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58 lines
1.8 KiB
Go
58 lines
1.8 KiB
Go
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package autorest
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import (
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"fmt"
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"net/http"
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"github.com/Azure/go-autorest/autorest/adal"
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)
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// Authorizer is the interface that provides a PrepareDecorator used to supply request
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// authorization. Most often, the Authorizer decorator runs last so it has access to the full
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// state of the formed HTTP request.
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type Authorizer interface {
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WithAuthorization() PrepareDecorator
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}
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// NullAuthorizer implements a default, "do nothing" Authorizer.
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type NullAuthorizer struct{}
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// WithAuthorization returns a PrepareDecorator that does nothing.
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func (na NullAuthorizer) WithAuthorization() PrepareDecorator {
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return WithNothing()
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}
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// BearerAuthorizer implements the bearer authorization
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type BearerAuthorizer struct {
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tokenProvider adal.OAuthTokenProvider
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}
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// NewBearerAuthorizer crates a BearerAuthorizer using the given token provider
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func NewBearerAuthorizer(tp adal.OAuthTokenProvider) *BearerAuthorizer {
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return &BearerAuthorizer{tokenProvider: tp}
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}
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func (ba *BearerAuthorizer) withBearerAuthorization() PrepareDecorator {
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return WithHeader(headerAuthorization, fmt.Sprintf("Bearer %s", ba.tokenProvider.OAuthToken()))
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}
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// WithAuthorization returns a PrepareDecorator that adds an HTTP Authorization header whose
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// value is "Bearer " followed by the token.
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//
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// By default, the token will be automatically refreshed through the Refresher interface.
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func (ba *BearerAuthorizer) WithAuthorization() PrepareDecorator {
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return func(p Preparer) Preparer {
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return PreparerFunc(func(r *http.Request) (*http.Request, error) {
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refresher, ok := ba.tokenProvider.(adal.Refresher)
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if ok {
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err := refresher.EnsureFresh()
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if err != nil {
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return r, NewErrorWithError(err, "azure.BearerAuthorizer", "WithAuthorization", nil,
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"Failed to refresh the Token for request to %s", r.URL)
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}
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}
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return (ba.withBearerAuthorization()(p)).Prepare(r)
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})
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}
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}
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