让gulp-webserver自动化开发服务器支持SSI语法 （include等）

var webserver = require('gulp-webserver');
var connectSSI = require('connect-ssi');
gulp.task('webserver', function() {
    gulp.src('./')
        .pipe(webserver({
            fallback:   './views/error.html',
            livereload: true,
            directoryListing: true,
            port:8000,
            open: true,
            middleware: [
                connectSSI({
                    ext: '.shtml', // file extension. Only urls ending in this will be evaluated.
                    baseDir: __dirname // base path to look in for files
                })
            ]
        }));
});