server-timing.py - mozsearch

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from base64 import decodebytes

def main(request, response):

    headers = [

        (b"Content-Type", b"image/png"),

        (b"Server-Timing", b"metric;dur=123.4;desc=\"description\""),

    if b"tao" in request.GET:

        headers.append((b"Timing-Allow-Origin", b"*"))

    if b"cors" in request.GET:

        headers.append((b"Access-Control-Allow-Origin", b"*"))

        headers.append((b"Access-Control-Expose-Headers",

                        b"Server-Timing, Timing-Allow-Origin"))

    # 1x1 transparent PNG

    png_data = decodebytes(

        b"iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk"

        b"YAAAAAYAAjCB0C8AAAAASUVORK5CYII=")

    return headers, png_data