ceph/src/rgw/rgw_civetweb_frontend.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #include <set>
   5 #include <string>
   6
   7 #include <boost/utility/string_ref.hpp>
   8
   9 #include "rgw_frontend.h"
  10 #include "rgw_client_io_filters.h"
  11
  12 #define dout_subsys ceph_subsys_rgw
  13
  14 static int civetweb_callback(struct mg_connection* conn)
  15 {
  16   const struct mg_request_info* const req_info = mg_get_request_info(conn);
  17   return static_cast<RGWCivetWebFrontend *>(req_info->user_data)->process(conn);
  18 }
  19
  20 int RGWCivetWebFrontend::process(struct mg_connection*  const conn)
  21 {
  22   /* Hold a read lock over access to env.store for reconfiguration. */
  23   RWLock::RLocker lock(env.mutex);
  24
  25   RGWCivetWeb cw_client(conn);
  26   auto real_client_io = rgw::io::add_reordering(
  27                           rgw::io::add_buffering(
  28                             rgw::io::add_chunking(
  29                               rgw::io::add_conlen_controlling(
  30                                 &cw_client))));
  31   RGWRestfulIO client_io(&real_client_io);
  32
  33   RGWRequest req(env.store->get_new_req_id());
  34   int ret = process_request(env.store, env.rest, &req, env.uri_prefix,
  35                             *env.auth_registry, &client_io, env.olog);
  36   if (ret < 0) {
  37     /* We don't really care about return code. */
  38     dout(20) << "process_request() returned " << ret << dendl;
  39   }
  40
  41   /* Mark as processed. */
  42   return 1;
  43 }
  44
  45 int RGWCivetWebFrontend::run()
  46 {
  47   auto& conf_map = conf->get_config_map();
  48   string port_str;
  49
  50   set_conf_default(conf_map, "num_threads",
  51                    std::to_string(g_conf->rgw_thread_pool_size));
  52   set_conf_default(conf_map, "decode_url", "no");
  53   set_conf_default(conf_map, "enable_keep_alive", "yes");
  54   set_conf_default(conf_map, "validate_http_method", "no");
  55   set_conf_default(conf_map, "canonicalize_url_path", "no");
  56   set_conf_default(conf_map, "enable_auth_domain_check", "no");
  57   conf->get_val("port", "80", &port_str);
  58   std::replace(port_str.begin(), port_str.end(), '+', ',');
  59   conf_map["listening_ports"] = port_str;
  60
  61   /* Set run_as_user. This will cause civetweb to invoke setuid() and setgid()
  62    * based on pw_uid and pw_gid obtained from pw_name. */
  63   std::string uid_string = g_ceph_context->get_set_uid_string();
  64   if (! uid_string.empty()) {
  65     conf_map["run_as_user"] = std::move(uid_string);
  66   }
  67
  68   /* Prepare options for CivetWeb. */
  69   const std::set<boost::string_ref> rgw_opts = { "port", "prefix" };
  70
  71   std::vector<const char*> options;
  72
  73   for (const auto& pair : conf_map) {
  74     if (! rgw_opts.count(pair.first)) {
  75       /* CivetWeb doesn't understand configurables of the glue layer between
  76        * it and RadosGW. We need to strip them out. Otherwise CivetWeb would
  77        * signalise an error. */
  78       options.push_back(pair.first.c_str());
  79       options.push_back(pair.second.c_str());
  80
  81       dout(20) << "civetweb config: " << pair.first
  82                << ": " << pair.second << dendl;
  83     }
  84   }
  85
  86   options.push_back(nullptr);
  87   /* Initialize the CivetWeb right now. */
  88   struct mg_callbacks cb;
  89   memset((void *)&cb, 0, sizeof(cb));
  90   cb.begin_request = civetweb_callback;
  91   cb.log_message = rgw_civetweb_log_callback;
  92   cb.log_access = rgw_civetweb_log_access_callback;
  93   ctx = mg_start(&cb, this, options.data());
  94
  95   return ! ctx ? -EIO : 0;
  96 } /* RGWCivetWebFrontend::run */