I'm trying to take out from AWS respond needed information. Here is cut off part of example respond:

...
                    <instanceId>i-xxxxx</instanceId>
                    <imageId>ami-xxxxx</imageId>
                    <instanceState>
                        <code>16</code>
                        <name>running</name>
                    </instanceState>
                    <privateDnsName>ip-xxxxxxx.ec2.internal</privateDnsName>
                    <dnsName>ec2-xxxxxx.compute-1.amazonaws.com</dnsName>
                    <reason/>
                    <keyName>ec2key</keyName>
                    <amiLaunchIndex>0</amiLaunchIndex>
                    <productCodes>
                        <item>
                            <productCode>xxxxxxxxxxxxxxxxxxxx</productCode>
                            <type>marketplace</type>
                        </item>
                    </productCodes>
                    <instanceType>c3.large</instanceType>
                    <launchTime>2015-08-18T16:51:11.000Z</launchTime>
...

With such code im getting only information about all instance ids:

    string xmlstring = cast(string)read("test.xml");
    XmlNode newdoc = xmlstring.readDocument();
    XmlNode[]  searchlist = newdoc.parseXPath("//instanceId");
    writeln(searchlist);

What i need is that to take out from there instance id and eg LaunchTime for that instance. How can i do it using kxml?

Why there is needed that "//" before tag? In other way im not getting any respond. What is interesting when i do that same with first tag appearing in respond it is not needed. From other hand with "///" i'm getting much more information but not separated by coma.

How to drop tags from respond? I have such result of parsing by id tag:

<instanceId>i-xxxxxx</instanceId>

I need only value. Is there some equivalent to ".text" from std.xml?

On Monday, 19 October 2015 at 04:49:25 UTC, holo wrote:
> Why there is needed that "//" before tag?

That's an XPath expression.

> How to drop tags from respond? I have such result of parsing by id tag:
>
> <instanceId>i-xxxxxx</instanceId>
>
> I need only value. Is there some equivalent to ".text" from std.xml?

Try getCData https://github.com/opticron/kxml/blob/master/source/kxml/xml.d#L309

On Monday, 19 October 2015 at 11:53:08 UTC, Kagamin wrote:
> On Monday, 19 October 2015 at 04:49:25 UTC, holo wrote:
>> Why there is needed that "//" before tag?
>
> That's an XPath expression.
>

Need, to read about that XPaths.


>> How to drop tags from respond? I have such result of parsing by id tag:
>>
>> <instanceId>i-xxxxxx</instanceId>
>>
>> I need only value. Is there some equivalent to ".text" from std.xml?
>
> Try getCData https://github.com/opticron/kxml/blob/master/source/kxml/xml.d#L309


getCData is working like expected.

Thank you for tips.

Sorry i was trying to use that XPaths to take out instanceId and laounchTime but i always get an empty respond.

//instanceId/launchTime" - empty
//instanceId/*           - empty too
//instanceId.launchTime  - empty too

How to take instance id and variable which im interest in or few/all for instanceId?

Select parent tags and get data from their child tags like instanceId.

On Monday, 19 October 2015 at 12:54:52 UTC, Kagamin wrote:
> Select parent tags and get data from their child tags like instanceId.

void main()
{
    string xmlstring = cast(string)read("test.xml");
    XmlNode newdoc = xmlstring.readDocument();
    XmlNode[]  searchlist = newdoc.parseXPath("//instanceId");
    XmlNode[] searchlist2 = searchlist.parseXPath("//launchTime");
        writeln(searchlist2);
}

Not working but probably its not what you thought, how to select it do you have some example?

If you don't want parent tag, then:
XmlNode[] searchlist2 = newdoc.parseXPath("//launchTime");

On Monday, 19 October 2015 at 16:12:56 UTC, Kagamin wrote:
> If you don't want parent tag, then:
> XmlNode[] searchlist2 = newdoc.parseXPath("//launchTime");

I wanted parent tag, i think. I almost figure out what i needed, but getCData stops working :/

void main()
{
    string xmlstring = cast(string)read("test.xml");
    XmlNode newdoc = xmlstring.readDocument();
    XmlNode[]  searchlist = newdoc.parseXPath("//instancesSet/item");

    foreach(list, searchlist)
    {
    string test = list.parseXPath("instanceId").getCData();
    writeln(test);
    }
}

[holo@ultraxps test]$ dub
Performing "debug" build using dmd for x86_64.
kxml 1.0.0: target for configuration "library" is up to date.
test ~master: building configuration "application"...
source/app.d(20,57): Error: no property 'getCData' for type 'XmlNode[]'
dmd failed with exit code 1.
[holo@ultraxps test]$

I have no idea what i'm doing, but i did it (i just choose 1 element of array):

void main()
{
    string xmlstring = cast(string)read("test.xml");
    XmlNode newdoc = xmlstring.readDocument();

    XmlNode[]  searchlist = newdoc.parseXPath(`//instancesSet/item`);
    foreach(list; searchlist)
    {
        string test1 = list.parseXPath(`//instanceId`)[0].getCData;

        writeln(test1);
    }

}

Is it really how it should looks like? Is there any better/more beautiful solution?

You can write a helper:
XmlNode selectSingleNode(XmlNode src, string path)
{
  XmlNode[] nodes = src.parseXPath(path);
  return nodes.length==0 ? null : nodes[0];
}

Then:
string test1 = node.selectSingleNode(`//instanceId`).getCData();