2019 - COSCUP - 復活一個 Browser Game - Unlight 開源事件

Transcript

1. Revive a Browser Game Server The Open Unlight Project Photo

   by Artem Labunsky on Unsplash

2. WEB DEVELOPER GAME DEVELOPER ૵ ࣌ ݭ໵ @elct9620

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5. Ruby + ActionScript 3

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7. Adobe Flash IDE is unavailable!

8. mxmlc src/Unlight.mxml

9. Unlight can be compiled by Flex SDK 3.x

10. Failed because missing files

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12. Setup environment takes much time

13. The source code always become dirty

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15. •Always reset client compile environment •Patches / Rework •Customizable Server/Client

    •Adjustable Docker compose configure
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17. Secure Remote Password not matched!

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19. http://srp.stanford.edu/design.html

20. http://srp.stanford.edu/design.html Step 1. Client create PublicKey A

21. http://srp.stanford.edu/design.html Step 2. Server create PublicKey B and send it

    with Salt to user

22. http://srp.stanford.edu/design.html Step 3~. Compute SessionKey and verify other's Matcher

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33. (／‵Д′)／~ ╧╧

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36. 24 Core CPU 24G RAM 98K IOPS SSD 300M/100M FTTH

    Sponsor by Poka

37. Feel "LAG" after 500 online players

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40. (0.214518s) SELECT * FROM `card_inventories` WHERE ( `card_inventories`. `chara_card_deck_id` =

    2971)

41. src/model/card_inventory.rb

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43. ALTER TABLE card_inventories ADD INDEX chara_card_deck_id (chara_card_deck_id)

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45. About 100x faster

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47. About 1000 online players without "LAG"

48. •Adjust Cpuset to fix database on specify cores •Adjust Swappiness

    to prevent use disk •Adjust Full Table Index to cache small table

49. •Move Database outside Docker •Enable SR-IOV to use physics network

    card •Add partition to database

50. Estimate capability > 3000 online players

51. •DAU about 500 online players •Rows grow fast
 Only two

    weeks we have 10M ~ 20M rows •1 Developer
 1 DevOps
 1 Player Support

52. But how to hosting this game?

53. Add CloudWatch to analytic online players

54. Open Unlight's Reword/Customize

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57. Open Unlight's Allow add customize gems

58. Tricks to allow Docker add optional files

59. customize/server/src/authentication.rb

60. customize/server/src/payment.ru

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62. Use Rack to implement API server

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64. Extend CLI to serve in docker

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67. Hosting a game have to support players resolve problems

68. SmartLook can replay player session to debug

69. ZenDesk can help players in one central system

70. •ZenDesk - Player support •SmartLook - Client Debug (for HTML5)

    •Asana - Issue Tracking •AWS - CDN/Monitoring •Discord - Co-working

71. The HTML5 version?

72. Flash will be removed at 2020 in Chrome

73. The Unlight client is Flash

74. But no one knows CPA will maintenance or not

75. From TCPSocket to WebSocket

76. Client Server Packet The TCPSocket send packet directly

77. Client Server Packet The WebSocket send packet with WebSocket wrapper

    WebSocket

78. Unlight use EventMachine handles connection

79. Comment out all EventMachine connection

80. Implement a Rack middleware with WebSocket gem

81. Add Rack's .ru and it can be served by Puma

    or Unicorn

82. We already migrated 90% server to WebSocket

83. How the client communicates with the server?

84. It convert data to a command

85. Each packet should have a header to describe command

86. JavaScript can create 2 byte struct?

87. new Int8Array([0x00, 0x03, 0x00, 0x01, 0x00, 0x0a])

88. (／‵Д′)／~ ╧╧

89. You can learn how the C programmer think by Unlight's

    Ruby source code

90. From Golang to WebAssembly

91. func AuthCmd(name string) []byte { buffer := new(bytes.Buffer) binary.Write(buffer, binary.BigEndian,

    uint16(1)) binary.Write(buffer, binary.BigEndian, []byte(name)) return buffer.Bytes() }

92. GOOS=js GOARCH=wasm go build -o libul.go

93. Convert Unlight to HTML5 is possible!

94. What the next?

95. Test! Test! Test!

96. We are trying to learn to host a game server

    as a programmer

97. And last ...

98. New security problem is coming!

99. Thanks