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cy.request causing 400 status due to missing Host header

See original GitHub issue

Current behavior

I am using cy.request to simulate user behaviour.

It appears that Cypress does not send the Host header, which makes my (cloudflare-gated) api reject the request.

https://my_apicall.com/

The response we received from your web server was:

  > 400: Bad Request

This was considered a failure because the status code was not `2xx` or `3xx`.

If you do not want status codes to cause failures pass the option: `failOnStatusCode: false`

-----------------------------------------------------------

The request we sent was:

Method: GET
URL: https://my_apicall.com/
Headers: {
  "Connection": "keep-alive",
  "user-agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Cypress/9.4.1 Chrome/94.0.4606.81 Electron/15.3.4 Safari/537.36",
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "content-type": "application/json",
  "content-length": 83,
  "referer": "https://my_apicall.com/"
}

Redirects: [
  "307: https://my_apicall.com/expected_redirect"
]

-----------------------------------------------------------

The response we got was:

Status: 400 - Bad Request
Headers: {
  "date": "Mon, 21 Feb 2022 14:14:55 GMT",
  "content-type": "text/html; charset=UTF-8",
  "transfer-encoding": "chunked",
  "connection": "keep-alive",
  "referrer-policy": "no-referrer",
  "accept-ranges": "bytes",
  "x-served-by": "cache-iad-kiad7000064-IAD",
  "x-cache": "MISS",
  "x-cache-hits": "0",
  "x-timer": "S1645452895.319054,VS0,VE0",
  "cf-cache-status": "DYNAMIC",
  "expect-ct": "max-age=604800, report-uri=\"https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct\"",
  "report-to": "{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=wYuVS5epYzpLY8Q4hM8ZId0we2tHSErWBDPwW7tLSOmWHAfExOyK8y27u9bPocmpg5oYp2xAcKgOvSMfjo1nT2vcU077sCIfdYD70PO5cePeF%2BDjvSIcB0sz4OqC7rg%3D\"}],\"group\":\"cf-nel\",\"max_age\":604800}",
  "nel": "{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}",
  "server": "cloudflare",
  "cf-ray": "6e109573bdfe5a46-IAD",
  "alt-svc": "h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400"
}
Body: <!DOCTYPE html>

Desired behavior

Send the Host header so that they are valid according to rfc7230 5.4.

Test code to reproduce

Attempt to call an API that forces strict RFC compliance: fail.

Manually add Host using cy.request( { headers: { Host: ... } } ): success.

Cypress Version

9.5.0

Other

No response

Issue Analytics

  • State:closed
  • Created 2 years ago
  • Comments:5 (1 by maintainers)

github_iconTop GitHub Comments

1reaction
sainthkhcommented, Apr 11, 2022

I checked the rfc7230 5.4.

And it says that:

A client MUST send a Host header field in all HTTP/1.1 request messages.

And Cypress is ignoring this.

0reactions
Urhy3lcommented, Oct 19, 2022

Hi! I’m having a similar issue. The request I’m sending is like follows:

cy.request({
    method: 'POST',
    url: 'http://myUrl.com/a/nice/path',
    body: {email: email},
});

And it fails:

The request we sent was:

Method: POST
URL: http://backend-openpay-pe.test.geopagos.com/api/registrations/send-code
Headers: {
  "Connection": "keep-alive",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/106.0.5249.119 Safari/537.36",
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "referer": "aNiceReferer"
}
Redirects: [
  "308: http://myUrl.com/a/nice/path"
]

And the status code from the response is 404.

When I try to set the host header as follows:

cy.request({
  method: 'POST',
  headers: {
    host: 'myUrl.com',
  },
  url: 'http://myUrl.com/a/nice/path',
})

The log from Cypress was:


The request we sent was:

Method: POST
URL: http://backend-openpay-pe.test.geopagos.com/api/registrations/send-code
Headers: {
  "Connection": "keep-alive",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/106.0.5249.119 Safari/537.36",
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "referer": "http://myUrl.com/a/nice/path"
}
Redirects: [
  "308: http://myUrl.com/a/nice/path"
]

And again, a response with 404. What I can see in the previous response, is that Cypress is not sending the host header, even when I manually set it. I tried testing some other headers:

cy.request({
  method: 'POST',
  headers: {
    host: 'myUrl.com',
    banana: 'MonkeyLikesBananas',
  },
  url: 'http://myUrl.com/a/nice/path',
})

And the log was:

The request we sent was:

Method: POST
URL: http://backend-openpay-pe.test.geopagos.com/api/registrations/send-code
Headers: {
  "Connection": "keep-alive",
  "banana": "MonkeyLikesBananas",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/106.0.5249.119 Safari/537.36",
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "referer": "http://myUrl.com/a/nice/path"
}
Redirects: [
  "308: http://myUrl.com/a/nice/path"
]

Again, Cypress seems to correctly send any header I set, except for host, that for some reason is missing there.

Cypress version:

$ npx cypress -v      
Cypress package version: 10.9.0
Cypress binary version: 10.9.0
Electron version: 19.0.8
Bundled Node version: 16.14.2

Any help will be welcome.

Thanks!

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