[英]Angular 2 and ng2-file-upload
我正在將應用程序編寫為Angular,並且必須上傳文件。 網絡向我顯示狀態:200,但是沒有響應,我的后端沒有收到任何文件。
為什么請求方法是OPTION和CORS(在Chrome中)?
Chrome:Chrome控制台:對預檢請求的響應未通過訪問控制檢查:憑據標志為“ true”,但“ Access-Control-Allow-Credentials”標頭為“”。 允許使用憑據必須為“ true”。 因此,不允許訪問原點。 在此處輸入圖片說明
Firefox:firefox沒有控制台錯誤,請在此處輸入圖片描述
我的鱈魚:
import { Component, OnInit } from '@angular/core';
import { FileUploader } from 'ng2-file-upload';
const URL = 'http://127.0.0.1:8000/api/v1/upload/';
@Component({
selector: 'app-upload',
templateUrl: './upload.component.html',
styleUrls: ['./upload.component.css']
})
export class UploadComponent implements OnInit {
public uploader: FileUploader;
constructor()
{
this.initUpload()
}
ngOnInit() {
}
initUpload() {
this.uploader = new FileUploader({
url: URL,
method: 'POST',
headers: [
{name: 'Access-Control-Allow-Credentials', value: 'true'},
{name:'Access-Control-Allow-Origin', value: '*'}
]
});
}
}
--------------------------------------------
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { FileUploadModule } from 'ng2-file-upload';
import { AppComponent } from './app.component';
import { UploadComponent } from './upload/upload.component';
@NgModule({
imports: [
BrowserModule,
FormsModule,
HttpModule,
FileUploadModule
],
declarations: [
AppComponent,
UploadComponent,
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
--------------------------------------------
<input type="file" ng2FileSelect [uploader]="uploader" multiple /><br/>
<table class="table">
<thead>
<tr>
<th width="50%">Name</th>
<th>Size</th>
<th>Progress</th>
<th>Status</th>
<th>Actions</th>
</tr>
</thead>
<tbody>
<tr *ngFor="let item of uploader.queue">
<td><strong>{{ item.file.name }}</strong></td>
<td nowrap>{{ item.file.size/1024/1024 | number:'.2' }} MB</td>
<td>
<div class="progress" style="margin-bottom: 0;">
<div class="progress-bar" role="progressbar" [ngStyle]="{ 'width': item.progress + '%' }"></div>
</div>
</td>
<td class="text-center">
<span *ngIf="item.isSuccess"><i class="glyphicon glyphicon-ok"></i></span>
<span *ngIf="item.isCancel"><i class="glyphicon glyphicon-ban-circle"></i></span>
<span *ngIf="item.isError"><i class="glyphicon glyphicon-remove"></i></span>
</td>
<td nowrap>
<button type="button" class="btn btn-success btn-xs"
(click)="item.upload()" [disabled]="item.isReady || item.isUploading || item.isSuccess">
<span class="glyphicon glyphicon-upload"></span> Upload
</button>
<button type="button" class="btn btn-warning btn-xs"
(click)="item.cancel()" [disabled]="!item.isUploading">
<span class="glyphicon glyphicon-ban-circle"></span> Cancel
</button>
<button type="button" class="btn btn-danger btn-xs"
(click)="item.remove()">
<span class="glyphicon glyphicon-trash"></span> Remove
</button>
</td>
</tr>
</tbody>
</table>
django使用
CORS_ORIGIN_WHITELIST = (
'localhost:4200'
)
我認為問題是從谷歌瀏覽器調用本地主機
作為簡單的解決方案,您可以將CORS擴展安裝到所有訪問源
您可以從這里安裝
您也可以在API響應中添加這些標頭
'Access-Control-Allow-Origin', 'http://mysite')
'Access-Control-Allow-Headers', 'X-Requested-With, Content-Type, Accept, Origin, Authorization')
'Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
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