breezewiki/archiver/archiver.rkt

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#lang racket/base
(require racket/file
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racket/format
racket/function
racket/list
racket/path
racket/sequence
racket/string
net/url
net/mime
file/sha1
net/http-easy
db
json
"archiver-database.rkt"
"../lib/html-parsing/main.rkt"
"../lib/mime-types.rkt"
"../lib/syntax.rkt"
"../lib/tree-updater.rkt"
"../lib/url-utils.rkt"
"../lib/xexpr-utils.rkt"
"../lib/archive-file-mappings.rkt")
(provide
basename->name-for-query
image-url->values
hash->save-dir
all-stages)
(module+ test
(require rackunit))
(define archive-root (anytime-path ".." "storage/archive"))
(make-directory* archive-root)
(define sources '#hasheq((style . 1) (page . 2)))
(define (get-origin wikiname)
(format "https://~a.fandom.com" wikiname))
(define (insert-wiki-entry wikiname)
(define dest-url
(format "https://~a.fandom.com/api.php?~a"
wikiname
(params->query '(("action" . "query")
("meta" . "siteinfo")
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("siprop" . "general|rightsinfo|statistics|namespaces")
("format" . "json")
("formatversion" . "2")))))
(define data (response-json (get dest-url)))
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(define content-nss
(sort
(for/list ([(k v) (in-hash (jp "/query/namespaces" data))]
#:do [(define id (hash-ref v 'id))]
#:when (and (id . < . 2900) ; exclude maps namespace
(hash-ref v 'content))) ; exclude non-content and talk namespaces
id)
<))
(define exists? (query-maybe-value* "select progress from wiki where wikiname = ?" wikiname))
(if (and exists? (not (sql-null? exists?)))
(query-exec* "update wiki set sitename = ?, basepage = ?, license_text = ?, license_url = ? where wikiname = ?"
(jp "/query/general/sitename" data)
(second (regexp-match #rx"/wiki/(.*)" (jp "/query/general/base" data)))
(jp "/query/rightsinfo/text" data)
(jp "/query/rightsinfo/url" data)
wikiname)
(query-exec* "insert into wiki (wikiname, progress, sitename, basepage, license_text, license_url) values (?, 0, ?, ?, ?, ?)"
wikiname
(jp "/query/general/sitename" data)
(second (regexp-match #rx"/wiki/(.*)" (jp "/query/general/base" data)))
(jp "/query/rightsinfo/text" data)
(jp "/query/rightsinfo/url" data)))
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(values (jp "/query/statistics/articles" data)
content-nss))
(define (check-style-for-images wikiname path)
(define content (file->string path))
(define urls (regexp-match* #rx"url\\(\"?'?([^)]*)'?\"?\\)" content #:match-select cadr))
(for/list ([url urls]
#:when (not (or (equal? url "")
(equal? url "'")
(string-suffix? url "\"")
(string-contains? url "/resources-ucp/")
(string-contains? url "/fonts/")
(string-contains? url "/drm_fonts/")
(string-contains? url "//db.onlinewebfonts.com/")
(string-contains? url "//bits.wikimedia.org/")
(string-contains? url "dropbox")
(string-contains? url "only=styles")
(string-contains? url "https://https://")
(regexp-match? #rx"^%20" url)
(regexp-match? #rx"^data:" url))))
(cond
[(string-prefix? url "https://") url]
[(string-prefix? url "http://") (regexp-replace #rx"http:" url "https:")]
[(string-prefix? url "//") (string-append "https:" url)]
[(string-prefix? url "/") (format "https://~a.fandom.com~a" wikiname url)]
[else (raise-user-error "While calling check-style-for-images, this URL had an unknown format and couldn't be saved:" url path)])))
(define (download-styles-for-wiki wikiname callback)
(define save-dir (build-path archive-root wikiname "styles"))
(make-directory* save-dir)
(define theme (λ (theme-name)
(cons (format "https://~a.fandom.com/wikia.php?controller=ThemeApi&method=themeVariables&variant=~a" wikiname theme-name)
(build-path save-dir (format "themeVariables-~a.css" theme-name)))))
;; (Listof (Pair url save-path))
(define styles
(list
(theme "default")
(theme "light")
(theme "dark")
(cons (format "https://~a.fandom.com/load.php?lang=en&modules=site.styles%7Cskin.fandomdesktop.styles%7Cext.fandom.PortableInfoboxFandomDesktop.css%7Cext.fandom.GlobalComponents.CommunityHeaderBackground.css%7Cext.gadget.site-styles%2Csound-styles&only=styles&skin=fandomdesktop" wikiname)
(build-path save-dir "site.css"))))
(for ([style styles]
[i (in-naturals)])
(callback i (length styles) "styles...")
(define r (get (car style)))
(define body (response-body r))
(display-to-file body (cdr style) #:exists 'replace)
;; XXX: how the HELL do I deal with @import?? would need some kind of recursion here. how will the page server know where to look up the style file to be able to serve them again? do I add another link-stylesheet tag to the main page? what about the remaining stuck @import url?
)
(callback (length styles) (length styles) "styles...")
styles)
(define (hash->save-dir wikiname hash)
(build-path archive-root wikiname "images" (substring hash 0 1) (substring hash 0 2)))
(define (image-url->values i)
;; TODO: handle case where there is multiple broken cb parameter on minecraft wiki
;; TODO: ensure it still "works" with broken &amp; on minecraft wiki
(define no-cb (regexp-replace #rx"\\cb=[0-9]+&?" i "")) ; remove cb url parameter which does nothing
(define key (regexp-replace #rx"[&?]$" no-cb "")) ; remove extra separator if necessary
(define hash (sha1 (string->bytes/utf-8 key)))
(cons key hash))
;; 1. Download list of wiki pages and store in database, if not done yet for that wiki
(define (if-necessary-download-list-of-pages wikiname callback)
(define wiki-progress (query-maybe-value* "select progress from wiki where wikiname = ?" wikiname))
;; done yet?
(unless (and (real? wiki-progress) (wiki-progress . >= . 1))
;; Count total pages
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(define-values (num-pages namespaces) (insert-wiki-entry wikiname))
;; Download the entire index of pages
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(for*/fold ([total 0])
([namespace namespaces]
[redir-filter '("nonredirects" "redirects")])
(let loop ([apcontinue ""]
[basenames null])
(cond
[apcontinue
(define url (format "https://~a.fandom.com/api.php?~a"
wikiname
(params->query `(("action" . "query")
("list" . "allpages")
("apnamespace" . ,(~a namespace))
("apfilterredir" . ,redir-filter)
("aplimit" . "500")
("apcontinue" . ,apcontinue)
("format" . "json")
("formatversion" . "2")))))
;; Download the current listing page
(define res (get url))
(define json (response-json res))
;; Content from this page
(define current-basenames
(for/list ([page (jp "/query/allpages" json)])
(title->basename (jp "/title" page))))
(when ((length current-basenames) . > . 0)
;; Report
(if (equal? redir-filter "nonredirects")
(callback (+ (length basenames) (length current-basenames) total) num-pages (last current-basenames))
(callback total num-pages (last current-basenames))))
;; Loop
(loop (jp "/continue/apcontinue" json #f) (append basenames current-basenames))]
[else
;; All done with this (loop)! Save those pages into the database
;; SQLite can have a maximum of 32766 parameters in a single query
(begin0
;; next for*/fold
(if (equal? redir-filter "nonredirects")
(+ (length basenames) total)
total) ; redirects don't count for the site statistics total
(call-with-transaction
(get-slc)
(λ ()
(for ([slice (in-slice 32760 basenames)])
(define query-template
(string-join #:before-first "insert or ignore into page (wikiname, redirect, basename, progress) values "
(make-list (length slice) "(?1, ?2, ?, 0)") ", "))
(apply query-exec* query-template wikiname (if (equal? redir-filter "redirects") 1 sql-null) slice)))))])))
;; Record that we have the complete list of pages
(query-exec* "update wiki set progress = 1 where wikiname = ?" wikiname)))
;; 2. Download each page via API and:
;; * Save API response to file
(define max-page-progress 1)
(define (save-each-page wikiname callback)
;; prepare destination folder
(define save-dir (build-path archive-root wikiname))
(make-directory* save-dir)
;; gather list of basenames to download (that aren't yet complete)
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(define basenames (query-list* "select basename from page where wikiname = ? and progress < ? and redirect is null"
wikiname max-page-progress))
;; counter of complete/incomplete basenames
(define already-done-count
(query-value* "select count(*) from page where wikiname = ? and progress = ?"
wikiname max-page-progress))
(define not-done-count
(query-value* "select count(*) from page where wikiname = ? and progress < ?"
wikiname max-page-progress))
(define total-count (+ already-done-count not-done-count))
;; set initial progress
(callback already-done-count total-count "")
;; loop through basenames and download
(for ([basename basenames]
[i (in-naturals (add1 already-done-count))])
(define name-for-query (basename->name-for-query basename))
(define dest-url
(format "https://~a.fandom.com/api.php?~a"
wikiname
(params->query `(("action" . "parse")
("page" . ,name-for-query)
("prop" . "text|headhtml|langlinks")
("formatversion" . "2")
("format" . "json")))))
(define r (get dest-url))
(define body (response-body r))
(define filename (string-append basename ".json"))
(define save-path
(cond [((string-length basename) . > . 240)
(define key (sha1 (string->bytes/latin-1 basename)))
(query-exec* "insert into special_page (wikiname, key, basename) values (?, ?, ?)"
wikiname key basename)
(build-path save-dir (string-append key ".json"))]
[#t
(build-path save-dir (string-append basename ".json"))]))
(display-to-file body save-path #:exists 'replace)
(query-exec* "update page set progress = 1 where wikiname = ? and basename = ?"
wikiname basename)
(callback i total-count basename))
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;; save redirects as well
(save-redirects wikiname callback (+ already-done-count (length basenames)) total-count)
;; saved all pages, register that fact in the database
(query-exec* "update wiki set progress = 2 where wikiname = ?" wikiname))
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;; 2.5. Download each redirect-target via API and save mapping in database
(define (save-redirects wikiname callback already-done-count total-count)
(define basenames (query-list* "select basename from page where wikiname = ? and progress < ? and redirect = 1"
wikiname max-page-progress))
;; loop through basenames, in slices of 50 (MediaWiki API max per request), and download
(for ([basename basenames]
[i (in-naturals (add1 already-done-count))])
(define dest-url
(format "https://~a.fandom.com/api.php?~a"
wikiname
(params->query `(("action" . "query")
("prop" . "links")
("titles" . ,(basename->name-for-query basename))
("format" . "json")
("formatversion" . "2")))))
(define res (get dest-url))
(define json (response-json res))
(define dest-title (jp "/query/pages/0/links/0/title" json #f))
(callback i total-count basename)
(cond
[dest-title
;; store it
(define dest-basename (title->basename dest-title))
(query-exec* "update page set progress = 1, redirect = ? where wikiname = ? and basename = ?" dest-basename wikiname basename)]
[else
;; the page just doesn't exist
(query-exec* "delete from page where wikiname = ? and basename = ?" wikiname basename)])))
;; 3. Download CSS and:
;; * Save CSS to file
;; * Record style images to database
(define (if-necessary-download-and-check-styles wikiname callback)
(define wiki-progress (query-maybe-value* "select progress from wiki where wikiname = ?" wikiname))
(unless (and (number? wiki-progress) (wiki-progress . >= . 3))
(define styles (download-styles-for-wiki wikiname callback))
(define unique-image-urls
(remove-duplicates
(map image-url->values
(flatten
(for/list ([style styles])
(check-style-for-images wikiname (cdr style)))))
#:key cdr))
(for ([pair unique-image-urls])
(query-exec* "insert or ignore into image (wikiname, url, hash, ext, source, progress) values (?, ?, ?, NULL, 1, 0)" wikiname (car pair) (cdr pair)))
(query-exec* "update wiki set progress = 3 where wikiname = ?" wikiname)))
;; 4: From downloaded pages, record URLs of image sources and inline style images to database
(define (check-json-for-images wikiname path)
(define data (with-input-from-file path (λ () (read-json))))
(define page (html->xexp (preprocess-html-wiki (jp "/parse/text" data))))
(define tree (update-tree-wiki page wikiname))
null
#;(remove-duplicates
(for/list ([element (in-producer
(query-selector
(λ (t a c)
(and (eq? t 'img)
(get-attribute 'src a)))
tree)
#f)])
(image-url->values (get-attribute 'src (bits->attributes element))))))
;; 5. Download image sources and style images according to database
(define (save-each-image wikiname callback)
(define source (hash-ref sources 'style)) ;; TODO: download entire wiki images instead?
;; gather list of basenames to download (that aren't yet complete)
(define rows (query-rows* "select url, hash from image where wikiname = ? and source <= ? and progress < 1"
wikiname source))
;; counter of complete/incomplete basenames
(define already-done-count
(query-value* "select count(*) from image where wikiname = ? and source <= ? and progress = 1"
wikiname source))
(define not-done-count
(query-value* "select count(*) from image where wikiname = ? and source <= ? and progress < 1"
wikiname source))
;; set initial progress
(callback already-done-count (+ already-done-count not-done-count) "")
;; loop through urls and download
(for ([row rows]
[i (in-naturals 1)])
;; row fragments
(define url (vector-ref row 0))
(define hash (vector-ref row 1))
;; check
#; (printf "~a -> ~a~n" url hash)
(define r (get url))
(define declared-type (response-headers-ref r 'content-type))
(define final-type (if (equal? declared-type #"application/octet-stream")
(let ([sniff-entity (message-entity (mime-analyze (response-body r)))])
(string->bytes/latin-1 (format "~a/~a" (entity-type sniff-entity) (entity-subtype sniff-entity))))
declared-type))
(define ext
(with-handlers ([exn:fail:contract? (λ _ (error 'save-each-image "no ext found for mime type `~a` in file ~a" final-type url))])
(bytes->string/latin-1 (mime-type->ext final-type))))
;; save
(define save-dir (hash->save-dir wikiname hash))
(make-directory* save-dir)
(define save-path (build-path save-dir (string-append hash "." ext)))
(define body (response-body r))
(display-to-file body save-path #:exists 'replace)
(query-exec* "update image set progress = 1, ext = ? where wikiname = ? and hash = ?"
ext wikiname hash)
(callback (+ already-done-count i) (+ already-done-count not-done-count) (string-append (substring hash 0 6) "..." ext)))
;; saved all images, register that fact in the database
(query-exec* "update wiki set progress = 4 where wikiname = ?" wikiname))
(define all-stages
(list
if-necessary-download-list-of-pages
save-each-page
if-necessary-download-and-check-styles
;; check-json-for-images
save-each-image))
(module+ test
(check-equal? (html->xexp "<img src=\"https://example.com/images?src=Blah.jpg&amp;width=150\">")
'(*TOP* (img (@ (src "https://example.com/images?src=Blah.jpg&width=150")))))
#;(download-list-of-pages "minecraft" values)
#;(save-each-page "minecraft" values)
#;(check-json-for-images "chiki" (build-path archive-root "chiki" "Fiona.json"))
#;(do-step-3 "gallowmere")
#;(save-each-image "gallowmere" (hash-ref sources 'style) (λ (a b c) (printf "~a/~a ~a~n" a b c)))
#;(for ([wikiname (query-list* "select wikiname from wiki")])
(println wikiname)
(insert-wiki-entry wikiname))
#;(for ([wikiname (query-list* "select wikiname from wiki")])
(println wikiname)
(do-step-3 wikiname)
(save-each-image wikiname (hash-ref sources 'style) (λ (a b c) (printf "~a/~a ~a~n" a b c)))))
; (for ([stage all-stages]) (stage "create" (λ (a b c) (printf "~a/~a ~a~n" a b c))))