Reusing http client.

Author: tobiasschuerg

InfluxDb.cpp

@@ -1,44 +1,53 @@
 #include "Arduino.h"
 #include "InfluxDb.h"
 
+/**
+ * Construct an InfluxDb instance.
+ * @param host the InfluxDb host
+ * @param port the InfluxDb port
+ */
 Influxdb::Influxdb(String host, uint16_t port)
 {
   _port = port;
   _host = host;
 }
 
+/**
+ * Set the database to be used.
+ */
 void Influxdb::setDb(String db)
 {
   _db = String(db);
+  // TODO: recreate client on db change
+  // http = new HTTPClient();
+  http.begin(_host, _port, "/write?db=" + _db);
+  http.addHeader("Content-Type", "text/plain");
 }
 
-// TODO: set db with user
+// TODO: set db with user & password
 
 /**
  * Send a single measurement to the InfluxDb.
- **/
+ */
 boolean Influxdb::post(InfluxData data)
 {
   return post(data.toString());
 }
 
+/**
+ * Send raw data to InfluxDb.
+ */
 boolean Influxdb::post(String data)
 {
-  Serial.print("write ");
+  Serial.print(" -> writing to " + _db + ": ");
   Serial.println(data);
 
-  // TODO: check if the client can be reused
-  HTTPClient http;
-  http.begin(_host, _port, "/write?db=" + _db);
-  http.addHeader("Content-Type", "text/plain");
-  //
-
   int httpResponseCode = http.POST(data);
-  Serial.print(" -> Response: ");
+  Serial.print(" <- Response: ");
   Serial.print(httpResponseCode);
 
   String response = http.getString();
-  Serial.println(" -> \"" + response + "\"");
+  Serial.println(" \"" + response + "\"");
 
   boolean success;
   if (httpResponseCode == 204)

InfluxDb.h

@@ -6,14 +6,15 @@
 class Influxdb
 {
 public:
-  Influxdb(String host, uint16_t port);
+  Influxdb(String host, uint16_t port = 8086);
 
   void setDb(String db);
 
   boolean post(InfluxData data);
   boolean post(String data);
 
 private:
+  HTTPClient http;
   String _host;
   uint16_t _port;
   String _db;

html/_influx_db_8h_source.html

@@ -65,12 +65,12 @@
 <div class="title">InfluxDb.h</div>  </div>
 </div><!--header-->
 <div class="contents">
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-<div class="ttc" id="class_influxdb_html_ad9993e8cfc7560872d965bae8315e9e3"><div class="ttname"><a href="class_influxdb.html#ad9993e8cfc7560872d965bae8315e9e3">Influxdb::Influxdb</a></div><div class="ttdeci">Influxdb(String host, uint16_t port)</div><div class="ttdef"><b>Definition:</b> InfluxDb.cpp:4</div></div>
-<div class="ttc" id="class_influxdb_html_aeb69ab3463eeb07b28935233d5225087"><div class="ttname"><a href="class_influxdb.html#aeb69ab3463eeb07b28935233d5225087">Influxdb::setDb</a></div><div class="ttdeci">void setDb(String db)</div><div class="ttdef"><b>Definition:</b> InfluxDb.cpp:10</div></div>
+<a href="_influx_db_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;</div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor">#include &quot;Arduino.h&quot;</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="preprocessor">#include &lt;ESP8266HTTPClient.h&gt;</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_influx_data_8h.html">InfluxData.h</a>&quot;</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;</div><div class="line"><a name="l00006"></a><span class="lineno"><a class="line" href="class_influxdb.html">    6</a></span>&#160;<span class="keyword">class </span><a class="code" href="class_influxdb.html">Influxdb</a></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;{</div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;  <a class="code" href="class_influxdb.html#ab1a58669240f294c240297e91067095c">Influxdb</a>(String host, uint16_t port = 8086);</div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;  <span class="keywordtype">void</span> <a class="code" href="class_influxdb.html#aeb69ab3463eeb07b28935233d5225087">setDb</a>(String db);</div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;</div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;  <span class="keywordtype">boolean</span> <a class="code" href="class_influxdb.html#a4e5728918ad972cf37d5140b7b73a3e6">post</a>(<a class="code" href="class_influx_data.html">InfluxData</a> data);</div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;  <span class="keywordtype">boolean</span> <a class="code" href="class_influxdb.html#a4e5728918ad972cf37d5140b7b73a3e6">post</a>(String data);</div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;  HTTPClient http;</div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;  String _host;</div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;  uint16_t _port;</div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;  String _db;</div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;};</div><div class="ttc" id="class_influxdb_html"><div class="ttname"><a href="class_influxdb.html">Influxdb</a></div><div class="ttdef"><b>Definition:</b> InfluxDb.h:6</div></div>
+<div class="ttc" id="class_influxdb_html_aeb69ab3463eeb07b28935233d5225087"><div class="ttname"><a href="class_influxdb.html#aeb69ab3463eeb07b28935233d5225087">Influxdb::setDb</a></div><div class="ttdeci">void setDb(String db)</div><div class="ttdef"><b>Definition:</b> InfluxDb.cpp:18</div></div>
 <div class="ttc" id="class_influx_data_html"><div class="ttname"><a href="class_influx_data.html">InfluxData</a></div><div class="ttdef"><b>Definition:</b> InfluxData.h:2</div></div>
-<div class="ttc" id="class_influxdb_html_a4e5728918ad972cf37d5140b7b73a3e6"><div class="ttname"><a href="class_influxdb.html#a4e5728918ad972cf37d5140b7b73a3e6">Influxdb::post</a></div><div class="ttdeci">boolean post(InfluxData data)</div><div class="ttdef"><b>Definition:</b> InfluxDb.cpp:20</div></div>
+<div class="ttc" id="class_influxdb_html_a4e5728918ad972cf37d5140b7b73a3e6"><div class="ttname"><a href="class_influxdb.html#a4e5728918ad972cf37d5140b7b73a3e6">Influxdb::post</a></div><div class="ttdeci">boolean post(InfluxData data)</div><div class="ttdef"><b>Definition:</b> InfluxDb.cpp:32</div></div>
 <div class="ttc" id="_influx_data_8h_html"><div class="ttname"><a href="_influx_data_8h.html">InfluxData.h</a></div></div>
+<div class="ttc" id="class_influxdb_html_ab1a58669240f294c240297e91067095c"><div class="ttname"><a href="class_influxdb.html#ab1a58669240f294c240297e91067095c">Influxdb::Influxdb</a></div><div class="ttdeci">Influxdb(String host, uint16_t port=8086)</div><div class="ttdef"><b>Definition:</b> InfluxDb.cpp:9</div></div>
 </div><!-- fragment --></div><!-- contents -->
 <!-- start footer part -->
 <hr class="footer"/><address class="footer"><small>

html/class_influxdb-members.html

@@ -68,7 +68,7 @@
 
 <p>This is the complete list of members for <a class="el" href="class_influxdb.html">Influxdb</a>, including all inherited members.</p>
 <table class="directory">
-  <tr class="even"><td class="entry"><a class="el" href="class_influxdb.html#ad9993e8cfc7560872d965bae8315e9e3">Influxdb</a>(String host, uint16_t port)</td><td class="entry"><a class="el" href="class_influxdb.html">Influxdb</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_influxdb.html#ab1a58669240f294c240297e91067095c">Influxdb</a>(String host, uint16_t port=8086)</td><td class="entry"><a class="el" href="class_influxdb.html">Influxdb</a></td><td class="entry"></td></tr>
   <tr><td class="entry"><a class="el" href="class_influxdb.html#a4e5728918ad972cf37d5140b7b73a3e6">post</a>(InfluxData data)</td><td class="entry"><a class="el" href="class_influxdb.html">Influxdb</a></td><td class="entry"></td></tr>
   <tr class="even"><td class="entry"><a class="el" href="class_influxdb.html#ae8c91a6245d4c5a87a50774adaa89763">post</a>(String data)</td><td class="entry"><a class="el" href="class_influxdb.html">Influxdb</a></td><td class="entry"></td></tr>
   <tr><td class="entry"><a class="el" href="class_influxdb.html#aeb69ab3463eeb07b28935233d5225087">setDb</a>(String db)</td><td class="entry"><a class="el" href="class_influxdb.html">Influxdb</a></td><td class="entry"></td></tr>

html/class_influxdb.html

@@ -73,8 +73,8 @@
 <table class="memberdecls">
 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
 Public Member Functions</h2></td></tr>
-<tr class="memitem:ad9993e8cfc7560872d965bae8315e9e3"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_influxdb.html#ad9993e8cfc7560872d965bae8315e9e3">Influxdb</a> (String host, uint16_t port)</td></tr>
-<tr class="separator:ad9993e8cfc7560872d965bae8315e9e3"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ab1a58669240f294c240297e91067095c"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_influxdb.html#ab1a58669240f294c240297e91067095c">Influxdb</a> (String host, uint16_t port=8086)</td></tr>
+<tr class="separator:ab1a58669240f294c240297e91067095c"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:aeb69ab3463eeb07b28935233d5225087"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_influxdb.html#aeb69ab3463eeb07b28935233d5225087">setDb</a> (String db)</td></tr>
 <tr class="separator:aeb69ab3463eeb07b28935233d5225087"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:a4e5728918ad972cf37d5140b7b73a3e6"><td class="memItemLeft" align="right" valign="top">boolean&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_influxdb.html#a4e5728918ad972cf37d5140b7b73a3e6">post</a> (<a class="el" href="class_influx_data.html">InfluxData</a> data)</td></tr>
@@ -83,8 +83,8 @@
 <tr class="separator:ae8c91a6245d4c5a87a50774adaa89763"><td class="memSeparator" colspan="2">&#160;</td></tr>
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 <h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
-<a id="ad9993e8cfc7560872d965bae8315e9e3"></a>
-<h2 class="memtitle"><span class="permalink"><a href="#ad9993e8cfc7560872d965bae8315e9e3">&#9670;&nbsp;</a></span>Influxdb()</h2>
+<a id="ab1a58669240f294c240297e91067095c"></a>
+<h2 class="memtitle"><span class="permalink"><a href="#ab1a58669240f294c240297e91067095c">&#9670;&nbsp;</a></span>Influxdb()</h2>
 
 <div class="memitem">
 <div class="memproto">
@@ -99,7 +99,7 @@ <h2 class="memtitle"><span class="permalink"><a href="#ad9993e8cfc7560872d965bae
           <td class="paramkey"></td>
           <td></td>
           <td class="paramtype">uint16_t&#160;</td>
-          <td class="paramname"><em>port</em>&#160;</td>
+          <td class="paramname"><em>port</em> = <code>8086</code>&#160;</td>
         </tr>
         <tr>
           <td></td>
@@ -108,6 +108,13 @@ <h2 class="memtitle"><span class="permalink"><a href="#ad9993e8cfc7560872d965bae
         </tr>
       </table>
 </div><div class="memdoc">
+<p>Construct an InfluxDb instance. </p><dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">host</td><td>the InfluxDb host </td></tr>
+    <tr><td class="paramname">port</td><td>the InfluxDb port </td></tr>
+  </table>
+  </dd>
+</dl>
 
 </div>
 </div>
@@ -146,6 +153,7 @@ <h2 class="memtitle"><span class="permalink"><a href="#ae8c91a6245d4c5a87a50774a
         </tr>
       </table>
 </div><div class="memdoc">
+<p>Send raw data to InfluxDb. </p>
 
 </div>
 </div>
@@ -164,6 +172,7 @@ <h2 class="memtitle"><span class="permalink"><a href="#aeb69ab3463eeb07b28935233
         </tr>
       </table>
 </div><div class="memdoc">
+<p>Set the database to be used. </p>
 
 </div>
 </div>

html/functions.html

@@ -72,7 +72,7 @@
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 </li>
 <li>Influxdb()
-: <a class="el" href="class_influxdb.html#ad9993e8cfc7560872d965bae8315e9e3">Influxdb</a>
+: <a class="el" href="class_influxdb.html#ab1a58669240f294c240297e91067095c">Influxdb</a>
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html/functions_func.html

@@ -72,7 +72,7 @@
 : <a class="el" href="class_influx_data.html#a5b2ad5b02681f8e94fa5c1961ae329ee">InfluxData</a>
 </li>
 <li>Influxdb()
-: <a class="el" href="class_influxdb.html#ad9993e8cfc7560872d965bae8315e9e3">Influxdb</a>
+: <a class="el" href="class_influxdb.html#ab1a58669240f294c240297e91067095c">Influxdb</a>
 </li>
 <li>post()
 : <a class="el" href="class_influxdb.html#a4e5728918ad972cf37d5140b7b73a3e6">Influxdb</a>

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