newxml ~main

XML parsing library with DOM implementation


To use this package, run the following command in your project's root directory:

Manual usage
Put the following dependency into your project's dependences section:

newxml

XML library for D with DOM compatibility. Based on the never finished experimental.xml library.

DOM (https://dom.spec.whatwg.org/) is a widely used cross-platform standard for implementing XML libraries, and has been used for languages like C++, Java, Javascript, Python, etc. in some form or another.

Differences from regular DOM

  • Some templates have been added to make things easier.
  • Configurable default StringType.

Differences between newxml and experimental.xml

  • newxml has an active development.
  • newxml is GC only, for simplicity sake.
  • newxml implements proper DOMString, with the option of configuring it to either UTF-8 or UTF-32 instead of the UTF-16, which is default in DOM.
  • newXML has memory safety implemented.

Usage example

DOM parser

Please read the official DOM manual (https://dom.spec.whatwg.org/) before using the library. It's pretty much the exact same thing at this point, only a few functions might not work yet (see chapter "To do list"). It's also used for other languages, so there's a good chance you already used it in C++, Python, Java, etc.

The just give me an Document function aka. Document parseXMLString(string) can be used like this:

import std.format;

string xml = q"{
<!DOCTYPE mydoc https://myUri.org/bla [
    <!ELEMENT myelem ANY>
    <!ENTITY   myent    "replacement text">
    <!ATTLIST myelem foo cdata #REQUIRED >
    <!NOTATION PUBLIC 'h'>
    <!FOODECL asdffdsa >
]>
}";

Document doc = parseXMLString(xml);
assert(doc !is null);

If you want to do this step by step, you should create the builder, then you can get the document built with it for further processing:

import newxml;                                  //imports the whole library

string xml = [...];                             //the document to be processed.

auto builder =
         xml
        .lexer
        .parser
        .cursor
        .domBuilder(new domimpl.DOMImplementation());   //this creates the builder, in the future, I want to make a simpler solution for this problem.

builder.setSource(xml);                         //sets the source for the builder
builder.buildRecursive;                         //builds the document
Document doc = builder.getDocument;             //this function gets the document to be processed

assert(doc.firstChild.name == "xmlDoc")         //
[...]

SAX parser

This is an event-driven parser, that calls various delegates when certain types of nodes are encountered, and passes the necessary data to them.

import newxml;                                  //imports the whole library

string xml = [...];                             //the document to be processed.

auto parser =
         xml
        .lexer
        .parser
        .cursor
        .saxParser; //this creates the SAX parser, in the future, I want to make a simpler solution for this problem.

parser.setSource(xml);  //sets the source to be parsed

//This block sets up various event delegates.
parser.onDocument = &handler.onDocument;    
parser.onElementStart = &handler.onElementStart;
parser.onElementEnd = &handler.onElementEnd;
parser.onElementEmpty = &handler.onElementEmpty;
parser.onText = &handler.onText;
parser.onComment = &handler.onComment;
parser.onProcessingInstruction = &handler.onProcessingInstruction;

parser.processDocument();   //Processes the document, and calls the appropriate delegates for processing purposes.

Low level parsers

Although very uncomfortable to use compared to its higher-level counterparts, the low-level API can sill be used for parsing XML. e.g. you really need that extra memory and speed.

To do list

  • Implement missing DOM functions. Basic DTD and internal entities now work.
  • Improve error handling. (Currently it doesn't seem to work well with the DOM parser for some reason)
  • Write even more testcases.
  • Gather input on library and adjust things accordingly.
  • Implement namespace URI handling (currently it's unimplemented with many supporting functions potentially broken).
Authors:
  • Laszlo Szeremi
Dependencies:
none
Versions:
0.3.0 2022-Sep-17
0.2.1 2022-Sep-11
0.2.0 2022-Sep-09
~main 2022-Sep-17
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