Wikiviews api-server

The api-server for the wikiviews application. It provides access to the analyzed and indexed Wikipedia Pageviews data via an RESTful API.

Therefor it uses an ElasticSearch Cluster to store, index and query the data. The ElasticSearch backend can be created with wikiviews-elasticsearch and provisioned with the wikiviews-importer

Usage

The server gets configured via environment variables and can be started locally or inside a docker container.

Configuration

The server gets configured via the following environment variables:

• HTTP: If set, a HTTP server will be provided
  • HTTP_PORT: The port, on which the HTTP server listens (Default: 80)
  • SERVER_ADDR: The address, on which the HTTP server listens (Default: every local address)
• HTTPS: If set, a HTTPS server will be provided
  • HTTPS_PORT: The port, on which the HTTPS server listens (Default: 443)
  • SERVER_ADDR: The address, on which the HTTPS server listens (Default: every local address, identical to the HTTP server address)
  • HTTPS_CERT: Path to the SSL certificate (mandatory, when using HTTPS)
  • HTTPS_KEY: Path to the SSL private key (mandatory, when using HTTPS)
• ES_ADDR: ElasticSearch address (Default: localhost)
• ES_PORT: ElasticSearch port (Default: 9200)
• ES_INDEX: ElasticSearch index for the application data (Default: wikiviews, matches the setup provided by wikiviews-importer)
• ES_TYPE: ElasticSearch type for the article data (Default: article, matches the setup provided by wikiviews-importer)

Backend setup

The setup for the ElasticSearch backend is described in wikiviews-elasticsearch

Run with Docker

Using the official image

The project provides a Docker image in the Docker Hub. You can download this image with

docker pull wikiviews/wikiviews-api-server

This image is automatically generated for each repository tag via Travis-CI ().

Building your own image

If you want to include local changes, use your own tag, etc. you can build your own image from this repository.
To build the Docker image for the Wikiviews Api-Server, run:

docker build -t {TAG-NAME} .

or use the Docker build targets (build:docker and start:docker).

Running a container

To run an instance with , execute:

docker run -e "{CONFIG_NAME}={CONFIG_VALUE}" -e ... --name {CONTAINER-NAME} -p 80:80 wikiviews/wikiviews-api-server

Running locally

You can run the server without docker by installing the projects package and using the command

wv-api-server

Using the npm package

The project provides an NPM package(), which can be installed via

npm install -g @wikiviews/wikiviews-importer

This package is automatically generated for each repository tag via Travis-CI ().

Building from project sources

You can also install the package locally by using the project sources. Therefor clone the project and run

npm install && npm run build && npm install -g

inside the project directory.

API

The API-Server uses a RESTful API to provide the information for the Wikiviews application. The following endpoints are provided:

GET /articles

Provides access to all articles with their corresponding view-count.

Request

The request is parametrized via GET parameters.

Parameter	Type	Description	Default	Example
index	Integral number	The number of the first element returned from the result set.	0	index=10
count	Integral number	The number of elements returned from the result set.	10	count=50
sorting	Array of Strings in the format +/-property	Sorts the articles for the result set ascending (+) or descending (-) (Default: ascending) in respect to the property (article or a date in the format yyyy-mm-dd-hh. If multiple sorting elements are defined in the array, the articles are sorted by multiple properties in the priority defined by the position in the array (first element is the primary sorting element).	+article	sorting[0]=-article, sorting[0]=+2016-07-08-05&sorting[1]=-2016-07-05-06
filter	String	Fulltext search filter applied to the articles for the result set.	None	filter=Cheese
range	Array of Objects having two String properties (from and to)	Defines alphabetical ranges which can be excluded or included in the result set (see the mode parameter).	Range containing no articles	range[0][from]=a&range[0][to]=z range[0][from]=a&range[0][to]=bu&range[1][from]=ka&range[1][to]=ku
mode	String (including or excluding)	Defines if the articles defined by the range parameter should be the only ones included for the result set (including) or if they should be the only ones not included for the result set (excluding)	excluding	mode=excluding, mode=including

Response

The server responds with a JSON document with the following structure:

[
  {
    "article": "String: article name",
    "views": [
      {
        "date": "String: date in format yyyy-mm-dd-hh",
        "views": "Number: number of views for the corresponding date"
      },
      ...
    ]
  },
  ...
]

Example

GET /articles/names

Provides access to the names of all articles.

Request

The request is parametrized via GET parameters.

Parameter	Type	Description	Default	Example
index	Integral number	The number of the first element returned from the result set.	0	index=10
count	Integral number	The number of elements returned from the result set.	10	count=50
sorting	String (+ or -)	Sorts the articles lexicographically for the result set ascending (+) or descending (-) in respect to their name.	+	sorting=-, sorting=+
filter	String	Fulltext search filter applied to the articles for the result set.	None	filter=Cheese

Response

The server responds with a JSON document with the following structure:

[
  "String: article name 1",
  "String: article name 2",
  ...
]

Example

GET /articles/dates

Provides access all dates, which are recorded.

Request

The request is not parametrized.

Response

The server responds with a JSON document with the following structure:

[
  "String: date 1 in the format yyyy-mm-dd-hh",
  "String: date 2 in the format yyyy-mm-dd-hh",
  ...
]

Example

Development

The project uses NPM as build system. Before you run any of the defined scripts, make sure you ran npm install.

The following targets are available:

clean

Removes all build files.

npm run clean

flow

Typechecks the project with Flow. If no Flow server is already running, it starts a new one.

npm run flow

flow:stop

Stops a possibly running Flow server.

npm run flow:stop

test

Runs unit tests for the project.

npm run test

test:debug

Runs the unit test in a debugger.

npm run test:debug

test:cover

Runs the unit test and generates a coverage report.

npm run test:cover

build

Builds the project. Transpiles all ES6 files and generates the output under lib.

npm run build

build:dev

Builds the project in development mode. It generates source-maps while transpiling.

npm run build:dev

build:docker

Builds the project and a docker container running the server. Make sure, that you have access to a docker daemon.

npm run build:docker

start

Builds the project and runs it locally. The server is configured with the currently set environment variables.

npm run start

start:docker

Builds the project and a docker runs the container. The server is configured with the currently set environment variables.

npm run start:docker