From b6a562baec5ee28e9ec830e6f13cb52c88f7e8f5 Mon Sep 17 00:00:00 2001
From: Alex Zorin <alex@zorin.id.au>
Date: Mon, 29 Jul 2019 11:14:36 +1000
Subject: [PATCH] Allow debug printing of raw responses from Authy.

To enable, run with environment variable:

    AUTHY_DEBUG=1

This will hopefully make it easier to investigate issues like #1.
---
 authy.go | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/authy.go b/authy.go
index 6419f55..18513f0 100644
--- a/authy.go
+++ b/authy.go
@@ -1,6 +1,7 @@
 package authy
 
 import (
+	"bytes"
 	"context"
 	"encoding/hex"
 	"encoding/json"
@@ -8,6 +9,7 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"os"
 	"strconv"
 	"strings"
 	"time"
@@ -66,7 +68,17 @@ func (c Client) doRequest(ctx context.Context, method, url string, body io.Reade
 	}
 	defer resp.Body.Close()
 
-	return json.NewDecoder(resp.Body).Decode(&dest)
+	var r io.Reader = resp.Body
+	if os.Getenv("AUTHY_DEBUG") == "1" {
+		var debugBuf bytes.Buffer
+		r = io.TeeReader(resp.Body, &debugBuf)
+		defer func() {
+			fmt.Fprintf(os.Stderr, "[AUTHY_DEBUG] Sent request to: %s, got response: %s\n",
+				req.URL.String(), debugBuf.String())
+		}()
+	}
+
+	return json.NewDecoder(r).Decode(&dest)
 }
 
 // QueryUser fetches the status of an Authy user account.