76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
/* file EndpointDescr.hpp
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*
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* author: Roland Conybeare, Sep 2022
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*/
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#pragma once
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#include "web_util/Alist.hpp"
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#include "refcnt/Refcounted.hpp"
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#include "indentlog/print/tag.hpp"
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#include "indentlog/print/tostr.hpp"
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#include <functional>
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namespace xo {
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namespace web {
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/* a function that can deliver http content on demand. */
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using HttpEndpointFn = std::function<void (std::string const &,
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Alist const &,
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std::ostream *)>;
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/* describes an http endpoint --
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* this comprises:
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* - a uri pattern.
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* - a function that can deliver http content on demand
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*/
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class HttpEndpointDescr {
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public:
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HttpEndpointDescr(std::string uri_pattern,
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HttpEndpointFn endpoint_fn)
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: uri_pattern_{std::move(uri_pattern)},
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endpoint_fn_{std::move(endpoint_fn)}
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{}
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std::string const & uri_pattern() const { return uri_pattern_; }
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HttpEndpointFn const & endpoint_fn() const { return endpoint_fn_; }
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void display(std::ostream & os) const {
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using xo::xtag;
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os << "<HttpEndpointDescr" << xtag("uri_pattern", uri_pattern_) << ">";
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} /*display*/
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std::string display_string() const { return xo::tostr(*this); }
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private:
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/* unique pattern in URI-space for this endpoint.
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* for example
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* .uri_pattern = /stem/${foo}/${bar}
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* means this endpoint generates contents for uri's
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* /stem/apple/banana
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* /stem/aphid/green
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* but not for
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* /stem/apple/banana/carrot
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*/
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std::string uri_pattern_;
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/* a function that can construct http output on demand
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* .endpoint_fn(uri, alist, &os)
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* writes http output to os. output is parameterized
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* by name-value pairs in alist, and is prepared on behalf
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* of .uri_pattern
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* alist will report name-value pairs for each variable that
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* appears in .uri_pattern (surrounded by ${..})
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*/
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HttpEndpointFn endpoint_fn_;
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}; /*HttpEndpointDescr*/
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inline std::ostream &
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operator<<(std::ostream & os, HttpEndpointDescr const & x) {
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x.display(os);
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return os;
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} /*operator<<*/
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} /*namespace web*/
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} /*namespace xo*/
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/* end EndpointDescr.hpp */
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