内容：接口配置文件、http请求封装 、拦截器验证登录
1、接口配置文件
app.api.ts
import { Component, OnInit } from '@angular/core';
/**
* 接口配置文件
* baseurl
* urlList
*/
export class apiList implements OnInit {
baseurl: any = '';
urlList: any = {};
constructor() {
this.baseurl = 'http://127.0.0.1';
this.urlList = {
'login': {
path: '/login',
params: {
username: '',
password: ''
}
},
'getUser': {
path: '/getUser',
params: {
id: ''
}
}
}
}
ngOnInit() {}
}
上面模拟定义了两个接口
2、http请求封装
app.service.ts
import { Component, Injectable } from '@angular/core';
import { HttpClient, HttpParams } from '@angular/common/http';
import {apiList} from './app.api'; // 引入api配置文件
@Component({
providers:[apiList]
})
@Injectable()
export class selfHttp {
public restServer;
public http;
status = {
'0': '请求超时，请检查网络是否断开或者链接是否正确',
"400": "错误的请求。由于语法错误，该请求无法完成。",
"401": "未经授权。服务器拒绝响应。",
"403": "已禁止。服务器拒绝响应。",
"404": "未找到。无法找到请求的位置。",
"405": "方法不被允许。使用该位置不支持的请求方法进行了请求。",
"406": "不可接受。服务器只生成客户端不接受的响应。",
"407": "需要代理身份验证。客户端必须先使用代理对自身进行身份验证。",
"408": "请求超时。等待请求的服务器超时。",
"409": "冲突。由于请求中的冲突，无法完成该请求。",
"410": "过期。请求页不再可用。",
"411": "长度必需。未定义“内容长度”。",
"412": "前提条件不满足。请求中给定的前提条件由服务器评估为 false。",
"413": "请求实体太大。服务器不会接受请求，因为请求实体太大。",
"414": "请求 URI 太长。服务器不会接受该请求，因为 URL 太长。",
"415": "不支持的媒体类型。服务器不会接受该请求，因为媒体类型不受支持。",
"416": "HTTP 状态代码 {0}",
"500": "内部服务器错误。",
"501": "未实现。服务器不识别该请求方法，或者服务器没有能力完成请求。",
"503": "服务不可用。服务器当前不可用(过载或故障)。"
};
constructor(Http: HttpClient, public api: apiList) {
console.log(this.api.baseurl);
this.http = Http;
this.restServer = this.api.baseurl;
}
public get(url, params?: Object, cb?: Function) {
this.msg(url);
let httpParams = new HttpParams();
const vm = this;
if (params) {
for (const key in params) {
if (params[key] === false || params[key]) {
httpParams = httpParams.set(key, params[key]);
}
}
}
vm.http.get(vm.restServer + url, { params: httpParams })
.subscribe(data => {
cb(data);
},(err)=>{
console.log(this.status[err.status]);
});
}
public post(url, data?: Object, cb?: Function, options?: Object) {
this.msg(url);
const vm = this;
vm.http.post(vm.restServer + url, data, options)
.subscribe(res => {
cb(res);
}, (err) => {
console.log(err);
console.log(this.status[err.status]);
}, () => {
//...请求完成
}
);
}
public put(url, data?: Object, cb?: Function, options?: Object) {
this.msg(url);
const vm = this;
vm.http.put(vm.restServer + url, data, options)
.subscribe(res => {
cb(res);
},(err)=>{
console.log(this.status[err.status]);
});
}
public delete(url, params?: Object, cb?: Function) {
this.msg(url);
let httpParams = new HttpParams();
const vm = this;
if (params) {
for (const key in params) {
if (params[key]) {
httpParams = httpParams.set(key, params[key]);
}
}
}
vm.http.delete(vm.restServer + url, { params: httpParams })
.subscribe(data => {
cb(data);
},(err)=>{
console.log(this.status[err.status]);
});
}
public msg(url) {
console.log('/*')
console.log(' **开始请求',url)
console.log(' */')
}
}
上面定义了几个请求的函数，已经提示信息的函数。
app.module.ts注入
import {apiList} from './common/app.api';
.
.
..
providers: [httpInterceptorProviders, apiList],
example.ts
import { Component, OnInit } from '@angular/core';
import { HttpHeaders } from '@angular/common/http';
import { selfHttp } from 'src/app/common/app.service';
import {apiList} from '../common/app.api'; // 引入
@Component({
selector: 'app-article',
templateUrl: './article.component.html',
styleUrls: ['./article.component.css'],
providers:[selfHttp, apiList]
})
export class ArticleComponent implements OnInit {
httpOptions = {
headers: new HttpHeaders({
'Content-Type': 'application/json',
'Authorization': 'my-auth-token'
})
};
data: any;
constructor(public http: selfHttp, public api: apiList) {
console.log(this.api);
}
ngOnInit() {
this.http.post(this.api.urlList.login.path, {username: 1, password:22, other:1113}, res => {
console.log('结果', res);
}, this.httpOptions);
}
}
然后访问的话就会
2、拦截器
app.myintercept.ts
/** * 拦截器验证token */ import { Injectable } from '@angular/core'; import {HttpInterceptor, HttpHandler, HttpRequest, HttpEvent,} from '@angular/common/http'; import { Router } from '@angular/router'; import { Observable, } from 'rxjs'; import {apiList} from './app.api' @Injectable() export class InterceptorService implements HttpInterceptor { constructor( public router: Router, public api: apiList) { // localStorage.setItem('access_token', 'xxxxxxxxxxxxx') }; intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> { let authReq: any; // 实现第一次不拦截的方式：1. 指定接口不拦截 2. 判断本地localStorage let loginUrl = this.api.baseurl + this.api.urlList['login']['path']; if (req.url !== loginUrl) { if (localStorage.getItem('access_token')) { // console.log(2); const token = localStorage.getItem('access_token'); authReq = req.clone({ setHeaders: { token } }); return next.handle(authReq); } else { // 未登录 == access_token this.router.navigate(['/login']); } } authReq = req.clone({ setHeaders: {} }); return next.handle(authReq); } }
上面请求会验证是否有token，没有就跳转到登录页面。
定义拦截器收集文件
http-intercepts/index.ts
/** * 拦截器 收集 * barrel */ import { HTTP_INTERCEPTORS } from '@angular/common/http'; import { InterceptorService } from '../app.myIntercept'; export const httpInterceptorProviders = [ { provide: HTTP_INTERCEPTORS, useClass: InterceptorService, multi: true }, ];
app.module.ts注入
import {httpInterceptorProviders} from 'src/app/common/http-interceptors/index'
.
.
.
.
providers: [httpInterceptorProviders, apiList],
现在如果进入页面请求，没有带token的话就会自动跳转到登录页面。
今ならできます。
