Strava api to export GPX file of activity

I am well able to download my GPX file of an activity when logged in to Strava and calling this link: https://www.strava.com/activities/5656012590/export_original I get the original gpx. It looks as I need it.

Is there a v3 api way? I would like to access it with the swagger generated code, a la

new ActivitiesApi(getApiClientWithToken(token)).getLoggedInAthleteActivities(System.currentTimeSeconds().toInteger(), 0, 1, 30)

(Groovy code, this works for getting activities)

The only thing I found is https://www.strava.com/api/v3/routes/{id}/export_gpx. But from what I see in the Api response of activities, there is no route attached to it. In activities I can see an 'externalId' which is set to something like '123456123.gpx' and I can see the polylines from the map. But converting polylines sounds like too much effort now and I guess it misses some points. Accessing the externalID, I have no idea.

In the end I don't really care how to get the GPX. If it is a cURL call with passing the token via post and then downloading it, would be fine, as well as getting it with the Java API from swagger. I would prefer the latter option though.

Solution

Closest I could get is using the streams API as described in other posts.

        StreamSet streamSet = streamsApi.getActivityStreams(activityId as long, ['latlng', 'altitude', 'time'], true)

        def altitudes = streamSet.getAltitude().getData()
        def latLong = streamSet.getLatlng().getData()
        def times = streamSet.getTime().getData()

        ArrayList<StreamData> data = []
        for (int i = 0; i < times.size(); i++) {
            StreamData streamData = new StreamData()
            streamData.id = activityId as long
            streamData.time = times[i]
            streamData.startTime = startTime
            streamData.altitude = altitudes[i]
            streamData.latitude = latLong[i][0]
            streamData.longitude = latLong[i][1]
            data << streamData
        }

and then building my own GPX file from it:

    def stringWriter = new StringWriter()
    def gpxBuilder = new MarkupBuilder(stringWriter)

    gpxBuilder.mkp.xmlDeclaration(version: "1.0", encoding: "utf-8")
    gpxBuilder.gpx() {
        metadata() {
            time(startTime)
        }
        trk() {
            name(NEW_ACTIVITY_NAME)
            type(convertedType)
            trkseg() {
                for (def item : streamData) {
                    trkpt(lat: item.latitude, lon: item.longitude) {
                        ele(item.altitude)
                        time(UtcTimeString)
                    }
                }
            }
        }
    }

    stringWriter.toString()

Uploading this to Strava works well.