Re: [Xsltforms-support] How to implement http-header pasing on submission?

[Kostis A. <ank...@gm...>]

Please, any help on that?

On Tue, May 11, 2010 at 7:49 PM, Kostis Anagnostopoulos
<ank...@gm...> wrote:
> Hi Alain,
>
> i saw that you incorporated the event() code i had submitted a while ago,
> so now i'm reworking it, to fix certain issues with it, such as:
> * checking  for event-context items case-insesitivly,
> * returning '' when not context items do not exist (insntead of 'undefined').
>
> Among others, i try to implement the parsing of xml-http-headers,
> as defined by chapter 11.4 [1].
>
> Therefore, given the 3 response headers below:
> ----------------
> Date: Tue, 11 May 2010 16:26:46 GMT
> Server: Apache
> Content-Type: text/html; charset=iso-8859-1
> ----------------
>
> we should return thw following nodeset:
> ----------------
> <header xmlns="">
>  <name>Date</name><value>Tue, 11 May 2010 16:26:46 GMT</value
> </header>
> <header xmlns="">
>  <name>Server</name>Apache<value></value
> </header>
> <header xmlns="">
>  <name>Content-Type</name><value>text/html; charset=iso-8859-1</value
> </header>
> ----------------
>
>
> Based on [2], I crafted the following code to parse the http-headers:
> ----------------
> /** @headers similar to the headers above */
> XFSubmission.prototype.parseHttpHeaders_ = function(headers) {
>        if (!headers)
>                return '';
>
>        var hdoc = new XDocument();
>        var nodes = [];
>        try {
>                var hlines = headers.split("\r\n");
>                for(var i in hlines) {
>                        var hline = hlines[i];
>                        if (!hline.length)
>                                continue;
>                        var hpair = hline.split(":");
>                        //alert("name="+hpair[0]+", value="+hpair[1]);
>
>                        var name = hpair[0];
>                        var value = hpair[1].replace("/^\\s*/", "");
>
>                        var hel = hdoc.createElementNS("", "header");
>                        var nel = hdoc.createElementNS("", "name");
>                        var vel = hdoc.createElementNS("", "value");
>                        var ntxt = hdoc.createTextNode(name);
>                        var vtxt = hdoc.createTextNode(value);
>
>                        nel.appendChild(ntxt);
>                        vel.appendChild(vtxt);
>
>                        hel.appendChild(nel);
>                        hel.appendChild(vel);
>
>                        hdoc.appendChild(hel);// Is it necessary?
>                        nodes.push(hel);
>                }
>        } catch(ex) {
>                DebugConsole.write("Error while parsing http-headers: " + ex);
>                hdoc = headers;
>        }
>
>        return hdoc; // should i had returned 'nodes' var instead?
> }
> ----------------
>
> Now the questions:
>
> 1. Is there i simpler way?
> (ie return an associative array?)
>
> 2) Why the above code does not work when using the XPath expressions below?
>  event('response-headers')/header[2]/name
>  event('response-headers')/header[1]/value
>  ...etc
>
> What should i change with regard to the return value of the
> parseHttpHeaders_() function?
>
> NOTE
> 1. that in the above code i diregarded completely any header-encoding issues,
> and
> 2. that i'm planning to split this function in two,
> one that parses headers to produce an associative array, to be used elsewhere
> (i.e. to decide based on the 'Content-type' whether to parse the
> response-body or not, see [2] again)
> and anotherone, that produces the xml-nodeset.
>
>
> Regards,
>  Kostis Anagnostopoulos
>
>
> [1] http://www.w3.org/TR/xforms11/#submit-evt-submit-error
> [2] http://www.w3.org/TR/XMLHttpRequest/
>