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Performing a Streaming Download
Updated on 2023-11-09 GMT+08:00
Performing a Streaming Download
Sample code:
static OBSClient *client; NSString *endPoint = @"your-endpoint"; // Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables AccessKeyID and SecretAccessKey. // Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html. char* ak_env = getenv("AccessKeyID"); char* sk_env = getenv("SecretAccessKey"); NSString *AK = [NSString stringWithUTF8String:ak_env]; NSString *SK = [NSString stringWithUTF8String:sk_env]; // Initialize identity authentication. OBSStaticCredentialProvider *credentialProvider = [[OBSStaticCredentialProvider alloc] initWithAccessKey:AK secretKey:SK]; //Initialize service configuration. OBSServiceConfiguration *conf = [[OBSServiceConfiguration alloc] initWithURLString:endPoint credentialProvider:credentialProvider]; // Initialize an instance of OBSClient. client = [[OBSClient alloc] initWithConfiguration:conf]; // Streaming download OBSGetObjectToDataRequest *request = [[OBSGetObjectToDataRequest alloc]initWithBucketName:@"bucketname" objectKey:@"objectname"]; //Query the download progress. request.downloadProgressBlock = ^(int64_t bytesWritten, int64_t totalBytesWritten, int64_t totalBytesExpectedToWrite) { NSLog(@"%0.1f%%",(float)(totalBytesWritten)*100/(float)totalBytesExpectedToWrite); }; // Receive downloaded data. __block NSMutableData *objectData = [NSMutableData new]; request.onReceiveDataBlock = ^(NSData *data) { [objectData appendData:data]; }; // Download result [client getObject:request completionHandler:^(OBSGetObjectResponse *response, NSError *error){ NSLog(@"%@",response); }] ; }
Parent topic: Object Download
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