要解决Angular上传进度报告不正确的问题，可以尝试以下方法：

1. 使用HttpClient模块的observe选项：

   import { HttpClient, HttpEventType } from '@angular/common/http';
   
   constructor(private http: HttpClient) { }
   
   uploadFile(file: File) {
     const formData = new FormData();
     formData.append('file', file);
   
     this.http.post('upload-url', formData, {
       reportProgress: true,
       observe: 'events'
     }).subscribe(event => {
       if (event.type === HttpEventType.UploadProgress) {
         const progress = Math.round(100 * event.loaded / event.total);
         console.log(`Upload progress: ${progress}%`);
       } else if (event.type === HttpEventType.Response) {
         console.log('Upload complete');
       }
     });
   }
   

2. 使用XMLHttpRequest对象：

   uploadFile(file: File) {
     const formData = new FormData();
     formData.append('file', file);
   
     const xhr = new XMLHttpRequest();
     xhr.open('POST', 'upload-url', true);
   
     xhr.upload.addEventListener('progress', event => {
       if (event.lengthComputable) {
         const progress = Math.round(100 * event.loaded / event.total);
         console.log(`Upload progress: ${progress}%`);
       }
     });
   
     xhr.onreadystatechange = () => {
       if (xhr.readyState === XMLHttpRequest.DONE) {
         console.log('Upload complete');
       }
     };
   
     xhr.send(formData);
   }
   

3. 使用第三方库ngx-uploadx：

   import { UploadxOptions, UploadState, UploadxService } from 'ngx-uploadx';
   
   constructor(private uploadService: UploadxService) { }
   
   uploadFile(file: File) {
     const options: UploadxOptions = {
       url: 'upload-url',
       concurrency: 1,
       autoUpload: true,
       allowedTypes: '.png, .jpg',
       headers: {
         Authorization: 'Bearer ' + localStorage.getItem('token')
       },
       onProgress: (state: UploadState) => {
         const progress = Math.round(100 * state.loaded / state.total);
         console.log(`Upload progress: ${progress}%`);
       },
       onCompleteItem: (item, response, status, headers) => {
         console.log('Upload complete');
       }
     };
   
     this.uploadService.handleFiles([file], options);
   }
   

以上方法中，第一种方法使用了Angular的HttpClient模块来发送HTTP请求，并使用observe选项和HttpEventType来获取上传进度和完成状态。第二种方法使用了原生的XMLHttpRequest对象来发送请求，并监听progress事件和readystatechange事件来获得上传进度和完成状态。第三种方法使用了第三方库ngx-uploadx，它提供了更多的功能和配置选项来处理文件上传，并通过回调函数提供了上传进度和完成状态的通知。根据需求选择适合的方法来解决问题。