Sync

Author: jgg
Date: 1998-10-23 00:49:58 GMT
Sync

4 files changed, 221 insertions, 11 deletions

diff --git a/apt-pkg/acquire-worker.cc b/apt-pkg/acquire-worker.cc
index 756b3095..58f67d97 100644
--- a/apt-pkg/acquire-worker.cc
+++ b/apt-pkg/acquire-worker.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: acquire-worker.cc,v 1.4 1998/10/22 04:56:40 jgg Exp $
+// $Id: acquire-worker.cc,v 1.5 1998/10/23 00:49:58 jgg Exp $
 /* ######################################################################
 
    Acquire Worker 
@@ -167,7 +167,6 @@ bool pkgAcquire::Worker::ReadMessages()
    return true;
 }
 									/*}}}*/
-
 // Worker::RunMessage - Empty the message queue				/*{{{*/
 // ---------------------------------------------------------------------
 /* This takes the messages from the message queue and runs them through
diff --git a/apt-pkg/contrib/strutl.cc b/apt-pkg/contrib/strutl.cc
index 04a3c7bb..4882af92 100644
--- a/apt-pkg/contrib/strutl.cc
+++ b/apt-pkg/contrib/strutl.cc
@@ -1,14 +1,16 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: strutl.cc,v 1.6 1998/10/22 04:56:48 jgg Exp $
+// $Id: strutl.cc,v 1.7 1998/10/23 00:49:59 jgg Exp $
 /* ######################################################################
 
    String Util - Some usefull string functions.
 
-   strstrip - Remove whitespace from the front and end of a line.
+   These have been collected from here and there to do all sorts of usefull
+   things to strings. They are usefull in file parsers, URI handlers and
+   especially in APT methods.   
    
    This source is placed in the Public Domain, do with it what you will
-   It was originally written by Jason Gunthorpe <jgg@gpu.srv.ualberta.ca>   
+   It was originally written by Jason Gunthorpe <jgg@gpu.srv.ualberta.ca>
    
    ##################################################################### */
 									/*}}}*/
@@ -195,8 +197,8 @@ string QuoteString(string Str,const char *Bad)
 									/*}}}*/
 // SizeToStr - Convert a long into a human readable size		/*{{{*/
 // ---------------------------------------------------------------------
-/* A max of 4 digits are shown before conversion to the next highest unit. The
-   max length of the string will be 5 chars unless the size is > 10 
+/* A max of 4 digits are shown before conversion to the next highest unit. 
+   The max length of the string will be 5 chars unless the size is > 10
    YottaBytes (E24) */
 string SizeToStr(double Size)
 {
@@ -543,3 +545,77 @@ bool ReadMessages(int Fd, vector<string> &List)
    }   
 }
 									/*}}}*/
+// MonthConv - Converts a month string into a number			/*{{{*/
+// ---------------------------------------------------------------------
+/* This was lifted from the boa webserver which lifted it from 'wn-v1.07'
+   Made it a bit more robust with a few touppers though. */
+static int MonthConv(char *Month)
+{
+   switch (toupper(*Month)) 
+   {
+      case 'A':
+      return toupper(Month[1]) == 'P'?3:7;
+      case 'D':
+      return 11;
+      case 'F':
+      return 1;
+      case 'J':
+      if (toupper(Month[1]) == 'A')
+	 return 0;
+      return toupper(Month[2]) == 'N'?5:6;
+      case 'M':
+      return toupper(Month[2]) == 'R'?2:4;
+      case 'N':
+      return 10;
+      case 'O':
+      return 9;
+      case 'S':
+      return 8;
+
+      // Pretend it is January..
+      default:
+      return 0;
+   }   
+}
+									/*}}}*/
+// StrToTime - Converts a string into a time_t				/*{{{*/
+// ---------------------------------------------------------------------
+/* This handles all 3 populare time formats including RFC 1123, RFC 1036
+   and the C library asctime format. It requires the GNU library function
+   'timegm' to convert a struct tm in UTC to a time_t. For some bizzar
+   reason the C library does not provide any such function :<*/
+bool StrToTime(string Val,time_t &Result)
+{
+   struct tm Tm;
+   char Month[10];
+   const char *I = Val.c_str();
+   
+   // Skip the day of the week
+   for (;*I != 0  && *I != ' '; I++);
+   
+   // Handle RFC 1123 time
+   if (sscanf(I," %d %3s %d %d:%d:%d GMT",&Tm.tm_mday,Month,&Tm.tm_year,
+	      &Tm.tm_hour,&Tm.tm_min,&Tm.tm_sec) != 6)
+   {
+      // Handle RFC 1036 time
+      if (sscanf(I," %d-%3s-%d %d:%d:%d GMT",&Tm.tm_mday,Month,
+		 &Tm.tm_year,&Tm.tm_hour,&Tm.tm_min,&Tm.tm_sec) == 6)
+	 Tm.tm_year += 1900;
+      else
+      {
+	 // asctime format
+	 if (sscanf(I," %3s %d %d:%d:%d %d",Month,&Tm.tm_mday,
+		    &Tm.tm_hour,&Tm.tm_min,&Tm.tm_sec,&Tm.tm_year) != 6)
+	    return false;
+      }
+   }
+   
+   Tm.tm_isdst = 0;
+   Tm.tm_mon = MonthConv(Month);
+   Tm.tm_year -= 1900;
+   
+   // Convert to local time and then to GMT
+   Result = timegm(&Tm);
+   return true;
+}
+									/*}}}*/
diff --git a/apt-pkg/contrib/strutl.h b/apt-pkg/contrib/strutl.h
index fca36fc3..1de2437b 100644
--- a/apt-pkg/contrib/strutl.h
+++ b/apt-pkg/contrib/strutl.h
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: strutl.h,v 1.6 1998/10/22 04:56:49 jgg Exp $
+// $Id: strutl.h,v 1.7 1998/10/23 00:50:00 jgg Exp $
 /* ######################################################################
 
    String Util - These are some usefull string functions
@@ -34,6 +34,7 @@ string Base64Encode(string Str);
 string URItoFileName(string URI);
 string URIAccess(string URI);
 string TimeRFC1123(time_t Date);
+bool StrToTime(string Val,time_t &Result);
 string LookupTag(string Message,const char *Tag,const char *Default = 0);
 int StringToBool(string Text,int Default = -1);
 bool ReadMessages(int Fd, vector<string> &List);
diff --git a/methods/file.cc b/methods/file.cc
index 71c56430..fc42c296 100644
--- a/methods/file.cc
+++ b/methods/file.cc
@@ -1,10 +1,144 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: file.cc,v 1.3 1998/10/23 00:50:02 jgg Exp $
+/* ######################################################################
+
+   File URI method for APT
+   
+   This simply checks that the file specified exists, if so the relevent
+   information is returned. If a .gz filename is specified then the file
+   name with .gz removed will also be checked and information about it
+   will be returned in Alt-*
+   
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#include <apt-pkg/fileutl.h>
+#include <strutl.h>
+
+#include <sys/stat.h>
+#include <unistd.h>
 #include <stdio.h>
+									/*}}}*/
+
+// Fail - Generate a failure message					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void Fail(string URI)
+{
+   printf("400 URI Failure\n"
+	  "URI: %s\n"
+	  "Message: File does not exist\n\n",URI.c_str());
+}
+									/*}}}*/
 
 int main()
 {
+   setlinebuf(stdout);
+   SetNonBlock(STDIN_FILENO,true);
+   
    printf("100 Capabilities\n"
 	  "Version: 1.0\n"
-	  "Pre-Scan: true\n\n");
-   fflush(stdout);
-   sleep(10);
+	  "Pipeline: true\n\n");
+      
+   vector<string> Messages;   
+   while (1)
+   {
+      if (WaitFd(STDIN_FILENO) == false ||
+	  ReadMessages(STDIN_FILENO,Messages) == false)
+	 return 0;
+
+      while (Messages.empty() == false)
+      {
+	 string Message = Messages.front();
+	 Messages.erase(Messages.begin());
+	 
+	 // Fetch the message number
+	 char *End;
+	 int Number = strtol(Message.c_str(),&End,10);
+	 if (End == Message.c_str())
+	 {
+	    cerr << "Malformed message!" << endl;
+	    return 100;
+	 }
+	 
+	 // We only understand 600 URI Fetch messages
+	 if (Number != 600)
+	    continue;
+	 
+	 // Grab the URI bit 
+	 string URI = LookupTag(Message,"URI");
+	 
+	 // Grab the filename
+	 string::size_type Pos = URI.find(':');
+	 if (Pos == string::npos)
+	 {
+	    Fail(URI);
+	    continue;
+	 }
+	 string File = string(URI,Pos+1);
+	 
+	 // Grab the modification time
+	 time_t LastMod;
+	 string LTime = LookupTag(Message,"Last-Modified");
+	 if (LTime.empty() == false && StrToTime(LTime,LastMod) == false)
+	    LTime = string();
+	 
+	 // Start the reply message
+	 string Result = "201 URI Done";
+	 Result += "\nURI: " + URI;
+
+	 // See if the file exists
+	 struct stat Buf;
+	 bool Ok = false;
+	 if (stat(File.c_str(),&Buf) == 0)
+	 {
+	    char S[300];
+	    sprintf(S,"\nSize: %ld",Buf.st_size);
+	    
+	    Result += "\nFilename: " + File;
+	    Result += S;
+	    Result += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
+	    if (LTime.empty() == false && LastMod == Buf.st_mtime)
+	       Result += "\nIMS-Hit: true";
+		
+	    Ok = true;
+	 }
+	 
+	 // See if we can compute a file without a .gz exentsion
+	 Pos = File.rfind(".gz");
+	 if (Pos + 3 == File.length())
+	 {
+	    File = string(File,0,Pos);
+	    if (stat(File.c_str(),&Buf) == 0)
+	    {
+	       char S[300];
+	       sprintf(S,"\nAlt-Size: %ld",Buf.st_size);
+	       
+	       Result += "\nAlt-Filename: " + File;
+	       Result += S;
+	       Result += "\nAlt-Last-Modified: " + TimeRFC1123(Buf.st_mtime);
+	       if (LTime.empty() == false && LastMod == Buf.st_mtime)
+		  Result += "\nAlt-IMS-Hit: true";
+	       
+	       Ok = true;
+	    }
+	 }
+	 
+	 // Did we find something?
+	 if (Ok == false)
+	 {
+	    Fail(URI);
+	    continue;
+	 }
+	 Result += "\n\n";
+	 
+	 // Send the message
+	 if (write(STDOUT_FILENO,Result.begin(),Result.length()) != 
+	     (signed)Result.length())
+	    return 100;
+      }      
+   }
+   
+   return 0;
 }