csharp-sdk-upm/Storage/LCFile.cs

128 lines
4.1 KiB
C#

using System;
using System.IO;
using System.Collections.Generic;
using System.Threading.Tasks;
using LeanCloud.Storage.Internal.File;
using LeanCloud.Storage.Internal.Object;
using LeanCloud.Common;
namespace LeanCloud.Storage {
public class LCFile : LCObject {
public const string CLASS_NAME = "_File";
public string Name {
get {
return this["name"] as string;
} set {
this["name"] = value;
}
}
public string MimeType {
get {
return this["mime_type"] as string;
} set {
this["mime_type"] = value;
}
}
public string Url {
get {
return this["url"] as string;
} set {
this["url"] = value;
}
}
public Dictionary<string, object> MetaData {
get {
return this["metaData"] as Dictionary<string, object>;
} set {
this["metaData"] = value;
}
}
readonly byte[] data;
public LCFile() : base(CLASS_NAME) {
MetaData = new Dictionary<string, object>();
}
public LCFile(string name, byte[] bytes) : this() {
Name = name;
data = bytes;
}
public LCFile(string name, string path) : this() {
Name = name;
MimeType = LCMimeTypeMap.GetMimeType(path);
data = File.ReadAllBytes(path);
}
public LCFile(string name, Uri url) : this() {
Name = name;
Url = url.AbsoluteUri;
}
public void AddMetaData(string key, object value) {
MetaData[key] = value;
}
public async Task<LCFile> Save(Action<long, long> onProgress = null) {
if (!string.IsNullOrEmpty(Url)) {
// 外链方式
await base.Save();
} else {
// 上传文件
Dictionary<string, object> uploadToken = await GetUploadToken();
string uploadUrl = uploadToken["upload_url"] as string;
string key = uploadToken["key"] as string;
string token = uploadToken["token"] as string;
string provider = uploadToken["provider"] as string;
if (provider == "s3") {
// AWS
LCAWSUploader uploader = new LCAWSUploader(uploadUrl, MimeType, data);
await uploader.Upload(onProgress);
} else if (provider == "qiniu") {
// Qiniu
LCQiniuUploader uploader = new LCQiniuUploader(uploadUrl, token, key, data);
await uploader.Upload(onProgress);
} else {
throw new Exception($"{provider} is not support.");
}
LCObjectData objectData = LCObjectData.Decode(uploadToken);
Merge(objectData);
}
return this;
}
public new async Task Delete() {
if (string.IsNullOrEmpty(ObjectId)) {
return;
}
string path = $"files/{ObjectId}";
await LCApplication.HttpClient.Delete(path);
}
public string GetThumbnailUrl(int width, int height, int quality = 100, bool scaleToFit = true, string format = "png") {
int mode = scaleToFit ? 2 : 1;
return $"{Url}?imageView/{mode}/w/{width}/h/{height}/q/{quality}/format/{format}";
}
async Task<Dictionary<string, object>> GetUploadToken() {
Dictionary<string, object> data = new Dictionary<string, object> {
{ "name", Name },
{ "key", Guid.NewGuid().ToString() },
{ "__type", "File" },
{ "mime_type", MimeType },
{ "metaData", MetaData }
};
return await LCApplication.HttpClient.Post<Dictionary<string, object>>("fileTokens", data: data);
}
public static LCQuery<LCFile> GetQuery() {
return new LCQuery<LCFile>(CLASS_NAME);
}
}
}