Wed Jun 29 03:08:25 UTC 2011 pix@kepibu.org

* Wrap drakma:http-request so we can have automatic retries on timeouts

--- old-claki/claki.lisp 2015-10-12 08:23:36.000000000 +0000

+++ new-claki/claki.lisp 2015-10-12 08:23:36.000000000 +0000

@@ -6,13 +6,25 @@

#+(or) (clrhash *last-modified*)

+(defun http-request (&rest drakma-args)

+ "A wrapper around drakma:http-request which automatically retries the request

+in the event of a timeout."

+ (let ((times-failed 0))

+ (tagbody

+ :fetch-page

+ (handler-case (return-from http-request (apply #'drakma:http-request drakma-args))

+ (usocket:timeout-error ()

+ (sleep (* 60 (expt 2 times-failed)))

+ (incf times-failed)

+ (go :fetch-page))))))

+

(defun get-cliki-page (url)

"Returns a page from cliki if it has been modified since we last saw it or nil

if it has not been modified. Signals an error otherwise."

(multiple-value-bind (page status headers)

- (drakma:http-request (format nil "http://cliki.net/~a" url)

- :additional-headers (when (gethash url *last-modified*)

- `((:if-modified-since (gethash url *last-modified*)))))

+ (http-request (format nil "http://cliki.net/~a" url)

+ :additional-headers (when (gethash url *last-modified*)

+ `((:if-modified-since (gethash url *last-modified*)))))

;; FIXME: this doesn't work all that well: it turns out cliki uses a single

;; last-modified header for the entire wiki, rather than one per page, so we

;; aren't saving ourselves (or cliki) much with this.

@@ -176,14 +188,14 @@

(defun revert-page (url current-version to-version)

(multiple-value-bind (page status headers)

- (drakma:http-request (format nil "http://cliki.net/edit/~a" url)

- :method :post

- :parameters `(("version" . ,current-version)

- ("T0" . "BODY")

- ("E0" . ,(get-cliki-source url to-version))

- ("summary" . "Spam detected, reverting to Known-Good.")

- ("captcha" . "lisp")

- ("name" . "Claki (Revertobot Beta)")))

+ (http-request (format nil "http://cliki.net/edit/~a" url)

+ :method :post

+ :parameters `(("version" . ,current-version)

+ ("T0" . "BODY")

+ ("E0" . ,(get-cliki-source url to-version))

+ ("summary" . "Spam detected, reverting to Known-Good.")

+ ("captcha" . "lisp")

+ ("name" . "Claki (Revertobot Beta)")))

(declare (ignore headers))

(cond

((and (= status 200)

@@ -198,7 +210,7 @@

returns the text you should POST to revert a cliki page to the given version."

(or (find-in-cache url version)

(multiple-value-bind (page status headers)

- (drakma:http-request (format nil "http://cliki.net/~a?source&v=~a" url version))

+ (http-request (format nil "http://cliki.net/~a?source&v=~a" url version))

(declare (ignore headers))

(cond

((= 200 status)