bug#70907: [PATCH] Render using Haunt; per dthompson's recommendation.

[Felix Lechner via Bug-mumi via "Bug reports for GNU Guix Mumi." <bug-mumi@gnu.org>]

Per a conversation with David on IRC, it's better to serve UTF-8
directly instead of transcoding to HTML entities.  The new code in
Haunt, which David authored and from where the previous code came,
does just that.

Please add 'haunt' as an "input" to the Mumi package definition in
Guix after accepting this commit.

A preview of this code is live at patchwise.org.
---
 Makefile.am         |   1 -
 mumi/web/render.scm |   2 +-
 mumi/web/sxml.scm   | 370 --------------------------------------------
 3 files changed, 1 insertion(+), 372 deletions(-)
 delete mode 100644 mumi/web/sxml.scm

diff --git a/Makefile.am b/Makefile.am
index 3e57e63..ae279df 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -40,7 +40,6 @@ SOURCES =							\
   mumi/web/server.scm				\
   mumi/web/render.scm				\
   mumi/web/controller.scm			\
-  mumi/web/sxml.scm					\
   mumi/web/util.scm					\
   mumi/web/graphql.scm				\
   mumi/web/view/html.scm			\
diff --git a/mumi/web/render.scm b/mumi/web/render.scm
index ad3ae0e..231e892 100644
--- a/mumi/web/render.scm
+++ b/mumi/web/render.scm
@@ -33,9 +33,9 @@
   #:use-module (web response)
   #:use-module (web uri)
   #:use-module (webutils multipart)
+  #:use-module (haunt html)
   #:use-module (json)
   #:use-module (mumi config)
-  #:use-module (mumi web sxml)
   #:use-module (mumi web util)
   #:export (render-static-asset
             render-html
diff --git a/mumi/web/sxml.scm b/mumi/web/sxml.scm
deleted file mode 100644
index a3d1056..0000000
--- a/mumi/web/sxml.scm
+++ /dev/null
@@ -1,370 +0,0 @@
-;;; mumi -- Mediocre, uh, mail interface
-;;; Copyright © 2016, 2017  Ricardo Wurmus <rekado@elephly.net>
-;;; Copyright © 2015  David Thompson <davet@gnu.org>
-;;;
-;;; This program is free software: you can redistribute it and/or
-;;; modify it under the terms of the GNU Affero General Public License
-;;; as published by the Free Software Foundation, either version 3 of
-;;; the License, or (at your option) any later version.
-;;;
-;;; 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
-;;; Affero General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU Affero General Public
-;;; License along with this program.  If not, see
-;;; <http://www.gnu.org/licenses/>.
-
-;;; Commentary:
-;;
-;; SXML to HTML conversion.
-;;
-;;; Code:
-
-(define-module (mumi web sxml)
-  #:use-module (sxml simple)
-  #:use-module (srfi srfi-26)
-  #:use-module (ice-9 match)
-  #:use-module (ice-9 format)
-  #:use-module (ice-9 hash-table)
-  #:export (sxml->html))
-
-(define %self-closing-tags
-  '(area
-    base
-    br
-    col
-    command
-    embed
-    hr
-    img
-    input
-    keygen
-    link
-    meta
-    param
-    source
-    track
-    wbr))
-
-(define (self-closing-tag? tag)
-  "Return #t if TAG is self-closing."
-  (pair? (memq tag %self-closing-tags)))
-
-(define %escape-chars
-  (alist->hash-table
-   '((#\" . "quot")
-     (#\& . "amp")
-     (#\' . "apos")
-     (#\< . "lt")
-     (#\> . "gt")
-     (#\¡ . "iexcl")
-     (#\¢ . "cent")
-     (#\£ . "pound")
-     (#\¤ . "curren")
-     (#\¥ . "yen")
-     (#\¦ . "brvbar")
-     (#\§ . "sect")
-     (#\¨ . "uml")
-     (#\© . "copy")
-     (#\ª . "ordf")
-     (#\« . "laquo")
-     (#\¬ . "not")
-     (#\® . "reg")
-     (#\¯ . "macr")
-     (#\° . "deg")
-     (#\± . "plusmn")
-     (#\² . "sup2")
-     (#\³ . "sup3")
-     (#\´ . "acute")
-     (#\µ . "micro")
-     (#\¶ . "para")
-     (#\· . "middot")
-     (#\¸ . "cedil")
-     (#\¹ . "sup1")
-     (#\º . "ordm")
-     (#\» . "raquo")
-     (#\¼ . "frac14")
-     (#\½ . "frac12")
-     (#\¾ . "frac34")
-     (#\¿ . "iquest")
-     (#\À . "Agrave")
-     (#\Á . "Aacute")
-     (#\Â . "Acirc")
-     (#\Ã . "Atilde")
-     (#\Ä . "Auml")
-     (#\Å . "Aring")
-     (#\Æ . "AElig")
-     (#\Ç . "Ccedil")
-     (#\È . "Egrave")
-     (#\É . "Eacute")
-     (#\Ê . "Ecirc")
-     (#\Ë . "Euml")
-     (#\Ì . "Igrave")
-     (#\Í . "Iacute")
-     (#\Î . "Icirc")
-     (#\Ï . "Iuml")
-     (#\Ð . "ETH")
-     (#\Ñ . "Ntilde")
-     (#\Ò . "Ograve")
-     (#\Ó . "Oacute")
-     (#\Ô . "Ocirc")
-     (#\Õ . "Otilde")
-     (#\Ö . "Ouml")
-     (#\× . "times")
-     (#\Ø . "Oslash")
-     (#\Ù . "Ugrave")
-     (#\Ú . "Uacute")
-     (#\Û . "Ucirc")
-     (#\Ü . "Uuml")
-     (#\Ý . "Yacute")
-     (#\Þ . "THORN")
-     (#\ß . "szlig")
-     (#\à . "agrave")
-     (#\á . "aacute")
-     (#\â . "acirc")
-     (#\ã . "atilde")
-     (#\ä . "auml")
-     (#\å . "aring")
-     (#\æ . "aelig")
-     (#\ç . "ccedil")
-     (#\è . "egrave")
-     (#\é . "eacute")
-     (#\ê . "ecirc")
-     (#\ë . "euml")
-     (#\ì . "igrave")
-     (#\í . "iacute")
-     (#\î . "icirc")
-     (#\ï . "iuml")
-     (#\ð . "eth")
-     (#\ñ . "ntilde")
-     (#\ò . "ograve")
-     (#\ó . "oacute")
-     (#\ô . "ocirc")
-     (#\õ . "otilde")
-     (#\ö . "ouml")
-     (#\÷ . "divide")
-     (#\ø . "oslash")
-     (#\ù . "ugrave")
-     (#\ú . "uacute")
-     (#\û . "ucirc")
-     (#\ü . "uuml")
-     (#\ý . "yacute")
-     (#\þ . "thorn")
-     (#\ÿ . "yuml")
-     (#\Π. "OElig")
-     (#\œ . "oelig")
-     (#\Š . "Scaron")
-     (#\š . "scaron")
-     (#\Ÿ . "Yuml")
-     (#\ƒ . "fnof")
-     (#\ˆ . "circ")
-     (#\˜ . "tilde")
-     (#\Α . "Alpha")
-     (#\Β . "Beta")
-     (#\Γ . "Gamma")
-     (#\Δ . "Delta")
-     (#\Ε . "Epsilon")
-     (#\Ζ . "Zeta")
-     (#\Η . "Eta")
-     (#\Θ . "Theta")
-     (#\Ι . "Iota")
-     (#\Κ . "Kappa")
-     (#\Λ . "Lambda")
-     (#\Μ . "Mu")
-     (#\Ν . "Nu")
-     (#\Ξ . "Xi")
-     (#\Ο . "Omicron")
-     (#\Π . "Pi")
-     (#\Ρ . "Rho")
-     (#\Σ . "Sigma")
-     (#\Τ . "Tau")
-     (#\Υ . "Upsilon")
-     (#\Φ . "Phi")
-     (#\Χ . "Chi")
-     (#\Ψ . "Psi")
-     (#\Ω . "Omega")
-     (#\α . "alpha")
-     (#\β . "beta")
-     (#\γ . "gamma")
-     (#\δ . "delta")
-     (#\ε . "epsilon")
-     (#\ζ . "zeta")
-     (#\η . "eta")
-     (#\θ . "theta")
-     (#\ι . "iota")
-     (#\κ . "kappa")
-     (#\λ . "lambda")
-     (#\μ . "mu")
-     (#\ν . "nu")
-     (#\ξ . "xi")
-     (#\ο . "omicron")
-     (#\π . "pi")
-     (#\ρ . "rho")
-     (#\ς . "sigmaf")
-     (#\σ . "sigma")
-     (#\τ . "tau")
-     (#\υ . "upsilon")
-     (#\φ . "phi")
-     (#\χ . "chi")
-     (#\ψ . "psi")
-     (#\ω . "omega")
-     (#\ϑ . "thetasym")
-     (#\ϒ . "upsih")
-     (#\ϖ . "piv")
-     (#\  . "ensp")
-     (#\  . "emsp")
-     (#\  . "thinsp")
-     (#\– . "ndash")
-     (#\— . "mdash")
-     (#\‘ . "lsquo")
-     (#\’ . "rsquo")
-     (#\‚ . "sbquo")
-     (#\“ . "ldquo")
-     (#\” . "rdquo")
-     (#\„ . "bdquo")
-     (#\† . "dagger")
-     (#\‡ . "Dagger")
-     (#\• . "bull")
-     (#\… . "hellip")
-     (#\‰ . "permil")
-     (#\′ . "prime")
-     (#\″ . "Prime")
-     (#\‹ . "lsaquo")
-     (#\› . "rsaquo")
-     (#\‾ . "oline")
-     (#\⁄ . "frasl")
-     (#\€ . "euro")
-     (#\ℑ . "image")
-     (#\℘ . "weierp")
-     (#\ℜ . "real")
-     (#\™ . "trade")
-     (#\ℵ . "alefsym")
-     (#\← . "larr")
-     (#\↑ . "uarr")
-     (#\→ . "rarr")
-     (#\↓ . "darr")
-     (#\↔ . "harr")
-     (#\↵ . "crarr")
-     (#\⇐ . "lArr")
-     (#\⇑ . "uArr")
-     (#\⇒ . "rArr")
-     (#\⇓ . "dArr")
-     (#\⇔ . "hArr")
-     (#\∀ . "forall")
-     (#\∂ . "part")
-     (#\∃ . "exist")
-     (#\∅ . "empty")
-     (#\∇ . "nabla")
-     (#\∈ . "isin")
-     (#\∉ . "notin")
-     (#\∋ . "ni")
-     (#\∏ . "prod")
-     (#\∑ . "sum")
-     (#\− . "minus")
-     (#\∗ . "lowast")
-     (#\√ . "radic")
-     (#\∝ . "prop")
-     (#\∞ . "infin")
-     (#\∠ . "ang")
-     (#\∧ . "and")
-     (#\∨ . "or")
-     (#\∩ . "cap")
-     (#\∪ . "cup")
-     (#\∫ . "int")
-     (#\∴ . "there4")
-     (#\∼ . "sim")
-     (#\≅ . "cong")
-     (#\≈ . "asymp")
-     (#\≠ . "ne")
-     (#\≡ . "equiv")
-     (#\≤ . "le")
-     (#\≥ . "ge")
-     (#\⊂ . "sub")
-     (#\⊃ . "sup")
-     (#\⊄ . "nsub")
-     (#\⊆ . "sube")
-     (#\⊇ . "supe")
-     (#\⊕ . "oplus")
-     (#\⊗ . "otimes")
-     (#\⊥ . "perp")
-     (#\⋅ . "sdot")
-     (#\⋮ . "vellip")
-     (#\⌈ . "lceil")
-     (#\⌉ . "rceil")
-     (#\⌊ . "lfloor")
-     (#\⌋ . "rfloor")
-     (#\〈 . "lang")
-     (#\〉 . "rang")
-     (#\◊ . "loz")
-     (#\♠ . "spades")
-     (#\♣ . "clubs")
-     (#\♥ . "hearts")
-     (#\♦ . "diams"))))
-
-(define (string->escaped-html s port)
-  "Write the HTML escaped form of S to PORT."
-  (define (escape c)
-    (let ((escaped (hash-ref %escape-chars c)))
-      (if escaped
-          (format port "&~a;" escaped)
-          (display c port))))
-  (string-for-each escape s))
-
-(define (object->escaped-html obj port)
-  "Write the HTML escaped form of OBJ to PORT."
-  (string->escaped-html
-   (call-with-output-string (cut display obj <>))
-   port))
-
-(define (attribute-value->html value port)
-  "Write the HTML escaped form of VALUE to PORT."
-  (if (string? value)
-      (string->escaped-html value port)
-      (object->escaped-html value port)))
-
-(define (attribute->html attr value port)
-  "Write ATTR and VALUE to PORT."
-  (format port "~a=\"" attr)
-  (attribute-value->html value port)
-  (display #\" port))
-
-(define (element->html tag attrs body port)
-  "Write the HTML TAG to PORT, where TAG has the attributes in the
-list ATTRS and the child nodes in BODY."
-  (format port "<~a" tag)
-  (for-each (match-lambda
-             ((attr value)
-              (display #\space port)
-              (attribute->html attr value port)))
-            attrs)
-  (if (and (null? body) (self-closing-tag? tag))
-      (display " />" port)
-      (begin
-        (display #\> port)
-        (for-each (cut sxml->html <> port) body)
-        (format port "</~a>" tag))))
-
-(define (doctype->html doctype port)
-  (format port "<!DOCTYPE ~a>" doctype))
-
-(define* (sxml->html tree #:optional (port (current-output-port)))
-  "Write the serialized HTML form of TREE to PORT."
-  (match tree
-    (() *unspecified*)
-    (('doctype type)
-     (doctype->html type port))
-    ;; Unescaped, raw HTML output
-    (('raw html)
-     (display html port))
-    (((? symbol? tag) ('@ attrs ...) body ...)
-     (element->html tag attrs body port))
-    (((? symbol? tag) body ...)
-     (element->html tag '() body port))
-    ((nodes ...)
-     (for-each (cut sxml->html <> port) nodes))
-    ((? string? text)
-     (string->escaped-html text port))
-    ;; Render arbitrary Scheme objects, too.
-    (obj (object->escaped-html obj port))))

base-commit: 99416ed5c7d950eaf54d52023a2efd975bccac92
-- 
2.41.0