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Add support for webp thumbnailing (#7586)
Closes #4382 Signed-off-by: Maxim Plotnikov <wgh@torlan.ru>
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changelog.d/7586.feature
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1
changelog.d/7586.feature
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@ -0,0 +1 @@
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Add support for generating thumbnails for WebP images. Previously, users would see an empty box instead of preview image.
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@ -70,6 +70,7 @@ def parse_thumbnail_requirements(thumbnail_sizes):
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jpeg_thumbnail = ThumbnailRequirement(width, height, method, "image/jpeg")
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png_thumbnail = ThumbnailRequirement(width, height, method, "image/png")
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requirements.setdefault("image/jpeg", []).append(jpeg_thumbnail)
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requirements.setdefault("image/webp", []).append(jpeg_thumbnail)
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requirements.setdefault("image/gif", []).append(png_thumbnail)
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requirements.setdefault("image/png", []).append(png_thumbnail)
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return {
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@ -18,10 +18,16 @@ import os
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import shutil
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import tempfile
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from binascii import unhexlify
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from io import BytesIO
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from typing import Optional
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from mock import Mock
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from six.moves.urllib import parse
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import attr
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import PIL.Image as Image
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from parameterized import parameterized_class
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from twisted.internet.defer import Deferred
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from synapse.logging.context import make_deferred_yieldable
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@ -94,6 +100,68 @@ class MediaStorageTests(unittest.HomeserverTestCase):
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self.assertEqual(test_body, body)
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@attr.s
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class _TestImage:
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"""An image for testing thumbnailing with the expected results
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Attributes:
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data: The raw image to thumbnail
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content_type: The type of the image as a content type, e.g. "image/png"
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extension: The extension associated with the format, e.g. ".png"
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expected_cropped: The expected bytes from cropped thumbnailing, or None if
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test should just check for success.
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expected_scaled: The expected bytes from scaled thumbnailing, or None if
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test should just check for a valid image returned.
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"""
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data = attr.ib(type=bytes)
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content_type = attr.ib(type=bytes)
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extension = attr.ib(type=bytes)
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expected_cropped = attr.ib(type=Optional[bytes])
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expected_scaled = attr.ib(type=Optional[bytes])
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@parameterized_class(
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("test_image",),
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[
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# smol png
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(
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_TestImage(
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unhexlify(
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b"89504e470d0a1a0a0000000d4948445200000001000000010806"
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b"0000001f15c4890000000a49444154789c63000100000500010d"
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b"0a2db40000000049454e44ae426082"
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),
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b"image/png",
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b".png",
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unhexlify(
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b"89504e470d0a1a0a0000000d4948445200000020000000200806"
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b"000000737a7af40000001a49444154789cedc101010000008220"
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b"ffaf6e484001000000ef0610200001194334ee0000000049454e"
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b"44ae426082"
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),
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unhexlify(
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b"89504e470d0a1a0a0000000d4948445200000001000000010806"
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b"0000001f15c4890000000d49444154789c636060606000000005"
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b"0001a5f645400000000049454e44ae426082"
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),
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),
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),
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# small lossless webp
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(
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_TestImage(
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unhexlify(
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b"524946461a000000574542505650384c0d0000002f0000001007"
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b"1011118888fe0700"
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),
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b"image/webp",
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b".webp",
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None,
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None,
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),
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),
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],
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)
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class MediaRepoTests(unittest.HomeserverTestCase):
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hijack_auth = True
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@ -151,13 +219,6 @@ class MediaRepoTests(unittest.HomeserverTestCase):
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self.download_resource = self.media_repo.children[b"download"]
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self.thumbnail_resource = self.media_repo.children[b"thumbnail"]
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# smol png
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self.end_content = unhexlify(
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b"89504e470d0a1a0a0000000d4948445200000001000000010806"
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b"0000001f15c4890000000a49444154789c63000100000500010d"
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b"0a2db40000000049454e44ae426082"
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)
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self.media_id = "example.com/12345"
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def _req(self, content_disposition):
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@ -176,14 +237,14 @@ class MediaRepoTests(unittest.HomeserverTestCase):
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self.assertEqual(self.fetches[0][3], {"allow_remote": "false"})
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headers = {
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b"Content-Length": [b"%d" % (len(self.end_content))],
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b"Content-Type": [b"image/png"],
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b"Content-Length": [b"%d" % (len(self.test_image.data))],
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b"Content-Type": [self.test_image.content_type],
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}
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if content_disposition:
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headers[b"Content-Disposition"] = [content_disposition]
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self.fetches[0][0].callback(
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(self.end_content, (len(self.end_content), headers))
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(self.test_image.data, (len(self.test_image.data), headers))
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)
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self.pump()
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@ -196,12 +257,15 @@ class MediaRepoTests(unittest.HomeserverTestCase):
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If the filename is filename=<ascii> then Synapse will decode it as an
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ASCII string, and use filename= in the response.
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"""
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channel = self._req(b"inline; filename=out.png")
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channel = self._req(b"inline; filename=out" + self.test_image.extension)
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headers = channel.headers
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self.assertEqual(headers.getRawHeaders(b"Content-Type"), [b"image/png"])
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self.assertEqual(
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headers.getRawHeaders(b"Content-Disposition"), [b"inline; filename=out.png"]
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headers.getRawHeaders(b"Content-Type"), [self.test_image.content_type]
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)
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self.assertEqual(
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headers.getRawHeaders(b"Content-Disposition"),
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[b"inline; filename=out" + self.test_image.extension],
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)
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def test_disposition_filenamestar_utf8escaped(self):
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@ -211,13 +275,17 @@ class MediaRepoTests(unittest.HomeserverTestCase):
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response.
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"""
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filename = parse.quote("\u2603".encode("utf8")).encode("ascii")
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channel = self._req(b"inline; filename*=utf-8''" + filename + b".png")
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channel = self._req(
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b"inline; filename*=utf-8''" + filename + self.test_image.extension
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)
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headers = channel.headers
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self.assertEqual(headers.getRawHeaders(b"Content-Type"), [b"image/png"])
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self.assertEqual(
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headers.getRawHeaders(b"Content-Type"), [self.test_image.content_type]
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)
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self.assertEqual(
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headers.getRawHeaders(b"Content-Disposition"),
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[b"inline; filename*=utf-8''" + filename + b".png"],
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[b"inline; filename*=utf-8''" + filename + self.test_image.extension],
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)
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def test_disposition_none(self):
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@ -228,27 +296,16 @@ class MediaRepoTests(unittest.HomeserverTestCase):
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channel = self._req(None)
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headers = channel.headers
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self.assertEqual(headers.getRawHeaders(b"Content-Type"), [b"image/png"])
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self.assertEqual(
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headers.getRawHeaders(b"Content-Type"), [self.test_image.content_type]
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)
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self.assertEqual(headers.getRawHeaders(b"Content-Disposition"), None)
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def test_thumbnail_crop(self):
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expected_body = unhexlify(
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b"89504e470d0a1a0a0000000d4948445200000020000000200806"
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b"000000737a7af40000001a49444154789cedc101010000008220"
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b"ffaf6e484001000000ef0610200001194334ee0000000049454e"
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b"44ae426082"
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)
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self._test_thumbnail("crop", expected_body)
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self._test_thumbnail("crop", self.test_image.expected_cropped)
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def test_thumbnail_scale(self):
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expected_body = unhexlify(
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b"89504e470d0a1a0a0000000d4948445200000001000000010806"
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b"0000001f15c4890000000d49444154789c636060606000000005"
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b"0001a5f645400000000049454e44ae426082"
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)
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self._test_thumbnail("scale", expected_body)
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self._test_thumbnail("scale", self.test_image.expected_scaled)
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def _test_thumbnail(self, method, expected_body):
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params = "?width=32&height=32&method=" + method
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@ -259,13 +316,19 @@ class MediaRepoTests(unittest.HomeserverTestCase):
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self.pump()
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headers = {
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b"Content-Length": [b"%d" % (len(self.end_content))],
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b"Content-Type": [b"image/png"],
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b"Content-Length": [b"%d" % (len(self.test_image.data))],
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b"Content-Type": [self.test_image.content_type],
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}
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self.fetches[0][0].callback(
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(self.end_content, (len(self.end_content), headers))
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(self.test_image.data, (len(self.test_image.data), headers))
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)
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self.pump()
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self.assertEqual(channel.code, 200)
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self.assertEqual(channel.result["body"], expected_body, channel.result["body"])
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if expected_body is not None:
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self.assertEqual(
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channel.result["body"], expected_body, channel.result["body"]
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)
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else:
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# ensure that the result is at least some valid image
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Image.open(BytesIO(channel.result["body"]))
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