Import evhttp from libevent 1.4.10

src/evhttp/evhttp.h

@@ -0,0 +1,371 @@
+/*
+ * Copyright (c) 2000-2004 Niels Provos <provos@citi.umich.edu>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR 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.
+ */
+#ifndef _EVHTTP_H_
+#define _EVHTTP_H_
+
+#include <event.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef WIN32
+#define WIN32_LEAN_AND_MEAN
+#include <winsock2.h>
+#include <windows.h>
+#undef WIN32_LEAN_AND_MEAN
+#endif
+
+/** @file evhttp.h
+ *
+ * Basic support for HTTP serving.
+ *
+ * As libevent is a library for dealing with event notification and most
+ * interesting applications are networked today, I have often found the
+ * need to write HTTP code.  The following prototypes and definitions provide
+ * an application with a minimal interface for making HTTP requests and for
+ * creating a very simple HTTP server.
+ */
+
+/* Response codes */
+#define HTTP_OK			200
+#define HTTP_NOCONTENT		204
+#define HTTP_MOVEPERM		301
+#define HTTP_MOVETEMP		302
+#define HTTP_NOTMODIFIED	304
+#define HTTP_BADREQUEST		400
+#define HTTP_NOTFOUND		404
+#define HTTP_SERVUNAVAIL	503
+
+struct evhttp;
+struct evhttp_request;
+struct evkeyvalq;
+
+/** Create a new HTTP server
+ *
+ * @param base (optional) the event base to receive the HTTP events
+ * @return a pointer to a newly initialized evhttp server structure
+ */
+struct evhttp *evhttp_new(struct event_base *base);
+
+/**
+ * Binds an HTTP server on the specified address and port.
+ *
+ * Can be called multiple times to bind the same http server
+ * to multiple different ports.
+ *
+ * @param http a pointer to an evhttp object
+ * @param address a string containing the IP address to listen(2) on
+ * @param port the port number to listen on
+ * @return a newly allocated evhttp struct
+ * @see evhttp_free()
+ */
+int evhttp_bind_socket(struct evhttp *http, const char *address, u_short port);
+
+/**
+ * Makes an HTTP server accept connections on the specified socket
+ *
+ * This may be useful to create a socket and then fork multiple instances
+ * of an http server, or when a socket has been communicated via file
+ * descriptor passing in situations where an http servers does not have
+ * permissions to bind to a low-numbered port.
+ *
+ * Can be called multiple times to have the http server listen to
+ * multiple different sockets.
+ *
+ * @param http a pointer to an evhttp object
+ * @param fd a socket fd that is ready for accepting connections
+ * @return 0 on success, -1 on failure.
+ * @see evhttp_free(), evhttp_bind_socket()
+ */
+int evhttp_accept_socket(struct evhttp *http, int fd);
+
+/**
+ * Free the previously created HTTP server.
+ *
+ * Works only if no requests are currently being served.
+ *
+ * @param http the evhttp server object to be freed
+ * @see evhttp_start()
+ */
+void evhttp_free(struct evhttp* http);
+
+/** Set a callback for a specified URI */
+void evhttp_set_cb(struct evhttp *, const char *,
+    void (*)(struct evhttp_request *, void *), void *);
+
+/** Removes the callback for a specified URI */
+int evhttp_del_cb(struct evhttp *, const char *);
+
+/** Set a callback for all requests that are not caught by specific callbacks
+ */
+void evhttp_set_gencb(struct evhttp *,
+    void (*)(struct evhttp_request *, void *), void *);
+
+/**
+ * Set the timeout for an HTTP request.
+ *
+ * @param http an evhttp object
+ * @param timeout_in_secs the timeout, in seconds
+ */
+void evhttp_set_timeout(struct evhttp *, int timeout_in_secs);
+
+/* Request/Response functionality */
+
+/**
+ * Send an HTML error message to the client.
+ *
+ * @param req a request object
+ * @param error the HTTP error code
+ * @param reason a brief explanation of the error
+ */
+void evhttp_send_error(struct evhttp_request *req, int error,
+    const char *reason);
+
+/**
+ * Send an HTML reply to the client.
+ *
+ * @param req a request object
+ * @param code the HTTP response code to send
+ * @param reason a brief message to send with the response code
+ * @param databuf the body of the response
+ */
+void evhttp_send_reply(struct evhttp_request *req, int code,
+    const char *reason, struct evbuffer *databuf);
+
+/* Low-level response interface, for streaming/chunked replies */
+void evhttp_send_reply_start(struct evhttp_request *, int, const char *);
+void evhttp_send_reply_chunk(struct evhttp_request *, struct evbuffer *);
+void evhttp_send_reply_end(struct evhttp_request *);
+
+/**
+ * Start an HTTP server on the specified address and port
+ *
+ * DEPRECATED: it does not allow an event base to be specified
+ *
+ * @param address the address to which the HTTP server should be bound
+ * @param port the port number on which the HTTP server should listen
+ * @return an struct evhttp object
+ */
+struct evhttp *evhttp_start(const char *address, u_short port);
+
+/*
+ * Interfaces for making requests
+ */
+enum evhttp_cmd_type { EVHTTP_REQ_GET, EVHTTP_REQ_POST, EVHTTP_REQ_HEAD };
+
+enum evhttp_request_kind { EVHTTP_REQUEST, EVHTTP_RESPONSE };
+
+/**
+ * the request structure that a server receives.
+ * WARNING: expect this structure to change.  I will try to provide
+ * reasonable accessors.
+ */
+struct evhttp_request {
+#if defined(TAILQ_ENTRY)
+	TAILQ_ENTRY(evhttp_request) next;
+#else
+struct {
+	struct evhttp_request *tqe_next;
+	struct evhttp_request **tqe_prev;
+}       next;
+#endif
+
+	/* the connection object that this request belongs to */
+	struct evhttp_connection *evcon;
+	int flags;
+#define EVHTTP_REQ_OWN_CONNECTION	0x0001
+#define EVHTTP_PROXY_REQUEST		0x0002
+
+	struct evkeyvalq *input_headers;
+	struct evkeyvalq *output_headers;
+
+	/* address of the remote host and the port connection came from */
+	char *remote_host;
+	u_short remote_port;
+
+	enum evhttp_request_kind kind;
+	enum evhttp_cmd_type type;
+
+	char *uri;			/* uri after HTTP request was parsed */
+
+	char major;			/* HTTP Major number */
+	char minor;			/* HTTP Minor number */
+
+	int response_code;		/* HTTP Response code */
+	char *response_code_line;	/* Readable response */
+
+	struct evbuffer *input_buffer;	/* read data */
+	ev_int64_t ntoread;
+	int chunked;
+
+	struct evbuffer *output_buffer;	/* outgoing post or data */
+
+	/* Callback */
+	void (*cb)(struct evhttp_request *, void *);
+	void *cb_arg;
+
+	/*
+	 * Chunked data callback - call for each completed chunk if
+	 * specified.  If not specified, all the data is delivered via
+	 * the regular callback.
+	 */
+	void (*chunk_cb)(struct evhttp_request *, void *);
+};
+
+/**
+ * Creates a new request object that needs to be filled in with the request
+ * parameters.  The callback is executed when the request completed or an
+ * error occurred.
+ */
+struct evhttp_request *evhttp_request_new(
+	void (*cb)(struct evhttp_request *, void *), void *arg);
+
+/** enable delivery of chunks to requestor */
+void evhttp_request_set_chunked_cb(struct evhttp_request *,
+    void (*cb)(struct evhttp_request *, void *));
+
+/** Frees the request object and removes associated events. */
+void evhttp_request_free(struct evhttp_request *req);
+
+/**
+ * A connection object that can be used to for making HTTP requests.  The
+ * connection object tries to establish the connection when it is given an
+ * http request object.
+ */
+struct evhttp_connection *evhttp_connection_new(
+	const char *address, unsigned short port);
+
+/** Frees an http connection */
+void evhttp_connection_free(struct evhttp_connection *evcon);
+
+/** sets the ip address from which http connections are made */
+void evhttp_connection_set_local_address(struct evhttp_connection *evcon,
+    const char *address);
+
+/** sets the local port from which http connections are made */
+void evhttp_connection_set_local_port(struct evhttp_connection *evcon,
+    unsigned short port);
+
+/** Sets the timeout for events related to this connection */
+void evhttp_connection_set_timeout(struct evhttp_connection *evcon,
+    int timeout_in_secs);
+
+/** Sets the retry limit for this connection - -1 repeats indefnitely */
+void evhttp_connection_set_retries(struct evhttp_connection *evcon,
+    int retry_max);
+
+/** Set a callback for connection close. */
+void evhttp_connection_set_closecb(struct evhttp_connection *evcon,
+    void (*)(struct evhttp_connection *, void *), void *);
+
+/**
+ * Associates an event base with the connection - can only be called
+ * on a freshly created connection object that has not been used yet.
+ */
+void evhttp_connection_set_base(struct evhttp_connection *evcon,
+    struct event_base *base);
+
+/** Get the remote address and port associated with this connection. */
+void evhttp_connection_get_peer(struct evhttp_connection *evcon,
+    char **address, u_short *port);
+
+/** The connection gets ownership of the request */
+int evhttp_make_request(struct evhttp_connection *evcon,
+    struct evhttp_request *req,
+    enum evhttp_cmd_type type, const char *uri);
+
+const char *evhttp_request_uri(struct evhttp_request *req);
+
+/* Interfaces for dealing with HTTP headers */
+
+const char *evhttp_find_header(const struct evkeyvalq *, const char *);
+int evhttp_remove_header(struct evkeyvalq *, const char *);
+int evhttp_add_header(struct evkeyvalq *, const char *, const char *);
+void evhttp_clear_headers(struct evkeyvalq *);
+
+/* Miscellaneous utility functions */
+
+
+/**
+  Helper function to encode a URI.
+
+  The returned string must be freed by the caller.
+
+  @param uri an unencoded URI
+  @return a newly allocated URI-encoded string
+ */
+char *evhttp_encode_uri(const char *uri);
+
+
+/**
+  Helper function to decode a URI.
+
+  The returned string must be freed by the caller.
+
+  @param uri an encoded URI
+  @return a newly allocated unencoded URI
+ */
+char *evhttp_decode_uri(const char *uri);
+
+
+/**
+ * Helper function to parse out arguments in a query.
+ *
+ * Parsing a uri like
+ *
+ *    http://foo.com/?q=test&s=some+thing
+ *
+ * will result in two entries in the key value queue.
+
+ * The first entry is: key="q", value="test"
+ * The second entry is: key="s", value="some thing"
+ *
+ * @param uri the request URI
+ * @param headers the head of the evkeyval queue
+ */
+void evhttp_parse_query(const char *uri, struct evkeyvalq *headers);
+
+
+/**
+ * Escape HTML character entities in a string.
+ *
+ * Replaces <, >, ", ' and & with &lt;, &gt;, &quot;,
+ * &#039; and &amp; correspondingly.
+ *
+ * The returned string needs to be freed by the caller.
+ *
+ * @param html an unescaped HTML string
+ * @return an escaped HTML string
+ */
+char *evhttp_htmlescape(const char *html);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _EVHTTP_H_ */

src/evhttp/http-internal.h

@@ -0,0 +1,154 @@
+/*
+ * Copyright 2001 Niels Provos <provos@citi.umich.edu>
+ * All rights reserved.
+ *
+ * This header file contains definitions for dealing with HTTP requests
+ * that are internal to libevent.  As user of the library, you should not
+ * need to know about these.
+ */
+
+#ifndef _HTTP_H_
+#define _HTTP_H_
+
+#define HTTP_CONNECT_TIMEOUT	45
+#define HTTP_WRITE_TIMEOUT	50
+#define HTTP_READ_TIMEOUT	50
+
+#define HTTP_PREFIX		"http://"
+#define HTTP_DEFAULTPORT	80
+
+enum message_read_status {
+	ALL_DATA_READ = 1,
+	MORE_DATA_EXPECTED = 0,
+	DATA_CORRUPTED = -1,
+	REQUEST_CANCELED = -2
+};
+
+enum evhttp_connection_error {
+	EVCON_HTTP_TIMEOUT,
+	EVCON_HTTP_EOF,
+	EVCON_HTTP_INVALID_HEADER
+};
+
+struct evbuffer;
+struct addrinfo;
+struct evhttp_request;
+
+/* A stupid connection object - maybe make this a bufferevent later */
+
+enum evhttp_connection_state {
+	EVCON_DISCONNECTED,	/**< not currently connected not trying either*/
+	EVCON_CONNECTING,	/**< tries to currently connect */
+	EVCON_IDLE,		/**< connection is established */
+	EVCON_READING_FIRSTLINE,/**< reading Request-Line (incoming conn) or
+				 **< Status-Line (outgoing conn) */
+	EVCON_READING_HEADERS,	/**< reading request/response headers */
+	EVCON_READING_BODY,	/**< reading request/response body */
+	EVCON_READING_TRAILER,	/**< reading request/response chunked trailer */
+	EVCON_WRITING		/**< writing request/response headers/body */
+};
+
+struct event_base;
+
+struct evhttp_connection {
+	/* we use tailq only if they were created for an http server */
+	TAILQ_ENTRY(evhttp_connection) (next);
+
+	int fd;
+	struct event ev;
+	struct event close_ev;
+	struct evbuffer *input_buffer;
+	struct evbuffer *output_buffer;
+	
+	char *bind_address;		/* address to use for binding the src */
+	u_short bind_port;		/* local port for binding the src */
+
+	char *address;			/* address to connect to */
+	u_short port;
+
+	int flags;
+#define EVHTTP_CON_INCOMING	0x0001	/* only one request on it ever */
+#define EVHTTP_CON_OUTGOING	0x0002  /* multiple requests possible */
+#define EVHTTP_CON_CLOSEDETECT  0x0004  /* detecting if persistent close */
+
+	int timeout;			/* timeout in seconds for events */
+	int retry_cnt;			/* retry count */
+	int retry_max;			/* maximum number of retries */
+	
+	enum evhttp_connection_state state;
+
+	/* for server connections, the http server they are connected with */
+	struct evhttp *http_server;
+
+	TAILQ_HEAD(evcon_requestq, evhttp_request) requests;
+	
+						   void (*cb)(struct evhttp_connection *, void *);
+	void *cb_arg;
+	
+	void (*closecb)(struct evhttp_connection *, void *);
+	void *closecb_arg;
+
+	struct event_base *base;
+};
+
+struct evhttp_cb {
+	TAILQ_ENTRY(evhttp_cb) next;
+
+	char *what;
+
+	void (*cb)(struct evhttp_request *req, void *);
+	void *cbarg;
+};
+
+/* both the http server as well as the rpc system need to queue connections */
+TAILQ_HEAD(evconq, evhttp_connection);
+
+/* each bound socket is stored in one of these */
+struct evhttp_bound_socket {
+	TAILQ_ENTRY(evhttp_bound_socket) (next);
+
+	struct event  bind_ev;
+};
+
+struct evhttp {
+	TAILQ_HEAD(boundq, evhttp_bound_socket) sockets;
+
+	TAILQ_HEAD(httpcbq, evhttp_cb) callbacks;
+        struct evconq connections;
+
+        int timeout;
+
+	void (*gencb)(struct evhttp_request *req, void *);
+	void *gencbarg;
+
+	struct event_base *base;
+};
+
+/* resets the connection; can be reused for more requests */
+void evhttp_connection_reset(struct evhttp_connection *);
+
+/* connects if necessary */
+int evhttp_connection_connect(struct evhttp_connection *);
+
+/* notifies the current request that it failed; resets connection */
+void evhttp_connection_fail(struct evhttp_connection *,
+    enum evhttp_connection_error error);
+
+void evhttp_get_request(struct evhttp *, int, struct sockaddr *, socklen_t);
+
+int evhttp_hostportfile(char *, char **, u_short *, char **);
+
+int evhttp_parse_firstline(struct evhttp_request *, struct evbuffer*);
+int evhttp_parse_headers(struct evhttp_request *, struct evbuffer*);
+
+void evhttp_start_read(struct evhttp_connection *);
+void evhttp_make_header(struct evhttp_connection *, struct evhttp_request *);
+
+void evhttp_write_buffer(struct evhttp_connection *,
+    void (*)(struct evhttp_connection *, void *), void *);
+
+/* response sending HTML the data in the buffer */
+void evhttp_response_code(struct evhttp_request *, int, const char *);
+void evhttp_send_page(struct evhttp_request *, struct evbuffer *);
+
+#endif /* _HTTP_H */

src/evhttp/log.c

@@ -0,0 +1,185 @@
+/*	$OpenBSD: err.c,v 1.2 2002/06/25 15:50:15 mickey Exp $	*/
+
+/*
+ * log.c
+ *
+ * Based on err.c, which was adapted from OpenBSD libc *err* *warn* code.
+ *
+ * Copyright (c) 2005 Nick Mathewson <nickm@freehaven.net>
+ *
+ * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
+ *
+ * Copyright (c) 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS 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 <event-config.h>
+
+#ifdef WIN32
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#undef WIN32_LEAN_AND_MEAN
+#endif
+#include <sys/types.h>
+#ifdef _EVENT_HAVE_SYS_TIME_H
+#include <sys/time.h>
+#else
+#include <sys/_time.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+#include "event.h"
+
+#include "log.h"
+#include <evutil.h>
+
+static void _warn_helper(int severity, int log_errno, const char *fmt,
+                         va_list ap);
+static void event_log(int severity, const char *msg);
+
+void
+event_err(int eval, const char *fmt, ...)
+{
+	va_list ap;
+	
+	va_start(ap, fmt);
+	_warn_helper(_EVENT_LOG_ERR, errno, fmt, ap);
+	va_end(ap);
+	exit(eval);
+}
+
+void
+event_warn(const char *fmt, ...)
+{
+	va_list ap;
+	
+	va_start(ap, fmt);
+	_warn_helper(_EVENT_LOG_WARN, errno, fmt, ap);
+	va_end(ap);
+}
+
+void
+event_errx(int eval, const char *fmt, ...)
+{
+	va_list ap;
+	
+	va_start(ap, fmt);
+	_warn_helper(_EVENT_LOG_ERR, -1, fmt, ap);
+	va_end(ap);
+	exit(eval);
+}
+
+void
+event_warnx(const char *fmt, ...)
+{
+	va_list ap;
+	
+	va_start(ap, fmt);
+	_warn_helper(_EVENT_LOG_WARN, -1, fmt, ap);
+	va_end(ap);
+}
+
+void
+event_msgx(const char *fmt, ...)
+{
+	va_list ap;
+	
+	va_start(ap, fmt);
+	_warn_helper(_EVENT_LOG_MSG, -1, fmt, ap);
+	va_end(ap);
+}
+
+void
+_event_debugx(const char *fmt, ...)
+{
+	va_list ap;
+	
+	va_start(ap, fmt);
+	_warn_helper(_EVENT_LOG_DEBUG, -1, fmt, ap);
+	va_end(ap);
+}
+
+static void
+_warn_helper(int severity, int log_errno, const char *fmt, va_list ap)
+{
+	char buf[1024];
+	size_t len;
+
+	if (fmt != NULL)
+		evutil_vsnprintf(buf, sizeof(buf), fmt, ap);
+	else
+		buf[0] = '\0';
+
+	if (log_errno >= 0) {
+		len = strlen(buf);
+		if (len < sizeof(buf) - 3) {
+			evutil_snprintf(buf + len, sizeof(buf) - len, ": %s",
+			    strerror(log_errno));
+		}
+	}
+
+	event_log(severity, buf);
+}
+
+static event_log_cb log_fn = NULL;
+
+void
+event_set_log_callback(event_log_cb cb)
+{
+	log_fn = cb;
+}
+
+static void
+event_log(int severity, const char *msg)
+{
+	if (log_fn)
+		log_fn(severity, msg);
+	else {
+		const char *severity_str;
+		switch (severity) {
+		case _EVENT_LOG_DEBUG:
+			severity_str = "debug";
+			break;
+		case _EVENT_LOG_MSG:
+			severity_str = "msg";
+			break;
+		case _EVENT_LOG_WARN:
+			severity_str = "warn";
+			break;
+		case _EVENT_LOG_ERR:
+			severity_str = "err";
+			break;
+		default:
+			severity_str = "???";
+			break;
+		}
+		(void)fprintf(stderr, "[%s] %s\n", severity_str, msg);
+	}
+}

src/evhttp/log.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2000-2004 Niels Provos <provos@citi.umich.edu>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR 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.
+ */
+#ifndef _LOG_H_
+#define _LOG_H_
+
+#ifdef __GNUC__
+#define EV_CHECK_FMT(a,b) __attribute__((format(printf, a, b)))
+#else
+#define EV_CHECK_FMT(a,b)
+#endif
+
+void event_err(int eval, const char *fmt, ...) EV_CHECK_FMT(2,3);
+void event_warn(const char *fmt, ...) EV_CHECK_FMT(1,2);
+void event_errx(int eval, const char *fmt, ...) EV_CHECK_FMT(2,3);
+void event_warnx(const char *fmt, ...) EV_CHECK_FMT(1,2);
+void event_msgx(const char *fmt, ...) EV_CHECK_FMT(1,2);
+void _event_debugx(const char *fmt, ...) EV_CHECK_FMT(1,2);
+
+#ifdef USE_DEBUG
+#define event_debug(x) _event_debugx x
+#else
+#define event_debug(x) do {;} while (0)
+#endif
+
+#undef EV_CHECK_FMT
+
+#endif

src/evhttp/strlcpy-internal.h

@@ -0,0 +1,21 @@
+#ifndef _STRLCPY_INTERNAL_H_
+#define _STRLCPY_INTERNAL_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event-config.h>
+
+#ifndef _EVENT_HAVE_STRLCPY
+#include <string.h>
+size_t _event_strlcpy(char *dst, const char *src, size_t siz);
+#define strlcpy _event_strlcpy
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+

src/evhttp/strlcpy.c

@@ -0,0 +1,74 @@
+/*	$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $	*/
+
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
+ * THE AUTHOR 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <event-config.h>
+
+#ifndef _EVENT_HAVE_STRLCPY
+#include "strlcpy-internal.h"
+
+/*
+ * Copy src to string dst of size siz.  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz == 0).
+ * Returns strlen(src); if retval >= siz, truncation occurred.
+ */
+size_t
+_event_strlcpy(dst, src, siz)
+	char *dst;
+	const char *src;
+	size_t siz;
+{
+	register char *d = dst;
+	register const char *s = src;
+	register size_t n = siz;
+
+	/* Copy as many bytes as will fit */
+	if (n != 0 && --n != 0) {
+		do {
+			if ((*d++ = *s++) == 0)
+				break;
+		} while (--n != 0);
+	}
+
+	/* Not enough room in dst, add NUL and traverse rest of src */
+	if (n == 0) {
+		if (siz != 0)
+			*d = '\0';		/* NUL-terminate dst */
+		while (*s++)
+			;
+	}
+
+	return(s - src - 1);	/* count does not include NUL */
+}
+#endif