diff -r ad0c9dacd7e3 -r c8755c87ce7f libidav/webdav.c
--- a/libidav/webdav.c	Fri Aug 30 12:48:15 2013 +0200
+++ b/libidav/webdav.c	Mon Sep 02 10:31:29 2013 +0200
@@ -46,10 +46,9 @@
         return NULL;
     }
     context->sessions = NULL;
+    context->http_proxy = calloc(1, sizeof(DavProxy));
+    context->https_proxy = calloc(1, sizeof(DavProxy));
     context->namespaces = ucx_map_new(16);
-    context->http_proxy = NULL;
-    context->https_proxy = NULL;
-    context->no_proxy = NULL;
     if(!context->namespaces) {
         free(context);
         return NULL;
@@ -77,6 +76,8 @@
     UCX_FOREACH(elm, ctx->sessions) {
         dav_session_destroy(elm->data);
     }
+    free(ctx->http_proxy);
+    free(ctx->https_proxy);
     
     UcxMapIterator i = ucx_map_iterator(ctx->namespaces);
     UcxKey k;
@@ -149,23 +150,29 @@
     sn->handle = curl_easy_init();
     //curl_easy_setopt(sn->handle, CURLOPT_VERBOSE, 1L);
     //curl_easy_setopt(sn->handle, CURLOPT_STDERR, stderr);
-    
+
     // set proxy
-    if(sstrprefix(url, S("https"))) {
-        if(context->https_proxy) {
-            //printf("use https_proxy: %s\n", context->https_proxy);
-            curl_easy_setopt(sn->handle, CURLOPT_PROXY, context->https_proxy);
+    DavProxy *proxy = sstrprefix(url, S("https")) ? context->https_proxy
+                                                  : context->http_proxy;
+
+    if (proxy->url) {
+        curl_easy_setopt(sn->handle, CURLOPT_PROXY, proxy->url);
+        if (proxy->username) {
+            curl_easy_setopt(sn->handle, CURLOPT_PROXYUSERNAME,
+                proxy->username);
+            if (proxy->password) {
+                curl_easy_setopt(sn->handle, CURLOPT_PROXYPASSWORD,
+                    proxy->password);
+            } else {
+                // TODO: prompt
+            }
         }
-    } else {
-        if(context->http_proxy) {
-            //printf("use http_proxy: %s\n", context->http_proxy);
-            curl_easy_setopt(sn->handle, CURLOPT_PROXY, context->http_proxy);
+        if(proxy->no_proxy) {
+            curl_easy_setopt(sn->handle, CURLOPT_NOPROXY,
+                proxy->no_proxy);
         }
     }
-    if(context->no_proxy) {
-        //printf("use no_proxy: %s\n", context->no_proxy);
-        curl_easy_setopt(sn->handle, CURLOPT_NOPROXY, context->no_proxy);
-    }
+    
     // set url
     curl_easy_setopt(sn->handle, CURLOPT_URL, base_url);