Death, Taxes, and HTTP (Chicago Roboto 2017 Keynote)

Transcript

1. Death, Taxes, and HTTP @JesseWilson @JakeWharton

2. You

3. Your Team

4. Client

5. Client

6. Client Server

7. Client Server

8. Client Server

9. Client Server

10. Client Server

11. Round-Trip Time Client Server

12. RTT Client Server

13. Client Server

14. Client Server GET / HTTP/1.1

15. Client Server GET / HTTP/1.1 HTTP/1.1 200 OK

16. Client Server GET / HTTP/1.1 HTTP/1.1 200 OK

17. Client Server GET / HTTP/1.1 HTTP/1.1 200 OK Transport Layer

    Security

18. Client Server GET / HTTP/1.1 HTTP/1.1 200 OK TLS

19. Client Server GET / HTTP/1.1 HTTP/1.1 200 OK TLS

20. Client Server TLS v1.2

21. Client Server TLS v1.2 U TLS?

22. Client Server TLS v1.2 Ya. Here's my cert.

23. Client Server TLS v1.2 Great. Key is hunter2

24. Client Server TLS v1.2 I'm ready!

25. Client Server TLS v1.2 GET / HTTP/1.1

26. Client Server TLS v1.2 GET / HTTP/1.1 HTTP/1.1 200 OK

27. Client Server TLS v1.2 w/ session resumption GET / HTTP/1.1

    HTTP/1.1 200 OK

28. GET / HTTP/1.1 HTTP/1.1 200 OK Client Server TLS v1.2

    w/ session resumption

29. Client Server TLS v1.2 w/ session resumption 3 GET /

    HTTP/1.1 HTTP/1.1 200 OK

30. Client Server TLS v1.3

31. Client Server TLS v1.3 TLS? Key is hunter2

32. Client Server TLS v1.3 Ya. Here's my cert and key

33. Client Server TLS v1.3 Let's go!

34. Client Server TLS v1.3 GET / HTTP/1.1

35. Client Server TLS v1.3 GET / HTTP/1.1 HTTP/1.1 200 OK

36. Client Server TLS v1.3 w/ session resumption GET / HTTP/1.1

    HTTP/1.1 200 OK

37. Client Server TLS v1.3 w/ 0-RTT session resumption

38. Client Server TLS v1.3 w/ 0-RTT session resumption

39. Client Server TLS v1.3 w/ 0-RTT session resumption GET /

    HTTP/1.1

40. Client Server TLS v1.3 w/ 0-RTT session resumption GET /

    HTTP/1.1

41. Client Server TLS v1.3 w/ 0-RTT session resumption GET /

    HTTP/1.1 HTTP/1.1 200 OK

42. Client Server TLS v1.3 w/ 0-RTT session resumption GET /

    HTTP/1.1 HTTP/1.1 200 OK

43. Client Server TLS v1.3 w/ 0-RTT session resumption GET /

    HTTP/1.1 HTTP/1.1 200 OK

44. RTT TLS v1.3 w/ 0-RTT session resumption TLS v1.3 w/

    session resumption TLS v1.3 TLS v1.2 w/ session resumption TLS v1.2 2 1 1 1 0

45. OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder()

    .url("https://twitter.com") .build(); Call call = client.newCall(request); Response response = call.execute(); System.out.println(response.handshake().tlsVersion());

46. OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder()

    .url("https://twitter.com") .build(); Call call = client.newCall(request); Response response = call.execute(); System.out.println(response.handshake().tlsVersion());

47. OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder()

    .url("https://twitter.com") .build(); Call call = client.newCall(request); Response response = call.execute(); System.out.println(response.handshake().tlsVersion()); TLS_1_2

48. HTTP Client Server GET / HTTP/1.1 HTTP/1.1 200 OK

49. HTTP Client Server GET / HTTP/1.1 HTTP/1.1 200 OK

50. HTTP Client Server GET / HTTP/1.1 HTTP/1.1 200 OK

51. HTTP Client Server GET / HTTP/1.1 HTTP/1.1 200 OK

52. HTTP Server Client GET /YHTTP/1.1 HTTP/1.1 200 OK

53. GET /YHTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization: Basic

    QWxhZGRpbjpPcGVuU2VzYW1l HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"} HTTP

54. /Y /payments.html /profile.html /login.html /settings.html /static/fonts/roboto.ttf /static/js/app.js /static/css/main.css /static/image/logo.png

55. /Y /payments.html /profile.html /login.html /settings.html /static/fonts/roboto.ttf /static/js/app.js /static/css/main.css /static/image/logo.png /api/auth

    /api/user /api/payments /api/payments/1234 /api/settings

56. Server Client GET /api/payments HTTP/1.1 200 OK

57. Server Client GET /api/payments HTTP/1.1 200 OK

58. Server Client GET /api/payments HTTP/1.1 200 OK

59. Server Client GET /api/payments HTTP/1.1 200 OK

60. Server Client GET /api/payments HTTP/1.1 200 OK

61. Server Client GET /api/payments HTTP/1.1 200 OK

62. Server Client GET /api/payments HTTP/1.1 200 OK

63. .html

64. .js .html .js .js .js .js .js .js

65. .js .html .js .js .js .js .js .js .css .css

    .css .css

66. .js .html .js .js .js .js .js .js .png .png

    .png .png .png .png .png .png .css .css .css .css

67. .js .html .js .js .js .js .js .js .png .jpg

    .png .png .jpg .png .png .png .png .png .css .css .css .css

68. .js .html .js .js .js .js .js .js .png .jpg

    .png .png .jpg .png .png .png .png .png .css .css .css .css 22 requests

69. .js .html .js .js .js .js .js .js .png .jpg

    .png .png .jpg .png .png .png .png .png .css .css .css .css 16 requests

70. .js .html .png .jpg .png .png .jpg .png .png .png

    .png .png .css .css .css .css 13 requests

71. .js .html .png .jpg .png .png .jpg .png .css 6

    requests .png .png .png .png
72. None

73. .js .html .png .jpg .png .png .jpg .png .css 6

    requests .png .png .png .png

74. .js .html .jpg .jpg .png .css 1+3+2 requests example.com cdn.example.com

    images.example.com

75. .js .html .jpg .jpg .png .css example.com cdn.example.com images.example.com

76. .js .html .jpg .jpg .png .css example.com cdn.example.com images.example.com

77. .js .html .jpg .jpg .png .css example.com cdn.example.com images.example.com .jpg

    .jpg .jpg .jpg .jpg .jpg

78. .js .html .png .css example.com cdn.example.com images.example.com .jpg .jpg .jpg

    .jpg .jpg .jpg .jpg .jpg

79. .js .html .png .css example.com cdn.example.com images1.example.com .jpg .jpg .jpg

    .jpg .jpg .jpg .jpg .jpg images2.example.com

80. .js .html .png .css example.com cdn.example.com images1.example.com .jpg .jpg .jpg

    .jpg .jpg .jpg .jpg .jpg images2.example.com

81. Server Client GET /api/payments HTTP/1.1 200 OK

82. /api/payments [A 1234, 1275, 1690, 2641, 2903, 4991, 5312, 5319,

    14328, 28321, 29948, 30991, 37174, 73572 ]B

83. /api/payments [A 1234, 1275, 1690, 2641, 2903, 4991, 5312, 5319,

    14328, 28321, 29948, 30991, 37174, 73572 ]B /api/payments/{id} {C id: 1234, amount: 4200, currency: "USD", initiator_id:F48818374, recipient_id:G24567654, initiated_at: 14764993868, completed_at: 14769455213 },Z

84. /api/payments [A {C id: 1234, amount: 4200, currency: "USD", initiator:F{

    id: 48818374, name: "Jake Wharton" }, recipient:G{ id: 24567654, name: "Jesse Wilson" }, initiated_at: 14764993868, completed_at: 14769455213 },Z ... /api/payments/{id} 1234 1275 1690, 2641, 2903, 4991, 5312, 5319, 14328,

85. HTTP/2 Client Server GET /api/payments HTTP/1.1 200 OK

86. HTTP/2 Client Server GET /api/payments HTTP/1.1 200 OK

87. HTTP/2 Client Server GET /api/payments HTTP/1.1 200 OK

88. HTTP/2 Client Server GET /api/payments HTTP/1.1 200 OK

89. HTTP/2 Client Server GET /api/payments HTTP/1.1 200 OK

90. HTTP/2 Client Server GET /api/payments HTTP/1.1 200 OK

91. HTTP/2 Client Server GET /api/payments HTTP/1.1 200 OK

92. HTTP/2 Client Server GET /api/payments HTTP/1.1 200 OK

93. HTTP/2 Client Server GET /api/payments HTTP/1.1 200 OK

94. HTTP/2 Client Server GET /api/payments HTTP/1.1 200 OK

95. HTTP/2 Client Server GET /api/payments HTTP/1.1 200 OK

96. HTTP/2 Client Server GET /api/payments?last=43163 HTTP/1.1 200 OK

97. HTTP/2 Client Server GET /api/payments?last=43163 HTTP/1.1 200 OK

98. HTTP/2 Client Server GET /api/payments?last=43163 HTTP/1.1 200 OK

99. HTTP/2 Client Server GET /api/payments?last=43163 HTTP/1.1 200 OK

100. HTTP/2 Client Server GET /api/payments?last=43163 HTTP/1.1 200 OK

101. HTTP/1.1 GET /api/payments?last=43163 HTTP/1.1 200 OK GET /api/payments HTTP/1.1 200

     OK HTTP/2

102. HTTP/1.1 GET /api/payments?last=43163 HTTP/1.1 200 OK GET /api/payments HTTP/1.1 200

     OK HTTP/2 time

103. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"} HTTP/1.1 HTTP/2 GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"}

104. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"} HTTP/1.1 HTTP/2 GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"}

105. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"}

106. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"}

107. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"} ID: 2 ID: 2

108. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"} ID: 2 ID: 2 GET /api/payments HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

109. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"} ID: 2 ID: 2 GET /api/payments HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

110. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"} ID: 2 ID: 2 GET /api/payments HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

111. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT {"id":1234,"amount":4200,"currency":"USD"} ID: 2 ID: 2

112. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 {"id":1234,"amount":4200,"currency":"USD"} ID: 2

113. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 {"id":1234,"amount":420 ID: 2 0,"currency":"USD"} ID: 2

114. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 {"id":1234,"amount":420 ID: 2 [1234,1275,1690,2641,2903,49 ID: 4

115. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 {"id":1234,"amount":420 ID: 2 0,"currency":"USD"} ID: 2

116. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 GET /api/payments HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

117. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 GET /api/payments HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

118. GET / HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 GET /api/payments HTTP/1.1 Host: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

119. GET / HTTP/1.1 0x25: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 GET /api/payments HTTP/1.1 0x25: square.com:443 User-Agent: okhttp/3.7.0 Accept: application/json Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

120. GET / HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 Accept: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 GET /api/payments HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 Accept: application/json Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

121. GET / HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 0x12: application/json Authorization:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK Content-Type: application/json Content-Length: 42 E-Tag: "686897696a7c876b7e" Last-Modified: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 GET /api/payments HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 0x12: application/json Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

122. GET / HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 0x12: application/json 0x16:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK 0x1E: application/json 0x1B: 42 0x21: "686897696a7c876b7e" 0x2B: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 GET /api/payments HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 0x12: application/json 0x16: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

123. GET / HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 0x12: application/json 0x16:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK 0x1E: application/json 0x1B: 42 0x21: "686897696a7c876b7e" 0x2B: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 GET /api/payments HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 0x12: application/json 0x16: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

124. GET / HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 0x12: application/json 0x16:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK 0x1E: application/json 0x1B: 42 0x21: "686897696a7c876b7e" 0x2B: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 GET /api/payments HTTP/1.1 0x25: 0x01 0x39: okhttp/3.7.0 0x12: application/json 0x16: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

125. GET / HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 0x12: application/json 0x16:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK 0x1E: application/json 0x1B: 42 0x21: "686897696a7c876b7e" 0x2B: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 GET /api/payments HTTP/1.1 0x25: 0x01 0x39: 0x02 0x12: application/json 0x16: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

126. GET / HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 0x12: application/json 0x16:

     Basic QWxhZGRpbjpPcGVuU2VzYW1l Client Server HTTP/1.1 200 OK 0x1E: application/json 0x1B: 42 0x21: "686897696a7c876b7e" 0x2B: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 ID: 2 GET /api/payments HTTP/1.1 0x25: 0x01 0x39: 0x02 0x12: 0x03 0x16: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 4

127. Client Server GET / HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 0x12:

     application/json 0x16: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 2 HTTP/1.1 200 OK 0x1E: application/json 0x1B: 42 0x21: "686897696a7c876b7e" 0x2B: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 GET /api/payments HTTP/1.1 0x25: 0x01 0x39: 0x02 0x12: 0x03 0x16: 0x04 ID: 4

128. Client Server GET / HTTP/1.1 0x25: square.com:443 0x39: okhttp/3.7.0 0x12:

     application/json 0x16: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 2 HTTP/1.1 200 OK 0x1E: application/json 0x1B: 42 0x21: "686897696a7c876b7e" 0x2B: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 GET /api/payments HTTP/1.1 0x25: 0x01 0x39: 0x02 0x12: 0x03 0x16: 0x04 ID: 4

129. Client Server HTTP/1.1 200 OK 0x1E: application/json 0x1B: 42 0x21:

     "686897696a7c876b7e" 0x2B: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 {"id":1234,"amount":420 ID: 2 0,"currency":"USD"} ID: 2 GET /api/payments HTTP/1.1 0x25: 0x01 0x39: 0x02 0x12: 0x03 0x16: 0x04 HTTP/1.1 200 OK 0x1E: application/json 0x1B: 471 0x21: "ae7284b30ccc93" 0x2B: Wed, 19 Apr 2017 09:22:09 GMT ID: 4

130. Client Server HTTP/1.1 200 OK 0x1E: application/json 0x1B: 42 0x21:

     "686897696a7c876b7e" 0x2B: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 {"id":1234,"amount":420 ID: 2 0,"currency":"USD"} ID: 2 GET /api/payments HTTP/1.1 0x25: 0x01 0x39: 0x02 0x12: 0x03 0x16: 0x04 HTTP/1.1 200 OK 0x1E: application/json 0x1B: 471 0x21: "ae7284b30ccc93" 0x2B: Wed, 19 Apr 2017 09:22:09 GMT ID: 4

131. Client Server 0x08 0x1E: application/json 0x1B: 42 0x21: "686897696a7c876b7e" 0x2B:

     Thu, 20 Apr 2017 12:45:26 GMT ID: 2 {"id":1234,"amount":420 ID: 2 0,"currency":"USD"} ID: 2 GET /api/payments HTTP/1.1 0x25: 0x01 0x39: 0x02 0x12: 0x03 0x16: 0x04 0x08 0x1E: application/json 0x1B: 471 0x21: "ae7284b30ccc93" 0x2B: Wed, 19 Apr 2017 09:22:09 GMT ID: 4

132. Client Server 0x08 0x1E: application/json 0x1B: 42 0x21: "686897696a7c876b7e" 0x2B:

     Thu, 20 Apr 2017 12:45:26 GMT ID: 2 {"id":1234,"amount":420 ID: 2 0,"currency":"USD"} ID: 2 GET /api/payments HTTP/1.1 0x25: 0x01 0x39: 0x02 0x12: 0x03 0x16: 0x04 0x08 0x1E: 0x1A 0x1B: 471 0x21: "ae7284b30ccc93" 0x2B: Wed, 19 Apr 2017 09:22:09 GMT ID: 4

133. Client Server 0x08 0x1E: application/json 0x1B: 42 0x21: "686897696a7c876b7e" 0x2B:

     Thu, 20 Apr 2017 12:45:26 GMT ID: 2 {"id":1234,"amount":420 ID: 2 0,"currency":"USD"} ID: 2 GET /api/payments HTTP/1.1 0x25: 0x01 0x39: 0x02 0x12: 0x03 0x16: 0x04 0x08 0x1E: 0x1A 0x1B: 471 0x21: "ae7284b30ccc93" 0x2B: Wed, 19 Apr 2017 09:22:09 GMT ID: 4

134. Client Server ID: 2 GET / HTTP/1.1 0x25: square.com:443 0x39:

     okhttp/3.7.0 0x12: application/json 0x16: Basic QWxhZGRpbjpPcGVuU2VzYW1l ID: 2 0x08 0x1E: application/json 0x1B: 42 0x21: "686897696a7c876b7e" 0x2B: Thu, 20 Apr 2017 12:45:26 GMT ID: 2 {"id":1234,"amount":420 ID: 2 0,"currency":"USD"} ID: 4 GET /api/payments HTTP/1.1 0x25: 0x01 0x39: 0x02 0x12: 0x03 0x16: 0x04 ID: 4 0x08 0x1E: 0x1A 0x1B: 471 0x21: "ae7284b30ccc93" 0x2B: Wed, 19 Apr 2017 09:22:09 GMT

135. OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder()

     .url("https://twitter.com") .build(); Call call = client.newCall(request); Response response = call.execute(); System.out.println(response.protocol());

136. OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder()

     .url("https://twitter.com") .build(); Call call = client.newCall(request); Response response = call.execute(); System.out.println(response.protocol());

137. OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder()

     .url("https://twitter.com") .build(); Call call = client.newCall(request); Response response = call.execute(); System.out.println(response.protocol()); h2

138. Payloads {"id":1234,"amount":4200,"currency":"USD"}

139. {"id":1234,"amount":4200,"currency":"USD"} JSON

140. {"id":1234,"amount":4200,"currency":"USD"} JSON message Payment { string id = 1; int32

     amount = 2; Currency currency = 3; } enum Currency { USD = 1; } Protocol Buffers

141. {"id":1234,"amount":4200,"currency":"USD"} JSON message Payment { string id = 1; int32

     amount = 2; Currency currency = 3; } enum Currency { USD = 1; } Protocol Buffers 1=1234 2=4200 3=1

142. {"id":1234,"amount":4200,"currency":"USD"} JSON message Payment { string id = 1; int32

     amount = 2; Currency currency = 3; } enum Currency { USD = 1; } Protocol Buffers 1=1234 2=4200 3=1 0104D20210680301

143. {"id":1234,"amount":4200,"currency":"USD"} JSON message Payment { string id = 1; int32

     amount = 2; Currency currency = 3; } enum Currency { USD = 1; } Protocol Buffers

144. Y{"id":1234,"amount":4200,"currency":"USD"}Y

145. Y{ "id":1234, "amount":4200, "currency":"USD" }Y

146. Y{"id":1234,"amount":4200,"currency":"USD"}Y

147. Y{"id":1234,"amount":4200,"currency":"USD"}Y

148. Y{"id":1234,"amount":4200,"currency":"USD"}Y

149. Y{"id":1234,"amount":4200,"currency":"USD"}Y

150. Y{"id":1234,"amount":4200,"currency":"USD"}Y id

151. Y{"id":1234,"amount":4200,"currency":"USD"}Y String(id)

152. Y{"id":1234,"amount":4200,"currency":"USD"}Y String(id) Map<String, Adapter<?>>

153. Y{"id":1234,"amount":4200,"currency":"USD"}Y String(id) Map<String, Adapter<?>> Adapter<Long>

154. Y{"id":1234,"amount":4200,"currency":"USD"}Y String(id) Map<String, Adapter<?>> Adapter<Long>

155. Y{"id":1234,"amount":4200,"currency":"USD"}Y String(id) Map<String, Adapter<?>> Adapter<Long>

156. Y{"id":1234,"amount":4200,"currency":"USD"}Y String(id) Map<String, Adapter<?>> Adapter<Long> 1234L

157. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L

158. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L

159. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L

160. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L

161. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(amount)

162. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(amount) Map<String, Adapter<?>>

163. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(amount) Map<String, Adapter<?>> Adapter<Long>

164. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(amount) Map<String, Adapter<?>> Adapter<Long>

165. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(amount) Map<String, Adapter<?>> Adapter<Long>

166. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(amount) Map<String, Adapter<?>> Adapter<Long> 4200L

167. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L 4200L

168. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L 4200L

169. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L 4200L

170. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L 4200L

171. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(currency) 4200L

172. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(currency) Map<String, Adapter<?>> 4200L

173. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(currency) Map<String, Adapter<?>> Adapter<CurrencyCode> 4200L

174. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(currency) Map<String, Adapter<?>> Adapter<CurrencyCode> 4200L

175. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(currency) Map<String, Adapter<?>> 4200L Adapter<CurrencyCode>

176. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L String(currency) Map<String, Adapter<?>> 4200L 4200L Adapter<CurrencyCode> CurrencyCode.USD

177. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L 4200L CurrencyCode.USD

178. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L 4200L CurrencyCode.USD

179. Y{"id":1234,"amount":4200,"currency":"USD"}Y 1234L 4200L CurrencyCode.USD

180. [ Y{"id":1234,"amount":4200,"currency":"USD"},Y {"id":1275,"amount":10000,"currency":"USD"}, {"id":1690,"amount":834,"currency":"USD"}, {"id":2641,"amount":2448,"currency":"USD"}, {"id":2903,"amount":11305,"currency":"USD"}, {"id":4991,"amount":566,"currency":"USD"}, {"id":5312,"amount":702,"currency":"USD"}, {"id":5319,"amount":3885,"currency":"USD"}, {"id":14328,"amount":34400,"currency":"USD"},

     {"id":28321,"amount":892,"currency":"USD"}, {"id":29948,"amount":2261,"currency":"USD"}, {"id":30991,"amount":6600,"currency":"USD"}, {"id":37174,"amount":939,"currency":"USD"}, {"id":73572,"amount":40000,"currency":"USD"} ]

181. Y{"id":1234,"amount":4200,"currency":"USD"}Y

182. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id")

183. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id")

184. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id")

185. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id")

186. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id")

187. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id")

188. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id")

189. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id")

190. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id") Adapter<Long> Adapter<CurrencyCode> Adapter<Long>

191. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id") Adapter<Long> Adapter<CurrencyCode> Adapter<Long>

192. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id") Adapter<Long> Adapter<CurrencyCode> Adapter<Long>

193. Y{"id":1234,"amount":4200,"currency":"USD"}Y ByteString("amount") ByteString("currency") ByteString("id") Adapter<Long> Adapter<CurrencyCode> Adapter<Long> Adapter<Payment>

194. [ Y{"id":1234,"amount":4200,"currency":"USD"},Y {"id":1275,"amount":10000,"currency":"USD"}, {"id":1690,"amount":834,"currency":"USD"}, {"id":2641,"amount":2448,"currency":"USD"}, {"id":2903,"amount":11305,"currency":"USD"}, {"id":4991,"amount":566,"currency":"USD"}, {"id":5312,"amount":702,"currency":"USD"}, {"id":5319,"amount":3885,"currency":"USD"}, {"id":14328,"amount":34400,"currency":"USD"},

     ByteString("amount") ByteString("currency") ByteString("id") Adapter<Long> Adapter<CurrencyCode> Adapter<Long> Adapter<Payment>

195. github.com/square/moshi

196. WebSocket Client Server

197. WebSocket Client Server GET / HTTP/1.1 Sprechen sie websocket?

198. WebSocket Client Server GET / HTTP/1.1 HTTP/1.1 101 ¡Sí!

199. WebSocket Client Server GET / HTTP/1.1 HTTP/1.1 101

200. WebSocket Client Server GET / HTTP/1.1 HTTP/1.1 101

201. WebSocket Client Server GET / HTTP/1.1 HTTP/1.1 101

202. None
203. None
204. None
205. None
206. None

207. Death, Taxes, and HTTP @JesseWilson @JakeWharton