XML file read

[stratus]

Is there any way to read xml files with basic4ppc;

[agraham]

Originally Posted by stratus

Is there any way to read xml files with basic4ppc;

Reading them is easy. They are just text files so open them with FileOpPen and read each line with FileRead.

Parsing them is a different matter. You will have to write that yourself!

[stratus]

Originally Posted by agraham

Reading them is easy. They are just text files so open them with FileOpPen and read each line with FileRead.

Parsing them is a different matter. You will have to write that yourself!

Yes i mean parse the xml file.

[alfcen]

Hi stratus,

Please have a look at help for the regex library.

And then at this...
http://www.regular-expressions.info/examples.html
"Grabbing HTML Tags"

This expression can be used for parsing XML tags, too.

[stratus]

Originally Posted by alfcen

Hi stratus,

Please have a look at help for the regex library.

And then at this...
http://www.regular-expressions.info/examples.html
"Grabbing HTML Tags"

This expression can be used for parsing XML tags, too.

Very useful.Thank's

[alfcen]

You are welcome. If you prefer conventional methods, data embraced in an XML tag can be parsed like this:

url = ParseXML(x, "<url>", "</url>")

Sub ParseXML(p, t1, t2)
  'Extracts a string embraced in t1 an t2 tags
  Dim l, r1, r2
  l = StrLength(t1)
  r1 = StrIndexOf(p, t1, 0)
  If r1 > 0 Then  'if the start tag is found then...
    r2 = StrIndexOf(p, t2, r1 + 1)  'look for the end tag
    p = SubString(p, r1 + l, r2 - r1 - l)  'extract the string between the tags
    Return p  'Return the wanted string
  End If	
End Sub

This would extract an URL embraced in, for example <url>http://www.server.com/</url> tags.
x is the string obtained with

FileOpen(c1,"myfile.xml")
x = FileReadToEnd (c1)
FileClose(c1)

Best luck!
Robert

[digitaldon37]

I'm writing a program that retrieves weather data from one of the web services at webservicex.net; it sends an xml stream that contains single value tags (location data) and nested tags (for weather data)

This is the web service that I'm using: WebserviceX.NET :: Web Services

An XML reader library would be helpful, but until there is one I'm trying to use the Regex library to do it.

Attached is a work-in-progress that I put together to test extracting string(s) from an XML stream. Anyone else working with XML data?

[alfcen]

Hi digitaldon37,

Thanks a lot for sharing this.

Attached please find code for global weather retrieved from the same source.
It employs only one library, namely http.dll.

Country names and cities may need to be checked against
WebserviceX.NET :: Web Services

I still prefer Wunderground's weather data, which in my believe is most
accurate, but unfortunately, not available in XML.
Example is here: alfcen - tenki

Cheers
Robert

[digitaldon37]

alfcen, thanks for the XML example. I looked at your web site and saw that you have quite a few apps written in b4ppc.