net/instaweb/http/wget_url_fetcher.cc

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

// Authors: jmarantz@google.com (Joshua Marantz)
//          vchudnov@google.com (Victor Chudnovsky)

#include "net/instaweb/http/public/wget_url_fetcher.h"

#include <vector>

#include "pagespeed/kernel/base/string.h"
#include "pagespeed/kernel/base/string_util.h"

namespace net_instaweb {

WgetUrlFetcher::WgetUrlFetcher() { set_binary("/usr/bin/wget"); }

const char* WgetUrlFetcher::GetFetchLabel() { return "wget"; }

GoogleString WgetUrlFetcher::ConstructFetchCommand(
    const GoogleString& escaped_url, const char* user_agent,
    const StringVector& escaped_headers) {
  GoogleString cmd(binary_);
  StrAppend(&cmd, " --save-headers -q -O -");

  // Use default user-agent if none is set in headers.
  if (user_agent == nullptr) {
    StrAppend(&cmd, " --user-agent \"", ExternalUrlFetcher::kDefaultUserAgent,
              "\"");
  }

  for (StringVector::const_iterator it = escaped_headers.begin();
       it != escaped_headers.end(); ++it) {
    StrAppend(&cmd, " --header \"", *it, "\"");
  }

  StrAppend(&cmd, " \"", escaped_url, "\"");

  return cmd;
}

}  // namespace net_instaweb