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Amazon Simple Storage Service (S3) is one of the earliest cloud services launched by AWS. After many years of development, the S3 protocol has become a de facto standard in the object storage field. Tencent Cloud Object Storage (COS) provides an S3-compatible implementation scheme, so you can directly use the COS service in most S3-compatible applications. This document describes how to configure such applications to use COS.

Prerequisites

Checking whether the application can use COS

• An application with S3 Compatible in its description can use COS in most cases. If you find that some of its features cannot work properly, contact us for assistance, and be sure to indicate that you followed the steps in this document and provide information such as the application name and screenshots.
• If your application description only states that Amazon S3 is supported, it means that the application can use the S3 service, but whether it can use COS needs to be further evaluated in relevant configurations as detailed below.

Preparing COS service

Step 1. Sign up for a Tencent Cloud account

(If you already have a Tencent Cloud account, skip this step.)

Step 2. Verify your identity

(If you have already done so, skip this step.)

For more information on how to verify your identity, see Identity Verification Guide.

Step 3. Activate the COS service

Step 4. Prepare the APPID and access key

Get and note down the APPID, SecretId, and SecretKey on the API Key page in the CAM console.

Step 5. Create a bucket

Create a COS bucket as instructed in Creating a Bucket.

Some applications have a built-in process for creating buckets. If you want such applications to create buckets, skip this step.

Configuring COS Service in Application

Basic configuration

Most applications have similar configuration items for using a storage service. The common names and descriptions of these configuration items are as listed below:

Note：

If you have any questions during the configuration, contact us for assistance, and be sure to indicate that you followed the steps in this document and provide information such as the application name and screenshots.

Other advanced configuration items

In addition to the above basic configuration items, some applications have other advanced configuration items. The following describes some COS features for you to better use COS in such applications.

• Service port and protocol
  COS supports both HTTP and HTTPS protocols, with the default ports 80 and 443 used by default. For security considerations, we recommend you use COS over the HTTPS protocol preferably.
• Path-Style and Virtual Hosted-Style
  COS supports both styles.
• AWS v2 and AWS v4 signatures
  COS supports both signature formats.

Summary

COS does not guarantee full compatibility with S3. If you have any questions when using COS in your application, contact us for assistance, and be sure to indicate that you followed the steps in this document and provide information such as the application name and screenshots.