net/url: QueryEscape() doesn't escape tilde

[alive]

What version of Go are you using (go version)?

$ go version
go version go1.16.6 darwin/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

see go version

What did you do?

https://play.golang.org/p/meXdB3_Iklu

What did you expect to see?

I expected to see the tilda characters converted to their URL escaped values: %7E.

What did you see instead?

The tilda characters were not converted.

According to this: https://jkorpela.fi/tilde.html tildas are no long a character that must be encoded. However, I think they still should be for safety, or at least there should be an option to encode them. Chrome browser, for example, still encodes tildas in the body of a post request, which is where my use case lies.

[seankhliao]

That page refers to an obsoleted RFC

From the current RFC 3986 Section 2.3:

For consistency, percent-encoded octets in the ranges of ALPHA
(%41-%5A and %61-%7A), DIGIT (%30-%39), hyphen (%2D), period (%2E),
underscore (%5F), or tilde (%7E) should not be created by URI
producers and, when found in a URI, should be decoded to their
corresponding unreserved characters by URI normalizers.

What specific usecase requires an escaped tilde?

[alive]

that section of the RFC refers to URI only, not post body data, correct?
in my specific case, I'm trying to send an http post request to a website and the tilda character present in the post data not being encoded caused a bug.
Chrome,firefox,etc all encode '~' in the body of a post request, so I think Go should consider doing that as well.

[gopherbot]

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