How to make html POST to IDS

billy.w.cunningham
billy.w.cunningham
in TREP APIs

Background. I have IDS server running on host padh4, port 8500. I want to request a snapshot from IDS, and filter FIDs BID and ASK.

The following works ok from the command line:

COMMAND:
curl "http://padh4:8500/ids-rest/json/quote/" -d '{"item": ["CSCO.O"],"filter": ["BID","ASK","TRDPRC_1"],"service": "IDN_RDF","token": "rharris"}'
RESULT:
{"stsCode":0,"stsTxt":"OK","result":[{"_service":"IDN_RDF","_qos":"RT0","_item":"CSCO.O","stsCode":0,"stsTxt":"OK","chainLink":[],"TRDPRC_1":"53.68","BID":"53.68","ASK":"53.69"}]}

I am trying to achieve the same result with an html page, code shown below.

<html>
<head>
<title>Form Example</title>
<script LANGUAGE="JavaScript" type="text/javascript">
function display() {
  message = "{"; 
  message += "\"item\" :"        + document.form1.item.value        + ",";
  message += "\"filter\" :"      + document.form1.filter.value      + ",";
  message += "\"service\" :"     + document.form1.service.value     + ",";
  message += "\"user\" :"        + document.form1.user.value        + ",";
  message += "\"expandChain\" :" + document.form1.expandChain.value + ",";
  message += "\"emptyLink\" :"   + document.form1.emptyLink.value   + ",";
  message += "\"chainLink\" :"   + document.form1.chainLink.value;
  message += "}";

  var form = document.createElement("form");
  form.setAttribute("method", "post");
  form.setAttribute("action", "http://padh4:8500/ids-rest/json/quote/");
  var hiddenField = document.createElement("input");
  hiddenField.setAttribute("type", "hidden");
  hiddenField.setAttribute("name", "key");
  hiddenField.setAttribute("value", message);
  form.appendChild(hiddenField);
  document.body.appendChild(form);
  form.submit();
}
</script>
</head>
<body>
<h1>Form Example</h1>
Enter the following information. When you press the Display button,
the data you entered will be displayed in a pop-up window.
<form name="form1">
<p><b>Item:</b> <input TYPE="TEXT" SIZE="20" NAME="item">
</p>
<p><b>Filter:</b> <input TYPE="TEXT" SIZE="30" NAME="filter">
</p>
<p><b>Service: </b> <input TYPE="TEXT" SIZE="15" NAME="service">
</p>
<p><b>User: </b> <input TYPE="TEXT" SIZE="15" NAME="user">
</p>
<p><b>Expand Chain: </b> <input TYPE="TEXT" SIZE="15" NAME="expandChain">
</p>
<p><b>Empty Link: </b> <input TYPE="TEXT" SIZE="15" NAME="emptyLink">
</p>
<p><b>Chain Link: </b> <input TYPE="TEXT" SIZE="15" NAME="chainLink">
</p>
<p><input TYPE="BUTTON" VALUE="Send POST" onClick="display();"></p>
</form>
</body>
</html>

This page connects to padh4 on port 8500 ok, and seems to make the POST ok. The javascript takes the form data and builds a string, which is submitted via a hidden table. However, IDS returns the following error:

{"stsCode":402,"stsTxt":"PARSE_UNICODE_ERROR"}

The chrome debugger shows my POST was submitted as the value to a variable called "key". The format is close but not correct, hence the 402 error from IDS.

image

My issue is how to get the POST correctly formatted. Do I need to JSON.stringify the message? Or build it completely manually? How to get rid of the 'key' in the response?

Thanks in advance for all help.

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Best Answer

  • billy.w.cunningham
    billy.w.cunningham
    Answer ✓

    Gurpreet, we got the answer. The file item_input.html, which comes with IDS, shows how to construct the POST message and submit it correctly. Thanks for all your help.

Answers

  • Gurpreet
    Gurpreet

    @billy.w.cunningham I don't have an IDS to test it out anymore, but it looks like that the form message you are submitting is incorrect. There are additional + in the form data and form values aren't in double quotes either.

    You are also missing the token key - which is present in the CURL command.

  • billy.w.cunningham
    billy.w.cunningham

    Thanks Gurpreet, i did change 'user' to 'token'. I still need to get rid of the +s and that should be pretty close.

  • billy.w.cunningham
    billy.w.cunningham

    This curl command works fine with IDS:

    curl "http://padh3:8500/ids-rest/json/quote/" -d '{"item": ["CSCO.O"],"filter": ["BID","ASK","TRDPRC_1"],"service": "IDN_RDF","token": "rharris"}'

    Is there a way to get this same result from an html form?

  • Gurpreet
    Gurpreet

    I'll try to create a sample form and post here.

  • Gurpreet
    Gurpreet

    Hi @billy.w.cunningham You can try the attached sample. I am not able to test it because of no access to IDS, so you might have to tweak it.

    idstest.zip

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