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Documentation
¶
Overview ¶
`grpc_recovery` are interceptors that recover from gRPC handler panics.
Server Side Recovery Middleware ¶
By default a panic will be converted into a gRPC error with `code.Internal`.
Handling can be customised by providing an alternate recovery function.
Please see examples for simple examples of use.
Example (Initialization) ¶
Initialization shows an initialization sequence with a custom recovery handler func.
package main
import (
"github.com/grpc-ecosystem/go-grpc-middleware"
"github.com/grpc-ecosystem/go-grpc-middleware/recovery"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
var (
customFunc grpc_recovery.RecoveryHandlerFunc
)
// Initialization shows an initialization sequence with a custom recovery handler func.
func main() {
// Define customfunc to handle panic
customFunc = func(p interface{}) (err error) {
return status.Errorf(codes.Unknown, "panic triggered: %v", p)
}
// Shared options for the logger, with a custom gRPC code to log level function.
opts := []grpc_recovery.Option{
grpc_recovery.WithRecoveryHandler(customFunc),
}
// Create a server. Recovery handlers should typically be last in the chain so that other middleware
// (e.g. logging) can operate on the recovered state instead of being directly affected by any panic
_ = grpc.NewServer(
grpc_middleware.WithUnaryServerChain(
grpc_recovery.UnaryServerInterceptor(opts...),
),
grpc_middleware.WithStreamServerChain(
grpc_recovery.StreamServerInterceptor(opts...),
),
)
}
Output:
Index ¶
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func StreamServerInterceptor ¶
func StreamServerInterceptor(opts ...Option) grpc.StreamServerInterceptor
StreamServerInterceptor returns a new streaming server interceptor for panic recovery.
func UnaryServerInterceptor ¶
func UnaryServerInterceptor(opts ...Option) grpc.UnaryServerInterceptor
UnaryServerInterceptor returns a new unary server interceptor for panic recovery.
Types ¶
type Option ¶
type Option func(*options)
func WithRecoveryHandler ¶
func WithRecoveryHandler(f RecoveryHandlerFunc) Option
WithRecoveryHandler customizes the function for recovering from a panic.
func WithRecoveryHandlerContext ¶ added in v1.1.0
func WithRecoveryHandlerContext(f RecoveryHandlerFuncContext) Option
WithRecoveryHandlerContext customizes the function for recovering from a panic.
type RecoveryHandlerFunc ¶
type RecoveryHandlerFunc func(p interface{}) (err error)
RecoveryHandlerFunc is a function that recovers from the panic `p` by returning an `error`.
type RecoveryHandlerFuncContext ¶ added in v1.1.0
RecoveryHandlerFuncContext is a function that recovers from the panic `p` by returning an `error`. The context can be used to extract request scoped metadata and context values.
Source Files