From 46e77541cfd88ad8ea4dfd46075cfd1bc015abdc Mon Sep 17 00:00:00 2001
From: Dominika Liberda <ja@sdomi.pl>
Date: Tue, 1 Jun 2021 21:14:03 +0200
Subject: [PATCH] + new proxying system

---
 http.sh               |  6 +++---
 src/response/proxy.sh | 30 +++++++++++++++++++++++++++---
 src/server.sh         |  7 ++++---
 3 files changed, 34 insertions(+), 9 deletions(-)

diff --git a/http.sh b/http.sh
index ce26216..b60282f 100755
--- a/http.sh
+++ b/http.sh
@@ -36,9 +36,9 @@ cfg[python_enabled]=false # enable Python script evalutaion (requires Python)
 
 cfg[log]='log' # filename
 
-# proxy functionality is very WiP
-cfg[proxy]=false
-cfg[proxy_url]='http://example.com/'
+cfg[proxy]=false # you probably want to configure this per-url
+cfg[proxy_url]='' # regexp matching valid URLs to proxy
+cfg[proxy_param]='url' # /proxy?url=...
 
 # mail handler config
 cfg[mail]=""
diff --git a/src/response/proxy.sh b/src/response/proxy.sh
index 764237b..59cfb91 100755
--- a/src/response/proxy.sh
+++ b/src/response/proxy.sh
@@ -1,4 +1,28 @@
-printf "HTTP/1.0 200 OK
-${cfg[extra_headers]}\r\n\r\n"
+#!/bin/bash
+url="$(url_decode "$(url_decode "$(sed -E 's/\?/��Lun4_iS_CuTe�/;s/^(.*)��Lun4_iS_CuTe�//;s/'"${cfg[proxy_param]}"'=//g' <<< "${r[url]}")")")"
 
-curl ${cfg[proxy_url]}${r[url]}
\ No newline at end of file
+if [[ $(grep -Poh "${cfg[proxy_url]}" <<< "$url") == '' ]]; then
+	exit 1
+fi
+
+host="$(sed -E 's@http(s|)://@@;s@/.*@@' <<< "$url")"
+headers="$(tr '\r' '\n' <<< "${r[req_headers]}")"
+headers+=$'\n'
+
+while read line; do
+	if [[ "$line" == "GET"* ]]; then
+		if [[ "$url" == *"$host" ]]; then
+			echo "GET / HTTP/1.1"
+		else
+			echo "GET /$(sed -E 's@http(s|)://@@;s@/@��Lun4_iS_CuTe�@;s@.*��Lun4_iS_CuTe�@@' <<< "$url") HTTP/1.1"
+		fi
+	elif [[ "$line" == *"Host"* ]]; then
+		echo "Host: $url" | sed -E 's@http(s|)://@@;s@/.*@@'
+	else
+		echo "$line"
+	fi
+done <<< "$headers" | if [[ "$url" == "https"* ]]; then
+	nc $host 443 --ssl -C -i 0.1 --no-shutdown
+else
+	nc $host 80 -C -i 0.1 --no-shutdown
+fi
diff --git a/src/server.sh b/src/server.sh
index ef0903d..190bcb7 100755
--- a/src/server.sh
+++ b/src/server.sh
@@ -16,9 +16,11 @@ declare -A post_data # all POST params
 declare -A params # parsed router data
 
 r[status]=210 # Mommy always said that I was special
+r[req_headers]=''
 post_length=0
 
 while read -r param; do
+	r[req_headers]+="$param"
 	param_l="${param,,}" # lowercase
 	name=''
 	value=''
@@ -160,6 +162,8 @@ fi
 
 echo "${r[url]}" >&2
 
+# the app config gets loaded a second time to allow for path-specific config modification
+[[ -f "${cfg[namespace]}/config.sh" ]] && source "${cfg[namespace]}/config.sh"
 
 if [[ "${cfg[auth_required]}" == true && "${r[authorized]}" != true ]]; then
 	echo "Auth failed." >> ${cfg[log_misc]}
@@ -213,9 +217,6 @@ if [[ "${r[post]}" == true && "${r[status]}" == 200 ]]; then
 	fi
 fi
 
-# the app config gets loaded a second time to allow for path-specific config modification
-[[ -f "${cfg[namespace]}/config.sh" ]] && source "${cfg[namespace]}/config.sh"
-
 if [[ ${r[status]} == 210 && ${cfg[autoindex]} == true ]]; then
 	source "src/response/listing.sh"
 elif [[ ${r[status]} == 211 ]]; then