1 | /*
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2 | ###############################################################################
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3 | #
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4 | # Temboo Arduino library
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5 | #
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6 | # Copyright 2014, Temboo Inc.
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7 | #
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8 | # Licensed under the Apache License, Version 2.0 (the "License");
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9 | # you may not use this file except in compliance with the License.
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10 | # You may obtain a copy of the License at
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11 | #
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12 | # http://www.apache.org/licenses/LICENSE-2.0
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13 | #
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14 | # Unless required by applicable law or agreed to in writing,
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15 | # software distributed under the License is distributed on an
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16 | # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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17 | # either express or implied. See the License for the specific
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18 | # language governing permissions and limitations under the License.
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19 | #
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20 | ###############################################################################
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21 | */
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22 |
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23 | #ifndef TEMBOOSESSIONCLASS_H_
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24 | #define TEMBOOSESSIONCLASS_H_
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25 |
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26 | #include <stdint.h>
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27 | #include <Arduino.h>
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28 | #include <IPAddress.h>
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29 | #include <Client.h>
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30 | #include "TembooGlobal.h"
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31 |
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32 | #ifndef TEMBOO_SEND_QUEUE_SIZE
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33 |
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34 | // Some network interfaces (i.e. ethernet or WiFi shields) can only accept
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35 | // a limited amount of data. If you try to send more than the limit, the excess
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36 | // is just lost. However, sending one character at a time is very inefficient.
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37 | // To deal with this situation, we queue up TEMBOO_SEND_QUEUE_SIZE bytes to send
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38 | // to the network device at one time. This is a compromise between RAM usage
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39 | // and performance.
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40 | #define TEMBOO_SEND_QUEUE_SIZE (32)
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41 | #endif
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42 |
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43 | class ChoreoInputSet;
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44 | class ChoreoOutputSet;
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45 | class ChoreoPreset;
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46 | class DataFormatter;
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47 |
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48 | class TembooSession {
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49 | public:
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50 |
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51 | //TembooSession constructor
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52 | //client: REQUIRED TCP/IP client object. Usually either an EthernetClient or a WiFiClient
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53 | //IPAddress: OPTIONAL IP address of the server to connect to. Usually only used for testing.
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54 | //port: OPTIONAL port number to use with the IPAddress. Usually only used for testing.
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55 | TembooSession(Client& client, IPAddress serverAddr=INADDR_NONE, uint16_t port=80);
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56 |
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57 | //executeChoreo sends a choreo execution request to the Temboo system.
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58 | // Does not wait for a response (that's a job for whoever owns the Client.)
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59 | //accountName: the name of the user's account at Temboo.
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60 | //appKeyName: the name of an application key in the user's account to use
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61 | // for this execution (analogous to a user name).
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62 | //appKeyValue: the value of the application key named in appKeyName.
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63 | // Used to authenticate the user (analogous to a password)
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64 | //path: The full path to the choreo to be executed (relative to the root of the
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65 | // user's account.)
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66 | //inputSet: the set of inputs needed by the choreo.
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67 | // May be an empty ChoreoInputSet.
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68 | //outputSet: the set of output filters to be applied to the choreo results.
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69 | // May be an empty ChoreoOutputSet
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70 | //preset: the ChoreoPreset to be used with the choreo execution.
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71 | // May be an empty ChoreoPreset.
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72 | int executeChoreo(const char* accountName,
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73 | const char* appKeyName,
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74 | const char* appKeyValue,
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75 | const char* path,
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76 | const ChoreoInputSet& inputSet,
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77 | const ChoreoOutputSet& outputSet,
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78 | const ChoreoPreset& preset);
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79 |
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80 | // setTime sets the current time in Unix timestamp format. Needed for execution request authentication.
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81 | // NOTE: This method is usually called by TembooChoreo.run() with the current time returned by
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82 | // an error response from the Temboo system, thus automatically setting the time. However, it
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83 | // MAY be called from user code if the particular board has a way of determining the current
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84 | // time in the proper format.
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85 | // currentTime: the number of seconds since 1970-01-01 00:00:00 UTC.
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86 | static void setTime(unsigned long currentTime);
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87 |
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88 | //getTime returns the current time in Unix timestamp format (seconds since 1970-01-01 00:00:00 UTC).
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89 | // Only valid after setTime has been called.
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90 | static unsigned long getTime();
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91 |
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92 | private:
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93 | static unsigned long s_timeOffset;
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94 |
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95 | IPAddress m_addr;
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96 | uint16_t m_port;
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97 |
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98 | Client& m_client;
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99 | char m_sendQueue[TEMBOO_SEND_QUEUE_SIZE];
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100 | size_t m_sendQueueDepth;
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101 |
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102 | // calculate the authentication code value of the formatted request body
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103 | // using the salted application key value as the key.
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104 | // Returns the number of characters processed (i.e. the length of the request body)
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105 | uint16_t getAuth(DataFormatter& fmt, const char* appKeyValue, const char* salt, char* hexAuth) const;
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106 |
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107 |
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108 | // queue an entire nul-terminated char array
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109 | // from RAM followed by a newline.
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110 | void qsendln(const char* str);
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111 |
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112 | // queue an entire nul-terminated char array
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113 | // from flash memory (PROGMEM) one byte at a time,
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114 | // followed by a newline.
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115 | void qsendlnProgmem(const char* str);
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116 |
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117 | // queue an entire nul-terminated char array
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118 | // from RAM one byte at a time.
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119 | void qsend(const char*);
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120 |
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121 | // queue an entire nul-terminated char array
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122 | // from flash memory (PROGMEM) one byte at a time.
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123 | void qsendProgmem(const char*);
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124 |
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125 | // queue a single character to be sent when the queue is full.
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126 | void qsend(char);
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127 |
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128 | // send the current contents of the send queue to the client.
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129 | void qflush();
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130 |
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131 | };
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132 |
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133 | #endif
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134 |
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