commands: fix panic when expected files field is nil

License: MIT
Signed-off-by: Jeromy <why@ipfs.io>

commands/http/parse.go

@@ -104,13 +104,17 @@ func Parse(r *http.Request, root *cmds.Command) (cmds.Request, error) {
 	contentType := r.Header.Get(contentTypeHeader)
 	mediatype, _, _ := mime.ParseMediaType(contentType)
 
-	var f *files.MultipartFile
+	var f files.File
 	if mediatype == "multipart/form-data" {
-		f = &files.MultipartFile{Mediatype: mediatype}
-		f.Reader, err = r.MultipartReader()
+		reader, err := r.MultipartReader()
 		if err != nil {
 			return nil, err
 		}
+
+		f = &files.MultipartFile{
+			Mediatype: mediatype,
+			Reader:    reader,
+		}
 	}
 
 	// if there is a required filearg, error if no files were provided

commands/request.go

@@ -231,7 +231,8 @@ func (r *request) VarArgs(f func(string) error) error {
 	}
 
 	if r.files == nil {
-		return fmt.Errorf("expected more arguments from stdin")
+		log.Warning("expected more arguments from stdin")
+		return nil
 	}
 
 	fi, err := r.files.NextFile()

test/sharness/t0600-issues-and-regressions-online.sh

@@ -10,15 +10,23 @@ test_launch_ipfs_daemon
 
 # Tests go here
 
-test_expect_sucess "commands command with flag flags works via HTTP API - #2301" '
+test_expect_success "commands command with flag flags works via HTTP API - #2301" '
 	curl "http://$API_ADDR/api/v0/commands?flags" | grep "verbose"
 '
 
-test_expect_sucess "ipfs refs local over HTTP API returns NDJOSN not flat - #2803" '
+test_expect_success "ipfs refs local over HTTP API returns NDJOSN not flat - #2803" '
 	echo "Hello World" | ipfs add &&
 	curl "http://$API_ADDR/api/v0/refs/local" | grep "Ref" | grep "Err"
 '
 
+test_expect_success "args expecting stdin dont crash when not given" '
+	curl "$API_ADDR/api/v0/bootstrap/add" > result
+'
+
+test_expect_success "no panic traces on daemon" '
+	test_expect_failure grep "nil pointer dereference" daemon_err
+'
+
 test_kill_ipfs_daemon
 
 test_done