Xively Official / mbed-libxively-6eca970

Xively C library

Dependents:   Application-xively-jumpstart-demo Application-xively-jumpstart-demo Modified_Xively_Jumpstart HW7-1_Xively_Thermostat

This is Xively C library, the code lives on GitHub.

See our example program and the tutorial, documentation can bee found here.

src/libxively/xively.h@0:82702e998d3f, 2013-06-26 (annotated)

Committer:
xively
Date:
Wed Jun 26 10:40:43 2013 +0000
Revision:
0:82702e998d3f
libxively v0.1.1-rc0 (34c8b32)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
xively 0:82702e998d3f 1 // Copyright (c) 2003-2013, LogMeIn, Inc. All rights reserved.
xively 0:82702e998d3f 2 // This is part of Xively C library, it is under the BSD 3-Clause license.
xively 0:82702e998d3f 3
xively 0:82702e998d3f 4 /**
xively 0:82702e998d3f 5 * \file xively.h
xively 0:82702e998d3f 6 * \brief Xively C library
xively 0:82702e998d3f 7 */
xively 0:82702e998d3f 8
xively 0:82702e998d3f 9 #ifndef __XI_H__
xively 0:82702e998d3f 10 #define __XI_H__
xively 0:82702e998d3f 11
xively 0:82702e998d3f 12 #include <stdlib.h>
xively 0:82702e998d3f 13 #include <stdint.h>
xively 0:82702e998d3f 14
xively 0:82702e998d3f 15 #include <time.h>
xively 0:82702e998d3f 16
xively 0:82702e998d3f 17 #include "comm_layer.h"
xively 0:82702e998d3f 18 #include "xi_consts.h"
xively 0:82702e998d3f 19
xively 0:82702e998d3f 20 #ifdef __cplusplus
xively 0:82702e998d3f 21 extern "C" {
xively 0:82702e998d3f 22 #endif
xively 0:82702e998d3f 23
xively 0:82702e998d3f 24 //-----------------------------------------------------------------------
xively 0:82702e998d3f 25 // TYPES AND STRUCTURES
xively 0:82702e998d3f 26 //-----------------------------------------------------------------------
xively 0:82702e998d3f 27
xively 0:82702e998d3f 28 /**
xively 0:82702e998d3f 29 * \brief The protocols currently supported by Xively
xively 0:82702e998d3f 30 * \note See source code for details of what's implemented.
xively 0:82702e998d3f 31 */
xively 0:82702e998d3f 32 typedef enum {
xively 0:82702e998d3f 33 /** `http://api.xively.com` */
xively 0:82702e998d3f 34 XI_HTTP,
xively 0:82702e998d3f 35 /** `https://api.xively.com` */
xively 0:82702e998d3f 36 XI_HTTPS,
xively 0:82702e998d3f 37 /** `telnet api.xively.com 8081` */
xively 0:82702e998d3f 38 XI_TCP,
xively 0:82702e998d3f 39 /** `openssl s_client -host api.xively.com -port 8091 -tls1` */
xively 0:82702e998d3f 40 XI_TCPS,
xively 0:82702e998d3f 41 /** `ws://api.xively.com:8080` */
xively 0:82702e998d3f 42 XI_WS,
xively 0:82702e998d3f 43 /** `wss://api.xively.com:8090` */
xively 0:82702e998d3f 44 XI_WSS,
xively 0:82702e998d3f 45 } xi_protocol_t;
xively 0:82702e998d3f 46
xively 0:82702e998d3f 47 /**
xively 0:82702e998d3f 48 * \brief _The context structure_ - it's the first agument for all functions
xively 0:82702e998d3f 49 * that communicate with Xively API (_i.e. not helpers or utilities_)
xively 0:82702e998d3f 50 */
xively 0:82702e998d3f 51 typedef struct {
xively 0:82702e998d3f 52 char *api_key; /** Xively API key */
xively 0:82702e998d3f 53 xi_protocol_t protocol; /** Xively protocol */
xively 0:82702e998d3f 54 int32_t feed_id; /** Xively feed ID */
xively 0:82702e998d3f 55 } xi_context_t;
xively 0:82702e998d3f 56
xively 0:82702e998d3f 57 /**
xively 0:82702e998d3f 58 * \brief HTTP headers
xively 0:82702e998d3f 59 */
xively 0:82702e998d3f 60 typedef enum
xively 0:82702e998d3f 61 {
xively 0:82702e998d3f 62 /** `Date` */
xively 0:82702e998d3f 63 XI_HTTP_HEADER_DATE = 0,
xively 0:82702e998d3f 64 /** `Content-Type` */
xively 0:82702e998d3f 65 XI_HTTP_HEADER_CONTENT_TYPE,
xively 0:82702e998d3f 66 /** `Content-Length` */
xively 0:82702e998d3f 67 XI_HTTP_HEADER_CONTENT_LENGTH,
xively 0:82702e998d3f 68 /** `Connection` */
xively 0:82702e998d3f 69 XI_HTTP_HEADER_CONNECTION,
xively 0:82702e998d3f 70 /** `X-Request-Id` */
xively 0:82702e998d3f 71 XI_HTTP_HEADER_X_REQUEST_ID,
xively 0:82702e998d3f 72 /** `Cache-Control` */
xively 0:82702e998d3f 73 XI_HTTP_HEADER_CACHE_CONTROL,
xively 0:82702e998d3f 74 /** `Vary` */
xively 0:82702e998d3f 75 XI_HTTP_HEADER_VARY,
xively 0:82702e998d3f 76 /** `Count` */
xively 0:82702e998d3f 77 XI_HTTP_HEADER_COUNT,
xively 0:82702e998d3f 78 /** `Age` */
xively 0:82702e998d3f 79 XI_HTTP_HEADER_AGE,
xively 0:82702e998d3f 80 // must go before the last here
xively 0:82702e998d3f 81 XI_HTTP_HEADER_UNKNOWN,
xively 0:82702e998d3f 82 // must be the last here
xively 0:82702e998d3f 83 XI_HTTP_HEADERS_COUNT
xively 0:82702e998d3f 84 } http_header_type_t;
xively 0:82702e998d3f 85
xively 0:82702e998d3f 86 /** Datapoint value types */
xively 0:82702e998d3f 87 typedef enum
xively 0:82702e998d3f 88 { /** 32-bit signed integer */
xively 0:82702e998d3f 89 XI_VALUE_TYPE_I32 = 0,
xively 0:82702e998d3f 90 /** 32-bit floating point number */
xively 0:82702e998d3f 91 XI_VALUE_TYPE_F32,
xively 0:82702e998d3f 92 /** any string-econded data */
xively 0:82702e998d3f 93 XI_VALUE_TYPE_STR,
xively 0:82702e998d3f 94 XI_VALUE_TYPE_COUNT
xively 0:82702e998d3f 95 } xi_value_type_t;
xively 0:82702e998d3f 96
xively 0:82702e998d3f 97 typedef struct {
xively 0:82702e998d3f 98 http_header_type_t header_type;
xively 0:82702e998d3f 99 char name[ XI_HTTP_HEADER_NAME_MAX_SIZE ];
xively 0:82702e998d3f 100 char value[ XI_HTTP_HEADER_VALUE_MAX_SIZE ];
xively 0:82702e998d3f 101 } http_header_t;
xively 0:82702e998d3f 102
xively 0:82702e998d3f 103 typedef struct {
xively 0:82702e998d3f 104 int http_version1;
xively 0:82702e998d3f 105 int http_version2;
xively 0:82702e998d3f 106 int http_status;
xively 0:82702e998d3f 107 char http_status_string[ XI_HTTP_STATUS_STRING_SIZE ];
xively 0:82702e998d3f 108 http_header_t* http_headers_checklist[ XI_HTTP_HEADERS_COUNT ];
xively 0:82702e998d3f 109 http_header_t http_headers[ XI_HTTP_MAX_HEADERS ];
xively 0:82702e998d3f 110 size_t http_headers_size;
xively 0:82702e998d3f 111 char http_content[ XI_HTTP_MAX_CONTENT_SIZE ];
xively 0:82702e998d3f 112 } http_response_t;
xively 0:82702e998d3f 113
xively 0:82702e998d3f 114 /**
xively 0:82702e998d3f 115 * \brief _The response structure_ - it's the return type for all functions
xively 0:82702e998d3f 116 * that communicate with Xively API (_i.e. not helpers or utilities_)
xively 0:82702e998d3f 117 */
xively 0:82702e998d3f 118 typedef struct {
xively 0:82702e998d3f 119 http_response_t http;
xively 0:82702e998d3f 120 } xi_response_t;
xively 0:82702e998d3f 121
xively 0:82702e998d3f 122 /**
xively 0:82702e998d3f 123 * \brief The datapoint value union
xively 0:82702e998d3f 124 */
xively 0:82702e998d3f 125 typedef union {
xively 0:82702e998d3f 126 int32_t i32_value;
xively 0:82702e998d3f 127 float f32_value;
xively 0:82702e998d3f 128 char str_value[ XI_VALUE_STRING_MAX_SIZE ];
xively 0:82702e998d3f 129 } xi_datapoint_value_t;
xively 0:82702e998d3f 130
xively 0:82702e998d3f 131 /**
xively 0:82702e998d3f 132 * \brief The datapoint timestamp
xively 0:82702e998d3f 133 */
xively 0:82702e998d3f 134 typedef struct {
xively 0:82702e998d3f 135 time_t timestamp;
xively 0:82702e998d3f 136 time_t micro;
xively 0:82702e998d3f 137 } xi_timestamp_t;
xively 0:82702e998d3f 138
xively 0:82702e998d3f 139 /**
xively 0:82702e998d3f 140 * \brief _Xively datapoint structure_ - it contains value and timestamp
xively 0:82702e998d3f 141 * \note A zero-valued timestamp is used by most functions as a convention
xively 0:82702e998d3f 142 * to opt for server-side timestamps.
xively 0:82702e998d3f 143 */
xively 0:82702e998d3f 144 typedef struct {
xively 0:82702e998d3f 145 xi_datapoint_value_t value;
xively 0:82702e998d3f 146 xi_value_type_t value_type;
xively 0:82702e998d3f 147 xi_timestamp_t timestamp;
xively 0:82702e998d3f 148 } xi_datapoint_t;
xively 0:82702e998d3f 149
xively 0:82702e998d3f 150 typedef struct {
xively 0:82702e998d3f 151 char datastream_id[ XI_MAX_DATASTREAM_NAME ];
xively 0:82702e998d3f 152 size_t datapoint_count;
xively 0:82702e998d3f 153 xi_datapoint_t datapoints[ XI_MAX_DATAPOINTS ];
xively 0:82702e998d3f 154 } xi_datastream_t;
xively 0:82702e998d3f 155
xively 0:82702e998d3f 156 /**
xively 0:82702e998d3f 157 * \brief _Xively feed structure_ - it contains a fixed array of datastream
xively 0:82702e998d3f 158 * \note The implementation is such that user will need to know in advance
xively 0:82702e998d3f 159 * how many datastreams there can be, which should be sufficent for
xively 0:82702e998d3f 160 * a real-world application. It's also undesired to have some devices
xively 0:82702e998d3f 161 * create dozens of datastreams due to a bug.
xively 0:82702e998d3f 162 */
xively 0:82702e998d3f 163 typedef struct {
xively 0:82702e998d3f 164 int32_t feed_id;
xively 0:82702e998d3f 165 size_t datastream_count;
xively 0:82702e998d3f 166 xi_datastream_t datastreams[ XI_MAX_DATASTREAMS ];
xively 0:82702e998d3f 167 } xi_feed_t;
xively 0:82702e998d3f 168
xively 0:82702e998d3f 169 //-----------------------------------------------------------------------
xively 0:82702e998d3f 170 // HELPER FUNCTIONS
xively 0:82702e998d3f 171 //-----------------------------------------------------------------------
xively 0:82702e998d3f 172
xively 0:82702e998d3f 173 /**
xively 0:82702e998d3f 174 * \brief Sets the xi_datapoint_t value field to `int32_t` value
xively 0:82702e998d3f 175 *
xively 0:82702e998d3f 176 * \return Pointer or `0` if an error occurred.
xively 0:82702e998d3f 177 */
xively 0:82702e998d3f 178 extern xi_datapoint_t* xi_set_value_i32( xi_datapoint_t* dp, int32_t v );
xively 0:82702e998d3f 179
xively 0:82702e998d3f 180 /**
xively 0:82702e998d3f 181 * \brief Sets the `xi_datapoint_t` value field to `float` value
xively 0:82702e998d3f 182 * \return Pointer or `0` if an error occurred.
xively 0:82702e998d3f 183 */
xively 0:82702e998d3f 184 extern xi_datapoint_t* xi_set_value_f32( xi_datapoint_t* dp, float v );
xively 0:82702e998d3f 185
xively 0:82702e998d3f 186 /**
xively 0:82702e998d3f 187 * \brief Sets the `xi_datapoint_t` value field to zero-terminated string value
xively 0:82702e998d3f 188 *
xively 0:82702e998d3f 189 * \return Pointer or `0` if an error occurred.
xively 0:82702e998d3f 190 */
xively 0:82702e998d3f 191 extern xi_datapoint_t* xi_set_value_str( xi_datapoint_t* dp, const char* v );
xively 0:82702e998d3f 192
xively 0:82702e998d3f 193 /**
xively 0:82702e998d3f 194 * \brief Sets the timeout for network operations
xively 0:82702e998d3f 195 *
xively 0:82702e998d3f 196 * \note The timeout is used by the comunication layer
xively 0:82702e998d3f 197 * to determine whenever it should treat the lag
xively 0:82702e998d3f 198 * in a connection as an error, so if your device
xively 0:82702e998d3f 199 * or your connection is slow, you can try to increase
xively 0:82702e998d3f 200 * the timeout for network operations. It only affects the
xively 0:82702e998d3f 201 * send/recv operations it does not work with connect but that
xively 0:82702e998d3f 202 * behaviour may differ between platforms and communication
xively 0:82702e998d3f 203 * layer imlementations.
xively 0:82702e998d3f 204 */
xively 0:82702e998d3f 205 extern void xi_set_network_timeout( uint32_t milliseconds );
xively 0:82702e998d3f 206
xively 0:82702e998d3f 207 /**
xively 0:82702e998d3f 208 * \brief Gets the current network timeout
xively 0:82702e998d3f 209 */
xively 0:82702e998d3f 210 extern uint32_t xi_get_network_timeout( void );
xively 0:82702e998d3f 211
xively 0:82702e998d3f 212 //-----------------------------------------------------------------------
xively 0:82702e998d3f 213 // MAIN LIBRARY FUNCTIONS
xively 0:82702e998d3f 214 //-----------------------------------------------------------------------
xively 0:82702e998d3f 215
xively 0:82702e998d3f 216 /**
xively 0:82702e998d3f 217 * \brief Library context constructor
xively 0:82702e998d3f 218 *
xively 0:82702e998d3f 219 * The purpose of this function is to allocate memory and initialise the
xively 0:82702e998d3f 220 * data structures needed in order to use any other library functions.
xively 0:82702e998d3f 221 *
xively 0:82702e998d3f 222 * \return Initialised context structure or `0` if an error occurred
xively 0:82702e998d3f 223 */
xively 0:82702e998d3f 224 extern xi_context_t* xi_create_context(
xively 0:82702e998d3f 225 xi_protocol_t protocol, const char* api_key
xively 0:82702e998d3f 226 , int32_t feed_id );
xively 0:82702e998d3f 227
xively 0:82702e998d3f 228 /**
xively 0:82702e998d3f 229 * \brief Library context destructor
xively 0:82702e998d3f 230 *
xively 0:82702e998d3f 231 * The purpose of this fucntion is to free all allocated resources
xively 0:82702e998d3f 232 * when the application is intending to terminate or stop using the library.
xively 0:82702e998d3f 233 */
xively 0:82702e998d3f 234 extern void xi_delete_context( xi_context_t* context );
xively 0:82702e998d3f 235
xively 0:82702e998d3f 236
xively 0:82702e998d3f 237 /**
xively 0:82702e998d3f 238 * \brief Update Xively feed
xively 0:82702e998d3f 239 */
xively 0:82702e998d3f 240 extern const xi_response_t* xi_feed_update(
xively 0:82702e998d3f 241 xi_context_t* xi
xively 0:82702e998d3f 242 , const xi_feed_t* value );
xively 0:82702e998d3f 243
xively 0:82702e998d3f 244 /**
xively 0:82702e998d3f 245 * \brief Retrieve Xively feed
xively 0:82702e998d3f 246 */
xively 0:82702e998d3f 247 extern const xi_response_t* xi_feed_get(
xively 0:82702e998d3f 248 xi_context_t* xi
xively 0:82702e998d3f 249 , xi_feed_t* value );
xively 0:82702e998d3f 250
xively 0:82702e998d3f 251 /**
xively 0:82702e998d3f 252 * \brief Create a datastream with given value using server timestamp
xively 0:82702e998d3f 253 */
xively 0:82702e998d3f 254 extern const xi_response_t* xi_datastream_create(
xively 0:82702e998d3f 255 xi_context_t* xi, int32_t feed_id
xively 0:82702e998d3f 256 , const char * datastream_id
xively 0:82702e998d3f 257 , const xi_datapoint_t* value);
xively 0:82702e998d3f 258
xively 0:82702e998d3f 259 /**
xively 0:82702e998d3f 260 * \brief Update a datastream with given datapoint using server or local timestamp
xively 0:82702e998d3f 261 */
xively 0:82702e998d3f 262 extern const xi_response_t* xi_datastream_update(
xively 0:82702e998d3f 263 xi_context_t* xi, int32_t feed_id
xively 0:82702e998d3f 264 , const char * datastream_id
xively 0:82702e998d3f 265 , const xi_datapoint_t* value );
xively 0:82702e998d3f 266
xively 0:82702e998d3f 267 /**
xively 0:82702e998d3f 268 * \brief Retrieve latest datapoint from a given datastream
xively 0:82702e998d3f 269 */
xively 0:82702e998d3f 270 extern const xi_response_t* xi_datastream_get(
xively 0:82702e998d3f 271 xi_context_t* xi, int32_t feed_id
xively 0:82702e998d3f 272 , const char * datastream_id, xi_datapoint_t* dp );
xively 0:82702e998d3f 273
xively 0:82702e998d3f 274 /**
xively 0:82702e998d3f 275 * \brief Delete datastream
xively 0:82702e998d3f 276 * \warning This function destroys the data in Xively and there is no way to restore it!
xively 0:82702e998d3f 277 */
xively 0:82702e998d3f 278 extern const xi_response_t* xi_datastream_delete(
xively 0:82702e998d3f 279 xi_context_t* xi, int feed_id
xively 0:82702e998d3f 280 , const char* datastream_id );
xively 0:82702e998d3f 281
xively 0:82702e998d3f 282 /**
xively 0:82702e998d3f 283 * \brief Delete datapoint at a given timestamp
xively 0:82702e998d3f 284 * \warning This function destroys the data in Xively and there is no way to restore it!
xively 0:82702e998d3f 285 * \note You need to provide exact timestamp value to guarantee successful response
xively 0:82702e998d3f 286 * from the API, i.e. it will respond with error 404 if datapoint didn't exist.
xively 0:82702e998d3f 287 * If you need to determine the exact timestamp, it may be easier to call
xively 0:82702e998d3f 288 * `xi_datapoint_delete_range()` with short range instead.
xively 0:82702e998d3f 289 */
xively 0:82702e998d3f 290 extern const xi_response_t* xi_datapoint_delete(
xively 0:82702e998d3f 291 const xi_context_t* xi, int feed_id
xively 0:82702e998d3f 292 , const char * datastream_id
xively 0:82702e998d3f 293 , const xi_datapoint_t* dp );
xively 0:82702e998d3f 294
xively 0:82702e998d3f 295 /**
xively 0:82702e998d3f 296 * \brief Delete all datapoints in given time range
xively 0:82702e998d3f 297 * \warning This function destroys the data in Xively and there is no way to restore it!
xively 0:82702e998d3f 298 */
xively 0:82702e998d3f 299 extern const xi_response_t* xi_datapoint_delete_range(
xively 0:82702e998d3f 300 const xi_context_t* xi, int feed_id, const char * datastream_id
xively 0:82702e998d3f 301 , const xi_timestamp_t* start, const xi_timestamp_t* end );
xively 0:82702e998d3f 302
xively 0:82702e998d3f 303 #ifdef __cplusplus
xively 0:82702e998d3f 304 }
xively 0:82702e998d3f 305 #endif
xively 0:82702e998d3f 306
xively 0:82702e998d3f 307 #endif // __XI_H__