tilecache: generate nginx QoS maps

[chef.git] / cookbooks / tilecache / templates / default / nginx_generate_tilecache_qos_map.erb

diff --git a/cookbooks/tilecache/templates/default/nginx_generate_tilecache_qos_map.erb b/cookbooks/tilecache/templates/default/nginx_generate_tilecache_qos_map.erb
new file mode 100755 (executable)
index 0000000..c0ae1f0
--- /dev/null
+++ b/cookbooks/tilecache/templates/default/nginx_generate_tilecache_qos_map.erb
@@ -0,0 +1,42 @@
+#!/bin/bash
+# DO NOT EDIT - This file is being maintained by Chef
+
+set -e
+NUM_TOKENS=3 # current + 3
+VALID_TOKEN=3600 # in seconds
+QOS_TOKENS=($(/usr/bin/oathtool --totp --window=${NUM_TOKENS} --time-step-size=${VALID_TOKEN}s <%= tokens[:tilecache_oath_key] %>))
+
+# ${qos_tokens[3]/[-1] } = OSM.org exclusive / current
+# ${qos_tokens[2]/[-2] } = tile.openstreetmap.org default
+# ${qos_tokens[1]/[-3] } = stale ~ 1 hour
+# ${qos_tokens[0]} = expired
+
+# Test if number of tokens returned by oathtool is expected number
+if [ "${#QOS_TOKENS[@]}" -ne "$((${NUM_TOKENS}+1))" ]; then
+  >&2 echo "ERROR: Unexpected number of tokens"
+  exit 1
+fi
+
+QOS_TOKEN_OSM=${QOS_TOKENS[-1]} # Cookie set by openstreetmap.org
+QOS_TOKEN_DEFAULT=${QOS_TOKENS[-2]} # Cookie presented by tile.openstreetmap.org to browsers
+QOS_TOKEN_STALE=${QOS_TOKENS[-3]} # Cookie which has become stale and will be replaced
+
+if [ -z "$QOS_TOKEN_OSM" -o -z "$QOS_TOKEN_DEFAULT" -o -z "$QOS_TOKEN_STALE" ]; then
+  >&2 echo "ERROR: Unexpected blank token"
+  exit 2
+fi
+
+cat <<EOF >/etc/nginx/conf.d/tile_qos_rates.map
+default 4096; # Default Rate (No QoS cookie)
+"${QOS_TOKEN_STALE}" 16384; # Stale
+"${QOS_TOKEN_DEFAULT}" 24576; # Default
+"${QOS_TOKEN_OSM}" 32768; # Exclusive
+EOF
+
+cat <<EOF >/etc/nginx/conf.d/tile_qos_cookies.map
+default 'qos_token=${QOS_TOKEN_DEFAULT}; Secure; httponly; Max-Age=${VALID_TOKEN}; Domain=tile.openstreetmap.org; Path=/'; # Cookie Domain per RFC6265
+"${QOS_TOKEN_DEFAULT}" ''; # Do not Set-Cookie. # Default
+"${QOS_TOKEN_OSM}" ''; # Do not Set-Cookie. # Exclusive
+EOF
+
+/etc/init.d/nginx configtest && service nginx reload