initial commit
This commit is contained in:
Anselm R Garbe
commit
ce31aca1aa
6 changed files with 568 additions and 0 deletions
21
LICENSE
Normal file
21
LICENSE
Normal file
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@ -0,0 +1,21 @@
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|||
MIT/X Consortium License
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© 2009 Anselm R Garbe <anselm@garbe.us>
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Permission is hereby granted, free of charge, to any person obtaining a
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||||
copy of this software and associated documentation files (the "Software"),
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||||
to deal in the Software without restriction, including without limitation
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||||
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:
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||||
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||||
The above copyright notice and this permission notice shall be included in
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||||
all copies or substantial portions of the Software.
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||||
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||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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||||
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
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DEALINGS IN THE SOFTWARE.
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52
Makefile
Normal file
52
Makefile
Normal file
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@ -0,0 +1,52 @@
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# quark - simple httpd get daemon
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include config.mk
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SRC = quark.c
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OBJ = ${SRC:.c=.o}
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all: options quark
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options:
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@echo quark build options:
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@echo "CFLAGS = ${CFLAGS}"
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@echo "LDFLAGS = ${LDFLAGS}"
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@echo "CC = ${CC}"
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.c.o:
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@echo CC $<
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@${CC} -c ${CFLAGS} $<
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${OBJ}: config.mk
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quark: ${OBJ}
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@echo CC -o $@
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@${CC} -o $@ ${OBJ} ${LDFLAGS}
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@strip $@
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clean:
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@echo cleaning
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@rm -f quark ${OBJ} quark-${VERSION}.tar.gz
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dist: clean
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@echo creating dist tarball
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@mkdir -p quark-${VERSION}
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@cp -R LICENSE Makefile README config.mk ${SRC} quark-${VERSION}
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@tar -cf quark-${VERSION}.tar quark-${VERSION}
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@gzip quark-${VERSION}.tar
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@rm -rf quark-${VERSION}
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install: all
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@echo installing executable file to ${DESTDIR}${PREFIX}/bin
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@mkdir -p ${DESTDIR}${PREFIX}/bin
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@cp -f quark ${DESTDIR}${PREFIX}/bin
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@chmod 755 ${DESTDIR}${PREFIX}/bin/quark
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@echo installing manual page to ${DESTDIR}${MANPREFIX}/man1
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@mkdir -p ${DESTDIR}${MANPREFIX}/man1
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uninstall:
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@echo removing executable file from ${DESTDIR}${PREFIX}/bin
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@rm -f ${DESTDIR}${PREFIX}/bin/quark
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@echo removing manual page from ${DESTDIR}${MANPREFIX}/man1
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.PHONY: all options clean dist install uninstall
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19
README
Normal file
19
README
Normal file
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@ -0,0 +1,19 @@
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quark - simple http get server
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==============================
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quark is an extremly small and simple http get-only web server.
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Installation
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------------
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Edit config.mk to match your local setup. quark is installed into
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/usr/local/sbin by default.
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Afterwards enter the following command to build and install quark
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(if necessary as root):
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$ make clean install
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Running quark
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------------
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Simply invoke the quark <web-root> as superuser.
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23
config.h
Normal file
23
config.h
Normal file
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@ -0,0 +1,23 @@
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/* quark configuration */
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static const char servername[] = "127.0.0.1";
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static const char serverport[] = "80";
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static const char docroot[] = ".";
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static const char docindex[] = "index.html";
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static const char user[] = "www-data";
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static const char group[] = "www-data";
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static const MimeType servermimes[] = {
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{ "html", "text/html; charset=UTF-8" },
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{ "htm", "text/html; charset=UTF-8" },
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{ "css", "text/css" },
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{ "txt", "text/plain" },
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{ "text", "text/plain" },
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{ "png", "image/png" },
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{ "gif", "image/gif" },
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{ "jpg", "image/jpg" },
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{ "iso", "application/x-iso9660-image" },
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{ "gz", "application/x-gtar" },
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{ "pdf", "application/x-pdf" },
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{ "tar", "application/tar" },
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};
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21
config.mk
Normal file
21
config.mk
Normal file
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@ -0,0 +1,21 @@
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# quark version
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VERSION = 0.1
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# Customize below to fit your system
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# paths
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PREFIX = /usr/local
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MANPREFIX = ${PREFIX}/share/man
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# includes and libs
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INCS = -I. -I/usr/include
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LIBS = -L/usr/lib -lc
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# flags
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CPPFLAGS = -DVERSION=\"${VERSION}\" -D_GNU_SOURCE
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CFLAGS = -g -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS}
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LDFLAGS = ${LIBS}
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#LDFLAGS = -s ${LIBS}
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# compiler and linker
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CC = cc
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432
quark.c
Normal file
432
quark.c
Normal file
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@ -0,0 +1,432 @@
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/* See LICENSE file for license details. */
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/sendfile.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <time.h>
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#include <unistd.h>
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#define LENGTH(x) (sizeof x / sizeof x[0])
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#define MAXREQLEN 256
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typedef struct {
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const char *extension;
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const char *mimetype;
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} MimeType;
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static const char HttpOk[] = "200 OK";
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static const char HttpMoved[] = "302 Moved Permanently";
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static const char HttpUnauthorized[] = "401 Unauthorized";
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static const char HttpNotFound[] = "404 Not Found";
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static const char texthtml[] = "text/html";
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static ssize_t writedata(const char *buf);
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static void die(const char *errstr, ...);
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static void response(void);
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static void responsedir(void);
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static void responsedirdata(DIR *d);
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static void responsefile(void);
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static void responsefiledata(int fd, off_t size);
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static int request(void);
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static void serve(int fd);
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static void sighandler(int sig);
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static char *tstamp(void);
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#include "config.h"
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static char location[256];
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static int running = 1;
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static char name[128];
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static char reqbuf[MAXREQLEN];
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static char respbuf[1024];
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static int fd, cfd;
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ssize_t
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writedata(const char *buf) {
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ssize_t r, offset = 0;
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size_t len = strlen(buf);
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while(offset < len) {
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if((r = write(cfd, buf + offset, len - offset)) == -1) {
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fprintf(stderr, "%s: client %s closed connection\n", tstamp(), name);
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return -1;
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}
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offset += r;
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}
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return offset;
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}
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void
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logmsg(const char *errstr, ...) {
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va_list ap;
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fprintf(stdout, "%s: ", tstamp());
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va_start(ap, errstr);
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vfprintf(stdout, errstr, ap);
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va_end(ap);
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}
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void
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logerrmsg(const char *errstr, ...) {
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va_list ap;
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fprintf(stderr, "%s: ", tstamp());
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va_start(ap, errstr);
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vfprintf(stderr, errstr, ap);
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va_end(ap);
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}
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void
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die(const char *errstr, ...) {
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va_list ap;
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fprintf(stderr, "%s: ", tstamp());
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va_start(ap, errstr);
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vfprintf(stderr, errstr, ap);
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va_end(ap);
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exit(EXIT_FAILURE);
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}
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int
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responsehdr(const char *status) {
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if(snprintf(respbuf, sizeof respbuf,
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"HTTP/1.1 %s\r\n"
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"Connection: close\r\n"
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"Date: %s\r\n"
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"Server: quark-"VERSION"\r\n",
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status, tstamp()) >= sizeof respbuf)
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{
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logerrmsg("snprintf failed, buffer size exceeded");
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return -1;
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}
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return writedata(respbuf);
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}
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int
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responsecontentlen(off_t size) {
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if(snprintf(respbuf, sizeof respbuf,
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"Content-Length: %lu\r\n",
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size) >= sizeof respbuf)
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{
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logerrmsg("snprintf failed, buffer sizeof exceeded");
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return -1;
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}
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return writedata(respbuf);
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}
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int
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responselocation(const char *location, const char *pathinfo) {
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if(snprintf(respbuf, sizeof respbuf,
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"Location: %s%s\r\n",
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location, pathinfo) >= sizeof respbuf)
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{
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logerrmsg("snprintf failed, buffer sizeof exceeded");
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return -1;
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}
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return writedata(respbuf);
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}
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int
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responsecontenttype(const char *mimetype) {
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if(snprintf(respbuf, sizeof respbuf,
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"Content-Type: %s\r\n",
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mimetype) >= sizeof respbuf)
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{
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logerrmsg("snprintf failed, buffer sizeof exceeded");
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return -1;
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}
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return writedata(respbuf);
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}
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void
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responsefiledata(int fd, off_t size) {
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off_t offset = 0;
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while(offset < size)
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if(sendfile(cfd, fd, &offset, size - offset) == -1) {
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fprintf(stderr, "%s: sendfile failed on client %s: %s\n", tstamp(), name, strerror(errno));
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return;
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}
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}
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void
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responsefile(void) {
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const char *mimetype = "unknown";
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char *p;
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int i, ffd;
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struct stat st;
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stat(reqbuf, &st);
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if((ffd = open(reqbuf, O_RDONLY)) == -1) {
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fprintf(stderr, "%s: %s requests unknown path %s\n", tstamp(), name, reqbuf);
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if(responsehdr(HttpNotFound) != -1
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&& responsecontenttype(texthtml) != -1
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&& writedata("\r\n<html><body>404 Not Found</body></html>\r\n") != -1);
|
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}
|
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else {
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if((p = strrchr(reqbuf, '.'))) {
|
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p++;
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for(i = 0; i < LENGTH(servermimes); i++)
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if(!strcmp(servermimes[i].extension, p)) {
|
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mimetype = servermimes[i].mimetype;
|
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break;
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}
|
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}
|
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if(responsehdr(HttpOk) != -1
|
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&& responsecontentlen(st.st_size) != -1
|
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&& responsecontenttype(mimetype) != -1
|
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&& writedata("\r\n") != -1)
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responsefiledata(ffd, st.st_size);
|
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close(ffd);
|
||||
}
|
||||
}
|
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|
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void
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responsedirdata(DIR *d) {
|
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struct dirent *e;
|
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|
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if(responsehdr(HttpOk) != -1
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&& responsecontenttype(texthtml) != -1
|
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&& writedata("\r\n<html><body><a href='..'>..</a><br>\r\n") != -1);
|
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else
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return;
|
||||
while((e = readdir(d))) {
|
||||
if(e->d_name[0] == '.') /* ignore hidden files, ., .. */
|
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continue;
|
||||
if(snprintf(respbuf, sizeof respbuf, "<a href='%s%s'>%s</a><br>\r\n",
|
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reqbuf, e->d_name, e->d_name) >= sizeof respbuf)
|
||||
{
|
||||
logerrmsg("snprintf failed, buffer sizeof exceeded");
|
||||
return;
|
||||
}
|
||||
if(writedata(respbuf) == -1)
|
||||
return;
|
||||
}
|
||||
writedata("</body></html>\r\n");
|
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}
|
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|
||||
void
|
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responsedir(void) {
|
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ssize_t len = strlen(reqbuf);
|
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DIR *d;
|
||||
|
||||
if((reqbuf[len - 1] != '/') && (len + 1 < MAXREQLEN - 1)) {
|
||||
/* add directory terminator if necessary */
|
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reqbuf[len++] = '/';
|
||||
reqbuf[len] = 0;
|
||||
fprintf(stdout, "%s: redirecting %s to %s%s\n", tstamp(), name, location, reqbuf);
|
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if(responsehdr(HttpMoved) != -1
|
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&& responselocation(location, reqbuf) != -1
|
||||
&& responsecontenttype(texthtml) != -1
|
||||
&& writedata("\r\n<html><body>301 Moved Permanently</a></body></html>\r\n") != -1);
|
||||
return;
|
||||
}
|
||||
if(len + strlen(docindex) + 1 < MAXREQLEN - 1)
|
||||
memcpy(reqbuf + len, docindex, strlen(docindex) + 1);
|
||||
if(access(reqbuf, R_OK) == -1) { /* directory mode */
|
||||
reqbuf[len] = 0; /* cut off docindex again */
|
||||
if((d = opendir(reqbuf))) {
|
||||
responsedirdata(d);
|
||||
closedir(d);
|
||||
}
|
||||
}
|
||||
else
|
||||
responsefile(); /* docindex */
|
||||
|
||||
}
|
||||
|
||||
void
|
||||
response(void) {
|
||||
char *p;
|
||||
struct stat st;
|
||||
|
||||
for(p = reqbuf; *p; p++)
|
||||
if(*p == '\\' || (*p == '/' && *(p + 1) == '.')) { /* don't serve bogus or hidden files */
|
||||
fprintf(stderr, "%s: %s requests bogus or hidden file %s\n", tstamp(), name, reqbuf);
|
||||
if(responsehdr(HttpUnauthorized) != -1
|
||||
&& responsecontenttype(texthtml) != -1
|
||||
&& writedata("\r\n<html><body>401 Unauthorized</body></html>\r\n") != -1);
|
||||
return;
|
||||
}
|
||||
fprintf(stdout, "%s: %s requests: %s\n", tstamp(), name, reqbuf);
|
||||
stat(reqbuf, &st);
|
||||
if(S_ISDIR(st.st_mode))
|
||||
responsedir();
|
||||
else
|
||||
responsefile();
|
||||
}
|
||||
|
||||
int
|
||||
request(void) {
|
||||
char *p, *res;
|
||||
int r, ishead = 0;
|
||||
|
||||
if((r = read(cfd, reqbuf, (MAXREQLEN - 1))) < 0) {
|
||||
fprintf(stderr, "%s: read: %s\n", tstamp(), strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
for(p = reqbuf; p < reqbuf + MAXREQLEN && *p != '\r' && *p != '\n'; p++);
|
||||
if(*p == '\r' || *p == '\n') {
|
||||
*p = 0;
|
||||
/* parse command */
|
||||
if(strncmp(reqbuf, "GET ", 4)) {
|
||||
fprintf(stderr, "%s: %s performs unsupported request %s\n", tstamp(), name, reqbuf);
|
||||
return -1;
|
||||
}
|
||||
if(reqbuf[4] != '/') {
|
||||
fprintf(stderr, "%s: %s performs invalid request %s\n", tstamp(), name, reqbuf);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
/* determine path */
|
||||
for(res = reqbuf + 4; *res && *(res + 1) == '/'; res++);
|
||||
for(p = res; *p && *p != ' '; p++);
|
||||
*p = 0;
|
||||
memmove(reqbuf, res, (p - res) + 1);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void
|
||||
serve(int fd) {
|
||||
int result;
|
||||
socklen_t salen;
|
||||
struct sockaddr sa;
|
||||
|
||||
salen = sizeof sa;
|
||||
while(running) {
|
||||
if((cfd = accept(fd, &sa, &salen)) == -1)
|
||||
break;
|
||||
if(fork() == 0) {
|
||||
close(fd);
|
||||
name[0] = 0;
|
||||
getnameinfo(&sa, salen, name, sizeof name, NULL, 0, NI_NOFQDN);
|
||||
result = request();
|
||||
shutdown(cfd, SHUT_RD);
|
||||
if(result == 0)
|
||||
response();
|
||||
shutdown(cfd, SHUT_WR);
|
||||
close(cfd);
|
||||
exit(EXIT_SUCCESS);
|
||||
}
|
||||
}
|
||||
fprintf(stdout, "%s: shutting down\n", tstamp());
|
||||
}
|
||||
|
||||
void
|
||||
sighandler(int sig) {
|
||||
switch(sig) {
|
||||
default: break;
|
||||
case SIGHUP:
|
||||
case SIGINT:
|
||||
case SIGQUIT:
|
||||
case SIGABRT:
|
||||
case SIGTERM:
|
||||
close(fd);
|
||||
running = 0;
|
||||
break;
|
||||
case SIGCHLD:
|
||||
while(0 < waitpid(-1, NULL, WNOHANG));
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
char *
|
||||
tstamp(void) {
|
||||
static char res[25];
|
||||
time_t t = time(NULL);
|
||||
|
||||
memcpy(res, asctime(gmtime(&t)), 24);
|
||||
res[24] = 0;
|
||||
return res;
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char *argv[]) {
|
||||
struct addrinfo hints, *ai;
|
||||
struct passwd *upwd, *gpwd;
|
||||
int i;
|
||||
|
||||
/* arguments */
|
||||
for(i = 1; i < argc; i++)
|
||||
if(!strcmp(argv[i], "-v"))
|
||||
die("quark-"VERSION", © 2009 Anselm R Garbe\n");
|
||||
else
|
||||
die("usage: quark [-v]\n");
|
||||
|
||||
/* sanity checks */
|
||||
if(!(upwd = getpwnam(user)))
|
||||
die("error: invalid user %s\n", user);
|
||||
if(!(gpwd = getpwnam(group)))
|
||||
die("error: invalid group %s\n", group);
|
||||
|
||||
/* init */
|
||||
setbuf(stdout, NULL); /* unbuffered stdout */
|
||||
memset(&hints, 0, sizeof hints);
|
||||
hints.ai_family = AF_INET;
|
||||
hints.ai_socktype = SOCK_STREAM;
|
||||
hints.ai_flags = AI_PASSIVE;
|
||||
if((i = getaddrinfo(servername, serverport, &hints, &ai)))
|
||||
die("error: getaddrinfo: %s\n", gai_strerror(i));
|
||||
if((fd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol)) == -1) {
|
||||
freeaddrinfo(ai);
|
||||
die("error: socket: %s\n", strerror(errno));
|
||||
}
|
||||
if(bind(fd, ai->ai_addr, ai->ai_addrlen) == -1) {
|
||||
close(fd);
|
||||
freeaddrinfo(ai);
|
||||
die("error: bind: %s\n", strerror(errno));
|
||||
}
|
||||
if(listen(fd, SOMAXCONN) == -1) {
|
||||
close(fd);
|
||||
freeaddrinfo(ai);
|
||||
die("error: listen: %s\n", strerror(errno));
|
||||
}
|
||||
|
||||
if(!strcmp(serverport, "80"))
|
||||
i = snprintf(location, sizeof location, "http://%s", servername);
|
||||
else
|
||||
i = snprintf(location, sizeof location, "http://%s:%s", servername, serverport);
|
||||
if(i >= sizeof location) {
|
||||
close(fd);
|
||||
freeaddrinfo(ai);
|
||||
die("error: location too long\n");
|
||||
}
|
||||
|
||||
signal(SIGCHLD, sighandler);
|
||||
signal(SIGHUP, sighandler);
|
||||
signal(SIGINT, sighandler);
|
||||
signal(SIGQUIT, sighandler);
|
||||
signal(SIGABRT, sighandler);
|
||||
signal(SIGTERM, sighandler);
|
||||
signal(SIGKILL, sighandler);
|
||||
|
||||
if(chroot(docroot) == -1)
|
||||
die("error: chroot %s: %s\n", docroot, strerror(errno));
|
||||
|
||||
if(setgid(gpwd->pw_gid) == -1)
|
||||
die("error: cannot set group id\n");
|
||||
if(setuid(upwd->pw_uid) == -1)
|
||||
die("error: cannot set user id\n");
|
||||
|
||||
if(getuid() == 0)
|
||||
die("error: won't run with root permissions, choose another user\n");
|
||||
if(getgid() == 0)
|
||||
die("error: won't run with root permissions, choose another group\n");
|
||||
|
||||
fprintf(stdout, "%s: listening on %s:%s using %s as root directory\n", tstamp(), servername, serverport, docroot);
|
||||
|
||||
serve(fd); /* main loop */
|
||||
freeaddrinfo(ai);
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in a new issue