winhttp: Implement WinHttpQueryHeaders(WINHTTP_QUERY_VERSION).

dlls/winhttp/request.c

@@ -652,6 +652,24 @@ static BOOL query_headers( request_t *request, DWORD level, LPCWSTR name, LPVOID
         if (request_only) heap_free( headers );
         return ret;
     }
+    case WINHTTP_QUERY_VERSION:
+    {
+        DWORD len = (strlenW( request->version ) + 1) * sizeof(WCHAR);
+        if (len > *buflen)
+        {
+            set_last_error( ERROR_INSUFFICIENT_BUFFER );
+            *buflen = len;
+            return FALSE;
+        }
+        else if (buffer)
+        {
+            strcpyW( buffer, request->version );
+            TRACE("returning string: %s\n", debugstr_w(buffer));
+            ret = TRUE;
+        }
+        *buflen = len - sizeof(WCHAR);
+        return ret;
+    }
     default:
     {
         if (attr >= sizeof(attribute_table)/sizeof(attribute_table[0]) || !attribute_table[attr])

dlls/winhttp/tests/winhttp.c

@@ -816,7 +816,8 @@ static void test_request_parameter_defaults(void)
     static const WCHAR codeweavers[] = {'c','o','d','e','w','e','a','v','e','r','s','.','c','o','m',0};
 
     HANDLE ses, con, req;
-    DWORD size, status;
+    DWORD size, status, error;
+    WCHAR *version;
     BOOL ret;
 
     ses = WinHttpOpen(test_useragent, 0, NULL, NULL, 0);
@@ -850,6 +851,19 @@ static void test_request_parameter_defaults(void)
     ret = WinHttpReceiveResponse(req, NULL);
     ok(ret, "failed to receive response %u\n", GetLastError());
 
+    size = 0;
+    SetLastError(0xdeadbeef);
+    ret = WinHttpQueryHeaders(req, WINHTTP_QUERY_VERSION, NULL, NULL, &size, NULL);
+    error = GetLastError();
+    ok(!ret, "succeeded unexpectedly\n");
+    ok(error == ERROR_INSUFFICIENT_BUFFER, "expected ERROR_INSUFFICIENT_BUFFER, got %u\n", error);
+
+    version = HeapAlloc(GetProcessHeap(), 0, size);
+    ret = WinHttpQueryHeaders(req, WINHTTP_QUERY_VERSION, NULL, version, &size, NULL);
+    ok(ret, "failed unexpectedly %u\n", GetLastError());
+    ok(lstrlenW(version) == size / sizeof(WCHAR), "unexpected size %u\n", size);
+    HeapFree(GetProcessHeap(), 0, version);
+
     size = sizeof(status);
     ret = WinHttpQueryHeaders(req, WINHTTP_QUERY_STATUS_CODE | WINHTTP_QUERY_FLAG_NUMBER, NULL, &status, &size, NULL);
     ok(ret, "failed unexpectedly %u\n", GetLastError());