也可以將清單宣告為 `"*"`（「wildcard」萬用字元），表示全部都允許。

但那只會允許某些類型的通訊，凡是涉及憑證（credentials）的都會被排除：例如 Cookie、Authorization 標頭（像 Bearer Token 會用到的）等。

因此，為了讓一切正常運作，最好明確指定被允許的來源。

## 使用 `CORSMiddleware` { #use-corsmiddleware }

你可以在 **FastAPI** 應用程式中使用 `CORSMiddleware` 來設定：

* 匯入 `CORSMiddleware`。
* 建立允許的來源清單（字串）。
* 將它加入到你的 **FastAPI** 應用程式做為「中介軟體（middleware）」。

你也可以指定你的後端是否允許：

* 憑證（credentials，例如 Authorization 標頭、Cookie 等）。

	bootstrapTrace("handleKMSConfig", handleKMSConfig)

	// Load the root credentials from the shell environment or from
	// the config file if not defined, set the default one.
	bootstrapTrace("rootCredentials", func() {
		cred := loadRootCredentials()
		if !cred.IsValid() && (env.Get(api.EnvAPIRootAccess, config.EnableOn) == config.EnableOff) {
			// Generate KMS based credentials if root access is disabled
			// and no ENV is set.

http://localhost:8000/v1/agents/multivac
```

Obwohl der Host der bösartigen Website und der lokalen App unterschiedlich ist, löst der Browser keinen CORS-Preflight-Request aus, weil:

* sie ohne Authentifizierung läuft, es müssen keine Credentials gesendet werden.
* der Browser annimmt, dass kein JSON gesendet wird (wegen des fehlenden `Content-Type`-Headers).

$MINIO_ACCESSKEY_SECRETKEY_TMP) > /dev/null 2>&1) return $? } # createUser ($policy) createUser() { POLICY=$1 #check accessKey_and_secretKey_tmp file if [[ ! -f $MINIO_ACCESSKEY_SECRETKEY_TMP ]];then echo "credentials file does not exist" return 1 fi if [[ $(cat $MINIO_ACCESSKEY_SECRETKEY_TMP|wc -l) -ne 2 ]];then echo "credentials file is invalid" rm -f $MINIO_ACCESSKEY_SECRETKEY_TMP return 1 fi USER=$(head -1 $MINIO_ACCESSKEY_SECRETKEY_TMP) # Create the user if it does not exist if ! checkUserExists ; then echo "Creating...

$MINIO_ACCESSKEY_SECRETKEY_TMP) > /dev/null 2>&1) return $? } # createUser ($policy) createUser() { POLICY=$1 #check accessKey_and_secretKey_tmp file if [[ ! -f $MINIO_ACCESSKEY_SECRETKEY_TMP ]];then echo "credentials file does not exist" return 1 fi if [[ $(cat $MINIO_ACCESSKEY_SECRETKEY_TMP|wc -l) -ne 2 ]];then echo "credentials file is invalid" rm -f $MINIO_ACCESSKEY_SECRETKEY_TMP return 1 fi USER=$(head -1 $MINIO_ACCESSKEY_SECRETKEY_TMP) # Create the user if it does not exist if ! checkUserExists ; then echo "Creating...

$MINIO_ACCESSKEY_SECRETKEY_TMP) > /dev/null 2>&1) return $? } # createUser ($policy) createUser() { POLICY=$1 #check accessKey_and_secretKey_tmp file if [[ ! -f $MINIO_ACCESSKEY_SECRETKEY_TMP ]];then echo "credentials file does not exist" return 1 fi if [[ $(cat $MINIO_ACCESSKEY_SECRETKEY_TMP|wc -l) -ne 2 ]];then echo "credentials file is invalid" rm -f $MINIO_ACCESSKEY_SECRETKEY_TMP return 1 fi USER=$(head -1 $MINIO_ACCESSKEY_SECRETKEY_TMP) # Create the user if it does not exist if ! checkUserExists ; then echo "Creating...

/dev/null 2>&1) return $? } # createSvcacct ($user) createSvcacct () { USER=$1 FILENAME=$2 #check accessKey_and_secretKey_tmp file if [[ ! -f $MINIO_ACCESSKEY_SECRETKEY_TMP ]];then echo "credentials file does not exist" return 1 fi if [[ $(cat $MINIO_ACCESSKEY_SECRETKEY_TMP|wc -l) -ne 2 ]];then echo "credentials file is invalid" rm -f $MINIO_ACCESSKEY_SECRETKEY_TMP return 1 fi SVCACCT=$(head -1 $MINIO_ACCESSKEY_SECRETKEY_TMP) # Create the svcacct if it does not exist if ! checkSvcacctExists ; then...

/dev/null 2>&1) return $? } # createSvcacct ($user) createSvcacct () { USER=$1 FILENAME=$2 #check accessKey_and_secretKey_tmp file if [[ ! -f $MINIO_ACCESSKEY_SECRETKEY_TMP ]];then echo "credentials file does not exist" return 1 fi if [[ $(cat $MINIO_ACCESSKEY_SECRETKEY_TMP|wc -l) -ne 2 ]];then echo "credentials file is invalid" rm -f $MINIO_ACCESSKEY_SECRETKEY_TMP return 1 fi SVCACCT=$(head -1 $MINIO_ACCESSKEY_SECRETKEY_TMP) # Create the svcacct if it does not exist if ! checkSvcacctExists ; then...

	globalBucketHTTPStats = newBucketHTTPStats()

	// Time when the server is started
	globalBootTime = UTCNow()

	globalActiveCred         auth.Credentials
	globalNodeAuthToken      string
	globalSiteReplicatorCred siteReplicatorCred

	// Captures if root credentials are set via ENV.
	globalCredViaEnv bool

	globalPublicCerts []*x509.Certificate

    boolean isStart = true;

    /**
     * Creates a DCERPC pipe handle with the specified URL and authentication
     * @param url the DCERPC URL specifying the endpoint
     * @param auth the NTLM authentication credentials
     * @throws UnknownHostException if the host cannot be resolved
     * @throws MalformedURLException if the URL is malformed
     * @throws DcerpcException if DCERPC initialization fails
     */