Class: Server

Inherits:
Sinatra::Base
  • Object
show all
Defined in:
app/server.rb

Overview

SQLUI Sinatra server.

Class Method Summary collapse

Class Method Details

.init_and_run(config, resources_dir) ⇒ Object 



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# File 'app/server.rb', line 17

def self.init_and_run(config, resources_dir)
  Mysql2::Client.default_query_options[:as] = :array
  Mysql2::Client.default_query_options[:cast_booleans] = true
  Mysql2::Client.default_query_options[:database_timezone] = :utc
  Mysql2::Client.default_query_options[:cache_rows] = false

  set :logging,         true
  set :bind,            '0.0.0.0'
  set :port,            config.port
  set :environment,     config.environment
  set :raise_errors,    false
  set :show_exceptions, false

  logger = WEBrick::Log.new

  get '/-/health' do
    status 200
    body 'OK'
  end

  get '/?' do
    redirect config.list_url_path, 301
  end

  get "#{config.list_url_path}/?" do
    erb :databases, locals: { config: config }
  end

  config.database_configs.each do |database|
    get "#{database.url_path}/?" do
      redirect "#{database.url_path}/query", 301
    end

    get "#{database.url_path}/sqlui.css" do
      @css ||= File.read(File.join(resources_dir, 'sqlui.css'))
      status 200
      headers 'Content-Type' => 'text/css; charset=utf-8'
      body @css
    end

    get "#{database.url_path}/sqlui.js" do
      @js ||= File.read(File.join(resources_dir, 'sqlui.js'))
      status 200
      headers 'Content-Type' => 'text/javascript; charset=utf-8'
      body @js
    end

    post "#{database.url_path}/metadata" do
      metadata = database.with_client do |client|
        {
          server: "#{config.name} - #{database.display_name}",
          list_url_path: config.list_url_path,
          schemas: DatabaseMetadata.lookup(client, database),
          table_aliases: database.table_aliases,
          joins: database.joins,
          saved: Dir.glob("#{database.saved_path}/*.sql").to_h do |path|
            contents = File.read(path)
            comment_lines = contents.split("\n").take_while do |l|
              l.start_with?('--')
            end
            filename = File.basename(path)
            description = comment_lines.map { |l| l.sub(/^-- */, '') }.join("\n")
            [
              filename,
              {
                filename: filename,
                description: description,
                contents: contents.strip
              }
            ]
          end
        }
      end
      status 200
      headers 'Content-Type' => 'application/json; charset=utf-8'
      body metadata.to_json
    end

    post "#{database.url_path}/query" do
      params.merge!(JSON.parse(request.body.read, symbolize_names: true))
      break client_error('missing sql') unless params[:sql]

      variables = params[:variables] || {}
      sql = find_selected_query(params[:sql], params[:selection])

      result = database.with_client do |client|
        query_result = execute_query(client, variables, sql)
        # NOTE: the call to result.field_types must go before other interaction with the result. Otherwise you will
        # get a seg fault. Seems to be a bug in Mysql2.
        # TODO: stream this and render results on the client as they are returned?
        {
          columns: query_result.fields,
          column_types: MysqlTypes.map_to_google_charts_types(query_result.field_types),
          total_rows: query_result.size,
          rows: (query_result.to_a || []).take(Sqlui::MAX_ROWS)
        }
      end

      result[:selection] = params[:selection]
      result[:query] = params[:sql]

      status 200
      headers 'Content-Type' => 'application/json; charset=utf-8'
      body result.to_json
    end

    get "#{database.url_path}/download_csv" do
      break client_error('missing sql') unless params[:sql]

      sql = Base64.decode64(params[:sql]).force_encoding('UTF-8')
      logger.info "sql: #{sql}"
      variables = params.map { |k, v| k[0] == '_' ? [k, v] : nil }.compact.to_h
      sql = find_selected_query(sql, params[:selection])
      logger.info "sql: #{sql}"

      content_type 'application/csv; charset=utf-8'
      attachment 'result.csv'
      status 200

      database.with_client do |client|
        query_result = execute_query(client, variables, sql)
        stream do |out|
          out << CSV::Row.new(query_result.fields, query_result.fields, header_row: true).to_s.strip
          query_result.each do |row|
            out << "\n#{CSV::Row.new(query_result.fields, row).to_s.strip}"
          end
        end
      end
    end

    get(%r{#{Regexp.escape(database.url_path)}/(query|graph|structure|saved)}) do
      @html ||= File.read(File.join(resources_dir, 'sqlui.html'))
      status 200
      headers 'Content-Type' => 'text/html; charset=utf-8'
      body @html
    end
  end

  error do |e|
    status 500
    headers 'Content-Type' => 'application/json; charset=utf-8'
    message = e.message.lines.first&.strip || 'unexpected error'
    result = {
      error: message,
      stacktrace: e.backtrace.map { |b| b }.join("\n")
    }
    body result.to_json
  end

  run!
end