Xinlei Cao / MbedSmartRest

Own fork of MbedSmartRest

Dependents:   MbedSmartRestMain MbedSmartRestMain

Fork of MbedSmartRest by Cumulocity Official

MbedClient.cpp@6:cd7ba1ddb664, 2014-07-28 (annotated)

Committer:
Cumulocity
Date:
Mon Jul 28 12:11:02 2014 +0200
Revision:
6:cd7ba1ddb664
Parent:
2:45a6e44a4fb4
Child:
7:8159a2d12e4e
Updated from revision 908949dc5088

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Cumulocity 0:099f76422485 1 /*
Cumulocity 0:099f76422485 2 * MbedClient.cpp
Cumulocity 0:099f76422485 3 *
Cumulocity 0:099f76422485 4 * Created on: Feb 1, 2013
Cumulocity 0:099f76422485 5 * * Authors: Vincent Wochnik <v.wochnik@gmail.com>
Cumulocity 0:099f76422485 6 *
Cumulocity 0:099f76422485 7 * Copyright (c) 2013 Cumulocity GmbH
Cumulocity 0:099f76422485 8 *
Cumulocity 0:099f76422485 9 * Permission is hereby granted, free of charge, to any person obtaining
Cumulocity 0:099f76422485 10 * a copy of this software and associated documentation files (the
Cumulocity 0:099f76422485 11 * "Software"), to deal in the Software without restriction, including
Cumulocity 0:099f76422485 12 * without limitation the rights to use, copy, modify, merge, publish,
Cumulocity 0:099f76422485 13 * distribute, sublicense, and/or sell copies of the Software, and to
Cumulocity 0:099f76422485 14 * permit persons to whom the Software is furnished to do so, subject to
Cumulocity 0:099f76422485 15 * the following conditions:
Cumulocity 0:099f76422485 16 *
Cumulocity 0:099f76422485 17 * The above copyright notice and this permission notice shall be
Cumulocity 0:099f76422485 18 * included in all copies or substantial portions of the Software.
Cumulocity 0:099f76422485 19 *
Cumulocity 0:099f76422485 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
Cumulocity 0:099f76422485 21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
Cumulocity 0:099f76422485 22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
Cumulocity 0:099f76422485 23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
Cumulocity 0:099f76422485 24 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
Cumulocity 0:099f76422485 25 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
Cumulocity 0:099f76422485 26 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Cumulocity 0:099f76422485 27 */
Cumulocity 0:099f76422485 28
Cumulocity 0:099f76422485 29 #include "MbedClient.h"
Cumulocity 0:099f76422485 30 #include <stdlib.h>
Cumulocity 0:099f76422485 31 #include <string.h>
Cumulocity 0:099f76422485 32 #include "b64.h"
Cumulocity 0:099f76422485 33 #include "mbed.h"
Cumulocity 0:099f76422485 34
Cumulocity 6:cd7ba1ddb664 35 #define STATE_INIT 0
Cumulocity 6:cd7ba1ddb664 36 #define STATE_IN_REQUEST 1
Cumulocity 6:cd7ba1ddb664 37 #define STATE_SENT_ID 2
Cumulocity 6:cd7ba1ddb664 38 #define STATE_SENT_DATA 3
Cumulocity 6:cd7ba1ddb664 39 #define STATE_REQ_COMPLETE 4
Cumulocity 6:cd7ba1ddb664 40 #define STATE_RECVD_RESPONSE 5
Cumulocity 6:cd7ba1ddb664 41 #define STATE_INTERNAL_ERROR 6
Cumulocity 6:cd7ba1ddb664 42
Cumulocity 6:cd7ba1ddb664 43 MbedClient::MbedClient(const char* host, uint16_t port, uint8_t tries) :
Cumulocity 2:45a6e44a4fb4 44 _host(host),
Cumulocity 6:cd7ba1ddb664 45 _username(NULL),
Cumulocity 6:cd7ba1ddb664 46 _password(NULL),
Cumulocity 2:45a6e44a4fb4 47 _port(port),
Cumulocity 6:cd7ba1ddb664 48 _tries(tries),
Cumulocity 6:cd7ba1ddb664 49 _state(STATE_INIT),
Cumulocity 2:45a6e44a4fb4 50 _filter(_source),
Cumulocity 2:45a6e44a4fb4 51 _source(_sock),
Cumulocity 2:45a6e44a4fb4 52 _sink(_sock),
Cumulocity 2:45a6e44a4fb4 53 _sock()
Cumulocity 0:099f76422485 54 {
Cumulocity 6:cd7ba1ddb664 55 _state = STATE_INIT;
Cumulocity 0:099f76422485 56 }
Cumulocity 0:099f76422485 57
Cumulocity 0:099f76422485 58 MbedClient::~MbedClient()
Cumulocity 0:099f76422485 59 {
Cumulocity 0:099f76422485 60 }
Cumulocity 0:099f76422485 61
Cumulocity 2:45a6e44a4fb4 62 uint8_t MbedClient::setAuthorization(const char* username, const char* password)
Cumulocity 2:45a6e44a4fb4 63 {
Cumulocity 6:cd7ba1ddb664 64 if (_state != STATE_INIT)
Cumulocity 6:cd7ba1ddb664 65 return internalError();
Cumulocity 2:45a6e44a4fb4 66
Cumulocity 2:45a6e44a4fb4 67 _username = username;
Cumulocity 2:45a6e44a4fb4 68 _password = password;
Cumulocity 2:45a6e44a4fb4 69 return CLIENT_OK;
Cumulocity 2:45a6e44a4fb4 70 }
Cumulocity 2:45a6e44a4fb4 71
Cumulocity 0:099f76422485 72 uint8_t MbedClient::beginRequest()
Cumulocity 0:099f76422485 73 {
Cumulocity 6:cd7ba1ddb664 74 uint8_t tries;
Cumulocity 6:cd7ba1ddb664 75
Cumulocity 6:cd7ba1ddb664 76 if (_state != STATE_INIT)
Cumulocity 6:cd7ba1ddb664 77 return internalError();
Cumulocity 0:099f76422485 78
Cumulocity 6:cd7ba1ddb664 79 tries = _tries;
Cumulocity 6:cd7ba1ddb664 80 do {
Cumulocity 6:cd7ba1ddb664 81 if (_sock.connect(_host, _port) >= 0)
Cumulocity 6:cd7ba1ddb664 82 break;
Cumulocity 6:cd7ba1ddb664 83 _sock.close();
Cumulocity 6:cd7ba1ddb664 84 } while (--tries > 0);
Cumulocity 6:cd7ba1ddb664 85
Cumulocity 6:cd7ba1ddb664 86 if (tries == 0)
Cumulocity 6:cd7ba1ddb664 87 return connectionError();
Cumulocity 0:099f76422485 88
Cumulocity 0:099f76422485 89 if ((!send("POST /s HTTP/1.0\r\n")) ||
Cumulocity 0:099f76422485 90 (!send("Host: ")) ||
Cumulocity 0:099f76422485 91 (!send(_host)) ||
Cumulocity 0:099f76422485 92 (!send("\r\n")))
Cumulocity 6:cd7ba1ddb664 93 return connectionError();
Cumulocity 0:099f76422485 94
Cumulocity 2:45a6e44a4fb4 95 if ((_username != NULL) && (strlen(_username) > 0) &&
Cumulocity 2:45a6e44a4fb4 96 (_password != NULL) && (strlen(_password) > 0)) {
Cumulocity 0:099f76422485 97 if (!sendBasicAuth())
Cumulocity 6:cd7ba1ddb664 98 return connectionError();
Cumulocity 0:099f76422485 99 }
Cumulocity 0:099f76422485 100
Cumulocity 6:cd7ba1ddb664 101 _state = STATE_IN_REQUEST;
Cumulocity 0:099f76422485 102 return CLIENT_OK;
Cumulocity 0:099f76422485 103 }
Cumulocity 0:099f76422485 104
Cumulocity 0:099f76422485 105 uint8_t MbedClient::sendIdentifier(const char* identifier)
Cumulocity 0:099f76422485 106 {
Cumulocity 6:cd7ba1ddb664 107 if (_state != STATE_IN_REQUEST)
Cumulocity 6:cd7ba1ddb664 108 return internalError();
Cumulocity 0:099f76422485 109
Cumulocity 0:099f76422485 110 if ((identifier != NULL) && (strlen(identifier) != 0)) {
Cumulocity 0:099f76422485 111 if ((!send("X-Id: ")) ||
Cumulocity 0:099f76422485 112 (!send(identifier)) ||
Cumulocity 0:099f76422485 113 (!send("\r\n")))
Cumulocity 6:cd7ba1ddb664 114 return connectionError();
Cumulocity 0:099f76422485 115 }
Cumulocity 0:099f76422485 116
Cumulocity 6:cd7ba1ddb664 117 _state = STATE_SENT_ID;
Cumulocity 0:099f76422485 118 return CLIENT_OK;
Cumulocity 0:099f76422485 119 }
Cumulocity 0:099f76422485 120
Cumulocity 1:9a11a331e340 121 uint8_t MbedClient::sendData(const DataGenerator& generator)
Cumulocity 0:099f76422485 122 {
Cumulocity 0:099f76422485 123 size_t len; char lenstr[8];
Cumulocity 0:099f76422485 124
Cumulocity 6:cd7ba1ddb664 125 if ((_state != STATE_IN_REQUEST) && (_state != STATE_SENT_ID))
Cumulocity 6:cd7ba1ddb664 126 return internalError();
Cumulocity 0:099f76422485 127
Cumulocity 0:099f76422485 128 len = generator.writtenLength();
Cumulocity 0:099f76422485 129 snprintf(lenstr, 8, "%ld", len);
Cumulocity 0:099f76422485 130
Cumulocity 0:099f76422485 131 if ((!send("Content-Length: ")) ||
Cumulocity 0:099f76422485 132 (!send(lenstr)) ||
Cumulocity 0:099f76422485 133 (!send("\r\n\r\n")))
Cumulocity 6:cd7ba1ddb664 134 return connectionError();
Cumulocity 0:099f76422485 135
Cumulocity 6:cd7ba1ddb664 136 if (generator.writeTo(_sink) != len)
Cumulocity 6:cd7ba1ddb664 137 return connectionError();
Cumulocity 0:099f76422485 138
Cumulocity 6:cd7ba1ddb664 139 _state = STATE_SENT_DATA;
Cumulocity 0:099f76422485 140 return CLIENT_OK;
Cumulocity 0:099f76422485 141 }
Cumulocity 0:099f76422485 142
Cumulocity 0:099f76422485 143 uint8_t MbedClient::endRequest()
Cumulocity 0:099f76422485 144 {
Cumulocity 6:cd7ba1ddb664 145 if ((_state != STATE_IN_REQUEST) &&
Cumulocity 6:cd7ba1ddb664 146 (_state != STATE_SENT_ID) &&
Cumulocity 6:cd7ba1ddb664 147 (_state != STATE_SENT_DATA))
Cumulocity 6:cd7ba1ddb664 148 return internalError();
Cumulocity 0:099f76422485 149
Cumulocity 6:cd7ba1ddb664 150 if (_state != STATE_SENT_DATA) {
Cumulocity 0:099f76422485 151 // send end of headers
Cumulocity 0:099f76422485 152 if (!send("\r\n"))
Cumulocity 6:cd7ba1ddb664 153 return connectionError();
Cumulocity 0:099f76422485 154 }
Cumulocity 0:099f76422485 155
Cumulocity 6:cd7ba1ddb664 156 if (!_sink.flush())
Cumulocity 6:cd7ba1ddb664 157 return connectionError();
Cumulocity 0:099f76422485 158
Cumulocity 6:cd7ba1ddb664 159 _state = STATE_REQ_COMPLETE;
Cumulocity 0:099f76422485 160 return CLIENT_OK;
Cumulocity 0:099f76422485 161 }
Cumulocity 0:099f76422485 162
Cumulocity 0:099f76422485 163 uint8_t MbedClient::awaitResponse()
Cumulocity 0:099f76422485 164 {
Cumulocity 6:cd7ba1ddb664 165 if (_state != STATE_REQ_COMPLETE)
Cumulocity 6:cd7ba1ddb664 166 return internalError();
Cumulocity 0:099f76422485 167
Cumulocity 6:cd7ba1ddb664 168 if ((_filter.readStatus() != 200) || (!_filter.skipHeaders()))
Cumulocity 6:cd7ba1ddb664 169 return connectionError();
Cumulocity 0:099f76422485 170
Cumulocity 6:cd7ba1ddb664 171 _state = STATE_RECVD_RESPONSE;
Cumulocity 0:099f76422485 172 return CLIENT_OK;
Cumulocity 0:099f76422485 173 }
Cumulocity 0:099f76422485 174
Cumulocity 0:099f76422485 175 AbstractDataSource& MbedClient::receiveData()
Cumulocity 0:099f76422485 176 {
Cumulocity 0:099f76422485 177 return _filter;
Cumulocity 0:099f76422485 178 }
Cumulocity 0:099f76422485 179
Cumulocity 0:099f76422485 180 void MbedClient::stop()
Cumulocity 0:099f76422485 181 {
Cumulocity 0:099f76422485 182 _sock.close();
Cumulocity 0:099f76422485 183 _source.reset();
Cumulocity 0:099f76422485 184 _sink.reset();
Cumulocity 0:099f76422485 185 _filter.reset();
Cumulocity 6:cd7ba1ddb664 186 _state = STATE_INIT;
Cumulocity 0:099f76422485 187 }
Cumulocity 0:099f76422485 188
Cumulocity 0:099f76422485 189 bool MbedClient::send(const char *str)
Cumulocity 0:099f76422485 190 {
Cumulocity 6:cd7ba1ddb664 191 if (_sink.write(str) != strlen(str))
Cumulocity 0:099f76422485 192 return false;
Cumulocity 0:099f76422485 193 return true;
Cumulocity 0:099f76422485 194 }
Cumulocity 0:099f76422485 195
Cumulocity 0:099f76422485 196 bool MbedClient::sendBasicAuth()
Cumulocity 0:099f76422485 197 {
Cumulocity 0:099f76422485 198 size_t ul, pl; unsigned char input[3]; unsigned char output[5];
Cumulocity 0:099f76422485 199 int inputOffset = 0;
Cumulocity 0:099f76422485 200
Cumulocity 0:099f76422485 201 if (!send("Authorization: Basic "))
Cumulocity 0:099f76422485 202 return false;
Cumulocity 0:099f76422485 203
Cumulocity 0:099f76422485 204 ul = strlen(_username);
Cumulocity 0:099f76422485 205 pl = strlen(_password);
Cumulocity 0:099f76422485 206
Cumulocity 0:099f76422485 207 for (int i = 0; i < (ul+1+pl); i++) {
Cumulocity 0:099f76422485 208 if (i < ul)
Cumulocity 0:099f76422485 209 input[inputOffset++] = _username[i];
Cumulocity 0:099f76422485 210 else if (i == ul)
Cumulocity 0:099f76422485 211 input[inputOffset++] = ':';
Cumulocity 0:099f76422485 212 else
Cumulocity 0:099f76422485 213 input[inputOffset++] = _password[i-(ul+1)];
Cumulocity 0:099f76422485 214
Cumulocity 0:099f76422485 215 if ((inputOffset == 3) || (i == ul+pl)) {
Cumulocity 0:099f76422485 216 b64_encode(input, inputOffset, output, 4);
Cumulocity 0:099f76422485 217 output[4] = '\0';
Cumulocity 0:099f76422485 218 if (!send((char*)output))
Cumulocity 0:099f76422485 219 return false;
Cumulocity 0:099f76422485 220 inputOffset = 0;
Cumulocity 0:099f76422485 221 }
Cumulocity 0:099f76422485 222 }
Cumulocity 0:099f76422485 223
Cumulocity 0:099f76422485 224 if (!send("\r\n"))
Cumulocity 0:099f76422485 225 return false;
Cumulocity 0:099f76422485 226 return true;
Cumulocity 0:099f76422485 227 }
Cumulocity 6:cd7ba1ddb664 228
Cumulocity 6:cd7ba1ddb664 229 uint8_t MbedClient::internalError()
Cumulocity 6:cd7ba1ddb664 230 {
Cumulocity 6:cd7ba1ddb664 231 _state = STATE_INTERNAL_ERROR;
Cumulocity 6:cd7ba1ddb664 232 return CLIENT_INTERNAL_ERROR;
Cumulocity 6:cd7ba1ddb664 233 }
Cumulocity 6:cd7ba1ddb664 234
Cumulocity 6:cd7ba1ddb664 235 uint8_t MbedClient::connectionError()
Cumulocity 6:cd7ba1ddb664 236 {
Cumulocity 6:cd7ba1ddb664 237 _state = STATE_INTERNAL_ERROR;
Cumulocity 6:cd7ba1ddb664 238 return CLIENT_CONNECTION_ERROR;
Cumulocity 6:cd7ba1ddb664 239 }
Cumulocity 6:cd7ba1ddb664 240