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Merge pull request #51 from PerimeterX/dev-first-party
first party
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| require 'perimeterx/internal/perimeter_x_context' | ||
| module PxModule | ||
| class FirstPartyManager | ||
| def initialize(px_config, px_http_client, logger) | ||
| @px_config = px_config | ||
| @app_id = px_config[:app_id] | ||
| @px_http_client = px_http_client | ||
| @logger = logger | ||
| @from = [ | ||
| "/#{@app_id[2..-1]}/init.js", | ||
| "/#{@app_id[2..-1]}/captcha", | ||
| "/#{@app_id[2..-1]}/xhr" | ||
| ] | ||
| end | ||
|
|
||
| def send_first_party_request(req) | ||
| uri = URI.parse(req.original_url) | ||
| url_path = uri.path | ||
|
|
||
| headers = extract_headers(req) | ||
| headers["x-px-first-party"] = "1" | ||
| headers["x-px-enforcer-true-ip"] = PerimeterXContext.extract_ip(req, @px_config) | ||
|
|
||
| if url_path.start_with?(@from[0]) | ||
| return get_client(req, uri, headers) | ||
| elsif url_path.start_with?(@from[1]) | ||
| return get_captcha(req, uri, headers) | ||
| elsif url_path.start_with?(@from[2]) | ||
| return send_xhr(req, uri, headers) | ||
| else | ||
| return nil | ||
| end | ||
| end | ||
|
|
||
| def get_client(req, uri, headers) | ||
| @logger.debug("FirstPartyManager[get_client]") | ||
|
|
||
| # define host | ||
| headers["host"] = PxModule::CLIENT_HOST | ||
|
|
||
| # define request url | ||
| url = "#{uri.scheme}://#{PxModule::CLIENT_HOST}/#{@app_id}/main.min.js" | ||
|
|
||
| # send request | ||
| return @px_http_client.get(url, headers) | ||
| end | ||
|
|
||
| def get_captcha(req, uri, headers) | ||
| @logger.debug("FirstPartyManager[get_captcha]") | ||
|
|
||
| # define host | ||
| headers["host"] = PxModule::CAPTCHA_HOST | ||
|
|
||
| # define request url | ||
| path_and_query = uri.request_uri | ||
| uri_suffix = path_and_query.sub "/#{@app_id[2..-1]}/captcha", "" | ||
| url = "#{uri.scheme}://#{PxModule::CAPTCHA_HOST}#{uri_suffix}" | ||
|
|
||
| # send request | ||
| return @px_http_client.get(url, headers) | ||
| end | ||
|
|
||
| def send_xhr(req, uri, headers) | ||
| @logger.debug("FirstPartyManager[send_xhr]") | ||
|
|
||
| # handle vid cookies | ||
| if !req.cookies.nil? | ||
| if req.cookies.key?("_pxvid") | ||
| vid = PerimeterXContext.force_utf8(req.cookies["_pxvid"]) | ||
| if headers.key?('cookie') | ||
| headers['cookie'] += "; pxvid=#{vid}"; | ||
| else | ||
| headers['cookie'] = "pxvid=#{vid}"; | ||
| end | ||
| end | ||
| end | ||
|
|
||
| # define host | ||
| headers["host"] = "collector-#{@app_id.downcase}.perimeterx.net" | ||
|
|
||
| # define request url | ||
| path_and_query = uri.request_uri | ||
| path_suffix = path_and_query.sub "/#{@app_id[2..-1]}/xhr", "" | ||
| url = "#{uri.scheme}://collector-#{@app_id.downcase}.perimeterx.net#{path_suffix}" | ||
|
|
||
| # send request | ||
| return @px_http_client.post_xhr(url, req.body.string, headers) | ||
| end | ||
|
|
||
| def extract_headers(req) | ||
| headers = Hash.new | ||
| req.headers.each do |k, v| | ||
| if (k.start_with? 'HTTP_') && (!@px_config[:sensitive_headers].include? k) | ||
| header = k.to_s.gsub('HTTP_', '') | ||
| header = header.gsub('_', '-').downcase | ||
| headers[header] = PerimeterXContext.force_utf8(v) | ||
| end | ||
| end | ||
| return headers | ||
| end | ||
|
|
||
| # -1 - not first party request | ||
| # 0 - /init.js | ||
| # 1 - /captcha | ||
| # 2 - /xhr | ||
| def get_first_party_request_type(req) | ||
| url_path = URI.parse(req.original_url).path | ||
| @from.each_with_index do |val,index| | ||
| if url_path.start_with?(val) | ||
| return index | ||
| end | ||
| end | ||
| return -1 | ||
| end | ||
|
|
||
| def is_first_party_request(req) | ||
| return get_first_party_request_type(req) != -1 | ||
| end | ||
|
|
||
| def get_response_content_type(req) | ||
| return get_first_party_request_type(req) == 2 ? :json : :js | ||
| end | ||
| end | ||
| end |
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