curl: patched to read IE proxy settings on Windows

Change-Id: I46605f6c8dfacab0feb5a446db458eed8e5756ee

curl/UnpackedTarball_curl.mk

@@ -23,6 +23,7 @@ $(eval $(call gb_UnpackedTarball_add_patches,curl,\
 	curl/curl-aix.patch \
 	curl/curl-7.26.0_win.patch \
 	curl/curl-7.26.0_mingw.patch \
+	curl/curl-7.26.0_win-proxy.patch \
 ))
 ifeq ($(OS),ANDROID)
 $(eval $(call gb_UnpackedTarball_add_patches,curl,\

curl/curl-7.26.0_win-proxy.patch

+--- curl-7.26.0/lib/Makefile.vc9
++++ misc/build/curl-7.26.0/lib/Makefile.vc9
+@@ -116,7 +116,7 @@ LFLAGS     = /nologo /machine:$(MACHINE)
+ SSLLIBS    = libeay32.lib ssleay32.lib
+ ZLIBLIBSDLL= zdll.lib
+ ZLIBLIBS   = zlib.lib
+-WINLIBS    = ws2_32.lib wldap32.lib
++WINLIBS    = ws2_32.lib wldap32.lib winhttp.lib
+ CFLAGS     = $(CFLAGS) $(EXCFLAGS)
+ 
+ CFGSET     = FALSE
+--- curl-7.26.0/lib/url.c
++++ misc/build/curl-7.26.0/lib/url.c
+@@ -80,6 +80,10 @@ void idn_free (void *ptr);
+ int curl_win32_idn_to_ascii(const char *in, char **out);
+ #endif  /* USE_LIBIDN */
+ 
++#ifdef WIN32
++#include <WinHttp.h>
++#endif
++
+ #include "urldata.h"
+ #include "netrc.h"
+ 
+@@ -4111,6 +4115,21 @@ static bool check_noproxy(const char* name, const char* no_proxy)
+   return FALSE;
+ }
+ 
++#ifdef WIN32
++static char* wstrToCstr( LPWSTR wStr )
++{
++	int bufSize;
++	char* out = NULL;
++	if ( wStr != NULL )
++	{
++		bufSize = WideCharToMultiByte( CP_ACP,  0, wStr, -1, NULL, 0, NULL, NULL );
++		out = ( char* )malloc( bufSize * sizeof(char));
++		WideCharToMultiByte( CP_ACP, 0, wStr, -1, out, bufSize, NULL, NULL );
++	}
++	return out;
++}
++#endif
++
+ /****************************************************************
+ * Detect what (if any) proxy to use. Remember that this selects a host
+ * name and is not limited to HTTP proxies only.
+@@ -4119,6 +4138,7 @@ static bool check_noproxy(const char* name, const char* no_proxy)
+ static char *detect_proxy(struct connectdata *conn)
+ {
+   char *proxy = NULL;
++  char *no_proxy=NULL;
+ 
+ #ifndef CURL_DISABLE_HTTP
+   /* If proxy was not specified, we check for default proxy environment
+@@ -4138,7 +4158,57 @@ static char *detect_proxy(struct connectdata *conn)
+    * For compatibility, the all-uppercase versions of these variables are
+    * checked if the lowercase versions don't exist.
+    */
+-  char *no_proxy=NULL;
++#ifdef WIN32
++  WINHTTP_CURRENT_USER_IE_PROXY_CONFIG *ieProxyConfig;
++  ieProxyConfig = (WINHTTP_CURRENT_USER_IE_PROXY_CONFIG*)malloc(sizeof(WINHTTP_CURRENT_USER_IE_PROXY_CONFIG));
++  if(WinHttpGetIEProxyConfigForCurrentUser(ieProxyConfig)) {
++    if(!ieProxyConfig->fAutoDetect) {
++      char *ieProxy;
++      char *ieNoProxy;
++		  char* pos;
++
++      ieProxy = wstrToCstr(ieProxyConfig->lpszProxy);
++      ieNoProxy = wstrToCstr(ieProxyConfig->lpszProxyBypass);
++
++			/* Convert the ieNoProxy into a proper no_proxy value */
++      no_proxy = strdup(ieNoProxy);
++      pos = strpbrk(no_proxy, "; ");
++      while (NULL != pos) {
++        no_proxy[pos-no_proxy] = ',';
++        pos = strpbrk(no_proxy, "; ");
++      }
++
++      if(!check_noproxy(conn->host.name, no_proxy)) {
++        /* Look for the http proxy setting */
++        char* tok;
++
++        tok = strtok(ieProxy, ";");
++        if(strchr(tok, '=') == NULL) {
++          proxy = strdup(ieProxy);
++        }
++        else {
++          do {
++            if(strncmp(tok, "http=", 5) == 0) {
++              /* We found HTTP proxy value, then use it */
++              proxy = strdup( tok + 5 );
++            }
++          }
++          while(NULL != strtok(NULL, ";"));
++        }
++      }
++
++      free(ieProxy);
++      free(ieNoProxy);
++    }
++    else {
++      /* TODO Handle the Proxy config Auto Detection case */
++    }
++		
++    GlobalFree( ieProxyConfig->lpszAutoConfigUrl );
++		GlobalFree( ieProxyConfig->lpszProxy );
++		GlobalFree( ieProxyConfig->lpszProxyBypass );
++  }
++#else /* !WIN32 */
+   char proxy_env[128];
+ 
+   no_proxy=curl_getenv("no_proxy");
+@@ -4189,9 +4259,9 @@ static char *detect_proxy(struct connectdata *conn)
+     }
+   } /* if(!check_noproxy(conn->host.name, no_proxy)) - it wasn't specified
+        non-proxy */
++#endif /* WIN32 */
+   if(no_proxy)
+     free(no_proxy);
+-
+ #else /* !CURL_DISABLE_HTTP */
+ 
+   (void)conn;