generate svg captcha in node.js or express.js. 

generate svg captcha in node.js or express.js

lichaozhy

steambap

svg-captcha

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	 * if false, captcha will be black and white

	 * otherwise, it will be randomly colorized

	 * if set to true, it will draw with light grey color

	 * use if you have a site with dark theme

	 * only active when color is set to false

	 * set type of image/svg before send to client side

 * This method returns a object that has two props:

export function create(options?: ConfigObject): CaptchaObj;

 * note that this method generate a math expression

 * this means that text is the result of the math expression

export function createMathExpr(options?: ConfigObject): CaptchaObj;

 * Override the default font with your own

export function loadFont(url: string): void;

export function randomText(size): string;

	const fontScale = fontSize / opts.font.unitsPerEm;

	const glyph = opts.font.charToGlyph(ch);

	const width = glyph.advanceWidth ? glyph.advanceWidth * fontScale : 0;

	const top = opts.y - (opts.descender * fontScale);

	const path = glyph.getPath(left, top, fontSize);

  "description": "generate svg captcha in node.js or express.js",

    "url": "git+https://github.com/steambap/svg-captcha.git"

    "url": "https://github.com/steambap/svg-captcha/issues"

  "homepage": "https://github.com/steambap/svg-captcha#readme",

		@@ -69,2 +69,4 @@ /**
		* text: captcha text
		* @param {ConfigObject} [options]
		* @return {CaptchaObj}
		*/
		@@ -78,2 +80,4 @@ export function create(options?: ConfigObject): CaptchaObj;
		* this means that text is the result of the math expression
		* @param {ConfigObject} [options]
		* @return {CaptchaObj}
		*/
		@@ -83,2 +87,3 @@ export function createMathExpr(options?: ConfigObject): CaptchaObj;
		* Override the default font with your own
		* @param {string} url
		*/
		@@ -92,3 +97,5 @@ export function loadFont(url: string): void;
		* return a random string
		* @param {number} size
		* @return {string}
		*/
		export function randomText(size): string;

		'use strict';
		const assert = require('assert');

		function rndPathCmd(cmd) {
		const r = (Math.random() * 0.2) - 0.1;

		switch (cmd.type) {
		case 'M': case 'L':
		cmd.x += r;
		cmd.y += r;
		break;
		case 'Q': case 'C':
		cmd.x += r;
		cmd.y += r;
		cmd.x1 += r;
		cmd.y1 += r;
		break;
		default:
		// Close path cmd
		break;
		}

		return cmd;
		}

		module.exports = function (text, opts) {
		@@ -17,2 +39,4 @@ const ch = text[0];
		const path = glyph.getPath(left, top, fontSize);
		// Randomize path commands
		path.commands.forEach(rndPathCmd);

		@@ -19,0 +43,0 @@ const pathData = path.toPathData();

		{
		"name": "svg-captcha",
		"version": "1.3.5",
		"version": "1.3.6",
		"description": "generate svg captcha in node.js or express.js",
		@@ -40,3 +40,3 @@ "main": "index.js",
		"fs-extra": "^3.0.1",
		"mocha": "^3.3.0",
		"mocha": "^3.4.2",
		"xo": "^0.18.2"
		@@ -43,0 +43,0 @@ },

Fixed alerts

Improved metrics