GDAL export container

exporter/.bundle/config

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+---
+BUNDLE_PATH: "vendor/bundle"
+BUNDLE_DISABLE_SHARED_GEMS: "true"

exporter/Dockerfile

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+# Debian base
+FROM debian:buster
+
+MAINTAINER Sebastian Silva <sebastian@fuentelibre.org>
+
+# Install the application.
+RUN apt-get update -qq && apt-get install -y gdal-bin ruby imagemagick
+
+# Externally accessible data is by default put in /data
+WORKDIR /data
+VOLUME ["/data"]
+
+# Output version and capabilities by default.
+CMD gdalinfo --version && gdalinfo --formats && ogrinfo --formats
+

exporter/Gemfile

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+# Copyright 2015 Google, Inc
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# [START gae_flex_quickstart_dependencies]
+source "https://rubygems.org"
+
+gem "sinatra"
+# [END gae_flex_quickstart_dependencies]
+
+group :test do
+  gem "rspec"
+  gem "rack-test"
+end

exporter/app.rb

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+# Copyright 2015 Google, Inc
+# Copyright 2019 Public Lab
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require "sinatra"
+require "json"
+
+get "/" do
+  markdown :landing
+end
+
+
+post '/export' do
+  unless params[:metadata] &&
+       (tmpfile = params[:metadata][:tempfile]) &&
+       (name = params[:metadata][:filename])
+    @error = "No file selected"
+    return markdown :landing
+  end
+  STDERR.puts "Uploading file, original name #{name.inspect}"
+  @data = JSON.parse(tmpfile.read)
+  String @data[0]['image_file_name']
+end

exporter/app.yaml

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+# Copyright 2015 Google, Inc
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# [START gae_flex_quickstart_yaml]
+runtime: ruby
+env: flex
+entrypoint: bundle exec ruby app.rb
+
+# This sample incurs costs to run on the App Engine flexible environment.
+# The settings below are to reduce costs during testing and are not appropriate
+# for production use. For more information, see:
+# https://cloud.google.com/appengine/docs/flexible/ruby/configuring-your-app-with-app-yaml
+manual_scaling:
+  instances: 1
+resources:
+  cpu: 1
+  memory_gb: 0.5
+  disk_size_gb: 10
+
+# [END gae_flex_quickstart_yaml]

exporter/spec/hello_world_spec.rb

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+# Copyright 2015 Google, Inc
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require_relative "../app.rb"
+require "rspec"
+require "rack/test"
+
+describe "Hello World" do
+  include Rack::Test::Methods
+
+  def app
+    Sinatra::Application
+  end
+
+  it "displays hello world text" do
+    get "/"
+    expect(last_response.body).to eq("Hello world!")
+  end
+end

exporter/views/landing.markdown

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+# Mapknitter Exporter
+
+Welcome to the Mapknitter export API!
+
+Please provide a json file such as <a href="https://mapknitter.org/maps/irish-uk-border-mapping/warpables.json">this</a>.
+
+You can create it online with <a href="https://mapknitter.org/">Mapknitter</a>!
+
+<form action="/export" method="POST" enctype='multipart/form-data'>
+    <input name="metadata" type="file" label="Post a json file" />
+    <input type="submit" value="Send" />
+</form>
+
+
+<style>
+    html {
+        background-color: #e5e520;
+    }
+    body {
+        margin: auto;
+        border-left: 5px solid brown;
+        width: 80%;
+        font-family: Sans;
+        background-color: lightYellow;
+        padding: 2em;
+    }
+</style>