與儲存在 Liferay 的文件一起工作

Liferay Portal 是一個開放原始碼的企業入口網站軟體平台,旨在開發網路入口網站和網站。 Liferay 在其入口網站平台中提供文件管理系統,讓使用者能夠以合作和有效的方式建立、組織、儲存及管理文件。 常常被稱為Liferay 文檔圖書館的文檔管理功能。

在這篇文章中,我們將涵蓋比較文件與媒體圖書館中上傳的文件以及上傳結果文件的常見情境。

預設值

  1. 以執行 Docker 來啟動新的 Liferay Portlet:

           docker run -it -m 8g -p 8080:8080 liferay/portal:7.4.3.92-ga92
       

    如果你沒有 Docker,先做 install it。 您可以使用 Liferay Portal docker 的另一版本。

2。 登入 Liferay 使用電子郵件地址 test@liferay.com 和密碼 test。 3。 當被提示時,更改密碼。 4. 透過 this tutorial 取得網站標識符。 5. 購買 Aspose.Words 許可證或使用 Free Trial or 30-day Temporary License.

創建控制台應用程式

要評估 .NET 的Aspose.Words如何與Liferay 文檔和媒體圖書館一起使用,您需要建立一個具有正確設定值的主控台應用程式,並實作將文檔上傳至文檔和媒體圖書館根目錄、下載這些文檔、處理該文檔,然後再將結果上傳回文檔和媒體圖書館根目錄的邏輯。 要做到這點,請按照本節所述的指示進行。

要執行這些指令,您必須找到並修正以下變數的值,而這些變數在完成『預設』部分中的步驟後會可用到:

“- 網站識別碼”

  • 使用者登入 “- 用戶密碼”
  • 基本入口網址
  • Aspose.Words 許可證檔案的路徑

建立新的控制台應用程式專案

要建立新的 konsol 應用程式專案,請按照以下步驟動作:

  1. 在 Visual Studio 中,為 C# 語言和 Target Framework .NET 6 建立名為 “LiferayExample” 的新的控制台應用程式專案。
  2. 加入以下套件:
    • Newtonsoft.Json “- IdentityModel”
    • Aspose.Words

將文件加入比較

在專案中建立一個Doc的資料夹並添加檔案DocumentA.docx和DocumentA.docx。

為 REST API 處理添加 JSON 模型類

在專案中建立JsonModel的文件夹。 在專案中建立一個名為DownloadResponse.cs的檔案,並將其內容填寫如下:

.NET

using Newtonsoft.Json;

namespace LiferayExample.JsonModel
{
    [JsonObject(ItemNullValueHandling = NullValueHandling.Ignore)]
    public class DownloadResponse
    {
        [JsonProperty(PropertyName = "contentValue")]
        public string ContentValue { get; set; }
    }
}

在專案中建立名為 “FileMetadata.cs” 的檔案,並輸入以下內容:

.Net

using Newtonsoft.Json;

namespace LiferayExample.JsonModel
{
    [JsonObject(ItemNullValueHandling = NullValueHandling.Ignore)]
    public class FileMetadata
    {
        [JsonProperty(PropertyName = "siteId")]
        public string SiteId { get; set; }

        [JsonProperty(PropertyName = "sizeInBytes")]
        public int SizeInBytes { get; set; }

        [JsonProperty(PropertyName = "fileName")]
        public string FileName { get; set; }

        [JsonProperty(PropertyName = "id")]
        public string Id { get; set; }
    }
}

在專案中建立一個名為UploadResponse.cs的檔案,並用以下內容填寫:

'.NET'

using Newtonsoft.Json;

namespace LiferayExample.JsonModel
{
    [JsonObject(ItemNullValueHandling = NullValueHandling.Ignore)]
    public class UploadResponse : FileMetadata { }
}

在專案中建立名為 “GetFileInfoByNameResponse.cs” 的檔案,並將其內容填寫如下:

.NET

using Newtonsoft.Json;

namespace LiferayExample.JsonModel
{
    [JsonObject(ItemNullValueHandling = NullValueHandling.Ignore)]
    public class GetFileInfoByNameResponse
    {
        [JsonProperty(PropertyName = "items")]
        public FileMetadata[] FilesData { get; set; }
    }
}

加入 Liferay REST API 用戶端

在專案中建立一個名為SecurityContext.cs的檔案,並以以下內容填寫:

".NET"

namespace LiferayExample
{
    public record SecurityContext(string SiteId, string Login, string Password);
}

在專案中建立名為DocumentClient.cs的檔案,並用以下內容填寫:

.Net

using Newtonsoft.Json;
using LiferayExample.JsonModel;

namespace LiferayExample
{
    /// <summary>
    /// Implements logic to communicate with Liferay over REST requests.
    /// </summary>
    public sealed class DocumentClient : IDisposable
    {
        private readonly string _portalBaseUrl;
        private readonly HttpClient _httpClient;
        private readonly SecurityContext _context;

        private string _className => nameof(DocumentClient);
        private string _documentAPIUrl => $"{_portalBaseUrl}/o/headless-delivery/v1.0";

        /// <summary>
        /// Client constructor.
        /// </summary>
        public DocumentClient(string portalBaseUrl, SecurityContext context)
        {
            _context = context;
            _portalBaseUrl = portalBaseUrl;
            _httpClient = new HttpClient();
        }

        /// <summary>
        /// Uploads the file to "Documents and Media" root folder with specified name.
        /// </summary>
        /// <remarks>
        /// Overrides the file with the same name in Liferay.
        /// </remarks>
        public async Task<UploadResponse> Upload(Stream file, string fileName)
        {
            var fileInfo = await GetFileInfoByName(fileName);

            if (fileInfo != null)
                await DeleteDocument(fileInfo.Id);

            var uploadFileUrl = $"{_documentAPIUrl}/sites/{_context.SiteId}/documents";
            using var request = GetApiRequest(HttpMethod.Post, uploadFileUrl);

            using var formContent = new MultipartFormDataContent
            {
                { new StreamContent(file), "file", fileName }
            };

            request.Content = formContent;

            using var response = await _httpClient.SendAsync(request);
            response.EnsureSuccessStatusCode();

            var responseJson = await response.Content.ReadAsStringAsync();
            var uploadResponse = JsonConvert.DeserializeObject<UploadResponse>(responseJson);

            if (uploadResponse == null)
                throw new Exception($"{_className}.{nameof(Upload)}: Unexpected response format: {responseJson}.");

            return uploadResponse;
        }

        /// <summary>
        /// Downloads document from "Documents and Media" library.
        /// </summary>
        public async Task<Stream> Download(string fileId)
        {
            var downloadFileUrl =
                $"{_documentAPIUrl}/documents/{fileId}?nestedFields=contentValue&fields=contentValue";
            using var request = GetApiRequest(HttpMethod.Get, downloadFileUrl);

            using var response = await _httpClient.SendAsync(request);
            response.EnsureSuccessStatusCode();

            var responseJson = await response.Content.ReadAsStringAsync();
            var downloadResponse = JsonConvert.DeserializeObject<DownloadResponse>(responseJson);

            if (string.IsNullOrWhiteSpace(downloadResponse?.ContentValue))
                throw new Exception($"{_className}.{nameof(Download)}: Unexpected response format: {responseJson}.");

            var fileData = Convert.FromBase64String(downloadResponse.ContentValue);
            if (fileData == null)
                throw new Exception($"{_className}.{nameof(Download)}: Can not convert received data to binary array.");

            return new MemoryStream(fileData);
        }

        /// <summary>
        /// Disposes client resources.
        /// </summary>
        public void Dispose()
        {
            _httpClient?.Dispose();
        }

        private async Task<FileMetadata> GetFileInfoByName(string fileName)
        {
            var getFileUrl = $"{_documentAPIUrl}/sites/{_context.SiteId}/documents?search={Uri.EscapeDataString($"{fileName}")}";

            using var request = GetApiRequest(HttpMethod.Get, getFileUrl);

            using var response = await _httpClient.SendAsync(request);
            response.EnsureSuccessStatusCode();

            var responseJson = await response.Content.ReadAsStringAsync();
            var fileInfos = JsonConvert.DeserializeObject<GetFileInfoByNameResponse>(responseJson);

            if (fileInfos?.FilesData == null)
                throw new Exception($"{_className}.{nameof(GetFileInfoByName)}: Unexpected response format: {responseJson}.");

            var fileData = fileInfos.FilesData
                .FirstOrDefault(info => info.FileName.Equals(fileName, StringComparison.InvariantCultureIgnoreCase));

            return fileData;
        }

        private async Task DeleteDocument(string fileId)
        {
            var deleteFileUrl = $"{_documentAPIUrl}/documents/{fileId}";

            using var request = GetApiRequest(HttpMethod.Delete, deleteFileUrl);

            using var response = await _httpClient.SendAsync(request);
            response.EnsureSuccessStatusCode();
        }

        private HttpRequestMessage GetApiRequest(HttpMethod httpMethod, string requestUrl)
        {
            var request = new HttpRequestMessage(httpMethod, requestUrl);
            request.Headers.Authorization = new BasicAuthenticationHeaderValue(_context.Login, _context.Password);

            return request;
        }
    }
}

將情境邏輯加入程式中

將以下內容移動到Program.cs檔案內:

".NET"

using Aspose.Words;
using LiferayExample;

try
{
    await RunCodeExample();
}
catch(Exception ex)
{
    Console.WriteLine($"Failed to execute code example: {ex}");
}

static async Task RunCodeExample()
{
    // Settings.
    const string siteId = "TODO"; // For example: 20119
    const string login = "TODO"; // For example test@liferay.com
    const string password = "TODO"; // Fill actual password for the "test@liferay.com" user.
    const string basePortalUrl = "TODO"; // For example: http://localhost:8080
    const string asposeWordsLicensePath = "TODO"; // For example: Aspose.Words.NET.lic

    const string fileA = "DocumentA.docx";
    const string fileB = "DocumentB.docx";
    const string fileCompared = "DocumentCompared.docx";

    // Set licenses.
    License lic = new License();
    lic.SetLicense(asposeWordsLicensePath);

    // Logic of the scenario.
    Console.WriteLine("Code example started.");

    var client = new DocumentClient(basePortalUrl, new SecurityContext(siteId, login, password));

    var fileAUploadData = await client.Upload(File.OpenRead($"./Docs/{fileA}"), fileA);
    Console.WriteLine($"\"{fileAUploadData.FileName}\" uploaded successfully. Assigned identifier is \"{fileAUploadData.Id}\".");

    var fileBUploadData = await client.Upload(File.OpenRead($"./Docs/{fileB}"), fileB);
    Console.WriteLine($"\"{fileBUploadData.FileName}\" uploaded successfully. Assigned identifier is \"{fileBUploadData.Id}\".");

    var fileAData = await client.Download(fileAUploadData.Id);
    Console.WriteLine($"\"{fileAUploadData.FileName}\" downloaded successfully.");

    var fileBData = await client.Download(fileBUploadData.Id);
    Console.WriteLine($"\"{fileBUploadData.FileName}\" downloaded successfully.");

    var docA = new Document(fileAData);
    var docB = new Document(fileBData);

    docA.Compare(docB, "Aspose", DateTime.Now);

    Console.WriteLine($"Documents compared successfully.");

    using var comparedDocument = new MemoryStream();
    docA.Save(comparedDocument, SaveFormat.Docx);

    comparedDocument.Seek(0, SeekOrigin.Begin);

    var fileComparedUploadData = await client.Upload(comparedDocument, fileCompared);
    Console.WriteLine($"Comparison result \"{fileComparedUploadData.FileName}\" uploaded successfully. Assigned identifier is \"{fileComparedUploadData.Id}\".");

    Console.WriteLine("Code example completed.");
}

執行創建範例並檢查結果

最後,請執行創建的範例並檢查獲得結果:

  1. 編譯這個專案
  2. 執行控制台應用程式。

因此,DocumentCompared.docx這個檔案應該放到文档和媒體圖書館的根目錄下。

此外參閱

-該文章 Work with a Document Stored in a SharePoint Online -該文章Work with a Document Marked by a Sensitivity Label