MailJet broken on Cloudflare workers due to Axios RequestInitializerDict being broken in 1.7.4 (fixed in 1.7.5)

[robert-hoffmann]

Mailjet is broken on Cloudflare, and when using NuxtJS projects deployed on NuxtHub

Sending a mail triggers a 500 error : The 'credentials' field on 'RequestInitializerDict' is not implemented.

This is apparently due to this issue with Axios https://github.com/axios/axios/issues/6565

As mentioned here https://github.com/axios/axios/issues/6565#issuecomment-2327408217

Solution: Upgrade MailJet Axios dependency to at least 1.7.5 (currently 1.7.7)

[robert-hoffmann]

Here is the full error message from mailjet api

{
    "result": {
        "config": {
            "transitional": {
                "silentJSONParsing": true,
                "forcedJSONParsing": true,
                "clarifyTimeoutError": false
            },
            "adapter": [
                "xhr",
                "http",
                "fetch"
            ],
            "transformRequest": [
                null
            ],
            "timeout": 0,
            "xsrfCookieName": "XSRF-TOKEN",
            "xsrfHeaderName": "X-XSRF-TOKEN",
            "maxContentLength": -1,
            "maxBodyLength": -1,
            "env": {},
            "headers": {
                "Accept": "application/json, text/plain, */*",
                "Content-Type": "application/json",
                "User-Agent": "mailjet-api-v3-nodejs/6.0.6"
            },
            "url": "https://api.mailjet.com/v3.1/send",
            "params": {},
            "data": "{\"Messages\":[{\"From\":{\"Email\":\"[email protected]\",\"Name\":\"Noreply redacted Digital\"},\"To\":[{\"Email\":\"[email protected]\",\"Name\":\"redacted redacted\"}],\"Subject\":\"A test email\",\"TextPart\":\"test message\",\"HTMLPart\":\"test message\"}]}",
            "method": "post",
            "responseType": "json",
            "auth": {
                "username": "redacted",
                "password": "redacted"
            }
        },
        "response": null,
        "statusCode": null,
        "statusText": null,
        "originalMessage": "The 'credentials' field on 'RequestInitializerDict' is not implemented.",
        "message": "Unsuccessful: Error Code: \"undefined\" Message: \"The 'credentials' field on 'RequestInitializerDict' is not implemented.\""
    }
}

[robert-hoffmann]

I actually haven't been able to resolve this using overrides in my package.json (maybe i have some caching issues on cloudflare)

In any case, according to the issues on axios, this seems on their end, and resolved currently

[robert-hoffmann]

So, i worked around this by using the api directly: https://api.mailjet.com/v3/send (https://dev.mailjet.com/email/reference/send-emails#v3_post_send)

Maybe remove dependencies from Axios, and simply implement the fetch yourself ?

If you need advanced functionality over fetch, have a look at ofetch, which is what is used in nuxt and other libraries, and uses fetch under the hood, which is compatible in both browser and nodejs clients

https://github.com/unjs/ofetch

Btw, you could add an example on the API page, showing how to use JS to do the fetch stuff

Here what i replaced the nodejs library with:

function sendEmail(data) {
  const url  = 'https://api.mailjet.com/v3/send';
  const body = {
    "FromEmail" : data.fromEmail,
    "FromName"  : data.fromName,
    "Subject"   : data.subject,
    "Text-part" : data.text,
    "Html-part" : data.html,
    "Recipients": [
      { "Email": data.email, "Name": data.name }
    ]
  };
  
  return fetch(url, {
    method : 'POST',
    headers: {
      'Content-Type' : 'application/json',
      'Authorization': `Basic ${process.env.MJ_APIKEY_PUBLIC}:${process.env.MJ_APIKEY_PRIVATE}`
    },
    body: JSON.stringify(body)
  })
}

[Maze-fr]

There is the cURL example here : https://dev.mailjet.com/email/guides/send-api-v31/
It's easy to adapt to JS fetch.
But I get CORS error...

[robert-hoffmann]

But I get CORS error...

You can't use this on the client, which i suppose you are doing (maybe with some tweaks, but probably not)

My fetch code is executed on the server by nodejs, not in the browser. Also often companies like MailJet will deny usage in the browser (cors), because that means you are exposing your secret keys to the whole world

This works fine on the server (easy to adapt to plain java, c#, php, etc), without using any library dependency:

https://github.com/mailjet/mailjet-apiv3-nodejs/issues/285#issuecomment-2407009629

[Maze-fr]

But I get CORS error...

You can't use this on the client, which i suppose you are doing (maybe with some tweaks, but probably not)

My fetch code is executed on the server by nodejs, not in the browser. Also often companies like MailJet will deny usage in the browser (cors), because that means you are exposing your secret keys to the whole world

That makes sense...
And it's also written here : https://github.com/mailjet/mailjet-apiv3-nodejs