MATLAB Answers

HERE RESTful API - POST - Fleet Telematics

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Sridhar Eswaran
Sridhar Eswaran on 24 Jun 2020
Commented: Sridhar Eswaran on 29 Jun 2020
Hi, How can I send this request in matlab?
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curl --location --request POST 'https://fleet.cit.api.here.com/2/calculateroute.json?routeMatch=1&mode=car&app_id=ABCDEFGHIJK&app_code=ABCDEFGHIJK&attributes=ROAD_GEOM_FCn(*),%0ASPEED_LIMITS_FCn(*)' \
--header 'Content-Type: text/plain' \
--data-raw '<?xml version="1.0" encoding="UTF-8" standalone="no"?><gpx version="1.0" creator="ITN Converter 1.94M (http://www.benichou-software.com)" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.topografix.com/GPX/1/0" xmlns:topografix="http://www.topografix.com/GPX/Private/TopoGrafix/0/2" xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd http://www.topografix.com/GPX/Private/TopoGrafix/0/2 http://www.topografix.com/GPX/Private/TopoGrafix/0/2/topografix.xsd"><time>2020-06-22T11:22:23Z</time><bounds minlat="49.274710" minlon="9.223330" maxlat="49.288730" maxlon="9.242580"/><rte><name>Route_from_Peter</name><rtept lat="49.274710" lon="9.223330"/><rtept lat="49.274740" lon="9.223380"/><rtept lat="49.274840" lon="9.223540"/><rtept lat="49.275030" lon="9.223830"/><rtept lat="49.275160" lon="9.224100"/><rtept lat="49.275260" lon="9.224290"/>...........................<rtept lat="49.288230" lon="9.241680"/><rtept lat="49.288280" lon="9.241760"/><rtept lat="49.288340" lon="9.241850"/><rtept lat="49.288390" lon="9.241920"/><rtept lat="49.288440" lon="9.241990"/><rtept lat="49.288560" lon="9.242200"/><rtept lat="49.288730" lon="9.242580"/></rte></gpx>'
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I have used this code,
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url = 'https://fleet.cit.api.here.com/2/calculateroute.json?routeMatch=1&mode=car&app_id=ABCDEFGHIJK&app_code=ABCDEFGHIJK &attributes=ROAD_GEOM_FCn(*),SPEED_LIMITS_FCn(*)';
weboptions('ContentType','text','RequestMethod','POST')
payload = fileread('AudiRoute_Section01.gpx');
response = webwrite(url,payload);
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The response was,
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Error using matlab.internal.webservices.HTTPConnector/copyContentToByteArray (line 396)
The server returned the status 400 with message "" in response to the request to URL
https://fleet.cit.api.here.com/2/calculateroute.json?routeMatch=1&mode=car&app_id=ABCDEFGHIJK&app_code=ABCDEFGHIJK&attributes=ROAD_GEOM_FCn%28%2A%29,SPEED_LIMITS_FCn%28%2A%29,ADAS_ATTRIB_FCn%28%2A%29,LINK_ATTRIBUTE_FCn%28%2A%29.
Error in readContentFromWebService (line 46)
byteArray = copyContentToByteArray(connection);
Error in webwrite (line 139)
[varargout{1:nargout}] = readContentFromWebService(connection, options);
Error in rest (line 4)
response = webwrite(url,payload);
///
Can anyone help here?
Thanks in Advance.

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Answers (1)

Geoff Hayes
Geoff Hayes on 24 Jun 2020
Sridhar - the 400 error code indicates (if I recall correctly) that there is a problem with your request. I see that you call
weboptions('ContentType','text','RequestMethod','POST')
but that you don't do anything with the result of that call. I think that your code could be more like
url = 'https://fleet.cit.api.here.com/2/calculateroute.json?routeMatch=1&mode=car&app_id=ABCDEFGHIJK&app_code=ABCDEFGHIJK &attributes=ROAD_GEOM_FCn(*),SPEED_LIMITS_FCn(*)';
options = weboptions('ContentType','text','RequestMethod','POST');
payload = fileread('AudiRoute_Section01.gpx');
response = webwrite(url,payload,options); % <--- include the options as a parameter of webwrite
I can't test the above so I don't know if it will work (especially with the payload) but it might get you a little further.

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Sridhar Eswaran
Sridhar Eswaran on 26 Jun 2020
Hi Geoff,
I tried the method you suggested. Still getting error same error. May be I am doing something wrong here. Lemme try again and get back to you. Please suggest if you have any other methods.
Really appreciate your help. Thanks.
Geoff Hayes
Geoff Hayes on 26 Jun 2020
Hi Sridhar - I tried with the above code using system and it worked so long a valid app code and id were used.
Sridhar Eswaran
Sridhar Eswaran on 29 Jun 2020
Hi Geoff, I will reacquire a new app id, app code and try your suggestion. Will let you know the outcome. Thanks

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