Vitaly Vitaly - 16 days ago 6
HTTP Question

Parameters in Path Segments of URL

There is one interesting thing in URL format:

Parameters in Path Segments of URL.

For more information see section "2.2.5" in

"O'Reilly - HTTP - The Definitive Guide".

or in official specification
https://www.ietf.org/rfc/rfc2396.txt
section 3.3.

This book can be found freely in Internet.

Let's consider the following URL:

http://www.example.com/first-segment/second-segment/index.html?type=HelloWorld


Here
/first-segment/second-segment/index.html
is a Path part of URL.


  1. And
    first-segment
    is a first segment of that Path

  2. second-segment
    is a second segment of that Path

  3. index.html
    is a third segment of that Path



It is stated in that book that each segment could have individual Parameters separated by semicolon ";". In our example it could be:

http://www.example.com/first-segment;f1=WWW/second-segment;s1=1;s2=2/index.html;i1=100;abc=200?type=HelloWorld



  1. Here
    f1
    - parameter for
    first-segment

  2. s1
    and
    s2
    - parameters for
    second-segment

  3. i1
    and
    abc
    parameters for
    index.html



The question is: do you know any practical examples of such Parameters in URLs?

Answer

I do not know any example of exactly parameters in the path segment.

But close example is connection and SFTP parameters in (expired) SFTP URL proposal.

There's one proposed connection parameter, the fingerprint for SSH host key fingerprint:

sftp://username:password;fingerprint=ssh-dss-0b-77-...@example.com/

And one proposed SFTP parameter, the typecode for transfer mode (ascii vs. binary). There's no official example, but it should be like:

sftp://username:password@example.com/path/file;typecode=i

(what actually, while semantically different, has the syntax of your "path" parameter)

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