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Info

"Access to fetch at ‘https://confluence.your_company_domain.com/rest/api/content’ from origin ‘http://jira.your_company_domain.com’ has been blocked"

or

"Network error or CORS is not configured on your Confluence instance"

... it's because Cross-Origin Resource Sharing (CORS) is not enabled for your Confluence Server as result the requests which are coming from Jira are not accepted.

To overcome please follow the instructions below

Stop Confluence server
Navigate to your confluence home directory (Usually for Linux: /opt/atlassian/confluence/)
Open confluence_home_directory/confluence/WEB-INF/
Backup web.xml
Open web.xml for editing

Add the flowing code block after the last <filter>...</filter>.

Info
Please replace "https://jira.your_company_domain.com" to your confluence URL.

Code Block

linenumbers	true

<filter>
  <filter-name>CorsFilter</filter-name>
  <filter-class >org.apache.catalina.filters.CorsFilter</filter-class >
  <init-param>
    <param-name>cors.allowed.origins</param-name>
    <param-value>https://jira.your_company_domain.com</param-value>
  </init-param>
  <init-param>
    <param-name>cors.allowed.methods</param-name>
    <param-value>OPTIONS,GET,POST,PUT,DELETE</param-value>
  </init-param>
  <init-param>
    <param-name>cors.exposed.headers</param-name>
    <param-value>Access-Control-Allow-Origin,Access-Control-Allow-Credentials</param-value>
  </init-param>

<init-param>
    <param-name>cors.allowed.headers</param-name>
    <param-value>X-Atlassian-Token,Authorization, Content-Type,X-Requested-With,accept,Origin,Access-Control-Request-Method,Access-Control-Request-Headers</param-value>
  </init-param>

  <init-param>
    <param-name>cors.support.credentials</param-name>
    <param-value>true</param-value>
  </init-param>
</filter>
<filter-mapping>
  <filter-name>CorsFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

Save changes
Start Confluence server and make sure that the server has been successfully started. If no, restore web.xml from backup

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Confluence Space to shortlist the parent pages
Parent page - any selected page within the Space defined
Page title - you can define a custom name of use some of our release/package variables to include in the naming. If such name already exists we will create a new version of the document.

Click “Export“.

Navigating to Confluence

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Versions Compared

Old Version 17

New Version 18

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