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Diffstat (limited to '')
-rw-r--r-- | testing/web-platform/tests/common/security-features/subresource/image.py | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/testing/web-platform/tests/common/security-features/subresource/image.py b/testing/web-platform/tests/common/security-features/subresource/image.py new file mode 100644 index 0000000000..5c9a0c063c --- /dev/null +++ b/testing/web-platform/tests/common/security-features/subresource/image.py @@ -0,0 +1,116 @@ +import os, sys, array, math + +from io import BytesIO + +from wptserve.utils import isomorphic_decode + +import importlib +subresource = importlib.import_module("common.security-features.subresource.subresource") + +class Image: + """This class partially implements the interface of the PIL.Image.Image. + One day in the future WPT might support the PIL module or another imaging + library, so this hacky BMP implementation will no longer be required. + """ + def __init__(self, width, height): + self.width = width + self.height = height + self.img = bytearray([0 for i in range(3 * width * height)]) + + @staticmethod + def new(mode, size, color=0): + return Image(size[0], size[1]) + + def _int_to_bytes(self, number): + packed_bytes = [0, 0, 0, 0] + for i in range(4): + packed_bytes[i] = number & 0xFF + number >>= 8 + + return packed_bytes + + def putdata(self, color_data): + for y in range(self.height): + for x in range(self.width): + i = x + y * self.width + if i > len(color_data) - 1: + return + + self.img[i * 3: i * 3 + 3] = color_data[i][::-1] + + def save(self, f, type): + assert type == "BMP" + # 54 bytes of preambule + image color data. + filesize = 54 + 3 * self.width * self.height + # 14 bytes of header. + bmpfileheader = bytearray([ord('B'), ord('M')] + self._int_to_bytes(filesize) + + [0, 0, 0, 0, 54, 0, 0, 0]) + # 40 bytes of info. + bmpinfoheader = bytearray([40, 0, 0, 0] + + self._int_to_bytes(self.width) + + self._int_to_bytes(self.height) + + [1, 0, 24] + (25 * [0])) + + padlength = (4 - (self.width * 3) % 4) % 4 + bmppad = bytearray([0, 0, 0]) + padding = bmppad[0 : padlength] + + f.write(bmpfileheader) + f.write(bmpinfoheader) + + for i in range(self.height): + offset = self.width * (self.height - i - 1) * 3 + f.write(self.img[offset : offset + 3 * self.width]) + f.write(padding) + +def encode_string_as_bmp_image(string_data): + data_bytes = array.array("B", string_data.encode("utf-8")) + + num_bytes = len(data_bytes) + + # Encode data bytes to color data (RGB), one bit per channel. + # This is to avoid errors due to different color spaces used in decoding. + color_data = [] + for byte in data_bytes: + p = [int(x) * 255 for x in '{0:08b}'.format(byte)] + color_data.append((p[0], p[1], p[2])) + color_data.append((p[3], p[4], p[5])) + color_data.append((p[6], p[7], 0)) + + # Render image. + num_pixels = len(color_data) + sqrt = int(math.ceil(math.sqrt(num_pixels))) + img = Image.new("RGB", (sqrt, sqrt), "black") + img.putdata(color_data) + + # Flush image to string. + f = BytesIO() + img.save(f, "BMP") + f.seek(0) + + return f.read() + +def generate_payload(request, server_data): + data = (u'{"headers": %(headers)s}') % server_data + if b"id" in request.GET: + request.server.stash.put(request.GET[b"id"], data) + data = encode_string_as_bmp_image(data) + return data + +def generate_report_headers_payload(request, server_data): + stashed_data = request.server.stash.take(request.GET[b"id"]) + return stashed_data + +def main(request, response): + handler = lambda data: generate_payload(request, data) + content_type = b'image/bmp' + + if b"report-headers" in request.GET: + handler = lambda data: generate_report_headers_payload(request, data) + content_type = b'application/json' + + subresource.respond(request, + response, + payload_generator = handler, + content_type = content_type, + access_control_allow_origin = b"*") |