1 files changed, 26 insertions, 0 deletions
diff --git a/testing/web-platform/tests/FileAPI/file/resources/echo-content-escaped.py b/testing/web-platform/tests/FileAPI/file/resources/echo-content-escaped.py
new file mode 100644
index 0000000000..5370e1e46a
--- /dev/null
+++ b/testing/web-platform/tests/FileAPI/file/resources/echo-content-escaped.py
@@ -0,0 +1,26 @@
+from wptserve.utils import isomorphic_encode
+
+# Outputs the request body, with controls and non-ASCII bytes escaped
+# (b"\n" becomes b"\\x0a"), and with backslashes doubled.
+# As a convenience, CRLF newlines are left as is.
+
+def escape_byte(byte):
+    # Convert int byte into a single-char binary string.
+    byte = bytes([byte])
+    if b"\0" <= byte <= b"\x1F" or byte >= b"\x7F":
+        return b"\\x%02x" % ord(byte)
+    if byte == b"\\":
+        return b"\\\\"
+    return byte
+
+def main(request, response):
+
+    headers = [(b"X-Request-Method", isomorphic_encode(request.method)),
+               (b"X-Request-Content-Length", request.headers.get(b"Content-Length", b"NO")),
+               (b"X-Request-Content-Type", request.headers.get(b"Content-Type", b"NO")),
+               # Avoid any kind of content sniffing on the response.
+               (b"Content-Type", b"text/plain; charset=UTF-8")]
+
+    content = b"".join(map(escape_byte, request.body)).replace(b"\\x0d\\x0a", b"\r\n")
+
+    return headers, content