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HTTP header: Content-Length integer is changing to string when flow runs

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Posted on by SJacobs

I have a flow with an HTTP action. The API I am sending the POST request to requires that I include a header called Content-Lengthwith an integer value. In the screenshot, you can see I'm entering an integer value, but after submit, the value is changed to a string, and the request is rejected for failing to include a valid Content-Length. I tried entering the value as a formula: int(1101) and I tried a compose action prior to this step where i ensured the value is an integer.

I also tried making up a random named header, entered an integer, and it's still getting converted to a string. Any ideas why this is happening, and how I might force it to remain an integer? Note that I have tested the same request in Postman and had no issues.

How do I create an HTTP request with a header that is a number? Thanks!!!

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SJacobs 71 on at

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Problem solved. After more experimentation, I got this to work. The error was not caused by the Content-Length header data type. In this case, it turned out that the Accept header, which in the screenshot above shows "*/*" needed to be defined explicitly. When I changed the value to Accept: application/json, the request was successful.

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v-jefferni on at

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Hi @SJacobs ,

Nice shoot! Please consider accept the apply as solution to help other users easily find it.

Best regards,

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special-analyst 18 on at

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I'm facing a very simmilar problem, but happens with a HTTP query. It's value is set to be an integer, but when the flow runs the value becomes a string. I'm gonna try some different "Accept" header values, but I'm already sending the accept header with application/json value. Any other idea?

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