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db-rest/docs/getting-started.md

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rewrite docs, part 1 :memo:
2020-05-01 18:51:03 +02:00
# Getting Started with `v5.db.transport.rest`
Let's walk through the **requests that are necessary to implement a typical basic transit app**.
*Note:* To properly & securely handle user input containing URL-unsafe characters, always [URL-encode](https://en.wikipedia.org/wiki/Percent-encoding) your query parameters!
The following code snippets use [`curl`](https://curl.haxx.se) (a versatile command line HTTP tool) and [`jq`](https://stedolan.github.io/jq/) (the command line swiss army knife for processing JSON).
### 1. search for stops
The `/locations?query=…` route allows you to query stops, points of interest (POIs) & addresses. We're only interested in stops though, so we filter using `poi=false&addresses=false`:
```shell
curl 'https://v5.db.transport.rest/locations?poi=false&addresses=false&query=südkreuz' -s | jq
```
```js
[
{
"type": "stop",
"id": "8011113",
"name": "Berlin Südkreuz",
"location": {
"type": "location",
"id": "8011113",
"latitude": 52.47623,
"longitude": 13.365863
},
"products": {
"nationalExpress": true,
"national": true,
// …
}
},
{
"type": "stop",
"id": "731654",
"name": "Südkreuz Bahnhof (S), Berlin",
"location": {
"type": "location",
"id": "731654",
"latitude": 52.476265,
"longitude": 13.3642
},
"products": {
"nationalExpress": true,
"national": true,
"regionalExp": true,
"regional": true,
"suburban": true,
"bus": true,
"ferry": false,
"subway": false,
"tram": false,
"taxi": false
}
},
{
"type": "stop",
"id": "727256",
"name": "Südkreuz Bahnhof (S)/Ostseite, Berlin",
"location": {
"type": "location",
"id": "727256",
"latitude": 52.47436,
"longitude": 13.366843
},
"products": {
// …
}
},
// …
]
```
### 2. fetch departures at a stop
Let's fetch 5 of the next departures at *Berlin Südkreuz* (which has the ID `8011113`):
```shell
curl 'https://v5.db.transport.rest/stops/8011113/departures?results=5' -s | jq
```
```js
[
{
"tripId": "1|1168945|24|80|1052020",
"direction": "Schöneberg, Reichartstr.",
"line": {
"type": "line",
"id": "5-vbbbvb-248",
"name": "Bus 248",
"mode": "bus",
"product": "bus",
// …
},
"when": "2020-05-01T18:39:00+02:00",
"plannedWhen": "2020-05-01T18:38:00+02:00",
"delay": 60,
"platform": null,
"plannedPlatform": null,
"stop": {
"type": "stop",
"id": "727256",
"name": "Südkreuz Bahnhof (S)/Ostseite, Berlin",
"location": { /* … */ },
"products": { /* … */ },
"station": {
"type": "station",
"id": "8011113",
"name": "Berlin Südkreuz",
"location": { /* … */ },
"products": { /* … */ },
}
},
"remarks": [],
},
// …
{
"tripId": "1|322308|0|80|1052020",
"direction": "Lutherstadt Wittenberg Hbf",
"line": {
"type": "line",
"id": "re-3",
"name": "RE 3",
"mode": "train",
"product": "regional",
// …
},
"when": "2020-05-01T18:40:00+02:00",
"plannedWhen": "2020-05-01T18:41:00+02:00",
"delay": -60,
"platform": "6",
"plannedPlatform": "6",
"stop": {
"type": "stop",
"id": "8011113",
"name": "Berlin Südkreuz",
"location": { /* … */ },
"products": { /* … */ },
},
"remarks": [ /* … */ ],
},
// …
]
```
Note that `when` includes the `delay`, and `plannedWhen` does not.
### 3. fetch journeys from A to B
We call a connection from A to B – at a specific date & time, made up of sections on specific *trips* – `journey`.
Let's fetch 2 journeys from `8011113` (*Berlin Südkreuz*) to `8010159` (*Halle (Saale)Hbf*), departing tomorrow at 2pm (at the time of writing this).
```shell
curl 'https://v5.db.transport.rest/journeys?from=8011113&to=8010159&departure=tomorrow+2pm&results=2' -s | jq
```
```js
{
"journeys": [{
// 1st journey
"type": "journey",
"legs": [{
// 1st leg
"tripId": "1|310315|0|80|2052020",
"direction": "München Hbf",
"line": {
"type": "line",
"id": "ice-1601",
"name": "ICE 1601",
"mode": "train",
"product": "nationalExpress",
// …
},
"origin": {
"type": "stop",
"id": "8011113",
"name": "Berlin Südkreuz",
"location": { /* … */ },
"products": { /* … */ },
},
"departure": "2020-05-02T14:37:00+02:00",
"plannedDeparture": "2020-05-02T14:37:00+02:00",
"departureDelay": null,
"departurePlatform": "3",
"plannedDeparturePlatform": "3"
"destination": {
"type": "stop",
"id": "8010205",
"name": "Leipzig Hbf",
"location": { /* … */ },
"products": { /* … */ },
},
"arrival": "2020-05-02T15:42:00+02:00",
"plannedArrival": "2020-05-02T15:42:00+02:00",
"arrivalDelay": null,
"arrivalPlatform": "11",
"plannedArrivalPlatform": "11",
// …
}, {
// 2nd leg
"walking": true,
"distance": 116,
"origin": {
"type": "stop",
"id": "8010205",
"name": "Leipzig Hbf",
"location": { /* … */ },
"products": { /* … */ },
},
"departure": "2020-05-02T15:42:00+02:00",
"plannedDeparture": "2020-05-02T15:42:00+02:00",
"departureDelay": null,
"destination": {
"type": "stop",
"id": "8098205",
"name": "Leipzig Hbf (tief)",
"location": { /* … */ },
"products": { /* … */ },,
"station": {
"type": "station",
"id": "8010205",
"name": "Leipzig Hbf",
"location": { /* … */ },
"products": { /* … */ },
}
},
"arrival": "2020-05-02T15:51:00+02:00",
"plannedArrival": "2020-05-02T15:51:00+02:00",
"arrivalDelay": null,
// …
}, {
// 3rd leg
"tripId": "1|334376|4|80|2052020",
"direction": "Halle(Saale)Hbf",
"line": {
"type": "line",
"id": "4-800486-5",
"name": "S 5",
"mode": "train",
"product": "suburban",
// …
},
"origin": {
"type": "stop",
"id": "8098205",
"name": "Leipzig Hbf (tief)",
"location": { /* … */ },
"products": { /* … */ },,
"station": {
"type": "station",
"id": "8010205",
"name": "Leipzig Hbf",
"location": { /* … */ },
"products": { /* … */ },
}
},
"departure": "2020-05-02T15:53:00+02:00",
"plannedDeparture": "2020-05-02T15:53:00+02:00",
"departureDelay": null,
"departurePlatform": "2",
"plannedDeparturePlatform": "2",
"destination": {
"type": "stop",
"id": "8010159",
"name": "Halle(Saale)Hbf",
"location": { /* … */ },
"products": { /* … */ },
},
"arrival": "2020-05-02T16:19:00+02:00",
"plannedArrival": "2020-05-02T16:19:00+02:00",
"arrivalDelay": null,
"arrivalPlatform": "13",
"plannedArrivalPlatform": "13",
"cycle": {"min": 600, "max": 1800, "nr": 7},
"alternatives": [
{
"tripId": "1|333647|0|80|2052020",
"direction": "Halle(Saale)Hbf",
"line": { /* … */ },
"when": "2020-05-02T16:03:00+02:00",
"plannedWhen": "2020-05-02T16:03:00+02:00",
"delay": null,
},
// …
],
// …
}],
}, {
// 2nd journey
"type": "journey",
"legs": [ /* … */ ],
// …
}],
// …
}
```
Note that `departure` includes the `departureDelay`, and `arrival` includes the `arrivalDelay`. `plannedDeparture` and `plannedArrival` do not.
### 4. more features
enable OpenAPI spec, link to it 📝
2021-02-04 19:24:13 +01:00
These are the basics. Check the full [API docs](api.md) for all features or use the [OpenAPI playground](https://petstore.swagger.io/?url=https%3A%2F%2Fv5.db.transport.rest%2F.well-known%2Fservice-desc%0A) or explore the API!
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