我是棱角分明的新人。我正在创建注册功能，但是当我发布请求它给了我错误：“发布有效请求”。你能检查一下我的代码并告诉我我做错了什么。
服务
import { Injectable, OnInit } from '@angular/core';
import {HttpModule, Http,Response,Headers, RequestOptions,Request,RequestMethod} from '@angular/http';
import 'rxjs/add/operator/map';
import { Observable } from "rxjs/Rx";
import { User } from './user';
import { HttpClient,HttpHeaders, HttpRequest } from '@angular/common/http';
@Injectable({
providedIn: 'root'
})
export class RegisterService implements OnInit {
posts_Url: string = 'http://localhost:8080/GradeMyDrawings/teacher/register';
constructor(private http: HttpClient) {
}
ngOnInit () {
}
registerUser(user:User) {
return this.http.post(this.posts_Url, JSON.stringify(user))
.map((response: Response) => response);
}
}
注册组件
import {Component, OnInit,Input} from '@angular/core'
import { CommonService } from '../../_common/services/common.service';
import { CommonComponent } from '../../_common/common.component';
import { User } from '../../shared/user';
import { RegisterService } from '../../shared/register.service';
import { Router, RouterModule } from '@angular/router';
import {HttpModule, Http,Response,Headers, RequestOptions} from '@angular/http';
import {HttpClient, HttpErrorResponse} from '@angular/common/http';
@Component ({
selector: 'app-login',
templateUrl: './signup.component.html',
styleUrls: ['./signup.component.css'],
providers:[RegisterService]
})
export class SignUpComponent implements OnInit {
public model:any = [];
constructor (private _resterservie:RegisterService, private router:Router) { }
ngOnInit () {
}
register()
{
this._resterservie.registerUser(this.model)
.subscribe(
data => {
console.log("Successful");
},
error=> {
console.log("Error");
}
)
}
}
注册html
<div class="form-group">
<input type="text" name="tTitle" [(ngModel)]="model.tTitle" #tTitle = "ngModel" placeholder="Teacher Title" class="form-control" id="tTitle" />
</div>
<div class="form-group">
<label id="tq1"><strong>Q1:</strong>What is your Birth Date</label>
<input type="text" name="tans1" [(ngModel)]="model.tans1" #tans1 = "ngModel" placeholder="Security Q1" class="form-control" id="tans1" />
</div>
<div class="form-group">
<label id="tq2"><strong>Q2:</strong> What is your favourite Sports:</label>
<input type="text" name="tans2" [(ngModel)]="model.tans2" #tans2 = "ngModel" placeholder="Security Q2" class="form-control" id="tans2" />
</div>
<div class="form-group">
<label id="tq3"><strong>Q3:</strong> What is your favourite Color:</label>
<input type="text" name="tans3" [(ngModel)]="model.tans3" #tans3 = "ngModel" placeholder="Security Q3" class="form-control" id="tans3" />
</div>
<div class="form-group">
<select class="form-control" id="tSignUpType" name="tsignUpType" [(ngModel)]="model.tsignUpType" #tsignUpType = "ngModel">
<option>ADMIN</option>
<option>TEACHER</option>
</select>
</div>
<div class="form-group">
<input type="text" name="Email" [(ngModel)]="model.Email" #Email = "ngModel" placeholder="Email" class="form-control" id="tSignUpEmail" />
</div>
<div class="form-group" style="position:relative">
<div id="pas-mismatch" style="color: red; position: absolute; top: -18px;"></div>
<input type="password" name="password" [(ngModel)]="model.password" #password = "ngModel" placeholder="Password" class="form-control" id="tSignUpPassword" />
</div>
<div class="form-group">
<input type="password" name="password2" [(ngModel)]="model.password2" #password2 = "ngModel" placeholder="Retype password" class="form-control" id="tconfirmpassword" />
</div>
<div class="form-group">
<input type="submit" name="signup_submit" class="btn btn-primary" value="Sign up" id="SignUpbtn" />
<button class="btn btn-primary signIn">Sign In</button>
</div>
<div class="alert alert-success successful_alert" style="display:none;">
Successfully Created your Account, You can login Now!
</div>
</form>
用户界面
export interface User {
'tsignUpUserid':string;
'tsignUpDisplayName':string;
'tschoolid':string;
'tschoolName':string;
'tschoolAd1':string;
'tschoolAd2':string;
'tschoolZip':string;
'tschoolCity':string;
'tschoolState':string;
'tTitle':string;
'tq1':string;
'tq2':string;
'tq3':string;
'tans1':string;
'tans2':string;
'tans3':string;
'tsignUpType':string;
'tsignUpPassword':string;
'tSignUpEmail':string;
}
您是否尝试将json发送到服务器并添加了标头内容类型？我认为错误来自服务器服务器不接受请求，但如果没有，请与我们分享捕获或有关请求或控制台错误的信息。
看起来你错过了.pipe。更新您的代码如下。
registerUser(user: User): Observable<any> {
return this.http.post(this.posts_Url, user)
.pipe(
map((response: Response) => response)
);
}
另请注意： 1.请检查您是否确实需要对用户对象进行字符串化。如果api以这种方式接受，你可以直接传递json对象。 2.您不需要在服务类中实现“OnInit”。
在服务器配置中添加Access-Control-Allow-Origin或在处理程序文件中添加以下标头。
这个例子是为php。
<?php
header("Access-Control-Allow-Origin: *");
header('Content-Type: application/json');
?>
这是常见问题之一，否则您将从浏览器控制台获取错误。
请在您的邮寄请求中添加headers
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });
return this.http.post(this.posts_Url, JSON.stringify(user),options).map(
(response: Response) => <any>response.json()
);
你的registerUser(user: User)方法接受User类型的参数，但是你在singup组件中为http请求提供了一个数组。因此，您需要在注册组件中更正此问题
public model: User;
您也可以先初始化
public model: User = {};