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4a6bfc086c
Switched to POCO library for unified platform/library interface. Deprecated the external module API. It was creating more problems than solving. Removed most built-in libraries in favor of system libraries for easier maintenance. Cleaned and secured code with help from static analyzers.
425 lines
13 KiB
C++
425 lines
13 KiB
C++
//
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// URI.h
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//
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// Library: Foundation
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// Package: URI
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// Module: URI
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//
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// Definition of the URI class.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_URI_INCLUDED
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#define Foundation_URI_INCLUDED
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#include "Poco/Foundation.h"
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#include <vector>
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#include <utility>
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namespace Poco {
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class Path;
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class Foundation_API URI
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/// A Uniform Resource Identifier, as specified in RFC 3986.
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///
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/// The URI class provides methods for building URIs from their
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/// parts, as well as for splitting URIs into their parts.
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/// Furthermore, the class provides methods for resolving
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/// relative URIs against base URIs.
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///
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/// The class automatically performs a few normalizations on
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/// all URIs and URI parts passed to it:
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/// * scheme identifiers are converted to lower case
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/// * percent-encoded characters are decoded (except for the query string)
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/// * optionally, dot segments are removed from paths (see normalize())
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///
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/// Note that dealing with query strings requires some precautions, as, internally,
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/// query strings are stored in percent-encoded form, while all other parts of the URI
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/// are stored in decoded form. While parsing query strings from properly encoded URLs
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/// generally works, explicitly setting query strings with setQuery() or extracting
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/// query strings with getQuery() may lead to ambiguities. See the descriptions of
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/// setQuery(), setRawQuery(), getQuery() and getRawQuery() for more information.
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{
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public:
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using QueryParameters = std::vector<std::pair<std::string, std::string>>;
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URI();
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/// Creates an empty URI.
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explicit URI(const std::string& uri);
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/// Parses an URI from the given string. Throws a
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/// SyntaxException if the uri is not valid.
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explicit URI(const char* uri);
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/// Parses an URI from the given string. Throws a
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/// SyntaxException if the uri is not valid.
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URI(const std::string& scheme, const std::string& pathEtc);
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/// Creates an URI from its parts.
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URI(const std::string& scheme, const std::string& authority, const std::string& pathEtc);
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/// Creates an URI from its parts.
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URI(const std::string& scheme, const std::string& authority, const std::string& path, const std::string& query);
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/// Creates an URI from its parts.
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URI(const std::string& scheme, const std::string& authority, const std::string& path, const std::string& query, const std::string& fragment);
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/// Creates an URI from its parts.
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URI(const URI& uri);
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/// Copy constructor. Creates an URI from another one.
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URI(URI&& uri) noexcept;
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/// Move constructor.
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URI(const URI& baseURI, const std::string& relativeURI);
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/// Creates an URI from a base URI and a relative URI, according to
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/// the algorithm in section 5.2 of RFC 3986.
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explicit URI(const Path& path);
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/// Creates a URI from a path.
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///
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/// The path will be made absolute, and a file:// URI
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/// will be built from it.
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~URI();
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/// Destroys the URI.
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URI& operator = (const URI& uri);
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/// Assignment operator.
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URI& operator = (URI&& uri) noexcept;
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/// Move assignment.
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URI& operator = (const std::string& uri);
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/// Parses and assigns an URI from the given string. Throws a
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/// SyntaxException if the uri is not valid.
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URI& operator = (const char* uri);
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/// Parses and assigns an URI from the given string. Throws a
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/// SyntaxException if the uri is not valid.
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void swap(URI& uri);
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/// Swaps the URI with another one.
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void clear();
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/// Clears all parts of the URI.
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std::string toString() const;
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/// Returns a string representation of the URI.
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///
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/// Characters in the path, query and fragment parts will be
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/// percent-encoded as necessary.
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const std::string& getScheme() const;
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/// Returns the scheme part of the URI.
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void setScheme(const std::string& scheme);
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/// Sets the scheme part of the URI. The given scheme
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/// is converted to lower-case.
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///
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/// A list of registered URI schemes can be found
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/// at <http://www.iana.org/assignments/uri-schemes>.
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const std::string& getUserInfo() const;
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/// Returns the user-info part of the URI.
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void setUserInfo(const std::string& userInfo);
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/// Sets the user-info part of the URI.
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const std::string& getHost() const;
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/// Returns the host part of the URI.
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void setHost(const std::string& host);
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/// Sets the host part of the URI.
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unsigned short getPort() const;
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/// Returns the port number part of the URI.
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///
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/// If no port number (0) has been specified, the
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/// well-known port number (e.g., 80 for http) for
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/// the given scheme is returned if it is known.
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/// Otherwise, 0 is returned.
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void setPort(unsigned short port);
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/// Sets the port number part of the URI.
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unsigned short getSpecifiedPort() const;
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/// Returns the port number part of the URI.
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///
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/// If no explicit port number has been specified,
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/// returns 0.
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std::string getAuthority() const;
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/// Returns the authority part (userInfo, host and port)
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/// of the URI.
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///
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/// If the port number is a well-known port
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/// number for the given scheme (e.g., 80 for http), it
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/// is not included in the authority.
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void setAuthority(const std::string& authority);
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/// Parses the given authority part for the URI and sets
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/// the user-info, host, port components accordingly.
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const std::string& getPath() const;
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/// Returns the decoded path part of the URI.
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void setPath(const std::string& path);
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/// Sets the path part of the URI.
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std::string getQuery() const;
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/// Returns the decoded query part of the URI.
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///
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/// Note that encoded ampersand characters ('&', "%26")
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/// will be decoded, which could cause ambiguities if the query
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/// string contains multiple parameters and a parameter name
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/// or value contains an ampersand as well.
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/// In such a case it's better to use getRawQuery() or
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/// getQueryParameters().
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void setQuery(const std::string& query);
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/// Sets the query part of the URI.
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///
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/// The query string will be percent-encoded. If the query
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/// already contains percent-encoded characters, these
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/// will be double-encoded, which is probably not what's
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/// intended by the caller. Furthermore, ampersand ('&')
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/// characters in the query will not be encoded. This could
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/// lead to ambiguity issues if the query string contains multiple
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/// name-value parameters separated by ampersand, and if any
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/// name or value also contains an ampersand. In such a
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/// case, it's better to use setRawQuery() with a properly
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/// percent-encoded query string, or use addQueryParameter()
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/// or setQueryParameters(), which take care of appropriate
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/// percent encoding of parameter names and values.
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void addQueryParameter(const std::string& param, const std::string& val = "");
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/// Adds "param=val" to the query; "param" may not be empty.
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/// If val is empty, only '=' is appended to the parameter.
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///
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/// In addition to regular encoding, function also encodes '&' and '=',
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/// if found in param or val.
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const std::string& getRawQuery() const;
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/// Returns the query string in raw form, which usually
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/// means percent encoded.
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void setRawQuery(const std::string& query);
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/// Sets the query part of the URI.
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///
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/// The given query string must be properly percent-encoded.
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QueryParameters getQueryParameters() const;
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/// Returns the decoded query string parameters as a vector
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/// of name-value pairs.
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void setQueryParameters(const QueryParameters& params);
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/// Sets the query part of the URI from a vector
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/// of query parameters.
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///
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/// Calls addQueryParameter() for each parameter name and value.
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const std::string& getFragment() const;
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/// Returns the fragment part of the URI.
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void setFragment(const std::string& fragment);
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/// Sets the fragment part of the URI.
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void setPathEtc(const std::string& pathEtc);
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/// Sets the path, query and fragment parts of the URI.
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std::string getPathEtc() const;
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/// Returns the encoded path, query and fragment parts of the URI.
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std::string getPathAndQuery() const;
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/// Returns the encoded path and query parts of the URI.
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void resolve(const std::string& relativeURI);
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/// Resolves the given relative URI against the base URI.
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/// See section 5.2 of RFC 3986 for the algorithm used.
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void resolve(const URI& relativeURI);
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/// Resolves the given relative URI against the base URI.
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/// See section 5.2 of RFC 3986 for the algorithm used.
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bool isRelative() const;
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/// Returns true if the URI is a relative reference, false otherwise.
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///
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/// A relative reference does not contain a scheme identifier.
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/// Relative references are usually resolved against an absolute
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/// base reference.
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bool empty() const;
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/// Returns true if the URI is empty, false otherwise.
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bool operator == (const URI& uri) const;
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/// Returns true if both URIs are identical, false otherwise.
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///
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/// Two URIs are identical if their scheme, authority,
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/// path, query and fragment part are identical.
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bool operator == (const std::string& uri) const;
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/// Parses the given URI and returns true if both URIs are identical,
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/// false otherwise.
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bool operator != (const URI& uri) const;
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/// Returns true if both URIs are identical, false otherwise.
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bool operator != (const std::string& uri) const;
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/// Parses the given URI and returns true if both URIs are identical,
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/// false otherwise.
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void normalize();
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/// Normalizes the URI by removing all but leading . and .. segments from the path.
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///
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/// If the first path segment in a relative path contains a colon (:),
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/// such as in a Windows path containing a drive letter, a dot segment (./)
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/// is prepended in accordance with section 3.3 of RFC 3986.
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void getPathSegments(std::vector<std::string>& segments);
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/// Places the single path segments (delimited by slashes) into the
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/// given vector.
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static void encode(const std::string& str, const std::string& reserved, std::string& encodedStr);
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/// URI-encodes the given string by escaping reserved and non-ASCII
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/// characters. The encoded string is appended to encodedStr.
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static void decode(const std::string& str, std::string& decodedStr, bool plusAsSpace = false);
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/// URI-decodes the given string by replacing percent-encoded
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/// characters with the actual character. The decoded string
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/// is appended to decodedStr.
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///
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/// When plusAsSpace is true, non-encoded plus signs in the query are decoded as spaces.
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/// (http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.1)
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protected:
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bool equals(const URI& uri) const;
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/// Returns true if both uri's are equivalent.
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bool isWellKnownPort() const;
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/// Returns true if the URI's port number is a well-known one
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/// (for example, 80, if the scheme is http).
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unsigned short getWellKnownPort() const;
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/// Returns the well-known port number for the URI's scheme,
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/// or 0 if the port number is not known.
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void parse(const std::string& uri);
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/// Parses and assigns an URI from the given string. Throws a
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/// SyntaxException if the uri is not valid.
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void parseAuthority(std::string::const_iterator& it, const std::string::const_iterator& end);
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/// Parses and sets the user-info, host and port from the given data.
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void parseHostAndPort(std::string::const_iterator& it, const std::string::const_iterator& end);
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/// Parses and sets the host and port from the given data.
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void parsePath(std::string::const_iterator& it, const std::string::const_iterator& end);
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/// Parses and sets the path from the given data.
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void parsePathEtc(std::string::const_iterator& it, const std::string::const_iterator& end);
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/// Parses and sets the path, query and fragment from the given data.
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void parseQuery(std::string::const_iterator& it, const std::string::const_iterator& end);
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/// Parses and sets the query from the given data.
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void parseFragment(std::string::const_iterator& it, const std::string::const_iterator& end);
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/// Parses and sets the fragment from the given data.
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void mergePath(const std::string& path);
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/// Appends a path to the URI's path.
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void removeDotSegments(bool removeLeading = true);
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/// Removes all dot segments from the path.
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static void getPathSegments(const std::string& path, std::vector<std::string>& segments);
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/// Places the single path segments (delimited by slashes) into the
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/// given vector.
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void buildPath(const std::vector<std::string>& segments, bool leadingSlash, bool trailingSlash);
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/// Builds the path from the given segments.
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static const std::string RESERVED_PATH;
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static const std::string RESERVED_QUERY;
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static const std::string RESERVED_QUERY_PARAM;
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static const std::string RESERVED_FRAGMENT;
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static const std::string ILLEGAL;
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private:
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std::string _scheme;
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std::string _userInfo;
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std::string _host;
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unsigned short _port;
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std::string _path;
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std::string _query;
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std::string _fragment;
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};
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//
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// inlines
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//
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inline const std::string& URI::getScheme() const
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{
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return _scheme;
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}
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inline const std::string& URI::getUserInfo() const
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{
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return _userInfo;
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}
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inline const std::string& URI::getHost() const
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{
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return _host;
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}
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inline const std::string& URI::getPath() const
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{
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return _path;
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}
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inline const std::string& URI::getRawQuery() const
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{
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return _query;
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}
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inline const std::string& URI::getFragment() const
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{
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return _fragment;
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}
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inline unsigned short URI::getSpecifiedPort() const
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{
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return _port;
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}
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inline void swap(URI& u1, URI& u2)
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{
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u1.swap(u2);
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}
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} // namespace Poco
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#endif // Foundation_URI_INCLUDED
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