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Configuring Preflight Requests for Cross-origin Access

Last updated: 2024-06-25 10:53:13

    Overview

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