masaori335 commented on code in PR #13475:
URL: https://github.com/apache/trafficserver/pull/13475#discussion_r3725245039
##########
plugins/slice/client.cc:
##########
@@ -19,9 +19,46 @@
#include "client.h"
#include "Config.h"
+#include "server.h"
#include "util.h"
+#include "swoc/TextView.h"
+
+#include <cctype>
#include <cinttypes>
+#include <limits>
+
+namespace
+{
+// Miss bound for this purge: the request header when usable, else the config
value.
+int
+purge_miss_bound(HttpHeader const &header, Config const *const conf)
+{
+ char probestr[64];
+ int probelen = sizeof(probestr);
+
+ if (!header.valueForKey(conf->m_purge_probe_header.data(),
conf->m_purge_probe_header.size(), probestr, &probelen)) {
+ return conf->m_purge_probe_blocks;
+ }
+
+ swoc::TextView value{probestr, static_cast<size_t>(probelen)};
+ // isspace is only defined for values representable as unsigned char
+ value.trim_if([](char c) { return 0 != isspace(static_cast<unsigned
char>(c)); });
+
+ swoc::TextView parsed;
+ intmax_t const blocks = swoc::svtoi(value, &parsed, 10);
+
+ // parsed must cover the whole value: "8abc" is a mistake, not eight blocks
+ if (parsed.size() != value.size() || blocks <= 0 ||
std::numeric_limits<int>::max() < blocks) {
+ ERROR_LOG("Ignoring invalid %.*s value '%.*s'",
static_cast<int>(conf->m_purge_probe_header.size()),
Review Comment:
Done by
[1fda6ba](https://github.com/apache/trafficserver/pull/13475/commits/1fda6bab5ff685912031a16c1e171deb91721e58)
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