1 files changed, 133 insertions, 0 deletions
diff --git a/methods/file.cc b/methods/file.cc
new file mode 100644
index 0000000..b2fe133
--- /dev/null
+++ b/methods/file.cc
@@ -0,0 +1,133 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* ######################################################################
+
+   File URI method for APT
+   
+   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-*
+   
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include "aptmethod.h"
+#include <apt-pkg/aptconfiguration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/hashes.h>
+#include <apt-pkg/strutl.h>
+
+#include <string>
+#include <sys/stat.h>
+
+#include <apti18n.h>
+									/*}}}*/
+
+class FileMethod : public aptMethod
+{
+   virtual bool Fetch(FetchItem *Itm) APT_OVERRIDE;
+
+   public:
+   FileMethod() : aptMethod("file", "1.0", SingleInstance | SendConfig | LocalOnly | SendURIEncoded)
+   {
+      SeccompFlags = aptMethod::BASE;
+   }
+};
+
+// FileMethod::Fetch - Fetch a file					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool FileMethod::Fetch(FetchItem *Itm)
+{
+   URI Get(Itm->Uri);
+   std::string const File = DecodeSendURI(Get.Path);
+   FetchResult Res;
+   if (Get.Host.empty() == false)
+      return _error->Error(_("Invalid URI, local URIS must not start with //"));
+
+   struct stat Buf;
+   // deal with destination files which might linger around
+   if (lstat(Itm->DestFile.c_str(), &Buf) == 0)
+   {
+      if ((Buf.st_mode & S_IFREG) != 0)
+      {
+	 if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
+	 {
+	    if (Itm->ExpectedHashes.VerifyFile(File))
+	    {
+	       Res.Filename = Itm->DestFile;
+	       Res.IMSHit = true;
+	    }
+	 }
+      }
+   }
+   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)
+	 {
+	    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;
+	 }
+	 // no break here as we could have situations similar to '.gz' vs '.tar.gz' here
+      }
+   }
+
+   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()
+{
+   return FileMethod().Run();
+}