Check if a file exists

BOS

  • Function Release Records
  • Product Announcement
  • S3
    • Overview
    • Compatible Interfaces
    • Compatible Signature Authentication
    • Service domain
    • Compatible Common Headers
    • Compatible Tools
  • Security and compliance
    • Overview
    • Monitoring and Audit
    • Data Disaster Recovery
    • Access control
    • Data protection
    • Data Retention Compliance
    • Data encryption
  • API Reference
    • Interface Specifications
    • Audio and Video Processing Interface
    • Access control
    • Introduction
    • Error code
    • Upload callback
    • Service-Related Interface
      • ListBuckets
      • Quota management
        • DeleteUserQuota
        • PutUserQuota
        • GetUserQuota
    • Image Moderation Service Interface
      • Politician Recognition (Politician)
      • Disgusting Image Recognition (Disgust)
      • API description
      • Watermark and QR Code Recognition (Watermark)
      • Face Detection (Face)
      • Image Quality Recognition (Quality)
      • General Text Recognition (OCR)
      • Pornography Recognition (Antiporn)
      • Public Figure Recognition (Public)
      • Terror Recognition (Terror)
    • Multipart Upload-Related Interface
      • AbortMultipartUpload
      • ListMultipartUploads
      • ListParts
      • User guide
      • UploadPart
      • InitiateMultipartUpload
      • UploadPartCopy
      • CompleteMultipartUpload
    • Bucket-Related Interface
      • Original image protection
        • PutBucketCopyrightProtection
        • GetCopyrightProtection
        • DeleteCopyrightProtection
      • Tag Management
        • PutBucketTagging
        • DeleteBucketTagging
        • GetBucketTagging
      • Quota management
        • PutBucketQuota
        • GetBucketQuota
        • DeleteBucketQuota
      • Data encryption
        • GetBucketEncryption
        • DeleteBucketEncryption
        • PutBucketEncryption
      • Event notification
        • PostResult
        • DeleteNotification
        • PostEvent
        • GetNotification
        • PutNotification
      • Recycle bin
        • DeleteBucketTrash
        • GetBucketTrash
        • PutBucketTrash
      • Data synchronization
        • GetBucketReplicationProgress
        • ListBucketReplication
        • GetBucketReplication
        • PutBucketReplication
        • DeleteBucketReplication
      • Cross-Origin Access
        • GetBucketCors
        • PutBucketCors
        • DeleteBucketCors
      • Mirror back-to-origin
        • PutBucketMirroring
        • DeleteBuketMirroring
        • GetBucketMirroring
      • Basic Operations
        • GetBucketLocation
        • HeadBucket
        • PutBucketStorageclass
        • PutBucket
        • GetBucketStorageClass
        • DeleteBucket
      • Lifecycle
        • DeleteBucketLifecycle
        • GetBucketLifecycle
        • PutBucketLifecycle
      • Permission control
        • PutBucketAcl
        • GetBucketAcl
      • Compliance retention
        • ExtendBucketObjectLock
        • DeleteBucketObjectLock
        • CompleteBucketObjectLock
        • InitBucketObjectLock
        • GetBucketObjectLock
      • Bucket inventory
        • GetBucketInventory
        • ListBucketInventory
        • DeleteBucketInventory
        • PutBucketInventory
      • Requester Pays
        • GetBucketRequestPayment
        • PutBucketRequestPayment
      • Static Website
        • PutBucketStaticWebsite
        • DeleteBucketStaticWebsite
        • GetBucketStaticWebsite
      • Versioning
        • PutBucketVersioning
        • GetBucketVersioning
      • Logging
        • DeleteBucketLogging
        • GetBucketLogging
        • PutBucketLogging
    • Object-Related Interface
      • Object Tag
        • PutObjectTagging
        • GetObjectTagging
        • DeleteObjectTagging
      • Basic Operations
        • CopyObject
        • ListObjects
        • FetchObject
        • GetObjectMeta
        • PostObject
        • listObjectVersions
        • DeleteObject
        • PutObject
        • AppendObject
        • DeleteMultipleObjects
        • RestoreObject
        • GetObject
        • OPTIONSObject
      • Soft links
        • GetSymlink
        • PutSymlink
      • Permission control
        • GetObjectAcl
        • PutObjectAcl
        • DeleteObjectAcl
      • Select scanning
        • SelectObject
  • Console Operation Guide
    • Hierarchical Namespace Bucket Operation Instructions
    • Configuring BOS Multi-User Access Control
    • Image Service
    • Operation preparation
    • Favorite Path
    • Quota management
    • Linkage with Baidu Netdisk sharing
    • Online data import
    • Statistics and monitoring
    • Intelligent Business Analysis
    • Event Notification and Data Processing
    • View and export usage data
    • Image Review Service
    • Automatic file decompression
    • Data Publishing
      • Data Publishing Introduction
      • Global Acceleration
      • Creating a Bucket Custom Domain Name
      • Viewing Bucket Official Domain Name
      • Configure Cache Management
      • Enabling CDN Official Acceleration Domain Name
      • Configuring CDN Upload Acceleration
    • Global Settings
      • VPC Access Control
    • Managing Bucket
      • Set static website hosting
      • Setting Up Log Query
      • Set referer allow list
      • Create bucket
      • Set cross-origin access
      • Set bucket trash
      • Set mirror back-to-origin
      • Set access logs
      • Set server-side encryption
      • Set storage inventory
      • Managing Bucket Tag
      • Querying Bucket
      • Data access trend analysis
      • Bucket quota management
      • Set compliance retention
      • Bucket overview
      • Set data synchronization
      • Setting Up Versioning
      • Requester Pays
      • Delete bucket
      • Managing Lifecycle
        • Overview
        • Configure intelligent tiering
        • Configuring Basic Lifecycle Management
        • Basic Lifecycle Management Usage Instructions
          • Lifecycle Rule Based on Last Accessed Time
          • Lifecycle Rule Based on Last Modified Time
      • Set bucket read-write permissions
        • Permission Introduction
        • Set bucket read-write permissions
    • Manage object
      • Setting Symlink
      • Select scanning
      • Setting Meta Information
      • Share files - get file URLs
      • Parts management
      • Folder sharing
      • Restore Archived Files
      • Delete file
      • Copy and move files
      • Delete folders in batches
      • Batch Managing Object
      • Folder statistics
      • Renamed files
      • Convert file storage class
      • Set file permissions
      • Download file
      • Querying Object
      • Upload files
      • Managing Folder
      • Object Tag
  • Managing Bucket
    • Set static website hosting
    • Set referer allow list
    • Create bucket
    • Set bucket trash
    • Set mirror back-to-origin
    • Set access logs
    • Set server-side encryption
    • Set storage inventory
    • Managing Bucket Tag
    • Bucket quota management
    • Set compliance retention
    • Bucket overview
    • Set data synchronization
    • Requester Pays
    • Delete bucket
    • _Archive
      • Set static website hosting
      • Set referer allow list
      • Create bucket
      • Set cross-origin access
      • Set bucket trash
      • Set mirror back-to-origin
      • Set access logs
      • Set server-side encryption
      • Set storage inventory
      • Managing Bucket Tag
      • Querying Bucket
      • Bucket quota management
      • Set compliance retention
      • Bucket overview
      • Set data synchronization
      • Requester Pays
      • Delete bucket
    • Set bucket read-write permissions
      • Permission Introduction
      • Set bucket read-write permissions
      • _Archive
        • Permission Introduction
        • Set bucket read-write permissions
  • Content Review
    • Video Review
    • Image audit
  • Service Level Agreement (SLA)
    • BOS Service Level Agreement SLA (V3_0)
    • Baidu AI Cloud Object Storage (BOS) Trusted Cloud Certification
  • Data processing
    • Image audit
    • Data Processing FAQs
    • Document preview
    • Video frame capture
    • Instant video transcoding
    • Data Processing Introduction
    • Image Processing Terminology Explanation
    • Multimedia cloud processing
    • Get video metadata
    • General Image Settings
      • Original image protection
    • Intelligent Recognition
      • Overview
    • Image Processing Guide V2_0
      • Removing Metadata
      • Image Scaling
      • Image Brightness
      • Getting Image Information
      • Image Blur
      • Usage rules
      • Image Resizing
      • Quality Transformation
      • Format conversion
      • Progressive Display
      • Image Sharpening
      • Grayscale Transformation
      • Image Contrast
      • Image Rotation
        • Normal Rotation
        • Adaptive Rotation
      • Intelligent Processing
        • Intelligent Processing Usage Rules
        • Intelligent Scenarios
          • Lossless magnification
          • Portrait Cartoonization
          • Sky Segmentation
          • Style conversion
          • Black and white coloring
          • Stretch Restoration
          • Object erasure
        • Intelligent Effects
          • Intelligent Contrast
          • Intelligent Sharpness
          • Intelligent defogging
          • Intelligent Color Grading
      • Image Cropping
        • Rounded-corner rectangle cropping
        • Incircle Crop
        • Normal Crop
        • Index Crop
      • Image Watermark
        • Add Image-Text Mixed Watermark
        • Add Text Watermark
        • Add image watermark
    • Image Processing Guide V1_0
      • Image Cropping
      • Getting Image Information
      • Image Thumbnailing
      • Usage rules
      • Quality Transformation
      • Format conversion
      • Watermark
      • Progressive Display
      • Image Rotation
  • Peripheral Tools
    • fsspec-bosfs
    • Peripheral Tools Overview
    • BOS-FTP Tool
    • Download Zone
    • BOS-AlluxioExtension Tool
    • BOS-PC Client
      • FAQs
      • User guide
      • Installation and Login
    • BOS-HDFS Tool
      • Overview
      • Configuration and Usage
      • Big Data Component Usage Guide
        • DataX Reading and Writing BOS
        • Hive Usage Guide
        • Presto Usage Guide
        • Spark Usage Guide
        • Flume Data Storage to BOS
        • Flink Usage Guide
        • Impala Usage Guide
    • BOS-Probe Error Detection Tool
      • Overview
      • Suggestions and Report Viewing
      • Checking Uploads and Downloads via BOSProbe
      • Installing BOSProbe
    • Docker
      • Overview
    • BOS-CMD Command-Line Tool
      • Configure BCECMD Command-Line Completion
      • Install BOSCMD
      • Overview
      • FAQs
      • Use BOS Service via CMD
      • BOS CMD Common Issues
      • BOSCMD Version Change Records
      • Configure BOSCMD
    • BOS-Import Data Cloud Migration Tool
      • Configuration file
      • Deployment methods
      • Overview
      • Version records
      • Exception handling
      • Log
      • Task Progress Recovery
    • BOS-FS Mount Tool
      • Operations and Practices
      • Overview
      • Version Change Records
      • FAQs
      • Install
      • Configuration
    • BOS-API Generation Tool
      • Overview
      • Service-Related Interface
        • List Buckets
        • Quota management
          • Delete User Credit Quota Settings
          • Get User Credit Quota Information
          • Set User Credit Quota
      • Image Moderation Service Interface
        • Image Review Interface
      • How to Call the API
        • Authentication
        • Construct a Request
        • Return a Response
      • Bucket Data Synchronization Related Interfaces
        • Retrieving the Process Status of Data Synchronization for a Specified ID in a Bucket
        • Setting Up Bucket Data Synchronization
        • Deleting the Synchronization Replication Configuration of a Specified ID in a Bucket
        • Listing All Replication Synchronization Rules of a Bucket
        • Retrieving Bucket Data Synchronization Information
      • Bucket-Related Interface
        • Original image protection
          • Disabling Bucket Original Image Protection Configuration
          • Get the original image protection configuration of bucket
          • Enable the original image protection function of bucket
        • Data encryption
          • Check If Encryption Is Enabled for a Bucket
          • Disable Server-Side Encryption (SSE) for a Bucket
          • Enable Encryption for a Bucket
        • Event notification
          • Setting Up Bucket Notification Rules
          • Retrieving Bucket Notification Rules
          • Pushing ImageOcr and ImageClassify Messages
          • Deleting Bucket Notification Rules
          • Pushing Event Messages
        • Recycle bin
          • Retrieving the Activation Status of the Bucket Recycle Bin
          • Disabling Bucket Recycle Bin Functionality
          • Enabling Bucket Recycle Bin Functionality
        • Cross-Origin Access
          • Get Cross-Origin Resource Sharing (CORS) Rules Set on a Specified Bucket
          • Disable Cross-Origin Resource Sharing (CORS) Rule on a Specified Bucket
          • Set a Cross-Origin Resource Sharing (CORS) Rule on a Specified Bucket
        • Basic Operations
          • List Buckets
          • Cross-Origin Query
          • Create a bucket
          • Get the Default Storage Class of a Bucket
          • List Objects in a Bucket
          • Set default bucket storage class
          • Get the Region of a Bucket
          • Check If a Bucket Exists and Whether the Requester Has Permission to Access the Bucket
          • Delete bucket
        • Lifecycle
          • Get Lifecycle Management Rules for a Bucket
          • Delete Lifecycle Management Rules for a Bucket
          • Set Lifecycle for a Bucket
        • Permission control
          • Set bucket access permissions
          • Get Access Permission for a Bucket
        • Compliance retention
          • Retrieving Bucket Compliance Retention Policies
          • Deleting Compliance Retention Policies
          • Locking Bucket Compliance Retention Policies
          • Delaying the Protection Period of Bucket Compliance Retention Policies
          • Initializing Compliance Retention Policies
        • Static Website
          • Set static website hosting
          • Delete Static Website Hosting Information for a Bucket
          • Get Static Website Hosting Information for a Bucket
        • Logging
          • Enable bucket access logs
          • Disable Access Log Configuration for a Bucket
          • Get Access Log Configuration for a Bucket
      • Object-Related Interface
        • Basic Operations
          • Get Meta Information of an Object
          • Restore Archived Files
          • Get an Object
          • Fetch an Object and Store It in a Bucket
          • Delete Multiple Objects
          • Delete Object
        • Soft links
          • Retrieve a symlink
          • Create a symlink
        • Permission control
          • Set access permission for an object
          • Delete Access Permission for an Object
          • Get Access Permission for an Object
        • Select scanning
          • Execute SQL Statement on an Object
    • MoonBox Physical Migration Device
      • MoonBox introduction
      • MoonBox Operation Process
    • BOS Connector for PyTorch
      • Overview
      • Functionality and Usage Instructions
      • Reading and Writing Checkpoints
      • Installing BOS Connector for Pytorch
      • Building a Dataset
      • Configuring BOS Connector for Pytorch
      • Performance test
    • BOS-CLI Command-Line Tool (Old Version)
      • Overview
      • Version Change Records
      • Configure BOSCLI
      • Install BOSCLI
      • Use BOS Service via CLI
    • BOS-Util Batch Operation Tool
      • Overview
      • Version Change Records
      • Install BOS-Util
      • Using BOS Service via BOS-Util
    • Third-party tools
      • rclone
      • S3 Browser
      • MinIO
      • Goofys
      • Other Tools
  • Typical Practices
    • Using BOS as Backend Storage Service for Jfrog Artifactory
    • How to Solve Browser Cross-Origin CORS Issues
    • Using HTTPDNS Service via Android SDK
    • Client-Side Encryption Practice
    • BOS Dedicated Line Back-to-Origin IDC Best Practices
    • Presto Practice Based on BOS
    • Accessing BOS via Dedicated Line-VPN in Hybrid Cloud
    • CDN Dynamic Acceleration Uploading Data to BOS
    • HTTPS Transmission Encryption Practice
    • Using CDN to Accelerate BOS
    • Hotlink Protection
    • AWS Lambda Synchronizing S3 Data to BOS
    • Impala Practice Based on BOS
    • Direct Upload of Web Data to BOS
      • Advanced Chapter I - STS Temporary Authentication
      • Basic Chapter - Directly Uploading Files to BOS in the Browser
      • Advanced Chapter II - Handling Older Versions of IE via the PostObject Interface
      • Principle Chapter III - STS Temporary Authentication
      • Principle Chapter I - Directly Uploading Files to BOS in the Browser
      • Principle Chapter II - Upload large file in parts
    • Data Migration
      • Migrating Data from Third-Party Clouds to BOS
      • Migrating Local Data to BOS
      • Scenario overview
    • Mobile Photo Editing App Practice
      • Overview and Scenario Introduction
      • Code example
      • Solution Practice - Building the Photo Editing App
      • Solution Practice - Using the Photo Editing App
    • Accessing BOS via Python API Request
      • Upload File to Bucket via PUT Request
      • Basics (Must-Read) - Generation of authentication string
      • Download Bucket File to Local via GET Request
  • FAQs
    • Certification and permission management
    • Image Service
    • Security Problems
    • Bucket Domain Name Request Style
    • General Problems
    • Object upload-download and management
    • Data Migration and Backup
    • Billing Problems
    • API & SDK & Tools
    • Common Questions Overview
    • Bucket access and management
    • Analysis and Statistic
    • Performance-related questions
  • Video Zone
    • Accessing BOS Resources via Domain Name
    • Object upload
    • Understanding BOS
    • BOS Tiered Storage
  • Quick Start
    • Create bucket
    • Get Object
    • Upload Object
    • Quick Start Guide
    • Getting Started with BOS
    • Delete Object
    • Delete bucket
  • Product pricing
    • Billing Cases
    • Insufficient Balance and Debt Reminder
    • View Consumption Details
    • Billing FAQs
    • Product price
      • Resource Package Price List
      • Pay-As-You-Go Charge Type
      • Pay-As-You-Go Price List
        • Traffic Price
        • Storage prices
        • Data Processing Price
        • Request Price
      • Resource Package Charge Type
        • Resource Package Deduction Rules
        • Resource Package Overview
      • Resource Package Price List - Deprecated
        • Internet downlink traffic package
        • Infrequent access storage package
        • Back-to-origin traffic package
        • Archive storage package
        • Cold storage package
        • Standard storage package
    • Charge Item Introduction
      • Traffic fees
      • Storage Cost
      • Request fees
      • Data processing fees
      • Charge Item Overview
  • SDK
    • SDK Overview
    • Harmony-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • Exception handling
      • Log
      • Bucket management
        • Create Bucket
        • Bucket permission control
        • View the region to which a bucket belongs
        • Bucket Storage Class Setting and Query
        • View bucket list
        • Check if bucket exists
        • Delete bucket
      • Object management
        • Object permission control
        • Multipart upload of objects
        • Get Object
        • View the object in the bucket
        • Copy Object
        • Upload Object
        • Delete Object
    • Ruby-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • SDK Logging
      • Exception handling
      • Bucket management
        • Create Bucket
        • List buckets
        • Overview
        • Bucket permission management
        • View the region to which a bucket belongs
        • Check if bucket exists
        • Delete bucket
      • File management
        • Object permission control
        • Change file storage class
        • Get file download URL
        • Delete file
        • Copy Object
        • Download file
        • Upload files
        • List files in the storage space
        • Get and update file meta information
        • Check if a file exists
    • Python-SDK
      • Overview
      • Version Change Records
      • Initialization
      • FAQs
      • Install the SDK Package
      • Exception handling
      • Log Control
      • Bucket management
        • Bucket cross-origin resource access
        • Create Bucket
        • Bucket Recycle Bin
        • List buckets
        • Overview
        • Bucket Inventory Management
        • Mirror back-to-origin
        • Bucket Lifecycle Management
        • Event notification
        • Set bucket storage class
        • Bucket permission management
        • View the region to which a bucket belongs
        • Close Recycle Bin
        • Logging
        • Data synchronization
        • Get Recycle Bin Activation Information
        • Check if bucket exists
        • User Credit Quota Management
        • Original image protection
        • Delete bucket
      • File management
        • Object permission control
        • Change file storage class
        • Get file download URL
        • Delete file
        • Copy Object
        • Select file
        • Soft links
        • Download file
        • Upload files
        • Restore archived storage class files
        • List files in the storage space
        • Get and update file meta information
        • Check if a file exists
    • JavaScript-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Quota management
      • Bucket management
      • Install SDK
      • Bucket management
        • Data Synchronization Configuration
        • Create Bucket
        • Overview
        • Bucket Logging Management
        • Bucket Lifecycle Management
        • Set bucket storage class
        • Bucket permission management
        • View the region to which a bucket belongs
        • View bucket list
        • Check if bucket exists
        • Delete bucket
      • Object management
        • Multipart upload of objects
        • Get Object
        • View the object in the bucket
        • Copy Object
        • Upload Object
        • Get File URL
        • Delete Object
    • Android-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • Exception handling
      • Bucket management
      • Log
      • Object management
      • Bucket management
        • Create Bucket
        • Bucket permission control
        • View bucket list
        • Check if bucket exists
        • Delete bucket
      • File management
        • Object permission control
        • Multipart upload of objects
        • Get Object
        • View the object in the bucket
        • Copy Object
        • Upload Object
        • Delete Object
    • Java-SDK
      • Overview
      • Version Change Records
      • Initialization
      • File management
      • FAQs
      • Install the SDK Package
      • SDK Logging
      • Exception handling
      • Data Processing and Usage
      • Bucket management
      • Bucket management
        • Bucket static website hosting
        • Recycle bin
        • Bucket data synchronization
        • Create Bucket
        • List buckets
        • Overview
        • Mirror back-to-origin
        • Set Bucket server-side encryption
        • Set bucket storage class
        • Bucket permission management
        • View the region to which a bucket belongs
        • Tag Management
        • Check if bucket exists
        • Original image protection
        • Delete bucket
      • File management
        • Copy files
        • Object permission control
        • Change file storage class
        • Get file download URL
        • Delete file
        • Get directory capacity overview
        • Select file
        • Download file
        • Upload files
        • Restore archived storage class files
        • List files in the storage space
        • Object Tag
        • Get and update file meta information
        • Check if a file exists
    • IOS-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • Exception handling
      • Bucket management
      • Log
      • Object management
      • Bucket management
        • Create New Bucket
        • Determine whether the bucket exists and whether there is permission to access it
        • Bucket permission control
        • View bucket list
        • Delete bucket
      • File management
        • Multipart upload of objects
        • Get Object
        • View the object in the bucket
        • Copy Object
        • Upload Object
        • Delete Object
    • GO-SDK
      • Overview
      • Version Change Records
      • Initialization
      • File management
      • Install the SDK Package
      • SDK Logging
      • Data Processing and Usage
      • Bucket management
      • Request management
      • Error handling
    • C-Dotnet-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • Exception handling
      • Bucket management
      • Object management
    • PHP-SDK
      • Overview
      • Version Change Records
      • Initialization
      • File management
      • Install the SDK Package
      • Exception handling
      • Bucket management
    • C-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Exception handling
      • Install SDK Toolkit
      • Bucket management
        • Create Bucket
        • List Buckets
        • Overview
        • Check If Bucket Exists
        • Delete Bucket
      • File management
        • Copy files
        • Object permission control
        • Change file storage class
        • Delete file
        • Download file
        • Upload files
        • Archive storage
        • Get and Update Metadata Information
        • Get File Download Link
        • List files in the storage space
        • Check if a file exists
    • C++-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • SDK Logging
      • Exception handling
      • Bucket management
        • Create Bucket
        • List buckets
        • Overview
        • Bucket permission management
        • View the region to which a bucket belongs
        • Check if bucket exists
        • Delete bucket
      • File management
        • Copy files
        • Object permission control
        • Change file storage class
        • Get file download URL
        • Delete file
        • Object Tag Management
        • Download file
        • Upload files
        • Archive storage
        • List files in the storage space
        • Get and update file meta information
        • Check if a file exists
      • Request management
        • Cancel request interruption
  • Product Description
    • Product functions
    • Application scenarios
    • Product advantages
    • Usage restrictions
    • Product introduction
    • Core concepts
    • Tiered Storage Introduction
      • Why Tiered Storage Exists
      • Introduction to storage classes
  • Data Cube
    • Batch processing
    • ZIP packaging and compression
    • Intelligent Data Processing
      • Video processing
        • Video frame capture
        • Instant video transcoding
        • Multimedia cloud processing
        • M3U8 signature
        • Get video metadata
      • Document processing
        • Document preview
      • Image processing
        • Image Processing Introduction
        • Image Processing FAQs
        • Image Processing Terminology Explanation
        • General Image Settings
          • Original image protection
        • Image Processing Guide V2_0
          • Removing Metadata
          • Image Scaling
          • Image Processing Persistence
          • Image Brightness
          • Image Blind Watermark
          • Return Original Image on Failure
          • Getting Image Information
          • Image Blur
          • Usage rules
          • Quality Transformation
          • Format conversion
          • Progressive Display
          • Image Sharpening
          • Grayscale Transformation
          • Image Compression
          • Image Anomaly Detection
          • Image Contrast
          • Image Rotation
            • Normal Rotation
            • Adaptive Rotation
          • Intelligent Processing
            • Intelligent Processing Usage Rules
            • Intelligent Scenarios
              • Lossless magnification
              • Portrait Cartoonization
              • Sky Segmentation
              • Style conversion
              • Black and white coloring
              • Stretch Restoration
              • Object erasure
            • Intelligent Effects
              • Intelligent Contrast
              • Intelligent Sharpness
              • Intelligent defogging
              • Intelligent Color Grading
          • Image Cropping
            • Rounded-corner rectangle cropping
            • Incircle Crop
            • Normal Crop
            • Index Crop
          • Image Watermark
            • Add Image-Text Mixed Watermark
            • Add Text Watermark
            • Add image watermark
        • Image Processing Guide V1_0
          • Image Cropping
          • Getting Image Information
          • Image Thumbnailing
          • Usage rules
          • Quality Transformation
          • Format conversion
          • Watermark
          • Progressive Display
          • Image Rotation
  • Related Agreements
    • Baidu AI Cloud Object Storage (BOS) and Baidu Netdisk Integration Usage Agreement
  • Developer Guide
    • Single-link rate limit
    • Image audit
    • Region and Endpoint
    • Event notification
    • Monitor Service Operations
    • Static website hosting
    • Basic concepts
    • Development Preparation
    • Data Publishing
      • Binding Custom Domain Name
      • CDN Acceleration Publishing
    • Data Disaster Recovery
      • Multi-AZ storage
      • Data synchronization
    • Data Security
      • Set anti-stealing-link
      • Set bucket trash
      • Set server-side encryption
      • Principle of least privilege
      • Permission control
        • Object permission control
        • Bucket permission control
        • IAM primary-IAM user access control
      • Versioning
        • Deletion Mark
        • Versioning Overview
    • Bucket Basic Operations
      • Create bucket
      • Data Publishing
      • Obtaining Bucket Region Information
      • Managing Lifecycle
      • Set access logs
      • Setting Bucket Tag
      • Setting Cross-Origin Resource Sharing (CORS)
      • View bucket list
      • Delete bucket
    • Data lifecycle management
      • Intelligent Business Analysis
    • Data Migration to Cloud
      • Migration from other clouds
      • Local data to cloud
      • Scenario overview
    • Data lake access
      • Hierarchical namespace
      • Metadata Conversion Service
    • Object Basic Operations
      • Managing Files
        • Copy data
        • Select scanning
        • Delete data
        • Obtaining Data Metadata
        • Viewing File List
        • Object Tag
      • Uploading Data
        • Simple upload
        • Append upload
        • Form upload
        • Upload callback
        • Chunking and Resumable Upload
      • Downloading Data
        • Simple Download
        • Resumable download
  • Data Lake Storage
    • Big Data Component Usage Guide
      • HBase Uses BOS as Underlying Storage
      • Kafka Data Storage to BOS
      • Hive Usage Guide
      • Presto Usage Guide
      • Spark Usage Guide
      • Flume Data Storage to BOS
      • Flink Usage Guide
      • Impala Usage Guide
      • Fluentd Collects Data Storage to BOS
      • Logstash Data Storage to BOS
      • Elasticsearch Snapshot Data Storage to BOS
      • Druid Uses BOS as Deep Storage
    • BOS HDFS tool
      • Overview
      • FAQs
      • Configuration and Usage
    • Data Migration and Transfer
      • Migrate Data to Hierarchical Namespace Bucket Using DistCp
      • DataX Read and Write BOS
    • Hierarchical namespace
      • Usage method
      • Service Introduction
      • Convert Normal Bucket to Hierarchical Namespace Bucket
      • Function Support Description
All documents
menu
No results found, please re-enter

BOS

  • Function Release Records
  • Product Announcement
  • S3
    • Overview
    • Compatible Interfaces
    • Compatible Signature Authentication
    • Service domain
    • Compatible Common Headers
    • Compatible Tools
  • Security and compliance
    • Overview
    • Monitoring and Audit
    • Data Disaster Recovery
    • Access control
    • Data protection
    • Data Retention Compliance
    • Data encryption
  • API Reference
    • Interface Specifications
    • Audio and Video Processing Interface
    • Access control
    • Introduction
    • Error code
    • Upload callback
    • Service-Related Interface
      • ListBuckets
      • Quota management
        • DeleteUserQuota
        • PutUserQuota
        • GetUserQuota
    • Image Moderation Service Interface
      • Politician Recognition (Politician)
      • Disgusting Image Recognition (Disgust)
      • API description
      • Watermark and QR Code Recognition (Watermark)
      • Face Detection (Face)
      • Image Quality Recognition (Quality)
      • General Text Recognition (OCR)
      • Pornography Recognition (Antiporn)
      • Public Figure Recognition (Public)
      • Terror Recognition (Terror)
    • Multipart Upload-Related Interface
      • AbortMultipartUpload
      • ListMultipartUploads
      • ListParts
      • User guide
      • UploadPart
      • InitiateMultipartUpload
      • UploadPartCopy
      • CompleteMultipartUpload
    • Bucket-Related Interface
      • Original image protection
        • PutBucketCopyrightProtection
        • GetCopyrightProtection
        • DeleteCopyrightProtection
      • Tag Management
        • PutBucketTagging
        • DeleteBucketTagging
        • GetBucketTagging
      • Quota management
        • PutBucketQuota
        • GetBucketQuota
        • DeleteBucketQuota
      • Data encryption
        • GetBucketEncryption
        • DeleteBucketEncryption
        • PutBucketEncryption
      • Event notification
        • PostResult
        • DeleteNotification
        • PostEvent
        • GetNotification
        • PutNotification
      • Recycle bin
        • DeleteBucketTrash
        • GetBucketTrash
        • PutBucketTrash
      • Data synchronization
        • GetBucketReplicationProgress
        • ListBucketReplication
        • GetBucketReplication
        • PutBucketReplication
        • DeleteBucketReplication
      • Cross-Origin Access
        • GetBucketCors
        • PutBucketCors
        • DeleteBucketCors
      • Mirror back-to-origin
        • PutBucketMirroring
        • DeleteBuketMirroring
        • GetBucketMirroring
      • Basic Operations
        • GetBucketLocation
        • HeadBucket
        • PutBucketStorageclass
        • PutBucket
        • GetBucketStorageClass
        • DeleteBucket
      • Lifecycle
        • DeleteBucketLifecycle
        • GetBucketLifecycle
        • PutBucketLifecycle
      • Permission control
        • PutBucketAcl
        • GetBucketAcl
      • Compliance retention
        • ExtendBucketObjectLock
        • DeleteBucketObjectLock
        • CompleteBucketObjectLock
        • InitBucketObjectLock
        • GetBucketObjectLock
      • Bucket inventory
        • GetBucketInventory
        • ListBucketInventory
        • DeleteBucketInventory
        • PutBucketInventory
      • Requester Pays
        • GetBucketRequestPayment
        • PutBucketRequestPayment
      • Static Website
        • PutBucketStaticWebsite
        • DeleteBucketStaticWebsite
        • GetBucketStaticWebsite
      • Versioning
        • PutBucketVersioning
        • GetBucketVersioning
      • Logging
        • DeleteBucketLogging
        • GetBucketLogging
        • PutBucketLogging
    • Object-Related Interface
      • Object Tag
        • PutObjectTagging
        • GetObjectTagging
        • DeleteObjectTagging
      • Basic Operations
        • CopyObject
        • ListObjects
        • FetchObject
        • GetObjectMeta
        • PostObject
        • listObjectVersions
        • DeleteObject
        • PutObject
        • AppendObject
        • DeleteMultipleObjects
        • RestoreObject
        • GetObject
        • OPTIONSObject
      • Soft links
        • GetSymlink
        • PutSymlink
      • Permission control
        • GetObjectAcl
        • PutObjectAcl
        • DeleteObjectAcl
      • Select scanning
        • SelectObject
  • Console Operation Guide
    • Hierarchical Namespace Bucket Operation Instructions
    • Configuring BOS Multi-User Access Control
    • Image Service
    • Operation preparation
    • Favorite Path
    • Quota management
    • Linkage with Baidu Netdisk sharing
    • Online data import
    • Statistics and monitoring
    • Intelligent Business Analysis
    • Event Notification and Data Processing
    • View and export usage data
    • Image Review Service
    • Automatic file decompression
    • Data Publishing
      • Data Publishing Introduction
      • Global Acceleration
      • Creating a Bucket Custom Domain Name
      • Viewing Bucket Official Domain Name
      • Configure Cache Management
      • Enabling CDN Official Acceleration Domain Name
      • Configuring CDN Upload Acceleration
    • Global Settings
      • VPC Access Control
    • Managing Bucket
      • Set static website hosting
      • Setting Up Log Query
      • Set referer allow list
      • Create bucket
      • Set cross-origin access
      • Set bucket trash
      • Set mirror back-to-origin
      • Set access logs
      • Set server-side encryption
      • Set storage inventory
      • Managing Bucket Tag
      • Querying Bucket
      • Data access trend analysis
      • Bucket quota management
      • Set compliance retention
      • Bucket overview
      • Set data synchronization
      • Setting Up Versioning
      • Requester Pays
      • Delete bucket
      • Managing Lifecycle
        • Overview
        • Configure intelligent tiering
        • Configuring Basic Lifecycle Management
        • Basic Lifecycle Management Usage Instructions
          • Lifecycle Rule Based on Last Accessed Time
          • Lifecycle Rule Based on Last Modified Time
      • Set bucket read-write permissions
        • Permission Introduction
        • Set bucket read-write permissions
    • Manage object
      • Setting Symlink
      • Select scanning
      • Setting Meta Information
      • Share files - get file URLs
      • Parts management
      • Folder sharing
      • Restore Archived Files
      • Delete file
      • Copy and move files
      • Delete folders in batches
      • Batch Managing Object
      • Folder statistics
      • Renamed files
      • Convert file storage class
      • Set file permissions
      • Download file
      • Querying Object
      • Upload files
      • Managing Folder
      • Object Tag
  • Managing Bucket
    • Set static website hosting
    • Set referer allow list
    • Create bucket
    • Set bucket trash
    • Set mirror back-to-origin
    • Set access logs
    • Set server-side encryption
    • Set storage inventory
    • Managing Bucket Tag
    • Bucket quota management
    • Set compliance retention
    • Bucket overview
    • Set data synchronization
    • Requester Pays
    • Delete bucket
    • _Archive
      • Set static website hosting
      • Set referer allow list
      • Create bucket
      • Set cross-origin access
      • Set bucket trash
      • Set mirror back-to-origin
      • Set access logs
      • Set server-side encryption
      • Set storage inventory
      • Managing Bucket Tag
      • Querying Bucket
      • Bucket quota management
      • Set compliance retention
      • Bucket overview
      • Set data synchronization
      • Requester Pays
      • Delete bucket
    • Set bucket read-write permissions
      • Permission Introduction
      • Set bucket read-write permissions
      • _Archive
        • Permission Introduction
        • Set bucket read-write permissions
  • Content Review
    • Video Review
    • Image audit
  • Service Level Agreement (SLA)
    • BOS Service Level Agreement SLA (V3_0)
    • Baidu AI Cloud Object Storage (BOS) Trusted Cloud Certification
  • Data processing
    • Image audit
    • Data Processing FAQs
    • Document preview
    • Video frame capture
    • Instant video transcoding
    • Data Processing Introduction
    • Image Processing Terminology Explanation
    • Multimedia cloud processing
    • Get video metadata
    • General Image Settings
      • Original image protection
    • Intelligent Recognition
      • Overview
    • Image Processing Guide V2_0
      • Removing Metadata
      • Image Scaling
      • Image Brightness
      • Getting Image Information
      • Image Blur
      • Usage rules
      • Image Resizing
      • Quality Transformation
      • Format conversion
      • Progressive Display
      • Image Sharpening
      • Grayscale Transformation
      • Image Contrast
      • Image Rotation
        • Normal Rotation
        • Adaptive Rotation
      • Intelligent Processing
        • Intelligent Processing Usage Rules
        • Intelligent Scenarios
          • Lossless magnification
          • Portrait Cartoonization
          • Sky Segmentation
          • Style conversion
          • Black and white coloring
          • Stretch Restoration
          • Object erasure
        • Intelligent Effects
          • Intelligent Contrast
          • Intelligent Sharpness
          • Intelligent defogging
          • Intelligent Color Grading
      • Image Cropping
        • Rounded-corner rectangle cropping
        • Incircle Crop
        • Normal Crop
        • Index Crop
      • Image Watermark
        • Add Image-Text Mixed Watermark
        • Add Text Watermark
        • Add image watermark
    • Image Processing Guide V1_0
      • Image Cropping
      • Getting Image Information
      • Image Thumbnailing
      • Usage rules
      • Quality Transformation
      • Format conversion
      • Watermark
      • Progressive Display
      • Image Rotation
  • Peripheral Tools
    • fsspec-bosfs
    • Peripheral Tools Overview
    • BOS-FTP Tool
    • Download Zone
    • BOS-AlluxioExtension Tool
    • BOS-PC Client
      • FAQs
      • User guide
      • Installation and Login
    • BOS-HDFS Tool
      • Overview
      • Configuration and Usage
      • Big Data Component Usage Guide
        • DataX Reading and Writing BOS
        • Hive Usage Guide
        • Presto Usage Guide
        • Spark Usage Guide
        • Flume Data Storage to BOS
        • Flink Usage Guide
        • Impala Usage Guide
    • BOS-Probe Error Detection Tool
      • Overview
      • Suggestions and Report Viewing
      • Checking Uploads and Downloads via BOSProbe
      • Installing BOSProbe
    • Docker
      • Overview
    • BOS-CMD Command-Line Tool
      • Configure BCECMD Command-Line Completion
      • Install BOSCMD
      • Overview
      • FAQs
      • Use BOS Service via CMD
      • BOS CMD Common Issues
      • BOSCMD Version Change Records
      • Configure BOSCMD
    • BOS-Import Data Cloud Migration Tool
      • Configuration file
      • Deployment methods
      • Overview
      • Version records
      • Exception handling
      • Log
      • Task Progress Recovery
    • BOS-FS Mount Tool
      • Operations and Practices
      • Overview
      • Version Change Records
      • FAQs
      • Install
      • Configuration
    • BOS-API Generation Tool
      • Overview
      • Service-Related Interface
        • List Buckets
        • Quota management
          • Delete User Credit Quota Settings
          • Get User Credit Quota Information
          • Set User Credit Quota
      • Image Moderation Service Interface
        • Image Review Interface
      • How to Call the API
        • Authentication
        • Construct a Request
        • Return a Response
      • Bucket Data Synchronization Related Interfaces
        • Retrieving the Process Status of Data Synchronization for a Specified ID in a Bucket
        • Setting Up Bucket Data Synchronization
        • Deleting the Synchronization Replication Configuration of a Specified ID in a Bucket
        • Listing All Replication Synchronization Rules of a Bucket
        • Retrieving Bucket Data Synchronization Information
      • Bucket-Related Interface
        • Original image protection
          • Disabling Bucket Original Image Protection Configuration
          • Get the original image protection configuration of bucket
          • Enable the original image protection function of bucket
        • Data encryption
          • Check If Encryption Is Enabled for a Bucket
          • Disable Server-Side Encryption (SSE) for a Bucket
          • Enable Encryption for a Bucket
        • Event notification
          • Setting Up Bucket Notification Rules
          • Retrieving Bucket Notification Rules
          • Pushing ImageOcr and ImageClassify Messages
          • Deleting Bucket Notification Rules
          • Pushing Event Messages
        • Recycle bin
          • Retrieving the Activation Status of the Bucket Recycle Bin
          • Disabling Bucket Recycle Bin Functionality
          • Enabling Bucket Recycle Bin Functionality
        • Cross-Origin Access
          • Get Cross-Origin Resource Sharing (CORS) Rules Set on a Specified Bucket
          • Disable Cross-Origin Resource Sharing (CORS) Rule on a Specified Bucket
          • Set a Cross-Origin Resource Sharing (CORS) Rule on a Specified Bucket
        • Basic Operations
          • List Buckets
          • Cross-Origin Query
          • Create a bucket
          • Get the Default Storage Class of a Bucket
          • List Objects in a Bucket
          • Set default bucket storage class
          • Get the Region of a Bucket
          • Check If a Bucket Exists and Whether the Requester Has Permission to Access the Bucket
          • Delete bucket
        • Lifecycle
          • Get Lifecycle Management Rules for a Bucket
          • Delete Lifecycle Management Rules for a Bucket
          • Set Lifecycle for a Bucket
        • Permission control
          • Set bucket access permissions
          • Get Access Permission for a Bucket
        • Compliance retention
          • Retrieving Bucket Compliance Retention Policies
          • Deleting Compliance Retention Policies
          • Locking Bucket Compliance Retention Policies
          • Delaying the Protection Period of Bucket Compliance Retention Policies
          • Initializing Compliance Retention Policies
        • Static Website
          • Set static website hosting
          • Delete Static Website Hosting Information for a Bucket
          • Get Static Website Hosting Information for a Bucket
        • Logging
          • Enable bucket access logs
          • Disable Access Log Configuration for a Bucket
          • Get Access Log Configuration for a Bucket
      • Object-Related Interface
        • Basic Operations
          • Get Meta Information of an Object
          • Restore Archived Files
          • Get an Object
          • Fetch an Object and Store It in a Bucket
          • Delete Multiple Objects
          • Delete Object
        • Soft links
          • Retrieve a symlink
          • Create a symlink
        • Permission control
          • Set access permission for an object
          • Delete Access Permission for an Object
          • Get Access Permission for an Object
        • Select scanning
          • Execute SQL Statement on an Object
    • MoonBox Physical Migration Device
      • MoonBox introduction
      • MoonBox Operation Process
    • BOS Connector for PyTorch
      • Overview
      • Functionality and Usage Instructions
      • Reading and Writing Checkpoints
      • Installing BOS Connector for Pytorch
      • Building a Dataset
      • Configuring BOS Connector for Pytorch
      • Performance test
    • BOS-CLI Command-Line Tool (Old Version)
      • Overview
      • Version Change Records
      • Configure BOSCLI
      • Install BOSCLI
      • Use BOS Service via CLI
    • BOS-Util Batch Operation Tool
      • Overview
      • Version Change Records
      • Install BOS-Util
      • Using BOS Service via BOS-Util
    • Third-party tools
      • rclone
      • S3 Browser
      • MinIO
      • Goofys
      • Other Tools
  • Typical Practices
    • Using BOS as Backend Storage Service for Jfrog Artifactory
    • How to Solve Browser Cross-Origin CORS Issues
    • Using HTTPDNS Service via Android SDK
    • Client-Side Encryption Practice
    • BOS Dedicated Line Back-to-Origin IDC Best Practices
    • Presto Practice Based on BOS
    • Accessing BOS via Dedicated Line-VPN in Hybrid Cloud
    • CDN Dynamic Acceleration Uploading Data to BOS
    • HTTPS Transmission Encryption Practice
    • Using CDN to Accelerate BOS
    • Hotlink Protection
    • AWS Lambda Synchronizing S3 Data to BOS
    • Impala Practice Based on BOS
    • Direct Upload of Web Data to BOS
      • Advanced Chapter I - STS Temporary Authentication
      • Basic Chapter - Directly Uploading Files to BOS in the Browser
      • Advanced Chapter II - Handling Older Versions of IE via the PostObject Interface
      • Principle Chapter III - STS Temporary Authentication
      • Principle Chapter I - Directly Uploading Files to BOS in the Browser
      • Principle Chapter II - Upload large file in parts
    • Data Migration
      • Migrating Data from Third-Party Clouds to BOS
      • Migrating Local Data to BOS
      • Scenario overview
    • Mobile Photo Editing App Practice
      • Overview and Scenario Introduction
      • Code example
      • Solution Practice - Building the Photo Editing App
      • Solution Practice - Using the Photo Editing App
    • Accessing BOS via Python API Request
      • Upload File to Bucket via PUT Request
      • Basics (Must-Read) - Generation of authentication string
      • Download Bucket File to Local via GET Request
  • FAQs
    • Certification and permission management
    • Image Service
    • Security Problems
    • Bucket Domain Name Request Style
    • General Problems
    • Object upload-download and management
    • Data Migration and Backup
    • Billing Problems
    • API & SDK & Tools
    • Common Questions Overview
    • Bucket access and management
    • Analysis and Statistic
    • Performance-related questions
  • Video Zone
    • Accessing BOS Resources via Domain Name
    • Object upload
    • Understanding BOS
    • BOS Tiered Storage
  • Quick Start
    • Create bucket
    • Get Object
    • Upload Object
    • Quick Start Guide
    • Getting Started with BOS
    • Delete Object
    • Delete bucket
  • Product pricing
    • Billing Cases
    • Insufficient Balance and Debt Reminder
    • View Consumption Details
    • Billing FAQs
    • Product price
      • Resource Package Price List
      • Pay-As-You-Go Charge Type
      • Pay-As-You-Go Price List
        • Traffic Price
        • Storage prices
        • Data Processing Price
        • Request Price
      • Resource Package Charge Type
        • Resource Package Deduction Rules
        • Resource Package Overview
      • Resource Package Price List - Deprecated
        • Internet downlink traffic package
        • Infrequent access storage package
        • Back-to-origin traffic package
        • Archive storage package
        • Cold storage package
        • Standard storage package
    • Charge Item Introduction
      • Traffic fees
      • Storage Cost
      • Request fees
      • Data processing fees
      • Charge Item Overview
  • SDK
    • SDK Overview
    • Harmony-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • Exception handling
      • Log
      • Bucket management
        • Create Bucket
        • Bucket permission control
        • View the region to which a bucket belongs
        • Bucket Storage Class Setting and Query
        • View bucket list
        • Check if bucket exists
        • Delete bucket
      • Object management
        • Object permission control
        • Multipart upload of objects
        • Get Object
        • View the object in the bucket
        • Copy Object
        • Upload Object
        • Delete Object
    • Ruby-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • SDK Logging
      • Exception handling
      • Bucket management
        • Create Bucket
        • List buckets
        • Overview
        • Bucket permission management
        • View the region to which a bucket belongs
        • Check if bucket exists
        • Delete bucket
      • File management
        • Object permission control
        • Change file storage class
        • Get file download URL
        • Delete file
        • Copy Object
        • Download file
        • Upload files
        • List files in the storage space
        • Get and update file meta information
        • Check if a file exists
    • Python-SDK
      • Overview
      • Version Change Records
      • Initialization
      • FAQs
      • Install the SDK Package
      • Exception handling
      • Log Control
      • Bucket management
        • Bucket cross-origin resource access
        • Create Bucket
        • Bucket Recycle Bin
        • List buckets
        • Overview
        • Bucket Inventory Management
        • Mirror back-to-origin
        • Bucket Lifecycle Management
        • Event notification
        • Set bucket storage class
        • Bucket permission management
        • View the region to which a bucket belongs
        • Close Recycle Bin
        • Logging
        • Data synchronization
        • Get Recycle Bin Activation Information
        • Check if bucket exists
        • User Credit Quota Management
        • Original image protection
        • Delete bucket
      • File management
        • Object permission control
        • Change file storage class
        • Get file download URL
        • Delete file
        • Copy Object
        • Select file
        • Soft links
        • Download file
        • Upload files
        • Restore archived storage class files
        • List files in the storage space
        • Get and update file meta information
        • Check if a file exists
    • JavaScript-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Quota management
      • Bucket management
      • Install SDK
      • Bucket management
        • Data Synchronization Configuration
        • Create Bucket
        • Overview
        • Bucket Logging Management
        • Bucket Lifecycle Management
        • Set bucket storage class
        • Bucket permission management
        • View the region to which a bucket belongs
        • View bucket list
        • Check if bucket exists
        • Delete bucket
      • Object management
        • Multipart upload of objects
        • Get Object
        • View the object in the bucket
        • Copy Object
        • Upload Object
        • Get File URL
        • Delete Object
    • Android-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • Exception handling
      • Bucket management
      • Log
      • Object management
      • Bucket management
        • Create Bucket
        • Bucket permission control
        • View bucket list
        • Check if bucket exists
        • Delete bucket
      • File management
        • Object permission control
        • Multipart upload of objects
        • Get Object
        • View the object in the bucket
        • Copy Object
        • Upload Object
        • Delete Object
    • Java-SDK
      • Overview
      • Version Change Records
      • Initialization
      • File management
      • FAQs
      • Install the SDK Package
      • SDK Logging
      • Exception handling
      • Data Processing and Usage
      • Bucket management
      • Bucket management
        • Bucket static website hosting
        • Recycle bin
        • Bucket data synchronization
        • Create Bucket
        • List buckets
        • Overview
        • Mirror back-to-origin
        • Set Bucket server-side encryption
        • Set bucket storage class
        • Bucket permission management
        • View the region to which a bucket belongs
        • Tag Management
        • Check if bucket exists
        • Original image protection
        • Delete bucket
      • File management
        • Copy files
        • Object permission control
        • Change file storage class
        • Get file download URL
        • Delete file
        • Get directory capacity overview
        • Select file
        • Download file
        • Upload files
        • Restore archived storage class files
        • List files in the storage space
        • Object Tag
        • Get and update file meta information
        • Check if a file exists
    • IOS-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • Exception handling
      • Bucket management
      • Log
      • Object management
      • Bucket management
        • Create New Bucket
        • Determine whether the bucket exists and whether there is permission to access it
        • Bucket permission control
        • View bucket list
        • Delete bucket
      • File management
        • Multipart upload of objects
        • Get Object
        • View the object in the bucket
        • Copy Object
        • Upload Object
        • Delete Object
    • GO-SDK
      • Overview
      • Version Change Records
      • Initialization
      • File management
      • Install the SDK Package
      • SDK Logging
      • Data Processing and Usage
      • Bucket management
      • Request management
      • Error handling
    • C-Dotnet-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • Exception handling
      • Bucket management
      • Object management
    • PHP-SDK
      • Overview
      • Version Change Records
      • Initialization
      • File management
      • Install the SDK Package
      • Exception handling
      • Bucket management
    • C-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Exception handling
      • Install SDK Toolkit
      • Bucket management
        • Create Bucket
        • List Buckets
        • Overview
        • Check If Bucket Exists
        • Delete Bucket
      • File management
        • Copy files
        • Object permission control
        • Change file storage class
        • Delete file
        • Download file
        • Upload files
        • Archive storage
        • Get and Update Metadata Information
        • Get File Download Link
        • List files in the storage space
        • Check if a file exists
    • C++-SDK
      • Overview
      • Version Change Records
      • Initialization
      • Install the SDK Package
      • SDK Logging
      • Exception handling
      • Bucket management
        • Create Bucket
        • List buckets
        • Overview
        • Bucket permission management
        • View the region to which a bucket belongs
        • Check if bucket exists
        • Delete bucket
      • File management
        • Copy files
        • Object permission control
        • Change file storage class
        • Get file download URL
        • Delete file
        • Object Tag Management
        • Download file
        • Upload files
        • Archive storage
        • List files in the storage space
        • Get and update file meta information
        • Check if a file exists
      • Request management
        • Cancel request interruption
  • Product Description
    • Product functions
    • Application scenarios
    • Product advantages
    • Usage restrictions
    • Product introduction
    • Core concepts
    • Tiered Storage Introduction
      • Why Tiered Storage Exists
      • Introduction to storage classes
  • Data Cube
    • Batch processing
    • ZIP packaging and compression
    • Intelligent Data Processing
      • Video processing
        • Video frame capture
        • Instant video transcoding
        • Multimedia cloud processing
        • M3U8 signature
        • Get video metadata
      • Document processing
        • Document preview
      • Image processing
        • Image Processing Introduction
        • Image Processing FAQs
        • Image Processing Terminology Explanation
        • General Image Settings
          • Original image protection
        • Image Processing Guide V2_0
          • Removing Metadata
          • Image Scaling
          • Image Processing Persistence
          • Image Brightness
          • Image Blind Watermark
          • Return Original Image on Failure
          • Getting Image Information
          • Image Blur
          • Usage rules
          • Quality Transformation
          • Format conversion
          • Progressive Display
          • Image Sharpening
          • Grayscale Transformation
          • Image Compression
          • Image Anomaly Detection
          • Image Contrast
          • Image Rotation
            • Normal Rotation
            • Adaptive Rotation
          • Intelligent Processing
            • Intelligent Processing Usage Rules
            • Intelligent Scenarios
              • Lossless magnification
              • Portrait Cartoonization
              • Sky Segmentation
              • Style conversion
              • Black and white coloring
              • Stretch Restoration
              • Object erasure
            • Intelligent Effects
              • Intelligent Contrast
              • Intelligent Sharpness
              • Intelligent defogging
              • Intelligent Color Grading
          • Image Cropping
            • Rounded-corner rectangle cropping
            • Incircle Crop
            • Normal Crop
            • Index Crop
          • Image Watermark
            • Add Image-Text Mixed Watermark
            • Add Text Watermark
            • Add image watermark
        • Image Processing Guide V1_0
          • Image Cropping
          • Getting Image Information
          • Image Thumbnailing
          • Usage rules
          • Quality Transformation
          • Format conversion
          • Watermark
          • Progressive Display
          • Image Rotation
  • Related Agreements
    • Baidu AI Cloud Object Storage (BOS) and Baidu Netdisk Integration Usage Agreement
  • Developer Guide
    • Single-link rate limit
    • Image audit
    • Region and Endpoint
    • Event notification
    • Monitor Service Operations
    • Static website hosting
    • Basic concepts
    • Development Preparation
    • Data Publishing
      • Binding Custom Domain Name
      • CDN Acceleration Publishing
    • Data Disaster Recovery
      • Multi-AZ storage
      • Data synchronization
    • Data Security
      • Set anti-stealing-link
      • Set bucket trash
      • Set server-side encryption
      • Principle of least privilege
      • Permission control
        • Object permission control
        • Bucket permission control
        • IAM primary-IAM user access control
      • Versioning
        • Deletion Mark
        • Versioning Overview
    • Bucket Basic Operations
      • Create bucket
      • Data Publishing
      • Obtaining Bucket Region Information
      • Managing Lifecycle
      • Set access logs
      • Setting Bucket Tag
      • Setting Cross-Origin Resource Sharing (CORS)
      • View bucket list
      • Delete bucket
    • Data lifecycle management
      • Intelligent Business Analysis
    • Data Migration to Cloud
      • Migration from other clouds
      • Local data to cloud
      • Scenario overview
    • Data lake access
      • Hierarchical namespace
      • Metadata Conversion Service
    • Object Basic Operations
      • Managing Files
        • Copy data
        • Select scanning
        • Delete data
        • Obtaining Data Metadata
        • Viewing File List
        • Object Tag
      • Uploading Data
        • Simple upload
        • Append upload
        • Form upload
        • Upload callback
        • Chunking and Resumable Upload
      • Downloading Data
        • Simple Download
        • Resumable download
  • Data Lake Storage
    • Big Data Component Usage Guide
      • HBase Uses BOS as Underlying Storage
      • Kafka Data Storage to BOS
      • Hive Usage Guide
      • Presto Usage Guide
      • Spark Usage Guide
      • Flume Data Storage to BOS
      • Flink Usage Guide
      • Impala Usage Guide
      • Fluentd Collects Data Storage to BOS
      • Logstash Data Storage to BOS
      • Elasticsearch Snapshot Data Storage to BOS
      • Druid Uses BOS as Deep Storage
    • BOS HDFS tool
      • Overview
      • FAQs
      • Configuration and Usage
    • Data Migration and Transfer
      • Migrate Data to Hierarchical Namespace Bucket Using DistCp
      • DataX Read and Write BOS
    • Hierarchical namespace
      • Usage method
      • Service Introduction
      • Convert Normal Bucket to Hierarchical Namespace Bucket
      • Function Support Description
  • Document center
  • arrow
  • BOS
  • arrow
  • SDK
  • arrow
  • Python-SDK
  • arrow
  • File management
  • arrow
  • Check if a file exists

Check if a file exists

Updated at：2025-11-03

Users can check if a file exists through the following operations:

Python 
1from baidubce import exception
2try:
3	response = bos_client.get_object_meta_data(bucket_name, object_key)
4	print("Get meta:{}",response.metadata)
5except exception.BceError as e:
6	print(e)

Previous
Get and update file meta information
Next
JavaScript-SDK