我们尝试使用此文档 https://sendgrid.com/docs/ui/account-and-settings/custom-ssl-configurations/设置带有自定义 SSL 的品牌链接。
我们遵循它，现在我们有一个带有证书的代理，它被重定向到 sendgrid.net。
支持人员告诉我们，他们的测试显示"失败：我们没有从测试'https'点击跟踪链接收到 200 响应。并告诉我们不支持代理上的证书通配符。
我不明白通配符的原因，代理发送的不是200，因为 sendgrid.net 发送的是404
所以我不明白该怎么办。
我们使用nginx和这个例子来实现我们的代理： https://gist.github.com/jjhiew/cbbd26da313fc550467e303a6c6f8177
感谢您的提醒。我们确实可以工作，但我忘了在这里发布它。一般的想法是 将品牌点击请求转到我们自己的服务器，该服务器具有 TLS 认证。即 link.mysite.com 转到我们自己的服务器而不是 SendGrid。我们的服务器接受这些请求，发出相同的请求 请求发送网格。无论SendGrid回复我们的服务器，我们都会发送回浏览器。
我不确定，但我认为SendGrid支持人员不得不拨动一些开关。但这可能是错误的。我记得我和他们谈过，我记得他们不理解这种代理情况。我终于找到了这样做的人，还是在没有他们的情况下让它工作，我不确定。
以下是我们为此使用的代码(Ruby on Rails(：
# Allow SendGrid Click Tracking to use HTTPS
#
# SendGrid click tracking uses the host 'link.example.com' but HSTS requires that host
# respond to HTTPS. However SendGrid does not have our certificate. So instead point
# link.example.com to this proxy, and we make the same request to sendgrid.
#
# see: https://sendgrid.com/docs/ui/account-and-settings/custom-ssl-configurations/
#
# Configuring SendGrid, Heroku, and DNSimple for Click Tracking and unsubscribes
# ------------------------------------------------------------------------------
# Sendgrid > Sender Authentication > Link Branding
# Create branded link for example.com
# Advanced Settings > Custom link subdomain: link
#
# DNS > make the CNAME records they mention
# Sendgrid >
# verify branded links so they are activated.
# Make link the default.
#
# Heroku > configure subdomain for link.example.com
# DNS > change CNAME record so link.example.com points to Heroku, e.g. blah.blah.herokudns.com
#
# Test:
# Unsubscribe links that start with link.example.com/___ should work now.
#
# Sendgrid > Tracking > Click Tracking > ON
#
# Test:
# Send a test Frisky Friday.
# Follow link to article--it should start with link.example.com
# SendGrid increments the Click Tracking counter
class SendgridLinkProxyController < ActionController::Base
SENDGRID_CLICK_TRACKING_URL = 'https://sendgrid.net'.freeze
def index
# Make matching request to SendGrid
sendgrid_url = URI.parse("#{SENDGRID_CLICK_TRACKING_URL}#{request.env['ORIGINAL_FULLPATH']}").to_s
sendgrid_headers = { 'Host' => CFG.SENDGRID_PROXY_HOSTNAME }
Rails.logger.info("sendgrid_link_proxy_controller.rb: fetching #{sendgrid_url}, headers: #{sendgrid_headers}")
sendgrid_response = HTTParty.get(sendgrid_url, headers: sendgrid_headers, follow_redirects: false) # , debug_output: STDOUT)
# Make matching response to browser
user_response_status = sendgrid_response.code
response.set_header('location', sendgrid_response.headers['location'])
Rails.logger.info("sendgrid_link_proxy_controller.rb: responding status_code: #{user_response_status}, location header: #{response.header['location']}")
render html: sendgrid_response.body.html_safe, # We are trusting SendGrid. Winston think's that's OK. [Winston Dec 2018]
status: user_response_status
end
end
这里有一个 RSpec 文件可以搭配它：
require 'spec_helper'
describe SendgridLinkProxyController do
describe '#index' do
before do
@sendgrid_response = {
headers: {},
body: '<html>SENDGRID BODY</html>',
code: 200
}
request.env['ORIGINAL_FULLPATH'] = '/wf/click?upn=BLAH'
CFG.SENDGRID_PROXY_HOSTNAME = 'link.example.com'
end
subject do
allow(HTTParty)
.to receive(:get)
.and_return(double('Mock Sendgrid Response', @sendgrid_response))
get :index, params: {a: 'click'}
end
it 'requests page from sendgrid with same path and with Host header' do
expect(HTTParty).to receive(:get)
.with('https://sendgrid.net/wf/click?upn=BLAH',
headers: { 'Host' => 'link.example.com' },
follow_redirects: false
)
subject
end
context 'when receiving a click-tracking redirect link' do
before do
@sendgrid_response[:code] = 302
@sendgrid_response[:headers]['location'] = 'https://example.com/TARGET'
end
it 'redirects browser to target link' do
subject
expect(response.status).to eq(302)
expect(response.headers['location']).to eq('https://example.com/TARGET')
end
end
context 'when receiving an unsubcribe link' do
before do
request.env['ORIGINAL_FULLPATH'] = '/wf/unsubscribe?upn=BLAH'
end
it 'renders sendgrid's unsubscribe page' do
subject
expect(response.body).to eq('<html>SENDGRID BODY</html>')
end
end
end
end