keii.dev
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README.md
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README.md
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[](https://hex.pm/packages/wisp)
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[](https://hexdocs.pm/wisp/)
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A Gleam project 🧚
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Wisp is a practical Gleam web framework rapid development and easy maintenance.
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We worry about the hassle of web development, and you focus on writing your
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application.
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It is based around two concepts: handlers and middleware.
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# Handlers
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A handler is a function that takes a HTTP request and returns a HTTP
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response. A handler may also take other arguments, such as a "context" type
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defined in your application which may hold other state such as a database
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connection or user session.
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```gleam
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import wisp.{Request, Response}
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pub type Context {
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Context(secret: String)
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}
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pub fn handle_request(request: Request, context: Context) -> Response {
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wisp.ok()
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}
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```
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# Middleware
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A middleware is a function that takes a response returning function as its
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last argument, and itself returns a response. As with handlers both
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middleware and the functions they take as an argument may take other
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arguments.
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Middleware can be applied in a handler with Gleam's `use` syntax. Here the
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`log_request` middleware is used to log a message for each HTTP request
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handled, and the `serve_static` middleware is used to serve static files
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such as images and CSS.
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```gleam
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import wisp.{Request, Response}
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pub fn handle_request(request: Request) -> Response {
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use <- wisp.log_request
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use <- wisp.serve_static(req, under: "/static", from: "/public")
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wisp.ok()
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}
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```
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src/wisp.gleam
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src/wisp.gleam
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/// Wisp! A Gleam web framework.
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///
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/// ## Overview
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///
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/// Wisp is based around two concepts: handlers and middleware.
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///
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/// ### Handlers
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///
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/// A handler is a function that takes a HTTP request and returns a HTTP
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/// response. A handler may also take other arguments, such as a "context" type
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/// defined in your application which may hold other state such as a database
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/// connection or user session.
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///
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/// ```gleam
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/// import wisp.{Request, Response}
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///
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/// pub type Context {
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/// Context(secret: String)
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/// }
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///
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/// pub fn handle_request(request: Request, context: Context) -> Response {
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/// wisp.ok()
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/// }
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/// ```
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///
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/// ### Middleware
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///
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/// A middleware is a function that takes a response returning function as its
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/// last argument, and itself returns a response. As with handlers both
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/// middleware and the functions they take as an argument may take other
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/// arguments.
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///
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/// Middleware can be applied in a handler with Gleam's `use` syntax. Here the
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/// `log_request` middleware is used to log a message for each HTTP request
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/// handled, and the `serve_static` middleware is used to serve static files
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/// such as images and CSS.
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///
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/// ```gleam
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/// import wisp.{Request, Response}
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///
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/// pub fn handle_request(request: Request) -> Response {
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/// use <- wisp.log_request
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/// use <- wisp.serve_static(req, under: "/static", from: "/public")
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/// wisp.ok()
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/// }
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/// ```
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///
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import gleam/string_builder.{StringBuilder}
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import gleam/bit_builder.{BitBuilder}
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import gleam/bit_string