methods/https.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
   4 /* ######################################################################
   5
   6    HTTPS Acquire Method - This is the HTTPS aquire method for APT.
   7
   8    It uses libcurl
   9
  10    ##################################################################### */
  11                                                                         /*}}}*/
  12 // Include Files                                                        /*{{{*/
  13 #include <apt-pkg/fileutl.h>
  14 #include <apt-pkg/acquire-method.h>
  15 #include <apt-pkg/error.h>
  16 #include <apt-pkg/hashes.h>
  17
  18 #include <sys/stat.h>
  19 #include <sys/time.h>
  20 #include <utime.h>
  21 #include <unistd.h>
  22 #include <signal.h>
  23 #include <stdio.h>
  24 #include <errno.h>
  25 #include <string.h>
  26 #include <iostream>
  27 #include <apti18n.h>
  28 #include <sstream>
  29
  30 #include "config.h"
  31 #include "https.h"
  32
  33                                                                         /*}}}*/
  34 using namespace std;
  35
  36 size_t
  37 HttpsMethod::write_data(void *buffer, size_t size, size_t nmemb, void *userp)
  38 {
  39    HttpsMethod *me = (HttpsMethod *)userp;
  40
  41    if(me->File->Write(buffer, size*nmemb) != true)
  42       return false;
  43
  44    return size*nmemb;
  45 }
  46
  47 int
  48 HttpsMethod::progress_callback(void *clientp, double dltotal, double dlnow,
  49                               double ultotal, double ulnow)
  50 {
  51    HttpsMethod *me = (HttpsMethod *)clientp;
  52    if(dltotal > 0 && me->Res.Size == 0) {
  53       me->Res.Size = (unsigned long)dltotal;
  54       me->URIStart(me->Res);
  55    }
  56    return 0;
  57 }
  58
  59 void HttpsMethod::SetupProxy()
  60 {
  61    URI ServerName = Queue->Uri;
  62
  63    // Determine the proxy setting
  64    if (getenv("http_proxy") == 0)
  65    {
  66       string DefProxy = _config->Find("Acquire::http::Proxy");
  67       string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
  68       if (SpecificProxy.empty() == false)
  69       {
  70          if (SpecificProxy == "DIRECT")
  71             Proxy = "";
  72          else
  73             Proxy = SpecificProxy;
  74       }
  75       else
  76          Proxy = DefProxy;
  77    }
  78
  79    // Parse no_proxy, a , separated list of domains
  80    if (getenv("no_proxy") != 0)
  81    {
  82       if (CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
  83          Proxy = "";
  84    }
  85
  86    // Determine what host and port to use based on the proxy settings
  87    string Host;
  88    if (Proxy.empty() == true || Proxy.Host.empty() == true)
  89    {
  90    }
  91    else
  92    {
  93       if (Proxy.Port != 0)
  94          curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
  95       curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
  96    }
  97 }
  98
  99
 100 // HttpsMethod::Fetch - Fetch an item                                   /*{{{*/
 101 // ---------------------------------------------------------------------
 102 /* This adds an item to the pipeline. We keep the pipeline at a fixed
 103    depth. */
 104 bool HttpsMethod::Fetch(FetchItem *Itm)
 105 {
 106    stringstream ss;
 107    struct stat SBuf;
 108    struct curl_slist *headers=NULL;
 109    char curl_errorstr[CURL_ERROR_SIZE];
 110    long curl_responsecode;
 111
 112    // TODO:
 113    //       - http::Pipeline-Depth
 114    //       - error checking/reporting
 115    //       - more debug options? (CURLOPT_DEBUGFUNCTION?)
 116
 117    curl_easy_reset(curl);
 118    SetupProxy();
 119
 120    // callbacks
 121    curl_easy_setopt(curl, CURLOPT_URL, Itm->Uri.c_str());
 122    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
 123    curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
 124    curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
 125    curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
 126    curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
 127    curl_easy_setopt(curl, CURLOPT_FAILONERROR, true);
 128    curl_easy_setopt(curl, CURLOPT_FILETIME, true);
 129
 130    // FIXME: https: offer various options of verification
 131    bool peer_verify = _config->FindB("Acquire::https::Verify-Peer", false);
 132    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
 133
 134    // sslcert file
 135    string pem = _config->Find("Acquire::https::SslCert","");
 136    if(pem != "")
 137       curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
 138
 139    // CA-Dir
 140    string certdir = _config->Find("Acquire::https::CaPath","");
 141    if(certdir != "")
 142       curl_easy_setopt(curl, CURLOPT_CAPATH, certdir.c_str());
 143
 144    // Server-verify
 145    int verify = _config->FindI("Acquire::https::Verify-Host",2);
 146    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, verify);
 147
 148    // cache-control
 149    if(_config->FindB("Acquire::http::No-Cache",false) == false)
 150    {
 151       // cache enabled
 152       if (_config->FindB("Acquire::http::No-Store",false) == true)
 153          headers = curl_slist_append(headers,"Cache-Control: no-store");
 154       ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::http::Max-Age",0));
 155       headers = curl_slist_append(headers, ss.str().c_str());
 156    } else {
 157       // cache disabled by user
 158       headers = curl_slist_append(headers, "Cache-Control: no-cache");
 159       headers = curl_slist_append(headers, "Pragma: no-cache");
 160    }
 161    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
 162
 163    // speed limit
 164    int dlLimit = _config->FindI("Acquire::http::Dl-Limit",0)*1024;
 165    if (dlLimit > 0)
 166       curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
 167
 168    // set header
 169    curl_easy_setopt(curl, CURLOPT_USERAGENT,"Debian APT-CURL/1.0 ("VERSION")");
 170
 171    // set timeout
 172    int timeout = _config->FindI("Acquire::http::Timeout",120);
 173    curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);
 174    curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
 175
 176    // debug
 177    if(_config->FindB("Debug::Acquire::https", false))
 178       curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
 179
 180    // error handling
 181    curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 182
 183    // if we have the file send an if-range query with a range header
 184    if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
 185    {
 186       char Buf[1000];
 187       sprintf(Buf,"Range: bytes=%li-\r\nIf-Range: %s\r\n",
 188               (long)SBuf.st_size - 1,
 189               TimeRFC1123(SBuf.st_mtime).c_str());
 190       headers = curl_slist_append(headers, Buf);
 191    }
 192    else if(Itm->LastModified > 0)
 193    {
 194       curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
 195       curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
 196    }
 197
 198    // go for it - if the file exists, append on it
 199    File = new FileFd(Itm->DestFile, FileFd::WriteAny);
 200    if (File->Size() > 0)
 201       File->Seek(File->Size() - 1);
 202
 203    // keep apt updated
 204    Res.Filename = Itm->DestFile;
 205
 206    // get it!
 207    CURLcode success = curl_easy_perform(curl);
 208    curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &curl_responsecode);
 209
 210    long curl_servdate;
 211    curl_easy_getinfo(curl, CURLINFO_FILETIME, &curl_servdate);
 212
 213    // cleanup
 214    if(success != 0)
 215    {
 216       unlink(File->Name().c_str());
 217       _error->Error(curl_errorstr);
 218       Fail();
 219       return true;
 220    }
 221    File->Close();
 222
 223    // Timestamp
 224    struct utimbuf UBuf;
 225    if (curl_servdate != -1) {
 226        UBuf.actime = curl_servdate;
 227        UBuf.modtime = curl_servdate;
 228        utime(File->Name().c_str(),&UBuf);
 229    }
 230
 231    // check the downloaded result
 232    struct stat Buf;
 233    if (stat(File->Name().c_str(),&Buf) == 0)
 234    {
 235       Res.Filename = File->Name();
 236       Res.LastModified = Buf.st_mtime;
 237       Res.IMSHit = false;
 238       if (curl_responsecode == 304)
 239       {
 240          unlink(File->Name().c_str());
 241          Res.IMSHit = true;
 242          Res.LastModified = Itm->LastModified;
 243          Res.Size = 0;
 244          URIDone(Res);
 245          return true;
 246       }
 247       Res.Size = Buf.st_size;
 248    }
 249
 250    // take hashes
 251    Hashes Hash;
 252    FileFd Fd(Res.Filename, FileFd::ReadOnly);
 253    Hash.AddFD(Fd.Fd(), Fd.Size());
 254    Res.TakeHashes(Hash);
 255
 256    // keep apt updated
 257    URIDone(Res);
 258
 259    // cleanup
 260    Res.Size = 0;
 261    delete File;
 262    curl_slist_free_all(headers);
 263
 264    return true;
 265 };
 266
 267 int main()
 268 {
 269    setlocale(LC_ALL, "");
 270
 271    HttpsMethod Mth;
 272    curl_global_init(CURL_GLOBAL_SSL) ;
 273
 274    return Mth.Run();
 275 }
 276
 277