apt-pkg/contrib/proxy.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 /* ######################################################################
   4
   5    Proxy - Proxy releated functions
   6
   7    ##################################################################### */
   8                                                                         /*}}}*/
   9 // Include Files                                                        /*{{{*/
  10 #include<apt-pkg/configuration.h>
  11 #include<apt-pkg/error.h>
  12 #include<apt-pkg/fileutl.h>
  13 #include<apt-pkg/strutl.h>
  14
  15 #include<iostream>
  16 #include <unistd.h>
  17
  18 #include "proxy.h"
  19                                                                         /*}}}*/
  20
  21 // AutoDetectProxy - auto detect proxy                                  /*{{{*/
  22 // ---------------------------------------------------------------------
  23 /* */
  24 bool AutoDetectProxy(URI &URL)
  25 {
  26    // we support both http/https debug options
  27    bool Debug = _config->FindB("Debug::Acquire::"+URL.Access,false);
  28
  29    // the user already explicitly set a proxy for this host
  30    if(_config->Find("Acquire::"+URL.Access+"::proxy::"+URL.Host, "") != "")
  31       return true;
  32
  33    // option is "Acquire::http::Proxy-Auto-Detect" but we allow the old
  34    // name without the dash ("-")
  35    std::string AutoDetectProxyCmd = _config->Find("Acquire::"+URL.Access+"::Proxy-Auto-Detect",
  36                                       _config->Find("Acquire::"+URL.Access+"::ProxyAutoDetect"));
  37
  38    if (AutoDetectProxyCmd.empty())
  39       return true;
  40
  41    if (Debug)
  42       std::clog << "Using auto proxy detect command: " << AutoDetectProxyCmd << std::endl;
  43
  44    std::string const urlstring = URL;
  45    std::vector<const char *> Args;
  46    Args.push_back(AutoDetectProxyCmd.c_str());
  47    Args.push_back(urlstring.c_str());
  48    Args.push_back(nullptr);
  49    FileFd PipeFd;
  50    pid_t Child;
  51    if(Popen(&Args[0], PipeFd, Child, FileFd::ReadOnly) == false)
  52       return _error->Error("ProxyAutoDetect command '%s' failed!", AutoDetectProxyCmd.c_str());
  53    char buf[512];
  54    if (PipeFd.ReadLine(buf, sizeof(buf)) == nullptr)
  55       return _error->Error("Failed to read in AutoDetectProxy");
  56    PipeFd.Close();
  57    ExecWait(Child, "ProxyAutoDetect", true);
  58    auto const cleanedbuf = _strstrip(buf);
  59
  60    if (cleanedbuf[0] == '\0')
  61       return _error->Warning("ProxyAutoDetect returned no data");
  62
  63    if (Debug)
  64       std::clog << "auto detect command returned: '" << cleanedbuf << "'" << std::endl;
  65
  66    if (strstr(cleanedbuf, URL.Access.c_str()) == cleanedbuf)
  67       _config->Set("Acquire::"+URL.Access+"::proxy::"+URL.Host, cleanedbuf);
  68
  69    return true;
  70 }
  71                                                                         /*}}}*/