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

‘Tis impossible to be sure of anything but death, taxes, and HTTP. This talk will explore some of the overhead inherent to HTTP and how it can be optimized or eliminated for more efficient networking.

Video: https://youtu.be/6uroXz5l7Gk?t=357

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