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#define LOCAL_DEBUG
#include "debug.h"
#include "pkgimport.h"
#include "header.h"
#include "dirwalk.h"
#include "meta.h"
#include "acfg.h"
#include "filereader.h"
#include "dlcon.h"
#include "csmapping.h"
#include <string>
#include <iostream>
#include <fstream>
#include <meta.h>
#include <cstdio>
#include <errno.h>
using namespace std;
#define SCACHEFILE (CACHE_BASE+"_impkeycache")
#define FMTSIG "FMT5"
namespace acng
{
/*
* Algorithm:
*
* Scan the _import directory context and make a dictionary with
* fingerprint(size, cs) -> (path, bUsed, mtime)
* in the ProcessRegular callback function
*
* Parse the vol. files, do work, and mark used file with bUsed
*
*/
/*
inline bool IsIndexDiff(const string & sPath)
{
static tFingerprint fprBuf;
static string sDiffHint(".diff" SZPATHSEP);
tStrPos pos;
return (endsWithSzAr(sPath,".gz") && (sPath.find(sDiffHint) != stmiss || (stmiss != (pos
= sPath.rfind(SZPATHSEP "20")) && sPath.find_first_not_of("0123456789.-", pos + 3)
== sPath.size() - 2)));
}
*/
bool pkgimport::ProcessRegular(const mstring &sPath, const struct stat &stinfo)
{
if(CheckStopSignal()) return false;
if(endsWithSzAr(sPath, ".head"))
return true;
if(sPath.size()<=CACHE_BASE_LEN) // heh?
return false;
if(m_bLookForIFiles)
{
ProgTell();
if(0==sPath.compare(CACHE_BASE_LEN, 1, "_"))
return true; // not for us, also excludes _import
AddIFileCandidate(sPath.substr(CACHE_BASE_LEN));
}
else if(rex::FILE_INVALID != rex::GetFiletype(sPath))
{
// get a fingerprint by checksumming if not already there from the fpr cache
if(m_precachedList.find(sPath)!=m_precachedList.end())
return true; // have that already, somewhere...
for (CSTYPES ctp : { CSTYPE_MD5, CSTYPE_SHA1, CSTYPE_SHA512 } )
{
// get the most likely requested contents id
tFingerprint fpr;
/* if ( (IsIndexDiff(sPath) && fpr.ScanFile(sPath, CSTYPE_SHA1, true))
|| (!IsIndexDiff(sPath) && fpr.ScanFile(sPath, CSTYPE_MD5, false)))
*/
if (!fpr.ScanFile(sPath, ctp, false, nullptr))
{
SendFmt << "<span class=\"ERROR\">Error checking " << sPath << "</span>\n<br>\n";
continue;
}
if (fpr.size < 50)
{
// ultra small files, looking like garbage (gz'ed empfy file, ...)
continue;
}
SendFmt << "<font color=blue>Checked " << sPath << " (" << GetCsName(ctp)
<< " fingerprint created)</font><br>\n";
// add this entry immediately if needed and get its reference
tImpFileInfo & node = m_importMap[fpr];
if (node.sPath.empty())
{ // fresh, just added to the map
node.sPath = sPath;
node.mtime = stinfo.st_mtime;
}
else if (node.sPath != sPath)
{
SendFmt << "<span class=\"WARNING\">Duplicate found, " << sPath << " vs. "
<< node.sPath << ", ignoring new entry.</span>\n<br>\n";
m_importRest.emplace_back(fpr, tImpFileInfo(sPath, stinfo.st_mtime));
}
}
}
else
{
if(m_bVerbose)
SendFmt << "<span class=\"WARNING\">File type unknown, skipping "+sPath << "</span>\n<br>\n";
}
return true;
}
bool LinkOrCopy(const std::string &from, const std::string &to)
{
mkbasedir(to);
//ldbg("Moving " <<from<< " to " << to);
// hardlinks don't work with symlinks properly, create a similar symlink then
struct stat stinfo, toinfo;
if(0==lstat(from.c_str(), &stinfo) && S_ISLNK(stinfo.st_mode))
{
char buf[PATH_MAX+1];
buf[PATH_MAX]=0x0;
if (!realpath(from.c_str(), buf))
return false;
::unlink(to.c_str());
return (0==symlink(buf, to.c_str()));
}
else
{
if(0!=stat(from.c_str(), &stinfo))
return false;
if(0==stat(to.c_str(), &toinfo))
{
// same file, don't care
if(stinfo.st_dev==toinfo.st_dev && stinfo.st_ino == toinfo.st_ino)
return true;
// unlink, this file must go. If that fails, we have weird permissions anyway.
if(0!=unlink(to.c_str()))
return false;
}
if (0==link(from.c_str(), to.c_str()))
return true;
if(!FileCopy(from,to))
return false;
// make sure the copy is ok
return (0 == stat(from.c_str(), &stinfo)
&& 0 == stat(to.c_str(), &toinfo)
&& toinfo.st_size==stinfo.st_size);
}
return false;
}
void pkgimport::Action()
{
// TODO: import path from cmd?
m_sSrcPath=CACHE_BASE+"_import";
SendFmt << "Importing from " << m_sSrcPath << " directory.<br>Scanning local files...<br>";
m_bByPath=true; // should act on all locations
_LoadKeyCache();
if(!m_precachedList.empty())
SendChunk( tSS(100)<<"Loaded "<<m_importMap.size()<<
(m_precachedList.size()==1 ? " entry" : " entries")
<<" from the fingerprint cache<br>\n");
m_bLookForIFiles=true;
BuildCacheFileList();
if(CheckStopSignal()) return;
if(m_metaFilesRel.empty())
{
SendChunk("<span class=\"ERROR\">No index files detected. Unable to continue, cannot map files to internal locations.</span>");
return;
}
UpdateVolatileFiles();
if(CheckStopSignal()) return;
if(m_bErrAbort && m_nErrorCount>0)
{
SendChunk(sAbortMsg);
return;
}
m_bLookForIFiles=false;
DBGQLOG("building contents map for " << m_sSrcPath);
DirectoryWalk(m_sSrcPath, this, true);
if(CheckStopSignal()) return;
if(m_importMap.empty())
{
SendChunk("No appropriate files found in the _import directory.<br>\nDone.<br>\n");
return;
}
ProcessSeenIndexFiles([this](const tRemoteFileInfo &e) {
HandlePkgEntry(e); });
if(CheckStopSignal()) return;
ofstream fList;
fList.open(SCACHEFILE.c_str(), ios::out | ios::trunc);
if(!fList.is_open())
{
unlink(SCACHEFILE.c_str());
fList.open(SCACHEFILE.c_str(), ios::out| ios::trunc);
}
if(!fList.is_open())
SendChunk("Cannot save fingerprint cache, ignored");
else
fList << FMTSIG"\n";
off_t remaining=0;
for(const auto& fpr2info: m_importMap)
{
// delete imported stuff, and cache the fingerprint only when file was deleted
if(fpr2info.second.bFileUsed && 0==unlink(fpr2info.second.sPath.c_str()))
continue;
if(!fList.is_open())
continue;
#define ENDL "\n" // don't flush all the time
fList << fpr2info.first.size << ENDL
<< (int)fpr2info.first.csType << ENDL
<< fpr2info.first.GetCsAsString() << ENDL
<< fpr2info.second.sPath.substr(m_sSrcPath.size()+1) <<ENDL
<< fpr2info.second.mtime <<ENDL;
remaining+=fpr2info.first.size;
}
// deal with the rest, never double-examine that stuff
// copy&paste FTW
for(const auto& fpr2info : m_importRest)
{
fList << fpr2info.first.size << ENDL
<< (int)fpr2info.first.csType << ENDL
<< fpr2info.first.GetCsAsString() << ENDL
<< fpr2info.second.sPath.substr(m_sSrcPath.size()+1) <<ENDL
<< fpr2info.second.mtime <<ENDL;
remaining+=fpr2info.first.size;
}
fList.flush();
fList.close();
PrintStats("Imported data, per target");
int n=(m_importMap.size()+m_importRest.size());
if(n)
SendFmt << "\n<br>" << n << (n==1 ? " file (" : " files (")
<< offttosH(remaining) << ") left behind";
}
void pkgimport::HandlePkgEntry(const tRemoteFileInfo &entry)
{
//typedef std::map<tFingerprint, tImpFileInfo, ltfingerprint> tImportMap;
auto hit = m_importMap.find(entry.fpr);
if (hit==m_importMap.end())
return;
string sDestAbs=CACHE_BASE;
if(cfg::stupidfs)
sDestAbs+=DosEscape(entry.sDirectory+entry.sFileName);
else
sDestAbs+=(entry.sDirectory+entry.sFileName);
string sDestHeadAbs=sDestAbs+".head";
cmstring& sFromAbs=hit->second.sPath;
SendChunk(string("<font color=green>HIT: ")+sFromAbs
+ "<br>\nDESTINATION: "+sDestAbs+"</font><br>\n");
// linking and moving would shred them when the link leads to the same target
struct stat tmp1, tmp2;
if (0==stat(sDestAbs.c_str(), &tmp1) && 0==stat(sFromAbs.c_str(), &tmp2)
&& tmp1.st_ino==tmp2.st_ino&& tmp1.st_dev==tmp2.st_dev)
{
//cerr << "Same target file, ignoring."<<endl;
hit->second.bFileUsed=true;
SendChunk("<span class=\"WARNING\">Same file exists</span><br>\n");
if(0!=access(sDestHeadAbs.c_str(), F_OK))
{
SendChunk("<span class=\"WARNING\">Header is missing, will recreate...</span>\n<br>\n");
goto gen_header;
}
return;
}
unlink(sDestAbs.c_str());
// XXX: maybe use inject instead
if (!LinkOrCopy(sFromAbs, sDestAbs))
{
SendChunk("<span class=\"ERROR\">ERROR: couldn't link or copy file.</span>\n<br>\n");
return;
}
gen_header:
unlink(sDestHeadAbs.c_str());
header h;
h.frontLine="HTTP/1.1 200 OK";
/*
if(entry.fpr.bUnpack)
{
static struct stat stbuf;
if(0!=stat(sFrom.c_str(), &stbuf))
return; // weird...
h.set(header::CONTENT_LENGTH, stbuf.st_size);
}
else
*/
h.set(header::CONTENT_LENGTH, entry.fpr.size);
h.type=header::ANSWER;
if (h.StoreToFile(sDestAbs+".head")<=0)
{
log::err("Unable to store generated header");
return; // junk may remain but that's a job for cleanup later
}
hit->second.bFileUsed=true;
SetFlags(m_processedIfile).space+=entry.fpr.size;
}
void pkgimport::_LoadKeyCache()
{
std::ifstream in;
tImpFileInfo info;
tFingerprint fpr;
in.open(SCACHEFILE.c_str());
string cs;
if(!in.is_open())
return;
std::getline(in, cs);
if(cs!=FMTSIG)
return;
/* if(m_bVerbose)
SendChunk("Loading fingerprints from key cache... \n");
*/
int csType(CSTYPE_INVALID);
for(;;)
{
info.bFileUsed=false;
std::getline(in, cs);
if((fpr.size=atoofft(cs.c_str(), -2)) < 0)
return;
in>>csType;
std::getline(in, cs); // newline
std::getline(in, cs); // checksum line
if(!fpr.SetCs(cs, (CSTYPES)csType))
return;
std::getline(in, info.sPath);
info.sPath.insert(0, m_sSrcPath+SZPATHSEP);
in>>info.mtime;
std::getline(in, cs); // newline
#ifdef DEBUG_FLAGS
bool bNix=(stmiss != info.sPath.find("cabextract"));
#endif
struct stat stbuf;
if(0==stat(info.sPath.c_str(), &stbuf)
&& info.mtime==stbuf.st_mtime)
{
m_importMap[fpr]=info;
m_precachedList.insert(info.sPath);
}
if(in.eof() || in.fail())
break;
}
/*
*
if(m_bVerbose)
SendChunk(ltos(m_importMap.size())+" entries<br>\n");
*/
}
/*
bool pkgimport::ProcessOthers(const mstring& sPath, const struct stat&)
{
if(S_ISLNK())
}
void tFInfo::Dump(FILE *fh, const string & second)
{
fprintf(fh, "%s;%lu;%lu\n%s\n", sPath.c_str(), nSize, nTime, second.c_str());
}
void pkgimport::_GetCachedKey(const string & sPath, const struct stat &stinfo, string &out)
{
char buf[PATH_MAX+5+3*sizeof(unsigned long)];
sprintf(buf, "%s\n%lu\n%lu\n", sPath.c_str(), (unsigned long) stinfo.st_size,
(unsigned long) stinfo.st_mtime);
tStringMap::const_iterator it=m_cacheMap.find(buf);
if(it==m_cacheMap.end())
out.clear();
else
out=it->second;
}
*/
}
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