The file downloads and extracts correctly (Or at least the size is correct) on Windows, so I suspect this is a problem with the zip code, not the network code.

CCing owners of chrome/browser/resources/chromeos/zip_archiver/OWNERS, and adding the FileManager component though no idea if either of those will get this in front of the right people.

I have confirmed this happens on the latest (69.0.3453.0) and M67 stable (67.0.3396.87).

As a workaround, set #enable-zip-archiver-unpacker flag to "Disabled" so that it'll read the content correctly.

So far I found that this doesn't happen when #enable-zip-archiver-unpacker flag is enabled. The flag config above rolls back the update that happened at M67 with Zip archiver. By this reason I think this is a regression at M67.

This is caused by not supporting ZIP64. (should read file size from extra field when needed.)
I quickly took a look and seems minizip supports ZIP64 since version 2.3.0.
https://github.com/nmoinvaz/minizip/commit/a56a08cf793f943d309367be9289eae7844b0754
Zip Archiver is based on minizip version 1.2.

This issue is a blocker for  Issue 821761  because the workaround mentioned in #3 will become unavailable after removing the old extension.

Assigning to weifangsun@ for triage.

Thanks for looping me in yamaguchi@. Can you confirm - the fix for this issue is to update the minizip library referenced by the Zip Archiver? What is the level of effort/impact of doing this?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e

commit 21ce588d37c189646cd80e46c7ea1ddd5ec0f98e
Author: Anand K. Mistry <amistry@chromium.org>
Date: Mon Nov 05 07:06:07 2018

Uprev minizip to 2.7.0

BUG= 791396 , 855197 

Change-Id: I4e4602e3748247c6bd0d1973c368467e1dc057fc
Reviewed-on: https://chromium-review.googlesource.com/c/1309387
Commit-Queue: Anand Mistry <amistry@chromium.org>
Reviewed-by: Sam McNally <sammc@chromium.org>
Reviewed-by: Stuart Langley <slangley@chromium.org>
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605270}
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/DEPS
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/chrome/browser/resources/chromeos/zip_archiver/cpp/BUILD.gn
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/chrome/browser/resources/chromeos/zip_archiver/cpp/compressor_archive_minizip.cc
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/chrome/browser/resources/chromeos/zip_archiver/cpp/compressor_archive_minizip.h
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/chrome/browser/resources/chromeos/zip_archiver/cpp/compressor_archive_minizip_unittest.cc
[add] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/chrome/browser/resources/chromeos/zip_archiver/cpp/minizip_helpers.h
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/chrome/browser/resources/chromeos/zip_archiver/cpp/volume_archive_minizip.cc
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/chrome/browser/resources/chromeos/zip_archiver/cpp/volume_archive_minizip.h
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/chrome/browser/resources/chromeos/zip_archiver/cpp/volume_archive_minizip_unittest.cc
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/chrome/browser/resources/chromeos/zip_archiver/cpp/volume_reader_javascript_stream.cc
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/testing/libfuzzer/fuzzers/BUILD.gn
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/testing/libfuzzer/fuzzers/minizip_compress_fuzzer.cc
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/testing/libfuzzer/fuzzers/minizip_uncompress_fuzzer.cc
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/third_party/minizip/BUILD.gn
[add] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/third_party/minizip/DEPS
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/third_party/minizip/README.chromium
[add] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/third_party/minizip/mz_os_chrome.cc
[modify] https://crrev.com/21ce588d37c189646cd80e46c7ea1ddd5ec0f98e/ui/file_manager/integration_tests/file_manager/zip_files.js