无法使用 Mapbox“创建上传”api 上传数据文件

Question

我正在尝试使用他们的upload api 将我的本地 json 文件上传到 mapbox。我正在执行以下步骤：

1. 检索 S3 凭据以暂存文件
2. 使用 S3 客户端（如 AWS 开发工具包）通过这些凭证将文件上传到 S3
3. 使用暂存文件的 URL 创建上传文件
4. 在上传文件被处理成瓦片集时检索上传的状态
5. 上传完成后，像使用任何其他图块集一样使用图块集 ID。

我完成了第 1 步和第 2 步，但在第 3 步时出现以下错误：

远程服务器返回错误：(422) Unprocessable Entity。

以下是我的代码（第 1 步）：

class Program
{
    static void Main(string[] args)
    {
        var getCredsUrl= @"https://api.mapbox.com/uploads/v1/{my_mapbox_username}/credentials?access_token={my_mapbox_token}";
        var request = (HttpWebRequest)WebRequest.Create(getCredsUrl);
        request.AutomaticDecompression = DecompressionMethods.GZip;
        using (var response = (HttpWebResponse)request.GetResponse())
        using (var stream = response.GetResponseStream())
            if (stream != null)
                using (var reader = new StreamReader(stream))
                {
                    var res = reader.ReadToEnd();
                    var mbS3Credentials = JObject.Parse(res);
                    var accessKeyId = (string)mbS3Credentials["accessKeyId"];
                    var bucket = (string)mbS3Credentials["bucket"];
                    var key = (string)mbS3Credentials["key"];
                    var secretAccessKey = (string)mbS3Credentials["secretAccessKey"];
                    var sessionToken = (string)mbS3Credentials["sessionToken"];
                    var serviceUrl = (string)mbS3Credentials["url"];

                    var localFilePath = "c:\\users\\saurabh\\documents\\visual studio 2015\\Projects\\MapboxTileSetUpload\\MapboxTileSetUpload\\data\\localFile.json";
                    var amazonS3Uploader = new AmazonS3Uploader(accessKeyId, secretAccessKey, sessionToken, serviceUrl + "localFile.json");
                    var suucess = amazonS3Uploader.UploadFile(localFilePath, bucket, key);
                    if (suucess)
                    {
                        string createUploadUrl =
                            @"https://api.mapbox.com/uploads/v1/{my_mapbox_username}?access_token={my_mapbox_token}";
                        string tileSet = "{my_mapbox_username}.myTileSet";
                        string s3BucketFileUrl = serviceUrl + "/localFile.json";
                        string name = "example-dataset";
                        var createUpload = new MapboxUploader(createUploadUrl, tileSet, s3BucketFileUrl, name);
                        createUpload.CreateUpload();
                    }
                }
    }
}

上传到 Amazon S3（第 2 步）：

public class AmazonS3Uploader
{
    private readonly AmazonS3Client _s3Client;

    public AmazonS3Uploader(string accessKeyId, string secretAccessKey, string sessionToken, string serviceUrl)
    {
        var s3Config = new AmazonS3Config
        {
            ServiceURL = serviceUrl, RegionEndpoint = RegionEndpoint.USEast1,
            ForcePathStyle = true,
        };
        _s3Client = new AmazonS3Client(accessKeyId, secretAccessKey, sessionToken, s3Config);
    }


    public bool UploadFile(string filePath, string s3BucketName, string key)
    {
        //save in s3
        var s3PutRequest = new PutObjectRequest
        {
            FilePath = filePath, BucketName = s3BucketName,
            Key = key, CannedACL = S3CannedACL.PublicRead
        };

        s3PutRequest.Headers.Expires = new DateTime(2020, 1, 1);

        try
        {
            PutObjectResponse s3PutResponse = this._s3Client.PutObject(s3PutRequest);
            if (s3PutResponse.HttpStatusCode.ToString() == "OK")
                return true;
            else
                return false;
        }
        catch (Exception ex)
        {
            //handle exceptions
            return false;
        }
    }
}

创建 Mapbxo 上传（第 3 步：出现错误）：

public class MapboxUploader
{
    private readonly string _createUploadUrl;
    private readonly string _tileSet;
    private readonly string _s3Fileurl;
    private readonly string _name;
    public MapboxUploader(string createUploadUrl, string tileSet, string s3BucketFileUrl, string name)
    {
        _createUploadUrl = createUploadUrl; _tileSet = tileSet;
        _s3Fileurl = s3BucketFileUrl; _name = name;
    }

    public async Task<bool> HttpClient()
    {
        using (var client = new WebClient())
        {    
            client.BaseAddress = new Uri(this._createUploadUrl);
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            Dictionary<string, string> data = new Dictionary<string, string>() { { "tileset", this._tileSet }, { "url", this._s3Fileurl }, { "name", this._name } };
            var postData = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json");
            try
            {
                var response = await client.PostAsync(this._createUploadUrl, postData);
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }                
        }
    }
}

我的猜测是我无法在第 2 步将文件上传到 S3 存储桶。这是第 2 步的响应：

在第 3 步，我收到一个无法处理的错误，并显示错误消息 Could not access url 所以我猜我的 S3 存储桶文件无法访问。

当我尝试将上传的文件 S3 存储桶 URL 输入到浏览器时，我收到拒绝访问错误：

Mapbox 访问令牌范围：

我在这里缺少什么。

Answer 1

您的错误出现在这一行的第 1 步中：

string s3BucketFileUrl = serviceUrl + "/localFile.json";

文件名"/localFile.json" 不存在，因为 aws 已经为您提供了文件所在的完整路径