From faf0b97ad184ac447b28f133d9ee4c9534a9328b Mon Sep 17 00:00:00 2001
From: Colin Okay <colin@cicadas.surf>
Date: Mon, 31 Oct 2022 16:18:12 -0500
Subject: Fix: hunchentoot:handle-static-file, private (and temp?) version

---
 hunchentoot-handle-static-file.lisp | 53 +++++++++++++++++++++++++++++++++++++
 vampire.asd                         |  3 ++-
 2 files changed, 55 insertions(+), 1 deletion(-)
 create mode 100644 hunchentoot-handle-static-file.lisp

diff --git a/hunchentoot-handle-static-file.lisp b/hunchentoot-handle-static-file.lisp
new file mode 100644
index 0000000..4db0425
--- /dev/null
+++ b/hunchentoot-handle-static-file.lisp
@@ -0,0 +1,53 @@
+;;;; hunchentoot-handle-static-file.lisp -- a rewrite for our purposes
+
+(in-package :hunchentoot)
+
+;;; MY OWN PRIVATE REIMPLEMENTATION MADE TO IGNORE ERRORS WHEN THE
+;;; BROWSER CLOSES A SOCKET
+(defun hunchentoot:handle-static-file (pathname &optional content-type callback)
+  "A function which acts like a Hunchentoot handler for the file
+denoted by PATHNAME.  Sends a content type header corresponding to
+CONTENT-TYPE or \(if that is NIL) tries to determine the content type
+via the suffix of the file.
+CALLBACK is run just before sending the file, and can be used
+to set headers or check authorization;
+arguments are the filename and the (guessed) content-type."
+  (when (or (wild-pathname-p pathname)
+            (not (fad:file-exists-p pathname))
+            (fad:directory-exists-p pathname))
+    ;; file does not exist
+    (setf (return-code*) +http-not-found+)
+    (abort-request-handler))
+  (unless content-type
+    (setf content-type (mime-type pathname)))
+  (let ((time (or (file-write-date pathname)
+                  (get-universal-time)))
+        bytes-to-send)
+    (setf (content-type*) (or (and content-type
+                                   (maybe-add-charset-to-content-type-header content-type (reply-external-format*)))
+                              "application/octet-stream")
+          (header-out :last-modified) (rfc-1123-date time)
+          (header-out :accept-ranges) "bytes")
+    (handle-if-modified-since time)
+    (unless (null callback)
+      (funcall callback pathname content-type))
+    (with-open-file (file pathname
+                          :direction :input
+                          :element-type 'octet)
+      (setf bytes-to-send (maybe-handle-range-header file)
+            (content-length*) bytes-to-send)
+      (handler-case 
+          (let ((out (send-headers))
+                (buf (make-array +buffer-length+ :element-type 'octet)))
+            (loop
+              (when (zerop bytes-to-send)
+                (return))
+              (let* ((chunk-size (min +buffer-length+ bytes-to-send)))
+                (unless (eql chunk-size (read-sequence buf file :end chunk-size))
+                  (error "can't read from input file"))
+                (write-sequence buf out :end chunk-size)
+                (decf bytes-to-send chunk-size)))
+            (finish-output out))
+        (error (e)
+          (format *error-output* "Caught error while sending static file: ~a~%" e)
+          nil)))))
diff --git a/vampire.asd b/vampire.asd
index 4679228..f9f9717 100644
--- a/vampire.asd
+++ b/vampire.asd
@@ -16,7 +16,8 @@
                #:ironclad
                #:jonathan
                #:swank)
-  :components ((:file "package")
+  :components ((:file "hunchentoot-handle-static-file")
+               (:file "package")
                (:file "definition-macros")
                (:file "utilities")
                (:file "downloader")
-- 
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