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(C#) Generate an AWS (S3) Pre-Signed URL using Signature V4Demonstrates how to generate a pre-signed URL using AWS Signature Version 4. This example generates a pre-signed URL for the Amazon S3 service. Note: this example requires Chilkat v9.5.0.66 or greater.
// This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Note: This example requires Chilkat v9.5.0.66 or greater. Chilkat.Http http = new Chilkat.Http(); http.AwsAccessKey = "AWS_ACCESS_KEY"; http.AwsSecretKey = "AWS_SECRET_KEY"; // Make sure to set your AWS region correctly http.AwsRegion = "us-east-1"; string bucketName = "chilkat100"; string objectName = "starfish/starfish.jpg"; string localFilePath = "qa_output/starfish.jpg"; string awsService = "s3"; // The signed URL will be valid for this number of seconds: int numSecondsValid = 86400; // Choose between a URL beginning with "http://" or "https://"... bool bUseHttps = false; // Generate the pre-signed URL string preSignedUrl = http.S3_GenerateUrlV4(bUseHttps,bucketName,objectName,numSecondsValid,awsService); if (http.LastMethodSuccess != true) { Debug.WriteLine(http.LastErrorText); return; } // The following URL can be copy-and-pasted into a browser.. Debug.WriteLine("Pre-Signed AWS S3 URL: " + preSignedUrl); // Here's an example of a pre-signed URL. // This URL will only work within 1 day (86400 seconds) after the time this example was published. // // http://chilkat100.s3.amazonaws.com/starfish/starfish.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=16QXXDGY83AJJR6RVQ02%2F20170111%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20170111T161959Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=72bf4fd9a15d7bbcdd313a3318d937a778905f62a3fbff9b789d8dc28acd9232 // Now try to do an HTTP Download using the signed URL. bool success = http.Download(preSignedUrl,"qa_output/starfish.jpg"); if (success != true) { Debug.WriteLine(http.LastErrorText); } else { Debug.WriteLine("Success."); } |
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