diff --git a/src/http/modules/ngx_http_dav_module.c b/src/http/modules/ngx_http_dav_module.c
index e60b8cf..b41bd8e 100644
--- a/src/http/modules/ngx_http_dav_module.c
+++ b/src/http/modules/ngx_http_dav_module.c
@@ -116,10 +116,6 @@
             return NGX_DECLINED;
         }
 
-        if (r->headers_in.content_length_n < 0) {
-            return NGX_HTTP_BAD_REQUEST;
-        }
-
         r->request_body_in_file_only = 1;
         r->request_body_in_persistent_file = 1;
         r->request_body_delete_incomplete_file = 1;
@@ -312,6 +308,8 @@
             ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
             return;
         }
+
+        r->headers_out.content_length_n = 0;
     }
 
     r->headers_out.status = status;
diff --git a/src/http/modules/ngx_http_fastcgi_module.c b/src/http/modules/ngx_http_fastcgi_module.c
index f901a52..ff55118 100644
--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -1173,6 +1173,11 @@
         if (f->type == NGX_HTTP_FASTCGI_STDERR) {
 
             if (f->length) {
+
+                if (f->pos == f->last) {
+                    break;
+                }
+
                 line.data = f->pos;
 
                 if (f->pos + f->length <= f->last) {
@@ -1212,6 +1217,10 @@
 
         /* f->type == NGX_HTTP_FASTCGI_STDOUT */
 
+        if (f->pos == f->last) {
+            break;
+        }
+
         if (p->free) {
             b = p->free->buf;
             p->free = p->free->next;
diff --git a/src/http/modules/ngx_http_static_module.c b/src/http/modules/ngx_http_static_module.c
index 0dbec50..3399e50 100644
--- a/src/http/modules/ngx_http_static_module.c
+++ b/src/http/modules/ngx_http_static_module.c
@@ -86,6 +86,10 @@
     ngx_pool_cleanup_file_t   *clnf;
     ngx_http_core_loc_conf_t  *clcf;
 
+    if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
+        return NGX_HTTP_NOT_ALLOWED;
+    }
+
     if (r->uri.data[r->uri.len - 1] == '/') {
         return NGX_DECLINED;
     }
@@ -95,10 +99,6 @@
         return NGX_DECLINED;
     }
 
-    if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
-        return NGX_HTTP_NOT_ALLOWED;
-    }
-
     rc = ngx_http_discard_body(r);
 
     if (rc != NGX_OK && rc != NGX_AGAIN) {
diff --git a/src/http/modules/perl/ngx_http_perl_module.c b/src/http/modules/perl/ngx_http_perl_module.c
index 136bac3..aa0e41d 100644
--- a/src/http/modules/perl/ngx_http_perl_module.c
+++ b/src/http/modules/perl/ngx_http_perl_module.c
@@ -483,8 +483,10 @@
     }
 #endif
 
-    if (ngx_conf_full_name(cf->cycle, &pmcf->modules) != NGX_OK) {
-        return NGX_CONF_ERROR;
+    if (pmcf->modules.data) {
+        if (ngx_conf_full_name(cf->cycle, &pmcf->modules) != NGX_OK) {
+            return NGX_CONF_ERROR;
+        }
     }
 
     PERL_SYS_INIT(&ngx_argc, &ngx_argv);