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Thread: Re: how to read and parse an xml from socket?
Re: how to read and parse an xml from socket?
user name
 2007-01-21 06:26:21 
On Sat, Jan 20, 2007 at 05:57:27PM -0800, Steve Yan wrote:
> Hi,
> 
> This may be a question asked by people before, but I
could not find answer 
> from google.

  Bad excuse: 
    http://xmlsoft.org/docs.
html

> I am trying to read out and parse XML from a socket,
which API should I 
> use? any sample code?

  There is multiple parsing APIs, tree, xmlReader or SAX,
all of them can
consume from a file descriptor, and you can build your own
I/O handlers too.

   
http://xmlsoft.org/html/libxml-parser.html#xmlReadFd
   
http://xmlsoft.org/html/libxml-parser.html#xmlReadIO
and
   http://xmlsoft.org/xmli
o.html

Daniel

P.S.: posting a completely unrelated message by replying to
an existing
      mail and changing the subject if fine if you
understand you also
      need to remove the In-Reply-To: and References:
headers, otherwise
      you just break mail threading of people using decent
email clients...
      Please don't do that !

-- 
Red Hat Virtualization group http://redhat.com/v
irtualization/
Daniel Veillard      | virtualization library  http://libvirt.org/
veillardredhat.com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ |
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Re: how to read and parse an xml from socket?
user name
 2007-01-22 17:56:38 

  


  

    Thanks a lot, Daniel.


For windows, HANDLE (and SOCKET) are defined as void *. Since the 
libxml2 takes fd (integer type) as its argument, I am using the 
following function to get fd from HANDLE:


int fd = _open_osfhandle((long)my_handle, O_RDONLY);

However, when I call libxml2 function such as:

    xmlTextReaderPtr  reader = xmlReaderForFd(fd, NULL, NULL, 
XML_PARSE_COMPACT);
   
    if (reader != NULL) {
        ret = xmlTextReaderRead(reader);
       .....................................................      
    }

xmlTextReaderRead(reader) returns -1, and I got the following error;

I/O Error: Invalid argument
Entity:  line 1: parser error: Extra content at the end of document.


BTW, the XML string is valid and no extra  content at its end.

What is the problem? What to do to read xml from socket in windows?

Steve

Daniel Veillard wrote:
> On Sat, Jan 20, 2007 at 05:57:27PM -0800, Steve Yan wrote:
>   
>> Hi,
>>
>> This may be a question asked by people before, but I could not find answer 
>> from google.
>>     
>
>   Bad excuse: 
>     http://xmlsoft.org/docs.html
>

>   
>> I am trying to read out and parse XML from a socket, which API should I 
>> use? any sample code?
>>     
>
>   There is multiple parsing APIs, tree, xmlReader or SAX, all of them can
> consume from a file descriptor, and you can build your own I/O handlers too.
>
>    http://xmlsoft.org/html/libxml-parser.html#xmlReadFd
>    http://xmlsoft.org/html/libxml-parser.html#xmlReadIO
> and
>    http://xmlsoft.org/xmlio.html
>
> Daniel
>

> P.S.: posting a completely unrelated message by replying to an existing
>       mail and changing the subject if fine if you understand you also
>       need to remove the In-Reply-To: and References: headers, otherwise

>       you just break mail threading of people using decent email clients...
>       Please don't do that !
>
>   
_______________________________________________
xml mailing list, project page  http://xmlsoft.org/
xmlgnome.org

http://mail.gnome.org/mailman/listinfo/xml



  

  
  
   
     
    






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