如何解决上传文件到S3时返回400错误

Question

this is my code:              
        const Aws::String bucket = "cct-.........-test";        
        const Aws::String filename = "tc.wav";        
        Aws::Auth::AWSCredentials credentials("................................", "................................");        
        Aws::S3::S3ClientConfiguration config;        
        config.region = "us-east-1";        
        config.scheme = Aws::Http::Scheme::HTTP;        
        config.useVirtualAddressing = false;        
        config.endpointOverride = "oss.........com";        
        std::shared_ptr inputData = Aws::MakeShared("SampleAllocationTag", filename.c_str(), std::ios_base::in | std::ios_base::binary);        
        if (!*inputData) { std::cerr << "Error unable to read file " << filename << std::endl;  return 1;  }        
        struct stat file_stat;        
        stat(filename.c_str(), &file_stat);         
        auto filesize = file_stat.st_size;         
        inputData->seekg(0, std::ios::beg);        
        Aws::S3::Model::PutObjectRequest request;        
        request.SetBucket(bucket);        
        request.SetKey(filename);        
        request.SetBody(inputData);        
        request.SetContentLength(filesize);        
        request.SetContentType("audio/wav");        
        Aws::S3::S3Client s3_client(credentials, config, Aws::Client::AWSAuthV4Signer::PayloadSigningPolicy::Always, false);        
        Aws::S3::Model::PutObjectOutcome outcome = s3_client.PutObject(request);        
        if (!outcome.IsSuccess()) {        
            std::cerr << "Error: PutObject: " << outcome.GetError().GetMessage() << " | " << outcome.GetError().GetExceptionName() << std::endl;        
        }        
the log output http400        
[INFO] 2025-06-01 07:02:25.684 Aws_Init_Cleanup [.................] Initiate AWS SDK for C++ with Version:1.11.577        
[DEBUG] 2025-06-01 07:02:25.812 CURL [................] (HeaderOut) PUT /cct-record-test/tc.wav HTTP/1.1        
Accept: */*        
amz-sdk-invocation-id: 9BC5ABBE-19A2-417E-A64E-097C6AC5958C        
amz-sdk-request: attempt=1        
authorization: AWS4-HMAC-SHA256 Credential=......................., SignedHeaders=amz-sdk-invocation-id;amz-sdk-request;content-encoding;content-type;host;x-amz-content-sha256;x-amz-date;x-amz-decoded-content-length;x-amz-trailer, Signature=94a14a5679eb9a841eb906e47583e535291b3f1df5541e50c5ba98e5bf1a9da0
content-encoding: aws-chunked        
content-type: audio/wav        
host: oss.17usoft.com        
transfer-encoding: chunked        
user-agent: aws-sdk-cpp/1.11.577 ua/2.1 api/S3 os/Linux#3.10.0-957.21.3.el7.x86_64 lang/c++#C++11 md/aws-crt#0.32.4 md/arch#x86_64 md/GCC#9.3.1 m/D,W,Z,b,P        
x-amz-content-sha256: STREAMING-UNSIGNED-PAYLOAD-TRAILER        
x-amz-date: 20250601T070225Z        
x-amz-decoded-content-length: 1520460        
x-amz-trailer: x-amz-checksum-crc64nvme        
Expect: 100-continue        
[DEBUG] 2025-06-01 07:02:25.847 CURL [...........] (HeaderIn) HTTP/1.1 400 Bad Request        
[ERROR] 2025-06-01 07:02:25.847 AWSXmlClient [...........] HTTP response code: 400        
Resolved remote host IP address: 123..........7        
Request ID:        
Exception name:        
Error message: No response body.        
6 response headers:        
connection : close        
content-length : 0        
date : Sun, 01 Jun 2025 07:02:25 GMT        
server : Lego Server        
x-cache-lookup : Return Directly        
x-nws-log-uuid : 16880156800366600205        
[WARN] 2025-06-01 07:02:25.847 AWSClient [.............] If the signature check failed. This could be because of a time skew. Attempting to adjust the signer.        
[DEBUG] 2025-06-01 07:02:25.847 AWSClient [.....................] Server time is Sun, 01 Jun 2025 07:02:25 GMT, while client time is Sun, 01 Jun 2025 07:02:25 GMT        
Can someone help me see where the problem is? I can upload successfully using the aws cli tool, which means the server, KEY, and endpoint are correct but my code doesn't work. I can't see more useful information from the log.

burne · Answer

The time recorded in the logs is GMT, and the time on my local machine is CST,     
which could be a problem, but I don't know how unify the time to CST,     
the logs output by the aws cli are also CST time.

re:Post Agent · Answer

您遇到的 S3 上传 400 错误可能有几个原因。根据您提供的代码和日志，我注意到几个可能的问题点：

1. 端点配置问题：您使用了自定义端点 `oss.........com`，但同时设置了 `config.useVirtualAddressing = false`。S3 默认使用虚拟寻址风格，如果您的端点需要路径风格寻址，这个设置是正确的，但可能与您的端点要求不匹配。

2. 认证问题：日志中显示 "If the signature check failed. This could be because of a time skew"，这表明可能存在签名验证失败的问题。虽然日志显示客户端和服务器时间似乎一致，但签名计算可能仍有问题。

3. 硬编码凭证：您在代码中直接硬编码了 AWS 凭证，这不是最佳实践。在 Lambda 或其他 AWS 服务中运行时，应该使用执行角色的权限而不是硬编码凭证。

4. 区域与端点不匹配：您设置了 `us-east-1` 区域，但使用了自定义端点。确保这两者是兼容的。

5. HTTP 协议：您使用了 `Aws::Http::Scheme::HTTP` 而不是 HTTPS，S3 通常需要 HTTPS 连接。

建议的解决方案：

1. 尝试使用 HTTPS 而不是 HTTP：
```cpp
config.scheme = Aws::Http::Scheme::HTTPS;
```

2. 检查虚拟寻址设置是否与您的端点兼容：
```cpp
config.useVirtualAddressing = true; // 或根据您的端点要求设置
```

3. 如果在 AWS Lambda 中运行，移除硬编码凭证，让代码使用 Lambda 执行角色：
```cpp
Aws::S3::S3Client s3_client(config);
```

4. 确保区域设置与您的端点匹配。

5. 检查您的桶名称和文件路径是否正确。

由于您提到可以使用 AWS CLI 成功上传，这表明权限和端点配置基本正确。问题可能在于 SDK 的具体配置或签名计算方式与 CLI 不同。尝试以上建议，特别是切换到 HTTPS 和调整虚拟寻址设置，可能会解决您的问题。  
**Sources**  
[Use PutObject with an AWS SDK or CLI - Amazon Simple Storage Service](https://docs.aws.amazon.com/AmazonS3/latest/API/s3_example_s3_PutObject_section.html)  
[The request signature we calculated does not match the signature you provided. Check your key and signing method. I get this error only when i use lambda function. Their is no issue in local server | AWS re:Post](https://repost.aws/questions/QUL9e2HmUGQrmV1aQYHx2m2A/the-request-signature-we-calculated-does-not-match-the-signature-you-provided-check-your-key-and-signing-method-i-get-this-error-only-when-i-use-lambda-function-their-is-no-issue-in-local-server)  
[Use PutObject with an AWS SDK or CLI - AWS SDK Code Examples](https://docs.aws.amazon.com/code-library/latest/ug/s3_example_s3_PutObject_section.html)

burne · Answer

if use   
>config.useVirtualAddressing = true;

then    
>Error: PutObject: curlCode: 6, Couldn't resolve host name; Details: Could not resolve host: cct-***-test.oss.***.com; Unknown error

The same return when using HTTPS, and the awl cli test uses the http address.

如何解决上传文件到S3时返回400错误

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