author | Kim Alvefur <zash@zash.se> |
Wed, 01 Jan 2020 10:11:08 +0100 | |
changeset 3797 | 0d3926e49b55 |
parent 3508 | 9ef5b229f73e |
child 4525 | f7381268a597 |
permissions | -rw-r--r-- |
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mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
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module:depends("http"); |
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mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
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|
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local st = require "util.stanza"; |
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local json = require "util.json"; |
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local xml = require "util.xml"; |
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local uuid_generate = require "util.uuid".generate; |
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local timestamp_generate = require "util.datetime".datetime; |
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local hashes = require "util.hashes"; |
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local from_hex = require "util.hex".from; |
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local hmacs = { |
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sha1 = hashes.hmac_sha1; |
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sha256 = hashes.hmac_sha256; |
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sha384 = hashes.hmac_sha384; |
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sha512 = hashes.hmac_sha512; |
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}; |
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|
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local pubsub_service = module:depends("pubsub").service; |
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local error_mapping = { |
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["forbidden"] = 403; |
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["item-not-found"] = 404; |
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["internal-server-error"] = 500; |
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["conflict"] = 409; |
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}; |
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local function publish_payload(node, actor, item_id, payload) |
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local post_item = st.stanza("item", { xmlns = "http://jabber.org/protocol/pubsub", id = item_id, }) |
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:add_child(payload); |
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local ok, err = pubsub_service:publish(node, actor, item_id, post_item); |
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module:log("debug", ":publish(%q, true, %q, %s) -> %q", node, item_id, payload:top_tag(), err or ""); |
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if not ok then |
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return error_mapping[err] or 500; |
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end |
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return 202; |
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end |
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local function handle_json(node, actor, data) |
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local parsed, err = json.decode(data); |
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if not parsed then |
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return { status_code = 400; body = tostring(err); } |
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end |
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if type(parsed) ~= "table" then |
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return { status_code = 400; body = "object or array expected"; }; |
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end |
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local wrapper = st.stanza("json", { xmlns="urn:xmpp:json:0" }):text(data); |
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return publish_payload(node, actor, type(parsed.id) == "string" and parsed.id or "current", wrapper); |
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end |
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local function publish_atom(node, actor, feed) |
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for entry in feed:childtags("entry") do |
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local item_id = entry:get_child_text("id"); |
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if not item_id then |
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item_id = uuid_generate(); |
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entry:tag("id"):text(item_id):up(); |
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end |
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if not entry:get_child_text("published") then |
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entry:tag("published"):text(timestamp_generate()):up(); |
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end |
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local resp = publish_payload(node, actor, item_id, entry); |
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if resp ~= 202 then return resp; end |
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end |
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return 202; |
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end |
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|
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local function handle_xml(node, actor, payload) |
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local xmlpayload, err = xml.parse(payload); |
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if not xmlpayload then |
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module:log("debug", "XML parse error: %s\n%q", err, payload); |
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return { status_code = 400, body = tostring(err) }; |
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end |
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if xmlpayload.attr.xmlns == "http://www.w3.org/2005/Atom" and xmlpayload.name == "feed" then |
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return publish_atom(node, actor, xmlpayload); |
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else |
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return publish_payload(node, actor, "current", xmlpayload); |
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end |
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end |
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local actor_source = module:get_option_string("pubsub_post_actor"); -- COMPAT |
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local default_secret = module:get_option_string("pubsub_post_default_secret"); |
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local actor_secrets = module:get_option("pubsub_post_secrets"); |
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local actors = module:get_option("pubsub_post_actors"); |
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local default_actor = module:get_option_string("pubsub_post_default_actor"); |
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if not default_actor and actor_source == "superuser" then |
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default_actor = true; |
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end |
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local function verify_signature(secret, body, signature) |
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if not signature then return false; end |
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local algo, digest = signature:match("^([^=]+)=(%x+)"); |
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if not algo then return false; end |
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local hmac = hmacs[algo]; |
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if not algo then return false; end |
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return hmac(secret, body) == from_hex(digest); |
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end |
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function handle_POST(event, path) |
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local request = event.request; |
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local content_type = request.headers.content_type or "application/octet-stream"; |
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local actor = actors and actors[path] or default_actor or request.ip; |
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local secret = actor_secrets and actor_secrets[path] or default_secret; |
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module:log("debug", "Handling POST to node %q by %q with %q: \n%s\n", path, actor, content_type, request.body); |
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105 |
if secret and not verify_signature(secret, request.body, request.headers.x_hub_signature) then |
3508
9ef5b229f73e
mod_pubsub_post: Make debug messages more informative
Kim Alvefur <zash@zash.se>
parents:
3507
diff
changeset
|
106 |
module:log("debug", "Signature validation failed"); |
3505
1df139b157fb
mod_pubsub_post: Add support for WebSub authentication
Kim Alvefur <zash@zash.se>
parents:
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diff
changeset
|
107 |
return 401; |
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mod_pubsub_post: Add support for WebSub authentication
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parents:
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diff
changeset
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108 |
end |
1df139b157fb
mod_pubsub_post: Add support for WebSub authentication
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parents:
3259
diff
changeset
|
109 |
|
3259
64d1dfbd1740
mod_pubsub_post: Ensure actor is non-nil (catch inability to determine IP or simliar)
Kim Alvefur <zash@zash.se>
parents:
3258
diff
changeset
|
110 |
if not actor then |
64d1dfbd1740
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parents:
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diff
changeset
|
111 |
return 401; |
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parents:
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diff
changeset
|
112 |
end |
64d1dfbd1740
mod_pubsub_post: Ensure actor is non-nil (catch inability to determine IP or simliar)
Kim Alvefur <zash@zash.se>
parents:
3258
diff
changeset
|
113 |
|
3018
72dbc9b66de8
mod_pubsub_post: Change to support arbitrary XML payloads
Kim Alvefur <zash@zash.se>
parents:
3017
diff
changeset
|
114 |
if content_type == "application/xml" or content_type:sub(-4) == "+xml" then |
3021
8e48c0b233e0
mod_pubsub_post: Factor out the 'actor' into an argument
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parents:
3020
diff
changeset
|
115 |
return handle_xml(path, actor, request.body); |
3020
3f4e2340bfdc
mod_pubsub_post: Add support for publishing arbitrary JSON
Kim Alvefur <zash@zash.se>
parents:
3019
diff
changeset
|
116 |
elseif content_type == "application/json" or content_type:sub(-5) == "+json" then |
3021
8e48c0b233e0
mod_pubsub_post: Factor out the 'actor' into an argument
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parents:
3020
diff
changeset
|
117 |
return handle_json(path, actor, request.body); |
3018
72dbc9b66de8
mod_pubsub_post: Change to support arbitrary XML payloads
Kim Alvefur <zash@zash.se>
parents:
3017
diff
changeset
|
118 |
end |
72dbc9b66de8
mod_pubsub_post: Change to support arbitrary XML payloads
Kim Alvefur <zash@zash.se>
parents:
3017
diff
changeset
|
119 |
|
72dbc9b66de8
mod_pubsub_post: Change to support arbitrary XML payloads
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parents:
3017
diff
changeset
|
120 |
module:log("debug", "Unsupported content-type: %q", content_type); |
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mod_pubsub_post: Change to support arbitrary XML payloads
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parents:
3017
diff
changeset
|
121 |
return 415; |
1623
43c54a27bab2
mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
122 |
end |
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Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
123 |
|
43c54a27bab2
mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
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parents:
diff
changeset
|
124 |
module:provides("http", { |
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parents:
diff
changeset
|
125 |
route = { |
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parents:
diff
changeset
|
126 |
["POST /*"] = handle_POST; |
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parents:
diff
changeset
|
127 |
}; |
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parents:
diff
changeset
|
128 |
}); |
43c54a27bab2
mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
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parents:
diff
changeset
|
129 |
|
43c54a27bab2
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parents:
diff
changeset
|
130 |
function module.load() |
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parents:
diff
changeset
|
131 |
module:log("debug", "Loaded at %s", module:http_url()); |
43c54a27bab2
mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
132 |
end |