ws-js/lib/handlers/client/mtom/mtom.js

WS-* implementation for node

var select = require('../../../xpath').SelectNodes;
var Dom = require('xmldom').DOMParser;
var utils = require('../../../utils');
var writer = require('../../../../lib/handlers/client/mtom/mime-writer.js');
var reader = require('../../../../lib/handlers/client/mtom/mime-reader.js');
require('bufferjs');

exports.MtomClientHandler = MtomClientHandler;


function MtomClientHandler() {
	
}

MtomClientHandler.prototype.send = function(ctx, callback) {
	

	var self = this;
	boundary = "my_unique_boundary";

	var parts = [{
		id: "part0", 
		contentType: 'application/xop+xml;charset=utf-8;type="'+ctx.contentType+'"', 
		encoding: "8bit"}];
		
	var doc = new Dom().parseFromString(ctx.request);		

	for (var i in ctx.base64Elements) {
		
		var file = ctx.base64Elements[i];		
		var elem = select(doc, file.xpath)[0];
		
		var binary = new Buffer(elem.firstChild.data, 'base64');
		
		var id = "part" + (parseInt(i)+1);
		parts.push({id: id, contentType: file.contentType, body: binary, encoding: "binary"});

		//put an xml placeholder
		elem.removeChild(elem.firstChild);
		utils.addElement(doc, elem, "http://www.w3.org/2004/08/xop/include", "xop:Include");
		elem.firstChild.setAttribute("xmlns:xop", "http://www.w3.org/2004/08/xop/include");
		elem.firstChild.setAttribute("href", "cid:" + id);

	}

	parts[0].body = new Buffer(doc.toString());

	ctx.contentType = 'multipart/related; type="application/xop+xml";start="<part0>";boundary="'+boundary+'";start-info="'
						 + ctx.contentType +'"; action="'+ctx.action+'"';

	ctx.request = writer.build_multipart_body(parts, boundary);

	this.next.send(
			ctx, 
			function(ctx) { 
				self.receive(ctx, callback); 
			});
}

MtomClientHandler.prototype.receive = function(ctx, callback) {		

	if (!ctx.resp_contentType) {	
		console.log("warning: no content type in response");	
		callback(ctx);
		return;
	}

	var boundary = utils.parseBoundary(ctx.resp_contentType);

	//console.log("boundary: " + boundary);
	//console.log("CTX Response: " + ctx.response);

	//slice since in http multipart response the first chars seems to be #13#10 which the parser does not expect
	var parts = reader.parse_multipart(ctx.response.slice(2), boundary);


	if (parts.length==0) {		
		console.log("warning: no mime parts in response");	
		callback(ctx);
		return;
	}
	

	var doc = new Dom().parseFromString(parts[0].data.toString());	

	for (var i in parts) {
		var p = parts[i];
		var id = utils.extractContentId(p.headers["content-id"] );
		var xpath = "//*[@href='cid:" + encodeURIComponent(id) + "']//parent::*";
		
		console.log("xml: " + doc.toString());
		console.log("xpath: " + xpath);

		var elem = select(doc, xpath)[0];

		console.log("elem: " + elem);

		if (!elem)
			continue;
		
		elem.removeChild(elem.firstChild);
		utils.setElementValue(doc, elem, p.data.toString("base64"));
	}
			
	
	ctx.response = doc.toString();
	

	callback(ctx);
}