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|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2003, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/
/* sws.c: simple (silly?) web server
This code was originally graciously donated to the project by Juergen
Wilke. Thanks a bunch!
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
const char *
spitout(FILE *stream,
const char *main,
const char *sub, int *size);
#define DEFAULT_PORT 8999
#ifndef DEFAULT_LOGFILE
#define DEFAULT_LOGFILE "log/sws.log"
#endif
#define VERSION "cURL test suite HTTP server/0.1"
#define REQUEST_DUMP "log/server.input"
#define RESPONSE_DUMP "log/server.response"
#define TEST_DATA_PATH "data/test%d"
enum {
DOCNUMBER_BADCONNECT = -5,
DOCNUMBER_INTERNAL= -4,
DOCNUMBER_CONNECT = -3,
DOCNUMBER_WERULEZ = -2,
DOCNUMBER_404 = -1
};
/* sent as reply to a CONNECT */
static const char *docconnect =
"HTTP/1.1 200 Mighty fine indeed\r\n"
"\r\n";
/* sent as reply to a "bad" CONNECT */
static const char *docbadconnect =
"HTTP/1.1 501 Forbidden you fool\r\n"
"\r\n";
/* sent as reply to the magic to find out if we are the test server or
not */
static const char *docfriends = "HTTP/1.1 200 Mighty fine indeed\r\n\r\nWE ROOLZ\r\n";
/* send back this on 404 file not found */
static const char *doc404 = "HTTP/1.1 404 Not Found\n"
"Server: " VERSION "\n"
"Connection: close\n"
"Content-Type: text/html\n"
"\n"
"<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n"
"<HTML><HEAD>\n"
"<TITLE>404 Not Found</TITLE>\n"
"</HEAD><BODY>\n"
"<H1>Not Found</H1>\n"
"The requested URL was not found on this server.\n"
"<P><HR><ADDRESS>" VERSION "</ADDRESS>\n" "</BODY></HTML>\n";
#ifdef HAVE_SIGNAL
static volatile int sigpipe;
#endif
static FILE *logfp;
static void logmsg(const char *msg)
{
time_t t = time(NULL);
struct tm *curr_time = localtime(&t);
char loctime[80];
strcpy(loctime, asctime(curr_time));
loctime[strlen(loctime) - 1] = '\0';
fprintf(logfp, "%s: %d: %s\n", loctime, (int)getpid(), msg);
fflush(logfp);
}
#ifdef HAVE_SIGNAL
static void sigpipe_handler(int sig)
{
(void)sig; /* prevent warning */
sigpipe = 1;
}
#endif
int ProcessRequest(char *request)
{
char *line=request;
unsigned long contentlength=0;
char chunked=FALSE;
#define END_OF_HEADERS "\r\n\r\n"
char *end;
end = strstr(request, END_OF_HEADERS);
if(!end)
/* we don't have a complete request yet! */
return 0;
/* **** Persistancy ****
*
* If the request is a HTTP/1.0 one, we close the connection unconditionally
* when we're done.
*
* If the request is a HTTP/1.1 one, we MUST check for a "Connection:"
* header that might say "close". If it does, we close a connection when
* this request is processed. Otherwise, we keep the connection alive for X
* seconds.
*/
do {
if(!strncasecmp("Content-Length:", line, 15)) {
contentlength = strtol(line+15, &line, 10);
break;
}
else if(!strncasecmp("Transfer-Encoding: chunked", line,
strlen("Transfer-Encoding: chunked"))) {
/* chunked data coming in */
chunked = TRUE;
}
if(chunked) {
if(strstr(request, "\r\n0\r\n"))
/* end of chunks reached */
return 1; /* done */
else
return 0; /* not done */
}
line = strchr(line, '\n');
if(line)
line++;
} while(line);
if(contentlength > 0 ) {
if(contentlength <= strlen(end+strlen(END_OF_HEADERS)))
return 1; /* done */
else
return 0; /* not complete yet */
}
return 1; /* done */
}
/* store the entire request in a file */
void storerequest(char *reqbuf)
{
FILE *dump;
dump = fopen(REQUEST_DUMP, "ab"); /* b is for windows-preparing */
if(dump) {
fwrite(reqbuf, 1, strlen(reqbuf), dump);
fclose(dump);
}
}
#define REQBUFSIZ 150000
#define REQBUFSIZ_TXT "149999"
/* very-big-path support */
#define MAXDOCNAMELEN 140000
#define MAXDOCNAMELEN_TXT "139999"
#define REQUEST_KEYWORD_SIZE 256
static int get_request(int sock, int *part)
{
static char reqbuf[REQBUFSIZ], doc[MAXDOCNAMELEN];
static char request[REQUEST_KEYWORD_SIZE];
unsigned int offset = 0;
int prot_major, prot_minor;
char logbuf[256];
*part = 0; /* part zero equals none */
while (offset < REQBUFSIZ) {
int got = recv(sock, reqbuf + offset, REQBUFSIZ - offset, 0);
if (got <= 0) {
if (got < 0) {
perror("recv");
return DOCNUMBER_INTERNAL;
}
logmsg("Connection closed by client");
return DOCNUMBER_INTERNAL;
}
offset += got;
reqbuf[offset] = 0;
if(ProcessRequest(reqbuf))
break;
}
if (offset >= REQBUFSIZ) {
logmsg("Request buffer overflow, closing connection");
return DOCNUMBER_INTERNAL;
}
reqbuf[offset]=0;
/* dump the request to an external file */
storerequest(reqbuf);
if(sscanf(reqbuf, "%" REQBUFSIZ_TXT"s %" MAXDOCNAMELEN_TXT "s HTTP/%d.%d",
request,
doc,
&prot_major,
&prot_minor) == 4) {
char *ptr;
int test_no=0;
/* find the last slash */
ptr = strrchr(doc, '/');
/* get the number after it */
if(ptr) {
if((strlen(doc) + strlen(request)) < 200)
sprintf(logbuf, "Got request: %s %s HTTP/%d.%d",
request, doc, prot_major, prot_minor);
else
sprintf(logbuf, "Got a *HUGE* request HTTP/%d.%d",
prot_major, prot_minor);
logmsg(logbuf);
if(!strncmp("/verifiedserver", ptr, 15)) {
logmsg("Are-we-friendly question received");
return DOCNUMBER_WERULEZ;
}
ptr++; /* skip the slash */
test_no = strtol(ptr, &ptr, 10);
if(test_no > 10000) {
*part = test_no % 10000;
test_no /= 10000;
}
sprintf(logbuf, "Found test number %d in path", test_no);
logmsg(logbuf);
}
else {
if(sscanf(reqbuf, "CONNECT %" MAXDOCNAMELEN_TXT "s HTTP/%d.%d",
doc,
&prot_major, &prot_minor) == 3) {
sprintf(logbuf, "Receiced a CONNECT %s HTTP/%d.%d request",
doc, prot_major, prot_minor);
logmsg(logbuf);
if(!strncmp(doc, "bad", 3))
/* if the host name starts with bad, we fake an error here */
test_no = DOCNUMBER_BADCONNECT;
else
test_no = DOCNUMBER_CONNECT;
}
else {
logmsg("Did not find test number in PATH");
test_no = DOCNUMBER_404;
}
}
return test_no;
}
logmsg("Got illegal request");
fprintf(stderr, "Got illegal request\n");
return -1;
}
static int send_doc(int sock, int doc, int part_no)
{
int written;
int count;
const char *buffer;
char *ptr;
FILE *stream;
char *cmd=NULL;
int cmdsize=0;
FILE *dump;
char filename[256];
char partbuf[80]="data";
if(doc < 0) {
switch(doc) {
case DOCNUMBER_WERULEZ:
/* we got a "friends?" question, reply back that we sure are */
logmsg("Identifying ourselves as friends");
buffer = docfriends;
break;
case DOCNUMBER_INTERNAL:
logmsg("Bailing out due to internal error");
return -1;
case DOCNUMBER_CONNECT:
logmsg("Replying to CONNECT");
buffer = docconnect;
break;
case DOCNUMBER_BADCONNECT:
logmsg("Replying to a bad CONNECT");
buffer = docbadconnect;
break;
case DOCNUMBER_404:
default:
logmsg("Replying to with a 404");
buffer = doc404;
break;
}
ptr = NULL;
stream=NULL;
count = strlen(buffer);
}
else {
logmsg("Fetch response data");
if(0 != part_no)
sprintf(partbuf, "data%d", part_no);
sprintf(filename, TEST_DATA_PATH, doc);
stream=fopen(filename, "rb");
if(!stream) {
logmsg("Couldn't open test file");
return 0;
}
else {
buffer = spitout(stream, "reply", partbuf, &count);
ptr = (char *)buffer;
fclose(stream);
}
/* re-open the same file again */
stream=fopen(filename, "rb");
if(!stream) {
logmsg("Couldn't open test file");
return 0;
}
else {
/* get the custom server control "commands" */
cmd = (char *)spitout(stream, "reply", "postcmd", &cmdsize);
fclose(stream);
}
}
dump = fopen(RESPONSE_DUMP, "ab"); /* b is for windows-preparing */
if(!dump) {
logmsg("couldn't create logfile: " RESPONSE_DUMP);
return -1;
}
do {
written = send(sock, buffer, count, 0);
if (written < 0) {
logmsg("Sending response failed and we bailed out!");
return -1;
}
/* write to file as well */
fwrite(buffer, 1, written, dump);
count -= written;
buffer += written;
} while(count>0);
fclose(dump);
logmsg("Response sent!");
if(ptr)
free(ptr);
if(cmdsize > 0 ) {
char command[32];
int num;
char *ptr=cmd;
do {
if(2 == sscanf(ptr, "%31s %d", command, &num)) {
if(!strcmp("wait", command))
sleep(num); /* wait this many seconds */
else
logmsg("Unknown command in reply command section");
}
ptr = strchr(ptr, '\n');
if(ptr)
ptr++;
else
ptr = NULL;
} while(ptr && *ptr);
}
if(cmd)
free(cmd);
return 0;
}
int main(int argc, char *argv[])
{
struct sockaddr_in me;
int sock, msgsock, flag;
unsigned short port = DEFAULT_PORT;
const char *logfile = DEFAULT_LOGFILE;
int part_no;
FILE *pidfile;
if(argc>1)
port = atoi(argv[1]);
logfp = fopen(logfile, "a");
if (!logfp) {
perror(logfile);
exit(1);
}
#ifdef HAVE_SIGNAL
signal(SIGPIPE, sigpipe_handler);
siginterrupt(SIGPIPE, 1);
#endif
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0) {
perror("opening stream socket");
fprintf(logfp, "Error opening socket -- aborting\n");
fclose(logfp);
exit(1);
}
flag = 1;
if (setsockopt
(sock, SOL_SOCKET, SO_REUSEADDR, (const void *) &flag,
sizeof(int)) < 0) {
perror("setsockopt(SO_REUSEADDR)");
}
me.sin_family = AF_INET;
me.sin_addr.s_addr = INADDR_ANY;
me.sin_port = htons(port);
if (bind(sock, (struct sockaddr *) &me, sizeof me) < 0) {
perror("binding stream socket");
fprintf(logfp, "Error binding socket -- aborting\n");
fclose(logfp);
exit(1);
}
pidfile = fopen(".http.pid", "w");
if(pidfile) {
fprintf(pidfile, "%d\n", (int)getpid());
fclose(pidfile);
}
else
fprintf(stderr, "Couldn't write pid file\n");
/* start accepting connections */
listen(sock, 5);
fprintf(stderr, "*** %s listening on port %u ***\n", VERSION, port);
while (1) {
int doc;
msgsock = accept(sock, NULL, NULL);
if (msgsock == -1)
continue;
logmsg("New client connected");
do {
doc = get_request(msgsock, &part_no);
logmsg("Received request, now send response");
send_doc(msgsock, doc, part_no);
/* if we got a CONNECT, loop and get another request as well! */
} while(doc == DOCNUMBER_CONNECT);
logmsg("Closing client connection");
close(msgsock);
}
close(sock);
fclose(logfp);
return 0;
}
|
