从phantomjs webserver返回二进制结果

Question

Is there any way to return result froma PhantomJS webserver as binary?

To be more specific, If I render a screenshot of a page as base64, can I then transform this base64 string into binary and return it so the client receives it as an image?

This is what I have so far, I've commented out some of my experiments which apparently doesnt work

response.statusCode = 200;
response.setHeader("Content-Type", "image/png");
//response.setHeader("Content-Encoding","base64");
var base64 = page.renderBase64('png');
//var binary=atob(base64,"b");
response.write(base64  );
response.close();       

Ideas?

Answer 1

You can just set the Encoding to binary, and it will work:

response.statusCode = 200;
response.headers = {
    'Cache': 'no-cache',
    'Content-Type': 'image/png'
};
response.setEncoding('binary');
response.write(atob(page.renderBase64('png')));
response.close();

Answer 2

The solution is to use binary encoding in webserver module and page.evaluate inside web page module to generate binary content.

the result is something like this (assuming page is defined) :

response.statusCode = 200;
response.setEncoding("binary");
response.setHeader("Content-Type", "image/png");
var base64 = page.renderBase64('png');
var binary = page.evaluate(function (data) { return atob(data, "b");}, base64);
response.write(binary)
response.close();