From e56e6482b37401ba1eb0a0f722e40f6499b3b96e Mon Sep 17 00:00:00 2001
From: Ta-Ching Chen <contact@tachingchen.com>
Date: Fri, 22 Sep 2017 14:27:42 -0500
Subject: [PATCH] Fix missing checksum from CLI uploads (issue #342) (#343)

Archive upload from the CLI wasn't filling in the checksum field, causing validation to fail.
---
 fission/function.go | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/fission/function.go b/fission/function.go
index d3ab5a2d..34489c58 100644
--- a/fission/function.go
+++ b/fission/function.go
@@ -18,7 +18,10 @@ package main
 
 import (
 	"context"
+	"crypto/sha256"
+	"encoding/hex"
 	"fmt"
+	"io"
 	"io/ioutil"
 	"os"
 	"strings"
@@ -62,6 +65,22 @@ func createArchive(client *client.Client, fileName string) *fission.Archive {
 
 		archive.Type = fission.ArchiveTypeUrl
 		archive.URL = archiveUrl
+
+		f, err := os.Open(fileName)
+		if err != nil {
+			checkErr(err, fmt.Sprintf("find file %v", fileName))
+		}
+		defer f.Close()
+
+		h := sha256.New()
+		if _, err := io.Copy(h, f); err != nil {
+			checkErr(err, fmt.Sprintf("calculate checksum for file %v", fileName))
+		}
+
+		archive.Checksum = fission.Checksum{
+			Type: fission.ChecksumTypeSHA256,
+			Sum:  hex.EncodeToString(h.Sum(nil)),
+		}
 	}
 	return &archive
 }