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Configuring Preflight Requests for Cross-origin Access

Last updated: 2022-01-23 14:39:50

    Overview

    This document provides an overview of APIs and SDK code samples related to CORS preflight requests.

    API Operation Description
    Options Object Configuring a preflight request for cross-origin access Sends a preflight request to check whether a real cross-origin access request can be sent

    SDK API References

    For the parameters and method descriptions of all the APIs in the SDK, see SDK API Reference.

    Configuring a Preflight Request for Cross-origin Access

    Description

    This API is used to get the cross-origin access configuration for a preflight request.

    Sample code

    // Bucket name in the format of BucketName-APPID (APPID is required), which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    String bucket = "examplebucket-1250000000";
    String cosPath = "exampleobject"; // The location identifier of the object in the bucket, i.e., the object key
    String origin = "https://cloud.tencent.com";
    String accessMethod = "PUT";
    OptionObjectRequest optionObjectRequest = new OptionObjectRequest(bucket,
           cosPath, origin,
           accessMethod);
    cosXmlService.optionObjectAsync(optionObjectRequest,
           new CosXmlResultListener() {
       @Override
       public void onSuccess(CosXmlRequest cosXmlRequest, CosXmlResult result) {
           OptionObjectResult optionObjectResult = (OptionObjectResult) result;
       }
        // If you use the Kotlin language to call this, please note that the exception in the callback method is nullable; otherwise, the onFail method will not be called back, that is:
       // clientException is of type CosXmlClientException? and serviceException is of type CosXmlServiceException?
       @Override
       public void onFail(CosXmlRequest cosXmlRequest,
                          @Nullable CosXmlClientException clientException,
                          @Nullable CosXmlServiceException serviceException) {
           if (clientException != null) {
               clientException.printStackTrace();
           } else {
               serviceException.printStackTrace();
           }
       }
    });
    
    Note:

    For more samples, please visit GitHub.

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