Make apt proxy options have the highest priority, unified proxy determining code.

configure.in

@@ -18,7 +18,7 @@ AC_CONFIG_AUX_DIR(buildlib)
 AC_CONFIG_HEADER(include/config.h:buildlib/config.h.in include/apti18n.h:buildlib/apti18n.h.in)
 
 dnl -- SET THIS TO THE RELEASE VERSION --
-AC_DEFINE_UNQUOTED(VERSION,"0.7.20~exp3")
+AC_DEFINE_UNQUOTED(VERSION,"0.7.20")
 PACKAGE="apt"
 AC_DEFINE_UNQUOTED(PACKAGE,"$PACKAGE")
 AC_SUBST(PACKAGE)

debian/changelog

@@ -13,6 +13,12 @@ apt (0.7.20) unstable; urgency=low
     - Mentioned 'APT::Periodic' and 'APT::Archives' groups of options.
       (Closes: #438559)
     - Mentioned '/* ... */' comments. (Closes: #507601)
+  * methods/{http,https,ftp}, doc/apt.conf.5.xml:
+    - Changed and unified the code that determines which proxy to use. Now
+      'Acquire::{http,ftp}::Proxy[::<host>]' options have the highest priority,
+      and '{http,ftp}_proxy' environment variables are used only if options
+      mentioned above are not specified.
+      (Closes: #445985, #157759, #320184, #365880, #479617)
 
   [ Michael Vogt ]
   * make "apt-get build-dep" installed packages marked automatic

doc/apt.conf.5.xml

@@ -202,8 +202,9 @@ DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt";};
      standard form of <literal>http://[[user][:pass]@]host[:port]/</literal>. Per 
      host proxies can also be specified by using the form 
      <literal>http::Proxy::&lt;host&gt;</literal> with the special keyword <literal>DIRECT</literal> 
-     meaning to use no proxies. The <envar>http_proxy</envar> environment variable
-     will override all settings.</para>
+	 meaning to use no proxies. If no one of the above settings is specified,
+	 <envar>http_proxy</envar> environment variable
+	 will be used.</para>
 
      <para>Three settings are provided for cache control with HTTP/1.1 compliant 
      proxy caches. <literal>No-Cache</literal> tells the proxy to not use its cached 
@@ -251,9 +252,13 @@ DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt";};
 	 </para></listitem></varlistentry>
 
      <varlistentry><term>ftp</term>
-     <listitem><para>FTP URIs; ftp::Proxy is the default proxy server to use. It is in the 
-     standard form of <literal>ftp://[[user][:pass]@]host[:port]/</literal> and is 
-     overridden by the <envar>ftp_proxy</envar> environment variable. To use a ftp 
+     <listitem><para>FTP URIs; ftp::Proxy is the default ftp proxy to use. It is in the 
+     standard form of <literal>ftp://[[user][:pass]@]host[:port]/</literal>. Per 
+     host proxies can also be specified by using the form 
+     <literal>ftp::Proxy::&lt;host&gt;</literal> with the special keyword <literal>DIRECT</literal> 
+	 meaning to use no proxies. If no one of the above settings is specified,
+	 <envar>ftp_proxy</envar> environment variable
+	 will be used. To use a ftp 
      proxy you will have to set the <literal>ftp::ProxyLogin</literal> script in the 
      configuration file. This entry specifies the commands to send to tell 
      the proxy server what to connect to. Please see 

methods/ftp.cc

@@ -112,23 +112,28 @@ bool FTPConn::Open(pkgAcqMethod *Owner)
    Close();
    
    // Determine the proxy setting
-   if (getenv("ftp_proxy") == 0)
+   string SpecificProxy = _config->Find("Acquire::ftp::Proxy::" + ServerName.Host);
+   if (!SpecificProxy.empty())
    {
-      string DefProxy = _config->Find("Acquire::ftp::Proxy");
-      string SpecificProxy = _config->Find("Acquire::ftp::Proxy::" + ServerName.Host);
-      if (SpecificProxy.empty() == false)
-      {
-	 if (SpecificProxy == "DIRECT")
-	    Proxy = "";
-	 else
-	    Proxy = SpecificProxy;
-      }   
-      else
-	 Proxy = DefProxy;
+	   if (SpecificProxy == "DIRECT")
+		   Proxy = "";
+	   else
+		   Proxy = SpecificProxy;
    }
    else
-      Proxy = getenv("ftp_proxy");
-   
+   {
+	   string DefProxy = _config->Find("Acquire::ftp::Proxy");
+	   if (!DefProxy.empty())
+	   {
+		   Proxy = DefProxy;
+	   }
+	   else
+	   {
+		   char* result = getenv("ftp_proxy");
+		   Proxy = result ? result : "";
+	   }
+   }
+
    // Parse no_proxy, a , separated list of domains
    if (getenv("no_proxy") != 0)
    {

methods/http.cc

@@ -309,22 +309,27 @@ bool ServerState::Open()
    Persistent = true;
    
    // Determine the proxy setting
-   if (getenv("http_proxy") == 0)
+   string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
+   if (!SpecificProxy.empty())
    {
-      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;
+	   if (SpecificProxy == "DIRECT")
+		   Proxy = "";
+	   else
+		   Proxy = SpecificProxy;
    }
    else
-      Proxy = getenv("http_proxy");
+   {
+	   string DefProxy = _config->Find("Acquire::http::Proxy");
+	   if (!DefProxy.empty())
+	   {
+		   Proxy = DefProxy;
+	   }
+	   else
+	   {
+		   char* result = getenv("http_proxy");
+		   Proxy = result ? result : "";
+	   }
+   }
    
    // Parse no_proxy, a , separated list of domains
    if (getenv("no_proxy") != 0)

methods/https.cc

@@ -61,19 +61,26 @@ void HttpsMethod::SetupProxy()
    URI ServerName = Queue->Uri;
 
    // Determine the proxy setting
-   if (getenv("http_proxy") == 0)
+   string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
+   if (!SpecificProxy.empty())
    {
-      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;
+	   if (SpecificProxy == "DIRECT")
+		   Proxy = "";
+	   else
+		   Proxy = SpecificProxy;
+   }
+   else
+   {
+	   string DefProxy = _config->Find("Acquire::http::Proxy");
+	   if (!DefProxy.empty())
+	   {
+		   Proxy = DefProxy;
+	   }
+	   else
+	   {
+		   char* result = getenv("http_proxy");
+		   Proxy = result ? result : "";
+	   }
    }
    
    // Parse no_proxy, a , separated list of domains