我需要获取以下http调用的状态代码并将其作为字符串返回
//This method must return the status of the http response
confirmEmail(mailToken):Observable<String>{
return this.http.get(this.baseUrl+"users/activate?mailToken="+mailToken)
.map(this.extractData)
.catch(this.handleError);
}
谢谢!
添加 Angular >= 4.3(包括 15)版本的答案,并用新的
HttpClient
替换 http
在 Angular 4.3 及更高版本中,引入了 HttpClient 模块,它是旧 Http 模块的改进版本。它允许更轻松地访问 HTTP 响应,包括状态代码和标头。
以下是如何使用它的示例:
在您的模块中,导入 HttpClientModule:
import { HttpClientModule } from '@angular/common/http';
// Notice it is imported from @angular/common/http instead of @angular/http
在您的组件中(如果您只关心如何访问状态,请检查 console.logs):
import { Component } from '@angular/core';
import { HttpClient } from '@angular/common/http';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
private baseUrl = 'http://example.com/api/';
constructor(private http: HttpClient) {
this.activateUser('mailToken123');
}
activateUser(mailToken: string) {
this.http.get(
`${this.baseUrl}users/activate?mailToken=${mailToken}`,
{ observe: 'response' }
)
.subscribe(response => {
// Access the status code
console.log(response.status);
// Access a specific header
console.log(response.headers.get('X-Custom-Header'));
});
}
}
正如 @Rbk 的评论中所指出的,在请求配置对象中传递的observe: 'response' 选项是获取完整响应对象的关键,其中包括状态代码和标头。
请注意,由于浏览器的同源策略和服务器的 Access-Control-Allow-Headers 设置,并非所有标头都可以访问。除非满足两个条件,否则您可能无法检索某些标头。
更多信息,可以参考Angular官方HttpClient文档。
只需按以下方式修改您的代码即可将您的响应状态存储在字段中:
responseStatus: number;
//This method must return the status of the http response
confirmEmail(mailToken):Observable<String> {
//Edited for working with HttpClient on Angular >= 4.3
return this.http.get(this.baseUrl+"users/activate?mailToken="+mailToken, {observe: 'response'})
.map((response: Response) => {
this.responseStatus = response.status;
return this.extractData(response);
}
.catch(this.handleError);
}
然后将其显示在您的组件 HTML 模板中:
<p class='responseStatus'>{{responseStatus}}</p>
这是代码:
http.get(
'${this.baseUrl}users/activate?mailToken=${mailToken}',
{observe: 'response'}
).subscribe(response => {
}, error => {
// You can access status:
console.log(error.status);
});
上面的代码调用实例的
subscribe()
方法,然后在error
通知中获取状态。
很简单!!
在 extractData 函数内部
extractData (res){
//res.status will be your status code
// res.statusText will be your status Text
}
confirmEmail(mailToken):Observable<String> {
return this.http.get(this.baseUrl+"users/activate?mailToken="+mailToken)
.pipe(map(data => {
return data.httpStatus
}));
.catch(this.handleError);
}
希望这能解决您的问题。
如果您使用 HttpClient,这里是一个示例:
this.http.post(myRequest, body, { headers : myHeaders, observe: 'response' }).subscribe(
data => {
console.warn(JSON.stringify(data, null, 2));
},
error => {
console.error(error.errorMessage);
});
`import { HttpClient } from "@angular/common/http";
constructor(
private httpClient: HttpClient){}
this.httpClient.get<any>(this.API_URL, {observe: 'response'})
.subscribe({
next: (res) => {
console.error(res.status) // api status in header
console.error(res.body) // response from api
}
})`
get 方法中的{observe: 'response'} 给出完整的响应对象