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author | Tim Bunce <Tim.Bunce@pobox.com> | 2010-11-23 13:30:57 +0000 |
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committer | Tim Bunce <Tim.Bunce@pobox.com> | 2010-11-23 13:30:57 +0000 |
commit | db3585960c906395100c0233e738fbe8b4396af6 (patch) | |
tree | 087cb35ef08771b575811db98c8047d8fd8bfa4e /spec/spore_implementation.pod | |
parent | Add is_success method to Net/HTTP/Spore/Response.pm (diff) | |
download | net-http-spore-db3585960c906395100c0233e738fbe8b4396af6.tar.gz |
Remove outdated spec/ files. Add github.com/SPORE/specifications link to docs.
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-rw-r--r-- | spec/spore_implementation.pod | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/spec/spore_implementation.pod b/spec/spore_implementation.pod deleted file mode 100644 index 1e1ee3e..0000000 --- a/spec/spore_implementation.pod +++ /dev/null @@ -1,255 +0,0 @@ -=encoding utf-8 - -=head1 NAME - -Spore (Specifications to a POrtable Rest Environment) Client Implementation - -=head1 ABSTRACT - -Spore is a specification for describing ReST API that can be parsed and used -automatically by client implementations to communicate with the descibed API. - -This document describes what features are required in a Spore client -implementation. - -=head1 TERMINOLOGY - -=over 4 - -=item API - -An I<API> is a ReST application that can exchange data with client -applications over http/https. It presents one or more method endpoints which -accept http requests with varying headers, parameters and body content to -perform specific operations. - -=item Client implementation - -A I<Client implementation> is a library targeting a specific system or -language. It can use I<Descriptions files> to create programmatic interfaces -usable in applications. - -=item Description file - -A I<Description file> is a file in JSON format describing an I<API> (see -specification). It can directly be used by a I<Client implementation> to -create a programmatic interface in the target system. - -=item Middleware - -A I<Middleware> is Spore component that is added to the workflow of -the I<Client implementation> to modify the I<Requests> and -I<responses> sent and received. It can also shortcircuit the rest of -the workflow if needed. It can be thought of a plugin to extend Spore. - -=item Request - -A I<Request> is a data structure that contains standardized data and -metadata inspired by the CGI specification. It is used by the I<Client -implementation> to create the http request that will be sent to the -I<API>. - -=item Response - -A I<Response> is a data structure that contains standardized data and -metadata inspired by the CGI specification. It is created from the -http response sent by the I<API> and is used after being processed by -the I<Middlewares> to create the structure returned to the user. - -=back - -=head1 SPECIFICATION - -=head2 Client Implementation - -A I<Client implementation> B<MUST> provide a function or method -(eg. new_from_spec) to generate the specific API methods in the target -system by reading the JSON string from a I<Description file> (and -optionaly directly from the file itself). - -A I<Client implementation> B<MUST> also provide a method to enable or -disable spore middlewares at runtime. The order in which the -middlewares are enambled is the order in which the request will go -through each middleware, and the inverse order in which the response -will go through each optional middleware postprocessing callback. - - If middlewares I<A>, I<B> and I<C> were enabled in this order, then - the processing order will be: - I<A>, I<B>, I<C> ... make request ... I<C>, I<B>, I<A> - -=head2 Middleware - -Each middleware B<MUST> accept arbitrary initialization parameters. It -B<MUST> also provide a function to which the request environment or an -object containing it will be passed. The function can have 3 types of -return values : - -=over 4 - -=item Nothing - -Control is passed to the next middleware in the chain. - -=item A callback - -Control is passed to the next middleware in the chain. The callback is -stored and will be passed the response later on after the request is -made. - -=item A response - -The response is directly passed to the first stored callback in the -chain. No further middlewares are used and no request is sent. Useful -if a middleware needs to shortcicuit the remaining of the chain, for -testing or caching purpose for exemple. - -=back - -=head3 The Request environment - -The request environment B<MUST> be a data structure that includes -CGI-like headers, as detailed below. Each middleware is free to modify -the environment. The environment B<MUST> include these keys (adopted -from L<PEP 333|http://www.python.org/dev/peps/pep-0333/>, -L<Rack|http://rack.rubyforge.org/doc/files/SPEC.html>, -L<PSGI|http://search.cpan.org/perldoc?PSGI> and -L<JSGI|http://jackjs.org/jsgi-spec.html>) except when they would -normally be empty. The environment is used by the I<Client -implementation> to build the final http request that will be sent to -the I<API>. - -=over 4 - -=item * - -C<REQUEST_METHOD>: The HTTP request method, such as "GET" or -"POST". This B<MUST NOT> be an empty string, and so is always -required. - -=item * - -C<SCRIPT_NAME>: The initial portion of the base URL's path, minus the -schema and domain name. This tells the client what is the API virtual -"location". This may be an empty string if the method corresponds to -the server's root URI. - -If this key is not empty, it B<MUST> start with a forward slash (C</>). - -=item * - -C<PATH_INFO>: The remainder of the request URL's path, designating the -virtual "location" of the request's target within the API. This may be -an empty string if the request URL targets the application root and -does not have a trailing slash. It still contains the placeholders -which will be interpolated later with the params. - -If this key is not empty, it B<MUST> start with a forward slash (C</>). - -=item * - -C<REQUEST_URI>: The undecoded, raw request URL line. It is the raw URI -path and query part that appears in the HTTP C<GET /... HTTP/1.x> line -and doesn't contain URI scheme and host names. It still contains the -placeholders which will be interpolated later with the params. - -=item * - -C<SERVER_NAME>, C<SERVER_PORT>: When combined with C<SCRIPT_NAME> and -C<PATH_INFO>, these keys can be used to complete the URL. Note, -however, that C<HTTP_HOST>, if present, should be used in preference -to C<SERVER_NAME> for reconstructing the request URL. C<SERVER_NAME> -and C<SERVER_PORT> B<MUST NOT> be empty strings, and are always -required. - -=item * - -C<QUERY_STRING>: The portion of the request URL that follows the ?, if -any. May be empty, but is always required. It will always be empty -before the request is actually made and sent. - -=item * - -C<spore.payload>: The actual content body of the call. Modified in -place by the middlewares. - -=item * - -C<spore.params>: A list of key/value pairs. These will be interpolated -in the url with the placeholders when the request is made. The rest of -them will be used in the C<QUERY_STRING> part of the uri. B>MAY> be -empty but B<MUST> always be present. - -=item * - -C<spore.scheme>: !!! Check if url_scheme !! The scheme of the url. - - -=item * - -C<spore.scheme>: !!! Check if url_scheme !! The scheme of the url. - -=back - -=head1 CHANGELOGS - -0.1: 2010.10.xx - -=over 4 - -=item * - -Initial version. - -=back - -=head1 ACKNOWLEDGEMENTS - -Some parts of this specification are adopted from the following specifications. - -=over 4 - -=item * - -PSGI Specification L<PSGI|http://search.cpan.org/perldoc?PSGI> - -=item * - -PEP333 Python Web Server Gateway Interface L<http://www.python.org/dev/peps/pep-0333> - -=item * - -Rack L<http://rack.rubyforge.org/doc/SPEC.html> - -=item * - -JSGI Specification L<http://jackjs.org/jsgi-spec.html> - -=back - -I'd like to thank authors of these great documents. - -=head1 AUTHOR - -=over 4 - -=item franck cuny - -=item nils grunwald - -=back - -=head1 CONTRIBUTORS - -=over 4 - -=item damien "bl0b" leroux - -=back - -=head1 COPYRIGHT AND LICENSE - -Copyright XXX, 2010. - -This document is licensed under the Creative Commons license by-sa. - -=cut |