modelbinder IsMultiPartContent始终返回false.如何使用React上传文件 [英] modelbinder IsMultiPartContent always returning false. How to upload file with react
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问题描述
我有以下反应成分
import React, { Component } from 'react';
import { Row, Col } from 'antd';
import PageHeader from '../../components/utility/pageHeader';
import Box from '../../components/utility/box';
import LayoutWrapper from '../../components/utility/layoutWrapper.js';
import ContentHolder from '../../components/utility/contentHolder';
import basicStyle from '../../settings/basicStyle';
import IntlMessages from '../../components/utility/intlMessages';
import { adalApiFetch } from '../../adalConfig';
export default class extends Component {
constructor(props) {
super(props);
this.state = {TenantId: '', TenantUrl: '', TenantPassword: '' };
this.handleChangeTenantUrl = this.handleChangeTenantUrl.bind(this);
this.handleChangeTenantPassword = this.handleChangeTenantPassword.bind(this);
this.handleChangeTenantId= this.handleChangeTenantId.bind(this);
this.handleSubmit = this.handleSubmit.bind(this);
};
handleChangeTenantUrl(event){
this.setState({TenantUrl: event.target.value});
}
handleChangeTenantPassword(event){
this.setState({TenantPassword: event.target.value});
}
handleChangeTenantId(event){
this.setState({TenantId: event.target.value});
}
handleSubmit(event){
event.preventDefault();
const formData = new FormData()
let files = event.target.files;
for (let i = 0; i < files.length; i++) {
formData.append('content', files[i], files[i].name);
}
const options = {
method: 'put',
data: {"TenantId": this.state.TenantId, "TenantUrl": this.state.TenantUrl, "TenantPassword": this.state.TenantPassword },
config: {
headers: {
'Content-Type': 'multipart/form-data'
}
}
};
adalApiFetch(fetch, "/Tenant", options)
.then(response => response.json())
.then(responseJson => {
if (!this.isCancelled) {
this.setState({ data: responseJson });
}
})
.catch(error => {
console.error(error);
});
}
upload(e){
let data = new FormData();
//Append files to form data
let files = e.target.files;
for (let i = 0; i < files.length; i++) {
data.append('content', files[i], files[i].name);
}
}
render(){
const { data } = this.state;
const { rowStyle, colStyle, gutter } = basicStyle;
return (
<div>
<LayoutWrapper>
<PageHeader>{<IntlMessages id="pageTitles.TenantAdministration" />}</PageHeader>
<Row style={rowStyle} gutter={gutter} justify="start">
<Col md={12} sm={12} xs={24} style={colStyle}>
<Box
title={<IntlMessages id="pageTitles.TenantAdministration" />}
subtitle={<IntlMessages id="pageTitles.TenantAdministration" />}
>
<ContentHolder>
<form onSubmit={this.handleSubmit}>
<label>
TenantId:
<input type="text" value={this.state.TenantId} onChange={this.handleChangeTenantId} />
</label>
<label>
TenantUrl:
<input type="text" value={this.state.TenantUrl} onChange={this.handleChangeTenantUrl} />
</label>
<label>
TenantPassword:
<input type="text" value={this.state.TenantPassword} onChange={this.handleChangeTenantPassword} />
</label>
<label>
Certificate:
<input onChange = { e => this.upload(e) } type = "file" id = "files" ref = { file => this.fileUpload } />
</label>
<input type="submit" value="Submit" />
</form>
</ContentHolder>
</Box>
</Col>
</Row>
</LayoutWrapper>
</div>
);
}
}
并且我有以下webapi控制器
and I have the following webapi controller
public class TenantModelBinder : IModelBinder
{
public bool BindModel(HttpActionContext actionContext, ModelBindingContext bindingContext)
{
if (bindingContext.ModelType != typeof(Tenant))
{
return false;
}
var task = Task.Run(async () =>
{
var model = new Tenant();
if (!actionContext.Request.Content.IsMimeMultipartContent())
{
bindingContext.ModelState.AddModelError(bindingContext.ModelName, "WebRequeest content 'multipart/form-data' is valid");
}
else
{
var provider = await actionContext.Request.Content.ReadAsMultipartAsync();
var fileContent = provider.Contents.FirstOrDefault(n => n.Headers.ContentDisposition.Name.Equals("file"));
if (fileContent == null)
{
bindingContext.ModelState.AddModelError(bindingContext.ModelName, "Section 'file' is missed");
}
var modelContent = provider.Contents.FirstOrDefault(n => n.Headers.ContentDisposition.Name.Equals("model"));
if (modelContent == null)
{
bindingContext.ModelState.AddModelError(bindingContext.ModelName, "Section 'model' is missed");
}
if (fileContent != null && modelContent != null)
{
model = JsonConvert.DeserializeObject<Tenant>(await modelContent.ReadAsStringAsync());
//model.Text = "<NativeTranslation>";
model.ContentType = provider.Contents[0].Headers.ContentType.MediaType;
model.CertificateFile = await fileContent.ReadAsByteArrayAsync();
//model.TenantId = fileContent.Headers.ContentDisposition.FileName;
}
}
return model;
});
task.Wait();
bindingContext.Model = task.Result;
return true;
}
}
public class Tenant
{
public string TenantId { get; set; }
public string TenantUrl { get; set; }
public Uri CertificatePath { get; set; }
public string CertificatePassword { get; set; }
public byte[] CertificateFile { get; set; }
public string ContentType { get; set; }
public override string ToString()
{
return JsonConvert.SerializeObject(this);
}
}
[HttpPut]
public async Task<IHttpActionResult> PutTenant([ModelBinder(typeof(TenantModelBinder))] Tenant tenant)
{
//var provider = new MultipartMemoryStreamProvider();
//var contentType = "";
//var content = new byte[0];
//await base.Request.Content.ReadAsMultipartAsync(provider);
//if (provider.Contents.Count > 0)
//{
// contentType = provider.Contents[0].Headers.ContentType.MediaType;
// content = await provider.Contents[0].ReadAsByteArrayAsync();
//}
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(ConfigurationManager.AppSettings["AzureStorageKey"].ToString());
// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference(ConfigurationManager.AppSettings["certificatesContainer"].ToString());
// Retrieve reference to a blob named "myblob".
CloudBlockBlob blockBlob = container.GetBlockBlobReference("myblob");
// Create or overwrite the "myblob" blob with contents from a local file.
blockBlob.Properties.ContentType = tenant.ContentType;
MemoryStream stream = new MemoryStream(tenant.CertificateFile);
blockBlob.UploadFromStream(stream);
var tenantStore = CosmosStoreFactory.CreateForEntity<Tenant>();
tenant.CertificatePath = blockBlob.Uri;
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
var added = await tenantStore.AddAsync(tenant);
return StatusCode(HttpStatusCode.NoContent);
}
该行:
actionContext.Request.Content.IsMimeMultipartContent()
actionContext.Request.Content.IsMimeMultipartContent()
总是假的，就是问题所在.
is always false, thats the problem.
推荐答案
我不知道React，但似乎您的请求不是multipart/form-data请求.
I do not know React, but it seems your request is no multipart/form-data request.
您正确使用了ContentType，但是据我了解，您的数据是JSON ...
You use ContentType correctly, but your data is JSON as I understand...
您需要发送FormData对象.
类似这样的东西:
const formData = new FormData()
formData.append("model", {"TenantId": this.state.TenantId, "TenantUrl": this.state.TenantUrl, "TenantPassword": this.state.TenantPassword });
let files = event.target.files;
for (let i = 0; i < files.length; i++) {
formData.append('content', files[i], files[i].name);
}
const options = {
method: 'put',
data: formData,
config: {
headers: {
'Content-Type': 'multipart/form-data'
}
}
};
In any case all necessary information you can find in documentation link here.
请查看在jQuery上发送multipart/form-data的示例.
Please review this example of sending multipart/form-data on jQuery.
示例在React上.
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