mirror of
https://github.com/matrix-construct/construct
synced 2024-08-19 16:14:43 +02:00
276 lines
5.7 KiB
C++
276 lines
5.7 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#include "media.h"
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namespace ircd::m::media::thumbnail
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{
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extern conf::item<bool> enable;
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extern conf::item<size_t> width_min;
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extern conf::item<size_t> width_max;
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extern conf::item<size_t> height_min;
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extern conf::item<size_t> height_max;
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}
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using namespace ircd::m::media::thumbnail; //TODO: XXX
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decltype(ircd::m::media::thumbnail::enable)
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ircd::m::media::thumbnail::enable
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{
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{ "name", "ircd.m.media.thumbnail.enable" },
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{ "default", true },
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};
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decltype(ircd::m::media::thumbnail::width_min)
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ircd::m::media::thumbnail::width_min
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{
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{ "name", "ircd.m.media.thumbnail.width.min" },
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{ "default", 16L },
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};
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decltype(ircd::m::media::thumbnail::width_max)
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ircd::m::media::thumbnail::width_max
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{
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{ "name", "ircd.m.media.thumbnail.width.max" },
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{ "default", 1536L },
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};
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decltype(ircd::m::media::thumbnail::height_min)
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ircd::m::media::thumbnail::height_min
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{
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{ "name", "ircd.m.media.thumbnail.height.min" },
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{ "default", 16L },
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};
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decltype(ircd::m::media::thumbnail::height_max)
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ircd::m::media::thumbnail::height_max
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{
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{ "name", "ircd.m.media.thumbnail.height.max" },
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{ "default", 1536L },
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};
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resource
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thumbnail_resource__legacy
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{
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"/_matrix/media/v1/thumbnail/",
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{
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"(11.7.1.4) thumbnails (legacy version)",
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resource::DIRECTORY,
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}
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};
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resource
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thumbnail_resource
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{
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"/_matrix/media/r0/thumbnail/",
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{
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"(11.7.1.4) thumbnails",
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resource::DIRECTORY,
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}
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};
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static resource::response
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get__thumbnail_local(client &client,
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const resource::request &request,
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const string_view &server,
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const string_view &file,
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const m::room &room);
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resource::response
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get__thumbnail(client &client,
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const resource::request &request)
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{
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if(request.parv.size() < 1)
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throw http::error
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{
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http::MULTIPLE_CHOICES, "Server name parameter required"
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};
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if(request.parv.size() < 2)
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throw http::error
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{
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http::MULTIPLE_CHOICES, "Media ID parameter required"
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};
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auto &server
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{
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request.parv[0]
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};
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const auto &file
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{
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request.parv[1]
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};
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// Thumbnail doesn't require auth so if there is no user_id detected
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// then we download on behalf of @ircd.
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const m::user::id &user_id
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{
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request.user_id?
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m::user::id{request.user_id}:
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m::me.user_id
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};
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const m::room::id::buf room_id
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{
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download(server, file, user_id)
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};
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return get__thumbnail_local(client, request, server, file, room_id);
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}
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static resource::method
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method_get__legacy
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{
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thumbnail_resource__legacy, "GET", get__thumbnail
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};
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static resource::method
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method_get
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{
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thumbnail_resource, "GET", get__thumbnail
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};
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static resource::response
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get__thumbnail_local(client &client,
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const resource::request &request,
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const string_view &hostname,
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const string_view &mediaid,
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const m::room &room)
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{
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const auto &method
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{
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request.query.get("method", "scale"_sv)
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};
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std::pair<size_t, size_t> dimension
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{
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request.query.get<size_t>("width", 0),
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request.query.get<size_t>("height", 0)
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};
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if(dimension.first)
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{
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dimension.first = std::max(dimension.first, size_t(width_min));
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dimension.first = std::min(dimension.first, size_t(width_max));
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}
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if(dimension.second)
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{
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dimension.second = std::max(dimension.second, size_t(height_min));
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dimension.second = std::min(dimension.second, size_t(height_max));
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}
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static const m::event::fetch::opts fopts
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{
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m::event::keys::include {"content"}
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};
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const m::room::state state
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{
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room, &fopts
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};
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// Get the file's total size
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size_t file_size{0};
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state.get("ircd.file.stat", "size", [&file_size]
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(const m::event &event)
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{
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file_size = at<"content"_>(event).get<size_t>("value");
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});
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// Get the MIME type
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char type_buf[64];
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string_view content_type
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{
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"application/octet-stream"
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};
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state.get("ircd.file.stat", "type", [&type_buf, &content_type]
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(const m::event &event)
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{
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const auto &value
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{
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unquote(at<"content"_>(event).at("value"))
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};
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content_type =
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{
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type_buf, copy(type_buf, value)
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};
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});
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const unique_buffer<mutable_buffer> buf
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{
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file_size
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};
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size_t copied(0);
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const auto sink{[&buf, &copied]
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(const const_buffer &block)
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{
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copied += copy(buf + copied, block);
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}};
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const size_t read_size
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{
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read_each_block(room, sink)
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};
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if(unlikely(read_size != file_size || file_size != copied))
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throw ircd::error
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{
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"File %s/%s [%s] size mismatch: expected %zu got %zu copied %zu",
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hostname,
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mediaid,
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string_view{room.room_id},
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file_size,
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read_size,
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copied
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};
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const bool fallback // Reasons to just send the original image
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{
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!enable ||
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!dimension.first ||
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!dimension.second ||
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(method != "scale" && method != "crop")
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//TODO: condition if magick is actually loaded
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};
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if(fallback)
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return resource::response
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{
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client, buf, content_type
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};
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const auto closure{[&client, &content_type]
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(const const_buffer &buf)
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{
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resource::response
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{
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client, buf, content_type
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};
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}};
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if(method == "crop")
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magick::thumbcrop
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{
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buf, dimension, closure
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};
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else
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magick::thumbnail
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{
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buf, dimension, closure
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};
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return {}; // responded from closure.
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}
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