HTTPS Post Option

Answers

• 9 Comments sorted by Votes Date Added
• Simon S

  December 2012 Vote Up2Vote Down

  Indeed, it feels weird to get an HTTP GET instead of a POST. The Twine POSTS data to the HTTP endpoint, it doesn't GET data.
• Galen Schreck

  December 2012 Vote Up0Vote Down

  Anyone consider using cosm.com (formerly Pachube)? Could use it to consolidate multiple twines/sensors into one JSON or XML feed, plus it has a pretty charting UI for your data.
  
  Would need support for PUT and auth headers for this particular API.
• Ryan Maule

  December 2012 edited December 2012 Vote Up0Vote Down

  While waiting for PUT support from Twine, I wrote a php curl script to handle receiving a single datapoint and sending it to Cosm. You'll need to register at Cosm and create a feed and datastream for this to work.
  
  If you have a php server, you can use this code and direct your HTTP GET there instead.
  
  Example: http://www.yourdomain.com/cosm/index.php?feed=#####&stream=#####&value=[temperature]
  
  <?php
  // Collect temperature and send to cosm
  $base = 'http://api.cosm.com/v2/feeds/';
  $key = 'wluWqOkcvdV2bcsAOjKPk3DIZnuSAKx2M3g5MGRrMXBvbz0g';
  $feed = $_GET['feed'];
  $stream = $_GET['stream'];
  $url = $base.$feed.'/datastreams/'.$stream.'.json?key='.$key;
  
  // Start curl
  $ch = curl_init();
  // Clean up string
  $putString = '{"current_value":"'.$_GET['value'].'","id":"'.$_GET['stream'].'"}';
  // Put string into a temporary file
  $putData = tmpfile();
  // Write the string to the temporary file
  fwrite($putData, $putString);
  // Move back to the beginning of the file
  fseek($putData, 0);
  
  // Headers
  //curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
  // Binary transfer i.e. --data-BINARY
  curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_URL, $url);
  // Using a PUT method i.e. -XPUT
  curl_setopt($ch, CURLOPT_PUT, true);
  // Instead of POST fields use these settings
  curl_setopt($ch, CURLOPT_INFILE, $putData);
  curl_setopt($ch, CURLOPT_INFILESIZE, strlen($putString));
  
  $output = curl_exec($ch);
  echo $output;
  
  // Close the file
  fclose($putData);
  // Stop curl
  curl_close($ch);
  ?>
• Ryan Maule

  December 2012 Vote Up0Vote Down

  Next go make a new Temperature rule that triggers when the Temp rises above 0 degrees, triggers after 0 seconds, and resets after 60 seconds (if you want an update every 60 seconds). I think I have those settings right. Have it post to your url and fill in the Cosm feed and datastream numbers.
• Gary Rowe

  December 2012 Vote Up0Vote Down

  Ryan, how do you get it to tell you the temperature?
  Sorry I mean the temperature value. If the rule is that it is > 0.
• Gary Rowe

  December 2012 Vote Up0Vote Down

  Ignore that. I've just read the code you posted and it makes sense.
• Jeremie KLEIN

  December 2012 Vote Up0Vote Down

  Hi Ryan
  question on your script. i tried it but it doesnt provide data to my cosm's feed. so 2 questions
  - is there a specific way to configure cosm to get those data?
  - i had a look at cosm API and i'm not sure the json url looks like the way you describe it. https://api.cosm.com/v2/feeds/xxxx/datastreams/1.json is retrieving an error even by submitting the API key behind it
  
  thanks for your help! For now I'm stuck with the lack of flexibility from my twine
  
  Jeremie
• Michael Barwell

  December 2012 Vote Up0Vote Down

  Hi Ryan,
  
  Thanks for the code - it worked well. I just did a little modification to convert the temperature to Celcius:
  
  <?php
  // Collect temperature and send to cosm
  $base = 'http://api.cosm.com/v2/feeds/';
  $key = '<COSM API KEY GOES HERE>';
  $feed = $_GET['feed'];
  $stream = $_GET['stream'];
  $url = $base.$feed.'/datastreams/'.$stream.'.json?key='.$key;
  
  $f=$_GET['value'];
  
  //Convert Fahrenheit into Celsius
  $c=intval((5/9)*($f-32));
  
  // Start curl
  $ch = curl_init();
  // Clean up string
  $putString = '{"current_value":"'.$c.'","id":"'.$_GET['stream'].'"}';
  // Put string into a temporary file
  $putData = tmpfile();
  // Write the string to the temporary file
  fwrite($putData, $putString);
  // Move back to the beginning of the file
  fseek($putData, 0);
  
  // Headers
  //curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
  // Binary transfer i.e. --data-BINARY
  curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_URL, $url);
  // Using a PUT method i.e. -XPUT
  curl_setopt($ch, CURLOPT_PUT, true);
  // Instead of POST fields use these settings
  curl_setopt($ch, CURLOPT_INFILE, $putData);
  curl_setopt($ch, CURLOPT_INFILESIZE, strlen($putString));
  
  $output = curl_exec($ch);
  echo $output;
  
  // Close the file
  fclose($putData);
  // Stop curl
  curl_close($ch);
  echo 'Update Twine Temperature to COSM feed '.$feed.' with values C='.$c.'.';
  ?>
  
  
  Thanks,
  Michael