286 lines
8.1 KiB
Go
286 lines
8.1 KiB
Go
package wrapper
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/micro/go-micro/v2/auth"
|
|
"github.com/micro/go-micro/v2/client"
|
|
"github.com/micro/go-micro/v2/debug/stats"
|
|
"github.com/micro/go-micro/v2/debug/trace"
|
|
"github.com/micro/go-micro/v2/errors"
|
|
"github.com/micro/go-micro/v2/metadata"
|
|
"github.com/micro/go-micro/v2/server"
|
|
"github.com/micro/go-micro/v2/util/config"
|
|
)
|
|
|
|
type fromServiceWrapper struct {
|
|
client.Client
|
|
|
|
// headers to inject
|
|
headers metadata.Metadata
|
|
}
|
|
|
|
var (
|
|
HeaderPrefix = "Micro-"
|
|
)
|
|
|
|
func (f *fromServiceWrapper) setHeaders(ctx context.Context) context.Context {
|
|
// don't overwrite keys
|
|
return metadata.MergeContext(ctx, f.headers, false)
|
|
}
|
|
|
|
func (f *fromServiceWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
|
|
ctx = f.setHeaders(ctx)
|
|
return f.Client.Call(ctx, req, rsp, opts...)
|
|
}
|
|
|
|
func (f *fromServiceWrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
|
|
ctx = f.setHeaders(ctx)
|
|
return f.Client.Stream(ctx, req, opts...)
|
|
}
|
|
|
|
func (f *fromServiceWrapper) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
|
|
ctx = f.setHeaders(ctx)
|
|
return f.Client.Publish(ctx, p, opts...)
|
|
}
|
|
|
|
// FromService wraps a client to inject service and auth metadata
|
|
func FromService(name string, c client.Client) client.Client {
|
|
return &fromServiceWrapper{
|
|
c,
|
|
metadata.Metadata{
|
|
HeaderPrefix + "From-Service": name,
|
|
},
|
|
}
|
|
}
|
|
|
|
// HandlerStats wraps a server handler to generate request/error stats
|
|
func HandlerStats(stats stats.Stats) server.HandlerWrapper {
|
|
// return a handler wrapper
|
|
return func(h server.HandlerFunc) server.HandlerFunc {
|
|
// return a function that returns a function
|
|
return func(ctx context.Context, req server.Request, rsp interface{}) error {
|
|
// execute the handler
|
|
err := h(ctx, req, rsp)
|
|
// record the stats
|
|
stats.Record(err)
|
|
// return the error
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
type traceWrapper struct {
|
|
client.Client
|
|
|
|
name string
|
|
trace trace.Tracer
|
|
}
|
|
|
|
func (c *traceWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
|
|
newCtx, s := c.trace.Start(ctx, req.Service()+"."+req.Endpoint())
|
|
|
|
s.Type = trace.SpanTypeRequestOutbound
|
|
err := c.Client.Call(newCtx, req, rsp, opts...)
|
|
if err != nil {
|
|
s.Metadata["error"] = err.Error()
|
|
}
|
|
|
|
// finish the trace
|
|
c.trace.Finish(s)
|
|
|
|
return err
|
|
}
|
|
|
|
// TraceCall is a call tracing wrapper
|
|
func TraceCall(name string, t trace.Tracer, c client.Client) client.Client {
|
|
return &traceWrapper{
|
|
name: name,
|
|
trace: t,
|
|
Client: c,
|
|
}
|
|
}
|
|
|
|
// TraceHandler wraps a server handler to perform tracing
|
|
func TraceHandler(t trace.Tracer) server.HandlerWrapper {
|
|
// return a handler wrapper
|
|
return func(h server.HandlerFunc) server.HandlerFunc {
|
|
// return a function that returns a function
|
|
return func(ctx context.Context, req server.Request, rsp interface{}) error {
|
|
// don't store traces for debug
|
|
if strings.HasPrefix(req.Endpoint(), "Debug.") {
|
|
return h(ctx, req, rsp)
|
|
}
|
|
|
|
// get the span
|
|
newCtx, s := t.Start(ctx, req.Service()+"."+req.Endpoint())
|
|
s.Type = trace.SpanTypeRequestInbound
|
|
|
|
err := h(newCtx, req, rsp)
|
|
if err != nil {
|
|
s.Metadata["error"] = err.Error()
|
|
}
|
|
|
|
// finish
|
|
t.Finish(s)
|
|
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
type authWrapper struct {
|
|
client.Client
|
|
name string
|
|
id string
|
|
auth func() auth.Auth
|
|
}
|
|
|
|
func (a *authWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
|
|
// parse the options
|
|
var options client.CallOptions
|
|
for _, o := range opts {
|
|
o(&options)
|
|
}
|
|
|
|
// check to see if the authorization header has already been set.
|
|
// We dont't override the header unless the ServiceToken option has
|
|
// been specified or the header wasn't provided
|
|
if _, ok := metadata.Get(ctx, "Authorization"); ok && !options.ServiceToken {
|
|
return a.Client.Call(ctx, req, rsp, opts...)
|
|
}
|
|
|
|
// if auth is nil we won't be able to get an access token, so we execute
|
|
// the request without one.
|
|
aa := a.auth()
|
|
if a == nil {
|
|
return a.Client.Call(ctx, req, rsp, opts...)
|
|
}
|
|
|
|
// performs the call with the authorization token provided
|
|
callWithToken := func(token string) error {
|
|
ctx := metadata.Set(ctx, "Authorization", auth.BearerScheme+token)
|
|
return a.Client.Call(ctx, req, rsp, opts...)
|
|
}
|
|
|
|
// check to see if we have a valid access token
|
|
aaOpts := aa.Options()
|
|
if aaOpts.Token != nil && aaOpts.Token.Expiry.Unix() > time.Now().Unix() {
|
|
return callWithToken(aaOpts.Token.AccessToken)
|
|
}
|
|
|
|
// if we have a refresh token we can use this to generate another access token
|
|
if aaOpts.Token != nil {
|
|
tok, err := aa.Token(auth.WithToken(aaOpts.Token.RefreshToken))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
aa.Init(auth.ClientToken(tok))
|
|
return callWithToken(tok.AccessToken)
|
|
}
|
|
|
|
// if we have credentials we can generate a new token for the account
|
|
if len(aaOpts.ID) > 0 && len(aaOpts.Secret) > 0 {
|
|
tok, err := aa.Token(auth.WithCredentials(aaOpts.ID, aaOpts.Secret))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
aa.Init(auth.ClientToken(tok))
|
|
return callWithToken(tok.AccessToken)
|
|
}
|
|
|
|
// check to see if a token was provided in config, this is normally used for
|
|
// setting the token when calling via the cli
|
|
if token, err := config.Get("micro", "auth", "token"); err == nil && len(token) > 0 {
|
|
return callWithToken(token)
|
|
}
|
|
|
|
// determine the type of service from the name. we do this so we can allocate
|
|
// different roles depending on the type of services. e.g. we don't want web
|
|
// services talking directly to the runtime. TODO: find a better way to determine
|
|
// the type of service
|
|
serviceType := "service"
|
|
if strings.Contains(a.name, "api") {
|
|
serviceType = "api"
|
|
} else if strings.Contains(a.name, "web") {
|
|
serviceType = "web"
|
|
}
|
|
|
|
// generate a new auth account for the service
|
|
name := fmt.Sprintf("%v-%v", a.name, a.id)
|
|
acc, err := aa.Generate(name, auth.WithNamespace(aaOpts.Namespace), auth.WithRoles(serviceType))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
token, err := aa.Token(auth.WithCredentials(acc.ID, acc.Secret))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
aa.Init(auth.ClientToken(token))
|
|
|
|
// use the token to execute the request
|
|
return callWithToken(token.AccessToken)
|
|
}
|
|
|
|
// AuthClient wraps requests with the auth header
|
|
func AuthClient(name string, id string, auth func() auth.Auth, c client.Client) client.Client {
|
|
return &authWrapper{c, name, id, auth}
|
|
}
|
|
|
|
// AuthHandler wraps a server handler to perform auth
|
|
func AuthHandler(fn func() auth.Auth) server.HandlerWrapper {
|
|
return func(h server.HandlerFunc) server.HandlerFunc {
|
|
return func(ctx context.Context, req server.Request, rsp interface{}) error {
|
|
// get the auth.Auth interface
|
|
a := fn()
|
|
|
|
// Check for debug endpoints which should be excluded from auth
|
|
if strings.HasPrefix(req.Endpoint(), "Debug.") {
|
|
return h(ctx, req, rsp)
|
|
}
|
|
|
|
// Extract the token if present. Note: if noop is being used
|
|
// then the token can be blank without erroring
|
|
var token string
|
|
if header, ok := metadata.Get(ctx, "Authorization"); ok {
|
|
// Ensure the correct scheme is being used
|
|
if !strings.HasPrefix(header, auth.BearerScheme) {
|
|
return errors.Unauthorized(req.Service(), "invalid authorization header. expected Bearer schema")
|
|
}
|
|
|
|
token = header[len(auth.BearerScheme):]
|
|
}
|
|
|
|
// Inspect the token and get the account
|
|
account, err := a.Inspect(token)
|
|
if err != nil {
|
|
account = &auth.Account{Namespace: a.Options().Namespace}
|
|
}
|
|
|
|
// construct the resource
|
|
res := &auth.Resource{
|
|
Type: "service",
|
|
Name: req.Service(),
|
|
Endpoint: req.Endpoint(),
|
|
}
|
|
|
|
// Verify the caller has access to the resource
|
|
err = a.Verify(account, res)
|
|
if err != nil && len(account.ID) > 0 {
|
|
return errors.Forbidden(req.Service(), "Forbidden call made to %v:%v by %v", req.Service(), req.Endpoint(), account.ID)
|
|
} else if err != nil {
|
|
return errors.Unauthorized(req.Service(), "Unauthorised call made to %v:%v", req.Service(), req.Endpoint())
|
|
}
|
|
|
|
// There is an account, set it in the context
|
|
ctx = auth.ContextWithAccount(ctx, account)
|
|
|
|
// The user is authorised, allow the call
|
|
return h(ctx, req, rsp)
|
|
}
|
|
}
|
|
}
|