[英]Angular 4 doesn't include headers to http request
我正在嘗試非常簡單的角度4 http請求。 當我檢查chrome開發人員工具時,我看不到http標頭。
const headers: Headers = new Headers();
headers.append('Content-Type', 'application/json');
headers.append('Authorization', 'Bearer: 123213');
this.http.post('https://127.0.0.1:502', JSON.stringify(token), {headers: headers}).subscribe();
我錯過了什么嗎?
從angular@5.x.
開始angular@5.x.
@angular/http
模塊及其所有類都已棄用。 現在應該使用angular/common/http
。 在這里閱讀更多。
import { HttpHeaders } from '@angular/common/http';
const httpOptions = {
headers: new HttpHeaders({
'Content-Type': 'application/json',
'Authorization': 'my-auth-token'
})
};
this.http.post(
"http://localhost:3000/contacts",
JSON.stringify({id: 4, name: 'some'}),
httpOptions
).subscribe();
對於舊版本,您可以這樣做:
import {Http, Headers, RequestOptions} from '@angular/http';
export class AppComponent {
constructor(private http: Http) {
const headers = new Headers();
headers.append('Content-Type', 'application/json');
headers.append('authentication', `hello`);
const options = new RequestOptions({headers: headers});
this.http.post(
"http://localhost:3000/contacts",
JSON.stringify({id: 4, name: 'some'}),
options
).subscribe();
你必須確保從@angular/http
導入正確的對象:
import {Http, Headers, RequestOptions} from '@angular/http';
如果您仍然沒有看到標題,那么您使用的服務器也可能不允許它們。 當瀏覽器向另一個源發出請求時,它會發送access-control-headers-request標頭以檢查服務器是否允許自定義標頭。 如果您的服務器未配置為允許自定義標頭,則不會在后續請求中看到它們。
如果您使用HttpClient而不是Http,您的代碼應如下所示:
login(credintials: Authenticate): Observable<any> {
const body = {
username: credintials.username,
password: credintials.password,
grant_type: 'password',
client_id: credintials.client_id
};
const headers = new HttpHeaders()
.set('Content-Type', 'application/x-www-form-urlencoded')
.set('Authorization', 'Basic loremlorem');
return this.http.post(`${baseUrl}/uaa/oauth/token`,
body,
{
headers: headers
}
);
}
如果您的參數是可選的,您應該添加這樣的參數:
let params: HttpParams = new HttpParams();
if (param) {
params = params.append( 'page', param.page );
}
源代碼如下:
/**
* Construct a new body with an appended value for the given parameter name.
*/
append(param: string, value: string): HttpParams;
把它
constructor(private http: Http) {
this.headers = new Headers();
this.headers.append('content-type', 'application/json');
}
在這個方法里面
return this.http.post(url, jsonData, this.headers).map((resp: Response) => resp.json());
import { HttpClient,HttpHeaders } from '@angular/common/http';
const httpOptions = {headers:new HttpHeaders({'Content-Type':'application / x-www-form-urlencoded'})};
“對於httppost”
this.httpClient.post('http://localhost/rajat/ajax/contact_query_submit/',{name:name,email:email,phone:phone,message:message},httpOptions)
.subscribe(data => {
console.log(data);
});
“對於收到的帖子數據,你必須在下面提到這一點”
$postdata = file_get_contents("php://input");
$_POST = json_decode($postdata,TRUE);
$addArr = array(
'name' => $this->input->post('name'),
'email' => $this->input->post('email'),
'phone' => $this->input->post('phone'),
'message' => $this->input->post('message'),
'created' => time()
);
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