From 2afe9b76c613f3edf74ebd2156e1ae78ac971960 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Paul=20H=C3=A4nsch?= <paul@plutz.net>
Date: Thu, 14 Apr 2022 16:22:26 +0200
Subject: [PATCH] filename function

---
 multipart.sh | 34 ++++++++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

diff --git a/multipart.sh b/multipart.sh
index 09b1765..70270f6 100644
--- a/multipart.sh
+++ b/multipart.sh
@@ -34,7 +34,7 @@ multipart_cache() {
 }
 
 multipart(){
-  local name="$1"
+  local name="$1" count="${2:-1}"
   local formdata state=begin
 
   while read -r formdata; do case "$formdata" in
@@ -47,7 +47,8 @@ multipart(){
                         || state=header
       ;;
     "Content-Disposition: form-data; name=\"${name}\""*"${CR}")
-      [ $state = header ] && state=dheader
+      [ $state = header -a $count -eq 1 ] && state=dheader
+      [ $state = header -a $count -gt 1 ] && count=$((count - 1))
       [ $state = data ] && printf "%s\n" "$formdata"
       ;;
     "${CR}")
@@ -59,3 +60,32 @@ multipart(){
       ;;
   esac; done <"${multipart_cachefile}"
 }
+
+multipart_filename(){
+  local name="$1" count="${2:-1}"
+  local formdata state=begin
+
+  while read -r formdata; do case "$formdata" in
+    "--${multipart_boundary}--${CR}")
+      return 1
+      ;;
+    "--${multipart_boundary}${CR}")
+      state=header
+      ;;
+    "Content-Disposition: form-data; name=\"${name}\"; filename=\""*"\""*"${CR}")
+      [ $state = header -a $count -eq 1 ] && break
+      [ $state = header -a $count -gt 1 ] && count=$((count - 1))
+      ;;
+    "${CR}")
+      [ $state = header ] && state=junk
+      ;;
+    *):
+      ;;
+  esac; done <"${multipart_cachefile}"
+
+  filename="${formdata#*; filename=\"}"
+  filename="${filename%%\"${CR}}"
+  filename="${filename%%\";*}"
+
+  HEX_DECODE % "$filename"
+}
-- 
2.39.2