mod_log_http: Add new module for logging outgoing HTTP request

Fri, 21 Apr 2017 16:46:09 +0100

author
Matthew Wild <mwild1@gmail.com>
date
Fri, 21 Apr 2017 16:46:09 +0100
changeset 2700
7a5dae85f26f
parent 2699
dae655657a92
child 2702
caabb980d1d8
child 2706
3e97dae28215

mod_log_http: Add new module for logging outgoing HTTP request

mod_log_http/README.markdown file | annotate | diff | comparison | revisions
mod_log_http/mod_log_http.lua file | annotate | diff | comparison | revisions
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_log_http/README.markdown	Fri Apr 21 16:46:09 2017 +0100
@@ -0,0 +1,22 @@
+---
+summary: HTTP request logging
+...
+
+Introduction
+============
+
+This module logs *outgoing* requests that go via the internal net.http API.
+
+Output format liable to change.
+
+Configuration
+=============
+
+One option is required, set `log_http_file` to the file path you would like to log to.
+
+Compatibility
+=============
+
+  ----- -------
+  0.10   Works (requires 375cf924fce1 or later)
+  ----- -------
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_log_http/mod_log_http.lua	Fri Apr 21 16:46:09 2017 +0100
@@ -0,0 +1,78 @@
+module:set_global();
+
+local http = require "net.http";
+local codes = require "net.http.codes";
+local json = require "util.json";
+
+local log = assert(io.open(assert(module:get_option_string("log_http_file"), "Please supply log_http_file in the config"), "a+"));
+
+local function append_request(id, req)
+	local headers = {};
+	for k, v in pairs(req.headers) do
+		table.insert(headers, { name = k, value = v });
+	end
+	local queryString = {};
+	if req.query then
+		for _, pair in ipairs(http.formdecode(req.query)) do
+			table.insert(queryString, pair);
+		end
+	end
+	log:write("<<<", json.encode({
+		id = id;
+		type = "request";
+		method = req.method;
+		url = req.url;
+		httpVersion = "HTTP/1.1";
+		cookies = {};
+		headers = headers;
+		queryString = queryString;
+		postData = req.body and {
+			mimeType = req.headers["Content-Type"];
+			text = req.body;
+		} or nil;
+		headersSize = -1;
+		bodySize = -1;
+	}), "\n");
+end
+
+local function append_response(id, resp)
+	local headers = {};
+	for k, v in pairs(resp.headers) do
+		table.insert(headers, { name = k, value = v });
+	end
+	log:write(">>>", json.encode({
+		id = id;
+		type = "response";
+		status = resp.code;
+		statusText = codes[resp.code];
+		httpVersion = resp.httpversion;
+		cookies = {};
+		headers = headers;
+		content = resp.body and {
+			size = #resp.body;
+			mimeType = resp.headers.content_type;
+			text = resp.body;
+		} or nil;
+		headersSize = -1;
+		bodySize = -1;
+	}), "\n");
+end
+
+module:hook_object_event(http.events, "request", function (event)
+	module:log("warn", "Request to %s!", event.url);
+	append_request(event.request.id, event.request);
+end);
+
+module:hook_object_event(http.events, "request-connection-error", function (event)
+	module:log("warn", "Failed to make request to %s!", event.url);
+end);
+
+module:hook_object_event(http.events, "response", function (event)
+	module:log("warn", "Received response %d from %s!", event.code, event.url);
+	for k,v in pairs(event.response) do print("=====", k, v) end
+	append_response(event.request.id, event.response);
+end);
+
+function module.unload()
+	log:close();
+end

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