Overview

This document provides an overview of APIs and SDK sample codes related to preflight requests for cross-origin access.

SDK API Reference

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

Configuring a Preflight Request for Cross-origin Access

Feature description

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

Sample code

Objective-C

objective-c
QCloudOptionsObjectRequest* request = [[QCloudOptionsObjectRequest alloc] init];
// Bucket name in the format: `BucketName-APPID`
request.bucket =@"examplebucket-1250000000";
// Specify the domain the request that simuplates CORS comes from, request method and host
request.origin = @"http://cloud.tencent.com";
request.accessControlRequestMethod = @"GET";
request.accessControlRequestHeaders = @"host";
// Object key, i.e. the full path of a COS object. If the object is in a directory, the path should be "video/xxx/movie.mp4"
request.object = @"exampleobject";
[request setFinishBlock:^(id outputObject, NSError* error) {
   // outputObject returns information such as the Etag or custom headers
   NSDictionary* info = (NSDictionary *) outputObject;

}];
[[QCloudCOSXMLService defaultCOSXML] OptionsObject:request];

Note：

For more samples, please visit GitHub.

Swift

swift
let optionsObject = QCloudOptionsObjectRequest.init();
// Object key, i.e. the full path of a COS object. If the object is in a directory, the path should be "video/xxx/movie.mp4"
optionsObject.object = "exampleobject";
// Specify the domain the request that simuplates CORS comes from, request method and header
optionsObject.origin = "http://www.qcloud.com";
optionsObject.accessControlRequestMethod = "GET";
optionsObject.accessControlRequestHeaders = "origin";
// Bucket name in the format: `BucketName-APPID`
optionsObject.bucket = "examplebucket-1250000000";
optionsObject.finishBlock = {(result,error) in

 if let result = result {
      // “result" contains headers returned by the server
   }
}
QCloudCOSXMLService.defaultCOSXML().optionsObject(optionsObject);

Note：

For more samples, please visit GitHub.