intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 83 insertions, 0 deletions

diff --git a/library/cpp/http/misc/httpdate.cpp b/library/cpp/http/misc/httpdate.cpp
new file mode 100644
index 0000000000..4a3031bbf4
--- /dev/null
+++ b/library/cpp/http/misc/httpdate.cpp
@@ -0,0 +1,83 @@
+/*-
+* Copyright 1997 Massachusetts Institute of Technology
+*
+* Permission to use, copy, modify, and distribute this software and
+* its documentation for any purpose and without fee is hereby
+* granted, provided that both the above copyright notice and this
+* permission notice appear in all copies, that both the above
+* copyright notice and this permission notice appear in all
+* supporting documentation, and that the name of M.I.T. not be used
+* in advertising or publicity pertaining to distribution of the
+* software without specific, written prior permission.  M.I.T. makes
+* no representations about the suitability of this software for any
+* purpose.  It is provided "as is" without express or implied
+* warranty.
+*
+* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
+* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
+* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+* SUCH DAMAGE.
+*/
+#include <util/system/defaults.h>
+
+#include <sys/types.h>
+#include <cctype>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+
+#include <util/system/compat.h>   /* stricmp */
+#include <util/system/yassert.h>
+#include "httpdate.h"
+#include <util/datetime/base.h>
+
+static const char *wkdays[] = {
+    "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
+};
+
+static const char *months[] = {
+    "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct",
+    "Nov", "Dec"
+};
+
+int format_http_date(char buf[], size_t size, time_t when) {
+    struct tm tms;
+    GmTimeR(&when, &tms);
+
+#ifndef HTTP_DATE_ISO_8601
+    return snprintf(buf, size, "%s, %02d %s %04d %02d:%02d:%02d GMT",
+        wkdays[tms.tm_wday], tms.tm_mday, months[tms.tm_mon],
+        tms.tm_year + 1900, tms.tm_hour, tms.tm_min, tms.tm_sec);
+#else /* ISO 8601 */
+    return snprintf(buf, size, "%04d%02d%02dT%02d%02d%02d+0000",
+        tms.tm_year + 1900, tms.tm_mon + 1, tms.tm_mday,
+        tms.tm_hour, tms.tm_min, tms.tm_sec);
+#endif
+}
+
+char* format_http_date(time_t when, char* buf, size_t buflen) {
+    const int len = format_http_date(buf, buflen, when);
+
+    if (len == 0) {
+        return nullptr;
+    }
+
+    Y_ASSERT(len > 0 && size_t(len) < buflen);
+
+    return buf;
+}
+
+TString FormatHttpDate(time_t when) {
+    char str[64] = {0};
+    format_http_date(str, Y_ARRAY_SIZE(str), when);
+    return TString(str);
+}