From ade11bea519bfcf57c21f0ae6e04957e07629797 Mon Sep 17 00:00:00 2001
From: Benjie Gillam <benjie@jemjie.com>
Date: Thu, 31 May 2018 16:21:35 +0100
Subject: [PATCH] feat(hooks): add a hook to the request handler (#770)

---
 package.json                                          |  2 +-
 .../http/createPostGraphileHttpRequestHandler.js      | 11 ++++++++++-
 yarn.lock                                             |  6 ++++++
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index 046cfdaf73..fc7d7cb37d 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "parseurl": "^1.3.1",
     "pg": ">=6.1.0 <8",
     "pg-connection-string": "^0.1.3",
-    "pg-sql2": "2.0.0",
+    "pg-sql2": "2.1.0",
     "postgraphile-core": "4.0.0-beta.7.2",
     "send": "^0.16.1",
     "tslib": "^1.5.0"
diff --git a/src/postgraphile/http/createPostGraphileHttpRequestHandler.js b/src/postgraphile/http/createPostGraphileHttpRequestHandler.js
index 569cf8a1a7..f0debba75c 100644
--- a/src/postgraphile/http/createPostGraphileHttpRequestHandler.js
+++ b/src/postgraphile/http/createPostGraphileHttpRequestHandler.js
@@ -308,7 +308,16 @@ export default function createPostGraphileHttpRequestHandler(options) {
    * @param {IncomingMessage} req
    * @param {ServerResponse} res
    */
-  const requestHandler = async (req, res, next) => {
+  const requestHandler = async (incomingReq, res, next) => {
+    // You can use this hook either to modify the incoming request or to tell
+    // PostGraphile not to handle the request further (return null). NOTE: if
+    // you return `null` from this hook then you are also responsible for
+    // calling `next()` (should that be required).
+    const req = pluginHook('postgraphile:http:handler', incomingReq, {options, res, next})
+    if (req == null) {
+      return
+    }
+
     // Add our CORS headers to be good web citizens (there are perf
     // implications though so be careful!)
     //
diff --git a/yarn.lock b/yarn.lock
index f4daddda1f..d2762489f6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5921,6 +5921,12 @@ pg-sql2@2.0.0:
   dependencies:
     debug ">=2 <3"
 
+pg-sql2@2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/pg-sql2/-/pg-sql2-2.1.0.tgz#f86978278451482099e4f8e8db8b7486ecb67e3f"
+  dependencies:
+    debug ">=2 <3"
+
 pg-types@~1.12.1:
   version "1.12.1"
   resolved "https://registry.yarnpkg.com/pg-types/-/pg-types-1.12.1.tgz#d64087e3903b58ffaad279e7595c52208a14c3d2"