Fix server side copy of files with ? in - fixes #7058 (#7059)

Before this change the CopyObjectHandler and the CopyObjectPartHandler
both looked for a `versionId` parameter on the `X-Amz-Copy-Source` URL
for the version of the object to be copied on the URL unescaped version
of the header.  This meant that files that had question marks in were
truncated after the question mark so that files with `?` in their
names could not be server side copied.

After this change the URL unescaping is done during the parsing of the
`versionId` parameter which fixes the problem.

This change also introduces the same logic for the
`X-Amz-Copy-Source-Version-Id` header field which was previously
ignored, namely returning an error if it is present and not `null`
since minio does not currently support versions.

S3 Docs:
- https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectCOPY.html
- https://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadUploadPartCopy.html

cmd/object-handlers.go

@@ -653,12 +653,8 @@ func (api objectAPIHandlers) CopyObjectHandler(w http.ResponseWriter, r *http.Re
 
 	// TODO: Reject requests where body/payload is present, for now we don't even read it.
 
-	// Copy source path.
-	cpSrcPath, err := url.QueryUnescape(r.Header.Get("X-Amz-Copy-Source"))
-	if err != nil {
-		// Save unescaped string as is.
-		cpSrcPath = r.Header.Get("X-Amz-Copy-Source")
-	}
+	// Read escaped copy source path to check for parameters.
+	cpSrcPath := r.Header.Get("X-Amz-Copy-Source")
 
 	// Check https://docs.aws.amazon.com/AmazonS3/latest/dev/ObjectVersioning.html
 	// Regardless of whether you have enabled versioning, each object in your bucket
@@ -673,8 +669,18 @@ func (api objectAPIHandlers) CopyObjectHandler(w http.ResponseWriter, r *http.Re
 			writeErrorResponse(w, ErrNoSuchVersion, r.URL, guessIsBrowserReq(r))
 			return
 		}
+		// Note that url.Parse does the unescaping
 		cpSrcPath = u.Path
 	}
+	if vid := r.Header.Get("X-Amz-Copy-Source-Version-Id"); vid != "" {
+		// Check if versionId header was added, if yes then check if
+		// its non "null" value, we should error out since we do not support
+		// any versions other than "null".
+		if vid != "null" {
+			writeErrorResponse(w, ErrNoSuchVersion, r.URL, guessIsBrowserReq(r))
+			return
+		}
+	}
 
 	srcBucket, srcObject := path2BucketAndObject(cpSrcPath)
 	// If source object is empty or bucket is empty, reply back invalid copy source.
@@ -699,7 +705,7 @@ func (api objectAPIHandlers) CopyObjectHandler(w http.ResponseWriter, r *http.Re
 	}
 
 	var srcOpts, dstOpts ObjectOptions
-	srcOpts, err = copySrcEncryptionOpts(ctx, r, srcBucket, srcObject)
+	srcOpts, err := copySrcEncryptionOpts(ctx, r, srcBucket, srcObject)
 	if err != nil {
 		logger.LogIf(ctx, err)
 		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
@@ -1466,12 +1472,8 @@ func (api objectAPIHandlers) CopyObjectPartHandler(w http.ResponseWriter, r *htt
 		return
 	}
 
-	// Copy source path.
-	cpSrcPath, err := url.QueryUnescape(r.Header.Get("X-Amz-Copy-Source"))
-	if err != nil {
-		// Save unescaped string as is.
-		cpSrcPath = r.Header.Get("X-Amz-Copy-Source")
-	}
+	// Read escaped copy source path to check for parameters.
+	cpSrcPath := r.Header.Get("X-Amz-Copy-Source")
 
 	// Check https://docs.aws.amazon.com/AmazonS3/latest/dev/ObjectVersioning.html
 	// Regardless of whether you have enabled versioning, each object in your bucket
@@ -1486,8 +1488,18 @@ func (api objectAPIHandlers) CopyObjectPartHandler(w http.ResponseWriter, r *htt
 			writeErrorResponse(w, ErrNoSuchVersion, r.URL, guessIsBrowserReq(r))
 			return
 		}
+		// Note that url.Parse does the unescaping
 		cpSrcPath = u.Path
 	}
+	if vid := r.Header.Get("X-Amz-Copy-Source-Version-Id"); vid != "" {
+		// Check if X-Amz-Copy-Source-Version-Id header was added, if yes then check if
+		// its non "null" value, we should error out since we do not support
+		// any versions other than "null".
+		if vid != "null" {
+			writeErrorResponse(w, ErrNoSuchVersion, r.URL, guessIsBrowserReq(r))
+			return
+		}
+	}
 
 	srcBucket, srcObject := path2BucketAndObject(cpSrcPath)
 	// If source object is empty or bucket is empty, reply back invalid copy source.

cmd/object-handlers_test.go

@@ -25,6 +25,7 @@ import (
 	"encoding/xml"
 	"fmt"
 	"io"
+	"runtime"
 	"strings"
 
 	"io/ioutil"
@@ -1523,14 +1524,15 @@ func testAPICopyObjectPartHandler(obj ObjectLayer, instanceType, bucketName stri
 
 	// test cases with inputs and expected result for Copy Object.
 	testCases := []struct {
-		bucketName        string
-		copySourceHeader  string // data for "X-Amz-Copy-Source" header. Contains the object to be copied in the URL.
-		copySourceRange   string // data for "X-Amz-Copy-Source-Range" header, contains the byte range offsets of data to be copied.
-		uploadID          string // uploadID of the transaction.
-		invalidPartNumber bool   // Sets an invalid multipart.
-		maximumPartNumber bool   // Sets a maximum parts.
-		accessKey         string
-		secretKey         string
+		bucketName          string
+		copySourceHeader    string // data for "X-Amz-Copy-Source" header. Contains the object to be copied in the URL.
+		copySourceVersionId string // data for "X-Amz-Copy-Source-Version-Id" header.
+		copySourceRange     string // data for "X-Amz-Copy-Source-Range" header, contains the byte range offsets of data to be copied.
+		uploadID            string // uploadID of the transaction.
+		invalidPartNumber   bool   // Sets an invalid multipart.
+		maximumPartNumber   bool   // Sets a maximum parts.
+		accessKey           string
+		secretKey           string
 		// expected output.
 		expectedRespStatus int
 	}{
@@ -1694,6 +1696,44 @@ func testAPICopyObjectPartHandler(obj ObjectLayer, instanceType, bucketName stri
 			secretKey:          credentials.SecretKey,
 			expectedRespStatus: http.StatusOK,
 		},
+		// Test case - 14, copy part 1 from from newObject1 with null versionId
+		{
+			bucketName:         bucketName,
+			uploadID:           uploadID,
+			copySourceHeader:   url.QueryEscape("/"+bucketName+"/"+objectName) + "?versionId=null",
+			accessKey:          credentials.AccessKey,
+			secretKey:          credentials.SecretKey,
+			expectedRespStatus: http.StatusOK,
+		},
+		// Test case - 15, copy part 1 from from newObject1 with non null versionId
+		{
+			bucketName:         bucketName,
+			uploadID:           uploadID,
+			copySourceHeader:   url.QueryEscape("/"+bucketName+"/"+objectName) + "?versionId=17",
+			accessKey:          credentials.AccessKey,
+			secretKey:          credentials.SecretKey,
+			expectedRespStatus: http.StatusNotFound,
+		},
+		// Test case - 16, copy part 1 from from newObject1 with null X-Amz-Copy-Source-Version-Id
+		{
+			bucketName:          bucketName,
+			uploadID:            uploadID,
+			copySourceHeader:    url.QueryEscape("/" + bucketName + "/" + objectName),
+			copySourceVersionId: "null",
+			accessKey:           credentials.AccessKey,
+			secretKey:           credentials.SecretKey,
+			expectedRespStatus:  http.StatusOK,
+		},
+		// Test case - 16, copy part 1 from from newObject1 with non null X-Amz-Copy-Source-Version-Id
+		{
+			bucketName:          bucketName,
+			uploadID:            uploadID,
+			copySourceHeader:    url.QueryEscape("/" + bucketName + "/" + objectName),
+			copySourceVersionId: "17",
+			accessKey:           credentials.AccessKey,
+			secretKey:           credentials.SecretKey,
+			expectedRespStatus:  http.StatusNotFound,
+		},
 	}
 
 	for i, testCase := range testCases {
@@ -1717,6 +1757,9 @@ func testAPICopyObjectPartHandler(obj ObjectLayer, instanceType, bucketName stri
 		if testCase.copySourceHeader != "" {
 			req.Header.Set("X-Amz-Copy-Source", testCase.copySourceHeader)
 		}
+		if testCase.copySourceVersionId != "" {
+			req.Header.Set("X-Amz-Copy-Source-Version-Id", testCase.copySourceVersionId)
+		}
 		if testCase.copySourceRange != "" {
 			req.Header.Set("X-Amz-Copy-Source-Range", testCase.copySourceRange)
 		}
@@ -1752,6 +1795,9 @@ func testAPICopyObjectPartHandler(obj ObjectLayer, instanceType, bucketName stri
 		if testCase.copySourceHeader != "" {
 			reqV2.Header.Set("X-Amz-Copy-Source", testCase.copySourceHeader)
 		}
+		if testCase.copySourceVersionId != "" {
+			reqV2.Header.Set("X-Amz-Copy-Source-Version-Id", testCase.copySourceVersionId)
+		}
 		if testCase.copySourceRange != "" {
 			reqV2.Header.Set("X-Amz-Copy-Source-Range", testCase.copySourceRange)
 		}
@@ -1802,7 +1848,10 @@ func TestAPICopyObjectHandler(t *testing.T) {
 func testAPICopyObjectHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
 	credentials auth.Credentials, t *testing.T) {
 
-	objectName := "test-object"
+	objectName := "test?object" // use file with ? to test URL parsing...
+	if runtime.GOOS == "windows" {
+		objectName = "test-object" // ...except on Windows
+	}
 	// object used for anonymous HTTP request test.
 	anonObject := "anon-object"
 	var err error
@@ -1861,6 +1910,7 @@ func testAPICopyObjectHandler(obj ObjectLayer, instanceType, bucketName string,
 		bucketName           string
 		newObjectName        string // name of the newly copied object.
 		copySourceHeader     string // data for "X-Amz-Copy-Source" header. Contains the object to be copied in the URL.
+		copySourceVersionId  string // data for "X-Amz-Copy-Source-Version-Id" header.
 		copyModifiedHeader   string // data for "X-Amz-Copy-Source-If-Modified-Since" header
 		copyUnmodifiedHeader string // data for "X-Amz-Copy-Source-If-Unmodified-Since" header
 		metadataGarbage      bool
@@ -2071,6 +2121,44 @@ func testAPICopyObjectHandler(obj ObjectLayer, instanceType, bucketName string,
 			secretKey:            credentials.SecretKey,
 			expectedRespStatus:   http.StatusOK,
 		},
+		// Test case - 17, copy metadata from newObject1 with null versionId
+		{
+			bucketName:         bucketName,
+			newObjectName:      "newObject1",
+			copySourceHeader:   url.QueryEscape("/"+bucketName+"/"+objectName) + "?versionId=null",
+			accessKey:          credentials.AccessKey,
+			secretKey:          credentials.SecretKey,
+			expectedRespStatus: http.StatusOK,
+		},
+		// Test case - 18, copy metadata from newObject1 with non null versionId
+		{
+			bucketName:         bucketName,
+			newObjectName:      "newObject1",
+			copySourceHeader:   url.QueryEscape("/"+bucketName+"/"+objectName) + "?versionId=17",
+			accessKey:          credentials.AccessKey,
+			secretKey:          credentials.SecretKey,
+			expectedRespStatus: http.StatusNotFound,
+		},
+		// Test case - 19, copy metadata from newObject1 with null X-Amz-Copy-Source-Version-Id
+		{
+			bucketName:          bucketName,
+			newObjectName:       "newObject1",
+			copySourceHeader:    url.QueryEscape("/" + bucketName + "/" + objectName),
+			copySourceVersionId: "null",
+			accessKey:           credentials.AccessKey,
+			secretKey:           credentials.SecretKey,
+			expectedRespStatus:  http.StatusOK,
+		},
+		// Test case - 20, copy metadata from newObject1 with non null X-Amz-Copy-Source-Version-Id
+		{
+			bucketName:          bucketName,
+			newObjectName:       "newObject1",
+			copySourceHeader:    url.QueryEscape("/" + bucketName + "/" + objectName),
+			copySourceVersionId: "17",
+			accessKey:           credentials.AccessKey,
+			secretKey:           credentials.SecretKey,
+			expectedRespStatus:  http.StatusNotFound,
+		},
 	}
 
 	for i, testCase := range testCases {
@@ -2089,6 +2177,9 @@ func testAPICopyObjectHandler(obj ObjectLayer, instanceType, bucketName string,
 		if testCase.copySourceHeader != "" {
 			req.Header.Set("X-Amz-Copy-Source", testCase.copySourceHeader)
 		}
+		if testCase.copySourceVersionId != "" {
+			req.Header.Set("X-Amz-Copy-Source-Version-Id", testCase.copySourceVersionId)
+		}
 		if testCase.copyModifiedHeader != "" {
 			req.Header.Set("X-Amz-Copy-Source-If-Modified-Since", testCase.copyModifiedHeader)
 		}
@@ -2150,6 +2241,9 @@ func testAPICopyObjectHandler(obj ObjectLayer, instanceType, bucketName string,
 		if testCase.copySourceHeader != "" {
 			reqV2.Header.Set("X-Amz-Copy-Source", testCase.copySourceHeader)
 		}
+		if testCase.copySourceVersionId != "" {
+			reqV2.Header.Set("X-Amz-Copy-Source-Version-Id", testCase.copySourceVersionId)
+		}
 		if testCase.copyModifiedHeader != "" {
 			reqV2.Header.Set("X-Amz-Copy-Source-If-Modified-Since", testCase.copyModifiedHeader)
 		}