Plugin link leads to 404

[derJake]

I ran into an issue when trying to use the extension plugin to generate a PDF of TYPO3 page containing a tx_news detail plugin. I've included the web2pdf plugin below the tx_news plugin expecting to be able to download a PDF version of the page when I click the "Print Current Page" link provided by web2pdf, yet I encounter a 404 "ERR_INVALID_RESPONSE" page.

I've tried to track the error through xdebug and the pdf file is generated and seems to be read by the middleware which returns a response object with response code 200 all the way to the TYPO3 bootstrapper.

Expected behaviour:
Clicking the plugin link returns a file stream with content-disposition header telling the browser to download the stream as a file.

Observed behaviour:
A 404 error is returned with error const "ERR_INVALID_RESPONSE" being shown in the browser window.

Steps to reproduce:

1. set up a TYPO3 10.4 installation via composer (e.g. TYPO3 composer helper)
2. configure DB etc. in DDEV
3. run composer require mittwald/web2pdf
4. include Typoscript in Template
5. put web2pdf plugin on page
6. Click "Print Current Page" on said page

Environment:
DDEV 1.16.2
PHP 7.4
MySQL 5.7
Apache 2.4.38
TYPO3 10.4.13

[derghostface]

I had the same problem when inserting the link on a record detail view. I solved it by adding addQueryStringMethod="GET" into the f:link.action in the GeneratePdfLink.html

[derJake]

@derghostface thanks for the suggestion!

Right now I had solved my problem by using the news view helper.
<n:link newsItem="{newsItem}" settings="{settings}" class="c-button" configuration="{additionalParams: '&tx_web2pdf_pi1[argument]=printPage'}">