Turned off auto-posting by default.

 * Can opt-in to auto-posting by setting `get_max_request_entity_size` to a number. (e.g. 2048)
 * Changed URL length check to be UTF8-friendly

lib/solr.js

@@ -83,7 +83,7 @@ function Client(options){
       agent : options.agent,
       secure : options.secure || false,
       bigint : options.bigint || false,
-      get_max_request_entity_size: options.get_max_request_entity_size || 2048
+      get_max_request_entity_size: options.get_max_request_entity_size || false
    };
 
    // Default paths of all request handlers
@@ -575,9 +575,9 @@ Client.prototype.get = function(handler,query,callback){
             return element;
          })
          .join('/'),
-       approxUrlLength = 10 + this.options.host.length + (this.options.port+"").length + fullPath.length; // Buffer (10) accounts for protocol and special characters like ://, port colon, and initial slash etc
+       approxUrlLength = 10 + Buffer.byteLength(this.options.host) + (this.options.port+"").length + Buffer.byteLength(fullPath); // Buffer (10) accounts for protocol and special characters like ://, port colon, and initial slash etc
 
-   if (approxUrlLength <= this.options.get_max_request_entity_size) {
+   if (this.options.get_max_request_entity_size === false || approxUrlLength <= this.options.get_max_request_entity_size) {
       var params = {
          host: this.options.host,
          port: this.options.port,