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::Timeout
 114    //       - http::Pipeline-Depth
 115    //       - error checking/reporting
 116    //       - more debug options? (CURLOPT_DEBUGFUNCTION?)
 117
 118    curl_easy_reset(curl);
 119    SetupProxy();
 120
 121    // callbacks
 122    curl_easy_setopt(curl, CURLOPT_URL, Itm->Uri.c_str());
 123    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
 124    curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
 125    curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
 126    curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
 127    curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
 128    curl_easy_setopt(curl, CURLOPT_FAILONERROR, true);
 129    curl_easy_setopt(curl, CURLOPT_FILETIME, true);
 130
 131    // FIXME: https: offer various options of verification
 132    bool peer_verify = _config->FindB("Acquire::https::Verify-Peer", false);
 133    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
 134
 135    // sslcert file
 136    string pem = _config->Find("Acquire::https::SslCert","");
 137    if(pem != "")
 138       curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
 139
 140    // CA-Dir
 141    string certdir = _config->Find("Acquire::https::CaPath","");
 142    if(certdir != "")
 143       curl_easy_setopt(curl, CURLOPT_CAPATH, certdir.c_str());
 144
 145    // Server-verify
 146    int verify = _config->FindI("Acquire::https::Verify-Host",2);
 147    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, verify);
 148
 149    // cache-control
 150    if(_config->FindB("Acquire::http::No-Cache",false) == false)
 151    {
 152       // cache enabled
 153       if (_config->FindB("Acquire::http::No-Store",false) == true)
 154          headers = curl_slist_append(headers,"Cache-Control: no-store");
 155       ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::http::Max-Age",0));
 156       headers = curl_slist_append(headers, ss.str().c_str());
 157    } else {
 158       // cache disabled by user
 159       headers = curl_slist_append(headers, "Cache-Control: no-cache");
 160       headers = curl_slist_append(headers, "Pragma: no-cache");
 161    }
 162    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
 163
 164    // speed limit
 165    int dlLimit = _config->FindI("Acquire::http::Dl-Limit",0)*1024;
 166    if (dlLimit > 0)
 167       curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
 168
 169    // set header
 170    curl_easy_setopt(curl, CURLOPT_USERAGENT,"Debian APT-CURL/1.0 ("VERSION")");
 171
 172    // debug
 173    if(_config->FindB("Debug::Acquire::https", false))
 174       curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
 175
 176    // error handling
 177    curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 178
 179    // if we have the file send an if-range query with a range header
 180    if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
 181    {
 182       char Buf[1000];
 183       sprintf(Buf,"Range: bytes=%li-\r\nIf-Range: %s\r\n",
 184               (long)SBuf.st_size - 1,
 185               TimeRFC1123(SBuf.st_mtime).c_str());
 186       headers = curl_slist_append(headers, Buf);
 187    }
 188    else if(Itm->LastModified > 0)
 189    {
 190       curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
 191       curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
 192    }
 193
 194    // go for it - if the file exists, append on it
 195    File = new FileFd(Itm->DestFile, FileFd::WriteAny);
 196    if (File->Size() > 0)
 197       File->Seek(File->Size() - 1);
 198
 199    // keep apt updated
 200    Res.Filename = Itm->DestFile;
 201
 202    // get it!
 203    CURLcode success = curl_easy_perform(curl);
 204    curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &curl_responsecode);
 205
 206    long curl_servdate;
 207    curl_easy_getinfo(curl, CURLINFO_FILETIME, &curl_servdate);
 208
 209    // cleanup
 210    if(success != 0)
 211    {
 212       unlink(File->Name().c_str());
 213       _error->Error(curl_errorstr);
 214       Fail();
 215       return true;
 216    }
 217    File->Close();
 218
 219    // Timestamp
 220    struct utimbuf UBuf;
 221    if (curl_servdate != -1) {
 222        UBuf.actime = curl_servdate;
 223        UBuf.modtime = curl_servdate;
 224        utime(File->Name().c_str(),&UBuf);
 225    }
 226
 227    // check the downloaded result
 228    struct stat Buf;
 229    if (stat(File->Name().c_str(),&Buf) == 0)
 230    {
 231       Res.Filename = File->Name();
 232       Res.LastModified = Buf.st_mtime;
 233       Res.IMSHit = false;
 234       if (curl_responsecode == 304)
 235       {
 236          unlink(File->Name().c_str());
 237          Res.IMSHit = true;
 238          Res.LastModified = Itm->LastModified;
 239          Res.Size = 0;
 240          URIDone(Res);
 241          return true;
 242       }
 243       Res.Size = Buf.st_size;
 244    }
 245
 246    // take hashes
 247    Hashes Hash;
 248    FileFd Fd(Res.Filename, FileFd::ReadOnly);
 249    Hash.AddFD(Fd.Fd(), Fd.Size());
 250    Res.TakeHashes(Hash);
 251
 252    // keep apt updated
 253    URIDone(Res);
 254
 255    // cleanup
 256    Res.Size = 0;
 257    delete File;
 258    curl_slist_free_all(headers);
 259
 260    return true;
 261 };
 262
 263 int main()
 264 {
 265    setlocale(LC_ALL, "");
 266
 267    HttpsMethod Mth;
 268    curl_global_init(CURL_GLOBAL_SSL) ;
 269
 270    return Mth.Run();
 271 }
 272
 273