/**
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* 生成缩略图
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*
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* Created by CSJ on 16/8/23.
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*/
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var page = require('webpage').create(),
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system = require('system'),
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url, picName, jsWait, tmpDir;
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url = system.args[ 1 ];
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picName = system.args[ 2 ],
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jsWait = system.args[ 3 ] || 2000,
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tmpDir = system.args[ 4 ];
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page.viewportSize = { width: 1024, height: 1024 };
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page.clipRect = { top: 0, left: 0, width: 1024, height: 1024 };
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// this function writes the arguments to stdout
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var log = function () {
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Array.prototype.slice.call(arguments).map(system.stdout.writeLine);
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};
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// this function writes the arguments to the stderr
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var err = function () {
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Array.prototype.slice.call(arguments).map(system.stderr.writeLine);
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};
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// this function renders the page
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var renderPage = function () {
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// render the page
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try {
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page.render(tmpDir + '/' + picName + '.JPEG');
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} catch (error) {
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phantom.exit(3);
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}
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phantom.exit();
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};
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var renderIfDone = function renderIfDone() {
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setTimeout(renderPage, jsWait);
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};
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// when finishing loading the resources
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// start the timer for js execution to complete
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page.open(url, renderIfDone);
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