Init vger

This commit is contained in:
Solene Rapenne 2020-12-01 23:39:05 +01:00
commit c2d813c0f1
5 changed files with 248 additions and 0 deletions

10
Makefile Normal file
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all: vger
clean:
rm vger
vger: main.c
${CC} -o vger main.c
test: vger
cd tests && sh test.sh

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main.c Normal file
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/*
* Copyright (c) 2020 Solène Rapenne <solene@openbsd.org>
*
* MIT LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 <sys/stat.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <err.h>
#include <errno.h>
#define BUFF_LEN_1 1000
#define BUFF_LEN_2 1025
#define BUFF_LEN_3 1024
#define GEMINI_PART 9
#define DEFAULT_CHROOT "/var/gemini/"
void ok_status(void);
void err_status(void);
void display_file(char *);
int main(int, char **);
void
ok_status(void)
{
printf("20 text/gemini; lang=en\r\n");
}
void
err_status(void)
{
printf("40 text/gemini; lang=en\r\n");
}
void
display_file(char *path)
{
size_t buflen = BUFF_LEN_1;
char *buffer[BUFF_LEN_1];
ssize_t nread;
struct stat sb;
// this is to check if path is a directory
stat(path, &sb);
FILE *fd = fopen(path, "r");
if (fd != NULL && S_ISDIR(sb.st_mode) != 1) {
// check if directory
ok_status();
/* read the file and write it to stdout */
while ((nread = fread(buffer, sizeof(char), buflen, fd)) != 0)
fwrite(buffer, sizeof(char), nread, stdout);
fclose(fd);
} else {
err_status();
/*
* fprintf(stderr, "can't open %s %ld: %s\n", path,strlen(path),
* strerror(errno));
*/
}
}
int
main(int argc, char **argv)
{
char buffer[BUFF_LEN_2];
char request[BUFF_LEN_2];
char hostname[BUFF_LEN_2];
char file[BUFF_LEN_2];
char path[BUFF_LEN_2] = "";
int option;
char *pos;
while((option = getopt(argc, argv, ":d:")) != -1)
{
switch(option)
{
case 'd':
strlcpy(path, optarg, sizeof(path));
break;
}
}
if(strlen(path) == 0)
strlcpy(path, DEFAULT_CHROOT, sizeof(DEFAULT_CHROOT));
if (unveil(path, "r") == -1)
err(1, "unveil");
if (pledge("stdio rpath", NULL) == -1)
err(1, "pledge");
/*
* read 1024 chars from stdin
* to get the request
*/
fgets(request, BUFF_LEN_3, stdin);
/* remove \r\n at the end of string */
pos = strchr(request, '\r');
if(pos != NULL)
strlcpy(pos, "\0", 1);
/*
* check if the beginning of the request starts with
* gemini://
*/
int start_with_gemini = strncmp(request, "gemini://", 9);
/* the request must start with gemini:// */
if(start_with_gemini != 0) {
/* error code url malformed */
printf("request «%s» doesn't match gemini:// at index %i",
request, start_with_gemini);
exit(1);
}
/* remove the gemini:// part */
strlcpy(buffer, request + GEMINI_PART, sizeof(buffer) - GEMINI_PART);
strlcpy(request, buffer, sizeof(request));
/*
* look for the first / after the hostname
* in order to split hostname and uri
*/
pos = strchr(request, '/');
if (pos != NULL) {
/* if there is a / found */
int position = -1;
for (int i = 0; i < sizeof(request); i++) {
if (*pos == request[i]) {
position = i;
break;
}
}
/* separate hostname and uri */
if (position != -1) {
strlcpy(hostname, request, position);
strlcpy(file, request + position + 1, sizeof(request));
/* use a default file if no file are requested
* this can happen in two cases
* gemini://hostname/
* gemini://hostname/directory/
*/
if(strlen(file) == 0)
strlcpy(file, "/index.gmi", 11);
if(file[strlen(file)-1] == '/')
strlcat(file, "index.gmi", sizeof(file));
} else {
puts("error undefined");
exit(2);
}
} else {
/*
* there are no slash / in the request
* -2 to remove \r\n
*/
strlcpy(hostname, request, sizeof(hostname));
strlcpy(file, "/index.gmi", 11);
}
/* add the base dir to the file requested */
strlcat(path, file, sizeof(path));
/* open file and send it to stdout */
display_file(path);
return(0);
}

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#!/bin/sh
set -x
# serving a file
OUT=$(printf "gemini://host.name/main.gmi\r\n" | ../vger -d var/gemini/ | tee /dev/stderr | md5)
if ! [ $OUT = "d11e0c0ff074f5627f2d2af72fd07104" ] ; then echo "error" ; exit 1 ; fi
# default index.gmi file
OUT=$(printf "gemini://host.name\r\n" | ../vger -d var/gemini/ | tee /dev/stderr | md5)
if ! [ $OUT = "3edd48286850d386592403956aec770f" ] ; then echo "error" ; exit 1 ; fi
# default index.gmi file when using a trailing slash
OUT=$(printf "gemini://host.name/\r\n" | ../vger -d var/gemini/ | tee /dev/stderr | md5)
if ! [ $OUT = "3edd48286850d386592403956aec770f" ] ; then echo "error" ; exit 1 ; fi
# file from /var/gemini/index.md
OUT=$(printf "gemini://host.name/index.md\r\n" | ../vger | tee /dev/stderr | md5)
if ! [ $OUT = "bdbb22f0d1f4dd9e31bfc91686e7441d" ] ; then echo "error" ; exit 1 ; fi
#### no -d parameter from here
# file from /var/gemini/blog/
OUT=$(printf "gemini://host.name/blog/\r\n" | ../vger | tee /dev/stderr | md5)
if ! [ $OUT = "83bd01c9af0e44d5439b9ac95dc28132" ] ; then echo "error" ; exit 1 ; fi
# file from /var/gemini/blog
OUT=$(printf "gemini://host.name/blog\r\n" | ../vger | tee /dev/stderr | md5)
if ! [ $OUT = "f78c481e1614f1713e077b89aba5ab94" ] ; then echo "error" ; exit 1 ; fi

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this is
the INDEX
On multiples lines
with accents @^~#@¹#^¹~#@^¹\~{@^¹~@^{

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hello