blog

Diagram

graph LR
  subgraph blog
    Article[(Article)]
    User[(User)]
    File[(File)]
    Storage[("Storage\n(Files)")]
    API[[API]]
    ArticleFunction
    UserFunction
    FileFunction
    ImageReduceFunction
    AuthClient
    GenerateFunction
    CDN[[CDN]]
  end

  Owner((Owner))
  Internet((Internet))

  Owner -- "post/update/publish" --> API
  ArticleFunction --> Article
  UserFunction --> User
  API --> ArticleFunction
  API --> UserFunction
  API --upload--> FileFunction
  API -.- AuthClient
  AuthClient ---> IDProvider
  API -- publish --> GenerateFunction
  Article --> GenerateFunction
  User --> GenerateFunction
  FileFunction --> Storage
  GenerateFunction --> Storage
  FileFunction --> File
  Storage -.- CDN
  File -.put event.-> ImageReduceFunction
  Storage --> ImageReduceFunction
  ImageReduceFunction --> Storage
  CDN -- view--- Internet

Table: User

Schema

AttrName	Type	Key
Id	S	Hash
Attr	S	Range
Name	S

Attributes

• Id: User ID
• Attr: Always Main
• Name: Unique user name to be used in URL path

Index: NameIndex

AttrName	Key
Name	Hash

Table: Article

TODO

Table: File

Schema

AttrName	Type	Key
Key	S	Hash
Attr	S	Range
UserId	S
Name	S
CType	S
TS	N
Size	N
W	N
H	N
Status	S
UserIdx	S

Attributes

• Key: S3 object key. Not reused. randomized string.
• Attr: Attributes of this object
  • Orig: Original file
  • Rep:{W}x{H}: Reduced replica
• UserId: User ID by IDP
• UserIdx: Same as UserId when Attr is Orig. Otherwise, empty.
• Name: Filename
• CType: Content Type
• TS: Created at
• Size: Image size(bytes)
• W,H: Widht and height
• Status: reserved|available|deleting|deleted

Index: UserIndex

AttrName	Key
UserIdx	Hash
TS	Range

URL path design

• /{User:Id}: Index
• /{User:Id}/{Article:Id}: Article
• /files/{File:Key}/{File:Attr}.{File:Ext}