1 files changed, 153 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/lib/handler/access_log.c b/web/server/h2o/libh2o/lib/handler/access_log.c
new file mode 100644
index 00000000..4a770417
--- /dev/null
+++ b/web/server/h2o/libh2o/lib/handler/access_log.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2014-2016 DeNA Co., Ltd., Kazuho Oku
+ *
+ * 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 <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <spawn.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include "h2o.h"
+#include "h2o/serverutil.h"
+
+struct st_h2o_access_log_filehandle_t {
+    h2o_logconf_t *logconf;
+    int fd;
+};
+
+struct st_h2o_access_logger_t {
+    h2o_logger_t super;
+    h2o_access_log_filehandle_t *fh;
+};
+
+static void log_access(h2o_logger_t *_self, h2o_req_t *req)
+{
+    struct st_h2o_access_logger_t *self = (struct st_h2o_access_logger_t *)_self;
+    h2o_access_log_filehandle_t *fh = self->fh;
+    char *logline, buf[4096];
+    size_t len;
+
+    /* stringify */
+    len = sizeof(buf);
+    logline = h2o_log_request(fh->logconf, req, &len, buf);
+
+    /* emit */
+    write(fh->fd, logline, len);
+
+    /* free memory */
+    if (logline != buf)
+        free(logline);
+}
+
+static void on_dispose_handle(void *_fh)
+{
+    h2o_access_log_filehandle_t *fh = _fh;
+
+    h2o_logconf_dispose(fh->logconf);
+    close(fh->fd);
+}
+
+int h2o_access_log_open_log(const char *path)
+{
+    int fd;
+
+    if (path[0] == '|') {
+        int pipefds[2];
+        pid_t pid;
+        char *argv[4] = {"/bin/sh", "-c", (char *)(path + 1), NULL};
+        /* create pipe */
+        if (pipe(pipefds) != 0) {
+            perror("pipe failed");
+            return -1;
+        }
+        if (fcntl(pipefds[1], F_SETFD, FD_CLOEXEC) == -1) {
+            perror("failed to set FD_CLOEXEC on pipefds[1]");
+            return -1;
+        }
+        /* spawn the logger */
+        int mapped_fds[] = {pipefds[0], 0, /* map pipefds[0] to stdin */
+                            -1};
+        if ((pid = h2o_spawnp(argv[0], argv, mapped_fds, 0)) == -1) {
+            fprintf(stderr, "failed to open logger: %s:%s\n", path + 1, strerror(errno));
+            return -1;
+        }
+        /* close the read side of the pipefds and return the write side */
+        close(pipefds[0]);
+        fd = pipefds[1];
+    } else {
+        if ((fd = open(path, O_CREAT | O_WRONLY | O_APPEND | O_CLOEXEC, 0644)) == -1) {
+            fprintf(stderr, "failed to open log file:%s:%s\n", path, strerror(errno));
+            return -1;
+        }
+    }
+
+    return fd;
+}
+
+h2o_access_log_filehandle_t *h2o_access_log_open_handle(const char *path, const char *fmt, int escape)
+{
+    h2o_logconf_t *logconf;
+    int fd;
+    h2o_access_log_filehandle_t *fh;
+    char errbuf[256];
+
+    /* default to combined log format */
+    if (fmt == NULL)
+        fmt = "%h %l %u %t \"%r\" %s %b \"%{Referer}i\" \"%{User-agent}i\"";
+    if ((logconf = h2o_logconf_compile(fmt, escape, errbuf)) == NULL) {
+        fprintf(stderr, "%s\n", errbuf);
+        return NULL;
+    }
+
+    /* open log file */
+    if ((fd = h2o_access_log_open_log(path)) == -1) {
+        h2o_logconf_dispose(logconf);
+        return NULL;
+    }
+
+    fh = h2o_mem_alloc_shared(NULL, sizeof(*fh), on_dispose_handle);
+    fh->logconf = logconf;
+    fh->fd = fd;
+    return fh;
+}
+
+static void dispose(h2o_logger_t *_self)
+{
+    struct st_h2o_access_logger_t *self = (void *)_self;
+
+    h2o_mem_release_shared(self->fh);
+}
+
+h2o_logger_t *h2o_access_log_register(h2o_pathconf_t *pathconf, h2o_access_log_filehandle_t *fh)
+{
+    struct st_h2o_access_logger_t *self = (void *)h2o_create_logger(pathconf, sizeof(*self));
+
+    self->super.dispose = dispose;
+    self->super.log_access = log_access;
+    self->fh = fh;
+    h2o_mem_addref_shared(fh);
+
+    return &self->super;
+}