91 lines
1.7 KiB
Go
91 lines
1.7 KiB
Go
package reddit
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import (
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"net/http"
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"time"
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"golang.org/x/net/context"
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"golang.org/x/oauth2"
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"golang.org/x/oauth2/clientcredentials"
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)
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var oauthScopes = []string{
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"identity",
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"read",
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"privatemessages",
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"submit",
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"history",
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}
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type appClient struct {
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baseClient
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cfg clientConfig
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cli *http.Client
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expiry time.Time
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}
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func (a *appClient) Do(req *http.Request) ([]byte, error) {
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if time.Until(a.expiry) < time.Minute*5 {
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if err := a.authorize(); err != nil {
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return nil, err
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}
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}
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return a.baseClient.Do(req)
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}
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func (a *appClient) authorize() error {
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ctx := context.WithValue(oauth2.NoContext, oauth2.HTTPClient, a.cli)
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if a.cfg.app.Username == "" || a.cfg.app.Password == "" {
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a.baseClient.cli = a.clientCredentialsClient(ctx)
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return nil
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}
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cfg := &oauth2.Config{
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ClientID: a.cfg.app.ID,
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ClientSecret: a.cfg.app.Secret,
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Endpoint: oauth2.Endpoint{TokenURL: a.cfg.app.tokenURL},
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Scopes: oauthScopes,
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}
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token, err := cfg.PasswordCredentialsToken(
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ctx,
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a.cfg.app.Username,
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a.cfg.app.Password,
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)
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if err != nil {
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return err
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}
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a.baseClient.cli = cfg.Client(ctx, token)
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a.expiry = token.Expiry
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return err
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}
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func (a *appClient) clientCredentialsClient(ctx context.Context) *http.Client {
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cfg := &clientcredentials.Config{
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ClientID: a.cfg.app.ID,
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ClientSecret: a.cfg.app.Secret,
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TokenURL: a.cfg.app.tokenURL,
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Scopes: oauthScopes,
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}
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return cfg.Client(ctx)
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}
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func newAppClient(c clientConfig) (*appClient, error) {
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var client *http.Client
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if c.client == nil {
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client = clientWithAgent(c.agent)
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} else {
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client = patchWithAgent(c.client, c.agent)
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}
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a := &appClient{
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cli: client,
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cfg: c,
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}
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return a, a.authorize()
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}
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