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http-server.lisp
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http-server.lisp
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;;
;; Copyright 2016 Drew Thoreson
;;
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; published by the Free Software Foundation, version 2 of the
;; License.
;;
;; This program is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program; if not, see <http://www.gnu.org/licenses/>.
;;
;; http-server.lisp
;;
;; This package defines the HTTP API for interacting with the aggregator.
(in-package :http-server)
(defparameter *port* (config:get-value '(:server :port)))
(defparameter *document-root* (config:get-value '(:server :document-root)))
(defvar server (make-instance 'hunchentoot:easy-acceptor
:port *port*
:document-root *document-root*))
(let ((show-errors (config:get-value '(:server :show-lisp-errors)))
(access-log (config:get-value '(:server :access-log-file)))
(message-log (config:get-value '(:server :message-log-file))))
(when (eq :true show-errors)
(setf *show-lisp-errors-p* t))
(unless (eq :default access-log)
(setf (acceptor-access-log-destination server) access-log))
(unless (eq :default message-log)
(setf (acceptor-message-log-destination server) message-log)))
;; Hunchentoot apparently doesn't provide any way to check this, so we keep
;; track of it ourselves.
(defvar server-started nil)
(defun start ()
"Start the Aleph HTTP server."
(if server-started
(warn "Server already running")
(progn
(hunchentoot:start server)
(setf server-started t))))
(defun stop ()
"Stop the Aleph HTTP server."
(if server-started
(progn
(hunchentoot:stop server)
(setf server-started nil))
(warn "Server is not started")))
(defun make-response (obj)
"Respond to a request by sending OBJ to the client, encoded as JSON."
(setf (content-type*) "application/json; charset=utf-8")
(json:encode-json-to-string obj))
(defun not-found ()
"Respond with HTTP code 404."
(setf (return-code*) +HTTP-NOT-FOUND+)
nil)
(defmacro method-case (&body cases)
`(case (request-method*)
,@cases
(otherwise
(setf (return-code*) +HTTP-METHOD-NOT-ALLOWED+)
nil)))
(define-easy-handler (feeds :uri "/feeds")
((since :parameter-type 'integer))
(feed-store:with-connection
(make-response
(or (feed-store:query-feeds
:since (cond
((not since) nil)
; SINCE is a (negative) number of seconds in the past
((< since 0) (+ (get-universal-time) since))
; SINCE is a UNIX timestamp
(t (+ since 2208988800))))
; XXX: we pass an empty vector, since nil is encoded as the null
; JSON value.
#()))))
(define-easy-handler (items :uri "/items")
((limit :init-form 100
:parameter-type 'integer)
(feed :parameter-type 'integer)
(unread :parameter-type 'boolean)
format)
(feed-store:with-connection
(let ((items (feed-store:query-items :limit limit :feed feed :unread unread)))
(make-response (cond ((string= format "raw") items)
(t (mapcar #'curator:curate items)))))))
(define-easy-handler (add-feed :uri "/add-feed")
((name :init-form "Untitled")
(fetcher :init-form "http")
(parser :init-form "auto")
(schedule :init-form "periodic")
(scheduleparameter :init-form "30")
source
(tags :init-form '()))
(feed-store:with-connection
(let ((feed (controller:add-feed name source
:loc-type fetcher
:feed-type parser
:schedule schedule
:schedule-parameter scheduleparameter
:tags tags)))
; TODO: update synchronously
(redirect (format nil "/feeds/~a" (feed-store:feed-id feed))))))
;; TODO: refactor to consolidate code for extracting and validating ID from URL
(defun feed-handler ()
"Serve the feed at /feeds/<id>."
(feed-store:with-connection
(let* ((id (parse-integer (subseq (request-uri*) 7)
:junk-allowed t))
(feed (feed-store:get-feed id))
(fmt (get-parameter "format")))
(if feed
(method-case
((:GET)
(make-response (cond ((string= fmt "raw") feed)
(t (curator:curate feed)))))
((:DELETE)
(feed-store:rm-feed (feed-store:feed-id feed))
nil))
(not-found)))))
(defun feed-items-handler ()
"Serve items for the feed at /feeds/<id>."
(feed-store:with-connection
(let* ((id (parse-integer (subseq (request-uri*) 7)
:junk-allowed t))
(fmt (get-parameter "format"))
(unread (get-parameter "unread")))
(if (feed-store:get-feed id)
(let ((items (feed-store:query-items :feed id :unread unread)))
(method-case
((:GET)
(make-response (cond ((string= fmt "raw") items)
(t (mapcar #'curator:curate items)))))
((:DELETE)
;TODO
nil)))
(not-found)))))
(defun feed-update-handler ()
"Update the feed at /feeds/<id>"
(feed-store:with-connection
(let ((id (parse-integer (subseq (request-uri*) 7)
:junk-allowed t)))
(if (feed-store:get-feed id)
(method-case
((:POST)
(make-response (controller:update-feed id))))
(not-found)))))
(defun feed-mark-read-handler ()
"Mark all items read for the feed at /feeds/<id>."
(feed-store:with-connection
(let ((id (parse-integer (subseq (request-uri*) 7)
:junk-allowed t)))
(if (feed-store:get-feed id)
(method-case
((:POST)
(feed-store:mark-feed-read id)
nil))
(not-found)))))
(defun mark-all-read-handler ()
"Mark all items read."
(feed-store:with-connection
(method-case
((:POST)
(feed-store:mark-all-read)
nil))))
(defun update-all-handler ()
"Update all feeds."
(feed-store:with-connection
(controller:update-all)))
(defun item-mark-read-handler ()
"Mark the item read at /items/<id>."
(feed-store:with-connection
(let ((id (parse-integer (subseq (request-uri*) 7)
:junk-allowed t)))
(if (feed-store:get-item id)
(method-case
((:POST)
(feed-store:mark-item-read id)
nil))
(not-found)))))
(defun item-handler ()
"Serve the item at /items/<id>."
(feed-store:with-connection
(let* ((id (parse-integer (subseq (request-uri*) 7)
:junk-allowed t))
(item (feed-store:get-item id)))
(if item
(method-case
((:GET)
(setf (content-type*) "application/json; charset=utf-8")
(json:encode-json-to-string item)))
(not-found)))))
(defun index-handler ()
"Serve <path>/index.html when <path>/ is requested."
(handle-static-file
; FIXME: join pathnames portably
(format nil "~a~aindex.html"
*document-root*
(puri:uri-path (puri:parse-uri (request-uri*))))))
(defun no-extension-handler ()
"Serve <page>.html when <page> is requested."
(handle-static-file
; FIXME: join pathnames portably
(format nil "~a~a.html"
*document-root*
(puri:uri-path (puri:parse-uri (request-uri*))))))
(setf *dispatch-table*
(list (create-regex-dispatcher "^/feeds/\\d+/items/?$" #'feed-items-handler)
(create-regex-dispatcher "^/feeds/\\d+/update/?$" #'feed-update-handler)
(create-regex-dispatcher "^/feeds/\\d+/mark-read/?$" #'feed-mark-read-handler)
(create-regex-dispatcher "^/feeds/\\d+/?$" #'feed-handler)
(create-regex-dispatcher "^/feeds/mark-read/?$" #'mark-all-read-handler)
(create-regex-dispatcher "^/feeds/update/?$" #'update-all-handler)
(create-regex-dispatcher "^/items/\\d+/mark-read/?$" #'item-mark-read-handler)
(create-regex-dispatcher "^/items/\\d+/?$" #'item-handler)
(create-regex-dispatcher "^/items/mark-read/?$" #'mark-all-read-handler)
'hunchentoot:dispatch-easy-handlers
(create-regex-dispatcher "/$" #'index-handler)
(create-regex-dispatcher "/[^\\./]*$" #'no-extension-handler)))