Move useful printing backend code from chrome/service/cloud_print to printing...

printing/backend/cups_helper.cc

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "printing/backend/cups_helper.h"
+
+#include "base/logging.h"
+#include "googleurl/src/gurl.h"
+
+namespace printing {
+
+// Default port for IPP print servers.
+static const int kDefaultIPPServerPort = 631;
+
+// Helper wrapper around http_t structure, with connection and cleanup
+// functionality.
+HttpConnectionCUPS::HttpConnectionCUPS(const GURL& print_server_url)
+    : http_(NULL) {
+  // If we have an empty url, use default print server.
+  if (print_server_url.is_empty())
+    return;
+
+  int port = print_server_url.IntPort();
+  if (port == url_parse::PORT_UNSPECIFIED)
+    port = kDefaultIPPServerPort;
+
+  http_ = httpConnectEncrypt(print_server_url.host().c_str(), port,
+                             HTTP_ENCRYPT_NEVER);
+  if (http_ == NULL) {
+    LOG(ERROR) << "CP_CUPS: Failed connecting to print server: " <<
+               print_server_url;
+  }
+}
+
+HttpConnectionCUPS::~HttpConnectionCUPS() {
+  if (http_ != NULL)
+    httpClose(http_);
+}
+
+http_t* HttpConnectionCUPS::http() {
+  return http_;
+}
+
+}  // namespace printing