From fbc5248ef8b3087bd334e1f805135fe1ce43ff0d Mon Sep 17 00:00:00 2001
From: Martin Boehm <martin.boehm@1mbsoftware.net>
Date: Sun, 11 Mar 2018 01:31:09 +0100
Subject: [PATCH] Handle HTTP status codes returned from blockchain rpc

---
 bchain/coins/btc/bitcoinrpc.go | 9 +++++++++
 blockbook.go                   | 4 ++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/bchain/coins/btc/bitcoinrpc.go b/bchain/coins/btc/bitcoinrpc.go
index 3fdceb4d..c52aaa57 100644
--- a/bchain/coins/btc/bitcoinrpc.go
+++ b/bchain/coins/btc/bitcoinrpc.go
@@ -581,6 +581,15 @@ func (b *BitcoinRPC) call(req interface{}, res interface{}) error {
 	// read the entire response body until the end to avoid memory leak when reusing http connection
 	// see http://devs.cloudimmunity.com/gotchas-and-common-mistakes-in-go-golang/
 	defer io.Copy(ioutil.Discard, httpRes.Body)
+	// if server returns HTTP error code it might not return json with response
+	// handle both cases
+	if httpRes.StatusCode != 200 {
+		err = json.NewDecoder(httpRes.Body).Decode(&res)
+		if err != nil {
+			return errors.New(httpRes.Status)
+		}
+		return nil
+	}
 	return json.NewDecoder(httpRes.Body).Decode(&res)
 }
 
diff --git a/blockbook.go b/blockbook.go
index a50a61aa..f41ec41e 100644
--- a/blockbook.go
+++ b/blockbook.go
@@ -111,12 +111,12 @@ func main() {
 
 	var err error
 	if chain, err = coins.NewBlockChain(*coin, *rpcURL, *rpcUser, *rpcPass, time.Duration(*rpcTimeout)*time.Second, *parse); err != nil {
-		glog.Fatal("NewBlockChain: ", err)
+		glog.Fatal("rpc: ", err)
 	}
 
 	index, err = db.NewRocksDB(*dbPath, chain.GetChainParser())
 	if err != nil {
-		glog.Fatal("NewRocksDB: ", err)
+		glog.Fatal("rocksDB: ", err)
 	}
 	defer index.Close()