nix-super/src/libutil/url.hh
John Ericson b59a7a14c4 Add StoreReference::render
This will be needed for the next step.

Also allows us to write round trip tests.
2024-05-22 09:20:15 -04:00

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#pragma once
///@file
#include "error.hh"
namespace nix {
struct ParsedURL
{
std::string url;
/// URL without query/fragment
std::string base;
std::string scheme;
std::optional<std::string> authority;
std::string path;
std::map<std::string, std::string> query;
std::string fragment;
std::string to_string() const;
bool operator ==(const ParsedURL & other) const;
/**
* Remove `.` and `..` path elements.
*/
ParsedURL canonicalise();
};
MakeError(BadURL, Error);
std::string percentDecode(std::string_view in);
std::string percentEncode(std::string_view s, std::string_view keep="");
std::map<std::string, std::string> decodeQuery(const std::string & query);
std::string encodeQuery(const std::map<std::string, std::string> & query);
ParsedURL parseURL(const std::string & url);
/**
* Although thats not really standardized anywhere, an number of tools
* use a scheme of the form 'x+y' in urls, where y is the “transport layer”
* scheme, and x is the “application layer” scheme.
*
* For example git uses `git+https` to designate remotes using a Git
* protocol over http.
*/
struct ParsedUrlScheme {
std::optional<std::string_view> application;
std::string_view transport;
};
ParsedUrlScheme parseUrlScheme(std::string_view scheme);
/* Detects scp-style uris (e.g. git@github.com:NixOS/nix) and fixes
them by removing the `:` and assuming a scheme of `ssh://`. Also
changes absolute paths into file:// URLs. */
std::string fixGitURL(const std::string & url);
/**
* Whether a string is valid as RFC 3986 scheme name.
* Colon `:` is part of the URI; not the scheme name, and therefore rejected.
* See https://www.rfc-editor.org/rfc/rfc3986#section-3.1
*
* Does not check whether the scheme is understood, as that's context-dependent.
*/
bool isValidSchemeName(std::string_view scheme);
}