[Question] Can't add 'set-cookie' headers via page.route fulfill?

[uriya2]

Context:

• Playwright Version: ^1.7.0

• Operating System: Ubuntu 16.04.4 LTS

• Node.js version: v12.18.1

• Browser: Chromium

Code Snippet

const playwright = require("playwright");

(async () => {
    for (const browserType of ['chromium']) {
        /** @type {import('playwright').Browser} */
        const browser = await playwright['chromium'].launch({ headless: false });
        const context = await browser.newContext();
        const page = await context.newPage();

        page.route('**/*', (route, request) => {
            let requestUrl = request.url();
            if (requestUrl.indexOf("sleeknote.com/Login/Login")>-1){
                let mockedResp = {
                    status: 200,
                    contentType: "application/json; charset=utf-8",
                    body: null,
                    headers:
                        {
                            "Access-Control-Allow-Credential": true,
                            "Access-Control-Allow-Headers": "Origin, Content-Type, X-Auth-Token",
                            "Access-Control-Allow-Methods": "GET, POST, PATCH, PUT, DELETE, OPTIONS",
                            "Access-Control-Allow-Origin": "*",
                            "Cache-Control": "private",
                            "Connection": "keep-alive",
                            "Content-Length": 9,
                            "Content-Type": "application/json; charset=utf-8",
                            "Set-Cookie": "A1",
                            "X-AspNet-Version": "4.0.30319",
                            "X-AspNetMvc-Version": "4.0",
                            "X-Powered-By": "ASP.NET"
                        }
                };
                route.fulfill(mockedResp)
            }else{
                route.continue();
            }
        })
        await page.goto('https://dashboard.sleeknote.com/login');
        await page.fill("#email", "email@email.com");
        await page.fill("#password", "q1w2e3r4");
        await page.click('[type="submit"]');
        await browser.close();
    }
})();

Describe the bug
hi,

As I'm trying to add multiple 'set-cookie' to the response header I noticed that even 1 'set-cookie' wasn't added. The rest of the headers are added just fine.
Also, any idea on how to add multiple headers to a response?

[mxschmitt]

Hi, good catch, seems definitely a valid use-case and from my point of view not yet possible. An array should be probably be accepted in the k/v pair too which then allows to set a header multiple times.

[pavelfeldman]

Any particular reason you are not using https://playwright.dev/docs/next/api/class-browsercontext#browsercontextaddcookiescookies? I acknowledge the bug, but figuring out why you hit it at the first place.

[uriya2]

@pavelfeldman Good question, I will check it as a workaround for these type of cookie, I wonder if it will work as I assume the login response is being consumed and executed to asses if a login action should be fired. Might be that setting those cookies won't have the desired affect. Will check none the less.

[dgozman]

Same issue as #4987.