Angular 2发布节点/ Express Server端点请求 [英] Angular 2 Post Request to Node/Express Server Endpoint
问题描述
我似乎无法诊断为什么我无法在Angular 2 Typescript应用程序中发送成功的HTTP请求。我通过Postman成功发送POST请求,但是前端似乎对链接到后端感到不满......没有错误,后端也没有响应。请帮助!
I can't seem to diagnose why I can't send a successful HTTP request in my Angular 2 Typescript application. I send POST requests successfully through Postman, but the front-end seems to be unhappy about linking to the back-end... there's no error, and the back-end never responds. Please help!
我在C9环境中工作。
这是我当前的实现:
import {Component} from 'angular2/core';
import {MessageBody} from '../message-body/message-body';
import {Http, HTTP_PROVIDERS, Headers} from 'angular2/http';
@Component({
selector: 'signup',
template: require('app/signup/signup.html'),
styles: [require('app/signup/signup.css')],
viewProviders: [HTTP_PROVIDERS],
providers: []
})
export class Signup {
model = new MessageBody(
'',
'',
'',
'');
constructor(public http: Http) {
}
onSubmit() {
var headers = new Headers();
headers.append('Content-Type', 'application/x-www-form-urlencoded');
this.http.post('/email', JSON.stringify(this.model), {headers: headers})
.map(res => console.log(res.json()));
}
}
这是服务器上的端点:
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.post('/email', sendEmail);
app.use(express.static(__dirname +'/../dist'));
app.listen(process.env.PORT, listen);
我试过发布到 / email
, http:// localhost:8080 / email
, https:// {appName} - {username} .c9users.io / email
,一切都无济于事!
I've tried posting to /email
, http://localhost:8080/email
, https://{appName}-{username}.c9users.io/email
, all to no avail!
我做错了什么?我很感激帮助!
What am I doing wrong? I appreciate the help!
编辑:蒂埃里已在这里回答,所以这是一个骗局。
angular2:http post not execution
Thierry already answered here, so this is a dupe. angular2: http post not executing
推荐答案
内容类型与您提供给POST方法的内容不匹配。
There is a mismatch between the content type and the content you provide to the POST method.
如果您需要使用网址编码的表单,则需要以这种方式更新代码:
If you expect url-encoded form, you need to update your code this way:
onSubmit() {
var headers = new Headers();
headers.append('Content-Type', 'application/x-www-form-urlencoded');
var content = new URLSearchParams();
content.set('somefield', this.model.somefield);
(...)
this.http.post('/email', content.toString(), {headers: headers})
.map(res => console.log(res.json()));
}
如果要发送JSON内容,只需更改<$的值c $ c> Content-Type 标题:
If you want to send JSON content, just change the value of the Content-Type
header:
onSubmit() {
var headers = new Headers();
headers.append('Content-Type', 'application/json');
this.http.post('/email', JSON.stringify(this/model), {headers: headers})
.map(res => console.log(res.json()));
}
此外,我认为你的端点不在同一台机器上,除非你通过您的Express应用程序提供以下内容:
Moreover I think that you endpoint isn't located on the same machine unless you serve it through your Express application with something like this:
app.use(express.static('public'));
这篇关于Angular 2发布节点/ Express Server端点请求的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!