Fix body for nginx on robot txt

Author: joelwurtz

src/ngx_http_redirectionio_module.c

@@ -371,7 +371,10 @@ static ngx_int_t ngx_http_redirectionio_redirect_handler(ngx_http_request_t *r)
 
     r->headers_out.status = redirect_status_code;
 
-    return r->headers_out.status;
+    // Force special response for 2XX request
+    ngx_http_finalize_request(r, ngx_http_special_response_handler(r, r->headers_out.status));
+
+    return NGX_DONE;
 }
 
 static ngx_int_t ngx_http_redirectionio_log_handler(ngx_http_request_t *r) {

src/ngx_http_redirectionio_module_filter.c

@@ -463,7 +463,14 @@ static ngx_int_t ngx_http_redirectionio_buffer_read(ngx_buf_t *buffer, struct RE
 
     bsize = ngx_buf_size(buffer);
 
-    if (bsize <= 0) {
+    if (bsize == 0) {
+        output->data = NULL;
+        output->len = 0;
+
+        return NGX_OK;
+    }
+
+    if (bsize < 0) {
         return NGX_DONE;
     }