76 lines
4.0 KiB
Racket
76 lines
4.0 KiB
Racket
#lang scribble/doc
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@(require "web-server.rkt")
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@title[]{Simple Single Servlet Servers}
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@(require (for-label web-server/servlet-env
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web-server/servlet-dispatch
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web-server/http
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web-server/managers/lru
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web-server/private/util
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web-server/dispatchers/dispatch
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web-server/configuration/configuration-table
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web-server/configuration/responders
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web-server/dispatchers/dispatch-log
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racket/serialize
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web-server/stuffers
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racket/list))
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@defmodule[web-server/servlet-dispatch]{
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These functions optimize the construction of dispatchers and launching of servers for single servlets and interactive development.
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@defproc[(dispatch/servlet
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[start (request? . -> . response/c)]
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[#:regexp regexp regexp? #rx""]
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[#:stateless? stateless? boolean? #f]
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[#:stuffer stuffer (stuffer/c serializable? bytes?) default-stuffer]
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[#:manager manager manager? (make-threshold-LRU-manager #f (* 1024 1024 64))]
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[#:namespace namespace (listof module-path?) empty]
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[#:current-directory servlet-current-directory path-string? (current-directory)])
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dispatcher/c]{
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@racket[serve/servlet] starts a server and uses a particular dispatching sequence. For some applications, this
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nails down too much, but users are conflicted, because the interface is so convenient. For those users, @racket[dispatch/servlet]
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does the hardest part of @racket[serve/servlet] and constructs a dispatcher just for the @racket[start] servlet.
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The dispatcher responds to requests that match @racket[regexp]. The current directory
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of servlet execution is @racket[servlet-current-directory].
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If @racket[stateless?] is true, then the servlet is run as a stateless @racketmod[web-server] module and @racket[stuffer] is used
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as the @tech[#:doc '(lib "web-server/scribblings/web-server.scrbl")]{stuffer}.
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The servlet is loaded with @racket[manager] as its continuation manager. (The default manager limits the amount of memory to 64 MB and
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deals with memory pressure as discussed in the @racket[make-threshold-LRU-manager] documentation.)
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The modules specified by @racket[servlet-namespace] are shared with other servlets.
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}
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@defproc[(serve/launch/wait
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[make-dispatcher (semaphore? . -> . dispatcher/c)]
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[#:launch-path launch-path (or/c false/c string?) #f]
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[#:banner? banner? boolean? #f]
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[#:listen-ip listen-ip (or/c false/c string?) "127.0.0.1"]
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[#:port port number? 8000]
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[#:ssl-cert ssl-cert (or/c false/c path-string?) #f]
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[#:ssl-key ssl-key (or/c false/c path-string?) #f])
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void]{
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The other interesting part of @racket[serve/servlet] is its ability to start up a server and immediately
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launch a browser at it. This is provided by @racket[serve/launch/wait].
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It starts a server using the result of @racket[make-dispatcher] as the dispatcher. @racket[make-dispatcher] is supplied
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a semaphore that if posted, will cause the server to quit.
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If @racket[launch-path] is not false, then a browser is launched with that path appended to the URL to the server itself.
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If @racket[banner?] is true, then a banner is printed informing the user of the server's URL.
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The server listens on @racket[listen-ip] and port @racket[port]. If @racket[listen-ip] is @racket[#f], then the server accepts
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connections to all of the listening machine's addresses. Otherwise, the server accepts connections only at the interface(s) associated with the given string.
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For example, providing @racket["127.0.0.1"] (the default) as @racket[listen-ip] creates a server that accepts only connections to @racket["127.0.0.1"] (the loopback interface) from the local machine.
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If @racket[ssl-key] and @racket[ssl-cert] are not false, then the server runs in HTTPS mode with @racket[ssl-cert]
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and @racket[ssl-key] as paths to the certificate and private key.
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}
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}
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