OpenRouteService Road Navigation Extension

LetsCode · August 15, 2020, 5:56am

Attached Test AIA File To clear any designing doubts…

im_pala · August 15, 2020, 1:17pm

It is a very good extension.

Can you give the meanings of error numbers?

LetsCode · August 15, 2020, 1:57pm

Every Error Which Comes Is The Response Code Of the raw response which comes back from OpenRouteService except 200. (Which means everything is ok).

If you get 4003 or 4002 then you must have requested directions from the wrong coordinates.

LetsCode · August 16, 2020, 11:26am

Sorry @im_pala In my last message I told that
If you get 4003 then you must have requested directions from the same coordinates in very less time like if you call the request directions every 1 second (with clock component) it will give you that error.

And that’s wrong … Correct Is any API response code starting from 400 means that something is wrong with the request.

You can check other response codes here:

LetsCode · August 16, 2020, 12:10pm

I have checked and confirmed that Navigation Extension Works With Google Maps Without Any Errors…

Use With Polyline Tool To Show Path On the Map. Like This:

Very Important note: Your App will crash if you don’t include the Maps component as it is a dependency for the extension to work.

Peter · August 16, 2020, 12:12pm

This is really great to hear. Nice job @LetsCode.

Peter · August 16, 2020, 12:40pm

Is it possible to make a version that don’t need OpenStreetmap?

LetsCode · August 16, 2020, 5:32pm

We are trying to implement that.

im_pala · August 16, 2020, 9:52pm

thanks again

Krishna_Varshney1 · August 19, 2020, 12:17pm

after adding api key and compiling the apk from provided aia, it shows error 4003

Peter · August 19, 2020, 12:17pm

Can you provide your blocks. 4003 means an error with the routing service.

Peter · August 19, 2020, 12:30pm

Is it still not working? I saw last week that the website of openrouteservice was down and also of the university that is hosting it. Maybe that was the problem now also. The website of openrouteservice is working at the moment.

LetsCode · August 19, 2020, 1:00pm

No, it means wrong values as written in documentation.

All error codes are here:

github.com

GIScience/openrouteservice/blob/master/openrouteservice/docs/services/error_codes.md

# HTTP Status Codes

The following table describes the supported HTTP status codes.

| HTTP Status Code   |  Description |
|----------|--------------|
| 200 |  Standard response for successfully processed requests.  |
| 400 |  The request is incorrect and therefore can not be processed. |
| 404 |  The end point is not available, or a given request completed successfully but found no results.  |
| 405 |  The specified HTTP method is not supported. For more details, refer to the EndPoint documentation.   |
| 413 |  The request is larger than the server is able to process, the data provided in the request exceeds the capacity limit. |
| 500 |  An unexpected error was encountered and more detailed internal error code is provided (see **Internal Error Codes**). |
| 501 |  Indicates that the server does not support the functionality needed to fulfill the request. |
| 503 |  The server is currently unavailable due to overload or maintenance. |


# Internal Error Codes

The following sections describes the list of possible internal error codes that might be provided by different ORS EndPoints.

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Peter · August 19, 2020, 1:02pm

This is what can be found in the App Inventor code thought i found it

github.com

mit-cml/appinventor-sources/blob/03209c86c739b46063fb1d96714f00c65bfacb9e/appinventor/components/src/com/google/appinventor/components/runtime/util/ErrorMessages.java

// -*- mode: java; c-basic-offset: 2; -*-
// Copyright 2009-2011 Google, All Rights reserved
// Copyright 2011-2019 MIT, All rights reserved
// Released under the Apache License, Version 2.0
// http://www.apache.org/licenses/LICENSE-2.0

package com.google.appinventor.components.runtime.util;

import java.util.HashMap;
import java.util.Map;

/**
 * Provides constants and methods related to error numbers and messages.
 *
 * @author [email protected] (Liz Looney)
 */
public final class ErrorMessages {
  public static final int ERROR_DEFAULT = 0;
  // Phone version errors
  public static final int ERROR_FUNCTIONALITY_NOT_SUPPORTED_CONTACT_EMAIL = 1;

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LetsCode · August 19, 2020, 2:09pm

Ohh…

These are app inventor specific errors .

I disturbed the open route service staff for that and they too got confused with the error codes.

Don’t Tell Them!!

LetsCode · August 19, 2020, 2:19pm

I think I need to ask the app inventor staff to tell which error refers to what because I can only understand ERROR_INVALID_API_KEY = 4001; and ERROR_NO_ROUTE_FOUND = 4004; but others such as ERROR_UNABLE_TO_REQUEST_DIRECTIONS,
ERROR_ROUTING_SERVICE_ERROR = 4003; are not understood by its name.

I mean ERROR_UNABLE_TO_REQUEST_DIRECTIONS is not telling its actual meaning by its name. Why it is unable to request direction it is not describing it. Is there an error in the code or the values or the server. It is too unclear about that.

Mohamed_Tamer · August 19, 2020, 2:33pm

Actually you can know the errors from the java code.This error isn’t used in the actual source code.As i understood from the code.App inventor is going to add the ability to request directions from any directions api using a server url . I found that This error is used there and isn’t used in any place else.That means it won’t appear in your code as it doesn’t belong to openRouteService.So simply ignore it.

That happens if the response code isn’t equal 200 which means that a server error occured.( ! means not )
EDIT = that error also is in the private implementation of requesting directions from a custom api.So it also not belong to OpenRouteService

You can see the private implementation here:

LetsCode · August 19, 2020, 2:45pm

Means it doesn’t use OpenRouteService?
And where did you find this?

Mohamed_Tamer · August 19, 2020, 2:47pm

That’s what i see.But maybe OpenRouteService have another 4003 error

LetsCode · August 19, 2020, 2:50pm

I saw that in the first lines of code they have defined serviceURL as the api.openrouteservice.org/directions/V2/api/