S)-50 - (End - S),"MD5Sum-Hash: %s\n",Res.MD5Sum.c_str());
+   }
+   if (Res.SHA1Sum.empty() == false)
+      End += snprintf(End,sizeof(S)-50 - (End - S),"SHA1-Hash: %s\n",Res.SHA1Sum.c_str());
+   if (Res.SHA256Sum.empty() == false)
+      End += snprintf(End,sizeof(S)-50 - (End - S),"SHA256-Hash: %s\n",Res.SHA256Sum.c_str());
+   if (Res.GPGVOutput.size() > 0)
+      End += snprintf(End,sizeof(S)-50 - (End - S),"GPGVOutput:\n");     
+   for (vector<string>::iterator I = Res.GPGVOutput.begin();
+      I != Res.GPGVOutput.end(); I++)
+      End += snprintf(End,sizeof(S)-50 - (End - S), " %s\n", (*I).c_str());
+
+   if (Res.ResumePoint != 0)
+      End += snprintf(End,sizeof(S)-50 - (End - S),"Resume-Point: %lu\n",
+                     Res.ResumePoint);

 
    if (Res.IMSHit == true)
       strcat(End,"IMS-Hit: true\n");
 
    if (Res.IMSHit == true)
       strcat(End,"IMS-Hit: true\n");


@@ -127,18 +201,24 @@ void pkgAcqMethod::URIDone(FetchResult &Res, FetchResult *Alt)
    if (Alt != 0)
    {
       if (Alt->Filename.empty() == false)
    if (Alt != 0)
    {
       if (Alt->Filename.empty() == false)

-        End += snprintf(End,sizeof(S) - (End - S),"Alt-Filename: %s\n",Alt->Filename.c_str());
+        End += snprintf(End,sizeof(S)-50 - (End - S),"Alt-Filename: %s\n",Alt->Filename.c_str());

       
       if (Alt->Size != 0)
       
       if (Alt->Size != 0)

-        End += snprintf(End,sizeof(S) - (End - S),"Alt-Size: %u\n",Alt->Size);
+        End += snprintf(End,sizeof(S)-50 - (End - S),"Alt-Size: %lu\n",Alt->Size);

       
       if (Alt->LastModified != 0)
       
       if (Alt->LastModified != 0)

-        End += snprintf(End,sizeof(S) - (End - S),"Alt-Last-Modified: %s\n",
+        End += snprintf(End,sizeof(S)-50 - (End - S),"Alt-Last-Modified: %s\n",

                         TimeRFC1123(Alt->LastModified).c_str());
       
       if (Alt->MD5Sum.empty() == false)
                         TimeRFC1123(Alt->LastModified).c_str());
       
       if (Alt->MD5Sum.empty() == false)

-        End += snprintf(End,sizeof(S) - (End - S),"Alt-MD5Sum: %s\n",
+        End += snprintf(End,sizeof(S)-50 - (End - S),"Alt-MD5-Hash: %s\n",

                         Alt->MD5Sum.c_str());
                         Alt->MD5Sum.c_str());

+      if (Alt->SHA1Sum.empty() == false)
+        End += snprintf(End,sizeof(S)-50 - (End - S),"Alt-SHA1-Hash: %s\n",
+                        Alt->SHA1Sum.c_str());
+      if (Alt->SHA256Sum.empty() == false)
+        End += snprintf(End,sizeof(S)-50 - (End - S),"Alt-SHA256-Hash: %s\n",
+                        Alt->SHA256Sum.c_str());

       
       if (Alt->IMSHit == true)
         strcat(End,"Alt-IMS-Hit: true\n");
       
       if (Alt->IMSHit == true)
         strcat(End,"Alt-IMS-Hit: true\n");


@@ -147,6 +227,66 @@ void pkgAcqMethod::URIDone(FetchResult &Res, FetchResult *Alt)
    strcat(End,"\n");
    if (write(STDOUT_FILENO,S,strlen(S)) != (signed)strlen(S))
       exit(100);
    strcat(End,"\n");
    if (write(STDOUT_FILENO,S,strlen(S)) != (signed)strlen(S))
       exit(100);

+
+   // Dequeue
+   FetchItem *Tmp = Queue;
+   Queue = Queue->Next;
+   delete Tmp;
+   if (Tmp == QueueBack)
+      QueueBack = Queue;
+}
+                                                                       /*}}}*/
+// AcqMethod::MediaFail - Syncronous request for new media             /*{{{*/
+// ---------------------------------------------------------------------
+/* This sends a 403 Media Failure message to the APT and waits for it
+   to be ackd */
+bool pkgAcqMethod::MediaFail(string Required,string Drive)
+{
+   char S[1024];
+   snprintf(S,sizeof(S),"403 Media Failure\nMedia: %s\nDrive: %s\n\n",
+           Required.c_str(),Drive.c_str());
+
+   if (write(STDOUT_FILENO,S,strlen(S)) != (signed)strlen(S))
+      exit(100);
+   
+   vector<string> MyMessages;
+   
+   /* Here we read messages until we find a 603, each non 603 message is
+      appended to the main message list for later processing */
+   while (1)
+   {
+      if (WaitFd(STDIN_FILENO) == false)
+        return false;
+      
+      if (ReadMessages(STDIN_FILENO,MyMessages) == false)
+        return false;
+
+      string Message = MyMessages.front();
+      MyMessages.erase(MyMessages.begin());
+      
+      // Fetch the message number
+      char *End;
+      int Number = strtol(Message.c_str(),&End,10);
+      if (End == Message.c_str())
+      {         
+        cerr << "Malformed message!" << endl;
+        exit(100);
+      }
+
+      // Change ack
+      if (Number == 603)
+      {
+        while (MyMessages.empty() == false)
+        {
+           Messages.push_back(MyMessages.front());
+           MyMessages.erase(MyMessages.begin());
+        }
+
+        return !StringToBool(LookupTag(Message,"Failed"),false);
+      }
+      
+      Messages.push_back(Message);
+   }   

 }
                                                                        /*}}}*/
 // AcqMethod::Configuration - Handle the configuration message         /*{{{*/
 }
                                                                        /*}}}*/
 // AcqMethod::Configuration - Handle the configuration message         /*{{{*/


@@ -157,10 +297,11 @@ bool pkgAcqMethod::Configuration(string Message)
 {
    ::Configuration &Cnf = *_config;
    
 {
    ::Configuration &Cnf = *_config;
    

-   const char *I = Message.begin();
+   const char *I = Message.c_str();
+   const char *MsgEnd = I + Message.length();

    
    unsigned int Length = strlen("Config-Item");
    
    unsigned int Length = strlen("Config-Item");

-   for (; I + Length < Message.end(); I++)
+   for (; I + Length < MsgEnd; I++)

    {
       // Not a config item
       if (I[Length] != ':' || stringcasecmp(I,I+Length,"Config-Item") != 0)
    {
       // Not a config item
       if (I[Length] != ':' || stringcasecmp(I,I+Length,"Config-Item") != 0)


@@ -168,15 +309,16 @@ bool pkgAcqMethod::Configuration(string Message)
       
       I += Length + 1;
       
       
       I += Length + 1;
       

-      for (; I < Message.end() && *I == ' '; I++);
+      for (; I < MsgEnd && *I == ' '; I++);

       const char *Equals = I;
       const char *Equals = I;

-      for (; Equals < Message.end() && *Equals != '='; Equals++);
+      for (; Equals < MsgEnd && *Equals != '='; Equals++);

       const char *End = Equals;
       const char *End = Equals;

-      for (; End < Message.end() && *End != '\n'; End++);
+      for (; End < MsgEnd && *End != '\n'; End++);

       if (End == Equals)
         return false;
       
       if (End == Equals)
         return false;
       

-      Cnf.Set(string(I,Equals-I),string(Equals+1,End-Equals-1));
+      Cnf.Set(DeQuoteString(string(I,Equals-I)),
+             DeQuoteString(string(Equals+1,End-Equals-1)));

       I = End;
    }
    
       I = End;
    }
    


@@ -185,20 +327,27 @@ bool pkgAcqMethod::Configuration(string Message)
                                                                        /*}}}*/
 // AcqMethod::Run - Run the message engine                             /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // AcqMethod::Run - Run the message engine                             /*{{{*/
 // ---------------------------------------------------------------------

-/* */
-int pkgAcqMethod::Run()
+/* Fetch any messages and execute them. In single mode it returns 1 if
+   there are no more available messages - any other result is a 
+   fatal failure code! */
+int pkgAcqMethod::Run(bool Single)

 {
 {

-   SetNonBlock(STDIN_FILENO,true);
-

    while (1)
    {
    while (1)
    {

+      // Block if the message queue is empty

       if (Messages.empty() == true)
       if (Messages.empty() == true)

-        if (WaitFd(STDIN_FILENO) == false)
-           return 0;
+      {
+        if (Single == false)
+           if (WaitFd(STDIN_FILENO) == false)
+              break;
+        if (ReadMessages(STDIN_FILENO,Messages) == false)
+           break;
+      }
+            
+      // Single mode exits if the message queue is empty
+      if (Single == true && Messages.empty() == true)
+        return -1;

       
       

-      if (ReadMessages(STDIN_FILENO,Messages) == false)
-        return 0;
-        

       string Message = Messages.front();
       Messages.erase(Messages.begin());
       
       string Message = Messages.front();
       Messages.erase(Messages.begin());
       


@@ -212,34 +361,140 @@ int pkgAcqMethod::Run()
       }
 
       switch (Number)
       }
 
       switch (Number)

-      {
+      {         

         case 601:
         if (Configuration(Message) == false)
            return 100;
         break;
         
         case 600:
         case 601:
         if (Configuration(Message) == false)
            return 100;
         break;
         
         case 600:

-        {          
-           CurrentURI = LookupTag(Message,"URI");
-           DestFile = LookupTag(Message,"FileName");
-           StrToTime(LookupTag(Message,"Last-Modified"),LastModified);
-                     
-           if (Fetch(Message,CurrentURI) == false)
+        {
+           FetchItem *Tmp = new FetchItem;
+           
+           Tmp->Uri = LookupTag(Message,"URI");
+           Tmp->DestFile = LookupTag(Message,"FileName");
+           if (StrToTime(LookupTag(Message,"Last-Modified"),Tmp->LastModified) == false)
+              Tmp->LastModified = 0;
+           Tmp->IndexFile = StringToBool(LookupTag(Message,"Index-File"),false);
+           Tmp->Next = 0;
+           
+           // Append it to the list
+           FetchItem **I = &Queue;
+           for (; *I != 0; I = &(*I)->Next);
+           *I = Tmp;
+           if (QueueBack == 0)
+              QueueBack = Tmp;
+           
+           // Notify that this item is to be fetched.
+           if (Fetch(Tmp) == false)

               Fail();
               Fail();

+           

            break;                                           
         }   
       }      
    }
 
            break;                                           
         }   
       }      
    }
 

+   Exit();

    return 0;
 }
                                                                        /*}}}*/
    return 0;
 }
                                                                        /*}}}*/

-// AcqMethod::FetchResult::FetchResult - Constructor                   /*{{{*/
+// AcqMethod::Log - Send a log message                                 /*{{{*/

 // ---------------------------------------------------------------------
 /* */
 // ---------------------------------------------------------------------
 /* */

-pkgAcqMethod::FetchResult::FetchResult() : LastModified(0), 
-                                   IMSHit(false), Size(0)
+void pkgAcqMethod::Log(const char *Format,...)

 {
 {

+   string CurrentURI = "<UNKNOWN>";
+   if (Queue != 0)
+      CurrentURI = Queue->Uri;
+   
+   va_list args;
+   va_start(args,Format);
+
+   // sprintf the description
+   char S[1024];
+   unsigned int Len = snprintf(S,sizeof(S)-4,"101 Log\nURI: %s\n"
+                              "Message: ",CurrentURI.c_str());
+
+   vsnprintf(S+Len,sizeof(S)-4-Len,Format,args);
+   strcat(S,"\n\n");
+   
+   if (write(STDOUT_FILENO,S,strlen(S)) != (signed)strlen(S))
+      exit(100);

 }
                                                                        /*}}}*/
 }
                                                                        /*}}}*/

+// AcqMethod::Status - Send a status message                           /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void pkgAcqMethod::Status(const char *Format,...)
+{
+   string CurrentURI = "<UNKNOWN>";
+   if (Queue != 0)
+      CurrentURI = Queue->Uri;
+   
+   va_list args;
+   va_start(args,Format);

 
 

+   // sprintf the description
+   char S[1024];
+   unsigned int Len = snprintf(S,sizeof(S)-4,"102 Status\nURI: %s\n"
+                              "Message: ",CurrentURI.c_str());
+
+   vsnprintf(S+Len,sizeof(S)-4-Len,Format,args);
+   strcat(S,"\n\n");
+   
+   if (write(STDOUT_FILENO,S,strlen(S)) != (signed)strlen(S))
+      exit(100);
+}
+                                                                       /*}}}*/
+
+// AcqMethod::Redirect - Send a redirect message                       /*{{{*/
+// ---------------------------------------------------------------------
+/* This method sends the redirect message and also manipulates the queue
+   to keep the pipeline synchronized. */
+void pkgAcqMethod::Redirect(const string &NewURI)
+{
+   string CurrentURI = "<UNKNOWN>";
+   if (Queue != 0)
+      CurrentURI = Queue->Uri;
+ 
+   char S[1024];
+   snprintf(S, sizeof(S)-50, "103 Redirect\nURI: %s\nNew-URI: %s\n\n",
+         CurrentURI.c_str(), NewURI.c_str());
+
+   if (write(STDOUT_FILENO,S,strlen(S)) != (ssize_t)strlen(S))
+      exit(100);
+
+   // Change the URI for the request.
+   Queue->Uri = NewURI;
+
+   /* To keep the pipeline synchronized, move the current request to
+      the end of the queue, past the end of the current pipeline. */
+   FetchItem *I;
+   for (I = Queue; I->Next != 0; I = I->Next) ;
+   I->Next = Queue;
+   Queue = Queue->Next;
+   I->Next->Next = 0;
+   if (QueueBack == 0)
+      QueueBack = I->Next;
+}
+                                                                        /*}}}*/
+
+// AcqMethod::FetchResult::FetchResult - Constructor                   /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgAcqMethod::FetchResult::FetchResult() : LastModified(0),
+                                   IMSHit(false), Size(0), ResumePoint(0)
+{
+}
+                                                                       /*}}}*/
+// AcqMethod::FetchResult::TakeHashes - Load hashes                    /*{{{*/
+// ---------------------------------------------------------------------
+/* This hides the number of hashes we are supporting from the caller. 
+   It just deals with the hash class. */
+void pkgAcqMethod::FetchResult::TakeHashes(Hashes &Hash)
+{
+   MD5Sum = Hash.MD5.Result();
+   SHA1Sum = Hash.SHA1.Result();
+   SHA256Sum = Hash.SHA256.Result();
+}
+                                                                       /*}}}*/