问：Linkedin Vector Assest API，注册分段上传 - 响应中没有元数据值

如何解决问：Linkedin Vector Assest API，注册分段上传 - 响应中没有元数据值

我正在尝试使用 Linkedin V2 Vector Assets 完成分段上传，我注意到在注册上传时，metadata 字段在响应中变回空白。

这是注册上传的请求 https://api.linkedin.com/v2/assets?action=registerUpload

{
    "registerUploadRequest":{
        "owner":"urn:li:organization:71736744","recipes":["urn:li:digitalmediaRecipe:feedshare-video"],"serviceRelationships":[
            {"identifier":"urn:li:userGeneratedContent","relationshipType":"OWNER"}
        ],"supportedUploadMechanism":["MULTIPART_UPLOAD"],"fileSize":50866165
}

这是响应（删除了除一个 partUploadRequests 对象之外的所有对象以使响应更易于阅读）

{
"value": {
    "uploadMechanism": {
        "com.linkedin.digitalmedia.uploading.MultipartUpload": {
            "partUploadRequests": [
                {
                    "headers": {
                        "Content-Type": "application/octet-stream"
                    },"byteRange": { "lastByte": 4194303,"firstByte": 0 },"url": "https://www.linkedin.com/dms-uploads/C5605AQFnYcNsf7K5Yw/uploadedVideo?sau=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&pn=1&m=616825227&app=86804616&sync=0&v=beta&ut=1nBLJxAvwH5FI1","urlExpiresAt": 1616544717116
                } ...
            ],"metadata": ""
        }
    },"asset": "urn:li:digitalmediaAsset:C5605AQFnYcNsf7K5Yw","mediaArtifact": "urn:li:digitalmediaMediaArtifact:(urn:li:digitalmediaAsset:C5605AQFnYcNsf7K5Yw,urn:li:digitalmediaMediaArtifactClass:uploadedVideo)"
}

}

api 文档说明我需要使用注册上传响应中的元数据值到 complete the upload

我尝试在没有元数据字段值为 https://api.linkedin.com/v2/assets?action=completeMultiPartUpload 的情况下发出请求（删除了除一个 partUploadResponses 对象之外的所有对象以使响应更易于阅读）

{
"completeMultipartUploadRequest": {
    "mediaArtifact": "urn:li:digitalmediaMediaArtifact:(urn:li:digitalmediaAsset:C5605AQFnYcNsf7K5Yw,urn:li:digitalmediaMediaArtifactClass:uploadedVideo)","metadata": "","partUploadResponses": [
        {
            "headers": {
                "ETag": "/ambry-video/signedId/AQGpSasdC3ezCgAAAXhcbTobXlB6_ujllr8BPUUAX4o9OgbHCxiRKoG9woM85dnGrxbUbd-5IXyMKO7syqyZXLgHFd8GQJkiMvvp1eHI9N32iJqMG-l_aFgSeXMbcqkFFcjuT22djM93dmKs_RBb58kppS3CadOPHSt5_tApCxAq0wgTfYQng3OkV_uVRdjIYftyfnHW3nF2vWz4hZBoX-YhmF6gDhXtN9dNTnU4QpHB7sGCecpjYgT8ypV-u5isvFrujHl3tl4.bin"
            },"httpStatusCode": 200
        } ....
    ]
}

}

返回 200OK，没有任何预期的响应主体。

之后，我检查了上传状态，返回的代码为 SERVER_ERROR，但我无法使用上传资产的 asset id 创建帖子。 检查资产状态的响应 https://api.linkedin.com/v2/assets/C5605AQFnYcNsf7K5Yw

{
"recipes": [
    {
        "recipe": "urn:li:digitalmediaRecipe:feedshare-video","status": "SERVER_ERROR"
    }
],"serviceRelationships": [
    {
        "relationshipType": "OWNER","identifier": "urn:li:userGeneratedContent"
    }
],"mediaTypeFamily": "VIDEO","created": 1616458317042,"id": "C5605AQFnYcNsf7K5Yw","lastModified": 1616458454711,"status": "ALLOWED"

}

请求创建一个包含资产 https://api.linkedin.com/v2/assets 的 UGC 帖子

{
"author": "urn:li:organization:71736744","lifecycleState": "PUBLISHED","specificContent": {
    "com.linkedin.ugc.ShareContent": {
        "media": [
            {
                "media": "urn:li:digitalmediaAsset:C5605AQFnYcNsf7K5Yw","status": "READY","title": {
                    "attributes": [],"text": "Sample Video Create"
                }
            }
        ],"shareCommentary": {
            "attributes": [],"text": "Some share text"
        },"shareMediaCategory": "VIDEO"
    }
},"visibility": {
    "com.linkedin.ugc.MemberNetworkVisibility": "PUBLIC"
}

响应请求

{
"serviceErrorCode": 0,"message": "Resource assets does not exist","status": 404}

我唯一能想到的是，因为我在完成上传时没有元数据值，所以我无法在 UGC 帖子中使用视频资产。有没有人遇到过类似的问题？

进一步调查 在进一步调查中，API 文档中的示例也不返回 metadata 字段。所以这就是我认为可能发生的事情

• 我没有正确上传文件块，完成上传不需要 metadata 字段。
• API 中存在一个错误，导致它在注册分段上传时无法返回元数据字段。

解决方法

想通了，当使用 slice 方法将文件分成块时，它需要 file.slice(firstByte,lastByte + 1)

似乎也不需要注册上传请求中的元数据值来完成上传。