C# 从WebAPI核心下载文件-Angular 7
我试图从服务器下载一个文件,但该文件没有显示其原始内容,而是显示[object] WEB API核心C# 从WebAPI核心下载文件-Angular 7,c#,asp.net-web-api,asp.net-core,asp.net-core-webapi,angular7,C#,Asp.net Web Api,Asp.net Core,Asp.net Core Webapi,Angular7,我试图从服务器下载一个文件,但该文件没有显示其原始内容,而是显示[object] WEB API核心 [Authorize(AuthenticationSchemes = "Bearer")] [HttpGet] public HttpResponseMessage DownloadContractFile(string fileName) { string contentRootPath = _hostingEnvironment.ContentRootPath; var fo
[Authorize(AuthenticationSchemes = "Bearer")]
[HttpGet]
public HttpResponseMessage DownloadContractFile(string fileName)
{
string contentRootPath = _hostingEnvironment.ContentRootPath;
var folderName = Path.Combine(contentRootPath, FileHandler.ContractFilePath, Convert.ToInt32(User.Identity.Name).ToString());
var path = Path.Combine(folderName, fileName);
var memory = new MemoryStream();
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
using (var stream = new FileStream(path, FileMode.Open))
{
result.Content = new StreamContent(stream);
result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
result.Content.Headers.ContentDisposition.FileName = Path.GetFileName(path);
result.Content.Headers.ContentType = new MediaTypeHeaderValue(FileHandler.GetContentType(path)); // Text file
result.Content.Headers.ContentLength = stream.Length;
return result;
}
}
角度代码:服务方法
downloadContractFile(fileName: string) {
const obj: any = { fileName: fileName };
const httpParams: HttpParamsOptions = { fromObject: obj } as HttpParamsOptions;
const httpOptions = {
params: new HttpParams(httpParams),
headers: new HttpHeaders({
'Content-Type': 'application/octet-stream',
'Authorization': 'Bearer ' + this.jwt.getToken
})
};
return this.http.get<Array<any>>(`${this.settings.getApiSettings('uri')}/api/contract/DownloadContractFile`, httpOptions).map( /// <<<=== use `map` here
(response) => {
if (response["status"] == 401) {
this.jwt.redirectToLogin();
}
else if (response["status"] < 200 || response["status"] >= 300) {
throw new Error('This request has failed ' + response["status"]);
}
let data = response;
return data;
}
);
}
Component.html
<a href="javascript:void(0)" (click)="downloadFile(item.fileName);">download file</a>
收到的答复
收到的文件内容
这是我在项目中下载文件时使用的代码 控制器代码:
[HttpGet("DownloadFile")]
public async Task<IActionResult> DownloadFile(string fileName = "")
{
var response = await DownloadFileFromDatabase(fileName);
if (response.IsSuccessStatusCode)
{
System.Net.Http.HttpContent content = response.Content;
var contentStream = await content.ReadAsStreamAsync();
var audioArray = ReadFully(contentStream);
return Ok(new { response = audioArray, contentType = "audio/wav", fileName });
}
else
{
throw new FileNotFoundException();
}
}
如果仔细查看,可能会发现该方法受到保护:
[Authorize(AuthenticationSchemes=“Bearer”)]
。如何使用授权传输标题?
[HttpGet("DownloadFile")]
public async Task<IActionResult> DownloadFile(string fileName = "")
{
var response = await DownloadFileFromDatabase(fileName);
if (response.IsSuccessStatusCode)
{
System.Net.Http.HttpContent content = response.Content;
var contentStream = await content.ReadAsStreamAsync();
var audioArray = ReadFully(contentStream);
return Ok(new { response = audioArray, contentType = "audio/wav", fileName });
}
else
{
throw new FileNotFoundException();
}
}
HandleBase64 (data , contentType,fileName ){
let byteCharacters = atob(data);
let byteNumbers = new Array(byteCharacters.length);
for (var i = 0; i < byteCharacters.length; i++)
byteNumbers[i] = byteCharacters.charCodeAt(i);
let byteArray = new Uint8Array(byteNumbers);
let blob = new Blob([byteArray], {type: contentType});
if(contentType === "audio/wav"){
var blobURL=URL.createObjectURL(blob);
window.open(blobURL);
}
else{
var blobURL = window.URL.createObjectURL(blob);
var anchor = document.createElement("a");
anchor.download = fileName;
anchor.href = blobURL;
anchor.click();
}
}
return File(stream, "application/octet-stream");