Torch Object Storage
Torch Object Storage
Torch Object Storage
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Signature Mechanism
The header contains a signature
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Java
Pre-signing Mechanism
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Python
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Introduction to typical scenes
C
Object Interface
Upload object
C++
Pre-signature Mechanism
Bucket Interface
Basic Bucket Interface
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Object Interface
Upload Object
Download Object
Copy Object
List Objects
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Go
Object Interface
Upload Object
Download Object
Copy Object
List Objects
Manage Objects
Bucket Interface
Manage Bucket Configuration
Data Processing
Log Configuration
Introduction to Typical Scenes
Pre-signature Mechanism
Node.js
Pre-signature Mechanism
Bucket Interface
Basic Bucket Interface
Manage Bucket Configuration
Object Interface
Upload object
Download object
Copy object
List objects
Data Processing
Image Processing
Introduction to Typical Scenes
Browser.js
Pre-signature Mechanism
Upload Object
Download Object
Copy Object
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Manage Objects
Data Processing
.NET
Bucket Interface
Object Interface
Upload Object
Download Object
List Objects
Introduction to Typical Scenes
PHP
Bucket Interface
Object Interface
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Android
Bucket Interface
Object Interface
Upload Object
Download Object
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iOS
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Harmony
Pre-signature Mechanism
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Object Interface
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Download Object
List Objects v2
Introduction to Typical Scenarios
Rust
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Static website hosting
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Object interface
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Error Codes
01-SERVICE_ERROR
02-AUTH
03-ACCESS_CONTROL
04-QOS
05-REQUEST
06-BUCKET
07-LIFECYCLE
08-ACL
09-CORS
10-POLICY
11-MIRROR
12-REPLICATION
13-WEBSITE
14-NOTIFICATION
15-ENCRYPT
16-CUSTOMDOMAIN
17-OBJECT
18-TAG
19-MULTIPART
20-STORAGE_CLASS
21-CALLBACK
22-DATA_PROCESS
23-BATCH
24-STORAGE_LENS
25-INVENTORY
26-DIRECTORY_BUCKET
FAQ
Best Practices
AIGC-Doubao LLMs
Accessing TOS with third-party tools
Granting temporary access
Data migration
Data processing
Checking data integrity
Performance optimization
- Documentation
Torch Object StorageSDK ReferenceGoObject InterfaceManage ObjectsDetermining Object Existence (Go SDK)
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Download PDFManage Objects
Determining Object Existence (Go SDK)
Copy pageDownload PDFDetermining Object Existence (Go SDK)
You can determine whether an object exists by using the Go SDK's HeadObject interface.
Precautions
To determine whether an object exists, your account must have the tos:GetObject permission. For detailed instructions, please refer to the Permission Configuration Guide.
Sample Code
The following code demonstrates how to determine whether an object exists.
package main
import (
"context"
"fmt"
"net/http"
"github.com/volcengine/ve-tos-golang-sdk/v2/tos"
)
func checkErr(err error) {
if err != nil {
if serverErr, ok := err.(*tos.TosServerError); ok {
fmt.Println("Error:", serverErr.Error())
fmt.Println("Request ID:", serverErr.RequestID)
fmt.Println("Response Status Code:", serverErr.StatusCode)
fmt.Println("Response Header:", serverErr.Header)
fmt.Println("Response Err Code:", serverErr.Code)
fmt.Println("Response Err Msg:", serverErr.Message)
} else if clientErr, ok := err.(*tos.TosClientError); ok {
fmt.Println("Error:", clientErr.Error())
fmt.Println("Client Cause Err:", clientErr.Cause.Error())
} else {
fmt.Println("Error:", err)
}
panic(err)
}
}
func main() {
var (
accessKey = os.Getenv("TOS_ACCESS_KEY")
secretKey = os.Getenv("TOS_SECRET_KEY")
endpoint = "https://tos-cn-beijing.volces.com"
region = "cn-beijing"
bucketName = "*** Provide your bucket name ***"
objectKey = "example_dir/example.txt"
ctx = context.Background()
)
client, err := tos.NewClientV2(endpoint, tos.WithRegion(region), tos.WithCredentials(tos.NewStaticCredentials(accessKey, secretKey)))
checkErr(err)
output, err := client.HeadObjectV2(ctx, &tos.HeadObjectV2Input{
Bucket: bucketName,
Key: objectKey,
})
if err != nil {
if serverErr, ok := err.(*tos.TosServerError); ok {
if serverErr.StatusCode == http.StatusNotFound {
fmt.Println("Object not found.")
} else {
fmt.Println("Error:", serverErr.Error())
fmt.Println("Request ID:", serverErr.RequestID)
fmt.Println("Response Status Code:", serverErr.StatusCode)
fmt.Println("Response Header:", serverErr.Header)
fmt.Println("Response Err Code:", serverErr.Code)
fmt.Println("Response Err Msg:", serverErr.Message)
panic(err)
}
} else {
panic(err)
}
}
fmt.Println("HeadObjectV2 Request ID:", output.RequestID)
fmt.Println("HeadObjectV2 Response ContentLanguage:", output.ContentLanguage)
fmt.Println("HeadObjectV2 Response ContentDisposition:", output.ContentDisposition)
fmt.Println("HeadObjectV2 Response ContentEncoding:", output.ContentEncoding)
fmt.Println("HeadObjectV2 Response CacheControl:", output.CacheControl)
fmt.Println("HeadObjectV2 Response ContentType:", output.ContentType)
fmt.Println("HeadObjectV2 Response Expires:", output.Expires)
}
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Last updated: 2025.09.19 17:30:21
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