99 lines
3.1 KiB
Crystal
99 lines
3.1 KiB
Crystal
# Mentorenwahl: A fullstack application for assigning mentors to students based on their whishes.
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# Copyright (C) 2022 Dominic Grimm
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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require "router"
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require "http/server"
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require "json"
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module Backend
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module Api
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# Api webserver
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class WebServer
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include Router
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# GraphQL playground HTML code
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#
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# NOTE: Is minified in production
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GRAPHQL_PLAYGROUND = {% if flag?(:development) %}
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{{ read_file("#{__DIR__}/playground.html") }}
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{% else %}
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{{ run("./macros/minify_html.cr", read_file("#{__DIR__}/playground.html")).stringify }}
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{% end %}
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# GraphQL request data serializer
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struct GraphQLQueryData
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include JSON::Serializable
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property query : String
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property variables : Hash(String, JSON::Any)?
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property operation_name : String?
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end
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# "Draws" (creates) routes
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def draw_routes : Nil
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# enable graphql playground when in development mode or explicitly enabled
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if Backend.config.api.graphql_playground_fully_enabled?
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Log.info { "GraphQL playground enabled" }
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get "/" do |context|
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context.response.content_type = "text/html"
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context.response.puts(GRAPHQL_PLAYGROUND)
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context
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end
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end
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post "/" do |context|
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context.response.content_type = "application/json"
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data = GraphQLQueryData.from_json(context.request.body.not_nil!.gets_to_end.not_nil!)
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development = {% if flag?(:development) %}
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context.request.query_params["development"]? == "true"
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{% else %}
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false
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{% end %}
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{% if flag?(:development) %}
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Log.notice { "Development request incoming" } if development
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{% end %}
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context.response.print(
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Schema::SCHEMA.execute(
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data.query,
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data.variables,
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data.operation_name,
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Context.new(context.request, development)
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)
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)
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context
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end
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end
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# Runs the webserver with according middleware
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def run : Nil
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server = HTTP::Server.new([
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HTTP::LogHandler.new,
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HTTP::ErrorHandler.new,
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HTTP::CompressHandler.new,
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route_handler,
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])
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server.bind_tcp("0.0.0.0", 80, true)
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server.listen
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end
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end
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end
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end
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