From 4acfae712723fae025df6b841f9cc0e80c8ca464 Mon Sep 17 00:00:00 2001
From: Simon Kirsten <1972314+skirsten@users.noreply.github.com>
Date: Fri, 21 Oct 2022 22:38:04 +0200
Subject: [PATCH] Allow empty contentTypeStartsWith in PostPolicy (#1710)

---
 functional_tests.go | 4 ----
 post-policy.go      | 4 +---
 2 files changed, 1 insertion(+), 7 deletions(-)

diff --git a/functional_tests.go b/functional_tests.go
index 72f584850..7b7652811 100644
--- a/functional_tests.go
+++ b/functional_tests.go
@@ -4216,10 +4216,6 @@ func testPresignedPostPolicy() {
 		logError(testName, function, args, startTime, "", "SetContentType did not fail for invalid conditions", err)
 		return
 	}
-	if err := policy.SetContentTypeStartsWith(""); err == nil {
-		logError(testName, function, args, startTime, "", "SetContentTypeStartsWith did not fail for invalid conditions", err)
-		return
-	}
 	if err := policy.SetContentLengthRange(1024*1024, 1024); err == nil {
 		logError(testName, function, args, startTime, "", "SetContentLengthRange did not fail for invalid conditions", err)
 		return
diff --git a/post-policy.go b/post-policy.go
index 06bf78b69..3cd97c0eb 100644
--- a/post-policy.go
+++ b/post-policy.go
@@ -171,10 +171,8 @@ func (p *PostPolicy) SetContentType(contentType string) error {
 
 // SetContentTypeStartsWith - Sets what content-type of the object for this policy
 // based upload can start with.
+// If "" is provided it allows all content-types.
 func (p *PostPolicy) SetContentTypeStartsWith(contentTypeStartsWith string) error {
-	if strings.TrimSpace(contentTypeStartsWith) == "" || contentTypeStartsWith == "" {
-		return errInvalidArgument("No content type specified.")
-	}
 	policyCond := policyCondition{
 		matchType: "starts-with",
 		condition: "$Content-Type",