add new python-pgsql example

examples/python-pgsql/.gitignore

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+*.o
+.flavor
+.objs
+python-pgsql.so
+assets.h
+cert

examples/python-pgsql/conf/build.conf

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+# python-pgsql build config
+# You can switch flavors using: kore flavor [newflavor]
+
+# Set to yes if you wish to produce a single binary instead
+# of a dynamic library. If you set this to yes you must also
+# set kore_source together with kore_flavor and update ldflags
+# to include the appropriate libraries you will be linking with.
+#single_binary=no
+#kore_source=/home/joris/src/kore
+#kore_flavor=
+
+# The flags below are shared between flavors
+cflags=-Wall -Wmissing-declarations -Wshadow
+cflags=-Wstrict-prototypes -Wmissing-prototypes
+cflags=-Wpointer-arith -Wcast-qual -Wsign-compare
+
+cxxflags=-Wall -Wmissing-declarations -Wshadow
+cxxflags=-Wpointer-arith -Wcast-qual -Wsign-compare
+
+# Mime types for assets served via the builtin asset_serve_*
+#mime_add=txt:text/plain; charset=utf-8
+#mime_add=png:image/png
+#mime_add=html:text/html; charset=utf-8
+
+dev {
+	# These flags are added to the shared ones when
+	# you build the "dev" flavor.
+	cflags=-g
+	cxxflags=-g
+}
+
+#prod {
+#	You can specify additional flags here which are only
+#	included if you build with the "prod" flavor.
+#}

examples/python-pgsql/conf/python-pgsql.conf

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+# python-pgsql configuration
+
+bind		127.0.0.1 8888
+
+python_import	src/query.py
+
+tls_dhparam	dh2048.pem
+
+domain * {
+	certfile		cert/server.crt
+	certkey			cert/server.key
+
+	static	/		query
+	static	/hello		hello
+	static	/slow		slow
+}

examples/python-pgsql/src/query.py

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+#
+# Copyright (c) 2017 Joris Vink <joris@coders.se>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+
+# Asynchronous postgresql queries with Python.
+
+import json
+import kore
+
+# Register the path to our database when the worker starts.
+def kore_worker_configure():
+	kore.register_database("db", "host=/tmp dbname=kore")
+
+# A handler that returns 200 OK with hello as body.
+def hello(req):
+	req.response(200, b'hello\n')
+
+#
+# The query handler that fires of the query and returns a coroutine.
+#
+# Kore will resume this handler when the query returns a result or
+# is succesfull.
+#
+# The req.pgsql() method can throw exceptions, most notably a
+# GeneratorExit in case the client connection went away before
+# the query was able to be completed.
+#
+# In this example we're not doing any exception handling.
+#
+async def query(req):
+	result = await req.pgsql("db", "SELECT * FROM coders")
+	req.response(200, json.dumps(result).encode("utf-8"))
+
+#
+# A slow query that returns after 10 seconds.
+#
+async def slow(req):
+	result = await req.pgsql("db", "SELECT * FROM pg_sleep(10)")
+	req.response(200, json.dumps(result).encode("utf-8"))