使用JavaScript从自定义的ASPX/HTML网页上传.TXT文件到SharePoint

<input type="file" id="fileInput" />
<button onclick="uploadFile()">上传文件</button>

function uploadFile() {
  var fileInput = document.getElementById("fileInput");
  var file = fileInput.files[0];
  
  var reader = new FileReader();
  reader.onloadend = function(e) {
    var arrayBuffer = e.target.result;
    
    // 使用SharePoint的REST API上传文件
    var url = "<SharePoint网站URL>/_api/web/lists/getByTitle('<文档库名称>')/RootFolder/Files/add(url='<文件名>', overwrite=true)";
    var xhr = new XMLHttpRequest();
    xhr.open("POST", url, true);
    xhr.setRequestHeader("Content-Type", "application/octet-stream");
    xhr.setRequestHeader("Authorization", "Bearer <访问令牌>");
    xhr.onload = function() {
      if (xhr.status === 200) {
        console.log("文件上传成功！");
      } else {
        console.error("文件上传失败：" + xhr.responseText);
      }
    };
    xhr.send(arrayBuffer);
  };
  reader.readAsArrayBuffer(file);
}