Forwarded to devs Missing escape character in "additional webserver header" entries in nginx.conf file when quotation marks are used

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Missing escape character in "additional webserver header" entries in nginx.conf file when quotation marks are used

PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE

Obsidian 18.0.46, latest MU
CentOS 7.9

PROBLEM DESCRIPTION

I tried to enter an additional webserver header for Apache like

Link: <https://de-example.com>; rel="alternate"; hreflang="de", <https://en-example.com>; rel="alternate"; hreflang="en"

But when I run

# curl -I https://de-example.com

I get this result:

HTTP/1.1 200 OK
Server: nginx
Date: Thu, 25 Aug 2022 16:26:43 GMT
.
.
.
Link: <https://de-example.com>; rel="alternate"; hreflang="de", <https://en-example.com>; rel="alternate"; hreflang="en
X-Powered-By: PleskLin

--> The last double quotation mark " is missing from the added line. It should end with hreflang="en".

In the corresponding nginx.conf file of the subscription account, where these headers are placed, there seems to be an escape \ missing. The line there is

add_header "Link" "<https://de-example.com>; rel=\"alternate\"; hreflang=\"de\", <https://en-example.com>; rel=\"alternate\"; hreflang=\"en";

But it should be:

add_header "Link" "<https://de-example.com>; rel=\"alternate\"; hreflang=\"de\", <https://en-example.com>; rel=\"alternate\"; hreflang=\"en\";

STEPS TO REPRODUCE

1) In the GUI go to "additional webserver headers" and add

Link: <https://de-example.com>; rel="alternate"; hreflang="de", <https://en-example.com>; rel="alternate"; hreflang="en"

2) Save the configuration
3) Either look into /var/www/vhosts/<system>/de-example.com/conf/nginx.conf
or run

curl -I https://de-example.com

to see what's in the web server.

ACTUAL RESULT

Link: <https://de-example.com>; rel="alternate"; hreflang="de", <https://en-example.com>; rel="alternate"; hreflang="en

EXPECTED RESULT

Link: <https://de-example.com>; rel="alternate"; hreflang="de", <https://en-example.com>; rel="alternate"; hreflang="en"

ANY ADDITIONAL INFORMATION

The reason is that the last escape \ is missing from the nginx.conf configuration file when the line is saved.

YOUR EXPECTATIONS FROM PLESK SERVICE TEAM

Confirm bug

 

[IgorG]

Thank you, Peter.
Confirmed and submitted as PPPM-13695

 

[Kaspar]

This issue got solved in the 18.0.47 release.

When adding one or more custom headers to a website, the trailing double quote (“) character is no longer removed. (PPPM-13695)