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 



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
 
# File 'app/server.rb', line 14

def self.init_and_run(config, resources_dir)
  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

  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'
      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'
      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),
          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
            [
              filename,
              {
                filename: filename,
                description: description,
                contents: contents.strip
              }
            ]
          end
        }
      end
      status 200
      headers 'Content-Type' => 'application/json'
      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]

      full_sql = params[:sql]
      sql = params[:sql]
      variables = params[:variables] || {}
      if params[:selection]
        selection = params[:selection]
        if selection.include?('-')
          # sort because the selection could be in either direction
          selection = params[:selection].split('-').map { |v| Integer(v) }.sort
        else
          selection = Integer(selection)
          selection = [selection, selection]
        end

        sql = if selection[0] == selection[1]
                SqlParser.find_statement_at_cursor(params[:sql], selection[0])
              else
                full_sql[selection[0], selection[1]]
              end

        break client_error("can't find query at selection") unless sql
      end

      result = database.with_client do |client|
        variables.each do |name, value|
          client.query("SET @#{name} = #{value};")
        end
        execute_query(client, sql)
      end

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

      status 200
      headers 'Content-Type' => 'application/json'
      body result.to_json
    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'
      body @html
    end
  end

  error do |e|
    status 500
    headers 'Content-Type' => 'application/json'
    message = e.message.lines.first&.strip || 'unexpected error'
    message = "#{message[0..80]}…" if message.length > 80
    result = {
      error: message,
      stacktrace: e.backtrace.map { |b| b }.join("\n")
    }
    body result.to_json
  end

  run!
end