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status.go
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status.go
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// Copyright (c) 2017 Johan Brandhorst
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package grpcweb
import (
"github.com/gopherjs/gopherjs/js"
// Include gRPC-web JS objects
_ "github.com/johanbrandhorst/gopherjs-grpc-web/grpcwebjs"
)
// Metadata is a simple string to string map.
type Metadata map[string]string
// Status is a gRPC-web Status.
type Status struct {
*js.Object
Code StatusCode `js:"code"`
Details string `js:"details"`
Metadata Metadata `js:"metadata"`
}
// StatusCode is a gRPC-web StatusCode.
type StatusCode int
const (
// Ok is Not an error; returned on success.
Ok = StatusCode(iota)
// Cancelled is returned when the operation was cancelled (typically by the caller).
Cancelled
// Unknown error. An example of where this error may be returned is if a
// Status value received from another address space belongs to an error-space
// that is not known in this address space. Also errors raised by APIs that
// do not return enough error information may be converted to this error.
Unknown
// InvalidArgument is returned when the Client specified an invalid argument.
// Note that this differs from FailedPrecondition.
// InvalidArgument indicates arguments that are problematic regardless
// of the state of the system (e.g., a malformed file name).
InvalidArgument
// DeadlineExceeded is returned when the deadlined expired before operation could complete.
// For operations that change the state of the system, this error may be returned even if the
// operation has completed successfully. For example, a successful response
// from a server could have been delayed long enough for the deadline to expire.
DeadlineExceeded
// NotFound is returned when some requested entity (e.g., file or directory) was not found.
NotFound
// AlreadyExists is returned when some entity that we attempted to create
// (e.g., file or directory) already exists.
AlreadyExists
// PermissionDenied is returned when the caller does not have permission
// to execute the specified operation. PermissionDenied must not be used
// for rejections caused by exhausting some resource
// (use ResourceExhausted instead for those errors).
// PermissionDenied must not be used if the caller can not be identified
// (use Unautheticated instead for those errors).
PermissionDenied
// Unauthenticated is returned when the request does not have valid
// authentication credentials for the operation.
Unauthenticated
// ResourceExhausted is returned when some resource has been exhausted,
// perhaps a per-user quota, or perhaps the entire file system is out of space.
ResourceExhausted
// FailedPrecondition is returned when an operation was rejected because
// the system is not in a state required for the operation's execution.
// For example, directory to be deleted may be non-empty,
// an rmdir operation is applied to a non-directory, etc.
//
// A litmus test that may help a service implementor in deciding
// between FailedPrecondition, Aborted, and Unavailable:
// (a) Use Unavailable if the client can retry just the failing call.
// (b) Use Aborted if the client should retry at a higher-level
// (e.g., restarting a read-modify-write sequence).
// (c) Use FailedPrecondition if the client should not retry until
// the system state has been explicitly fixed. E.g., if an "rmdir"
// fails because the directory is non-empty, FailedPrecondition
// should be returned since the client should not retry unless
// they have first fixed up the directory by deleting files from it.
// (d) Use FailedPrecondition if the client performs conditional
// REST Get/Update/Delete on a resource and the resource on the
// server does not match the condition. E.g., conflicting
// read-modify-write on the same resource.
FailedPrecondition
// Aborted is returned when the operation was aborted, typically due to a
// concurrency issue like sequencer check failures, transaction aborts, etc.
//
// See litmus test above for deciding between FailedPrecondition, Aborted,
// and Unavailable.
Aborted
// OutOfRange is returned when an operation was attempted past the valid range.
// E.g., seeking or reading past end of file.
//
// Unlike INVALID_ARGUMENT, this error indicates a problem that may be fixed
// if the system state changes. For example, a 32-bit file system will
// generate INVALID_ARGUMENT if asked to read at an offset that is not in the
// range [0,2^32-1], but it will generate OutOfRange if asked to read from
// an offset past the current file size.
//
// There is a fair bit of overlap between FailedPrecondition and
// OutOfRange. We recommend using OutOfRange (the more specific error)
// when it applies so that callers who are iterating through a space can
// easily look for an OutOfRange error to detect when they are done.
OutOfRange
// Unimplemented is returned when an operation is not implemented or not
// supported/enabled in this service.
Unimplemented
// Internal indicates an internal error. Means some invariants expected by underlying System has
// been broken. If you see one of these errors, Something is very broken.
Internal
// Unavailable indicates the service is currently unavailable. This is a most likely a transient
// condition and may be corrected by retrying with a backoff.
//
// See litmus test above for deciding between FailedPrecondition, Aborted,
// and Unavailable.
Unavailable
// DataLoss indicates unrecoverable data loss or corruption.
DataLoss
)
// FromHTTPStatus converts a HTTP Status code to a StatusCode
func FromHTTPStatus(HTTPCode int) StatusCode {
return StatusCode(js.Global.Get("grpc").Get("web").Get("StatusCode").Call("fromHttpStatus", HTTPCode).Int())
}