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Asked: 2026-05-11T08:39:19+00:00

Are urls of the form http://asdf.com/something.do?param1=true?param2=false valid? I don’t think the second ? is

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Are urls of the form http://asdf.com/something.do?param1=true?param2=false valid?

I don’t think the second ? is allowed in valid urls and that it should instead be an ampersand (&), but I’m unable to find anything about this in the http 1.1 rfc. Any ideas?

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  1. It is not valid to use ? again. ? should indicate the start of the parameter list. & should separate parameters.

    From RFC 3986:

    URI = scheme ':' hier-part [ '?' query ] [ '#' fragment ]

    From RFC 1738 :

    An HTTP URL takes the form:

    http:// <host> : <port> / <path> ? <searchpart>

    where <host> and <port> are as described in Section 3.1. If :<port> is omitted, the port defaults to 80. No user name or password is allowed. <path> is an HTTP selector, and <searchpart> is a query string. The <path> is optional, as is the <searchpart> and its preceding ‘?’. If neither <path> nor <searchpart> is present, the ‘/’ may also be omitted.

    Within the <path> and <searchpart> components, ‘/’, ‘;’, ‘?’ are reserved. The ‘/’ character may be used within HTTP to designate a hierarchical structure.

    The search part/query part is described here.

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