allow checksum headers in single PutObject() (#184)

Author: harshavardhana

include/miniocpp/response.h

@@ -190,6 +190,10 @@ struct CreateMultipartUploadResponse : public Response {
 struct PutObjectResponse : public Response {
   std::string etag;
   std::string version_id;
+  std::string checksumCRC32;
+  std::string checksumCRC32C;
+  std::string checksumSHA1;
+  std::string checksumSHA256;
 
   PutObjectResponse() = default;
 

src/baseclient.cc

@@ -1384,6 +1384,10 @@ PutObjectResponse BaseClient::PutObject(PutObjectApiArgs args) {
   PutObjectResponse resp;
   resp.etag = utils::Trim(response.headers.GetFront("etag"), '"');
   resp.version_id = response.headers.GetFront("x-amz-version-id");
+  resp.checksumCRC32 = response.headers.GetFront("x-amz-checksum-crc32");
+  resp.checksumCRC32C = response.headers.GetFront("x-amz-checksum-crc32c");
+  resp.checksumSHA1 = response.headers.GetFront("x-amz-checksum-sha1");
+  resp.checksumSHA256 = response.headers.GetFront("x-amz-checksum-sha256");
 
   return resp;
 }