- Release Notes and Announcements
- Release Notes
- Announcements
- Notification on Service Suspension Policy Change in Case of Overdue Payment for COS Pay-As-You-Go (Postpaid)
- Implementation Notice for Security Management of COS Bucket Domain (Effective January 2024)
- Notification of Price Reduction for COS Retrieval and Storage Capacity Charges
- Daily Billing for COS Storage Usage, Request, and Data Retrieval
- COS Will Stop Supporting New Default CDN Acceleration Domains
- Product Introduction
- Purchase Guide
- Getting Started
- Console Guide
- Console Overview
- Bucket Management
- Bucket Overview
- Creating Bucket
- Deleting Buckets
- Querying Bucket
- Clearing Bucket
- Setting Access Permission
- Setting Bucket Encryption
- Setting Hotlink Protection
- Setting Origin-Pull
- Setting Cross-Origin Resource Sharing (CORS)
- Setting Versioning
- Setting Static Website
- Setting Lifecycle
- Setting Logging
- Accessing Bucket List Using Sub-Account
- Adding Bucket Policies
- Setting Log Analysis
- Setting INTELLIGENT TIERING
- Setting Inventory
- Domain Name Management
- Setting Bucket Tags
- Setting Log Retrieval
- Setting Cross-Bucket Replication
- Enabling Global Acceleration
- Setting Object Lock
- Object Management
- Uploading an Object
- Downloading Objects
- Copying Object
- Previewing or Editing Object
- Viewing Object Information
- Searching for Objects
- Sorting and Filtering Objects
- Direct Upload to ARCHIVE
- Modifying Storage Class
- Deleting Incomplete Multipart Uploads
- Setting Object Access Permission
- Setting Object Encryption
- Custom Headers
- Deleting Objects
- Restoring Archived Objects
- Folder Management
- Data Extraction
- Setting Object Tag
- Exporting Object URLs
- Restoring Historical Object Version
- Batch Operation
- Monitoring Reports
- Data Processing
- Content Moderation
- Smart Toolbox User Guide
- Data Processing Workflow
- Application Integration
- User Tools
- Tool Overview
- Installation and Configuration of Environment
- COSBrowser
- COSCLI (Beta)
- COSCLI Overview
- Download and Installation Configuration
- Common Options
- Common Commands
- Generating and Modifying Configuration Files - config
- Creating Buckets - mb
- Deleting Buckets - rb
- Tagging Bucket - bucket-tagging
- Querying Bucket/Object List - ls
- Obtaining Statistics on Different Types of Objects - du
- Uploading/Downloading/Copying Objects - cp
- Syncing Upload/Download/Copy - sync
- Deleting Objects - rm
- Getting File Hash Value - hash
- Listing Incomplete Multipart Uploads - lsparts
- Clearing Incomplete Multipart Uploads - abort
- Retrieving Archived Files - restore
- Creating/Obtaining a Symbolic Link - symlink
- Viewing Contents of an Object - cat
- Getting Pre-signed URL - signurl
- Listing Contents and Statistics Under a Directory - lsdu
- FAQs
- COSCMD
- COS Migration
- FTP Server
- Hadoop
- COSDistCp
- Hadoop-cos-DistChecker
- HDFS TO COS
- Online Auxiliary Tools
- Diagnostic Tool
- Practical Tutorial
- Overview
- Access Control and Permission Management
- ACL Practices
- CAM Practices
- Granting Sub-Accounts Access to COS
- Authorization Cases
- Working with COS API Authorization Policies
- Security Guidelines for Using Temporary Credentials for Direct Upload from Frontend to COS
- Generating and Using Temporary Keys
- Authorizing Sub-Account to Get Buckets by Tag
- Descriptions and Use Cases of Condition Keys
- Granting Bucket Permissions to a Sub-Account that is Under Another Root Account
- Performance Optimization
- Data Migration
- Accessing COS with AWS S3 SDK
- Data Disaster Recovery and Backup
- Domain Name Management Practice
- Image Processing
- Audio/Video Practices
- Workflow
- Direct Data Upload
- Content Moderation
- Data Security
- Data Verification
- Big Data Practice
- Using COS in the Third-party Applications
- Use the general configuration of COS in third-party applications compatible with S3
- Storing Remote WordPress Attachments to COS
- Storing Ghost Attachment to COS
- Backing up Files from PC to COS
- Using Nextcloud and COS to Build Personal Online File Storage Service
- Mounting COS to Windows Server as Local Drive
- Setting up Image Hosting Service with PicGo, Typora, and COS
- Managing COS Resource with CloudBerry Explorer
- Developer Guide
- Creating Request
- Bucket
- Object
- Data Management
- Data Disaster Recovery
- Data Security
- Cloud Access Management
- Batch Operation
- Global Acceleration
- Data Workflow
- Monitoring and Alarms
- Data Lake Storage
- Cloud Native Datalake Storage
- Metadata Accelerator
- Metadata Acceleration Overview
- Migrating HDFS Data to Metadata Acceleration-Enabled Bucket
- Using HDFS to Access Metadata Acceleration-Enabled Bucket
- Mounting a COS Bucket in a Computing Cluster
- Accessing COS over HDFS in CDH Cluster
- Using Hadoop FileSystem API Code to Access COS Metadata Acceleration Bucket
- Using DataX to Sync Data Between Buckets with Metadata Acceleration Enabled
- Big Data Security
- GooseFS
- Data Processing
- Troubleshooting
- API Documentation
- Introduction
- Common Request Headers
- Common Response Headers
- Error Codes
- Request Signature
- Action List
- Service APIs
- Bucket APIs
- Basic Operations
- Access Control List (acl)
- Cross-Origin Resource Sharing (cors)
- Lifecycle
- Bucket Policy (policy)
- Hotlink Protection (referer)
- Tag (tagging)
- Static Website (website)
- Intelligent Tiering
- Bucket inventory(inventory)
- Versioning
- Cross-Bucket Replication（replication）
- Log Management(logging)
- Global Acceleration (Accelerate)
- Bucket Encryption (encryption)
- Custom Domain Name (Domain)
- Origin-Pull (Origin)
- Object APIs
- Batch Operation APIs
- Data Processing APIs
- Image Processing
- Basic Image Processing
- Scaling
- Cropping
- Rotation
- Converting Format
- Quality Change
- Gaussian Blurring
- Adjusting Brightness
- Adjusting Contrast
- Sharpening
- Grayscale Image
- Image Watermark
- Text Watermark
- Obtaining Basic Image Information
- Getting Image EXIF
- Obtaining Image’s Average Hue
- Metadata Removal
- Quick Thumbnail Template
- Limiting Output Image Size
- Pipeline Operators
- Image Advanced Compression
- Persistent Image Processing
- Image Compression
- Blind Watermark
- Basic Image Processing
- AI-Based Content Recognition
- Media Processing
- File Processing
- File Processing
- Image Processing
- Job and Workflow
- Common Request Headers
- Common Response Headers
- Error Codes
- Workflow APIs
- Workflow Instance
- Job APIs
- Media Processing
- Canceling Media Processing Job
- Querying Media Processing Job
- Media Processing Job Callback
- Video-to-Animated Image Conversion
- Audio/Video Splicing
- Adding Digital Watermark
- Extracting Digital Watermark
- Getting Media Information
- Noise Cancellation
- Video Quality Scoring
- SDRtoHDR
- Remuxing (Audio/Video Segmentation)
- Intelligent Thumbnail
- Frame Capturing
- Stream Separation
- Super Resolution
- Audio/Video Transcoding
- Text to Speech
- Video Montage
- Video Enhancement
- Video Tagging
- Voice/Sound Separation
- Image Processing
- Multi-Job Processing
- AI-Based Content Recognition
- Sync Media Processing
- Media Processing
- Template APIs
- Media Processing
- Creating Media Processing Template
- Creating Animated Image Template
- Creating Splicing Template
- Creating Top Speed Codec Transcoding Template
- Creating Screenshot Template
- Creating Super Resolution Template
- Creating Audio/Video Transcoding Template
- Creating Professional Transcoding Template
- Creating Text-to-Speech Template
- Creating Video Montage Template
- Creating Video Enhancement Template
- Creating Voice/Sound Separation Template
- Creating Watermark Template
- Creating Intelligent Thumbnail Template
- Deleting Media Processing Template
- Querying Media Processing Template
- Updating Media Processing Template
- Updating Animated Image Template
- Updating Splicing Template
- Updating Top Speed Codec Transcoding Template
- Updating Screenshot Template
- Updating Super Resolution Template
- Updating Audio/Video Transcoding Template
- Updating Professional Transcoding Template
- Updating Text-to-Speech Template
- Updating Video Montage Template
- Updating Video Enhancement Template
- Updating Voice/Sound Separation Template
- Updating Watermark Template
- Updating Intelligent Thumbnail Template
- Creating Media Processing Template
- AI-Based Content Recognition
- Media Processing
- Batch Job APIs
- Callback Content
- Appendix
- Content Moderation APIs
- Submitting Virus Detection Job
- SDK Documentation
- SDK Overview
- Preparations
- Android SDK
- Getting Started
- Android SDK FAQs
- Quick Experience
- Bucket Operations
- Object Operations
- Uploading an Object
- Downloading Objects
- Copying and Moving Objects
- Listing Objects
- Deleting Objects
- Restoring Archived Objects
- Querying Object Metadata
- Generating Pre-Signed URLs
- Configuring Preflight Requests for Cross-origin Access
- Server-Side Encryption
- Single-Connection Bandwidth Limit
- Extracting Object Content
- Remote Disaster Recovery
- Data Management
- Cloud Access Management
- Data Verification
- Image Processing
- Setting Custom Headers
- Setting Access Domain Names (CDN/Global Acceleration)
- Troubleshooting
- C SDK
- C++ SDK
- .NET(C#) SDK
- Getting Started
- .NET (C#) SDK
- Bucket Operations
- Object Operations
- Uploading Objects
- Downloading Objects
- Copying and Moving Objects
- Listing Objects
- Deleting Objects
- Checking Whether Objects Exist
- Restoring Archived Objects
- Querying Object Metadata
- Object Access URL
- Getting Pre-Signed URLs
- Configuring Preflight Requests for Cross-Origin Access
- Server-Side Encryption
- Single-URL Speed Limits
- Extracting Object Content
- Cross-Region Disaster Recovery
- Data Management
- Cloud Access Management
- Image Processing
- Content Moderation
- Setting Custom Headers
- Setting Access Domain Names (CDN/Global Acceleration)
- Troubleshooting
- Backward Compatibility
- SDK for Flutter
- Go SDK
- iOS SDK
- Getting Started
- iOS SDK
- Quick Experience
- Bucket Operations
- Object Operations
- Uploading Objects
- Downloading Objects
- Listing Objects
- Copying and Moving Objects
- Extracting Object Content
- Checking Whether an Object Exists
- Deleting Objects
- Restoring Archived Objects
- Querying Object Metadata
- Server-Side Encryption
- Object Access URL
- Generating Pre-Signed URL
- Configuring CORS Preflight Requests
- Cross-region Disaster Recovery
- Data Management
- Cloud Access Management
- Image Processing
- Content Recognition
- Setting Custom Headers
- Setting Access Domain Names (CDN/Global Acceleration)
- Troubleshooting
- Java SDK
- Getting Started
- FAQs
- Bucket Operations
- Object Operations
- Uploading Object
- Downloading Objects
- Copying and Moving Objects
- Listing Objects
- Deleting Objects
- Checking Whether Objects Exist
- Querying Object Metadata
- Modifying Object Metadata
- Object Access URL
- Generating Pre-Signed URLs
- Restoring Archived Objects
- Server-Side Encryption
- Client-Side Encryption
- Single-URL Speed Limits
- Extracting Object Content
- Uploading/Downloading Object at Custom Domain Name
- Data Management
- Cross-Region Disaster Recovery
- Cloud Access Management
- Image Processing
- Content Moderation
- File Processing
- Media Processing
- AI-Based Content Recognition
- Troubleshooting
- Setting Access Domain Names (CDN/Global Acceleration)
- JavaScript SDK
- Node.js SDK
- PHP SDK
- Python SDK
- Getting Started
- Python SDK FAQs
- Bucket Operations
- Object Operations
- Uploading Objects
- Downloading Objects
- Copying and Moving Objects
- Listing Objects
- Deleting Objects
- Checking Whether Objects Exist
- Querying Object Metadata
- Modifying Object Metadata
- Object Access URL
- Getting Pre-Signed URLs
- Restoring Archived Objects
- Extracting Object Content
- Server-Side Encryption
- Client-Side Encryption
- Single-URL Speed Limits
- Cross-Region Disaster Recovery
- Data Management
- Cloud Access Management
- Content Recognition
- Setting Access Domain Names (CDN/Global Acceleration)
- Troubleshooting
- Image Processing
- React Native SDK
- Mini Program SDK
- Getting Started
- FAQs
- Bucket Operations
- Object Operations
- Uploading an Object
- Downloading Objects
- Listing Objects
- Deleting Objects
- Copying and Moving Objects
- Restoring Archived Objects
- Querying Object Metadata
- Checking Whether an Object Exists
- Object Access URL
- Generating Pre-Signed URL
- Configuring CORS Preflight Requests
- Single-URL Speed Limits
- Server-Side Encryption
- Remote disaster-tolerant
- Data Management
- Cloud Access Management
- Data Verification
- Content Moderation
- Setting Access Domain Names (CDN/Global Acceleration)
- Image Processing
- Troubleshooting
- Error Codes
- FAQs
- Related Agreements
- Appendices
- Glossary
- Release Notes and Announcements
- Release Notes
- Announcements
- Notification on Service Suspension Policy Change in Case of Overdue Payment for COS Pay-As-You-Go (Postpaid)
- Implementation Notice for Security Management of COS Bucket Domain (Effective January 2024)
- Notification of Price Reduction for COS Retrieval and Storage Capacity Charges
- Daily Billing for COS Storage Usage, Request, and Data Retrieval
- COS Will Stop Supporting New Default CDN Acceleration Domains
- Product Introduction
- Purchase Guide
- Getting Started
- Console Guide
- Console Overview
- Bucket Management
- Bucket Overview
- Creating Bucket
- Deleting Buckets
- Querying Bucket
- Clearing Bucket
- Setting Access Permission
- Setting Bucket Encryption
- Setting Hotlink Protection
- Setting Origin-Pull
- Setting Cross-Origin Resource Sharing (CORS)
- Setting Versioning
- Setting Static Website
- Setting Lifecycle
- Setting Logging
- Accessing Bucket List Using Sub-Account
- Adding Bucket Policies
- Setting Log Analysis
- Setting INTELLIGENT TIERING
- Setting Inventory
- Domain Name Management
- Setting Bucket Tags
- Setting Log Retrieval
- Setting Cross-Bucket Replication
- Enabling Global Acceleration
- Setting Object Lock
- Object Management
- Uploading an Object
- Downloading Objects
- Copying Object
- Previewing or Editing Object
- Viewing Object Information
- Searching for Objects
- Sorting and Filtering Objects
- Direct Upload to ARCHIVE
- Modifying Storage Class
- Deleting Incomplete Multipart Uploads
- Setting Object Access Permission
- Setting Object Encryption
- Custom Headers
- Deleting Objects
- Restoring Archived Objects
- Folder Management
- Data Extraction
- Setting Object Tag
- Exporting Object URLs
- Restoring Historical Object Version
- Batch Operation
- Monitoring Reports
- Data Processing
- Content Moderation
- Smart Toolbox User Guide
- Data Processing Workflow
- Application Integration
- User Tools
- Tool Overview
- Installation and Configuration of Environment
- COSBrowser
- COSCLI (Beta)
- COSCLI Overview
- Download and Installation Configuration
- Common Options
- Common Commands
- Generating and Modifying Configuration Files - config
- Creating Buckets - mb
- Deleting Buckets - rb
- Tagging Bucket - bucket-tagging
- Querying Bucket/Object List - ls
- Obtaining Statistics on Different Types of Objects - du
- Uploading/Downloading/Copying Objects - cp
- Syncing Upload/Download/Copy - sync
- Deleting Objects - rm
- Getting File Hash Value - hash
- Listing Incomplete Multipart Uploads - lsparts
- Clearing Incomplete Multipart Uploads - abort
- Retrieving Archived Files - restore
- Creating/Obtaining a Symbolic Link - symlink
- Viewing Contents of an Object - cat
- Getting Pre-signed URL - signurl
- Listing Contents and Statistics Under a Directory - lsdu
- FAQs
- COSCMD
- COS Migration
- FTP Server
- Hadoop
- COSDistCp
- Hadoop-cos-DistChecker
- HDFS TO COS
- Online Auxiliary Tools
- Diagnostic Tool
- Practical Tutorial
- Overview
- Access Control and Permission Management
- ACL Practices
- CAM Practices
- Granting Sub-Accounts Access to COS
- Authorization Cases
- Working with COS API Authorization Policies
- Security Guidelines for Using Temporary Credentials for Direct Upload from Frontend to COS
- Generating and Using Temporary Keys
- Authorizing Sub-Account to Get Buckets by Tag
- Descriptions and Use Cases of Condition Keys
- Granting Bucket Permissions to a Sub-Account that is Under Another Root Account
- Performance Optimization
- Data Migration
- Accessing COS with AWS S3 SDK
- Data Disaster Recovery and Backup
- Domain Name Management Practice
- Image Processing
- Audio/Video Practices
- Workflow
- Direct Data Upload
- Content Moderation
- Data Security
- Data Verification
- Big Data Practice
- Using COS in the Third-party Applications
- Use the general configuration of COS in third-party applications compatible with S3
- Storing Remote WordPress Attachments to COS
- Storing Ghost Attachment to COS
- Backing up Files from PC to COS
- Using Nextcloud and COS to Build Personal Online File Storage Service
- Mounting COS to Windows Server as Local Drive
- Setting up Image Hosting Service with PicGo, Typora, and COS
- Managing COS Resource with CloudBerry Explorer
- Developer Guide
- Creating Request
- Bucket
- Object
- Data Management
- Data Disaster Recovery
- Data Security
- Cloud Access Management
- Batch Operation
- Global Acceleration
- Data Workflow
- Monitoring and Alarms
- Data Lake Storage
- Cloud Native Datalake Storage
- Metadata Accelerator
- Metadata Acceleration Overview
- Migrating HDFS Data to Metadata Acceleration-Enabled Bucket
- Using HDFS to Access Metadata Acceleration-Enabled Bucket
- Mounting a COS Bucket in a Computing Cluster
- Accessing COS over HDFS in CDH Cluster
- Using Hadoop FileSystem API Code to Access COS Metadata Acceleration Bucket
- Using DataX to Sync Data Between Buckets with Metadata Acceleration Enabled
- Big Data Security
- GooseFS
- Data Processing
- Troubleshooting
- API Documentation
- Introduction
- Common Request Headers
- Common Response Headers
- Error Codes
- Request Signature
- Action List
- Service APIs
- Bucket APIs
- Basic Operations
- Access Control List (acl)
- Cross-Origin Resource Sharing (cors)
- Lifecycle
- Bucket Policy (policy)
- Hotlink Protection (referer)
- Tag (tagging)
- Static Website (website)
- Intelligent Tiering
- Bucket inventory(inventory)
- Versioning
- Cross-Bucket Replication（replication）
- Log Management(logging)
- Global Acceleration (Accelerate)
- Bucket Encryption (encryption)
- Custom Domain Name (Domain)
- Origin-Pull (Origin)
- Object APIs
- Batch Operation APIs
- Data Processing APIs
- Image Processing
- Basic Image Processing
- Scaling
- Cropping
- Rotation
- Converting Format
- Quality Change
- Gaussian Blurring
- Adjusting Brightness
- Adjusting Contrast
- Sharpening
- Grayscale Image
- Image Watermark
- Text Watermark
- Obtaining Basic Image Information
- Getting Image EXIF
- Obtaining Image’s Average Hue
- Metadata Removal
- Quick Thumbnail Template
- Limiting Output Image Size
- Pipeline Operators
- Image Advanced Compression
- Persistent Image Processing
- Image Compression
- Blind Watermark
- Basic Image Processing
- AI-Based Content Recognition
- Media Processing
- File Processing
- File Processing
- Image Processing
- Job and Workflow
- Common Request Headers
- Common Response Headers
- Error Codes
- Workflow APIs
- Workflow Instance
- Job APIs
- Media Processing
- Canceling Media Processing Job
- Querying Media Processing Job
- Media Processing Job Callback
- Video-to-Animated Image Conversion
- Audio/Video Splicing
- Adding Digital Watermark
- Extracting Digital Watermark
- Getting Media Information
- Noise Cancellation
- Video Quality Scoring
- SDRtoHDR
- Remuxing (Audio/Video Segmentation)
- Intelligent Thumbnail
- Frame Capturing
- Stream Separation
- Super Resolution
- Audio/Video Transcoding
- Text to Speech
- Video Montage
- Video Enhancement
- Video Tagging
- Voice/Sound Separation
- Image Processing
- Multi-Job Processing
- AI-Based Content Recognition
- Sync Media Processing
- Media Processing
- Template APIs
- Media Processing
- Creating Media Processing Template
- Creating Animated Image Template
- Creating Splicing Template
- Creating Top Speed Codec Transcoding Template
- Creating Screenshot Template
- Creating Super Resolution Template
- Creating Audio/Video Transcoding Template
- Creating Professional Transcoding Template
- Creating Text-to-Speech Template
- Creating Video Montage Template
- Creating Video Enhancement Template
- Creating Voice/Sound Separation Template
- Creating Watermark Template
- Creating Intelligent Thumbnail Template
- Deleting Media Processing Template
- Querying Media Processing Template
- Updating Media Processing Template
- Updating Animated Image Template
- Updating Splicing Template
- Updating Top Speed Codec Transcoding Template
- Updating Screenshot Template
- Updating Super Resolution Template
- Updating Audio/Video Transcoding Template
- Updating Professional Transcoding Template
- Updating Text-to-Speech Template
- Updating Video Montage Template
- Updating Video Enhancement Template
- Updating Voice/Sound Separation Template
- Updating Watermark Template
- Updating Intelligent Thumbnail Template
- Creating Media Processing Template
- AI-Based Content Recognition
- Media Processing
- Batch Job APIs
- Callback Content
- Appendix
- Content Moderation APIs
- Submitting Virus Detection Job
- SDK Documentation
- SDK Overview
- Preparations
- Android SDK
- Getting Started
- Android SDK FAQs
- Quick Experience
- Bucket Operations
- Object Operations
- Uploading an Object
- Downloading Objects
- Copying and Moving Objects
- Listing Objects
- Deleting Objects
- Restoring Archived Objects
- Querying Object Metadata
- Generating Pre-Signed URLs
- Configuring Preflight Requests for Cross-origin Access
- Server-Side Encryption
- Single-Connection Bandwidth Limit
- Extracting Object Content
- Remote Disaster Recovery
- Data Management
- Cloud Access Management
- Data Verification
- Image Processing
- Setting Custom Headers
- Setting Access Domain Names (CDN/Global Acceleration)
- Troubleshooting
- C SDK
- C++ SDK
- .NET(C#) SDK
- Getting Started
- .NET (C#) SDK
- Bucket Operations
- Object Operations
- Uploading Objects
- Downloading Objects
- Copying and Moving Objects
- Listing Objects
- Deleting Objects
- Checking Whether Objects Exist
- Restoring Archived Objects
- Querying Object Metadata
- Object Access URL
- Getting Pre-Signed URLs
- Configuring Preflight Requests for Cross-Origin Access
- Server-Side Encryption
- Single-URL Speed Limits
- Extracting Object Content
- Cross-Region Disaster Recovery
- Data Management
- Cloud Access Management
- Image Processing
- Content Moderation
- Setting Custom Headers
- Setting Access Domain Names (CDN/Global Acceleration)
- Troubleshooting
- Backward Compatibility
- SDK for Flutter
- Go SDK
- iOS SDK
- Getting Started
- iOS SDK
- Quick Experience
- Bucket Operations
- Object Operations
- Uploading Objects
- Downloading Objects
- Listing Objects
- Copying and Moving Objects
- Extracting Object Content
- Checking Whether an Object Exists
- Deleting Objects
- Restoring Archived Objects
- Querying Object Metadata
- Server-Side Encryption
- Object Access URL
- Generating Pre-Signed URL
- Configuring CORS Preflight Requests
- Cross-region Disaster Recovery
- Data Management
- Cloud Access Management
- Image Processing
- Content Recognition
- Setting Custom Headers
- Setting Access Domain Names (CDN/Global Acceleration)
- Troubleshooting
- Java SDK
- Getting Started
- FAQs
- Bucket Operations
- Object Operations
- Uploading Object
- Downloading Objects
- Copying and Moving Objects
- Listing Objects
- Deleting Objects
- Checking Whether Objects Exist
- Querying Object Metadata
- Modifying Object Metadata
- Object Access URL
- Generating Pre-Signed URLs
- Restoring Archived Objects
- Server-Side Encryption
- Client-Side Encryption
- Single-URL Speed Limits
- Extracting Object Content
- Uploading/Downloading Object at Custom Domain Name
- Data Management
- Cross-Region Disaster Recovery
- Cloud Access Management
- Image Processing
- Content Moderation
- File Processing
- Media Processing
- AI-Based Content Recognition
- Troubleshooting
- Setting Access Domain Names (CDN/Global Acceleration)
- JavaScript SDK
- Node.js SDK
- PHP SDK
- Python SDK
- Getting Started
- Python SDK FAQs
- Bucket Operations
- Object Operations
- Uploading Objects
- Downloading Objects
- Copying and Moving Objects
- Listing Objects
- Deleting Objects
- Checking Whether Objects Exist
- Querying Object Metadata
- Modifying Object Metadata
- Object Access URL
- Getting Pre-Signed URLs
- Restoring Archived Objects
- Extracting Object Content
- Server-Side Encryption
- Client-Side Encryption
- Single-URL Speed Limits
- Cross-Region Disaster Recovery
- Data Management
- Cloud Access Management
- Content Recognition
- Setting Access Domain Names (CDN/Global Acceleration)
- Troubleshooting
- Image Processing
- React Native SDK
- Mini Program SDK
- Getting Started
- FAQs
- Bucket Operations
- Object Operations
- Uploading an Object
- Downloading Objects
- Listing Objects
- Deleting Objects
- Copying and Moving Objects
- Restoring Archived Objects
- Querying Object Metadata
- Checking Whether an Object Exists
- Object Access URL
- Generating Pre-Signed URL
- Configuring CORS Preflight Requests
- Single-URL Speed Limits
- Server-Side Encryption
- Remote disaster-tolerant
- Data Management
- Cloud Access Management
- Data Verification
- Content Moderation
- Setting Access Domain Names (CDN/Global Acceleration)
- Image Processing
- Troubleshooting
- Error Codes
- FAQs
- Related Agreements
- Appendices
- Glossary
Background
Apps are the building blocks of the mobile internet, and they often require massive data uploads and downloads. Therefore, data security and reliability are crucial. Developers can let Tencent Cloud COS handle data storage, and can focus on their app business logics to reduce workload and improve development efficiency. This document describes how to quickly build a COS-based app transfer service to upload and download app data on Tencent Cloud COS. All you need to do is deploy your businesses and generate and manage temporary keys on your server.
COS provides a demo, which you can run as instructed below.
Resources
Preparations
System version: Android 4.1 and later or iOS 11 and later.
Your temporary key server or permanent key (
SecretId and SecretKey can be obtained from the Manage API Key page in the Tencent Cloud console).Tencent Cloud
APPID (if you need to try out the bucket adding feature).Setting up Your Client
Configuring the client
1. Download the project files from GitHub and open them in your IDE.
2. Create
config.dart as instructed in the example/lib/config/config.template file and modify relevant values.3. Run your project to try out the demo.
Note:
We recommend you use a temporary key as instructed in Generating and Using Temporary Keys to call the SDK for security purposes. When you apply for a temporary key, follow the Notes on Principle of Least Privilege to avoid leaking resources besides your buckets and objects.
If you must use a permanent key, do not expose the plaintext of
SecretId and SecretKey to unsecured environments, and we recommend that you follow the Notes on Principle of Least Privilege to limit the scope of permission on the permanent key.Running the Demo
Querying a bucket list
Open the sample app, and you will see all the buckets that you have created.
Creating a bucket
Click +Create Bucket in the top-right corner to open the configuration page, enter the bucket name and select the bucket region.
Querying an object list
Click a bucket, and you will see all the files and folders that it contains.
Uploading an object
On the file list page, click Upload in the top-right corner and select the file to be uploaded.
Downloading an object
In the object list, click Download below a file to download it.
Yes
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