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-rw-r--r--src/shrpx_log.cc1008
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diff --git a/src/shrpx_log.cc b/src/shrpx_log.cc
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--- /dev/null
+++ b/src/shrpx_log.cc
@@ -0,0 +1,1008 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "shrpx_log.h"
+
+#ifdef HAVE_SYSLOG_H
+# include <syslog.h>
+#endif // HAVE_SYSLOG_H
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif // HAVE_UNISTD_H
+#ifdef HAVE_INTTYPES_H
+# include <inttypes.h>
+#endif // HAVE_INTTYPES_H
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifdef HAVE_FCNTL_H
+# include <fcntl.h>
+#endif // HAVE_FCNTL_H
+#include <sys/wait.h>
+
+#include <cerrno>
+#include <cstdio>
+#include <cstring>
+#include <ctime>
+#include <iostream>
+#include <iomanip>
+
+#include "shrpx_config.h"
+#include "shrpx_downstream.h"
+#include "shrpx_worker.h"
+#include "util.h"
+#include "template.h"
+
+using namespace nghttp2;
+
+namespace shrpx {
+
+namespace {
+constexpr StringRef SEVERITY_STR[] = {
+ StringRef::from_lit("INFO"), StringRef::from_lit("NOTICE"),
+ StringRef::from_lit("WARN"), StringRef::from_lit("ERROR"),
+ StringRef::from_lit("FATAL")};
+} // namespace
+
+namespace {
+constexpr const char *SEVERITY_COLOR[] = {
+ "\033[1;32m", // INFO
+ "\033[1;36m", // NOTICE
+ "\033[1;33m", // WARN
+ "\033[1;31m", // ERROR
+ "\033[1;35m", // FATAL
+};
+} // namespace
+
+#ifndef NOTHREADS
+# ifdef HAVE_THREAD_LOCAL
+namespace {
+thread_local LogBuffer logbuf_;
+} // namespace
+
+namespace {
+LogBuffer *get_logbuf() { return &logbuf_; }
+} // namespace
+# else // !HAVE_THREAD_LOCAL
+namespace {
+pthread_key_t lckey;
+pthread_once_t lckey_once = PTHREAD_ONCE_INIT;
+} // namespace
+
+namespace {
+void make_key() { pthread_key_create(&lckey, nullptr); }
+} // namespace
+
+LogBuffer *get_logbuf() {
+ pthread_once(&lckey_once, make_key);
+ auto buf = static_cast<LogBuffer *>(pthread_getspecific(lckey));
+ if (!buf) {
+ buf = new LogBuffer();
+ pthread_setspecific(lckey, buf);
+ }
+ return buf;
+}
+# endif // !HAVE_THREAD_LOCAL
+#else // NOTHREADS
+namespace {
+LogBuffer *get_logbuf() {
+ static LogBuffer logbuf;
+ return &logbuf;
+}
+} // namespace
+#endif // NOTHREADS
+
+int Log::severity_thres_ = NOTICE;
+
+void Log::set_severity_level(int severity) { severity_thres_ = severity; }
+
+int Log::get_severity_level_by_name(const StringRef &name) {
+ for (size_t i = 0, max = array_size(SEVERITY_STR); i < max; ++i) {
+ if (name == SEVERITY_STR[i]) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+int severity_to_syslog_level(int severity) {
+ switch (severity) {
+ case (INFO):
+ return LOG_INFO;
+ case (NOTICE):
+ return LOG_NOTICE;
+ case (WARN):
+ return LOG_WARNING;
+ case (ERROR):
+ return LOG_ERR;
+ case (FATAL):
+ return LOG_CRIT;
+ default:
+ return -1;
+ }
+}
+
+Log::Log(int severity, const char *filename, int linenum)
+ : buf_(*get_logbuf()),
+ begin_(buf_.data()),
+ end_(begin_ + buf_.size()),
+ last_(begin_),
+ filename_(filename),
+ flags_(0),
+ severity_(severity),
+ linenum_(linenum),
+ full_(false) {}
+
+Log::~Log() {
+ int rv;
+ auto config = get_config();
+
+ if (!config) {
+ return;
+ }
+
+ auto lgconf = log_config();
+
+ auto &errorconf = config->logging.error;
+
+ if (!log_enabled(severity_) ||
+ (lgconf->errorlog_fd == -1 && !errorconf.syslog)) {
+ return;
+ }
+
+ if (errorconf.syslog) {
+ if (severity_ == NOTICE) {
+ syslog(severity_to_syslog_level(severity_), "[%s] %.*s",
+ SEVERITY_STR[severity_].c_str(), static_cast<int>(rleft()),
+ begin_);
+ } else {
+ syslog(severity_to_syslog_level(severity_), "[%s] %.*s (%s:%d)",
+ SEVERITY_STR[severity_].c_str(), static_cast<int>(rleft()), begin_,
+ filename_, linenum_);
+ }
+
+ return;
+ }
+
+ char buf[4_k];
+ auto tty = lgconf->errorlog_tty;
+
+ lgconf->update_tstamp_millis(std::chrono::system_clock::now());
+
+ // Error log format: <datetime> <main-pid> <current-pid>
+ // <thread-id> <level> (<filename>:<line>) <msg>
+ rv = snprintf(buf, sizeof(buf), "%s %d %d %s %s%s%s (%s:%d) %.*s\n",
+ lgconf->tstamp->time_iso8601.c_str(), config->pid, lgconf->pid,
+ lgconf->thread_id.c_str(), tty ? SEVERITY_COLOR[severity_] : "",
+ SEVERITY_STR[severity_].c_str(), tty ? "\033[0m" : "",
+ filename_, linenum_, static_cast<int>(rleft()), begin_);
+
+ if (rv < 0) {
+ return;
+ }
+
+ auto nwrite = std::min(static_cast<size_t>(rv), sizeof(buf) - 1);
+
+ while (write(lgconf->errorlog_fd, buf, nwrite) == -1 && errno == EINTR)
+ ;
+}
+
+Log &Log::operator<<(const std::string &s) {
+ write_seq(std::begin(s), std::end(s));
+ return *this;
+}
+
+Log &Log::operator<<(const StringRef &s) {
+ write_seq(std::begin(s), std::end(s));
+ return *this;
+}
+
+Log &Log::operator<<(const char *s) {
+ write_seq(s, s + strlen(s));
+ return *this;
+}
+
+Log &Log::operator<<(const ImmutableString &s) {
+ write_seq(std::begin(s), std::end(s));
+ return *this;
+}
+
+Log &Log::operator<<(long long n) {
+ if (n >= 0) {
+ return *this << static_cast<uint64_t>(n);
+ }
+
+ if (flags_ & fmt_hex) {
+ write_hex(n);
+ return *this;
+ }
+
+ if (full_) {
+ return *this;
+ }
+
+ n *= -1;
+
+ size_t nlen = 0;
+ for (auto t = n; t; t /= 10, ++nlen)
+ ;
+ if (wleft() < 1 /* sign */ + nlen) {
+ full_ = true;
+ return *this;
+ }
+ *last_++ = '-';
+ last_ += nlen;
+ update_full();
+
+ auto p = last_ - 1;
+ for (; n; n /= 10) {
+ *p-- = (n % 10) + '0';
+ }
+ return *this;
+}
+
+Log &Log::operator<<(unsigned long long n) {
+ if (flags_ & fmt_hex) {
+ write_hex(n);
+ return *this;
+ }
+
+ if (full_) {
+ return *this;
+ }
+
+ if (n == 0) {
+ *last_++ = '0';
+ update_full();
+ return *this;
+ }
+ size_t nlen = 0;
+ for (auto t = n; t; t /= 10, ++nlen)
+ ;
+ if (wleft() < nlen) {
+ full_ = true;
+ return *this;
+ }
+
+ last_ += nlen;
+ update_full();
+
+ auto p = last_ - 1;
+ for (; n; n /= 10) {
+ *p-- = (n % 10) + '0';
+ }
+ return *this;
+}
+
+Log &Log::operator<<(double n) {
+ if (full_) {
+ return *this;
+ }
+
+ auto left = wleft();
+ auto rv = snprintf(reinterpret_cast<char *>(last_), left, "%.9f", n);
+ if (rv > static_cast<int>(left)) {
+ full_ = true;
+ return *this;
+ }
+
+ last_ += rv;
+ update_full();
+
+ return *this;
+}
+
+Log &Log::operator<<(long double n) {
+ if (full_) {
+ return *this;
+ }
+
+ auto left = wleft();
+ auto rv = snprintf(reinterpret_cast<char *>(last_), left, "%.9Lf", n);
+ if (rv > static_cast<int>(left)) {
+ full_ = true;
+ return *this;
+ }
+
+ last_ += rv;
+ update_full();
+
+ return *this;
+}
+
+Log &Log::operator<<(bool n) {
+ if (full_) {
+ return *this;
+ }
+
+ *last_++ = n ? '1' : '0';
+ update_full();
+
+ return *this;
+}
+
+Log &Log::operator<<(const void *p) {
+ if (full_) {
+ return *this;
+ }
+
+ write_hex(reinterpret_cast<uintptr_t>(p));
+
+ return *this;
+}
+
+namespace log {
+void hex(Log &log) { log.set_flags(Log::fmt_hex); };
+
+void dec(Log &log) { log.set_flags(Log::fmt_dec); };
+} // namespace log
+
+namespace {
+template <typename OutputIterator>
+std::pair<OutputIterator, OutputIterator> copy(const char *src, size_t srclen,
+ OutputIterator d_first,
+ OutputIterator d_last) {
+ auto nwrite =
+ std::min(static_cast<size_t>(std::distance(d_first, d_last)), srclen);
+ return std::make_pair(std::copy_n(src, nwrite, d_first), d_last);
+}
+} // namespace
+
+namespace {
+template <typename OutputIterator>
+std::pair<OutputIterator, OutputIterator>
+copy(const char *src, OutputIterator d_first, OutputIterator d_last) {
+ return copy(src, strlen(src), d_first, d_last);
+}
+} // namespace
+
+namespace {
+template <typename OutputIterator>
+std::pair<OutputIterator, OutputIterator>
+copy(const StringRef &src, OutputIterator d_first, OutputIterator d_last) {
+ return copy(src.c_str(), src.size(), d_first, d_last);
+}
+} // namespace
+
+namespace {
+template <size_t N, typename OutputIterator>
+std::pair<OutputIterator, OutputIterator>
+copy_l(const char (&src)[N], OutputIterator d_first, OutputIterator d_last) {
+ return copy(src, N - 1, d_first, d_last);
+}
+} // namespace
+
+namespace {
+template <typename OutputIterator>
+std::pair<OutputIterator, OutputIterator> copy(char c, OutputIterator d_first,
+ OutputIterator d_last) {
+ if (d_first == d_last) {
+ return std::make_pair(d_last, d_last);
+ }
+ *d_first++ = c;
+ return std::make_pair(d_first, d_last);
+}
+} // namespace
+
+namespace {
+constexpr char LOWER_XDIGITS[] = "0123456789abcdef";
+} // namespace
+
+namespace {
+template <typename OutputIterator>
+std::pair<OutputIterator, OutputIterator>
+copy_hex_low(const uint8_t *src, size_t srclen, OutputIterator d_first,
+ OutputIterator d_last) {
+ auto nwrite = std::min(static_cast<size_t>(std::distance(d_first, d_last)),
+ srclen * 2) /
+ 2;
+ for (size_t i = 0; i < nwrite; ++i) {
+ *d_first++ = LOWER_XDIGITS[src[i] >> 4];
+ *d_first++ = LOWER_XDIGITS[src[i] & 0xf];
+ }
+ return std::make_pair(d_first, d_last);
+}
+} // namespace
+
+namespace {
+template <typename OutputIterator, typename T>
+std::pair<OutputIterator, OutputIterator> copy(T n, OutputIterator d_first,
+ OutputIterator d_last) {
+ if (static_cast<size_t>(std::distance(d_first, d_last)) <
+ NGHTTP2_MAX_UINT64_DIGITS) {
+ return std::make_pair(d_last, d_last);
+ }
+ return std::make_pair(util::utos(d_first, n), d_last);
+}
+} // namespace
+
+namespace {
+// 1 means that character must be escaped as "\xNN", where NN is ascii
+// code of the character in hex notation.
+constexpr uint8_t ESCAPE_TBL[] = {
+ 1 /* NUL */, 1 /* SOH */, 1 /* STX */, 1 /* ETX */, 1 /* EOT */,
+ 1 /* ENQ */, 1 /* ACK */, 1 /* BEL */, 1 /* BS */, 1 /* HT */,
+ 1 /* LF */, 1 /* VT */, 1 /* FF */, 1 /* CR */, 1 /* SO */,
+ 1 /* SI */, 1 /* DLE */, 1 /* DC1 */, 1 /* DC2 */, 1 /* DC3 */,
+ 1 /* DC4 */, 1 /* NAK */, 1 /* SYN */, 1 /* ETB */, 1 /* CAN */,
+ 1 /* EM */, 1 /* SUB */, 1 /* ESC */, 1 /* FS */, 1 /* GS */,
+ 1 /* RS */, 1 /* US */, 0 /* SPC */, 0 /* ! */, 1 /* " */,
+ 0 /* # */, 0 /* $ */, 0 /* % */, 0 /* & */, 0 /* ' */,
+ 0 /* ( */, 0 /* ) */, 0 /* * */, 0 /* + */, 0 /* , */,
+ 0 /* - */, 0 /* . */, 0 /* / */, 0 /* 0 */, 0 /* 1 */,
+ 0 /* 2 */, 0 /* 3 */, 0 /* 4 */, 0 /* 5 */, 0 /* 6 */,
+ 0 /* 7 */, 0 /* 8 */, 0 /* 9 */, 0 /* : */, 0 /* ; */,
+ 0 /* < */, 0 /* = */, 0 /* > */, 0 /* ? */, 0 /* @ */,
+ 0 /* A */, 0 /* B */, 0 /* C */, 0 /* D */, 0 /* E */,
+ 0 /* F */, 0 /* G */, 0 /* H */, 0 /* I */, 0 /* J */,
+ 0 /* K */, 0 /* L */, 0 /* M */, 0 /* N */, 0 /* O */,
+ 0 /* P */, 0 /* Q */, 0 /* R */, 0 /* S */, 0 /* T */,
+ 0 /* U */, 0 /* V */, 0 /* W */, 0 /* X */, 0 /* Y */,
+ 0 /* Z */, 0 /* [ */, 1 /* \ */, 0 /* ] */, 0 /* ^ */,
+ 0 /* _ */, 0 /* ` */, 0 /* a */, 0 /* b */, 0 /* c */,
+ 0 /* d */, 0 /* e */, 0 /* f */, 0 /* g */, 0 /* h */,
+ 0 /* i */, 0 /* j */, 0 /* k */, 0 /* l */, 0 /* m */,
+ 0 /* n */, 0 /* o */, 0 /* p */, 0 /* q */, 0 /* r */,
+ 0 /* s */, 0 /* t */, 0 /* u */, 0 /* v */, 0 /* w */,
+ 0 /* x */, 0 /* y */, 0 /* z */, 0 /* { */, 0 /* | */,
+ 0 /* } */, 0 /* ~ */, 1 /* DEL */, 1 /* 0x80 */, 1 /* 0x81 */,
+ 1 /* 0x82 */, 1 /* 0x83 */, 1 /* 0x84 */, 1 /* 0x85 */, 1 /* 0x86 */,
+ 1 /* 0x87 */, 1 /* 0x88 */, 1 /* 0x89 */, 1 /* 0x8a */, 1 /* 0x8b */,
+ 1 /* 0x8c */, 1 /* 0x8d */, 1 /* 0x8e */, 1 /* 0x8f */, 1 /* 0x90 */,
+ 1 /* 0x91 */, 1 /* 0x92 */, 1 /* 0x93 */, 1 /* 0x94 */, 1 /* 0x95 */,
+ 1 /* 0x96 */, 1 /* 0x97 */, 1 /* 0x98 */, 1 /* 0x99 */, 1 /* 0x9a */,
+ 1 /* 0x9b */, 1 /* 0x9c */, 1 /* 0x9d */, 1 /* 0x9e */, 1 /* 0x9f */,
+ 1 /* 0xa0 */, 1 /* 0xa1 */, 1 /* 0xa2 */, 1 /* 0xa3 */, 1 /* 0xa4 */,
+ 1 /* 0xa5 */, 1 /* 0xa6 */, 1 /* 0xa7 */, 1 /* 0xa8 */, 1 /* 0xa9 */,
+ 1 /* 0xaa */, 1 /* 0xab */, 1 /* 0xac */, 1 /* 0xad */, 1 /* 0xae */,
+ 1 /* 0xaf */, 1 /* 0xb0 */, 1 /* 0xb1 */, 1 /* 0xb2 */, 1 /* 0xb3 */,
+ 1 /* 0xb4 */, 1 /* 0xb5 */, 1 /* 0xb6 */, 1 /* 0xb7 */, 1 /* 0xb8 */,
+ 1 /* 0xb9 */, 1 /* 0xba */, 1 /* 0xbb */, 1 /* 0xbc */, 1 /* 0xbd */,
+ 1 /* 0xbe */, 1 /* 0xbf */, 1 /* 0xc0 */, 1 /* 0xc1 */, 1 /* 0xc2 */,
+ 1 /* 0xc3 */, 1 /* 0xc4 */, 1 /* 0xc5 */, 1 /* 0xc6 */, 1 /* 0xc7 */,
+ 1 /* 0xc8 */, 1 /* 0xc9 */, 1 /* 0xca */, 1 /* 0xcb */, 1 /* 0xcc */,
+ 1 /* 0xcd */, 1 /* 0xce */, 1 /* 0xcf */, 1 /* 0xd0 */, 1 /* 0xd1 */,
+ 1 /* 0xd2 */, 1 /* 0xd3 */, 1 /* 0xd4 */, 1 /* 0xd5 */, 1 /* 0xd6 */,
+ 1 /* 0xd7 */, 1 /* 0xd8 */, 1 /* 0xd9 */, 1 /* 0xda */, 1 /* 0xdb */,
+ 1 /* 0xdc */, 1 /* 0xdd */, 1 /* 0xde */, 1 /* 0xdf */, 1 /* 0xe0 */,
+ 1 /* 0xe1 */, 1 /* 0xe2 */, 1 /* 0xe3 */, 1 /* 0xe4 */, 1 /* 0xe5 */,
+ 1 /* 0xe6 */, 1 /* 0xe7 */, 1 /* 0xe8 */, 1 /* 0xe9 */, 1 /* 0xea */,
+ 1 /* 0xeb */, 1 /* 0xec */, 1 /* 0xed */, 1 /* 0xee */, 1 /* 0xef */,
+ 1 /* 0xf0 */, 1 /* 0xf1 */, 1 /* 0xf2 */, 1 /* 0xf3 */, 1 /* 0xf4 */,
+ 1 /* 0xf5 */, 1 /* 0xf6 */, 1 /* 0xf7 */, 1 /* 0xf8 */, 1 /* 0xf9 */,
+ 1 /* 0xfa */, 1 /* 0xfb */, 1 /* 0xfc */, 1 /* 0xfd */, 1 /* 0xfe */,
+ 1 /* 0xff */,
+};
+} // namespace
+
+namespace {
+template <typename OutputIterator>
+std::pair<OutputIterator, OutputIterator>
+copy_escape(const char *src, size_t srclen, OutputIterator d_first,
+ OutputIterator d_last) {
+ auto safe_first = src;
+ for (auto p = src; p != src + srclen && d_first != d_last; ++p) {
+ unsigned char c = *p;
+ if (!ESCAPE_TBL[c]) {
+ continue;
+ }
+
+ auto n =
+ std::min(std::distance(d_first, d_last), std::distance(safe_first, p));
+ d_first = std::copy_n(safe_first, n, d_first);
+ if (std::distance(d_first, d_last) < 4) {
+ return std::make_pair(d_first, d_last);
+ }
+ *d_first++ = '\\';
+ *d_first++ = 'x';
+ *d_first++ = LOWER_XDIGITS[c >> 4];
+ *d_first++ = LOWER_XDIGITS[c & 0xf];
+ safe_first = p + 1;
+ }
+
+ auto n = std::min(std::distance(d_first, d_last),
+ std::distance(safe_first, src + srclen));
+ return std::make_pair(std::copy_n(safe_first, n, d_first), d_last);
+}
+} // namespace
+
+namespace {
+template <typename OutputIterator>
+std::pair<OutputIterator, OutputIterator> copy_escape(const StringRef &src,
+ OutputIterator d_first,
+ OutputIterator d_last) {
+ return copy_escape(src.c_str(), src.size(), d_first, d_last);
+}
+} // namespace
+
+namespace {
+// Construct absolute request URI from |Request|, mainly to log
+// request URI for proxy request (HTTP/2 proxy or client proxy). This
+// is mostly same routine found in
+// HttpDownstreamConnection::push_request_headers(), but vastly
+// simplified since we only care about absolute URI.
+StringRef construct_absolute_request_uri(BlockAllocator &balloc,
+ const Request &req) {
+ if (req.authority.empty()) {
+ return req.path;
+ }
+
+ auto len = req.authority.size() + req.path.size();
+ if (req.scheme.empty()) {
+ len += str_size("http://");
+ } else {
+ len += req.scheme.size() + str_size("://");
+ }
+
+ auto iov = make_byte_ref(balloc, len + 1);
+ auto p = iov.base;
+
+ if (req.scheme.empty()) {
+ // We may have to log the request which lacks scheme (e.g.,
+ // http/1.1 with origin form).
+ p = util::copy_lit(p, "http://");
+ } else {
+ p = std::copy(std::begin(req.scheme), std::end(req.scheme), p);
+ p = util::copy_lit(p, "://");
+ }
+ p = std::copy(std::begin(req.authority), std::end(req.authority), p);
+ p = std::copy(std::begin(req.path), std::end(req.path), p);
+ *p = '\0';
+
+ return StringRef{iov.base, p};
+}
+} // namespace
+
+void upstream_accesslog(const std::vector<LogFragment> &lfv,
+ const LogSpec &lgsp) {
+ auto config = get_config();
+ auto lgconf = log_config();
+ auto &accessconf = get_config()->logging.access;
+
+ if (lgconf->accesslog_fd == -1 && !accessconf.syslog) {
+ return;
+ }
+
+ std::array<char, 4_k> buf;
+
+ auto downstream = lgsp.downstream;
+
+ const auto &req = downstream->request();
+ const auto &resp = downstream->response();
+ const auto &tstamp = req.tstamp;
+ auto &balloc = downstream->get_block_allocator();
+
+ auto downstream_addr = downstream->get_addr();
+ auto method = req.method == -1 ? StringRef::from_lit("<unknown>")
+ : http2::to_method_string(req.method);
+ auto path =
+ req.method == HTTP_CONNECT ? req.authority
+ : config->http2_proxy ? construct_absolute_request_uri(balloc, req)
+ : req.path.empty() ? req.method == HTTP_OPTIONS ? StringRef::from_lit("*")
+ : StringRef::from_lit("-")
+ : req.path;
+ auto path_without_query =
+ req.method == HTTP_CONNECT
+ ? path
+ : StringRef{std::begin(path),
+ std::find(std::begin(path), std::end(path), '?')};
+
+ auto p = std::begin(buf);
+ auto last = std::end(buf) - 2;
+
+ for (auto &lf : lfv) {
+ switch (lf.type) {
+ case LogFragmentType::LITERAL:
+ std::tie(p, last) = copy(lf.value, p, last);
+ break;
+ case LogFragmentType::REMOTE_ADDR:
+ std::tie(p, last) = copy(lgsp.remote_addr, p, last);
+ break;
+ case LogFragmentType::TIME_LOCAL:
+ std::tie(p, last) = copy(tstamp->time_local, p, last);
+ break;
+ case LogFragmentType::TIME_ISO8601:
+ std::tie(p, last) = copy(tstamp->time_iso8601, p, last);
+ break;
+ case LogFragmentType::REQUEST:
+ std::tie(p, last) = copy(method, p, last);
+ std::tie(p, last) = copy(' ', p, last);
+ std::tie(p, last) = copy_escape(path, p, last);
+ std::tie(p, last) = copy_l(" HTTP/", p, last);
+ std::tie(p, last) = copy(req.http_major, p, last);
+ if (req.http_major < 2) {
+ std::tie(p, last) = copy('.', p, last);
+ std::tie(p, last) = copy(req.http_minor, p, last);
+ }
+ break;
+ case LogFragmentType::METHOD:
+ std::tie(p, last) = copy(method, p, last);
+ break;
+ case LogFragmentType::PATH:
+ std::tie(p, last) = copy_escape(path, p, last);
+ break;
+ case LogFragmentType::PATH_WITHOUT_QUERY:
+ std::tie(p, last) = copy_escape(path_without_query, p, last);
+ break;
+ case LogFragmentType::PROTOCOL_VERSION:
+ std::tie(p, last) = copy_l("HTTP/", p, last);
+ std::tie(p, last) = copy(req.http_major, p, last);
+ if (req.http_major < 2) {
+ std::tie(p, last) = copy('.', p, last);
+ std::tie(p, last) = copy(req.http_minor, p, last);
+ }
+ break;
+ case LogFragmentType::STATUS:
+ std::tie(p, last) = copy(resp.http_status, p, last);
+ break;
+ case LogFragmentType::BODY_BYTES_SENT:
+ std::tie(p, last) = copy(downstream->response_sent_body_length, p, last);
+ break;
+ case LogFragmentType::HTTP: {
+ auto hd = req.fs.header(lf.value);
+ if (hd) {
+ std::tie(p, last) = copy_escape((*hd).value, p, last);
+ break;
+ }
+
+ std::tie(p, last) = copy('-', p, last);
+
+ break;
+ }
+ case LogFragmentType::AUTHORITY:
+ if (!req.authority.empty()) {
+ std::tie(p, last) = copy(req.authority, p, last);
+ break;
+ }
+
+ std::tie(p, last) = copy('-', p, last);
+
+ break;
+ case LogFragmentType::REMOTE_PORT:
+ std::tie(p, last) = copy(lgsp.remote_port, p, last);
+ break;
+ case LogFragmentType::SERVER_PORT:
+ std::tie(p, last) = copy(lgsp.server_port, p, last);
+ break;
+ case LogFragmentType::REQUEST_TIME: {
+ auto t = std::chrono::duration_cast<std::chrono::milliseconds>(
+ lgsp.request_end_time - downstream->get_request_start_time())
+ .count();
+ std::tie(p, last) = copy(t / 1000, p, last);
+ std::tie(p, last) = copy('.', p, last);
+ auto frac = t % 1000;
+ if (frac < 100) {
+ auto n = frac < 10 ? 2 : 1;
+ std::tie(p, last) = copy("000", n, p, last);
+ }
+ std::tie(p, last) = copy(frac, p, last);
+ break;
+ }
+ case LogFragmentType::PID:
+ std::tie(p, last) = copy(lgsp.pid, p, last);
+ break;
+ case LogFragmentType::ALPN:
+ std::tie(p, last) = copy_escape(lgsp.alpn, p, last);
+ break;
+ case LogFragmentType::TLS_CIPHER:
+ if (!lgsp.ssl) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ std::tie(p, last) = copy(SSL_get_cipher_name(lgsp.ssl), p, last);
+ break;
+ case LogFragmentType::TLS_PROTOCOL:
+ if (!lgsp.ssl) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ std::tie(p, last) =
+ copy(nghttp2::tls::get_tls_protocol(lgsp.ssl), p, last);
+ break;
+ case LogFragmentType::TLS_SESSION_ID: {
+ auto session = SSL_get_session(lgsp.ssl);
+ if (!session) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ unsigned int session_id_length = 0;
+ auto session_id = SSL_SESSION_get_id(session, &session_id_length);
+ if (session_id_length == 0) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ std::tie(p, last) = copy_hex_low(session_id, session_id_length, p, last);
+ break;
+ }
+ case LogFragmentType::TLS_SESSION_REUSED:
+ if (!lgsp.ssl) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ std::tie(p, last) =
+ copy(SSL_session_reused(lgsp.ssl) ? 'r' : '.', p, last);
+ break;
+ case LogFragmentType::TLS_SNI:
+ if (lgsp.sni.empty()) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ std::tie(p, last) = copy_escape(lgsp.sni, p, last);
+ break;
+ case LogFragmentType::TLS_CLIENT_FINGERPRINT_SHA1:
+ case LogFragmentType::TLS_CLIENT_FINGERPRINT_SHA256: {
+ if (!lgsp.ssl) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+#if OPENSSL_3_0_0_API
+ auto x = SSL_get0_peer_certificate(lgsp.ssl);
+#else // !OPENSSL_3_0_0_API
+ auto x = SSL_get_peer_certificate(lgsp.ssl);
+#endif // !OPENSSL_3_0_0_API
+ if (!x) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ std::array<uint8_t, 32> buf;
+ auto len = tls::get_x509_fingerprint(
+ buf.data(), buf.size(), x,
+ lf.type == LogFragmentType::TLS_CLIENT_FINGERPRINT_SHA256
+ ? EVP_sha256()
+ : EVP_sha1());
+#if !OPENSSL_3_0_0_API
+ X509_free(x);
+#endif // !OPENSSL_3_0_0_API
+ if (len <= 0) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ std::tie(p, last) = copy_hex_low(buf.data(), len, p, last);
+ break;
+ }
+ case LogFragmentType::TLS_CLIENT_ISSUER_NAME:
+ case LogFragmentType::TLS_CLIENT_SUBJECT_NAME: {
+ if (!lgsp.ssl) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+#if OPENSSL_3_0_0_API
+ auto x = SSL_get0_peer_certificate(lgsp.ssl);
+#else // !OPENSSL_3_0_0_API
+ auto x = SSL_get_peer_certificate(lgsp.ssl);
+#endif // !OPENSSL_3_0_0_API
+ if (!x) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ auto name = lf.type == LogFragmentType::TLS_CLIENT_ISSUER_NAME
+ ? tls::get_x509_issuer_name(balloc, x)
+ : tls::get_x509_subject_name(balloc, x);
+#if !OPENSSL_3_0_0_API
+ X509_free(x);
+#endif // !OPENSSL_3_0_0_API
+ if (name.empty()) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ std::tie(p, last) = copy(name, p, last);
+ break;
+ }
+ case LogFragmentType::TLS_CLIENT_SERIAL: {
+ if (!lgsp.ssl) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+#if OPENSSL_3_0_0_API
+ auto x = SSL_get0_peer_certificate(lgsp.ssl);
+#else // !OPENSSL_3_0_0_API
+ auto x = SSL_get_peer_certificate(lgsp.ssl);
+#endif // !OPENSSL_3_0_0_API
+ if (!x) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ auto sn = tls::get_x509_serial(balloc, x);
+#if !OPENSSL_3_0_0_API
+ X509_free(x);
+#endif // !OPENSSL_3_0_0_API
+ if (sn.empty()) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ std::tie(p, last) = copy(sn, p, last);
+ break;
+ }
+ case LogFragmentType::BACKEND_HOST:
+ if (!downstream_addr) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ std::tie(p, last) = copy(downstream_addr->host, p, last);
+ break;
+ case LogFragmentType::BACKEND_PORT:
+ if (!downstream_addr) {
+ std::tie(p, last) = copy('-', p, last);
+ break;
+ }
+ std::tie(p, last) = copy(downstream_addr->port, p, last);
+ break;
+ case LogFragmentType::NONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ *p = '\0';
+
+ if (accessconf.syslog) {
+ syslog(LOG_INFO, "%s", buf.data());
+
+ return;
+ }
+
+ *p++ = '\n';
+
+ auto nwrite = std::distance(std::begin(buf), p);
+ while (write(lgconf->accesslog_fd, buf.data(), nwrite) == -1 &&
+ errno == EINTR)
+ ;
+}
+
+int reopen_log_files(const LoggingConfig &loggingconf) {
+ int res = 0;
+ int new_accesslog_fd = -1;
+ int new_errorlog_fd = -1;
+
+ auto lgconf = log_config();
+ auto &accessconf = loggingconf.access;
+ auto &errorconf = loggingconf.error;
+
+ if (!accessconf.syslog && !accessconf.file.empty()) {
+ new_accesslog_fd = open_log_file(accessconf.file.c_str());
+
+ if (new_accesslog_fd == -1) {
+ LOG(ERROR) << "Failed to open accesslog file " << accessconf.file;
+ res = -1;
+ }
+ }
+
+ if (!errorconf.syslog && !errorconf.file.empty()) {
+ new_errorlog_fd = open_log_file(errorconf.file.c_str());
+
+ if (new_errorlog_fd == -1) {
+ if (lgconf->errorlog_fd != -1) {
+ LOG(ERROR) << "Failed to open errorlog file " << errorconf.file;
+ } else {
+ std::cerr << "Failed to open errorlog file " << errorconf.file
+ << std::endl;
+ }
+
+ res = -1;
+ }
+ }
+
+ close_log_file(lgconf->accesslog_fd);
+ close_log_file(lgconf->errorlog_fd);
+
+ lgconf->accesslog_fd = new_accesslog_fd;
+ lgconf->errorlog_fd = new_errorlog_fd;
+ lgconf->errorlog_tty =
+ (new_errorlog_fd == -1) ? false : isatty(new_errorlog_fd);
+
+ return res;
+}
+
+void log_chld(pid_t pid, int rstatus, const char *msg) {
+ std::string signalstr;
+ if (WIFSIGNALED(rstatus)) {
+ signalstr += "; signal ";
+ auto sig = WTERMSIG(rstatus);
+ auto s = strsignal(sig);
+ if (s) {
+ signalstr += s;
+ signalstr += '(';
+ } else {
+ signalstr += "UNKNOWN(";
+ }
+ signalstr += util::utos(sig);
+ signalstr += ')';
+ }
+
+ LOG(NOTICE) << msg << ": [" << pid << "] exited "
+ << (WIFEXITED(rstatus) ? "normally" : "abnormally")
+ << " with status " << log::hex << rstatus << log::dec
+ << "; exit status "
+ << (WIFEXITED(rstatus) ? WEXITSTATUS(rstatus) : 0)
+ << (signalstr.empty() ? "" : signalstr.c_str());
+}
+
+void redirect_stderr_to_errorlog(const LoggingConfig &loggingconf) {
+ auto lgconf = log_config();
+ auto &errorconf = loggingconf.error;
+
+ if (errorconf.syslog || lgconf->errorlog_fd == -1) {
+ return;
+ }
+
+ dup2(lgconf->errorlog_fd, STDERR_FILENO);
+}
+
+namespace {
+int STDERR_COPY = -1;
+int STDOUT_COPY = -1;
+} // namespace
+
+void store_original_fds() {
+ // consider dup'ing stdout too
+ STDERR_COPY = dup(STDERR_FILENO);
+ STDOUT_COPY = STDOUT_FILENO;
+ // no race here, since it is called early
+ util::make_socket_closeonexec(STDERR_COPY);
+}
+
+void restore_original_fds() { dup2(STDERR_COPY, STDERR_FILENO); }
+
+void close_log_file(int &fd) {
+ if (fd != STDERR_COPY && fd != STDOUT_COPY && fd != -1) {
+ close(fd);
+ }
+ fd = -1;
+}
+
+int open_log_file(const char *path) {
+
+ if (strcmp(path, "/dev/stdout") == 0 ||
+ strcmp(path, "/proc/self/fd/1") == 0) {
+ return STDOUT_COPY;
+ }
+
+ if (strcmp(path, "/dev/stderr") == 0 ||
+ strcmp(path, "/proc/self/fd/2") == 0) {
+ return STDERR_COPY;
+ }
+#ifdef O_CLOEXEC
+
+ auto fd = open(path, O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC,
+ S_IRUSR | S_IWUSR | S_IRGRP);
+#else // !O_CLOEXEC
+
+ auto fd =
+ open(path, O_WRONLY | O_APPEND | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP);
+
+ // We get race condition if execve is called at the same time.
+ if (fd != -1) {
+ util::make_socket_closeonexec(fd);
+ }
+
+#endif // !O_CLOEXEC
+
+ if (fd == -1) {
+ return -1;
+ }
+
+ return fd;
+}
+
+} // namespace shrpx
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