ARM mbed M2X API Client: The ARM mbed client library is used to send/receive data to/from AT&T's M2X service from mbed LPC1768 microcontrollers.
Dependents: m2x-demo-all M2X_MTS_ACCEL_DEMO M2X_MTS_Accel M2X_K64F_ACCEL ... more
M2XStreamClient.cpp@14:205076b587fe, 2015-01-04 (annotated)
- Committer:
- NetArc
- Date:
- Sun Jan 04 05:26:33 2015 +0000
- Revision:
- 14:205076b587fe
- Parent:
- 13:0d574742208f
- Child:
- 16:7903152de19f
Added support for path prefix for app-flow
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
jb8414 | 0:f479e4f4db0e | 1 | #include "M2XStreamClient.h" |
jb8414 | 0:f479e4f4db0e | 2 | |
jb8414 | 0:f479e4f4db0e | 3 | #include <jsonlite.h> |
jb8414 | 0:f479e4f4db0e | 4 | |
jb8414 | 0:f479e4f4db0e | 5 | #include "StreamParseFunctions.h" |
jb8414 | 0:f479e4f4db0e | 6 | #include "LocationParseFunctions.h" |
jb8414 | 0:f479e4f4db0e | 7 | |
jb8414 | 0:f479e4f4db0e | 8 | const char* M2XStreamClient::kDefaultM2XHost = "api-m2x.att.com"; |
jb8414 | 0:f479e4f4db0e | 9 | |
citrusbyte | 10:4ce9eba38dbe | 10 | static int write_delete_values(Print* print, const char* from, const char* end); |
jb8414 | 0:f479e4f4db0e | 11 | int print_encoded_string(Print* print, const char* str); |
jb8414 | 0:f479e4f4db0e | 12 | int tolower(int ch); |
jb8414 | 0:f479e4f4db0e | 13 | |
jb8414 | 0:f479e4f4db0e | 14 | #if defined(ARDUINO_PLATFORM) || defined(MBED_PLATFORM) |
jb8414 | 0:f479e4f4db0e | 15 | int tolower(int ch) |
jb8414 | 0:f479e4f4db0e | 16 | { |
jb8414 | 0:f479e4f4db0e | 17 | // Arduino and mbed use ASCII table, so we can simplify the implementation |
jb8414 | 0:f479e4f4db0e | 18 | if ((ch >= 'A') && (ch <= 'Z')) { |
jb8414 | 0:f479e4f4db0e | 19 | return (ch + 32); |
jb8414 | 0:f479e4f4db0e | 20 | } |
jb8414 | 0:f479e4f4db0e | 21 | return ch; |
jb8414 | 0:f479e4f4db0e | 22 | } |
jb8414 | 0:f479e4f4db0e | 23 | #else |
jb8414 | 0:f479e4f4db0e | 24 | // For other platform, we use libc's tolower by default |
jb8414 | 0:f479e4f4db0e | 25 | #include <ctype.h> |
jb8414 | 0:f479e4f4db0e | 26 | #endif |
jb8414 | 0:f479e4f4db0e | 27 | |
jb8414 | 0:f479e4f4db0e | 28 | M2XStreamClient::M2XStreamClient(Client* client, |
jb8414 | 0:f479e4f4db0e | 29 | const char* key, |
jb8414 | 0:f479e4f4db0e | 30 | int case_insensitive, |
jb8414 | 0:f479e4f4db0e | 31 | const char* host, |
NetArc | 14:205076b587fe | 32 | int port, |
NetArc | 14:205076b587fe | 33 | const char* path_prefix) : _client(client), |
jb8414 | 0:f479e4f4db0e | 34 | _key(key), |
jb8414 | 0:f479e4f4db0e | 35 | _case_insensitive(case_insensitive), |
jb8414 | 0:f479e4f4db0e | 36 | _host(host), |
jb8414 | 0:f479e4f4db0e | 37 | _port(port), |
NetArc | 14:205076b587fe | 38 | _path_prefix(path_prefix), |
jb8414 | 0:f479e4f4db0e | 39 | _null_print() { |
jb8414 | 0:f479e4f4db0e | 40 | } |
jb8414 | 0:f479e4f4db0e | 41 | |
citrusbyte | 13:0d574742208f | 42 | int M2XStreamClient::listStreamValues(const char* deviceId, const char* streamName, |
citrusbyte | 13:0d574742208f | 43 | stream_value_read_callback callback, void* context, |
citrusbyte | 13:0d574742208f | 44 | const char* query) { |
jb8414 | 0:f479e4f4db0e | 45 | if (_client->connect(_host, _port)) { |
jb8414 | 0:f479e4f4db0e | 46 | DBGLN("%s", "Connected to M2X server!"); |
NetArc | 14:205076b587fe | 47 | _client->print("GET "); |
NetArc | 14:205076b587fe | 48 | if (_path_prefix) |
NetArc | 14:205076b587fe | 49 | _client->print(_path_prefix); |
NetArc | 14:205076b587fe | 50 | _client->print("/v2/devices/"); |
citrusbyte | 13:0d574742208f | 51 | print_encoded_string(_client, deviceId); |
jb8414 | 0:f479e4f4db0e | 52 | _client->print("/streams/"); |
jb8414 | 0:f479e4f4db0e | 53 | print_encoded_string(_client, streamName); |
citrusbyte | 13:0d574742208f | 54 | _client->print("/values.json"); |
jb8414 | 0:f479e4f4db0e | 55 | |
citrusbyte | 13:0d574742208f | 56 | if (query) { |
citrusbyte | 13:0d574742208f | 57 | if (query[0] != '?') { |
citrusbyte | 13:0d574742208f | 58 | _client->print('?'); |
citrusbyte | 13:0d574742208f | 59 | } |
citrusbyte | 13:0d574742208f | 60 | _client->print(query); |
citrusbyte | 13:0d574742208f | 61 | } |
jb8414 | 0:f479e4f4db0e | 62 | |
jb8414 | 0:f479e4f4db0e | 63 | _client->println(" HTTP/1.0"); |
jb8414 | 0:f479e4f4db0e | 64 | writeHttpHeader(-1); |
jb8414 | 0:f479e4f4db0e | 65 | } else { |
jb8414 | 0:f479e4f4db0e | 66 | DBGLN("%s", "ERROR: Cannot connect to M2X server!"); |
jb8414 | 0:f479e4f4db0e | 67 | return E_NOCONNECTION; |
jb8414 | 0:f479e4f4db0e | 68 | } |
jb8414 | 0:f479e4f4db0e | 69 | int status = readStatusCode(false); |
jb8414 | 0:f479e4f4db0e | 70 | if (status == 200) { |
jb8414 | 0:f479e4f4db0e | 71 | readStreamValue(callback, context); |
jb8414 | 0:f479e4f4db0e | 72 | } |
jb8414 | 0:f479e4f4db0e | 73 | |
jb8414 | 0:f479e4f4db0e | 74 | close(); |
jb8414 | 0:f479e4f4db0e | 75 | return status; |
jb8414 | 0:f479e4f4db0e | 76 | } |
jb8414 | 0:f479e4f4db0e | 77 | |
citrusbyte | 13:0d574742208f | 78 | int M2XStreamClient::readLocation(const char* deviceId, |
jb8414 | 0:f479e4f4db0e | 79 | location_read_callback callback, |
jb8414 | 0:f479e4f4db0e | 80 | void* context) { |
jb8414 | 0:f479e4f4db0e | 81 | if (_client->connect(_host, _port)) { |
jb8414 | 0:f479e4f4db0e | 82 | DBGLN("%s", "Connected to M2X server!"); |
NetArc | 14:205076b587fe | 83 | _client->print("GET "); |
NetArc | 14:205076b587fe | 84 | if (_path_prefix) |
NetArc | 14:205076b587fe | 85 | _client->print(_path_prefix); |
NetArc | 14:205076b587fe | 86 | _client->print("/v2/devices/"); |
citrusbyte | 13:0d574742208f | 87 | print_encoded_string(_client, deviceId); |
jb8414 | 0:f479e4f4db0e | 88 | _client->println("/location HTTP/1.0"); |
jb8414 | 0:f479e4f4db0e | 89 | |
jb8414 | 0:f479e4f4db0e | 90 | writeHttpHeader(-1); |
jb8414 | 0:f479e4f4db0e | 91 | } else { |
jb8414 | 0:f479e4f4db0e | 92 | DBGLN("%s", "ERROR: Cannot connect to M2X server!"); |
jb8414 | 0:f479e4f4db0e | 93 | return E_NOCONNECTION; |
jb8414 | 0:f479e4f4db0e | 94 | } |
jb8414 | 0:f479e4f4db0e | 95 | int status = readStatusCode(false); |
jb8414 | 0:f479e4f4db0e | 96 | if (status == 200) { |
jb8414 | 0:f479e4f4db0e | 97 | readLocation(callback, context); |
jb8414 | 0:f479e4f4db0e | 98 | } |
jb8414 | 0:f479e4f4db0e | 99 | |
jb8414 | 0:f479e4f4db0e | 100 | close(); |
jb8414 | 0:f479e4f4db0e | 101 | return status; |
jb8414 | 0:f479e4f4db0e | 102 | } |
jb8414 | 0:f479e4f4db0e | 103 | |
citrusbyte | 13:0d574742208f | 104 | int M2XStreamClient::deleteValues(const char* deviceId, const char* streamName, |
citrusbyte | 10:4ce9eba38dbe | 105 | const char* from, const char* end) { |
citrusbyte | 10:4ce9eba38dbe | 106 | if (_client->connect(_host, _port)) { |
citrusbyte | 10:4ce9eba38dbe | 107 | DBGLN("%s", "Connected to M2X server!"); |
citrusbyte | 10:4ce9eba38dbe | 108 | int length = write_delete_values(&_null_print, from, end); |
citrusbyte | 13:0d574742208f | 109 | writeDeleteHeader(deviceId, streamName, length); |
citrusbyte | 10:4ce9eba38dbe | 110 | write_delete_values(_client, from, end); |
citrusbyte | 10:4ce9eba38dbe | 111 | } else { |
citrusbyte | 10:4ce9eba38dbe | 112 | DBGLN("%s", "ERROR: Cannot connect to M2X server!"); |
citrusbyte | 10:4ce9eba38dbe | 113 | return E_NOCONNECTION; |
citrusbyte | 10:4ce9eba38dbe | 114 | } |
citrusbyte | 10:4ce9eba38dbe | 115 | |
citrusbyte | 10:4ce9eba38dbe | 116 | return readStatusCode(true); |
citrusbyte | 10:4ce9eba38dbe | 117 | } |
citrusbyte | 10:4ce9eba38dbe | 118 | |
citrusbyte | 10:4ce9eba38dbe | 119 | static int write_delete_values(Print* print, const char* from, |
citrusbyte | 10:4ce9eba38dbe | 120 | const char* end) { |
citrusbyte | 10:4ce9eba38dbe | 121 | int bytes = 0; |
citrusbyte | 10:4ce9eba38dbe | 122 | bytes += print->print("{\"from\":\""); |
citrusbyte | 10:4ce9eba38dbe | 123 | bytes += print->print(from); |
citrusbyte | 10:4ce9eba38dbe | 124 | bytes += print->print("\",\"end\":\""); |
citrusbyte | 10:4ce9eba38dbe | 125 | bytes += print->print(end); |
citrusbyte | 10:4ce9eba38dbe | 126 | bytes += print->print("\"}"); |
citrusbyte | 10:4ce9eba38dbe | 127 | return bytes; |
citrusbyte | 10:4ce9eba38dbe | 128 | } |
citrusbyte | 10:4ce9eba38dbe | 129 | |
jb8414 | 0:f479e4f4db0e | 130 | // Encodes and prints string using Percent-encoding specified |
jb8414 | 0:f479e4f4db0e | 131 | // in RFC 1738, Section 2.2 |
jb8414 | 0:f479e4f4db0e | 132 | int print_encoded_string(Print* print, const char* str) { |
jb8414 | 0:f479e4f4db0e | 133 | int bytes = 0; |
jb8414 | 0:f479e4f4db0e | 134 | for (int i = 0; str[i] != 0; i++) { |
jb8414 | 0:f479e4f4db0e | 135 | if (((str[i] >= 'A') && (str[i] <= 'Z')) || |
jb8414 | 0:f479e4f4db0e | 136 | ((str[i] >= 'a') && (str[i] <= 'z')) || |
jb8414 | 0:f479e4f4db0e | 137 | ((str[i] >= '0') && (str[i] <= '9')) || |
jb8414 | 0:f479e4f4db0e | 138 | (str[i] == '-') || (str[i] == '_') || |
jb8414 | 0:f479e4f4db0e | 139 | (str[i] == '.') || (str[i] == '~')) { |
jb8414 | 0:f479e4f4db0e | 140 | bytes += print->print(str[i]); |
jb8414 | 0:f479e4f4db0e | 141 | } else { |
jb8414 | 0:f479e4f4db0e | 142 | // Encode all other characters |
jb8414 | 0:f479e4f4db0e | 143 | bytes += print->print('%'); |
jb8414 | 0:f479e4f4db0e | 144 | bytes += print->print(HEX(str[i] / 16)); |
jb8414 | 0:f479e4f4db0e | 145 | bytes += print->print(HEX(str[i] % 16)); |
jb8414 | 0:f479e4f4db0e | 146 | } |
jb8414 | 0:f479e4f4db0e | 147 | } |
jb8414 | 0:f479e4f4db0e | 148 | return bytes; |
jb8414 | 0:f479e4f4db0e | 149 | } |
jb8414 | 0:f479e4f4db0e | 150 | |
citrusbyte | 13:0d574742208f | 151 | void M2XStreamClient::writePutHeader(const char* deviceId, |
citrusbyte | 10:4ce9eba38dbe | 152 | const char* streamName, |
citrusbyte | 10:4ce9eba38dbe | 153 | int contentLength) { |
NetArc | 14:205076b587fe | 154 | _client->print("PUT "); |
NetArc | 14:205076b587fe | 155 | if (_path_prefix) |
NetArc | 14:205076b587fe | 156 | _client->print(_path_prefix); |
NetArc | 14:205076b587fe | 157 | _client->print("/v2/devices/"); |
citrusbyte | 13:0d574742208f | 158 | print_encoded_string(_client, deviceId); |
jb8414 | 0:f479e4f4db0e | 159 | _client->print("/streams/"); |
jb8414 | 0:f479e4f4db0e | 160 | print_encoded_string(_client, streamName); |
citrusbyte | 11:a11af0c81cfa | 161 | _client->println("/value HTTP/1.0"); |
jb8414 | 0:f479e4f4db0e | 162 | |
jb8414 | 0:f479e4f4db0e | 163 | writeHttpHeader(contentLength); |
jb8414 | 0:f479e4f4db0e | 164 | } |
jb8414 | 0:f479e4f4db0e | 165 | |
citrusbyte | 13:0d574742208f | 166 | void M2XStreamClient::writeDeleteHeader(const char* deviceId, |
citrusbyte | 10:4ce9eba38dbe | 167 | const char* streamName, |
citrusbyte | 10:4ce9eba38dbe | 168 | int contentLength) { |
NetArc | 14:205076b587fe | 169 | _client->print("DELETE "); |
NetArc | 14:205076b587fe | 170 | if (_path_prefix) |
NetArc | 14:205076b587fe | 171 | _client->print(_path_prefix); |
NetArc | 14:205076b587fe | 172 | _client->print("/v2/devices/"); |
citrusbyte | 13:0d574742208f | 173 | print_encoded_string(_client, deviceId); |
citrusbyte | 10:4ce9eba38dbe | 174 | _client->print("/streams/"); |
citrusbyte | 10:4ce9eba38dbe | 175 | print_encoded_string(_client, streamName); |
citrusbyte | 10:4ce9eba38dbe | 176 | _client->print("/values"); |
citrusbyte | 10:4ce9eba38dbe | 177 | _client->println(" HTTP/1.0"); |
citrusbyte | 10:4ce9eba38dbe | 178 | |
citrusbyte | 10:4ce9eba38dbe | 179 | writeHttpHeader(contentLength); |
citrusbyte | 10:4ce9eba38dbe | 180 | } |
citrusbyte | 10:4ce9eba38dbe | 181 | |
jb8414 | 0:f479e4f4db0e | 182 | void M2XStreamClient::writeHttpHeader(int contentLength) { |
jb8414 | 0:f479e4f4db0e | 183 | _client->println(USER_AGENT); |
jb8414 | 0:f479e4f4db0e | 184 | _client->print("X-M2X-KEY: "); |
jb8414 | 0:f479e4f4db0e | 185 | _client->println(_key); |
jb8414 | 0:f479e4f4db0e | 186 | |
jb8414 | 0:f479e4f4db0e | 187 | _client->print("Host: "); |
jb8414 | 0:f479e4f4db0e | 188 | print_encoded_string(_client, _host); |
jb8414 | 0:f479e4f4db0e | 189 | if (_port != kDefaultM2XPort) { |
jb8414 | 0:f479e4f4db0e | 190 | _client->print(":"); |
jb8414 | 0:f479e4f4db0e | 191 | // port is an integer, does not need encoding |
jb8414 | 0:f479e4f4db0e | 192 | _client->print(_port); |
jb8414 | 0:f479e4f4db0e | 193 | } |
jb8414 | 0:f479e4f4db0e | 194 | _client->println(); |
jb8414 | 0:f479e4f4db0e | 195 | |
jb8414 | 0:f479e4f4db0e | 196 | if (contentLength > 0) { |
jb8414 | 0:f479e4f4db0e | 197 | _client->println("Content-Type: application/json"); |
jb8414 | 0:f479e4f4db0e | 198 | DBG("%s", "Content Length: "); |
jb8414 | 0:f479e4f4db0e | 199 | DBGLN("%d", contentLength); |
jb8414 | 0:f479e4f4db0e | 200 | |
jb8414 | 0:f479e4f4db0e | 201 | _client->print("Content-Length: "); |
jb8414 | 0:f479e4f4db0e | 202 | _client->println(contentLength); |
jb8414 | 0:f479e4f4db0e | 203 | } |
jb8414 | 0:f479e4f4db0e | 204 | _client->println(); |
jb8414 | 0:f479e4f4db0e | 205 | } |
jb8414 | 0:f479e4f4db0e | 206 | |
jb8414 | 0:f479e4f4db0e | 207 | int M2XStreamClient::waitForString(const char* str) { |
jb8414 | 0:f479e4f4db0e | 208 | int currentIndex = 0; |
jb8414 | 0:f479e4f4db0e | 209 | if (str[currentIndex] == '\0') return E_OK; |
jb8414 | 0:f479e4f4db0e | 210 | |
jb8414 | 0:f479e4f4db0e | 211 | while (true) { |
jb8414 | 0:f479e4f4db0e | 212 | while (_client->available()) { |
jb8414 | 0:f479e4f4db0e | 213 | char c = _client->read(); |
jb8414 | 0:f479e4f4db0e | 214 | DBG("%c", c); |
jb8414 | 0:f479e4f4db0e | 215 | |
jb8414 | 0:f479e4f4db0e | 216 | int cmp; |
jb8414 | 0:f479e4f4db0e | 217 | if (_case_insensitive) { |
jb8414 | 0:f479e4f4db0e | 218 | cmp = tolower(c) - tolower(str[currentIndex]); |
jb8414 | 0:f479e4f4db0e | 219 | } else { |
jb8414 | 0:f479e4f4db0e | 220 | cmp = c - str[currentIndex]; |
jb8414 | 0:f479e4f4db0e | 221 | } |
jb8414 | 0:f479e4f4db0e | 222 | |
jb8414 | 0:f479e4f4db0e | 223 | if ((str[currentIndex] == '*') || (cmp == 0)) { |
jb8414 | 0:f479e4f4db0e | 224 | currentIndex++; |
jb8414 | 0:f479e4f4db0e | 225 | if (str[currentIndex] == '\0') { |
jb8414 | 0:f479e4f4db0e | 226 | return E_OK; |
jb8414 | 0:f479e4f4db0e | 227 | } |
jb8414 | 0:f479e4f4db0e | 228 | } else { |
jb8414 | 0:f479e4f4db0e | 229 | // start from the beginning |
jb8414 | 0:f479e4f4db0e | 230 | currentIndex = 0; |
jb8414 | 0:f479e4f4db0e | 231 | } |
jb8414 | 0:f479e4f4db0e | 232 | } |
jb8414 | 0:f479e4f4db0e | 233 | |
jb8414 | 0:f479e4f4db0e | 234 | if (!_client->connected()) { |
jb8414 | 0:f479e4f4db0e | 235 | DBGLN("%s", "ERROR: The client is disconnected from the server!"); |
jb8414 | 0:f479e4f4db0e | 236 | |
jb8414 | 0:f479e4f4db0e | 237 | close(); |
jb8414 | 0:f479e4f4db0e | 238 | return E_DISCONNECTED; |
jb8414 | 0:f479e4f4db0e | 239 | } |
jb8414 | 0:f479e4f4db0e | 240 | |
jb8414 | 0:f479e4f4db0e | 241 | delay(1000); |
jb8414 | 0:f479e4f4db0e | 242 | } |
jb8414 | 0:f479e4f4db0e | 243 | // never reached here |
jb8414 | 0:f479e4f4db0e | 244 | return E_NOTREACHABLE; |
jb8414 | 0:f479e4f4db0e | 245 | } |
jb8414 | 0:f479e4f4db0e | 246 | |
jb8414 | 0:f479e4f4db0e | 247 | int M2XStreamClient::readStatusCode(bool closeClient) { |
jb8414 | 0:f479e4f4db0e | 248 | int responseCode = 0; |
jb8414 | 0:f479e4f4db0e | 249 | int ret = waitForString("HTTP/*.* "); |
jb8414 | 0:f479e4f4db0e | 250 | if (ret != E_OK) { |
jb8414 | 0:f479e4f4db0e | 251 | if (closeClient) close(); |
jb8414 | 0:f479e4f4db0e | 252 | return ret; |
jb8414 | 0:f479e4f4db0e | 253 | } |
jb8414 | 0:f479e4f4db0e | 254 | |
jb8414 | 0:f479e4f4db0e | 255 | // ret is not needed from here(since it must be E_OK), so we can use it |
jb8414 | 0:f479e4f4db0e | 256 | // as a regular variable now. |
jb8414 | 0:f479e4f4db0e | 257 | ret = 0; |
jb8414 | 0:f479e4f4db0e | 258 | while (true) { |
jb8414 | 0:f479e4f4db0e | 259 | while (_client->available()) { |
jb8414 | 0:f479e4f4db0e | 260 | char c = _client->read(); |
jb8414 | 0:f479e4f4db0e | 261 | DBG("%c", c); |
jb8414 | 0:f479e4f4db0e | 262 | |
jb8414 | 0:f479e4f4db0e | 263 | responseCode = responseCode * 10 + (c - '0'); |
jb8414 | 0:f479e4f4db0e | 264 | ret++; |
jb8414 | 0:f479e4f4db0e | 265 | if (ret == 3) { |
jb8414 | 0:f479e4f4db0e | 266 | if (closeClient) close(); |
jb8414 | 0:f479e4f4db0e | 267 | return responseCode; |
jb8414 | 0:f479e4f4db0e | 268 | } |
jb8414 | 0:f479e4f4db0e | 269 | } |
jb8414 | 0:f479e4f4db0e | 270 | |
jb8414 | 0:f479e4f4db0e | 271 | if (!_client->connected()) { |
jb8414 | 0:f479e4f4db0e | 272 | DBGLN("%s", "ERROR: The client is disconnected from the server!"); |
jb8414 | 0:f479e4f4db0e | 273 | |
jb8414 | 0:f479e4f4db0e | 274 | if (closeClient) close(); |
jb8414 | 0:f479e4f4db0e | 275 | return E_DISCONNECTED; |
jb8414 | 0:f479e4f4db0e | 276 | } |
jb8414 | 0:f479e4f4db0e | 277 | |
jb8414 | 0:f479e4f4db0e | 278 | delay(1000); |
jb8414 | 0:f479e4f4db0e | 279 | } |
jb8414 | 0:f479e4f4db0e | 280 | |
jb8414 | 0:f479e4f4db0e | 281 | // never reached here |
jb8414 | 0:f479e4f4db0e | 282 | return E_NOTREACHABLE; |
jb8414 | 0:f479e4f4db0e | 283 | } |
jb8414 | 0:f479e4f4db0e | 284 | |
jb8414 | 0:f479e4f4db0e | 285 | int M2XStreamClient::readContentLength() { |
jb8414 | 0:f479e4f4db0e | 286 | int ret = waitForString("Content-Length: "); |
jb8414 | 0:f479e4f4db0e | 287 | if (ret != E_OK) { |
jb8414 | 0:f479e4f4db0e | 288 | return ret; |
jb8414 | 0:f479e4f4db0e | 289 | } |
jb8414 | 0:f479e4f4db0e | 290 | |
jb8414 | 0:f479e4f4db0e | 291 | // From now on, ret is not needed, we can use it |
jb8414 | 0:f479e4f4db0e | 292 | // to keep the final result |
jb8414 | 0:f479e4f4db0e | 293 | ret = 0; |
jb8414 | 0:f479e4f4db0e | 294 | while (true) { |
jb8414 | 0:f479e4f4db0e | 295 | while (_client->available()) { |
jb8414 | 0:f479e4f4db0e | 296 | char c = _client->read(); |
jb8414 | 0:f479e4f4db0e | 297 | DBG("%c", c); |
jb8414 | 0:f479e4f4db0e | 298 | |
jb8414 | 0:f479e4f4db0e | 299 | if ((c == '\r') || (c == '\n')) { |
jb8414 | 0:f479e4f4db0e | 300 | return (ret == 0) ? (E_INVALID) : (ret); |
jb8414 | 0:f479e4f4db0e | 301 | } else { |
jb8414 | 0:f479e4f4db0e | 302 | ret = ret * 10 + (c - '0'); |
jb8414 | 0:f479e4f4db0e | 303 | } |
jb8414 | 0:f479e4f4db0e | 304 | } |
jb8414 | 0:f479e4f4db0e | 305 | |
jb8414 | 0:f479e4f4db0e | 306 | if (!_client->connected()) { |
jb8414 | 0:f479e4f4db0e | 307 | DBGLN("%s", "ERROR: The client is disconnected from the server!"); |
jb8414 | 0:f479e4f4db0e | 308 | |
jb8414 | 0:f479e4f4db0e | 309 | return E_DISCONNECTED; |
jb8414 | 0:f479e4f4db0e | 310 | } |
jb8414 | 0:f479e4f4db0e | 311 | |
jb8414 | 0:f479e4f4db0e | 312 | delay(1000); |
jb8414 | 0:f479e4f4db0e | 313 | } |
jb8414 | 0:f479e4f4db0e | 314 | |
jb8414 | 0:f479e4f4db0e | 315 | // never reached here |
jb8414 | 0:f479e4f4db0e | 316 | return E_NOTREACHABLE; |
jb8414 | 0:f479e4f4db0e | 317 | } |
jb8414 | 0:f479e4f4db0e | 318 | |
jb8414 | 0:f479e4f4db0e | 319 | int M2XStreamClient::skipHttpHeader() { |
jb8414 | 0:f479e4f4db0e | 320 | return waitForString("\r\n\r\n"); |
jb8414 | 0:f479e4f4db0e | 321 | } |
jb8414 | 0:f479e4f4db0e | 322 | |
jb8414 | 0:f479e4f4db0e | 323 | void M2XStreamClient::close() { |
jb8414 | 0:f479e4f4db0e | 324 | // Eats up buffered data before closing |
jb8414 | 0:f479e4f4db0e | 325 | _client->flush(); |
jb8414 | 0:f479e4f4db0e | 326 | _client->stop(); |
jb8414 | 0:f479e4f4db0e | 327 | } |
jb8414 | 0:f479e4f4db0e | 328 | |
jb8414 | 0:f479e4f4db0e | 329 | int M2XStreamClient::readStreamValue(stream_value_read_callback callback, |
jb8414 | 0:f479e4f4db0e | 330 | void* context) { |
NetArc | 2:7ea7ab05f120 | 331 | const int BUF_LEN = 64; |
jb8414 | 0:f479e4f4db0e | 332 | char buf[BUF_LEN]; |
jb8414 | 0:f479e4f4db0e | 333 | |
jb8414 | 0:f479e4f4db0e | 334 | int length = readContentLength(); |
jb8414 | 0:f479e4f4db0e | 335 | if (length < 0) { |
jb8414 | 0:f479e4f4db0e | 336 | close(); |
jb8414 | 0:f479e4f4db0e | 337 | return length; |
jb8414 | 0:f479e4f4db0e | 338 | } |
jb8414 | 0:f479e4f4db0e | 339 | |
jb8414 | 0:f479e4f4db0e | 340 | int index = skipHttpHeader(); |
jb8414 | 0:f479e4f4db0e | 341 | if (index != E_OK) { |
jb8414 | 0:f479e4f4db0e | 342 | close(); |
jb8414 | 0:f479e4f4db0e | 343 | return index; |
jb8414 | 0:f479e4f4db0e | 344 | } |
jb8414 | 0:f479e4f4db0e | 345 | index = 0; |
jb8414 | 0:f479e4f4db0e | 346 | |
jb8414 | 0:f479e4f4db0e | 347 | stream_parsing_context_state state; |
jb8414 | 0:f479e4f4db0e | 348 | state.state = state.index = 0; |
jb8414 | 0:f479e4f4db0e | 349 | state.callback = callback; |
jb8414 | 0:f479e4f4db0e | 350 | state.context = context; |
jb8414 | 0:f479e4f4db0e | 351 | |
jb8414 | 0:f479e4f4db0e | 352 | jsonlite_parser_callbacks cbs = jsonlite_default_callbacks; |
jb8414 | 0:f479e4f4db0e | 353 | cbs.key_found = on_stream_key_found; |
citrusbyte | 10:4ce9eba38dbe | 354 | cbs.number_found = on_stream_number_found; |
jb8414 | 0:f479e4f4db0e | 355 | cbs.string_found = on_stream_string_found; |
jb8414 | 0:f479e4f4db0e | 356 | cbs.context.client_state = &state; |
jb8414 | 0:f479e4f4db0e | 357 | |
jb8414 | 0:f479e4f4db0e | 358 | jsonlite_parser p = jsonlite_parser_init(jsonlite_parser_estimate_size(5)); |
jb8414 | 0:f479e4f4db0e | 359 | jsonlite_parser_set_callback(p, &cbs); |
jb8414 | 0:f479e4f4db0e | 360 | |
jb8414 | 0:f479e4f4db0e | 361 | jsonlite_result result = jsonlite_result_unknown; |
jb8414 | 0:f479e4f4db0e | 362 | while (index < length) { |
jb8414 | 0:f479e4f4db0e | 363 | int i = 0; |
citrusbyte | 10:4ce9eba38dbe | 364 | |
jb8414 | 0:f479e4f4db0e | 365 | DBG("%s", "Received Data: "); |
jb8414 | 0:f479e4f4db0e | 366 | while ((i < BUF_LEN) && _client->available()) { |
jb8414 | 0:f479e4f4db0e | 367 | buf[i++] = _client->read(); |
jb8414 | 0:f479e4f4db0e | 368 | DBG("%c", buf[i - 1]); |
jb8414 | 0:f479e4f4db0e | 369 | } |
jb8414 | 0:f479e4f4db0e | 370 | DBGLNEND; |
jb8414 | 0:f479e4f4db0e | 371 | |
jb8414 | 0:f479e4f4db0e | 372 | if ((!_client->connected()) && |
jb8414 | 0:f479e4f4db0e | 373 | (!_client->available()) && |
jb8414 | 0:f479e4f4db0e | 374 | ((index + i) < length)) { |
jb8414 | 0:f479e4f4db0e | 375 | jsonlite_parser_release(p); |
jb8414 | 0:f479e4f4db0e | 376 | close(); |
jb8414 | 0:f479e4f4db0e | 377 | return E_NOCONNECTION; |
jb8414 | 0:f479e4f4db0e | 378 | } |
jb8414 | 0:f479e4f4db0e | 379 | |
jb8414 | 0:f479e4f4db0e | 380 | result = jsonlite_parser_tokenize(p, buf, i); |
jb8414 | 0:f479e4f4db0e | 381 | if ((result != jsonlite_result_ok) && |
jb8414 | 0:f479e4f4db0e | 382 | (result != jsonlite_result_end_of_stream)) { |
jb8414 | 0:f479e4f4db0e | 383 | jsonlite_parser_release(p); |
jb8414 | 0:f479e4f4db0e | 384 | close(); |
jb8414 | 0:f479e4f4db0e | 385 | return E_JSON_INVALID; |
jb8414 | 0:f479e4f4db0e | 386 | } |
citrusbyte | 10:4ce9eba38dbe | 387 | |
NetArc | 4:ba0d02be2835 | 388 | index += i; |
jb8414 | 0:f479e4f4db0e | 389 | } |
jb8414 | 0:f479e4f4db0e | 390 | |
jb8414 | 0:f479e4f4db0e | 391 | jsonlite_parser_release(p); |
jb8414 | 0:f479e4f4db0e | 392 | close(); |
jb8414 | 0:f479e4f4db0e | 393 | return (result == jsonlite_result_ok) ? (E_OK) : (E_JSON_INVALID); |
jb8414 | 0:f479e4f4db0e | 394 | } |
jb8414 | 0:f479e4f4db0e | 395 | |
jb8414 | 0:f479e4f4db0e | 396 | int M2XStreamClient::readLocation(location_read_callback callback, |
jb8414 | 0:f479e4f4db0e | 397 | void* context) { |
jb8414 | 0:f479e4f4db0e | 398 | const int BUF_LEN = 40; |
jb8414 | 0:f479e4f4db0e | 399 | char buf[BUF_LEN]; |
jb8414 | 0:f479e4f4db0e | 400 | |
jb8414 | 0:f479e4f4db0e | 401 | int length = readContentLength(); |
jb8414 | 0:f479e4f4db0e | 402 | if (length < 0) { |
jb8414 | 0:f479e4f4db0e | 403 | close(); |
jb8414 | 0:f479e4f4db0e | 404 | return length; |
jb8414 | 0:f479e4f4db0e | 405 | } |
jb8414 | 0:f479e4f4db0e | 406 | |
jb8414 | 0:f479e4f4db0e | 407 | int index = skipHttpHeader(); |
jb8414 | 0:f479e4f4db0e | 408 | if (index != E_OK) { |
jb8414 | 0:f479e4f4db0e | 409 | close(); |
jb8414 | 0:f479e4f4db0e | 410 | return index; |
jb8414 | 0:f479e4f4db0e | 411 | } |
jb8414 | 0:f479e4f4db0e | 412 | index = 0; |
jb8414 | 0:f479e4f4db0e | 413 | |
jb8414 | 0:f479e4f4db0e | 414 | location_parsing_context_state state; |
jb8414 | 0:f479e4f4db0e | 415 | state.state = state.index = 0; |
jb8414 | 0:f479e4f4db0e | 416 | state.callback = callback; |
jb8414 | 0:f479e4f4db0e | 417 | state.context = context; |
jb8414 | 0:f479e4f4db0e | 418 | |
jb8414 | 0:f479e4f4db0e | 419 | jsonlite_parser_callbacks cbs = jsonlite_default_callbacks; |
jb8414 | 0:f479e4f4db0e | 420 | cbs.key_found = on_location_key_found; |
jb8414 | 0:f479e4f4db0e | 421 | cbs.string_found = on_location_string_found; |
jb8414 | 0:f479e4f4db0e | 422 | cbs.context.client_state = &state; |
jb8414 | 0:f479e4f4db0e | 423 | |
jb8414 | 0:f479e4f4db0e | 424 | jsonlite_parser p = jsonlite_parser_init(jsonlite_parser_estimate_size(5)); |
jb8414 | 0:f479e4f4db0e | 425 | jsonlite_parser_set_callback(p, &cbs); |
jb8414 | 0:f479e4f4db0e | 426 | |
jb8414 | 0:f479e4f4db0e | 427 | jsonlite_result result = jsonlite_result_unknown; |
jb8414 | 0:f479e4f4db0e | 428 | while (index < length) { |
jb8414 | 0:f479e4f4db0e | 429 | int i = 0; |
jb8414 | 0:f479e4f4db0e | 430 | |
jb8414 | 0:f479e4f4db0e | 431 | DBG("%s", "Received Data: "); |
jb8414 | 0:f479e4f4db0e | 432 | while ((i < BUF_LEN) && _client->available()) { |
jb8414 | 0:f479e4f4db0e | 433 | buf[i++] = _client->read(); |
jb8414 | 0:f479e4f4db0e | 434 | DBG("%c", buf[i - 1]); |
jb8414 | 0:f479e4f4db0e | 435 | } |
jb8414 | 0:f479e4f4db0e | 436 | DBGLNEND; |
jb8414 | 0:f479e4f4db0e | 437 | |
jb8414 | 0:f479e4f4db0e | 438 | if ((!_client->connected()) && |
jb8414 | 0:f479e4f4db0e | 439 | (!_client->available()) && |
jb8414 | 0:f479e4f4db0e | 440 | ((index + i) < length)) { |
jb8414 | 0:f479e4f4db0e | 441 | jsonlite_parser_release(p); |
jb8414 | 0:f479e4f4db0e | 442 | close(); |
jb8414 | 0:f479e4f4db0e | 443 | return E_NOCONNECTION; |
jb8414 | 0:f479e4f4db0e | 444 | } |
jb8414 | 0:f479e4f4db0e | 445 | |
jb8414 | 0:f479e4f4db0e | 446 | result = jsonlite_parser_tokenize(p, buf, i); |
jb8414 | 0:f479e4f4db0e | 447 | if ((result != jsonlite_result_ok) && |
jb8414 | 0:f479e4f4db0e | 448 | (result != jsonlite_result_end_of_stream)) { |
jb8414 | 0:f479e4f4db0e | 449 | jsonlite_parser_release(p); |
jb8414 | 0:f479e4f4db0e | 450 | close(); |
jb8414 | 0:f479e4f4db0e | 451 | return E_JSON_INVALID; |
jb8414 | 0:f479e4f4db0e | 452 | } |
jb8414 | 0:f479e4f4db0e | 453 | |
jb8414 | 0:f479e4f4db0e | 454 | index += i; |
jb8414 | 0:f479e4f4db0e | 455 | } |
jb8414 | 0:f479e4f4db0e | 456 | |
jb8414 | 0:f479e4f4db0e | 457 | jsonlite_parser_release(p); |
jb8414 | 0:f479e4f4db0e | 458 | close(); |
jb8414 | 0:f479e4f4db0e | 459 | return (result == jsonlite_result_ok) ? (E_OK) : (E_JSON_INVALID); |
jb8414 | 0:f479e4f4db0e | 460 | } |