commit a6bcfca0d8de4ecfe00edc40189d266f8f5f30c6
Author: Emilis Dambauskas <dev@emilis.net>
Date:   Sun Nov 29 17:27:03 2020 +0200

    Initial commit.

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..df91287
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+certs/
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..ed0598f
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,54 @@
+CERT_DAYS=10000
+COMMAND="./server-main.sh"
+COUNTRY=LT
+DOMAIN=localhost
+
+
+.PHONY: default
+default: server
+
+
+### Server ---------------------------------------------------------------------
+
+.PHONY: server
+server: socat-server
+
+
+.PHONY: ncat-server
+ncat-server: certs
+	ncat -v \
+		--listen --keep-open -p 1965 \
+		--ssl --ssl-cert "certs/${DOMAIN}.crt" --ssl-key "certs/${DOMAIN}.key" \
+		-c "${COMMAND}"
+
+
+.PHONY: socat-server
+socat-server: certs
+	socat -d \
+		OPENSSL-LISTEN:1965,cert=certs/${DOMAIN}.crt,key=certs/${DOMAIN}.key,verify=0,reuseaddr,fork \
+		EXEC:${COMMAND}
+
+
+### Certificates ---------------------------------------------------------------
+
+.PHONY: show-cert
+show-cert:
+	openssl x509 -in "certs/${DOMAIN}.crt" -text
+
+
+.PHONY: clean-certs
+clean-certs:
+	rm "certs/${DOMAIN}"*
+
+
+.PHONY: certs
+certs: \
+	certs/${DOMAIN}.crt
+
+
+certs/${DOMAIN}.crt: certs/${DOMAIN}.key
+	echo -en ".\n.\n.\n.\n.\n${DOMAIN}\n.\n" | \
+		openssl req -x509 -key "certs/${DOMAIN}.key" -out "$@" -days ${CERT_DAYS} -nodes
+
+certs/${DOMAIN}.key:
+	openssl genrsa -out "$@" 4096
diff --git a/server-main.sh b/server-main.sh
new file mode 100755
index 0000000..81bed76
--- /dev/null
+++ b/server-main.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/sh
+
+read -r URL GARBAGE;
+
+REQUEST_URL=${URL%?};       # Remove "\r" at the end
+URL_NO_PROTOCOL=${REQUEST_URL#*://}
+REQUEST_PATH=/${URL_NO_PROTOCOL#*/}
+REQUEST_QUERY=${URL#*\?}
+
+echo "$REQUEST_PATH" | awk \
+    -v REQUEST_PATH="$REQUEST_PATH" \
+    -v REQUEST_QUERY="$REQUEST_QUERY" \
+    -v REQUEST_URL="$REQUEST_URL" \
+    -f srv/exec.awk \
+    -f srv/response.awk \
+    -f srv/tags.awk \
+    -f srv/main.awk
diff --git a/srv/exec.awk b/srv/exec.awk
new file mode 100644
index 0000000..99e4956
--- /dev/null
+++ b/srv/exec.awk
@@ -0,0 +1,5 @@
+function exec_to_string( cmd ) {
+    cmd | getline getline_output;
+    close( cmd );
+    return getline_output;
+}
diff --git a/srv/main.awk b/srv/main.awk
new file mode 100644
index 0000000..3d67571
--- /dev/null
+++ b/srv/main.awk
@@ -0,0 +1,25 @@
+REQUEST_PATH ~ /^\/test/ {
+    response_reset();
+
+    h1( "Test path" );
+    println( "^/test matched" );
+    pre( REQUEST_URL );
+    link( "/", "Back to home" );
+
+    response_ok();
+}
+
+REQUEST_PATH == "/" {
+    response_reset();
+
+    h1( "Hello World from Awk!" );
+    println( "This is a test." );
+    pre( REQUEST_URL );
+    link( "/test123", "A test page" );
+
+    println( "Updated " \
+        exec_to_string( "date --iso-8601=seconds" ) \
+    );
+
+    response_ok();
+}
diff --git a/srv/response.awk b/srv/response.awk
new file mode 100644
index 0000000..240defb
--- /dev/null
+++ b/srv/response.awk
@@ -0,0 +1,22 @@
+BEGIN {
+    response_code = "51"
+    response_meta = "text/gemini"
+    response_body = ""
+}
+
+END {
+    printf "%s %s\r\n", response_code, response_meta;
+    print response_body
+}
+
+function response_ok() {
+    response_code = "20"
+}
+
+function response_reset() {
+    response_body = ""
+}
+
+function println( arg ) {
+    response_body = response_body "\n" arg;
+}
diff --git a/srv/tags.awk b/srv/tags.awk
new file mode 100644
index 0000000..261efa6
--- /dev/null
+++ b/srv/tags.awk
@@ -0,0 +1,31 @@
+function h1( text ) {
+
+    println( "#" text );
+}
+
+function h2( text ) {
+
+    println( "##" text );
+}
+
+function h3( text ) {
+
+    println( "###" text );
+}
+
+function li( text ) {
+
+    println( "* " text );
+}
+
+function link( url, text ) {
+    
+    println( "=> " url " " text );
+}
+
+function pre( text ) {
+
+    println( "```" );
+    println( text );
+    println( "```" );
+}