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login.go
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login.go
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package sdk
import (
"context"
"errors"
"net/http"
"strings"
"time"
)
type LoginRedeemCodeResponse struct {
TokenType string `json:"token_type"`
ExpiresIn int `json:"expires_in"`
Scope string `json:"scope"`
AccessToken string `json:"access_token"`
RefreshToken string `json:"refresh_token"`
}
const (
loginHTMLResponseHeader = "<!doctype html>" +
"<html>" +
"<head>" +
"<title>OneDrive Uploader</title>" +
"</head>" +
"<body>" +
"<h1>OneDrive Uploader</h1>"
loginHTMLResponseFooter = "</body></html>"
loginHTMLResponseOK = "<p>Received authorization code from Microsoft Graph API.</p>" +
"<p>Please return to your terminal now.</p>"
loginHTMLResponseNotFound = "<p>Error: Page not found.</p>"
)
func (client *Client) Login() error {
code := client.expectCode()
grant, err := client.redeemCodeForAccessToken(code)
if err != nil {
return err
}
if grant.AccessToken == "" {
return errors.New("received empty access token")
}
return nil
}
func (client *Client) UpdateSecretStore(grant *LoginRedeemCodeResponse) error {
expiry := time.Now().Add(time.Second * time.Duration(grant.ExpiresIn))
client.Config.AccessToken = grant.AccessToken
client.Config.RefreshToken = grant.RefreshToken
client.Config.Expiry = expiry
return client.Config.Write()
}
func (client *Client) GetLoginURL() string {
params := make(HTTPRequestParams)
params["client_id"] = client.Config.ClientID
params["scope"] = strings.Join(client.Config.Scopes, " ")
params["response_type"] = "code"
params["redirect_uri"] = client.Config.RedirectURL
uri := client.buildURI("https://login.microsoftonline.com/common/oauth2/v2.0/authorize", params)
return uri
}
func (client *Client) redeemCodeForAccessToken(code string) (*LoginRedeemCodeResponse, error) {
params := make(HTTPRequestParams)
params["client_id"] = client.Config.ClientID
params["redirect_uri"] = client.Config.RedirectURL
params["client_secret"] = client.Config.ClientSecret
params["code"] = code
params["grant_type"] = "authorization_code"
status, resp, err := client.httpPostForm("https://login.microsoftonline.com/common/oauth2/v2.0/token", params)
if err != nil {
return nil, err
}
if status != http.StatusOK {
if status == http.StatusUnauthorized {
return nil, errors.New("verify you're using the client secret's value (not ID) and the API permissions are set correctly")
}
return nil, client.handleResponseError(status, resp)
}
var json LoginRedeemCodeResponse
if err := UnmarshalJSON(&json, resp); err != nil {
return nil, err
}
client.UpdateSecretStore(&json)
return &json, nil
}
func (client *Client) ShouldRenewAccessToken() bool {
now := time.Now()
diff := now.Sub(client.Config.Expiry)
return diff.Minutes() > -30
}
func (client *Client) RenewAccessToken() (*LoginRedeemCodeResponse, error) {
params := make(HTTPRequestParams)
params["client_id"] = client.Config.ClientID
params["redirect_uri"] = client.Config.RedirectURL
params["client_secret"] = client.Config.ClientSecret
params["refresh_token"] = client.Config.RefreshToken
params["grant_type"] = "refresh_token"
status, resp, err := client.httpPostForm("https://login.microsoftonline.com/common/oauth2/v2.0/token", params)
if err != nil {
return nil, err
}
if status != http.StatusOK {
return nil, client.handleResponseError(status, resp)
}
var json LoginRedeemCodeResponse
if err := UnmarshalJSON(&json, resp); err != nil {
return nil, err
}
client.UpdateSecretStore(&json)
return &json, nil
}
func (client *Client) expectCode() string {
httpServer := &http.Server{
Addr: "0.0.0.0:53682",
WriteTimeout: time.Second * 15,
ReadTimeout: time.Second * 15,
IdleTimeout: time.Second * 60,
}
ctx, cancel := context.WithCancel(context.Background())
code := ""
var handleCall = func(w http.ResponseWriter, r *http.Request) {
s := r.URL.Query().Get("code")
if s != "" {
html := loginHTMLResponseHeader + loginHTMLResponseOK + loginHTMLResponseFooter
w.Header().Set("Content-Type", "text/html")
w.WriteHeader(http.StatusOK)
w.Write([]byte(html))
if f, ok := w.(http.Flusher); ok {
f.Flush()
}
code = s
cancel()
} else {
html := loginHTMLResponseHeader + loginHTMLResponseNotFound + loginHTMLResponseFooter
w.Header().Set("Content-Type", "text/html")
w.WriteHeader(http.StatusNotFound)
w.Write([]byte(html))
}
}
http.HandleFunc("/", handleCall)
go func() error {
return httpServer.ListenAndServe()
}()
<-ctx.Done()
httpServer.Shutdown(context.Background())
return code
}