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FIX: Catch UndefinedConversionError for inbound emails (#13000)

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Some emails coming in via the mail receiver can still end up
with bad encoding when trying to enqueue the job. This catches
the last encoding issue and forces iso-8559-1 and encodes to
UTF-8 to circumvent the issue.
This commit is contained in:
Martin Brennan 2021-05-10 14:26:23 +10:00 committed by GitHub
parent aaa034786a
commit c187ede3c6
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3 changed files with 19 additions and 1 deletions
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2
app/controllers/admin/email_controller.rb
View File

@ -158,7 +158,7 @@ class Admin::EmailController < Admin::AdminController
begin
Jobs.enqueue(:process_email, mail: email_raw, retry_on_rate_limit: true, source: :handle_mail)
rescue JSON::GeneratorError => e
rescue JSON::GeneratorError, Encoding::UndefinedConversionError => e
if retry_count == 0
email_raw = email_raw.force_encoding('iso-8859-1').encode("UTF-8")
retry_count += 1

12
spec/fixtures/emails/encoding_undefined_conversion.eml vendored Normal file
View File

@ -0,0 +1,12 @@
Return-Path: <discourse@bar.com>
From: Foo Bar <discourse@bar.com>
To: someone@else.com
CC: team@bar.com, wat@bar.com, reply+d400310beeae61d785c2ac6a2aacb210@bar.com
Subject: The more, the merrier
Date: Fri, 15 Jan 2016 00:12:43 +0100
Message-ID: <30@foo.bar.mail>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
It is more fun with more people. 𝗜 𝗮𝗺 𝗮 𝘀𝗶𝗻𝗴𝗹𝗲 person.

6
spec/requests/admin/email_controller_spec.rb
View File

@ -229,6 +229,12 @@ describe Admin::EmailController do
expect(response.status).to eq(200)
expect(response.body).to eq("email has been received and is queued for processing")
end
it "retries enqueueing with forced UTF-8 encoding when encountering Encoding::UndefinedConversionError" do
post "/admin/email/handle_mail.json", params: { email_encoded: Base64.strict_encode64(email('encoding_undefined_conversion')) }
expect(response.status).to eq(200)
expect(response.body).to eq("email has been received and is queued for processing")
end
end
describe '#rejected' do