<!DOCTYPE html>
<html>
<head>
<base href="." />
<title>Image upload in angular2 to HTTP request</title>
<link rel="stylesheet" href="style.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js/dist/zone.js"></script>
<script src="https://unpkg.com/zone.js/dist/long-stack-trace-zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
<script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script>
<script src="config.js"></script>
<script>
System.import('app')
.catch(console.error.bind(console));
</script>
</head>
<body>
<my-app>
loading...
</my-app>
</body>
</html>
/* Styles go here */
### Angular Starter Plunker - Typescript
System.config({
//use typescript for compilation
transpiler: 'typescript',
//typescript compiler options
typescriptOptions: {
emitDecoratorMetadata: true
},
paths: {
'npm:': 'https://unpkg.com/'
},
//map tells the System loader where to look for things
map: {
'app': './',
'@angular/core': 'npm:@angular/core/bundles/core.umd.js',
'@angular/common': 'npm:@angular/common/bundles/common.umd.js',
'@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
'@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
'@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
'@angular/http': 'npm:@angular/http/bundles/http.umd.js',
'@angular/router': 'npm:@angular/router/bundles/router.umd.js',
'@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
'@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
'@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
'@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
'@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
'@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
'@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
'@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
'rxjs': 'npm:rxjs',
'typescript': 'npm:typescript@2.0.2/lib/typescript.js'
},
//packages defines our app package
packages: {
app: {
main: './main.ts',
defaultExtension: 'ts'
},
rxjs: {
defaultExtension: 'js'
}
}
});
//main entry point
import {platformBrowserDynamic} from '@angular/platform-browser-dynamic'
import {AppModule} from './app.module'
platformBrowserDynamic().bootstrapModule(AppModule)
import {Component} from '@angular/core';
import { Observable } from 'rxjs/Observable';
import { Http, Headers, Request, Response, RequestOptions } from '@angular/http';
import 'rxjs/add/operator/catch';
import 'rxjs/add/operator/map';
@Component({
selector: 'my-app',
templateUrl: 'app.component.html',
})
export class AppComponent {
private apiBaseUrl = 'http://api-test.com'; //this is a fake url. Put in your own API url.
headers: Headers = new Headers();
constructor(private _http: Http) {}
/**
* Handles the change event of the input tag,
* Extracts the image file uploaded and
* makes an Http request with the image file.
*/
handleInputChange (event) {
var image = event.target.files[0];
var pattern = /image-*/;
var reader = new FileReader();
if (!image.type.match(pattern)) {
console.error('File is not an image');
//of course you can show an alert message here
return;
}
let endPoint = '/upload/profileImage'; //use your own API endpoint
let headers = new Headers();
headers.set('Content-Type', 'application/octet-stream');
headers.set('Upload-Content-Type', image.type)
this.makeRequest(endPoint, 'POST', image, headers).subscribe(
response => {this.handleSuccess(response); },
error => {this.handleError(error); }
);
}
/**
* Makes the HTTP request and returns an Observable
*/
private makeRequest (endPoint: string,
method: string, body = null,
headers: Headers = new Headers()): Observable<any>
{
let url = this.apiBaseUrl + endPoint;
this.headers = headers;
if (method == 'GET') {
let options = new RequestOptions({ headers: this.headers });
return this._http.get(url, options)
.map(this.extractData)
.catch(this.extractError);
} else if (method == 'POST') {
let options = new RequestOptions({ headers: this.headers });
return this._http.post(url, body, options)
.map(this.extractData)
.catch(this.extractError);
}
}
/**
* Extracts the response from the API response.
*/
private extractData (res: Response) {
let body = res.json();
return body.response || { };
}
private extractError (res: Response) {
let errMsg = 'Error received from the API';
return errMsg;
}
private handleSuccess(response) {
console.log('Successfully uploaded image');
//provide your own implementation of handling the response from API
}
private handleError(errror) {
console.error('Error uploading image')
//provide your own implementation of displaying the error message
}
}
<div>
<h2>Upload Image</h2>
<input type="file" accept="image/*" (change)="handleInputChange($event)"/>
</div>
import {Component, NgModule} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
import {AppComponent} from './app.component'
import { HttpModule } from '@angular/http';
@NgModule({
imports: [ BrowserModule, HttpModule ],
declarations: [ AppComponent ],
bootstrap: [ AppComponent ]
})
export class AppModule {}
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs/Observable';
import { Http, Headers, Request, Response, RequestOptions } from '@angular/http';
import 'rxjs/add/operator/catch';
import 'rxjs/add/operator/map';
@Injectable()
export class HttpService {
private apiBaseUrl = 'http://api-test.com';
headers: Headers = new Headers();
constructor (private _http: Http) {}
makeRequest (endPoint: string, method: string, body = null, headers: Headers = new Headers()) {
let url = this.apiBaseUrl + endPoint;
this.headers = headers;
if (method == 'GET') {
let options = new RequestOptions({ headers: this.headers });
return this._http.get(url, options)
.map(this.extractData)
.catch(this.handleError);
} else if (method == 'POST') {
let options = new RequestOptions({ headers: this.headers });
return this._http.post(url, body, options)
.map(this.extractData)
.catch(this.handleError);
}
}
}