Mercurial > prosody-modules
changeset 4426:3fe2c264aac4
mod_pubsub_summary: Mangle HTML payloads in Atom/RSS feeds
This module is meant for use with mod_pubsub_feeds and tries to improve
on mod_pubsub's built-in Atom summary generator.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Thu, 04 Feb 2021 01:12:41 +0100 |
| parents | b3e0295e14a3 |
| children | c402b273f2e3 |
| files | mod_pubsub_summary/mod_pubsub_summary.lua |
| diffstat | 1 files changed, 42 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_pubsub_summary/mod_pubsub_summary.lua Thu Feb 04 01:12:41 2021 +0100 @@ -0,0 +1,42 @@ +-- No, not trying to parse HTML here. It's an illusion. Just trying to read RSS feeds. +-- +-- Compose a textual representation of Atom payloads +module:hook("pubsub-summary/http://www.w3.org/2005/Atom", function (event) + local payload = event.payload; + local title = payload:get_child_text("title"); + local content_tag = payload:get_child("content") or payload:get_child("summary"); + local content = content_tag:get_text(); + if content_tag.attr.type == "html" then + content = content:gsub("\n*<p[^>]*>\n*(.-)\n*</p>\n*", "%1\n\n"); + content = content:gsub("<li>(.-)</li>\n", "* %1\n"); + content = content:gsub("<a[^>]*href=[\"'](.-)[\"'][^>]*>(.-)</a>", "%2 <%1>"); + content = content:gsub("<b>(.-)</b>", "*%1*"); + content = content:gsub("<strong>(.-)</strong>", "*%1*"); + content = content:gsub("<em>(.-)</em>", "*%1*"); + content = content:gsub("<i>(.-)</i>", "*%1*"); + content = content:gsub("<img[^>]*src=[\"'](.-)[\"'][^>]*>", " %1 "); -- TODO alt= would have been nice to grab + content = content:gsub("<br[^>]*>", "\n"); + content = content:gsub("<[^>]+>", ""); + content = content:gsub("^%s*", ""):gsub("%s*$", ""); + content = content:gsub("\n\n\n+", "\n\n"); + content = content:gsub("&(%w+);", { + apos = "'"; + quot = '"'; + lt = "<"; + gt = ">"; + amp = "&"; + nbsp = utf8 and utf8.char(0xa0) or " "; + }); + end + local link = payload:get_child("link"); + local summary; + if title and content then + summary = title .. "\n\n" .. content; + elseif title or content then + summary = content or title; + end + if link and link.attr.href and link.attr.href ~= content then + summary = (summary and summary .. "\n" or "") .. link.attr.href; + end + return summary; +end, 1);