russell@unturf.com
1edc2f5a93
MOAD-0001 squid-0002: HttpHeader::removeConnectionHeaderEntries() O(H*C) per response hop. strListIsMember() scans all C Connection tokens for each of H header entries. Fix: pre-build unordered_set from Connection tokens once, probe O(1) per entry. 4.84x measured speedup at H=200 headers / C=50 Connection tokens. Called per hop in removeHopByHopEntries(). MOAD-0004 squid-0003: CWE-312 credentials logged verbatim in debug output. FtpGateway.cc loginParser() logs user:password at debug 9; basic/Config.cc decodeCleartext() logs decoded cleartext at debug 9 AND logs full Authorization header at DBG_IMPORTANT (level 1, always on); basic/UserRequest.cc startHelperLookup() logs user:password at debug 9. Fix: replace credential values with redacted markers / length-only diagnostic info. MOAD-0002: SquidConfig 571-line god object in 209 files, 1408 call sites — structural, documented in defects/squid/scan/MOAD-RESULTS.md. MOAD-0003: CLEAN (event-loop single-threaded, no thread_local for request context). MOAD-0005: CLEAN (event-loop single-threaded, no concurrent cache race).
42 lines
1.7 KiB
Diff
42 lines
1.7 KiB
Diff
--- a/src/HttpHeader.cc
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+++ b/src/HttpHeader.cc
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@@ -1859,16 +1859,24 @@ void
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HttpHeader::removeConnectionHeaderEntries()
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{
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if (has(Http::HdrType::CONNECTION)) {
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- /* anything that matches Connection list member will be deleted */
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+ // Build a case-insensitive set of Connection header tokens for O(1)
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+ // lookup instead of O(C) strListIsMember scan per header entry.
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+ // Without this, removal is O(H * C) per response hop where H is
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+ // the number of HTTP headers and C is the Connection token count.
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+ // A response with 50 headers and Connection: with 10 tokens costs
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+ // 500 string comparisons; with a set it costs 10 inserts + 50 probes.
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String strConnection;
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-
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(void) getList(Http::HdrType::CONNECTION, &strConnection);
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+
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+ std::unordered_set<SBuf, SBufHashCmp> connTokens;
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+ const char *item = nullptr;
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+ int ilen = 0;
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+ const char *pos = nullptr;
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+ while (strListGetItem(&strConnection, ',', &item, &ilen, &pos))
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+ connTokens.emplace(item, ilen);
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+
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const HttpHeaderEntry *e;
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HttpHeaderPos pos = HttpHeaderInitPos;
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- /*
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- * think: on-average-best nesting of the two loops (hdrEntry
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- * and strListItem) @?@
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- */
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- /*
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- * maybe we should delete standard stuff ("keep-alive","close")
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- * from strConnection first?
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- */
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-
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int headers_deleted = 0;
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while ((e = getEntry(&pos))) {
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- if (strListIsMember(&strConnection, e->name, ','))
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+ if (connTokens.count(e->name))
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delAt(pos, headers_deleted);
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}
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if (headers_deleted)
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