Reactjs 成功上传后如何访问web API返回的响应?
我已经检查了文件,但没有任何地方我可以找到任何细节的要求,我需要 这是一个上传时调用的web API资源,它返回文件名和内容的jsonReactjs 成功上传后如何访问web API返回的响应?,reactjs,asp.net-web-api,filepond,Reactjs,Asp.net Web Api,Filepond,我已经检查了文件,但没有任何地方我可以找到任何细节的要求,我需要 这是一个上传时调用的web API资源,它返回文件名和内容的json [HttpPost, DisableRequestSizeLimit] public ActionResult Upload() { try { var stamp = FileHelper.FormatShortDateForfilename(DateTime.Now, true)
[HttpPost, DisableRequestSizeLimit]
public ActionResult Upload()
{
try
{
var stamp = FileHelper.FormatShortDateForfilename(DateTime.Now, true);
var file = Request.Form.Files[0];
if (file.Length == 0)
throw new Exception("No file uploaded.");
var fileName = ContentDispositionHeaderValue.Parse(file.ContentDisposition).FileName.Trim('"');
fileName = $"[{stamp}] {fileName}";
var fullPath = Path.Combine(webRootPath, fileName);
var ext = Path.GetExtension(fileName);
if (!acceptables.Contains(ext.Replace(".", "")))
throw new Exception($"Only {String.Join("-", acceptables).ToUpper()} files are acceptables.");
using (var stream = new FileStream(fullPath, FileMode.Create))
{
file.CopyTo(stream);
}
dynamic upldData = new JObject();
upldData.filename = fileName;
upldData.Content = "........";
return Json(upldData.ToString());
}
catch (Exception ex)
{
//return Json("Upload Failed: " + ex.Message);
throw;
}
}
下面是我的ReactJS脚本,我需要在其中访问该响应
<FilePond ref={ref => this.pond = ref}
server="api/imports"
labelIdle={'Drag & Drop your CSV file here or <span class="filepond--label-action">Browse</span>'}
checkValidity={true}
acceptedFileTypes={['application/vnd.ms-excel']}
onupdatefiles={fs => {
this.setState({ hasFile: fs.length });
}}
onremovefile={(fs) => {
this.setState({ hasFile: fs && fs.length });
}}
onaddfile={fs => { this.setState({ hasFile: false }) }}
onprocessfile={(err, file) => {
console.log('FilePond ready for use', err, file);
console.log('test', file.serverId);
}}
/>
this.pond=ref}
server=“api/imports”
labelIdle={'将CSV文件拖放到此处或浏览'}
checkValidity={true}
acceptedFileTypes={['application/vnd.ms excel']}
onUpdate文件={fs=>{
this.setState({hasFile:fs.length});
}}
onremovefile={(fs)=>{
this.setState({hasFile:fs&&fs.length});
}}
onaddfile={fs=>{this.setState({hasFile:false}}}
onprocessfile={(错误,文件)=>{
log('FilePond准备好使用',err,file);
console.log('test',file.serverId);
}}
/>
您可以在server.process.onload
回调中访问响应,请确保在所述回调中仍然返回唯一的文件id
自定义流程方法也将起作用,您可以在此处找到更多信息:
我只是花了一些时间来弄清楚这里发生了什么。 这是在filePond中创建请求的主要功能
const createProcessorFunction = (apiUrl = '', action, name) => {
// custom handler (should also handle file, load, error, progress and abort)
if (typeof action === 'function') {
return (...params) => action(name, ...params);
}
// no action supplied
if (!action || !isString(action.url)) {
return null;
}
// internal handler
return (file, metadata, load, error, progress, abort) => {
// set onload hanlder
const ondata = action.ondata || (fd => fd);
const onload = action.onload || (res => res);
const onerror = action.onerror || (res => null);
// no file received
if (!file) return;
// create formdata object
var formData = new FormData();
// add metadata under same name
if (isObject(metadata)) {
formData.append(name, JSON.stringify(metadata));
}
// Turn into an array of objects so no matter what the input, we can handle it the same way
(file instanceof Blob ? [{ name: null, file }] : file).forEach(item => {
formData.append(
name,
item.file,
item.name === null ? item.file.name : `${item.name}${item.file.name}`
);
});
// send request object
const request = sendRequest(ondata(formData), apiUrl + action.url, action);
request.onload = xhr => {
load(
createResponse(
'load',
xhr.status,
onload(xhr.response),
xhr.getAllResponseHeaders()
)
);
};
request.onerror = xhr => {
error(
createResponse(
'error',
xhr.status,
onerror(xhr.response) || xhr.statusText,
xhr.getAllResponseHeaders()
)
);
};
request.ontimeout = createTimeoutResponse(error);
request.onprogress = progress;
request.onabort = abort;
// should return request
return request;
};
};
如您所见,您可以将函数或对象作为server
属性的值传递。
有一些方法,如onload
、onerror
和ondata
,您可以检查这些方法并尝试找到解决问题的方法。或者只需传递自定义函数并在其中执行您的请求,就像
<FilePond server={(...args) => this.handleUploadRequest(...args)} />
this.handleuploaderQuest(…args)}/>
我希望它能帮助你。谢谢我就是这样做的
pondOptions = {
class: 'my-filepond',
multiple: true,
labelIdle: 'Drop files here or click to upload',
acceptedFileTypes: 'image/jpeg, image/png',
server: {
url: environment.base_url + environment.upload_file_url,
process: {
headers: {
Authorization: 'Token ' + window.localStorage.getItem('USER_TOKEN') || null
},
onload: (response) => {this.UPLOAD_FILES.push(response)}, // saving response in global array
}
}
};