author | Kim Alvefur <zash@zash.se> |
Wed, 03 Mar 2021 11:43:38 +0100 | |
changeset 4494 | cf2bdb2aaa57 |
parent 3088 | 5b4e7db5943c |
child 5724 | 0f103a6e9ba4 |
permissions | -rw-r--r-- |
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mod_http_avatar: Add a module to serve vCard-temp avatars over HTTP.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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-- Prosody IM |
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-- Copyright (C) 2018 Emmanuel Gil Peyrot |
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-- |
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-- This project is MIT/X11 licensed. Please see the |
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-- COPYING file in the source package for more information. |
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local base64 = require"util.encodings".base64; |
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local sha1 = require"util.hashes".sha1; |
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local st = require"util.stanza"; |
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module:depends"http"; |
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local vcard_storage = module:open_store"vcard"; |
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local default_avatar = [[<svg xmlns='http://www.w3.org/2000/svg' version='1.1' viewBox='0 0 150 150'> |
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<rect width='150' height='150' fill='#888' stroke-width='1' stroke='#000'/> |
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<text x='75' y='100' text-anchor='middle' font-size='100'>?</text> |
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</svg>]]; |
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local function get_avatar(event, path) |
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local request, response = event.request, event.response; |
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local photo_type, binval; |
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local vcard, err = vcard_storage:get(path); |
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if vcard then |
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vcard = st.deserialize(vcard); |
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local photo = vcard:get_child("PHOTO", "vcard-temp"); |
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if photo then |
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photo_type = photo:get_child_text("TYPE", "vcard-temp"); |
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binval = photo:get_child_text("BINVAL", "vcard-temp"); |
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end |
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end |
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if not photo_type or not binval then |
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response.status_code = 404; |
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response.headers.content_type = "image/svg+xml"; |
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return default_avatar; |
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end |
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local avatar = base64.decode(binval); |
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local hash = sha1(avatar, true); |
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if request.headers.if_none_match == hash then |
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return 304; |
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end |
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response.headers.content_type = photo_type; |
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response.headers.etag = hash; |
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return avatar; |
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end |
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module:provides("http", { |
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route = { |
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["GET /*"] = get_avatar; |
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}; |
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}); |