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Re: Parsing XML with a value that contains a double quote
Hi Kim,
I wouldn't use the 'WriteToFile' prototype you presented. Instead, I'd
use the 'standard' write prototype... i.e. the one included in the
IFSIO_H member that's part of HTTPAPI.
Then I'd just do this:
fd = open(embfile: O_CREAT+O_WRONLY+O_TEXTDATA);
callp write(fd: retval.valptr: retval.len);
callp close(fd);
There's no need to write an XML header if you're parsing it with Expat.
(It should already know that the data is XML) There's also no need to
call it in a loop, you should have the whole XML document already in
retval.valptr (unless I'm mistaken?)
The only thing you might consider is translating the data back to ASCII
when you write it (because HTTPAPI has translated it to EBCDIC for you.)
fd = open( embfile
: O_CREAT + O_WRONLY + O_EXCL +
O_CCSID + O_TEXTDATA + O_TEXT_CREAT
: S_IRUSR + S_IWUSR
: 819
: 0 );
callp write(fd: retval.valptr: retval.len);
callp close(fd);
That code should cause the open() API to automatically translate the
data to iso-8859-1 (CCSID 819) when it writes the data to disk. That
makes it easier when you want to open the file with Notepad or a browser
(for debugging) and means that Expat has to jump through fewer hoops
(since it doesn't understand EBCDIC directly, but does understand ASCII.)
On 12/27/2010 5:43 PM, Kim Gibson wrote:
>
> Hello again,
>
>
> I'm using a pointer to read the large amount of data being returned in
> the http_url_post_xml response. I know how to use a pointer to read
> data coming in from a file in the IFS, but what about data that simply
> resides in memory? I'm sure I'm just missing something very elementary
> here.
>
>
> Here are relevant snippets of my code:
>
>
> I've got a data structure that contains a pointer and a length:
>
>
> D value_t ds qualified
>
> D valptr *
>
> D len 10i 0
>
>
> I've altered my EndOfElement prototype definition to include the data
> structure:
>
>
> D EndOfElement PR
>
> D UserData * value
>
> D depth 10I 0 value
>
> D name 1024A varying const
>
> D path 24576A varying const
>
> D retval likeds(value_t)
>
> D attrs * dim(32767)
>
> D const options(*varsize)
>
>
>
> I'm using http_XmlReturnPtr:
>
>
> http_XmlReturnPtr(*ON);
>
>
>
> My call to the web service looks like this:
>
>
> rc = http_url_post_xml(
>
> 'https://someurl.com/services/eoservice.asmx'
>
> : %addr(SOAP)+2
>
> : %len(SOAP)
>
> : %paddr(StartOfElement)
>
> : %paddr(EndOfElement)
>
> : *NULL );
>
>
>
>
> The return tag "DeliverExamOneContentResult" contains all the
> unescaped data that I want to write to a temporary file in the IFS, so
> I can read it back in and parse it with http_parse_xml_stmf.
>
>
> P EndOfElement B
>
> D EndOfElement PI
>
> D UserData * value
>
> D depth 10I 0 value
>
> D name 1024A varying const
>
> D path 24576A varying const
>
> D retval likeds(value_t)
>
> D attrs * dim(32767)
>
> D const options(*varsize)
>
>
> D writeToFile PR 10I 0 ExtProc('write')
>
> D fildes 10i 0 value
>
> D buf 65535A const options(*varsize)
>
> D bytes 10U 0 value
>
>
> D xmlhdr s 80a varying
>
> D fd s 10i 0
>
>
> /free
>
>
> if (%trim(name)<> 'DeliverExamOneContentResult');
>
> return;
>
> endif;
>
>
> // ------------------------------------------
>
> // create new stream file in IFS
>
> // ------------------------------------------
>
>
> embfile = http_tempfile();
>
>
> // ------------------------------------------
>
> // Open stream file for appending data
>
> // and write embedded XML document to it
>
> // ------------------------------------------
>
>
> fd = open(embfile: O_WRONLY+O_TEXTDATA);
>
>
> xmlhdr= '<?xml version="1.0"?>' + x'0d25';
>
> writeToFile(fd: xmlhdr: %len(xmlhdr));
>
>
> // here's where the problem is - how to I retrieve the data from
> memory?
>
> // Whenever I use %addr(retval.valptr), I get a compile error:
>
> // The type of the parameter specified for the call does not
> match the prototype.
>
>
> dow writeToFile(fd: %addr(retval.valptr) : retval.len)>=0;
>
> writeToFile(fd: %addr(retval.valptr) : retval.len);
>
> enddo;
>
>
> callp close(fd);
>
>
>
> //endsl;
>
>
> /end-free
>
> P E
>
>
> I see that retval.valptr is a pointer and parameter buf in writeToFile
> is a character field---how do I return the data at pointer
> retval.valptr? What am I missing?
>
>
> Thanks for your help--again!
>
>
> Kim Gibson
>
>
> From: Kim Gibson
> Sent: Tuesday, December 21, 2010 3:28 PM
> To: 'ftpapi@xxxxxxxxxxxxxxxxxxxxxx'
> Subject: RE: Parsing XML with a value that contains a double quote
>
>
> Great--thanks, Scott! I knew there had to have been some cool feature.
>
>
> I appreciate your help. Have a wonderful holiday!
>
>
> Kim Gibson
>
>
>
> On 12/21/2010 2:44 PM, Kim Gibson wrote:
>
> > Any quick ideas on solutions?? I'm doing some research on this end,
>
> > and chances are the solution will be absurdly simple.
>
>
> HTTPAPI has a feature called HTTP_xmlReturnPtr() that lets HTTPAPI
>
> return the 'value' parameter from an XML document as a pointer to
>
> allocated memory. That allows the value of an XML element to exceed
>
> 65535. (Indeed, should be capable of 16mb)
>
>
> Here's a link to a previous discussion of HTTP_xmlReturnPtr:
>
> [1]http://www.scottklement.com/archives/ftpapi/201008/msg00110.html
>
>
> If you use that feature, you should be able to write all of the data
>
> from your "embedded XML" into an IFS stream file. (Which, of course,
>
> doesn't have a size limit.) and then your 2nd parse should work
> properly.
>
>
> ----------------------------------------------------------------------
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>
> This is the FTPAPI mailing list. To unsubscribe, please go to:
>
> [2]http://www.scottklement.com/mailman/listinfo/ftpapi
>
> References
>
> 1. http://www.scottklement.com/archives/ftpapi/201008/msg00110.html
> 2. http://www.scottklement.com/mailman/listinfo/ftpapi
>
>
>
>
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