The Definitive Introduction to Falcon

This presentation refreshes you on HTTP and Python/WSGI, then proceeds to walk you through the process of creating a subset of MultiBlog - the multi-author blogging platform - using the Falcon WSGI framework.

You should come out of this knowing: 1) what Falcon is, 2) how to design an API using Falcon, and 3) how to automate testing of APIs implemented with Falcon.

Transcript

1. The Definitive Introduction to Falcon Alejandro Cabrera (alejandro.cabrera@rackspace.com) November 13, 2013 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
2. from pprint import pprint if __name__ == ’__main__’: meta = { ’author’ : ’Alejandro Cabrera’, ’email’ : ’alejandro.cabrera@rackspace.com’, ’objective’ : ’Introduce Falcon!’ } pprint(meta) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
3. About Me Software developer @ Rackspace Likes: Haskell, Python, Linux, open-source, automation, quality, cordiality Dislikes: Proprietary, manual processes, hostility Github: cabrera Twitter: @cppcabrera IRC: alcabrera @ freenode Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
4. Falcon Is. . . Falcon is a high-performance Python framework for building cloud APIs. It encourages the REST architectural style, and tries to do as little as possible while remaining highly effective. Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
5. Falcon Is. . . A simple web framework Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
6. Falcon Is. . . A simple web framework WSGI/Python Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
7. Falcon Is. . . A simple web framework WSGI/Python Fast Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
8. Why Falcon? Simple Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
9. Why Falcon? Simple Productive Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
10. Why Falcon? Simple Productive Fast Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
11. So Falcon Is Fast. . . Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
12. So Falcon Is Fast. . . Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
13. Falcon Is Fast Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
14. Falcon Is Fast Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
15. Let’s Talk About Falcon Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
16. Let’s Talk About Falcon Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
17. But First. . . HTTP Primer Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
18. But First. . . HTTP Primer WSGI Primer Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
19. HTTP: In Short HTTP/1.1 200 OK Connection: close Content-Length: 119 Content-Location: /v1/queues Content-Type: application/json; charset=utf-8 Date: Tue, 12 Nov 2013 19:45:55 GMT Server: gunicorn/18.0 { "queues": [ { "href": "/v1/queues/taco", "name": "taco" } ] } Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
20. HTTP: Status Codes Five classes: 100, 200, 300, 400, 500 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
21. HTTP: Status Codes Five classes: 100, 200, 300, 400, 500 100: Informational Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
22. HTTP: Status Codes Five classes: 100, 200, 300, 400, 500 100: Informational 200: Good - it worked Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
23. HTTP: Status Codes Five classes: 100, 200, 300, 400, 500 100: Informational 200: Good - it worked 300: Redirections Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
24. HTTP: Status Codes Five classes: 100, 200, 300, 400, 500 100: Informational 200: Good - it worked 300: Redirections 400: Client-side oops Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
25. HTTP: Status Codes Five classes: 100, 200, 300, 400, 500 100: Informational 200: Good - it worked 300: Redirections 400: Client-side oops 500: Server side error Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
26. HTTP: Response Status HTTP/1.1 200 OK Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
27. HTTP: Headers Like a dictionary Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
28. HTTP: Headers Like a dictionary Many standard-defined, some used by convention Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
29. HTTP: Headers Connection: close Content-Length: 119 Content-Location: /v1/queues Content-Type: application/json; charset=utf-8 Date: Tue, 12 Nov 2013 19:45:55 GMT Server: gunicorn/18.0 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
30. HTTP: Body Actual data Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
31. HTTP: Body Actual data Can be anything Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
32. HTTP: Body Actual data Can be anything Good idea - set Content-Type to be descriptive Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
33. HTTP: Body Actual data Can be anything Good idea - set Content-Type to be descriptive json -> application/json Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
34. HTTP: Body Actual data Can be anything Good idea - set Content-Type to be descriptive json -> application/json html -> text/html Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
35. HTTP: Body Actual data Can be anything Good idea - set Content-Type to be descriptive json -> application/json html -> text/html msgpack -> application/x-msgpack Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
36. HTTP: Body Actual data Can be anything Good idea - set Content-Type to be descriptive json -> application/json html -> text/html msgpack -> application/x-msgpack binary -> application/octet-stream Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
37. HTTP: Body { "links": [ { "href": "/v1/queues?marker=taco", "rel": "next" } ], "queues": [ { "href": "/v1/queues/taco", "name": "taco" } ] } Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
38. HTTP: Request A client makes a request Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
39. HTTP: Request A client makes a request The request carries information that a server uses to reply Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
40. HTTP: Request A client makes a request The request carries information that a server uses to reply What kind of request is it? (HTTP verb) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
41. HTTP: Request A client makes a request The request carries information that a server uses to reply What kind of request is it? (HTTP verb) How large is my payload? (Content-Length) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
42. HTTP: Request A client makes a request The request carries information that a server uses to reply What kind of request is it? (HTTP verb) How large is my payload? (Content-Length) What type of data am I sending? (Content-Type) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
43. HTTP: Request A client makes a request The request carries information that a server uses to reply What kind of request is it? (HTTP verb) How large is my payload? (Content-Length) What type of data am I sending? (Content-Type) What type of data can I receive? (Accept) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
44. HTTP: Response A server makes a response Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
45. HTTP: Response A server makes a response The response also carries metadata Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
46. HTTP: Response A server makes a response The response also carries metadata Was it successful? (status code) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
47. HTTP: Response A server makes a response The response also carries metadata Was it successful? (status code) What type of data am I replying with? (Content-Type) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
48. HTTP: Verbs This request/response cycle is further controlled by HTTP verbs: Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
49. HTTP: Verbs This request/response cycle is further controlled by HTTP verbs: HEAD Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
50. HTTP: Verbs This request/response cycle is further controlled by HTTP verbs: HEAD GET Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
51. HTTP: Verbs This request/response cycle is further controlled by HTTP verbs: HEAD GET PUT Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
52. HTTP: Verbs This request/response cycle is further controlled by HTTP verbs: HEAD GET PUT POST Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
53. HTTP: Verbs This request/response cycle is further controlled by HTTP verbs: HEAD GET PUT POST DELETE Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
54. HTTP: Verbs This request/response cycle is further controlled by HTTP verbs: HEAD GET PUT POST DELETE PATCH Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
55. HTTP: Routing Finally, the server needs to know what you want to access to respond Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
56. HTTP: Routing Finally, the server needs to know what you want to access to respond A route looks like: Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
57. HTTP: Routing GET /v1/queues HTTP/1.1 Host: localhost:8000 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
58. HTTP: Routing # ||| Method GET /v1/queues HTTP/1.1 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
59. HTTP: Routing # ||| Route GET /v1/queues HTTP/1.1 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
60. HTTP: Routing # ||| Protocol GET /v1/queues HTTP/1.1 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
61. HTTP: Routing (Host) Host: localhost:8000 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
62. HTTP: Routing The Host tells us which server to access Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
63. HTTP: Routing The Host tells us which server to access The URI tells us what resource to access Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
64. HTTP: Routing The Host tells us which server to access The URI tells us what resource to access The URI can also have a query string (more on this later) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
65. An Aside: REST REST is a style of writing web applications Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
66. An Aside: REST REST is a style of writing web applications In short, it means - follow the HTTP standard Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
67. An Aside: REST REST is a style of writing web applications In short, it means - follow the HTTP standard Key points: Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
68. An Aside: REST REST is a style of writing web applications In short, it means - follow the HTTP standard Key points: HEAD|GET are read-only, pure, safe operations Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
69. An Aside: REST REST is a style of writing web applications In short, it means - follow the HTTP standard Key points: HEAD|GET are read-only, pure, safe operations PUT|DELETE modify a resource, but should be idempotent Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
70. An Aside: REST REST is a style of writing web applications In short, it means - follow the HTTP standard Key points: HEAD|GET are read-only, pure, safe operations PUT|DELETE modify a resource, but should be idempotent POST creates an entity subordinate to the given URI Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
71. An Aside: REST REST is a style of writing web applications In short, it means - follow the HTTP standard Key points: HEAD|GET are read-only, pure, safe operations PUT|DELETE modify a resource, but should be idempotent POST creates an entity subordinate to the given URI PATCH modifies a portion of an entity Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
72. Now For: WSGI Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
73. Now For: WSGI (Not Whiskey) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
74. WSGI: What? A Pythonic approach to HTTP application development Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
75. WSGI: What? A Pythonic approach to HTTP application development Takes HTTP headers and metadata and stuffs them in dictionaries Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
76. WSGI: What? A Pythonic approach to HTTP application development Takes HTTP headers and metadata and stuffs them in dictionaries Takes body content and stores it as a stream Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
77. WSGI: What? A Pythonic approach to HTTP application development Takes HTTP headers and metadata and stuffs them in dictionaries Takes body content and stores it as a stream Think of it as: HTTP made easy Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
78. WSGI: Hello World def hello(env, start_response): print(env[’PATH_INFO’]) status = ’200 OK’ headers = [(’Content-Type’, ’text/plain’)] body = b’hello’ start_response(status, headers) return [body] Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
79. We Now Return to Our Scheduled Content Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
80. We Now Return to Our Scheduled Content Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
81. Falcon: WSGI Made Easy Falcon wraps WSGI and gives us: Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
82. Falcon: WSGI Made Easy Falcon wraps WSGI and gives us: Easy routing + method not allowed Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
83. Falcon: WSGI Made Easy Falcon wraps WSGI and gives us: Easy routing + method not allowed Request/response objects Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
84. Falcon: WSGI Made Easy Falcon wraps WSGI and gives us: Easy routing + method not allowed Request/response objects Automatic header setting Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
85. Falcon: WSGI Made Easy Falcon wraps WSGI and gives us: Easy routing + method not allowed Request/response objects Automatic header setting Clean, consistent exceptions (400s, 500s) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
86. Falcon: WSGI Made Easy Falcon wraps WSGI and gives us: Easy routing + method not allowed Request/response objects Automatic header setting Clean, consistent exceptions (400s, 500s) Classes to express responders Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
87. Falcon: Hello World import falcon class Hello(object): def on_get(self, request, response): response.body = b’hello’ response.status = falcon.HTTP_200 app = falcon.API() app.add_route(’/’, Hello()) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
88. Falcon: Request Objects Contain at least the following information: Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
89. Falcon: Request Objects Contain at least the following information: path - /v1/queues Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
90. Falcon: Request Objects Contain at least the following information: path - /v1/queues query string - detailed=True Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
91. Falcon: Request Objects Contain at least the following information: path - /v1/queues query string - detailed=True content length - how long is the body? Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
92. Falcon: Request Objects Contain at least the following information: path - /v1/queues query string - detailed=True content length - how long is the body? content type Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
93. Falcon: Request Objects Contain at least the following information: path - /v1/queues query string - detailed=True content length - how long is the body? content type uri - localhost:8000/v1/queues?detailed=True Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
94. Falcon: Request Objects Contain at least the following information: path - /v1/queues query string - detailed=True content length - how long is the body? content type uri - localhost:8000/v1/queues?detailed=True relative uri - /v1/queues?detailed=True Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
95. Falcon: Request Objects Contain at least the following information: path - /v1/queues query string - detailed=True content length - how long is the body? content type uri - localhost:8000/v1/queues?detailed=True relative uri - /v1/queues?detailed=True More! Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
96. Falcon: Request Objects Contain at least the following information: path - /v1/queues query string - detailed=True content length - how long is the body? content type uri - localhost:8000/v1/queues?detailed=True relative uri - /v1/queues?detailed=True More! Also has methods for handling query params! Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
97. Falcon: Response Objects Responses have: Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
98. Falcon: Response Objects Responses have: body - set this to return content to the client Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
99. Falcon: Response Objects Responses have: body - set this to return content to the client location - sets Location header Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
100. Falcon: Response Objects Responses have: body - set this to return content to the client location - sets Location header content type Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
101. Falcon: Response Objects Responses have: body - set this to return content to the client location - sets Location header content type etag Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
102. Falcon: Response Objects Responses have: body - set this to return content to the client location - sets Location header content type etag set header(s) - custom header handling Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
103. Falcon: Response Objects Responses have: body - set this to return content to the client location - sets Location header content type etag set header(s) - custom header handling More! Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
104. Crafting an API API == zip(routes, resources) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
105. Crafting an API API == zip(routes, resources) Route: a URI associated with one or more HTTP verbs Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
106. Crafting an API API == zip(routes, resources) Route: a URI associated with one or more HTTP verbs Resource: a responder that contains application logic Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
107. Crafting an API API == zip(routes, resources) Route: a URI associated with one or more HTTP verbs Resource: a responder that contains application logic Put them together! Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
108. Crafting an API API == zip(routes, resources) Route: a URI associated with one or more HTTP verbs Resource: a responder that contains application logic Put them together! One resource per route (usually) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
109. Crafting an API API == zip(routes, resources) Route: a URI associated with one or more HTTP verbs Resource: a responder that contains application logic Put them together! One resource per route (usually) Let’s practice with. . . Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
110. Crafting an API: MultiBlog — Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
111. Crafting an API: MultiBlog It helps to layout the routes and resources before writing even a single line of code Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
112. Crafting an API: MultiBlog It helps to layout the routes and resources before writing even a single line of code Let’s do that now Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
113. Crafting an API: MultiBlog GET /v1 GET /v1/health GET /v1/stats Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
114. Crafting an API: MultiBlog GET /v1 GET /v1/health GET /v1/stats GET /v1/authors POST /v1/authors Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
115. Crafting an API: MultiBlog GET /v1 GET /v1/health GET /v1/stats GET /v1/authors POST /v1/authors GET /v1/authors/{author} PATCH /v1/authors/{author} DELETE /v1/authors/{author} Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
116. Crafting an API: MultiBlog GET /v1 GET /v1/health GET /v1/stats GET /v1/authors POST /v1/authors GET /v1/authors/{author} PATCH /v1/authors/{author} DELETE /v1/authors/{author} GET /v1/blog/{author} POST /v1/blog/{author} Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
117. Crafting an API: MultiBlog GET /v1/authors POST /v1/authors GET /v1/authors/{author} PATCH /v1/authors/{author} DELETE /v1/authors/{author} GET /v1/blog/{author} POST /v1/blog/{author} GET /v1/blog/{author}/{post} PATCH /v1/blog/{author}/{post} DELETE /v1/blog/{author}/{post} Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
118. Crafting an API: MultiBlog # Management routes GET /v1 GET /v1/health GET /v1/stats Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
119. Crafting an API: MultiBlog # Listing and creating authors GET /v1/authors POST /v1/authors Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
120. Crafting an API: MultiBlog # Working with specific authors GET /v1/authors/{author} PATCH /v1/authors/{author} DELETE /v1/authors/{author} Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
121. Crafting an API: MultiBlog # Reading blog details, creating an entry GET /v1/blog/{author} POST /v1/blog/{author} Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
122. Crafting an API: MultiBlog # Working with existing posts GET /v1/blog/{author}/{post} PATCH /v1/blog/{author}/{post} DELETE /v1/blog/{author}/{post} Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
123. Falcon: Crafting a Resource Resources are classes that serve as responders Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
124. Falcon: Crafting a Resource Resources are classes that serve as responders Example follows: we’ll create a BlogEntry resource! Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
125. Falcon: Crafting a Resource Resources are classes that serve as responders Example follows: we’ll create a BlogEntry resource! Expresses part of the “existing posts” routes Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
126. Falcon: Crafting a Resource class BlogEntry(object): def __init__(self, db_client): self._post_ctrl = db_client Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
127. Falcon: Crafting a Resource class BlogEntry(object): def __init__(self, db_client): self._post_ctrl = db_client def on_get(self, request, response, author, post): content = self._post_ctrl.get(author, post) if not content: raise falcon.exceptions.HTTPNotFound() response.content_type = ’application/json’ response.body = content[’body’] Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
128. Falcon: Crafting a Resource class BlogEntry(object): def __init__(self, db_client): self._post_ctrl = db_client def on_get(self, request, response, author, post): content = self._post_ctrl.get(author, post) if not content: raise falcon.exceptions.HTTPNotFound() response.content_type = ’application/json’ response.body = content[’body’] def on_delete(self, request, response, author, post): self._post_ctrl.delete(author, post) response.status = falcon.HTTP_204 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
129. Falcon: Crafting a Resource class BlogEntry(object): def __init__(self, db_client): self._post_ctrl = db_client Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
130. Falcon: Crafting a Resource class BlogEntry(object): # ||| responds to GET requests def on_get(self, request, response, author, post): content = self._post_ctrl.get(author, post) if not content: raise falcon.exceptions.HTTPNotFound() response.content_type = ’application/json’ response.body = content[’body’] Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
131. Falcon: Crafting a Resource class BlogEntry(object): def on_get(self, request, response, author, post): ... # ||| Returning a 404 if not content: raise falcon.exceptions.HTTPNotFound() ... Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
132. Falcon: Crafting a Resource class BlogEntry(object): def on_get(self, request, response, author, post): ... # ||| user-visible response: 200 OK by default response.content_type = ’application/json’ response.body = content[’body’] Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
133. Falcon: Crafting a Resource class BlogEntry(object): # ||| Responds to DELETEs def on_delete(self, request, response, author, post): self._post_ctrl.delete(author, post) response.status = falcon.HTTP_204 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
134. Falcon: Crafting a Resource class BlogEntry(object): # ||| Request object def on_get(self, request, response, author, post): ... Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
135. Falcon: Crafting a Resource class BlogEntry(object): # ||| Response object def on_get(self, request, response, author, post): ... Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
136. Falcon: Crafting a Resource class BlogEntry(object): # ||| URI template args def on_get(self, ..., author, post): ... Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
137. Falcon: Crafting a Resource class BlogEntry(object): def on_patch(...): pass Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
138. Falcon: Crafting a Resource class BlogEntry(object): def on_patch(...): pass # Left as an exercise for the reader! Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
139. Falcon: Exposing the API Here, we come back to routes Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
140. Falcon: Exposing the API Here, we come back to routes To connect a resource to a route. . . Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
141. Falcon: Exposing the API # blog.py app = falcon.API() app.add_route(’/v1/blog/{author}/{post}’, BlogEntry(db_client)) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
142. Falcon: Exposing the API # ||| Falcon’s API object app = falcon.API() Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
143. Falcon: Exposing the API # ||| The route app.add_route(’/v1/blog/{author}/{post}’, ...) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
144. Falcon: Exposing the API # ||| The responder app.add_route(..., BlogEntry(db_client)) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
145. Falcon: Exposing the API # ||| URI templates # ||| passed as param to responder app.add_route(’/v1/blog/{author}/{post}’, ...) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
146. Falcon: Making it Fly Now we have to run it For this demo, we’ll use gunicorn Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
147. Falcon: Make it Fly $ pip install gunicorn ... Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
148. Falcon: Make it Fly $ pip install gunicorn ... Successfully installed gunicorn Cleaning up... Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
149. Falcon: Make it Fly $ gunicorn blog:app Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
150. Falcon: Make it Fly $ gunicorn blog:app [INFO] Starting gunicorn 18.0 [INFO] Listening at: http://127.0.0.1:8000 (6194) [INFO] Using worker: sync [INFO] Booting worker with pid: 6199 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
151. Falcon: Is It Flying Yet? Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
152. Falcon: Is It Flying Yet? Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
153. Falcon: Manual Testing Allow me to recommend httpie: Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
154. Falcon: Manual Testing Allow me to recommend httpie: It’s built on python-requests Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
155. Falcon: Manual Testing Allow me to recommend httpie: It’s built on python-requests It’s human-friendly Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
156. Falcon: Manual Testing Allow me to recommend httpie: It’s built on python-requests It’s human-friendly It’s easy to install Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
157. Falcon: Manual Testing Allow me to recommend httpie: It’s built on python-requests It’s human-friendly It’s easy to install It’s well-behaved and handles HTTP really well Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
158. Falcon: Manual Testing $ pip install httpie ... Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
159. Falcon: Manual Testing $ pip install httpie ... Successfully installed httpie Cleaning up... Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
160. Falcon: Manual Testing $ http get localhost:8000/v1/blog/alej/1 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
161. Falcon: Manual Testing $ http get localhost:8000/v1/blog/alej/1 HTTP/1.1 200 OK Connection: close Content-Type: application/text Date: Tue, 12 Nov 2013 20:13:58 GMT Server: gunicorn/18.0 Transfer-Encoding: chunked Cool story, bro. Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
162. Falcon: Manual Testing $ http get localhost:8000/v1/alej/1 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
163. Falcon: Manual Testing $ http get localhost:8000/v1/alej/1 HTTP/1.1 404 Not Found Connection: close Content-Length: 0 Date: Tue, 12 Nov 2013 20:49:17 GMT Server: gunicorn/18.0 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
164. Falcon: Manual Testing $ http post localhost:8000/v1/blog/alej/1 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
165. Falcon: Manual Testing $ http post localhost:8000/v1/blog/alej/1 HTTP/1.1 405 Method Not Allowed Allow: GET Connection: close Content-Length: 0 Date: Tue, 12 Nov 2013 20:50:02 GMT Server: gunicorn/18.0 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
166. Falcon: Manual Testing $ http delete localhost:8000/v1/blog/alej/1 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
167. Falcon: Manual Testing $ http delete localhost:8000/v1/blog/alej/1 HTTP/1.1 204 No Content Connection: close Date: Tue, 12 Nov 2013 20:50:35 GMT Server: gunicorn/18.0 Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
168. Falcon: Automated Testing Manual testing is kinda cool. . . Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
169. Falcon: Automated Testing Manual testing is kinda cool. . . . . . but not ideal for long-term maintenance Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
170. Falcon: Automated Testing Manual testing is kinda cool. . . . . . but not ideal for long-term maintenance Unit testing with Falcon is pretty easy Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
171. Falcon: Automated Testing Manual testing is kinda cool. . . . . . but not ideal for long-term maintenance Unit testing with Falcon is pretty easy Functional testing with Falcon + python-requests is doable, as well Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
172. Falcon: Unit Testing (The Base Class) First, let’s start with a base class to help us simulate requests Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
173. Falcon: Unit Testing (The Base Class) class TestBase(unittest.TestCase): def setUp(self): self.app = blog.app self.srmock = falcon.testing.StartResponseMock() Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
174. Falcon: Unit Testing (The Base Class) class TestBase(unittest.TestCase): def setUp(self): self.app = blog.app self.srmock = falcon.testing.StartResponseMock() def simulate_request(self, path, ...): env = falcon.testing.create_environ( path=path, **kwargs ) return self.app(env, self.srmock) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
175. Falcon: Unit Testing (The Base Class) class TestBase(unittest.TestCase): def setUp(self): self.app = blog.app self.srmock = falcon.testing.StartResponseMock() def simulate_request(self, path, ...): env = falcon.testing.create_environ( path=path, **kwargs ) return self.app(env, self.srmock) def simulate_get(self, *args, **kwargs): kwargs[’method’] = ’GET’ return self.simulate_request(*args, **kwargs) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
176. Falcon: Unit Testing (The Base Class) # ||| unittest as foundation class TestBase(unittest.TestCase): Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
177. Falcon: Unit Testing (The Base Class) class TestBase(unittest.TestCase): def setUp(self): # ||| your blog API self.app = blog.app self.srmock = falcon.testing.StartResponseMock() Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
178. Falcon: Unit Testing (The Base Class) class TestBase(unittest.TestCase): # ||| generic request handler def simulate_request(self, path, ...): env = falcon.testing.create_environ( path=path, **kwargs ) return self.app(env, self.srmock) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
179. Falcon: Unit Testing (The Base Class) class TestBase(unittest.TestCase): def simulate_request(self, path, ...): # ||| create a mock WSGI environment env = falcon.testing.create_environ( path=path, **kwargs ) return self.app(env, self.srmock) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
180. Falcon: Unit Testing (The Base Class) class TestBase(unittest.TestCase): # ||| a method for simulating GETs def simulate_get(self, *args, **kwargs): kwargs[’method’] = ’GET’ return self.simulate_request(*args, **kwargs) ... Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
181. Falcon: Unit Testing (The Base Class) class TestBase(unittest.TestCase): # more methods, more methods! (just like GET) def simulate_head(self, *args, **kwargs): ... def simulate_put(self, *args, **kwargs): ... def simulate_delete(self, *args, **kwargs): ... def simulate_patch(self, *args, **kwargs): ... def simulate_post(self, *args, **kwargs): ... Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
182. Falcon: Unit Testing (The Test) With a handy base class in hand, let’s actually test this thing! Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
183. Falcon: Unit Testing (The Test) @ddt.ddt class TestBlogEntry(base.TestBase): def setUp(self): super(TestBlogEntry, self).setUp() # create a blog post self.entry_path = ’/v1/blog/alej/1’ self.simulate_post(’/v1/blog/alej’) def tearDown(self): self.simulate_delete(’/v1/blog/alej/1’) super(TestBlogEntry, self).tearDown() Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
184. Falcon: Unit Testing (The Test) @ddt.ddt class TestBlogEntry(base.TestBase): ... def test_get_returns_200_when_entry_exists(self): self.simulate_get(self.entry_path) self.assertEqual(self.srmock.status, falcon.HTTP_200) def test_get_returns_404_when_entry_not_found(self): self.simulate_get(’/v1/blog/alej/notfound’) self.assertEqual(self.srmock.status, falcon.HTTP_404) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
185. Falcon: Unit Testing (The Test) @ddt.ddt class TestBlogEntry(base.TestBase): ... @ddt.data([self.entry_path, ’/v1/blog/alej/notfound’]) def test_delete_always_returns_204(self, path): self.simulate_delete(path) self.assertEqual(self.srmock.status, falcon.HTTP_204) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
186. Falcon: Unit Testing (The Test) @ddt.ddt class TestBlogEntry(base.TestBase): ... @ddt.data(’post’, ’put’, ’patch’, ’head’) def test_method_not_allowed_respected(self, method): getattr(self, ’on_’ + method)(self.entry_path) self.assertEqual(self.srmock.status, falcon.HTTP_405) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
187. Falcon: Run the Tests $ nosetests -v tests/test_blog.py Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
188. Falcon: Run the Tests $ nosetests -v tests/test_blog.py ... Ran 8 tests in 0.008s OK Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
189. Falcon: Run the Tests Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
190. Recap With a basic understanding of HTTP. . . Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
191. Recap With a basic understanding of HTTP. . . . . . adding a smidgen of WSGI. . . Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
192. Recap With a basic understanding of HTTP. . . . . . adding a smidgen of WSGI. . . . . . a couple of routes. . . Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
193. Recap With a basic understanding of HTTP. . . . . . adding a smidgen of WSGI. . . . . . a couple of routes. . . . . . and a dash of resources . . . Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
194. Recap With a basic understanding of HTTP. . . . . . adding a smidgen of WSGI. . . . . . a couple of routes. . . . . . and a dash of resources . . . . . . allowed to bake in a test oven for a few minutes . . . Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
195. Recap With a basic understanding of HTTP. . . . . . adding a smidgen of WSGI. . . . . . a couple of routes. . . . . . and a dash of resources . . . . . . allowed to bake in a test oven for a few minutes . . . . . . you, too, can have a Falcon-powered web application! Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
196. Quick Takes How do I read the request contents? Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
197. Quick Takes How do I read the request contents? request.stream.read() Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
198. Quick Takes How do I set a header for the response? Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
199. Quick Takes How do I set a header for the response? response.set_header(’X-Awesomeness’, ’You’) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
200. Quick Takes Where can I find all the errors falcon can raise? (400s, 500s) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
201. Quick Takes Where can I find all the errors falcon can raise? (400s, 500s) from falcon import exceptions dir(exceptions) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
202. Quick Takes How can I generate an etag? Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
203. Quick Takes How can I generate an etag? import hashlib md5 = hashlib.md5 response.etag = md5(request.stream.read()).hexdigest() Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
204. Quick Takes How can I retrieve URI query parameters? Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
205. Quick Takes How can I retrieve URI query parameters? limit = request.get_param_as_int(’limit’) detailed = request.get_param_as_bool(’detailed’) marker = request.get_param(’marker’) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
206. Falcon: Next Steps Write your own application Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
207. Falcon: Next Steps Write your own application Add storage Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
208. Falcon: Next Steps Write your own application Add storage Learn about middleware Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
209. Falcon: Next Steps Write your own application Add storage Learn about middleware Leveling up your tests: tox, mock, httpretty Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
210. Falcon: Next Steps Write your own application Add storage Learn about middleware Leveling up your tests: tox, mock, httpretty Contribute! Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
211. Falcon: Thanks To These Falconians! Kurt Griffiths (kgriffs) created Falcon and is its current maintainer. Many thanks to all the mighty fine contributors to the project, listed below by date of contribution: Alejandro Cabrera (cabrera) Chad Lung (chadlung) Josh Brand (joshbrand) Jamie Painter (painterjd) Flavio Percoco (flaper87) Randall Burt (rs-randallburt) Zhihao Yuan (lichray) Ashutosh Das (pyprism) Emanuele Rocca (ema) Flavio Percoco (flaper87) Soren Hansen (sorenh) Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
212. Packages Referenced ddt python-requests falcon httpie nose Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
213. Questions? Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon
214. Thanks! Alejandro Cabrera (alejandro.cabrera@rackspace.com) The Definitive Introduction to Falcon