SAP HANA XS使用UI5上传文件

Question

我试图在HANA XS服务器上的UI5应用程序中实现文件上载。 我无法找到许多信息如何做到这一点 - 有人有一个想法？

Answer 1

这里的简单实现一个纯文本文件上传：

客户端JS：

doUpload: function() { 
    var uploadField = document.getElementById("ulUploader1-fu"); 
    var file = uploadField.files[0]; 

    var reader = new FileReader(); 
    reader.onload = function (event) { 
    var source = event.target.result; // this is the binary values 
    var name = file.name;  

    $.ajax({ 
     url: "/services/upload.xsjs?cmd=Import", 
     type: "PUT", 
     processData: false, 
     contentType: file.type, 
     data: source, 
     xhr: function() { 
      var req = $.ajaxSettings.xhr(); 
      if (req) { 
       if (req.overrideMimeType) { 
        req.overrideMimeType('text/plain; charset=x-user-defined'); 
       } 
       if (req.sendAsBinary) { 
        req.send = req.sendAsBinary; 
       } 
      } 
      return req; 
     }, 
     error: function(xhr, textStatus, errorThrown){ 
      alert(xhr.responseText); 
     }, 
     success: function() { 
      reader.onload = null; 
     } 
     }); 
    }; 
    reader.readAsText(file); 
} 

而这里的服务器端xsjs服务：

function doImport() { 
    var data = '', conn = $.db.getConnection(), pstmt; 

    if($.request.body){ 
     data = $.request.body.asString();  
    } 

    var conn = $.db.getConnection(); 
    var pstmt = conn.prepareStatement('INSERT INTO "TEST"."UPLOAD" (ID, MIMETYPE, DATA) VALUES(?,?,?)'); 

    pstmt.setInteger(1,1); 
    pstmt.setString(2,"text/plain"); 
    pstmt.setString(3,data); 

    pstmt.execute(); 
    pstmt.close(); 

    conn.commit(); 
    conn.close(); 

    doResponse(200,''); 

    $.response.contentType = 'text/plain'; 
    $.response.setBody('Upload ok'); 
    $.response.status = 200; 
} 

Answer 2

XS没有“准备使用”服务，允许您这样做。您当然可以在HANA DB中创建一个表格，创建一个列类型的BLOB，然后在XS上构建服务，从而允许您从前端上传文件。我希望有所帮助。