curl: get winProxy support back

with properly aligned asterisks

Change-Id: I48b31bce45cdce378fa1cfdd9ddde82b9e669cf5
Reviewed-on: https://gerrit.libreoffice.org/33500
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>

external/curl/curl-7.26.0_win-proxy.patch

@@ -9,3 +9,120 @@
  CFLAGS       = $(CFLAGS) $(EXCFLAGS)
  
  CFGSET       = FALSE
+--- curl-7.26.0/lib/url.c
++++ misc/build/curl-7.26.0/lib/url.c
+@@ -78,6 +78,10 @@
+ bool curl_win32_idn_to_ascii(const char *in, char **out);
+ #endif  /* USE_LIBIDN2 */
+ 
++#ifdef _WIN32
++#include <WinHttp.h>
++#endif
++
+ #include "urldata.h"
+ #include "netrc.h"
+ 
+@@ -4586,6 +4590,21 @@
+   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.
+@@ -4594,6 +4613,7 @@
+ 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
+@@ -4613,7 +4633,64 @@
+    * 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 */
++      if(NULL != ieNoProxy) {
++        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;
++        char *saveptr;
++
++        if(NULL != ieProxy) {
++          tok = strtok_s(ieProxy, ";", &saveptr);
++          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);
++              }
++              tok = strtok_s(NULL, ";", &saveptr);
++            }
++            while(NULL != tok);
++          }
++        }
++      }
++
++      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");
+@@ -4663,6 +4739,7 @@
+     }
+   } /* if(!check_noproxy(conn->host.name, no_proxy)) - it wasn't specified
+        non-proxy */
++#endif /* WIN32 */
+   free(no_proxy);
+ 
+ #else /* !CURL_DISABLE_HTTP */