Http.hpp

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// @formatter:off
//
// Balau core C++ library
//
// Copyright (C) 2008 Bora Software (contact@borasoftware.com)
//
// Licensed under the Boost Software License - Version 1.0 - August 17th, 2003.
// See the LICENSE file for the full license text.
//


#ifndef COM_BORA_SOFTWARE__BALAU_RESOURCE__HTTP
#define COM_BORA_SOFTWARE__BALAU_RESOURCE__HTTP

#include <Balau/Exception/BalauException.hpp>
#include <Balau/Resource/HttpByteReadResource.hpp>
#include <Balau/Resource/HttpUtf8To32ReadResource.hpp>
#include <Balau/Resource/Url.hpp>
#include <Balau/Resource/UriComponents.hpp>

namespace Balau::Resource {

class Http : public Url {
    public: Http() = default;

    public: explicit Http(std::string && uri_) : Url(std::move(uri_)) {}

    public: explicit Http(std::string_view uri_) : Url(uri_) {}

    public: explicit Http(const char * uri_) : Url(uri_) {}

    public: Http(const Http & copy) = default;

    public: Http(Http && rhs) noexcept : Url(std::move(rhs)) {}

    public: std::unique_ptr<Uri> clone() const override {
        return std::unique_ptr<Uri>(new Http(*this));
    }

    public: std::unique_ptr<Uri> append(const std::string & pathComponent) const override {
        return std::unique_ptr<Uri>(new Http(appendPathComponent(pathComponent)));
    }

    public: std::unique_ptr<Uri> resolve(std::string_view path) const override {
        static const std::regex scheme { "[a-zA-Z][a-zA-Z0-9+-\\.]*:" };

        auto cleanPath = Util::Strings::trim(path);
        auto str = std::string(cleanPath);

        if (Util::Strings::startsWithRegex(str, scheme)) {
            std::unique_ptr<Uri> uri;
            fromString(uri, str);
            return uri;
        }

        const UriComponents components(uri);

        if (Util::Strings::startsWith(str, "/")) {
            // Absolute path.
            std::string url = ::toString(components.scheme(), "://", components.host(), str);
            return std::unique_ptr<Uri>(new Http(url));
        } else {
            // Relative path.
            // TODO normalise path.
            std::string url = ::toString(components.scheme(), "://", components.host(), "/", components.path(), "/", str);
            return std::unique_ptr<Uri>(new Http(url));
        }
    }

    public: bool operator == (const Uri & rhs) const override {
        const auto * o = dynamic_cast<const Http *>(&rhs);
        return o != nullptr && uri == o->uri;
    }

    public: bool canReadFrom() const override {
        return true;
    }

    public: bool canWriteTo() const override {
        return false;
    }

    public: template <typename AllocatorT> Balau::U8String<AllocatorT> toRawString() const {
        return ::toString<AllocatorT>(uri);
    }

    public: HttpByteReadResource getByteReadResource() const {
        return HttpByteReadResource(*this);
    }

    public: HttpUtf8To32ReadResource getUtf8To32ReadResource() const {
        return HttpUtf8To32ReadResource(*this);
    }

    public: std::unique_ptr<ByteReadResource> byteReadResource() const override {
        return std::unique_ptr<ByteReadResource>(new HttpByteReadResource(*this));
    }

    public: std::unique_ptr<Utf8To32ReadResource> utf8To32ReadResource() const override {
        return std::unique_ptr<Utf8To32ReadResource>(new HttpUtf8To32ReadResource(*this));
    }

    public: std::unique_ptr<ByteWriteResource> byteWriteResource() override {
        ThrowBalauException(Exception::NotImplementedException, "HTTP URIs do not have a byte write resource.");
    }

    public: std::unique_ptr<Utf32To8WriteResource> utf32To8WriteResource() override {
        ThrowBalauException(Exception::NotImplementedException, "HTTP URIs do not have a Unicode write resource.");
    }

    public: bool isRecursivelyIterable() const override {
        return false;
    }

    public: bool isIterable() const override {
        return false;
    }

    public: std::unique_ptr<RecursiveUriIterator> recursiveIterator() const override {
        ThrowBalauException(Exception::NotImplementedException, "HTTP URIs do not have recursive iterators.");
    }

    public: std::unique_ptr<UriIterator> iterator() const override {
        ThrowBalauException(Exception::NotImplementedException, "HTTP URIs do not have iterators.");
    }

    public: void dispatch(UriDispatcher & dispatcher) const override {
        dispatcher.dispatch(*this);
    }
};

template <typename AllocatorT>
inline Balau::U8String<AllocatorT> toString(const Http & http) {
    return http.toRawString<AllocatorT>();
}

} // namespace Balau::Resource

#endif // COM_BORA_SOFTWARE__BALAU_RESOURCE__HTTP