respect user pinning in M-A:same version (un)screwing

[apt.git] / methods / file.cc

diff --git a/methods/file.cc b/methods/file.cc
index fc42c296833c154798641ace3ce701eec7d0b201..36f3c39b9b8c2a9fef1fc25893e994f43263d0e6 100644 (file)
--- a/methods/file.cc
+++ b/methods/file.cc
@@ -1,11 +1,11 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/

-// $Id: file.cc,v 1.3 1998/10/23 00:50:02 jgg Exp $
+// $Id: file.cc,v 1.9.2.1 2004/01/16 18:58:50 mdz Exp $

 /* ######################################################################
 
    File URI method for APT
    
 /* ######################################################################
 
    File URI method for APT
    

-   This simply checks that the file specified exists, if so the relevent
+   This simply checks that the file specified exists, if so the relevant

    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-*
    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-*


@@ -13,132 +13,124 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/

+#include <config.h>
+
+#include <apt-pkg/acquire-method.h>
+#include <apt-pkg/aptconfiguration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/hashes.h>

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

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

 
 

+#include <string>

 #include <sys/stat.h>
 #include <sys/stat.h>

-#include <unistd.h>
-#include <stdio.h>
+
+#include <apti18n.h>

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

-// Fail - Generate a failure message                                   /*{{{*/
+class FileMethod : public aptMethod
+{
+   virtual bool Fetch(FetchItem *Itm) APT_OVERRIDE;
+
+   public:
+   FileMethod() : aptMethod("file", "1.0", SingleInstance | SendConfig | LocalOnly) {};
+};
+
+// FileMethod::Fetch - Fetch a file                                    /*{{{*/

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

-void Fail(string URI)
+bool FileMethod::Fetch(FetchItem *Itm)

 {
 {

-   printf("400 URI Failure\n"
-         "URI: %s\n"
-         "Message: File does not exist\n\n",URI.c_str());
-}
-                                                                       /*}}}*/
+   URI Get = Itm->Uri;
+   std::string File = Get.Path;
+   FetchResult Res;
+   if (Get.Host.empty() == false)
+      return _error->Error(_("Invalid URI, local URIS must not start with //"));

 
 

-int main()
-{
-   setlinebuf(stdout);
-   SetNonBlock(STDIN_FILENO,true);
-   
-   printf("100 Capabilities\n"
-         "Version: 1.0\n"
-         "Pipeline: true\n\n");
-      
-   vector<string> Messages;   
-   while (1)
+   struct stat Buf;
+   // deal with destination files which might linger around
+   if (lstat(Itm->DestFile.c_str(), &Buf) == 0)

    {
    {

-      if (WaitFd(STDIN_FILENO) == false ||
-         ReadMessages(STDIN_FILENO,Messages) == false)
-        return 0;
-
-      while (Messages.empty() == false)
+      if ((Buf.st_mode & S_IFREG) != 0)

       {
       {

-        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)
+        if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)

         {
         {

-           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)
+           HashStringList const hsl = Itm->ExpectedHashes;
+           if (Itm->ExpectedHashes.VerifyFile(File))

            {
            {

-              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;
+              Res.Filename = Itm->DestFile;
+              Res.IMSHit = true;

            }
         }
            }
         }

-        
-        // Did we find something?
-        if (Ok == false)
+      }
+   }
+   if (Res.IMSHit != true)
+      RemoveFile("file", Itm->DestFile);
+
+   int olderrno = 0;
+   // See if the file exists
+   if (stat(File.c_str(),&Buf) == 0)
+   {
+      Res.Size = Buf.st_size;
+      Res.Filename = File;
+      Res.LastModified = Buf.st_mtime;
+      Res.IMSHit = false;
+      if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
+      {
+        unsigned long long const filesize = Itm->ExpectedHashes.FileSize();
+        if (filesize != 0 && filesize == Res.Size)
+           Res.IMSHit = true;
+      }
+
+      CalculateHashes(Itm, Res);
+   }
+   else
+      olderrno = errno;
+   if (Res.IMSHit == false)
+      URIStart(Res);
+
+   // See if the uncompressed file exists and reuse it
+   FetchResult AltRes;
+   AltRes.Filename.clear();
+   std::vector<std::string> extensions = APT::Configuration::getCompressorExtensions();
+   for (std::vector<std::string>::const_iterator ext = extensions.begin(); ext != extensions.end(); ++ext)
+   {
+      if (APT::String::Endswith(File, *ext) == true)
+      {
+        std::string const unfile = File.substr(0, File.length() - ext->length());
+        if (stat(unfile.c_str(),&Buf) == 0)

         {
         {

-           Fail(URI);
-           continue;
+           AltRes.Size = Buf.st_size;
+           AltRes.Filename = unfile;
+           AltRes.LastModified = Buf.st_mtime;
+           AltRes.IMSHit = false;
+           if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
+              AltRes.IMSHit = true;
+           break;

         }
         }

-        Result += "\n\n";
-        
-        // Send the message
-        if (write(STDOUT_FILENO,Result.begin(),Result.length()) != 
-            (signed)Result.length())
-           return 100;
-      }      
+        // no break here as we could have situations similar to '.gz' vs '.tar.gz' here
+      }

    }
    }

-   
-   return 0;
+
+   if (AltRes.Filename.empty() == false)
+      URIDone(Res,&AltRes);
+   else if (Res.Filename.empty() == false)
+      URIDone(Res);
+   else
+   {
+      errno = olderrno;
+      return _error->Errno(File.c_str(), _("File not found"));
+   }
+
+   return true;
+}
+                                                                       /*}}}*/
+
+int main()
+{
+   setlocale(LC_ALL, "");
+
+   FileMethod Mth;
+   return Mth.Run();

 }
 }