Merge remote-tracking branch 'upstream/debian/experimental' into feature/acq-trans

[apt.git] / methods / https.cc

diff --git a/methods/https.cc b/methods/https.cc
index d48ac97fb2df5d6d8434ff946ad619a4055b6df2..0499af0c5126bc629bc0ac8b96c8a45ca98bf814 100644 (file)
--- a/methods/https.cc
+++ b/methods/https.cc
@@ -1,155 +1,276 @@
-// -*- mode: cpp; mode: fold -*-
+//-*- mode: cpp; mode: fold -*-

 // Description                                                         /*{{{*/
 // $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
 /* ######################################################################
 
 // Description                                                         /*{{{*/
 // $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
 /* ######################################################################
 

-   HTTPS Acquire Method - This is the HTTPS aquire method for APT.
+   HTTPS Acquire Method - This is the HTTPS acquire method for APT.

    
    It uses libcurl
 
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
    
    It uses libcurl
 
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/

+#include <config.h>
+

 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/acquire-method.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/hashes.h>
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/acquire-method.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/hashes.h>

+#include <apt-pkg/netrc.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/macros.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/proxy.h>

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

-#include <utime.h>

 #include <unistd.h>
 #include <unistd.h>

-#include <signal.h>

 #include <stdio.h>
 #include <stdio.h>

-#include <errno.h>
-#include <string.h>

 #include <iostream>
 #include <iostream>

-#include <apti18n.h>

 #include <sstream>
 #include <sstream>

+#include <ctype.h>
+#include <stdlib.h>

 
 

-#include "config.h"

 #include "https.h"
 
 #include "https.h"
 

+#include <apti18n.h>

                                                                        /*}}}*/
 using namespace std;
 
                                                                        /*}}}*/
 using namespace std;
 

+size_t
+HttpsMethod::parse_header(void *buffer, size_t size, size_t nmemb, void *userp)
+{
+   size_t len = size * nmemb;
+   HttpsMethod *me = (HttpsMethod *)userp;
+   std::string line((char*) buffer, len);
+   for (--len; len > 0; --len)
+      if (isspace(line[len]) == 0)
+      {
+        ++len;
+        break;
+      }
+   line.erase(len);
+
+   if (line.empty() == true)
+   {
+      if (me->Server->Result != 416 && me->Server->StartPos != 0)
+        ;
+      else if (me->Server->Result == 416 && me->Server->Size == me->File->FileSize())
+      {
+         me->Server->Result = 200;
+        me->Server->StartPos = me->Server->Size;
+      }
+      else
+        me->Server->StartPos = 0;
+
+      me->File->Truncate(me->Server->StartPos);
+      me->File->Seek(me->Server->StartPos);
+   }
+   else if (me->Server->HeaderLine(line) == false)
+      return 0;
+
+   return size*nmemb;
+}
+

 size_t 
 HttpsMethod::write_data(void *buffer, size_t size, size_t nmemb, void *userp)
 {
    HttpsMethod *me = (HttpsMethod *)userp;
 
 size_t 
 HttpsMethod::write_data(void *buffer, size_t size, size_t nmemb, void *userp)
 {
    HttpsMethod *me = (HttpsMethod *)userp;
 

+   if (me->Res.Size == 0)
+      me->URIStart(me->Res);

    if(me->File->Write(buffer, size*nmemb) != true)
       return false;
 
    return size*nmemb;
 }
 
    if(me->File->Write(buffer, size*nmemb) != true)
       return false;
 
    return size*nmemb;
 }
 

-int 
-HttpsMethod::progress_callback(void *clientp, double dltotal, double dlnow, 
-                             double ultotal, double ulnow)
+int
+HttpsMethod::progress_callback(void *clientp, double dltotal, double /*dlnow*/,
+                             double /*ultotal*/, double /*ulnow*/)

 {
    HttpsMethod *me = (HttpsMethod *)clientp;
    if(dltotal > 0 && me->Res.Size == 0) {
 {
    HttpsMethod *me = (HttpsMethod *)clientp;
    if(dltotal > 0 && me->Res.Size == 0) {

-      me->Res.Size = (unsigned long)dltotal;
-      me->URIStart(me->Res);
+      me->Res.Size = (unsigned long long)dltotal;

    }
    return 0;
 }
 
    }
    return 0;
 }
 

-void HttpsMethod::SetupProxy()
+// HttpsServerState::HttpsServerState - Constructor                    /*{{{*/
+HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * /*Owner*/) : ServerState(Srv, NULL)
+{
+   TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
+   Reset();
+}
+                                                                       /*}}}*/
+
+void HttpsMethod::SetupProxy()                                         /*{{{*/

 {
    URI ServerName = Queue->Uri;
 
    // Determine the proxy setting
 {
    URI ServerName = Queue->Uri;
 
    // Determine the proxy setting

-   if (getenv("http_proxy") == 0)
-   {
-      string DefProxy = _config->Find("Acquire::http::Proxy");
-      string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
-      if (SpecificProxy.empty() == false)
-      {
-        if (SpecificProxy == "DIRECT")
-           Proxy = "";
-        else
-           Proxy = SpecificProxy;
-      }   
-      else
-        Proxy = DefProxy;
-   }
-   
-   // Parse no_proxy, a , separated list of domains
-   if (getenv("no_proxy") != 0)
+   AutoDetectProxy(ServerName);
+
+   // Curl should never read proxy settings from the environment, as
+   // we determine which proxy to use.  Do this for consistency among
+   // methods and prevent an environment variable overriding a
+   // no-proxy ("DIRECT") setting in apt.conf.
+   curl_easy_setopt(curl, CURLOPT_PROXY, "");
+
+   // Determine the proxy setting - try https first, fallback to http and use env at last
+   string UseProxy = _config->Find("Acquire::https::Proxy::" + ServerName.Host,
+                                  _config->Find("Acquire::http::Proxy::" + ServerName.Host).c_str());
+
+   if (UseProxy.empty() == true)
+      UseProxy = _config->Find("Acquire::https::Proxy", _config->Find("Acquire::http::Proxy").c_str());
+
+   // User want to use NO proxy, so nothing to setup
+   if (UseProxy == "DIRECT")
+      return;
+
+   if (UseProxy.empty() == false) 

    {
    {

-      if (CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
-        Proxy = "";
+      // Parse no_proxy, a comma (,) separated list of domains we don't want to use
+      // a proxy for so we stop right here if it is in the list
+      if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
+        return;
+   } else {
+      const char* result = getenv("https_proxy");
+      // FIXME: Fall back to http_proxy is to remain compatible with
+      // existing setups and behaviour of apt.conf.  This should be
+      // deprecated in the future (including apt.conf).  Most other
+      // programs do not fall back to http proxy settings and neither
+      // should Apt.
+      if (result == NULL)
+         result = getenv("http_proxy");
+      UseProxy = result == NULL ? "" : result;

    }
    }

-   
+

    // Determine what host and port to use based on the proxy settings
    // Determine what host and port to use based on the proxy settings

-   string Host;   
-   if (Proxy.empty() == true || Proxy.Host.empty() == true)
+   if (UseProxy.empty() == false) 

    {
    {

-   }
-   else
-   {
-      if (Proxy.Port != 0)
+      Proxy = UseProxy;
+      if (Proxy.Port != 1)

         curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
       curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
         curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
       curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());

+      if (Proxy.User.empty() == false || Proxy.Password.empty() == false)
+      {
+         curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, Proxy.User.c_str());
+         curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, Proxy.Password.c_str());
+      }

    }
    }

-}
-
-
+}                                                                      /*}}}*/

 // HttpsMethod::Fetch - Fetch an item                                  /*{{{*/
 // ---------------------------------------------------------------------
 /* This adds an item to the pipeline. We keep the pipeline at a fixed
    depth. */
 bool HttpsMethod::Fetch(FetchItem *Itm)
 {
 // HttpsMethod::Fetch - Fetch an item                                  /*{{{*/
 // ---------------------------------------------------------------------
 /* This adds an item to the pipeline. We keep the pipeline at a fixed
    depth. */
 bool HttpsMethod::Fetch(FetchItem *Itm)
 {

-   stringstream ss;

    struct stat SBuf;
    struct curl_slist *headers=NULL;  
    char curl_errorstr[CURL_ERROR_SIZE];
    struct stat SBuf;
    struct curl_slist *headers=NULL;  
    char curl_errorstr[CURL_ERROR_SIZE];

+   URI Uri = Itm->Uri;
+   string remotehost = Uri.Host;

 
    // TODO:
 
    // TODO:

-   //       - http::Timeout

    //       - http::Pipeline-Depth
    //       - error checking/reporting
    //       - more debug options? (CURLOPT_DEBUGFUNCTION?)
 
    //       - http::Pipeline-Depth
    //       - error checking/reporting
    //       - more debug options? (CURLOPT_DEBUGFUNCTION?)
 

+   curl_easy_reset(curl);

    SetupProxy();
 
    SetupProxy();
 

+   maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
+

    // callbacks
    // callbacks

-   curl_easy_setopt(curl, CURLOPT_URL, Itm->Uri.c_str());
+   curl_easy_setopt(curl, CURLOPT_URL, static_cast<string>(Uri).c_str());
+   curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, parse_header);
+   curl_easy_setopt(curl, CURLOPT_WRITEHEADER, this);

    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
    curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
    curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
    curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
    curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);

+   // options

    curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
    curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);

-   curl_easy_setopt(curl, CURLOPT_FAILONERROR, true);
-
-   // FIXME: https: offer various options of verification
-   bool peer_verify = _config->FindB("Acquire::https::Verify-Peer", false);
+   curl_easy_setopt(curl, CURLOPT_FILETIME, true);
+   // only allow curl to handle https, not the other stuff it supports
+   curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
+   curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
+
+   // SSL parameters are set by default to the common (non mirror-specific) value
+   // if available (or a default one) and gets overload by mirror-specific ones.
+
+   // File containing the list of trusted CA.
+   string cainfo = _config->Find("Acquire::https::CaInfo","");
+   string knob = "Acquire::https::"+remotehost+"::CaInfo";
+   cainfo = _config->Find(knob.c_str(),cainfo.c_str());
+   if(cainfo.empty() == false)
+      curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());
+
+   // Check server certificate against previous CA list ...
+   bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
+   knob = "Acquire::https::" + remotehost + "::Verify-Peer";
+   peer_verify = _config->FindB(knob.c_str(), peer_verify);

    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
 
    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
 

-   // sslcert file
+   // ... and hostname against cert CN or subjectAltName
+   bool verify = _config->FindB("Acquire::https::Verify-Host",true);
+   knob = "Acquire::https::"+remotehost+"::Verify-Host";
+   verify = _config->FindB(knob.c_str(),verify);
+   int const default_verify = (verify == true) ? 2 : 0;
+   curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, default_verify);
+
+   // Also enforce issuer of server certificate using its cert
+   string issuercert = _config->Find("Acquire::https::IssuerCert","");
+   knob = "Acquire::https::"+remotehost+"::IssuerCert";
+   issuercert = _config->Find(knob.c_str(),issuercert.c_str());
+   if(issuercert.empty() == false)
+      curl_easy_setopt(curl, CURLOPT_ISSUERCERT,issuercert.c_str());
+
+   // For client authentication, certificate file ...

    string pem = _config->Find("Acquire::https::SslCert","");
    string pem = _config->Find("Acquire::https::SslCert","");

-   if(pem != "")
+   knob = "Acquire::https::"+remotehost+"::SslCert";
+   pem = _config->Find(knob.c_str(),pem.c_str());
+   if(pem.empty() == false)

       curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
       curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());

-   
-   // CA-Dir
-   string certdir = _config->Find("Acquire::https::CaPath","");
-   if(certdir != "")
-      curl_easy_setopt(curl, CURLOPT_CAPATH, certdir.c_str());
-   
-   // Server-verify 
-   int verify = _config->FindI("Acquire::https::Verify-Host",2);
-   curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, verify);
+
+   // ... and associated key.
+   string key = _config->Find("Acquire::https::SslKey","");
+   knob = "Acquire::https::"+remotehost+"::SslKey";
+   key = _config->Find(knob.c_str(),key.c_str());
+   if(key.empty() == false)
+      curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());
+
+   // Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
+   // supported by GnuTLS).
+   long final_version = CURL_SSLVERSION_DEFAULT;
+   string sslversion = _config->Find("Acquire::https::SslForceVersion","");
+   knob = "Acquire::https::"+remotehost+"::SslForceVersion";
+   sslversion = _config->Find(knob.c_str(),sslversion.c_str());
+   if(sslversion == "TLSv1")
+     final_version = CURL_SSLVERSION_TLSv1;
+   else if(sslversion == "SSLv3")
+     final_version = CURL_SSLVERSION_SSLv3;
+   curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);
+
+   // CRL file
+   string crlfile = _config->Find("Acquire::https::CrlFile","");
+   knob = "Acquire::https::"+remotehost+"::CrlFile";
+   crlfile = _config->Find(knob.c_str(),crlfile.c_str());
+   if(crlfile.empty() == false)
+      curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str());

 
    // cache-control
 
    // cache-control

-   if(_config->FindB("Acquire::http::No-Cache",false) == false)
+   if(_config->FindB("Acquire::https::No-Cache",
+       _config->FindB("Acquire::http::No-Cache",false)) == false)

    {
       // cache enabled
    {
       // cache enabled

-      if (_config->FindB("Acquire::http::No-Store",false) == true)
+      if (_config->FindB("Acquire::https::No-Store",
+               _config->FindB("Acquire::http::No-Store",false)) == true)

         headers = curl_slist_append(headers,"Cache-Control: no-store");
         headers = curl_slist_append(headers,"Cache-Control: no-store");

-      ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::http::Max-Age",0));
+      stringstream ss;
+      ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::https::Max-Age",
+               _config->FindI("Acquire::http::Max-Age",0)));

       headers = curl_slist_append(headers, ss.str().c_str());
    } else {
       // cache disabled by user
       headers = curl_slist_append(headers, ss.str().c_str());
    } else {
       // cache disabled by user


@@ -158,82 +279,165 @@ bool HttpsMethod::Fetch(FetchItem *Itm)
    }
    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
 
    }
    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
 

-   // set time values
-   curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
-   curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
-

    // speed limit
    // speed limit

-   int dlLimit = _config->FindI("Acquire::http::Dl-Limit",0)*1024;
+   int const dlLimit = _config->FindI("Acquire::https::Dl-Limit",
+               _config->FindI("Acquire::http::Dl-Limit",0))*1024;

    if (dlLimit > 0)
       curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
 
    // set header
    if (dlLimit > 0)
       curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
 
    // set header

-   curl_easy_setopt(curl, CURLOPT_USERAGENT,"Debian APT-CURL/1.0 ("VERSION")");
+   curl_easy_setopt(curl, CURLOPT_USERAGENT,
+       _config->Find("Acquire::https::User-Agent",
+               _config->Find("Acquire::http::User-Agent",
+                       "Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str());
+
+   // set timeout
+   int const timeout = _config->FindI("Acquire::https::Timeout",
+               _config->FindI("Acquire::http::Timeout",120));
+   curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
+   //set really low lowspeed timeout (see #497983)
+   curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, DL_MIN_SPEED);
+   curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout);
+
+   // set redirect options and default to 10 redirects
+   bool const AllowRedirect = _config->FindB("Acquire::https::AllowRedirect",
+       _config->FindB("Acquire::http::AllowRedirect",true));
+   curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
+   curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);

 
    // debug
    if(_config->FindB("Debug::Acquire::https", false))
       curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
 
    // error handling
 
    // debug
    if(_config->FindB("Debug::Acquire::https", false))
       curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
 
    // error handling

+   curl_errorstr[0] = '\0';

    curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 
    curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 

-   // In this case we send an if-range query with a range header
-  if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
-     curl_easy_setopt(curl, CURLOPT_RESUME_FROM, (long)SBuf.st_size);
+   // If we ask for uncompressed files servers might respond with content-
+   // negotiation which lets us end up with compressed files we do not support,
+   // see 657029, 657560 and co, so if we have no extension on the request
+   // ask for text only. As a sidenote: If there is nothing to negotate servers
+   // seem to be nice and ignore it.
+   if (_config->FindB("Acquire::https::SendAccept", _config->FindB("Acquire::http::SendAccept", true)) == true)
+   {
+      size_t const filepos = Itm->Uri.find_last_of('/');
+      string const file = Itm->Uri.substr(filepos + 1);
+      if (flExtension(file) == file)
+        headers = curl_slist_append(headers, "Accept: text/*");
+   }
+
+   // if we have the file send an if-range query with a range header
+   if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
+   {
+      std::string Buf;
+      strprintf(Buf, "Range: bytes=%lli-", (long long) SBuf.st_size);
+      headers = curl_slist_append(headers, Buf.c_str());
+      strprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
+      headers = curl_slist_append(headers, Buf.c_str());
+   }
+   else if(Itm->LastModified > 0)
+   {
+      curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
+      curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
+   }

 
    // go for it - if the file exists, append on it
    File = new FileFd(Itm->DestFile, FileFd::WriteAny);
 
    // go for it - if the file exists, append on it
    File = new FileFd(Itm->DestFile, FileFd::WriteAny);

-   File->Seek(File->Size());
-   
+   Server = new HttpsServerState(Itm->Uri, this);
+

    // keep apt updated
    Res.Filename = Itm->DestFile;
 
    // get it!
    CURLcode success = curl_easy_perform(curl);
 
    // keep apt updated
    Res.Filename = Itm->DestFile;
 
    // get it!
    CURLcode success = curl_easy_perform(curl);
 

+   // If the server returns 200 OK but the If-Modified-Since condition is not
+   // met, CURLINFO_CONDITION_UNMET will be set to 1
+   long curl_condition_unmet = 0;
+   curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &curl_condition_unmet);
+
+   File->Close();
+   curl_slist_free_all(headers);

 
    // cleanup
 
    // cleanup

-   if(success != 0) {
-      _error->Error(curl_errorstr);
-      Fail();
+   if (success != 0)
+   {
+      _error->Error("%s", curl_errorstr);
+      unlink(File->Name().c_str());
+      return false;
+   }
+
+   // server says file not modified
+   if (Server->Result == 304 || curl_condition_unmet == 1)
+   {
+      unlink(File->Name().c_str());
+      Res.IMSHit = true;
+      Res.LastModified = Itm->LastModified;
+      Res.Size = 0;
+      URIDone(Res);

       return true;
    }
       return true;
    }

+   Res.IMSHit = false;

 
 

-   if (Res.Size == 0)
-      Res.Size = File->Size();
+   if (Server->Result != 200 && // OK
+        Server->Result != 206 && // Partial
+        Server->Result != 416) // invalid Range
+   {
+      char err[255];
+      snprintf(err, sizeof(err) - 1, "HttpError%i", Server->Result);
+      SetFailReason(err);
+      _error->Error("%s", err);
+      // unlink, no need keep 401/404 page content in partial/
+      unlink(File->Name().c_str());
+      return false;
+   }

 
 

-   // check the downloaded result
-   struct stat Buf;
-   if (stat(File->Name().c_str(),&Buf) == 0)
+   struct stat resultStat;
+   if (unlikely(stat(File->Name().c_str(), &resultStat) != 0))

    {
    {

-      Res.Size = Buf.st_size;
-      Res.Filename = File->Name();
-      Res.LastModified = Buf.st_mtime;
-      Res.IMSHit = false;
-      if (Itm->LastModified != 0 && Buf.st_mtime >= Itm->LastModified)
-      {
-        Res.IMSHit = true;
-        Res.LastModified = Itm->LastModified;
-      }
+      _error->Errno("stat", "Unable to access file %s", File->Name().c_str());
+      return false;
+   }
+   Res.Size = resultStat.st_size;
+
+   // invalid range-request
+   if (Server->Result == 416)
+   {
+      unlink(File->Name().c_str());
+      Res.Size = 0;
+      delete File;
+      Redirect(Itm->Uri);
+      return true;
+   }
+
+   // Timestamp
+   curl_easy_getinfo(curl, CURLINFO_FILETIME, &Res.LastModified);
+   if (Res.LastModified != -1)
+   {
+      struct timeval times[2];
+      times[0].tv_sec = Res.LastModified;
+      times[1].tv_sec = Res.LastModified;
+      times[0].tv_usec = times[1].tv_usec = 0;
+      utimes(File->Name().c_str(), times);

    }
    }

+   else
+      Res.LastModified = resultStat.st_mtime;

 
    // take hashes
    Hashes Hash;
    FileFd Fd(Res.Filename, FileFd::ReadOnly);
 
    // take hashes
    Hashes Hash;
    FileFd Fd(Res.Filename, FileFd::ReadOnly);

-   Hash.AddFD(Fd.Fd(), Fd.Size());
+   Hash.AddFD(Fd);

    Res.TakeHashes(Hash);
    Res.TakeHashes(Hash);

-   
+

    // keep apt updated
    URIDone(Res);
 
    // cleanup
    // keep apt updated
    URIDone(Res);
 
    // cleanup

-   File->Close();

    Res.Size = 0;
    delete File;
    Res.Size = 0;
    delete File;

-   curl_slist_free_all(headers);

 
    return true;
 
    return true;

-};
+}

 
 int main()
 {
 
 int main()
 {


@@ -245,4 +449,3 @@ int main()
    return Mth.Run();
 }
 
    return Mth.Run();
 }
 

-