From 202ddeac0df83b53a2a3d84e49889259325ace2d Mon Sep 17 00:00:00 2001
From: ed <s@ocv.me>
Date: Thu, 21 Aug 2025 23:06:39 +0000
Subject: [PATCH] write qrcode to file

---
 copyparty/__main__.py         |  1 +
 copyparty/stolen/qrcodegen.py | 19 +++++++++++++++++++
 copyparty/tcpsrv.py           | 32 +++++++++++++++++++++++++++++++-
 tests/util.py                 |  2 +-
 4 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/copyparty/__main__.py b/copyparty/__main__.py
index 8467fd81..3cb97949 100644
--- a/copyparty/__main__.py
+++ b/copyparty/__main__.py
@@ -1115,6 +1115,7 @@ def add_qr(ap, tty):
     ap2.add_argument("--qrz", metavar="N", type=int, default=0, help="[\033[32m1\033[0m]=1x, [\033[32m2\033[0m]=2x, [\033[32m0\033[0m]=auto (try [\033[32m2\033[0m] on broken fonts)")
     ap2.add_argument("--qr-pin", metavar="N", type=int, default=0, help="sticky/pin the qr-code to always stay on-screen; [\033[32m0\033[0m]=disabled, [\033[32m1\033[0m]=with-url, [\033[32m2\033[0m]=just-qr")
     ap2.add_argument("--qr-wait", metavar="SEC", type=float, default=0, help="wait \033[33mSEC\033[0m before printing the qr-code to the log")
+    ap2.add_argument("--qr-file", metavar="TXT", type=u, action="append", help="\033[34mREPEATABLE:\033[0m write qr-code to file.\n └─To create txt or svg, \033[33mTXT\033[0m is Filepath:Zoom:Pad, for example [\033[32mqr.txt:1:2\033[0m]\n └─To create png or gif, \033[33mTXT\033[0m is Filepath:Zoom:Pad:Foreground:Background, for example [\033[32mqr.png:8:2:333333:ffcc55\033[0m], or [\033[32mqr.png:8:2::ffcc55\033[0m] for transparent")
 
 
 def add_fs(ap):
diff --git a/copyparty/stolen/qrcodegen.py b/copyparty/stolen/qrcodegen.py
index 38296359..8790e859 100644
--- a/copyparty/stolen/qrcodegen.py
+++ b/copyparty/stolen/qrcodegen.py
@@ -200,6 +200,25 @@ class QrCode(object):
 
         return "\n".join(rows)
 
+    def to_png(self, zoom, pad, bg, fg, ap) -> None:
+        from PIL import Image
+
+        tab = self.modules
+        sz = self.size
+        psz = sz + pad * 2
+        if bg:
+            img = Image.new("RGB", (psz, psz), bg)
+        else:
+            img = Image.new("RGBA", (psz, psz), (0, 0, 0, 0))
+            fg = (fg[0], fg[1], fg[2], 255)
+        for y in range(sz):
+            for x in range(sz):
+                if tab[y][x]:
+                    img.putpixel((x + pad, y + pad), fg)
+        if zoom != 1:
+            img = img.resize((sz * zoom, sz * zoom), Image.Resampling.NEAREST)
+        img.save(ap)
+
     def _draw_function_patterns(self) -> None:
         # Draw horizontal and vertical timing patterns
         for i in range(self.size):
diff --git a/copyparty/tcpsrv.py b/copyparty/tcpsrv.py
index ff019caa..8d355251 100644
--- a/copyparty/tcpsrv.py
+++ b/copyparty/tcpsrv.py
@@ -9,7 +9,7 @@ import time
 
 from .__init__ import ANYWIN, PY2, TYPE_CHECKING, unicode
 from .cert import gencert
-from .stolen.qrcodegen import QrCode
+from .stolen.qrcodegen import QrCode, qr2svg
 from .util import (
     E_ACCESS,
     E_ADDR_IN_USE,
@@ -621,6 +621,10 @@ class TcpSrv(object):
         pad = self.args.qrp
         zoom = self.args.qrz
         qrc = QrCode.encode_binary(btxt)
+
+        for zs in self.args.qr_file or []:
+            self._qr2file(qrc, zs)
+
         if zoom == 0:
             try:
                 tw, th = termsize()
@@ -656,3 +660,29 @@ class TcpSrv(object):
             t = t.replace("\n", "`\n`")
 
         return txt + t
+
+    def _qr2file(self, qrc: QrCode, txt: str):
+        if ".txt:" in txt or ".svg:" in txt:
+            ap, zs1, zs2 = txt.rsplit(":", 2)
+            bg = fg = ""
+        else:
+            ap, zs1, zs2, bg, fg = txt.rsplit(":", 4)
+        zoom = int(zs1)
+        pad = int(zs2)
+
+        if ap.endswith(".txt"):
+            if zoom not in (1, 2):
+                raise Exception("invalid zoom for qr.txt; must be 1 or 2")
+            with open(ap, "wb") as f:
+                f.write(qrc.render(zoom, pad).encode("utf-8"))
+        elif ap.endswith(".svg"):
+            with open(ap, "wb") as f:
+                f.write(qr2svg(qrc, pad).encode("utf-8"))
+        else:
+            qrc.to_png(zoom, pad, self._h2i(bg), self._h2i(fg), ap)
+
+    def _h2i(self, hs):
+        try:
+            return tuple(int(hs[i : i + 2], 16) for i in (0, 2, 4))
+        except:
+            return None
diff --git a/tests/util.py b/tests/util.py
index 897bc108..2318bab7 100644
--- a/tests/util.py
+++ b/tests/util.py
@@ -170,7 +170,7 @@ class Cfg(Namespace):
         ex = "ban_403 ban_404 ban_422 ban_pw ban_pwc ban_url spinner"
         ka.update(**{k: "no" for k in ex.split()})
 
-        ex = "ext_th grp idp_h_usr idp_hm_usr ipr on403 on404 xac xad xar xau xban xbc xbd xbr xbu xiu xm"
+        ex = "ext_th grp idp_h_usr idp_hm_usr ipr on403 on404 qr_file xac xad xar xau xban xbc xbd xbr xbu xiu xm"
         ka.update(**{k: [] for k in ex.split()})
 
         ex = "exp_lg exp_md"