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> boiler plate code remove : lombok, mapstruct, modelMapper

  • https://chatgpt.com/c/7d23b0fe-a7a5-43d5-9ced-69d4a344e31a - error handling
  • https://chatgpt.com/c/f4a0c9cd-c6cb-414e-888c-605c2d50340c - ext server deploy

web

0 web request

  • idempotent : PUT
  • non-idempotent

1 WebSocket connection - intro

  • persistent(stateful), bi-directional communication channel between a client and a server over a single, long-lived TCP connection.
  • WebSocket connections remain open and allow for real-time data exchange between the client and the serve.

2 web-aware Spring ApplicationContext : WebApplicationContext

  • IAC container for springMVC application.
  • AC aware of the web-specific features and contexts in a Servlet environment.
    • can access the ServletContext, provides access to the Servlet API
    • access the ServletConfig
  • supports web-scopes for beans
    • request - bean is created for each HTTP request
    • session -
    • global session - never used
    • Web socket - bean is created for each WebSocket connection

3 CORS

  • https://chatgpt.com/c/79fe00c5-9852-4956-b0ec-be9a6657359c

4 security threats

  • XSS and CSRF
  • https://chatgpt.com/c/c86b5fd1-c1b8-4a6b-bb8b-bbd832a606aa
  • https://chatgpt.com/c/734bd77f-75d3-4be2-acbc-d80ef8b61b21
  • https://chatgpt.com/c/e1547ff9-6ce4-4645-8fae-56d1924daa47

5 MIME type

  • consumes 
    "application/json"                    Accepts JSON input
"application/xml"                     Accepts XML input
"text/plain"                          Accepts plain text
"multipart/form-data"                 Accepts file uploads
"application/x-www-form-urlencoded"   Accepts form data
  • produces 
    "application/json"  Returns JSON
"application/xml"   Returns XML
"text/html"         Returns HTML
"text/csv"          Returns CSV
"application/pdf"   Returns PDF


APPLICATION_OCTET_STREAM - Generic binary (default)
APPLICATION_PDF - For PDF files
IMAGE_JPEG/IMAGE_PNG - For images
APPLICATION_ZIP - For ZIP archives

Content-Disposition Header
- attachment forces download dialog
- filename suggests the saved filename