[BUG] [Golang] Bug make the http Body readable again

[Tsovak]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?
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Description

For Golang need to make HTTPResponse.Body readable again

Now after generating code, the generator read the Http Body one and closed it. After that user cannot read the Body again out the generated client. I suggest making the Body readable again.

openapi-generator version

4.2.3

Suggest a fix

Need to change in the templates localVarBody, err := _ioutil.ReadAll(localVarHTTPResponse.Body)
to

	localVarBody, err := _ioutil.ReadAll(localVarHTTPResponse.Body)
	localVarHTTPResponse.Body = _ioutil.NopCloser(bytes.NewBuffer(localVarBody))

[nmische]

I just ran into this issue yesterday and was planning to submit a similar bug report. Is there a PR open to address this issue?

[Tsovak]

@nmische I searched the existed PR but could not find it. I tried to open PR but I didn't have access. So we need to wait for the OpenAPI Team.

[wing328]

Thanks for the fix by @nmische

@Tsovak please pull the latest master or snapshot version to give it a try.