nextcloud / nextcloud/files_emailviewer
EML file is opened as blank PDF (invalid or broken PDF file)
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0. Needs triage
bug
needs info
- Dominant language
- JavaScript
- Stars
- 5
- Forks
- 1
- Avg merge
- 8h 44m
- Merged PRs (30d)
- 5
Description
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Steps to reproduce
- Install files_emailviewer and all the required dependencies
- Upload EML file
- Open that file
Expected behaviour
The file should be opened correctly in the browser
Actual behaviour
An "empty" file is opened in the PDF viewer
Additional information
The conversion works when executed directly on the commandline, e.g. sudo -u www-data java -jar /opt/mail/emailconverter-3.0.0-all.jar test.eml
Server configuration
Web server: Nginx
Database: PostgreSQL
PHP version: 8.3
Nextcloud version: 30.0.6
Browser
Browser name: Doesn't matter
Browser version: 124/125/…
Browser log
/apps/files/:1 Refused to apply style from 'https://domain.de/apps/contacts/css/contacts-index.css?v=1ebaba34-0' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled.
previewUtils-BnCbNhwl.chunk.mjs:6 [WARN] viewer: Some mimes were ignored because they are not enabled in the server previews config Object
log @ previewUtils-BnCbNhwl.chunk.mjs:6
session-heartbeat.js:83 session heartbeat polling started
Settings.js:24 A setting with the same name is already registered
register @ Settings.js:24
/core/preview?fileId=1321&x=32&y=32&mimeFallback=true&v=60961a&a=0:1
Failed to load resource: the server responded with a status of 404 ()
Error with Permissions-Policy header: Unrecognized feature: 'interest-cohort'.
Error with Permissions-Policy header: Unrecognized feature: 'attribution-reporting'.
Error with Permissions-Policy header: Unrecognized feature: 'run-ad-auction'.
Error with Permissions-Policy header: Unrecognized feature: 'private-state-token-redemption'.
Error with Permissions-Policy header: Unrecognized feature: 'private-state-token-issuance'.
Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'join-ad-interest-group'.
Error with Permissions-Policy header: Unrecognized feature: 'browsing-topics'.
Ungültige oder beschädigte PDF-Datei
PDF.js v4.0.189 (build: 50f52b43a)
Message: The PDF file is empty, i.e. its size is zero bytes.
_otherError @ viewer.mjs:11807
pdf.mjs:16329 Uncaught (in promise) InvalidPDFException: The PDF file is empty, i.e. its size is zero bytes.
1321:1 Refused to apply style from 'https://domain.de/apps/contacts/css/contacts-index.css?v=1ebaba34-0' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled.
Error with Permissions-Policy header: Unrecognized feature: 'interest-cohort'.
Error with Permissions-Policy header: Unrecognized feature: 'attribution-reporting'.
Error with Permissions-Policy header: Unrecognized feature: 'run-ad-auction'.
Error with Permissions-Policy header: Unrecognized feature: 'private-state-token-redemption'.
Error with Permissions-Policy header: Unrecognized feature: 'private-state-token-issuance'.
Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'join-ad-interest-group'.
Error with Permissions-Policy header: Unrecognized feature: 'browsing-topics'.
Ungültige oder beschädigte PDF-Datei
PDF.js v4.0.189 (build: 50f52b43a)
Message: The PDF file is empty, i.e. its size is zero bytes.
_otherError @ viewer.mjs:11807
_documentError @ viewer.mjs:11785
(anonymous) @ viewer.mjs:11713
pdf.mjs:16329 Uncaught (in promise) InvalidPDFException: The PDF file is empty, i.e. its size is zero bytes.
BaseExceptionClosure @ pdf.mjs:16329
266 @ pdf.mjs:16332
__webpack_require__ @ pdf.mjs:16738
(anonymous) @ pdf.mjs:15383
__webpack_require__.a @ pdf.mjs:16795
907 @ pdf.mjs:15338
__webpack_require__ @ pdf.mjs:16738
(anonymous) @ pdf.mjs:16836
Error with Permissions-Policy header: Unrecognized feature: 'interest-cohort'.
Error with Permissions-Policy header: Unrecognized feature: 'attribution-reporting'.
Error with Permissions-Policy header: Unrecognized feature: 'run-ad-auction'.
Error with Permissions-Policy header: Unrecognized feature: 'private-state-token-redemption'.
Error with Permissions-Policy header: Unrecognized feature: 'private-state-token-issuance'.
Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'join-ad-interest-group'.
Error with Permissions-Policy header: Unrecognized feature: 'browsing-topics'.
app.js:1146 Ungültige oder beschädigte PDF-Datei
PDF.js v4.0.189 (build: 50f52b43a)
Message: The PDF file is empty, i.e. its size is zero bytes.
_otherError @ app.js:1146
util.js:466 Uncaught (in promise) InvalidPDFException
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the EML upload and opening flow in files_emailviewer, then inspect the /core/preview request and compare its result with the command-line emailconverter-3.0.0-all.jar conversion described in the report. Done means opening the uploaded EML in the browser produces a non-empty, valid PDF instead of the PDF.js empty-file error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java, javascript
- Domain
- backend, frontend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Active
- Clarity
- Needs clarification
- Newbie friendliness
- 42/100