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["h1", | |||
".navigation" | |||
,".logo", | |||
".blank", | |||
".about", | |||
".heading", | |||
".subheading", | |||
".pitch", | |||
".video", | |||
".thermometer", | |||
".order", | |||
".social", | |||
".section1", | |||
".section2", | |||
".faq", | |||
".footer"] |
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#!/usr/bin/env node | |||
/* | |||
Automatically grade files for the presence of specified HTML tags/attributes. | |||
Uses commander.js and cheerio. Teaches command line application development | |||
and basic DOM parsing. | |||
References: | |||
+ cheerio | |||
- https://github.com/MatthewMueller/cheerio | |||
- http://encosia.com/cheerio-faster-windows-friendly-alternative-jsdom/ | |||
- http://maxogden.com/scraping-with-node.html | |||
+ commander.js | |||
- https://github.com/visionmedia/commander.js | |||
- http://tjholowaychuk.com/post/9103188408/commander-js-nodejs-command-line-interfaces-made-easy | |||
+ JSON | |||
- http://en.wikipedia.org/wiki/JSON | |||
- https://developer.mozilla.org/en-US/docs/JSON | |||
- https://developer.mozilla.org/en-US/docs/JSON#JSON_in_Firefox_2 | |||
*/ | |||
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var fs = require('fs'); | |||
var program = require('commander'); | |||
var cheerio = require('cheerio'); | |||
var HTMLFILE_DEFAULT = "index.html"; | |||
var CHECKSFILE_DEFAULT = "checks.json"; | |||
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var assertFileExists = function(infile) { | |||
var instr = infile.toString(); | |||
if(!fs.existsSync(instr)) { | |||
console.log("%s does not exist. Exiting.", instr); | |||
process.exit(1); // http://nodejs.org/api/process.html#process_process_exit_code | |||
} | |||
return instr; | |||
}; | |||
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var cheerioHtmlFile = function(htmlfile) { | |||
return cheerio.load(fs.readFileSync(htmlfile)); | |||
}; | |||
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var loadChecks = function(checksfile) { | |||
return JSON.parse(fs.readFileSync(checksfile)); | |||
}; | |||
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var checkHtmlFile = function(htmlfile, checksfile) { | |||
$ = cheerioHtmlFile(htmlfile); | |||
var checks = loadChecks(checksfile).sort(); | |||
var out = {}; | |||
for(var ii in checks) { | |||
var present = $(checks[ii]).length > 0; | |||
out[checks[ii]] = present; | |||
} | |||
return out; | |||
}; | |||
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var clone = function(fn) { | |||
// Workaround for commander.js issue. | |||
// http://stackoverflow.com/a/6772648 | |||
return fn.bind({}); | |||
}; | |||
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if(require.main == module) { | |||
program | |||
.option('-c, --checks <check_file>', 'Path to checks.json', clone(assertFileExists), CHECKSFILE_DEFAULT) | |||
.option('-f, --file <html_file>', 'Path to index.html', clone(assertFileExists), HTMLFILE_DEFAULT) | |||
.parse(process.argv); | |||
var checkJson = checkHtmlFile(program.file, program.checks); | |||
var outJson = JSON.stringify(checkJson, null, 4); | |||
console.log(outJson); | |||
} else { | |||
exports.checkHtmlFile = checkHtmlFile; | |||
} |