refactoring

1 files changed, 302 insertions, 0 deletions

diff --git a/weed/s3api/s3err/s3api_errors.go b/weed/s3api/s3err/s3api_errors.go
new file mode 100644
index 000000000..d5fdba0a0
--- /dev/null
+++ b/weed/s3api/s3err/s3api_errors.go
@@ -0,0 +1,302 @@
+package s3err
+
+import (
+	"encoding/xml"
+	"net/http"
+)
+
+// APIError structure
+type APIError struct {
+	Code           string
+	Description    string
+	HTTPStatusCode int
+}
+
+// RESTErrorResponse - error response format
+type RESTErrorResponse struct {
+	XMLName   xml.Name `xml:"Error" json:"-"`
+	Code      string   `xml:"Code" json:"Code"`
+	Message   string   `xml:"Message" json:"Message"`
+	Resource  string   `xml:"Resource" json:"Resource"`
+	RequestID string   `xml:"RequestId" json:"RequestId"`
+}
+
+// ErrorCode type of error status.
+type ErrorCode int
+
+// Error codes, see full list at http://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html
+const (
+	ErrNone ErrorCode = iota
+	ErrAccessDenied
+	ErrMethodNotAllowed
+	ErrBucketNotEmpty
+	ErrBucketAlreadyExists
+	ErrBucketAlreadyOwnedByYou
+	ErrNoSuchBucket
+	ErrNoSuchKey
+	ErrNoSuchUpload
+	ErrInvalidBucketName
+	ErrInvalidDigest
+	ErrInvalidMaxKeys
+	ErrInvalidMaxUploads
+	ErrInvalidMaxParts
+	ErrInvalidPartNumberMarker
+	ErrInvalidPart
+	ErrInternalError
+	ErrInvalidCopyDest
+	ErrInvalidCopySource
+	ErrAuthHeaderEmpty
+	ErrSignatureVersionNotSupported
+	ErrMissingFields
+	ErrMissingCredTag
+	ErrCredMalformed
+	ErrMalformedXML
+	ErrMalformedDate
+	ErrMalformedPresignedDate
+	ErrMalformedCredentialDate
+	ErrMissingSignHeadersTag
+	ErrMissingSignTag
+	ErrUnsignedHeaders
+	ErrInvalidQueryParams
+	ErrInvalidQuerySignatureAlgo
+	ErrExpiredPresignRequest
+	ErrMalformedExpires
+	ErrNegativeExpires
+	ErrMaximumExpires
+	ErrSignatureDoesNotMatch
+	ErrContentSHA256Mismatch
+	ErrInvalidAccessKeyID
+	ErrRequestNotReadyYet
+	ErrMissingDateHeader
+	ErrInvalidRequest
+	ErrNotImplemented
+)
+
+// error code to APIError structure, these fields carry respective
+// descriptions for all the error responses.
+var errorCodeResponse = map[ErrorCode]APIError{
+	ErrAccessDenied: {
+		Code:           "AccessDenied",
+		Description:    "Access Denied.",
+		HTTPStatusCode: http.StatusForbidden,
+	},
+	ErrMethodNotAllowed: {
+		Code:           "MethodNotAllowed",
+		Description:    "The specified method is not allowed against this resource.",
+		HTTPStatusCode: http.StatusMethodNotAllowed,
+	},
+	ErrBucketNotEmpty: {
+		Code:           "BucketNotEmpty",
+		Description:    "The bucket you tried to delete is not empty",
+		HTTPStatusCode: http.StatusConflict,
+	},
+	ErrBucketAlreadyExists: {
+		Code:           "BucketAlreadyExists",
+		Description:    "The requested bucket name is not available. The bucket namespace is shared by all users of the system. Please select a different name and try again.",
+		HTTPStatusCode: http.StatusConflict,
+	},
+	ErrBucketAlreadyOwnedByYou: {
+		Code:           "BucketAlreadyOwnedByYou",
+		Description:    "Your previous request to create the named bucket succeeded and you already own it.",
+		HTTPStatusCode: http.StatusConflict,
+	},
+	ErrInvalidBucketName: {
+		Code:           "InvalidBucketName",
+		Description:    "The specified bucket is not valid.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidDigest: {
+		Code:           "InvalidDigest",
+		Description:    "The Content-Md5 you specified is not valid.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidMaxUploads: {
+		Code:           "InvalidArgument",
+		Description:    "Argument max-uploads must be an integer between 0 and 2147483647",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidMaxKeys: {
+		Code:           "InvalidArgument",
+		Description:    "Argument maxKeys must be an integer between 0 and 2147483647",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidMaxParts: {
+		Code:           "InvalidArgument",
+		Description:    "Argument max-parts must be an integer between 0 and 2147483647",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidPartNumberMarker: {
+		Code:           "InvalidArgument",
+		Description:    "Argument partNumberMarker must be an integer.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrNoSuchBucket: {
+		Code:           "NoSuchBucket",
+		Description:    "The specified bucket does not exist",
+		HTTPStatusCode: http.StatusNotFound,
+	},
+	ErrNoSuchKey: {
+		Code:           "NoSuchKey",
+		Description:    "The specified key does not exist.",
+		HTTPStatusCode: http.StatusNotFound,
+	},
+	ErrNoSuchUpload: {
+		Code:           "NoSuchUpload",
+		Description:    "The specified multipart upload does not exist. The upload ID may be invalid, or the upload may have been aborted or completed.",
+		HTTPStatusCode: http.StatusNotFound,
+	},
+	ErrInternalError: {
+		Code:           "InternalError",
+		Description:    "We encountered an internal error, please try again.",
+		HTTPStatusCode: http.StatusInternalServerError,
+	},
+
+	ErrInvalidPart: {
+		Code:           "InvalidPart",
+		Description:    "One or more of the specified parts could not be found.  The part may not have been uploaded, or the specified entity tag may not match the part's entity tag.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+
+	ErrInvalidCopyDest: {
+		Code:           "InvalidRequest",
+		Description:    "This copy request is illegal because it is trying to copy an object to itself without changing the object's metadata, storage class, website redirect location or encryption attributes.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidCopySource: {
+		Code:           "InvalidArgument",
+		Description:    "Copy Source must mention the source bucket and key: sourcebucket/sourcekey.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+
+	ErrMalformedXML: {
+		Code:           "MalformedXML",
+		Description:    "The XML you provided was not well-formed or did not validate against our published schema.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+
+	ErrAuthHeaderEmpty: {
+		Code:           "InvalidArgument",
+		Description:    "Authorization header is invalid -- one and only one ' ' (space) required.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrSignatureVersionNotSupported: {
+		Code:           "InvalidRequest",
+		Description:    "The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrMissingFields: {
+		Code:           "MissingFields",
+		Description:    "Missing fields in request.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrMissingCredTag: {
+		Code:           "InvalidRequest",
+		Description:    "Missing Credential field for this request.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrCredMalformed: {
+		Code:           "AuthorizationQueryParametersError",
+		Description:    "Error parsing the X-Amz-Credential parameter; the Credential is mal-formed; expecting \"<YOUR-AKID>/YYYYMMDD/REGION/SERVICE/aws4_request\".",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrMalformedDate: {
+		Code:           "MalformedDate",
+		Description:    "Invalid date format header, expected to be in ISO8601, RFC1123 or RFC1123Z time format.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrMalformedPresignedDate: {
+		Code:           "AuthorizationQueryParametersError",
+		Description:    "X-Amz-Date must be in the ISO8601 Long Format \"yyyyMMdd'T'HHmmss'Z'\"",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrMissingSignHeadersTag: {
+		Code:           "InvalidArgument",
+		Description:    "Signature header missing SignedHeaders field.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrMissingSignTag: {
+		Code:           "AccessDenied",
+		Description:    "Signature header missing Signature field.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+
+	ErrUnsignedHeaders: {
+		Code:           "AccessDenied",
+		Description:    "There were headers present in the request which were not signed",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidQueryParams: {
+		Code:           "AuthorizationQueryParametersError",
+		Description:    "Query-string authentication version 4 requires the X-Amz-Algorithm, X-Amz-Credential, X-Amz-Signature, X-Amz-Date, X-Amz-SignedHeaders, and X-Amz-Expires parameters.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidQuerySignatureAlgo: {
+		Code:           "AuthorizationQueryParametersError",
+		Description:    "X-Amz-Algorithm only supports \"AWS4-HMAC-SHA256\".",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrExpiredPresignRequest: {
+		Code:           "AccessDenied",
+		Description:    "Request has expired",
+		HTTPStatusCode: http.StatusForbidden,
+	},
+	ErrMalformedExpires: {
+		Code:           "AuthorizationQueryParametersError",
+		Description:    "X-Amz-Expires should be a number",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrNegativeExpires: {
+		Code:           "AuthorizationQueryParametersError",
+		Description:    "X-Amz-Expires must be non-negative",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrMaximumExpires: {
+		Code:           "AuthorizationQueryParametersError",
+		Description:    "X-Amz-Expires must be less than a week (in seconds); that is, the given X-Amz-Expires must be less than 604800 seconds",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+
+	ErrInvalidAccessKeyID: {
+		Code:           "InvalidAccessKeyId",
+		Description:    "The access key ID you provided does not exist in our records.",
+		HTTPStatusCode: http.StatusForbidden,
+	},
+
+	ErrRequestNotReadyYet: {
+		Code:           "AccessDenied",
+		Description:    "Request is not valid yet",
+		HTTPStatusCode: http.StatusForbidden,
+	},
+
+	ErrSignatureDoesNotMatch: {
+		Code:           "SignatureDoesNotMatch",
+		Description:    "The request signature we calculated does not match the signature you provided. Check your key and signing method.",
+		HTTPStatusCode: http.StatusForbidden,
+	},
+
+	ErrContentSHA256Mismatch: {
+		Code:           "XAmzContentSHA256Mismatch",
+		Description:    "The provided 'x-amz-content-sha256' header does not match what was computed.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrMissingDateHeader: {
+		Code:           "AccessDenied",
+		Description:    "AWS authentication requires a valid Date or x-amz-date header",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidRequest: {
+		Code:           "InvalidRequest",
+		Description:    "Invalid Request",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrNotImplemented: {
+		Code:           "NotImplemented",
+		Description:    "A header you provided implies functionality that is not implemented",
+		HTTPStatusCode: http.StatusNotImplemented,
+	},
+}
+
+// GetAPIError provides API Error for input API error code.
+func GetAPIError(code ErrorCode) APIError {
+	return errorCodeResponse[code]
+}