squid/SOURCES/squid-4.15-ftp-filename-extraction.patch

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diff --git a/src/clients/FtpGateway.cc b/src/clients/FtpGateway.cc
index da9867f..e992638 100644
--- a/src/clients/FtpGateway.cc
+++ b/src/clients/FtpGateway.cc
@@ -1084,16 +1084,17 @@ Ftp::Gateway::checkAuth(const HttpHeader * req_hdr)
void
Ftp::Gateway::checkUrlpath()
{
- static SBuf str_type_eq("type=");
- auto t = request->url.path().rfind(';');
-
- if (t != SBuf::npos) {
- auto filenameEnd = t-1;
- if (request->url.path().substr(++t).cmp(str_type_eq, str_type_eq.length()) == 0) {
- t += str_type_eq.length();
- typecode = (char)xtoupper(request->url.path()[t]);
- request->url.path(request->url.path().substr(0,filenameEnd));
- }
+ // If typecode was specified, extract it and leave just the filename in
+ // url.path. Tolerate trailing garbage or missing typecode value. Roughly:
+ // [filename] ;type=[typecode char] [trailing garbage]
+ static const SBuf middle(";type=");
+ const auto typeSpecStart = request->url.path().find(middle);
+ if (typeSpecStart != SBuf::npos) {
+ const auto fullPath = request->url.path();
+ const auto typecodePos = typeSpecStart + middle.length();
+ typecode = (typecodePos < fullPath.length()) ?
+ static_cast<char>(xtoupper(fullPath[typecodePos])) : '\0';
+ request->url.path(fullPath.substr(0, typeSpecStart));
}
int l = request->url.path().length();