ceph/src/seastar/include/seastar/http/exception.hh

   1 /*
   2  * This file is open source software, licensed to you under the terms
   3  * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
   4  * distributed with this work for additional information regarding copyright
   5  * ownership.  You may not use this file except in compliance with the License.
   6  *
   7  * You may obtain a copy of the License at
   8  *
   9  *   http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing,
  12  * software distributed under the License is distributed on an
  13  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  14  * KIND, either express or implied.  See the License for the
  15  * specific language governing permissions and limitations
  16  * under the License.
  17  */
  18 /*
  19  * Copyright 2015 Cloudius Systems
  20  */
  21
  22 #pragma once
  23 #include <seastar/util/log.hh>
  24 #include <seastar/http/reply.hh>
  25 #include <seastar/json/json_elements.hh>
  26
  27 namespace seastar {
  28
  29 namespace httpd {
  30
  31 /**
  32  * The base_exception is a base for all http exception.
  33  * It contains a message that will be return as the message content
  34  * and a status that will be return as a status code.
  35  */
  36 class base_exception : public std::exception {
  37 public:
  38     base_exception(const std::string& msg, http::reply::status_type status)
  39             : _msg(msg), _status(status) {
  40     }
  41
  42     virtual const char* what() const throw () {
  43         return _msg.c_str();
  44     }
  45
  46     http::reply::status_type status() const {
  47         return _status;
  48     }
  49
  50     virtual const std::string& str() const {
  51         return _msg;
  52     }
  53 private:
  54     std::string _msg;
  55     http::reply::status_type _status;
  56
  57 };
  58
  59 /**
  60  * Throwing this exception will result in a redirect to the given url
  61  */
  62 class redirect_exception : public base_exception {
  63 public:
  64     redirect_exception(const std::string& url)
  65             : base_exception("", http::reply::status_type::moved_permanently), url(
  66                     url) {
  67     }
  68     std::string url;
  69 };
  70
  71 /**
  72  * Throwing this exception will result in a 404 not found result
  73  */
  74 class not_found_exception : public base_exception {
  75 public:
  76     not_found_exception(const std::string& msg = "Not found")
  77             : base_exception(msg, http::reply::status_type::not_found) {
  78     }
  79 };
  80
  81 /**
  82  * Throwing this exception will result in a 400 bad request result
  83  */
  84
  85 class bad_request_exception : public base_exception {
  86 public:
  87     bad_request_exception(const std::string& msg)
  88             : base_exception(msg, http::reply::status_type::bad_request) {
  89     }
  90 };
  91
  92 class bad_param_exception : public bad_request_exception {
  93 public:
  94     bad_param_exception(const std::string& msg)
  95             : bad_request_exception(msg) {
  96     }
  97 };
  98
  99 class missing_param_exception : public bad_request_exception {
 100 public:
 101     missing_param_exception(const std::string& param)
 102             : bad_request_exception(
 103                     std::string("Missing mandatory parameter '") + param + "'") {
 104     }
 105 };
 106
 107 class bad_chunk_exception : public bad_request_exception {
 108 public:
 109     bad_chunk_exception(const std::string& msg)
 110             : bad_request_exception(
 111                     std::string("Can't read body chunk in a 'chunked' request '") + msg + "'") {
 112     }
 113 };
 114
 115 class server_error_exception : public base_exception {
 116 public:
 117     server_error_exception(const std::string& msg)
 118             : base_exception(msg, http::reply::status_type::internal_server_error) {
 119     }
 120 };
 121
 122 class json_exception : public json::json_base {
 123 public:
 124     json::json_element<std::string> _msg;
 125     json::json_element<int> _code;
 126     void register_params() {
 127         add(&_msg, "message");
 128         add(&_code, "code");
 129     }
 130
 131     json_exception(const base_exception & e) {
 132         set(e.str(), e.status());
 133     }
 134
 135     json_exception(std::exception_ptr e) {
 136         std::ostringstream exception_description;
 137         exception_description << e;
 138         set(exception_description.str(), http::reply::status_type::internal_server_error);
 139     }
 140 private:
 141     void set(const std::string& msg, http::reply::status_type code) {
 142         register_params();
 143         _msg = msg;
 144         _code = (int) code;
 145     }
 146 };
 147
 148 }
 149
 150 }