响应为空时如何获得响应Headers?
How to get Response Headers when response is empty?
使用 Angular2 和 dotcms,我试图在调用订阅后获得响应 headers。
const httpOptions = {
headers: new HttpHeaders({ 'Content-Type': 'application/json' })
.append('Access-Control-Expose-Headers', 'X-Custom-header')
};
let json = {..};
let apiURL = 'api/content/publish.1'
this.http.put(apiURL, JSON.stringify(json), httpOptions).subscribe((res:Response) => console.log(res.headers.keys()));
好的,回复 body 是空的,但在 Chrome 上看到我可以看到所有回复 headers
HTTP/1.1 200 OK
X-Powered-By: Express
access-control-allow-origin: *
server: Apache-Coyote/1.1
location: http://localhost:3000/api/content/inode/bb23a6ac-f6f0-4ed3-8971-095dbc38ef52
inode: bb23a6ac-f6f0-4ed3-8971-095dbc38ef52
identifier: c05e9b20-46a4-4efc-9ded-b5d1a2613cad
access-control-allow-methods: GET, HEAD, POST, PUT, DELETE, OPTIONS
access-control-allow-headers: Authorization, Accept, Content-Type,
Cookies
content-length: 0
date: Thu, 15 Feb 2018 12:34:27 GMT
connection: close
我得到了200,执行没问题,我无法得到响应headers
ERROR TypeError: Cannot read property 'headers' of null
如果您想要完整的回复,您可以在选项 object 中设置 observe
属性 以及 headers.
this.http.put(apiURL, JSON.stringify(json),
{observe:'response'}).subscribe((res:Response) =>
console.log(res));
在这种情况下,您将获得完整的响应以及 headers。
使用 Angular2 和 dotcms,我试图在调用订阅后获得响应 headers。
const httpOptions = {
headers: new HttpHeaders({ 'Content-Type': 'application/json' })
.append('Access-Control-Expose-Headers', 'X-Custom-header')
};
let json = {..};
let apiURL = 'api/content/publish.1'
this.http.put(apiURL, JSON.stringify(json), httpOptions).subscribe((res:Response) => console.log(res.headers.keys()));
好的,回复 body 是空的,但在 Chrome 上看到我可以看到所有回复 headers
HTTP/1.1 200 OK
X-Powered-By: Express
access-control-allow-origin: *
server: Apache-Coyote/1.1
location: http://localhost:3000/api/content/inode/bb23a6ac-f6f0-4ed3-8971-095dbc38ef52
inode: bb23a6ac-f6f0-4ed3-8971-095dbc38ef52
identifier: c05e9b20-46a4-4efc-9ded-b5d1a2613cad
access-control-allow-methods: GET, HEAD, POST, PUT, DELETE, OPTIONS
access-control-allow-headers: Authorization, Accept, Content-Type,
Cookies
content-length: 0
date: Thu, 15 Feb 2018 12:34:27 GMT
connection: close
我得到了200,执行没问题,我无法得到响应headers
ERROR TypeError: Cannot read property 'headers' of null
如果您想要完整的回复,您可以在选项 object 中设置 observe
属性 以及 headers.
this.http.put(apiURL, JSON.stringify(json),
{observe:'response'}).subscribe((res:Response) =>
console.log(res));
在这种情况下,您将获得完整的响应以及 headers。