Attachments downloads instead of opening in a new tab

[dkrut]

Describe the Bug

After update allure from 2.23.1 to 2.24.0 changed behaviour opening attachments in report. When click to open attachment in new tab, download window opens.

Steps to Reproduce

1. Run test with adding attachment (for example, page source)
2. Generate report
   allure serve target/allure-results
3. Open test in a report
4. Click 'Open attachment in new tab'

Expected Behaviour

Attachment opens in new tab

Screenshots or Additional Context

import io.qameta.allure.Allure;
import org.junit.jupiter.api.Test;

import static com.codeborne.selenide.Selenide.open;
import static com.codeborne.selenide.WebDriverRunner.getWebDriver;

class AllureTest {
    public void attachPageSource() {
        String pageSource = getWebDriver().getPageSource();
        if (!pageSource.isEmpty()) {
            Allure.addAttachment("Page source", "text/html", pageSource, "html");
        }
    }

    @Test
    void attachSource() {
        open("http://google.com");
        attachPageSource();
    }
}

What Language are you using?

Java

What Framework/Allure Integration you are using?

allure-junit5

What version of Allure Integration you are using?

2.24.0

What version of Allure Report you are using?

2.24.0

Code of Conduct

• I agree to follow this project's Code of Conduct

[baev]

The behaviour changed due to single file mode support. For single-file reports, the only way to open attachments in the new tab is to use data links. And since all the browsers have limits for URL size, we decided to drop this feature (at least for now).

We aim to enable single-file mode by default for all users in future releases. Considering this, we prefer to avoid introducing any feature difference between classic & single-file modes.

However, we are open to hearing your feedback!

[biski]

For us this is a huge blocker. We have a few attachments like screenshot, logs, rest api logs etc and in case of failed we open them in new tabs. Now we cannot analyze more than two logs at the same time or even analyze a detailed log and compare it to steps from report. The possibility to open an attachment (or more than one) in a new tab is a great advantage of reports.

[baev]

We can create a separate report view that renders attachment content in full-screen mode. Will that suite your needs?

[biski]

But could we still open attachments in a new tab (for example by click middle mouse button)?

[baev]

The way I see it — a special route in the report that will only render attachment content and nothing else. You'll be able to open this link in a new browser tab (we can even set target _blank by default).

[quentinzil]

I am using this feature a lot, I just recently upgraded to the latest allure version and this is now a problem for me. Would there be a possibility to add an argument to revert back to having attachments open in new tabs if provided when generating a report? Thanks!

[biski]

I've noticed another problem with single-file report. Please take a look at our case. We have a report from weekend tests (100h, 25k test-cases). It contains a lot of test cases. Directory allure-results weighs 1G. When I generate a normal report, it works fast in browser. But when I generate a report in single-file mode and try to open using option "allure open" chrome hangs and finally tab crashes. File index.html weighs 1.5G.

[baev]

That's why Allure was implemented as a multi-file report in the first place. Why are you trying to use single-file mode for your reports? However, if you want the discussion to continue, please create a separate discussion topic since it's not directly related to this one.