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Flask is a micro web framework written in Python.It is classified as a microframework because it does not require particular tools or libraries. [2] It has no database abstraction layer, form validation, or any other components where pre-existing third-party libraries provide common functions.
environ is a dictionary containing CGI environment variables as well as other request parameters and metadata under well-defined keys. [9] start_response is a callable itself, taking two positional parameters, status and response_headers. Line 2 calls start_response, specifying "200 OK" as the HTTP status and a "Content-Type" response header.
The request/response message consists of the following: Request line, such as GET /logo.gif HTTP/1.1 or Status line, such as HTTP/1.1 200 OK, Headers; An empty line; Optional HTTP message body data; The request/status line and headers must all end with <CR><LF> (that is, a carriage return followed by a line feed).
A web framework (WF) or web application framework (WAF) is a software framework that is designed to support the development of web applications including web services, web resources, and web APIs.
The EventSource API is standardized as part of HTML Living Standard [1] by the WHATWG. The media type for SSE is text/event-stream . All modern browsers support server-sent events: Firefox 6+, Google Chrome 6+, Opera 11.5+, Safari 5+, Microsoft Edge 79+.
Requests is an HTTP client library for the Python programming language. [2] [3]Requests is one of the most downloaded Python libraries, [2] with over 300 million monthly downloads. [4]
Its design was inspired by Rails, Flask, Bottle, and Yesod. [5] It is dually licensed under the MIT License and the Apache License. To create a web server with Rocket, the user will define an application, then use the "mount" function to attach "routes" to it. Each "route" is a rust function with a macro attached to it.
Python web frameworks that run on Google App Engine include Django, CherryPy, Pyramid, Flask, and web2py as well as a Google-written web app framework and several others designed specifically for the platform that was created after the release. [6]