Hi again!
Lennart, you nerdsniped me.
Dixi quod…
>Lennart Jablonka dixit:
>>> I’m not sure whether it may then also self-close all tags but would
>>> assume so (except I know tech is… tricky).
>>
>> As in an XML document, <asdf/> and <asdf></asdf> are entirely equivalent,
>> yes,
>> the server may then “self-close” all empty elements.
>
>That’s what made me say I’d assume so, but I know tech, which is
>why I hesitate.
I found hints towards still requiring the empty not-self-closed
tags even in XML but I forgot where during the subsequent hacking
which took m̲u̲c̲h̲ longer than expected.
But here is that hacking’s result. Find attached an LD_PRELOAD library
that makes “xmlstarlet fo”, without -o (because it then uses yet other
libxml2 function calls), output XHTML ☻
Prepare:
$ sudo apt-get install libxml2-dev
Compile and link:
$ gcc -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -fstack-protector-strong \
-Wformat -Werror=format-security -Wall -Wextra \
$(xml2-config --cflags) -DPIC -fPIC -shared -o libforceXHTML.so \
forceXHTML.c
Use:
$ LD_PRELOAD=$PWD/libforceXHTML.so xmlstarlet fo [-n] [-e encoding] filename|-
C̲a̲v̲e̲a̲t̲:̲ without -n it breaks up “old browser-safe” framing for CSS and
JS:
<style type="text/css"><!--/*--><![CDATA[/*><!--*/
…
/*]]>*/--></style>
<script type="text/javascript"><!--//--><![CDATA[//><!--
…
//--><!]]></script>
This is because in XML, the <!--/*--> or <!--//--> is a
comment node inside the style/script node (as is correct)
and libxml2’s “XHTML” output code writes a newline after
each node if indenting. xhtmlNodeListDumpOutput() is
static, so not up for LD_PRELOAD hacks. But the OP was
not formatting/indenting their XML anyway so this strikes
me as a suitable postprocessing step. I did verify that it
properly adds spaces and not-self-closes elements for one
static XHTML file.
This was initially very mildly based on libxml2 itself,
whose public API sucks badly enough I had to redraft it
from the beginning. (This the reason of taking so long.)
I publish this under Ⓕ CC0.
Enjoy,
//mirabilos
PS: Shlomi Fish, when replying to me, please send to the list
as your provider fails badly enough at SMTP it cannot send
eMails directly to me :/
--
FWIW, I'm quite impressed with mksh interactively. I thought it was much
*much* more bare bones. But it turns out it beats the living hell out of
ksh93 in that respect. I'd even consider it for my daily use if I hadn't
wasted half my life on my zsh setup. :-) -- Frank Terbeck in #!/bin/mksh/* sudo apt-get install libxml2-dev */
/* gcc -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -fstack-protector-strong -Wformat
-Werror=format-security -Wall -Wextra $(xml2-config --cflags) -DPIC -fPIC
-shared -o libforceXHTML.so forceXHTML.c */
/* LD_PRELOAD=$PWD/libforceXHTML.so xmlstarlet fo [-n] [-e encoding] filename|-
*/
/* do not use the xmlstarlet fo -o option! */
#include <stddef.h>
#include <stdio.h>
#include <libxml2/libxml/tree.h>
#include <libxml2/libxml/xmlsave.h>
static int
rpl_xmlSaveFormatFileEnc(const char *filename, xmlDocPtr cur,
const char *encoding)
{
xmlSaveCtxtPtr ctx;
int i;
if (!encoding)
encoding = (const void *)cur->encoding;
i = XML_SAVE_XHTML;
if (xmlIndentTreeOutput)
i |= XML_SAVE_FORMAT;
ctx = xmlSaveToFilename(filename, encoding, i);
if (!ctx)
return (-1);
i = xmlSaveDoc(ctx, cur);
/* fucking libxml2 API gives us no way to check close() errors */
if (i >= 0)
i = xmlSaveClose(ctx);
else
xmlSaveClose(ctx);
fprintf(stderr, "\nI: forceXHTML save %s\n",
i < 0 ? "failed" : "ok");
return (i);
}
int
xmlSaveFormatFileEnc(const char *filename, xmlDocPtr cur,
const char *encoding, int format __attribute__((__unused__)))
{
return (rpl_xmlSaveFormatFileEnc(filename, cur, encoding));
}
int
xmlSaveFormatFile(const char *filename, xmlDocPtr cur,
int format __attribute__((__unused__)))
{
return (rpl_xmlSaveFormatFileEnc(filename, cur, NULL));
}
