From 99796c2069e071f490e52f969f0909788c0b66eb Mon Sep 17 00:00:00 2001
From: coverste <coverste@microsoft.com>
Date: Fri, 21 Jun 2019 10:53:01 -0700
Subject: [PATCH 1/3] fix host header

---
 full_config.yaml |  1 +
 web_requester.go | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/full_config.yaml b/full_config.yaml
index d4bd8ba..5414406 100644
--- a/full_config.yaml
+++ b/full_config.yaml
@@ -60,6 +60,7 @@ Request:
   Headers:
     Authorization: Bearer $APIKEY
     Content-Type: application/json
+    Host: example.com
 
   # POST request body
   # For binary body see https://yaml.org/type/binary.html
diff --git a/web_requester.go b/web_requester.go
index 89b3953..dfdebb3 100644
--- a/web_requester.go
+++ b/web_requester.go
@@ -153,6 +153,19 @@ func (w *webRequester) Request() error {
 	}
 
 	req.Header = w.headers
+
+	// from https://golang.org/src/net/http/request.go?#L124
+	// For client requests, the URL's Host specifies the server to
+	// connect to, while the Request's Host field optionally
+	// specifies the Host header value to send in the HTTP
+	// request.
+	if host, ok := w.headers["Host"]; ok {
+		if len(host) != 1 {
+			return errors.New("Host Header is not a single value.")
+		}
+		req.Host = host[0]
+	}
+
 	resp, err := httpClient.Do(req)
 
 	/* to look at the response body

From 6934f235c711fd16639374f5740da06b01c3f051 Mon Sep 17 00:00:00 2001
From: coverste <coverste@microsoft.com>
Date: Tue, 30 Jul 2019 12:44:54 -0700
Subject: [PATCH 2/3] code review comments

---
 web_requester.go | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/web_requester.go b/web_requester.go
index dfdebb3..7f5d806 100644
--- a/web_requester.go
+++ b/web_requester.go
@@ -159,11 +159,20 @@ func (w *webRequester) Request() error {
 	// connect to, while the Request's Host field optionally
 	// specifies the Host header value to send in the HTTP
 	// request.
-	if host, ok := w.headers["Host"]; ok {
-		if len(host) != 1 {
-			return errors.New("Host Header is not a single value.")
+
+	var hosts []string
+
+	// headers are case-insensitive
+	for k, v := range w.headers {
+		if strings.ToLower(k) == "host" {
+			hosts = append(hosts, v...)
 		}
-		req.Host = host[0]
+	}
+	if len(hosts) > 1 {
+		return errors.New("multiple host headers are not allowed")
+	}
+	if len(hosts) > 0 {
+		req.Host = hosts[0]
 	}
 
 	resp, err := httpClient.Do(req)

From 3a62319a693741bf67afe15bc2a11af7dbcd435f Mon Sep 17 00:00:00 2001
From: coverste <coverste@microsoft.com>
Date: Tue, 30 Jul 2019 14:55:08 -0700
Subject: [PATCH 3/3] code review comments

---
 web_requester.go | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/web_requester.go b/web_requester.go
index 7f5d806..f4d6dab 100644
--- a/web_requester.go
+++ b/web_requester.go
@@ -162,17 +162,17 @@ func (w *webRequester) Request() error {
 
 	var hosts []string
 
-	// headers are case-insensitive
-	for k, v := range w.headers {
-		if strings.ToLower(k) == "host" {
-			hosts = append(hosts, v...)
+	//case insensitive
+	if host, ok := w.headers["host"]; ok {
+		if len(hosts) != 1 {
+			return errors.New("multiple host headers are not allowed")
 		}
-	}
-	if len(hosts) > 1 {
-		return errors.New("multiple host headers are not allowed")
-	}
-	if len(hosts) > 0 {
-		req.Host = hosts[0]
+		req.Host = host[0]
+	} else if host, ok = w.headers["Host"]; ok {
+		if len(hosts) != 1 {
+			return errors.New("multiple host headers are not allowed")
+		}
+		req.Host = host[0]
 	}
 
 	resp, err := httpClient.Do(req)