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Commit	Line	Data
	1	// -- mode: cpp; mode: fold --
	2	// Description /{{{/
	3	// $Id: file.cc,v 1.9.2.1 2004/01/16 18:58:50 mdz Exp $
	4	/* ######################################################################
	5
	6	File URI method for APT
	7
	8	This simply checks that the file specified exists, if so the relevant
	9	information is returned. If a .gz filename is specified then the file
	10	name with .gz removed will also be checked and information about it
	11	will be returned in Alt-*
	12
	13	##################################################################### */
	14	/}}}/
	15	// Include Files /{{{/
	16	#include <config.h>
	17
	18	#include <apt-pkg/acquire-method.h>
	19	#include <apt-pkg/aptconfiguration.h>
	20	#include <apt-pkg/error.h>
	21	#include <apt-pkg/hashes.h>
	22	#include <apt-pkg/fileutl.h>
	23	#include <apt-pkg/strutl.h>
	24
	25	#include <string>
	26	#include <sys/stat.h>
	27
	28	#include <apti18n.h>
	29	/}}}/
	30
	31	class FileMethod : public pkgAcqMethod
	32	{
	33	virtual bool Fetch(FetchItem *Itm) APT_OVERRIDE;
	34
	35	public:
	36
	37	FileMethod() : pkgAcqMethod("1.0",SingleInstance \| SendConfig \| LocalOnly) {};
	38	};
	39
	40	// FileMethod::Fetch - Fetch a file /{{{/
	41	// ---------------------------------------------------------------------
	42	/* */
	43	bool FileMethod::Fetch(FetchItem *Itm)
	44	{
	45	URI Get = Itm->Uri;
	46	std::string File = Get.Path;
	47	FetchResult Res;
	48	if (Get.Host.empty() == false)
	49	return _error->Error(_("Invalid URI, local URIS must not start with //"));
	50
	51	struct stat Buf;
	52	// deal with destination files which might linger around
	53	if (lstat(Itm->DestFile.c_str(), &Buf) == 0)
	54	{
	55	if ((Buf.st_mode & S_IFREG) != 0)
	56	{
	57	if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
	58	{
	59	HashStringList const hsl = Itm->ExpectedHashes;
	60	if (Itm->ExpectedHashes.VerifyFile(File))
	61	{
	62	Res.Filename = Itm->DestFile;
	63	Res.IMSHit = true;
	64	}
	65	}
	66	}
	67	}
	68	if (Res.IMSHit != true)
	69	unlink(Itm->DestFile.c_str());
	70
	71	// See if the file exists
	72	if (stat(File.c_str(),&Buf) == 0)
	73	{
	74	Res.Size = Buf.st_size;
	75	Res.Filename = File;
	76	Res.LastModified = Buf.st_mtime;
	77	Res.IMSHit = false;
	78	if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
	79	{
	80	unsigned long long const filesize = Itm->ExpectedHashes.FileSize();
	81	if (filesize != 0 && filesize == Res.Size)
	82	Res.IMSHit = true;
	83	}
	84
	85	Hashes Hash(Itm->ExpectedHashes);
	86	FileFd Fd(File, FileFd::ReadOnly);
	87	Hash.AddFD(Fd);
	88	Res.TakeHashes(Hash);
	89	}
	90	if (Res.IMSHit == false)
	91	URIStart(Res);
	92
	93	// See if the uncompressed file exists and reuse it
	94	FetchResult AltRes;
	95	AltRes.Filename.clear();
	96	std::vector<std::string> extensions = APT::Configuration::getCompressorExtensions();
	97	for (std::vector<std::string>::const_iterator ext = extensions.begin(); ext != extensions.end(); ++ext)
	98	{
	99	if (APT::String::Endswith(File, *ext) == true)
	100	{
	101	std::string const unfile = File.substr(0, File.length() - ext->length() - 1);
	102	if (stat(unfile.c_str(),&Buf) == 0)
	103	{
	104	AltRes.Size = Buf.st_size;
	105	AltRes.Filename = unfile;
	106	AltRes.LastModified = Buf.st_mtime;
	107	AltRes.IMSHit = false;
	108	if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
	109	AltRes.IMSHit = true;
	110	break;
	111	}
	112	// no break here as we could have situations similar to '.gz' vs '.tar.gz' here
	113	}
	114	}
	115
	116	if (AltRes.Filename.empty() == false)
	117	URIDone(Res,&AltRes);
	118	else if (Res.Filename.empty() == false)
	119	URIDone(Res);
	120	else
	121	return _error->Error(_("File not found"));
	122
	123	return true;
	124	}
	125	/}}}/
	126
	127	int main()
	128	{
	129	setlocale(LC_ALL, "");
	130
	131	FileMethod Mth;
	132	return Mth.Run();
	133	}