Does case sensitivity matter when encoding characters in SOAP call?-CodePudding

I've been running a soap call, and when I encode an ampersand in lower case, i.e "Jack & Jill" it works as expected and is received on the other end, but when I send: "Jack &AMP; Jill", I get a 400 bad request error.

I've looked into it, and all I can see is that the tags are case sensitive, but I haven't seen anything that specifically says that encoding is case sensitive. Is this the case everywhere, or is there something that can be changed to allow uppercase &AMP; to be accepted.

CodePudding user response：

XML is case-sensitive. Entity names, like element and attribute names, must use the correct case. The entity name & is defined in the XML specification and cannot be written as &AMP;.

HTML is a different matter.

CodePudding user response：

It depends on parser implementation, here are some examples

Python3 (case sensitive/insensitive)

>>> from xml.sax.saxutils import unescape
>>> unescape('&AMP; &amp;')
'&AMP; &'

echo -e '&AMP; \n&amp;' | python3 -c 'import html,sys; print(html.unescape(sys.stdin.read()), end="")'
& 
&

PHP (case sensitive/insensitive)

php -r 'echo html_entity_decode("&AMP; \n&amp;") . "\n";'
&AMP; 
&

php -r 'echo html_entity_decode("&AMP; \n&amp;", $flags = ENT_HTML5) . "\n";'
& 
&

Xmllint (case sensitive)

echo -e '<div>\n&AMP; \n&amp;\n</div>' | xmllint --html --nowrap -
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html><body>
<div>
&amp;AMP; 
&amp;
</div>
</body></html>

echo -e '<div>\n&AMP; \n&amp;\n</div>' | xmllint -
-:2: parser error : Entity 'AMP' not defined
&AMP; 
     ^

recode (case sensitive)

echo -e '&AMP; \n&amp;' | recode html..ascii
&AMP; 
&

Firefox (XML case sensitive/ HTML case insensitive)