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Http failure response for localhost api request: 0 Unknown Error - Angular
How to use java.net.URLConnection to fire and handle HTTP requestsHow to make CORS-enabled HTTP requests in Angular 2?angular2 http post request get a errorrest API call (from angular) in webpack server returns 401Spring Boot, Angular 2, CORS “Request header field authorization is not allowed by Access-Control-Allow-Headers in preflight response.”How to add CORS request in header in Angular 5Http failure response for (unknown url): 0 Unknown Error - Only on Angular 5cors enable in Request header field Access-Control-Allow-Origin is not allowed by Access-Control-Allow-Headers in preflight responseWith Angular 7 use HTTP API for POST and command error headers missingRequest header field Authorization is not allowed by Access-Control-Allow-Headers in preflight response(Jenkins API)
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I'm trying to create a communication to my Java Jetty Backend from my Angular application. When I try to execute my request I receive the following error:
My code on client side: (Angular 7.2.1). I'm also using a HttpInterceptor for authentication that should work. I'm also running the code in development mode with ng serve.
@Injectable(
providedIn: 'root'
)
export class NgHydrantService
constructor(private http: HttpClient)
public register(entity: IEntityDescription): Observable<StandardResponsePacket>
let packet = new RegisterEntityRequestPacket(entity);
return this.http.post(this._apiUrl, packet.toJson())
.pipe(
map(value =>
console.log('register result:', value); //<-- never executed
return <StandardResponsePacket>HydrantPackage.fromJson(value)
)
);
//The interceptor
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>
// add authorization header with basic auth credentials if available
if (this.user != null)
const clonedRequest = request.clone(
headers: request.headers.set('Authorization', `Basic $this.user.getAuth()`)
.set('Accept','application/json')
);
//This debug line works and looks good!
console.log('NgHydrantAuthInterceptor#intercept', clonedRequest);
return next.handle(clonedRequest);
return next.handle(request);
My Code on server side: (Jetty-9.4.14.v20181114) that runs on localhost.
public final class PacketHandler extends AbstractHandler
@Override
public void handle( String target,
Request baseRequest,
HttpServletRequest request,
HttpServletResponse response ) throws IOException
try
// Declare response encoding and types
response.setContentType( "application/json; charset=utf-8" );
// Enable CORS
response.addHeader("Access-Control-Allow-Origin", "*");
response.addHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, HEAD");
response.addHeader("Access-Control-Allow-Headers", "X-PINGOTHER, Origin, X-Requested-With, Content-Type, Accept");
response.addHeader("Access-Control-Max-Age", "1728000");
//... more stuff
finally
// Inform jetty that this request was handled
baseRequest.setHandled( true );
Things I checked:
- During research some people reference problems with CORS (that's why I added the header entries in the server side code)
- The same request in Postman works without any problems
- There are no logs on the server side
My question is about a possible solution to get responses from my server during development.
java
angular 
jetty edited Mar 22 at 10:29
Yosh Wong
212
asked Mar 21 at 23:15
DraykeDrayke
152111
add a comment |
I'm trying to create a communication to my Java Jetty Backend from my Angular application. When I try to execute my request I receive the following error:
My code on client side: (Angular 7.2.1). I'm also using a HttpInterceptor for authentication that should work. I'm also running the code in development mode with ng serve.
@Injectable(
providedIn: 'root'
)
export class NgHydrantService
constructor(private http: HttpClient)
public register(entity: IEntityDescription): Observable<StandardResponsePacket>
let packet = new RegisterEntityRequestPacket(entity);
return this.http.post(this._apiUrl, packet.toJson())
.pipe(
map(value =>
console.log('register result:', value); //<-- never executed
return <StandardResponsePacket>HydrantPackage.fromJson(value)
)
);
//The interceptor
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>
// add authorization header with basic auth credentials if available
if (this.user != null)
const clonedRequest = request.clone(
headers: request.headers.set('Authorization', `Basic $this.user.getAuth()`)
.set('Accept','application/json')
);
//This debug line works and looks good!
console.log('NgHydrantAuthInterceptor#intercept', clonedRequest);
return next.handle(clonedRequest);
return next.handle(request);
My Code on server side: (Jetty-9.4.14.v20181114) that runs on localhost.
public final class PacketHandler extends AbstractHandler
@Override
public void handle( String target,
Request baseRequest,
HttpServletRequest request,
HttpServletResponse response ) throws IOException
try
// Declare response encoding and types
response.setContentType( "application/json; charset=utf-8" );
// Enable CORS
response.addHeader("Access-Control-Allow-Origin", "*");
response.addHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, HEAD");
response.addHeader("Access-Control-Allow-Headers", "X-PINGOTHER, Origin, X-Requested-With, Content-Type, Accept");
response.addHeader("Access-Control-Max-Age", "1728000");
//... more stuff
finally
// Inform jetty that this request was handled
baseRequest.setHandled( true );
Things I checked:
- During research some people reference problems with CORS (that's why I added the header entries in the server side code)
- The same request in Postman works without any problems
- There are no logs on the server side
My question is about a possible solution to get responses from my server during development.
java
angular jetty edited Mar 22 at 10:29
Yosh Wong
212
asked Mar 21 at 23:15
DraykeDrayke
152111
add a comment |
I'm trying to create a communication to my Java Jetty Backend from my Angular application. When I try to execute my request I receive the following error:
My code on client side: (Angular 7.2.1). I'm also using a HttpInterceptor for authentication that should work. I'm also running the code in development mode with ng serve.
@Injectable(
providedIn: 'root'
)
export class NgHydrantService
constructor(private http: HttpClient)
public register(entity: IEntityDescription): Observable<StandardResponsePacket>
let packet = new RegisterEntityRequestPacket(entity);
return this.http.post(this._apiUrl, packet.toJson())
.pipe(
map(value =>
console.log('register result:', value); //<-- never executed
return <StandardResponsePacket>HydrantPackage.fromJson(value)
)
);
//The interceptor
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>
// add authorization header with basic auth credentials if available
if (this.user != null)
const clonedRequest = request.clone(
headers: request.headers.set('Authorization', `Basic $this.user.getAuth()`)
.set('Accept','application/json')
);
//This debug line works and looks good!
console.log('NgHydrantAuthInterceptor#intercept', clonedRequest);
return next.handle(clonedRequest);
return next.handle(request);
My Code on server side: (Jetty-9.4.14.v20181114) that runs on localhost.
public final class PacketHandler extends AbstractHandler
@Override
public void handle( String target,
Request baseRequest,
HttpServletRequest request,
HttpServletResponse response ) throws IOException
try
// Declare response encoding and types
response.setContentType( "application/json; charset=utf-8" );
// Enable CORS
response.addHeader("Access-Control-Allow-Origin", "*");
response.addHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, HEAD");
response.addHeader("Access-Control-Allow-Headers", "X-PINGOTHER, Origin, X-Requested-With, Content-Type, Accept");
response.addHeader("Access-Control-Max-Age", "1728000");
//... more stuff
finally
// Inform jetty that this request was handled
baseRequest.setHandled( true );
Things I checked:
- During research some people reference problems with CORS (that's why I added the header entries in the server side code)
- The same request in Postman works without any problems
- There are no logs on the server side
My question is about a possible solution to get responses from my server during development.
java
angular jetty edited Mar 22 at 10:29
Yosh Wong
212
asked Mar 21 at 23:15
DraykeDrayke
152111
I'm trying to create a communication to my Java Jetty Backend from my Angular application. When I try to execute my request I receive the following error:
My code on client side: (Angular 7.2.1). I'm also using a HttpInterceptor for authentication that should work. I'm also running the code in development mode with ng serve.
@Injectable(
providedIn: 'root'
)
export class NgHydrantService
constructor(private http: HttpClient)
public register(entity: IEntityDescription): Observable<StandardResponsePacket>
let packet = new RegisterEntityRequestPacket(entity);
return this.http.post(this._apiUrl, packet.toJson())
.pipe(
map(value =>
console.log('register result:', value); //<-- never executed
return <StandardResponsePacket>HydrantPackage.fromJson(value)
)
);
//The interceptor
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>
// add authorization header with basic auth credentials if available
if (this.user != null)
const clonedRequest = request.clone(
headers: request.headers.set('Authorization', `Basic $this.user.getAuth()`)
.set('Accept','application/json')
);
//This debug line works and looks good!
console.log('NgHydrantAuthInterceptor#intercept', clonedRequest);
return next.handle(clonedRequest);
return next.handle(request);
My Code on server side: (Jetty-9.4.14.v20181114) that runs on localhost.
public final class PacketHandler extends AbstractHandler
@Override
public void handle( String target,
Request baseRequest,
HttpServletRequest request,
HttpServletResponse response ) throws IOException
try
// Declare response encoding and types
response.setContentType( "application/json; charset=utf-8" );
// Enable CORS
response.addHeader("Access-Control-Allow-Origin", "*");
response.addHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, HEAD");
response.addHeader("Access-Control-Allow-Headers", "X-PINGOTHER, Origin, X-Requested-With, Content-Type, Accept");
response.addHeader("Access-Control-Max-Age", "1728000");
//... more stuff
finally
// Inform jetty that this request was handled
baseRequest.setHandled( true );
Things I checked:
- During research some people reference problems with CORS (that's why I added the header entries in the server side code)
- The same request in Postman works without any problems
- There are no logs on the server side
My question is about a possible solution to get responses from my server during development.
@Injectable(
providedIn: 'root'
)
export class NgHydrantService
constructor(private http: HttpClient)
public register(entity: IEntityDescription): Observable<StandardResponsePacket>
let packet = new RegisterEntityRequestPacket(entity);
return this.http.post(this._apiUrl, packet.toJson())
.pipe(
map(value =>
console.log('register result:', value); //<-- never executed
return <StandardResponsePacket>HydrantPackage.fromJson(value)
)
);
//The interceptor
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>
// add authorization header with basic auth credentials if available
if (this.user != null)
const clonedRequest = request.clone(
headers: request.headers.set('Authorization', `Basic $this.user.getAuth()`)
.set('Accept','application/json')
);
//This debug line works and looks good!
console.log('NgHydrantAuthInterceptor#intercept', clonedRequest);
return next.handle(clonedRequest);
return next.handle(request);
@Injectable(
providedIn: 'root'
)
export class NgHydrantService
constructor(private http: HttpClient)
public register(entity: IEntityDescription): Observable<StandardResponsePacket>
let packet = new RegisterEntityRequestPacket(entity);
return this.http.post(this._apiUrl, packet.toJson())
.pipe(
map(value =>
console.log('register result:', value); //<-- never executed
return <StandardResponsePacket>HydrantPackage.fromJson(value)
)
);
//The interceptor
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>
// add authorization header with basic auth credentials if available
if (this.user != null)
const clonedRequest = request.clone(
headers: request.headers.set('Authorization', `Basic $this.user.getAuth()`)
.set('Accept','application/json')
);
//This debug line works and looks good!
console.log('NgHydrantAuthInterceptor#intercept', clonedRequest);
return next.handle(clonedRequest);
return next.handle(request);
java
angular jetty java
angular jetty edited Mar 22 at 10:29
Yosh Wong
212
asked Mar 21 at 23:15
DraykeDrayke
152111
edited Mar 22 at 10:29
Yosh Wong
212
asked Mar 21 at 23:15
DraykeDrayke
152111
edited Mar 22 at 10:29
Yosh Wong
212
edited Mar 22 at 10:29
Yosh Wong
212
edited Mar 22 at 10:29
Yosh Wong
212
212
asked Mar 21 at 23:15
DraykeDrayke
152111
asked Mar 21 at 23:15
DraykeDrayke
152111
asked Mar 21 at 23:15
DraykeDrayke
152111
152111
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Can you please follow the steps in below link
https://www.html5rocks.com/en/tutorials/cors/
For quick solution add below plugin in your chrome
https://chrome.google.com/webstore/detail/allow-control-allow-origi/nlfbmbojpeacfghkpbjhddihlkkiljbi?hl=en
answered Mar 21 at 23:35
manoj mallickmanoj mallick
123
add a comment |
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1 Answer
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active
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votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Can you please follow the steps in below link
https://www.html5rocks.com/en/tutorials/cors/
For quick solution add below plugin in your chrome
https://chrome.google.com/webstore/detail/allow-control-allow-origi/nlfbmbojpeacfghkpbjhddihlkkiljbi?hl=en
answered Mar 21 at 23:35
manoj mallickmanoj mallick
123
add a comment |
Can you please follow the steps in below link
https://www.html5rocks.com/en/tutorials/cors/
For quick solution add below plugin in your chrome
https://chrome.google.com/webstore/detail/allow-control-allow-origi/nlfbmbojpeacfghkpbjhddihlkkiljbi?hl=en
answered Mar 21 at 23:35
manoj mallickmanoj mallick
123
add a comment |
Can you please follow the steps in below link
https://www.html5rocks.com/en/tutorials/cors/
For quick solution add below plugin in your chrome
https://chrome.google.com/webstore/detail/allow-control-allow-origi/nlfbmbojpeacfghkpbjhddihlkkiljbi?hl=en
answered Mar 21 at 23:35
manoj mallickmanoj mallick
123
Can you please follow the steps in below link
https://www.html5rocks.com/en/tutorials/cors/
For quick solution add below plugin in your chrome
https://chrome.google.com/webstore/detail/allow-control-allow-origi/nlfbmbojpeacfghkpbjhddihlkkiljbi?hl=en
answered Mar 21 at 23:35
manoj mallickmanoj mallick
123
answered Mar 21 at 23:35
manoj mallickmanoj mallick
123
answered Mar 21 at 23:35
manoj mallickmanoj mallick
123
answered Mar 21 at 23:35
manoj mallickmanoj mallick
123
123
add a comment |
add a comment |
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