node.js中的http.response.addTrailers方法使用说明

response.addTrailers(headers)

response.writeHead(200, { 'Content-Type': 'text/plain',   'Trailer': 'Content-MD5' });
response.write(fileData);
response.addTrailers({'Content-MD5': "7895bf4b8828b55ceaf47747b4bca667"});
response.end();