Sentry returns 400 with the "premature end of input at line x column y" response

[YusufZiya]

Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/react

SDK Version

7.61.0

Framework Version

React 18.2.0

Link to Sentry event

No response

SDK Setup

Sentry.init({
dsn: "MY_DSN",
maxBreadcrumbs: 50,
debug: true,
});

Steps to Reproduce

I tried to integrate sentry to my existing react project which is generated via CRA. I added a button click handler in order to generate an error.

const foo = {};
foo.bar();

Sentry caught the error but when it sent to the server it responded like that.

{
"detail": "invalid event envelope",
"causes": [
"invalid envelope header",
"premature end of input at line 1 column 82"
]
}

Expected Result

Return 200

Actual Result

Http status code: 400

Response:

{
"detail": "invalid event envelope",
"causes": [
"invalid envelope header",
"premature end of input at line 1 column 82"
]
}

[lforst]

Hi, can you share the payload that was attempted to be sent? Thanks!

[YusufZiya]

Request Payload:

{"event_id":"f782814af21d4b3abe25868755c87ba4","sent_at":"2023-08-04T10:39:01.445","sdk":{"name":"sentry.javascript.react","version":"7.61.0"},"trace":{"environment":"production","public_key":"MY_PUBLIC_KEY","trace_id":"2557cd1435ad48899a70f6231bede4c9"}}
{"type":"event"}
{"exception":{"values":[{"type":"TypeError","value":"foo.bar is not a function","stacktrace":{"frames":[{"filename":"http://localhost:23235/cdn-bundles/fed.base.js?cache-disabled=false","function":"Aj","in_app":true,"lineno":78,"colno":351},{"filename":"http://localhost:23235/cdn-bundles/fed.base.js?cache-disabled=false","function":"Be","in_app":true,"lineno":79,"colno":62},{"filename":"http://localhost:23235/cdn-bundles/fed.base.js?cache-disabled=false","function":"Ce","in_app":true,"lineno":97,"colno":218},{"filename":"http://localhost:23235/cdn-bundles/fed.base.js?cache-disabled=false","function":"wg","in_app":true,"lineno":64,"colno":481},{"filename":"http://localhost:23235/cdn-bundles/fed.base.js?cache-disabled=false","function":"Tf","in_app":true,"lineno":221,"colno":448},{"filename":"http://localhost:23235/cdn-bundles/fed.base.js?cache-disabled=false","function":"?","in_app":true,"lineno":104,"colno":332},{"filename":"http://localhost:23235/cdn-bundles/fed.base.js?cache-disabled=false","function":"Xg","in_app":true,"lineno":95,"colno":1},{"filename":"http://localhost:23235/cdn-bundles/fed.base.js?cache-disabled=false","function":"gh","in_app":true,"lineno":94,"colno":93},{"filename":"http://localhost:23235/cdn-bundles/fed.base.js?cache-disabled=false","function":"nj","in_app":true,"lineno":66,"colno":171},{"filename":"http://localhost:23235/cdn-bundles/fed.base.js?cache-disabled=false","function":"kj","in_app":true,"lineno":66,"colno":117},{"filename":"http://localhost:23235/cdn-bundles/fed.base.js?cache-disabled=false","function":"Object.lj","in_app":true,"lineno":255,"colno":217},{"filename":"http://localhost:3000/static/js/main.bundle.js","function":"NewCustomerButton._this.onClick","in_app":true,"lineno":296256,"colno":67},{"filename":"http://localhost:3000/static/js/main.bundle.js","function":"Object.onClick","in_app":true,"lineno":297674,"colno":25},{"filename":"http://localhost:3000/static/js/main.bundle.js","function":"HeaderBarTop.handleAsd","in_app":true,"lineno":297644,"colno":11}]},"mechanism":{"type":"instrument","handled":true,"data":{"function":"addEventListener","handler":"bound Aj","target":"EventTarget"}}}]},"level":"error","event_id":"f782814af21d4b3abe25868755c87ba4","platform":"javascript","timestamp":1691134741.438,"environment":"production","sdk":{"integrations":["InboundFilters","FunctionToString","TryCatch","Breadcrumbs","GlobalHandlers","LinkedErrors","Dedupe","HttpContext"],"name":"sentry.javascript.react","version":"7.61.0","packages":[{"name":"npm:@sentry/react","version":"7.61.0"}]},"breadcrumbs":[{"timestamp":1691134703.962,"category":"fetch","data":{"method":"GET","url":"http://localhost:6001/api/v1/uygulama-altyapi/cache-altyapilari/arabellekverileri/SUBELER","status_code":200},"type":"http"},{"timestamp":1691134703.964,"category":"fetch","data":{"method":"GET","url":"http://localhost:6001/api/v1/uygulama-altyapi/cache-altyapilari/arabellekverileri/EFT_SUBELER","status_code":200},"type":"http"},{"timestamp":1691134704.102,"category":"fetch","data":{"method":"POST","url":"http://localhost:6001/api/v1/uygulama-altyapi/guvenlik-altyapisi/finartkullanicioturumpozisyonlari","status_code":200},"type":"http"},{"timestamp":1691134704.166,"category":"fetch","data":{"method":"GET","url":"http://localhost:6001/api/v1/uygulama-altyapi/cache-altyapilari/arabellekverileri/DYNAMICVALUES","status_code":200},"type":"http"},{"timestamp":1691134704.843,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/common-hcz/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134704.844,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/reporting-client/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134704.844,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/call-center-client/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134705.228,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/business-forms/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134705.236,"category":"fetch","data":{"method":"GET","url":"http://localhost:6001/api/v1/uygulama-altyapi/guvenlik-altyapisi/kullaniciekranyetkiislemleri?filter={"kullaniciKod":"HAKARLAR","screenId":"SOSM360G","metroMenuTanımı":false,"disableUpdateScreenStatistic":true}","status_code":200},"type":"http"},{"timestamp":1691134705.236,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/business-common/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134705.237,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/base-components/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134705.674,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/uDisardanErisilenFormlar/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134705.683,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/opc-session/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134705.687,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/cZorunluBilgi/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134705.761,"category":"fetch","data":{"method":"GET","url":"http://localhost:6001/api/v1/uygulama-altyapi/cache-altyapilari/arabellekverileri/MESAJLAR","status_code":200},"type":"http"},{"timestamp":1691134705.763,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/zt-session-router/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134705.764,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/cVKNDogrulama/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134706.556,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/cMusteriUrun/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134706.605,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/common-mvt/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134706.61,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/common-eft/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134706.613,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/ex-stacktrace-js/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134706.614,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/fis-dokuman/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134706.614,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/cTalimatVekalet/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134706.76,"category":"fetch","data":{"method":"GET","url":"http://localhost:6001/api/v1/uygulama-altyapi/guvenlik-altyapisi/kullaniciekranyetkiislemleri?filter={"kullaniciKod":"HAKARLAR","screenId":"SOSMMASA","metroMenuTanımı":false,"disableUpdateScreenStatistic":true}","status_code":200},"type":"http"},{"timestamp":1691134706.948,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/scanner-client/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134706.948,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/cKimlik/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134706.948,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/oc-utils/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134706.992,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/ex-react-luckysheet/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134707.113,"category":"fetch","data":{"method":"POST","url":"http://localhost:6001/api/v1/uygulama-altyapi/frame/zfugirisbilgileri","status_code":200},"type":"http"},{"timestamp":1691134707.617,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/imaging-client/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134707.618,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/common-ecm/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134707.62,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/cImageViewer/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134707.622,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/common-mas-masrafbilgi/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134707.623,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/common-hzn/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134707.791,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/common-eft-merkezbankasi/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134707.908,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/cDocumentTree/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134707.91,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/rprguide-app/dependencies.json?cache-disabled=false","status_code":404},"type":"http"},{"timestamp":1691134708.264,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/cImageCrop/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134708.267,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/ex-file-type/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134708.402,"category":"fetch","data":{"method":"GET","url":"http://localhost:3000/dependencies.json","status_code":200},"type":"http"},{"timestamp":1691134708.58,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/cImageDocumentViewer/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134708.884,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/fed-zfu-adapter/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134708.99,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/iframe-utils/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134708.99,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/uKlavuzFiyatlama/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134708.991,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/uKilavuzAnalitik/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134709.014,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/uKlavuz/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134709.359,"category":"fetch","data":{"method":"GET","url":"http://localhost:23235/ex-react-pdf/dependencies.json?cache-disabled=false","status_code":200},"type":"http"},{"timestamp":1691134717.267,"category":"console","data":{"arguments":["G2 tracks nothing ;-)"],"logger":"console"},"level":"warning","message":"G2 tracks nothing ;-)"},{"timestamp":1691134718.101,"category":"console","data":{"arguments":["Component registration on window completed for cSube"],"logger":"console"},"level":"info","message":"Component registration on window completed for cSube"},{"timestamp":1691134741.429,"category":"ui.click","message":"div.addNewCustomerWrapper > span.addNewCustomer > i.fas.fa-user-plus"}],"request":{"url":"http://localhost:3000/home","headers":{"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36"}},"extra":{"arguments":[{"type":"click","target":"div.addNewCustomerWrapper > span.addNewCustomer > i.fas.fa-user-plus","currentTarget":" > html.hydrated > body > div#root","isTrusted":true}]},"contexts":{"trace":{"trace_id":"2557cd1435ad48899a70f6231bede4c9","span_id":"b57d46339583f23b"}}}

Thanks.

[lforst]

Ok seems like there is a Z missing at the end of the sent_at timestamp in the envelope header. We'll investigate.

[lforst]

Date.toISOString() which we use to generate this string always has a Z at the end. Are you using any library that might be modifying the time methods?

I have a feeling that this is not on the SDK since many many people would report this and we would be missing a lot of events.

[YusufZiya]

Hello, thanks for your investigation.

We override the toISOString method to return "YYYY-MM-DDTHH:mm:ss.SSS" and many teams in our company use this method. So we can't take it back. :(
Is there any chance to change the "sent_at" field before sentry send the events? Or do you have any advice to solve this problem?

Thanks :)

[lforst]

@YusufZiya since Date.toISOString() is a built-in method, I think it is fair for the SDK to assume it works as expected. Theoretically, there is a beforeEnvelope hook you can use but it's a pretty internal API and not documented very well. Other than that there is no way I believe.

I also don't think it is worth it for us to add a way to configure the sent_at field, which is why I am gonna close this issue. Feel free to reach out if you have more questions!