Creating string with libxml2 (c++)

Question

My problem is that I want to create xml tree and get a simple string object (or even char*). And I can't save xml to file.

So in the input I have xmlDocPtr with complete xml tree and want to get string containing xml but without using files.

Thx for attention.

Michael Anderson · Accepted Answer · 2013-07-03 08:09:56Z

12

Use xmlDocDumpMemory or any of its cousins. Usage:

void xml_to_string(xmlDocPtr doc, std::string &out)
{
    xmlChar *s;
    int size;
    xmlDocDumpMemory(doc, &s, &size);
    if (s == NULL)
        throw std::bad_alloc();
    try {
        out = (char *)s;
    } catch (...) {
        xmlFree(s);
        throw;
    }
    xmlFree(s);
}

edited Jul 3, 2013 at 8:09

Michael Anderson

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answered Nov 11, 2010 at 15:21

Fred Foo

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Comments

Kei · Accepted Answer · 2010-11-11 15:27:54Z

1

Something I wrote while ago. Hope it helps....

xmlDocPtr pDoc = ... // your xml docuemnt

xmlCharPtr psOutput;
int iSize;
xmlDocDumpFormatMemoryEnc(pDoc, &psOutput, &iSize, "UTF-8", 1);

// psOutput should point to the string.

// Don't forget to free the memory.
xmlFree(psOutput);

answered Nov 11, 2010 at 15:27

Kei

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Comments

neverlastn · Accepted Answer · 2014-03-25 16:28:44Z

0

If you use xmlDocDumpMemory() be careful. Call xmlCleanupParser() at the very end, after using xmlDocDumpMemory(). It seems like xmlDocDumpMemory() uses it internaly.

answered Mar 25, 2014 at 16:28

neverlastn

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Comments

udslk · Accepted Answer · 2010-11-11 15:19:09Z

-1

I couldnt get exactly what you want but after changing the node value you can save it easily with xmlDocDump.

answered Nov 11, 2010 at 15:19

udslk

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2 Comments

Fred Foo Over a year ago

The OP says he does not want to save the XML to a file.

udslk Over a year ago

ups.. i think i couldnt get the problem well.

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