shell bypass 403
'use strict';
var xmldoc = require('xmldoc');
/** Strip unit postfix, parse number, but return undefined instead of NaN for bad input */
function stripUnits(textVal) {
var n = parseFloat(textVal);
if (typeof n !== 'number' || isNaN(n)) {
return undefined;
}
return n;
}
/** Make sure it's valid XML and the root tage is <svg/>, returns xmldoc DOM */
function parseSVG(svgString) {
var doc;
try {
doc = new xmldoc.XmlDocument(svgString);
} catch (err) {
throw new Error('SVGMeasure: ' + err);
}
if (doc.name !== "svg") {
throw new Error('SVGMeasure: expected <svg> document');
}
return doc;
}
function SVGMeasure() {
}
SVGMeasure.prototype.measureSVG = function (svgString) {
var doc = parseSVG(svgString);
var docWidth = stripUnits(doc.attr.width);
var docHeight = stripUnits(doc.attr.height);
if ((docWidth == undefined || docHeight == undefined) && typeof doc.attr.viewBox == 'string') {
var viewBoxParts = doc.attr.viewBox.split(/[,\s]+/);
if (viewBoxParts.length !== 4) {
throw new Error("Unexpected svg viewbox format, should have 4 entries but found: '" + doc.attr.viewBox + "'");
}
if (docWidth == undefined) {
docWidth = stripUnits(viewBoxParts[2]);
}
if (docHeight == undefined) {
docHeight = stripUnits(viewBoxParts[3]);
}
}
return {
width: docWidth,
height: docHeight
};
};
SVGMeasure.prototype.writeDimensions = function (svgString, dimensions) {
var doc = parseSVG(svgString);
doc.attr.width = "" + dimensions.width;
doc.attr.height = "" + dimensions.height;
return doc.toString();
};
module.exports = SVGMeasure;