mirror of
https://github.com/moparisthebest/curl
synced 2024-11-17 23:15:08 -05:00
334 lines
6.6 KiB
C
334 lines
6.6 KiB
C
/* sws.c: simple (silly?) web server */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <signal.h>
|
|
#include <getopt.h>
|
|
#include <sys/time.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <netdb.h>
|
|
#include <assert.h>
|
|
|
|
#define DEFAULT_PORT 8999
|
|
|
|
#ifndef DEFAULT_LOGFILE
|
|
#define DEFAULT_LOGFILE "/dev/null"
|
|
#endif
|
|
|
|
#define DOCBUFSIZE 4
|
|
#define BUFFERSIZE (DOCBUFSIZE * 1024)
|
|
|
|
#define VERSION "cURL test suite HTTP server/0.1"
|
|
|
|
#define REQUEST_DUMP "http-request.dump"
|
|
|
|
#define TEST_DATA_PATH "../data/test%d"
|
|
|
|
static 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";
|
|
|
|
static volatile int sigpipe, sigterm;
|
|
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: pid %d: %s\n", loctime, getpid(), msg);
|
|
fprintf(stderr, "%s: pid %d: %s\n", loctime, getpid(), msg);
|
|
fflush(logfp);
|
|
}
|
|
|
|
|
|
static void sigpipe_handler(int sig)
|
|
{
|
|
sigpipe = 1;
|
|
}
|
|
|
|
|
|
static void sigterm_handler(int sig)
|
|
{
|
|
char logbuf[100];
|
|
snprintf(logbuf, 100, "Got signal %d, terminating", sig);
|
|
logmsg(logbuf);
|
|
sigterm = 1;
|
|
}
|
|
|
|
int ProcessRequest(char *request)
|
|
{
|
|
char *line=request;
|
|
long contentlength=-1;
|
|
|
|
#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);
|
|
|
|
line = strchr(line, '\n');
|
|
if(line)
|
|
line++;
|
|
} while(line);
|
|
|
|
if(contentlength > -1 ) {
|
|
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, "wb"); /* b is for windows-preparing */
|
|
if(dump) {
|
|
fwrite(reqbuf, 1, strlen(reqbuf), dump);
|
|
|
|
fclose(dump);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
#define REQBUFSIZ 4096
|
|
#define MAXDOCNAMELEN 1024
|
|
#define REQUEST_KEYWORD_SIZE 256
|
|
static int get_request(int sock)
|
|
{
|
|
char reqbuf[REQBUFSIZ], doc[MAXDOCNAMELEN];
|
|
char request[REQUEST_KEYWORD_SIZE];
|
|
unsigned int offset = 0;
|
|
int prot_major, prot_minor;
|
|
|
|
while (offset < REQBUFSIZ) {
|
|
int got = recv(sock, reqbuf + offset, REQBUFSIZ - offset, 0);
|
|
if (got <= 0) {
|
|
if (got < 0) {
|
|
perror("recv");
|
|
return -1;
|
|
}
|
|
logmsg("Connection closed by client");
|
|
return -1;
|
|
}
|
|
offset += got;
|
|
|
|
reqbuf[offset] = 0;
|
|
|
|
if(ProcessRequest(reqbuf))
|
|
break;
|
|
}
|
|
|
|
if (offset >= REQBUFSIZ) {
|
|
logmsg("Request buffer overflow, closing connection");
|
|
return -1;
|
|
}
|
|
reqbuf[offset]=0;
|
|
|
|
logmsg("Received a request");
|
|
|
|
/* dump the request to an external file */
|
|
storerequest(reqbuf);
|
|
|
|
if (sscanf(reqbuf, "%s %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) {
|
|
test_no = strtol(ptr+1, &ptr, 10);
|
|
|
|
logmsg("Found test number in PATH");
|
|
}
|
|
else
|
|
logmsg("Did not find test number in PATH");
|
|
|
|
return test_no;
|
|
}
|
|
|
|
logmsg("Got illegal request");
|
|
fprintf(stderr, "Got illegal request\n");
|
|
return -1;
|
|
}
|
|
|
|
|
|
static int send_doc(int sock, int doc)
|
|
{
|
|
int written;
|
|
int count;
|
|
char *buffer;
|
|
char *ptr;
|
|
FILE *stream;
|
|
|
|
char filename[256];
|
|
|
|
if(doc < 0) {
|
|
buffer = doc404;
|
|
ptr = NULL;
|
|
stream=NULL;
|
|
}
|
|
else {
|
|
sprintf(filename, TEST_DATA_PATH, doc);
|
|
|
|
stream=fopen(filename, "rb");
|
|
if(!stream) {
|
|
logmsg("Couldn't open test file");
|
|
return 0;
|
|
}
|
|
|
|
ptr = buffer = spitout(stream, "reply", "data", &count);
|
|
}
|
|
|
|
do {
|
|
written = send(sock, buffer, count, 0);
|
|
if (written < 0) {
|
|
fclose(stream);
|
|
return -1;
|
|
}
|
|
count -= written;
|
|
buffer += written;
|
|
} while(count>0);
|
|
|
|
if(ptr)
|
|
free(ptr);
|
|
if(stream)
|
|
fclose(stream);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
struct sockaddr_in me;
|
|
int sock, msgsock, flag;
|
|
unsigned short port = DEFAULT_PORT;
|
|
char *logfile = DEFAULT_LOGFILE;
|
|
|
|
if(argc>1)
|
|
port = atoi(argv[1]);
|
|
|
|
logfile = "logfile";
|
|
|
|
logfp = fopen(logfile, "a");
|
|
if (!logfp) {
|
|
perror(logfile);
|
|
exit(1);
|
|
}
|
|
|
|
signal(SIGPIPE, sigpipe_handler);
|
|
signal(SIGINT, sigterm_handler);
|
|
signal(SIGTERM, sigterm_handler);
|
|
|
|
siginterrupt(SIGPIPE, 1);
|
|
siginterrupt(SIGINT, 1);
|
|
siginterrupt(SIGTERM, 1);
|
|
|
|
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);
|
|
}
|
|
|
|
/* start accepting connections */
|
|
listen(sock, 5);
|
|
|
|
printf("*** %s listening on port %u ***\n", VERSION, port);
|
|
|
|
while (!sigterm) {
|
|
int doc;
|
|
|
|
msgsock = accept(sock, NULL, NULL);
|
|
|
|
if (msgsock == -1) {
|
|
if (sigterm) {
|
|
break;
|
|
}
|
|
/* perror("accept"); */
|
|
continue;
|
|
}
|
|
|
|
logmsg("New client connected");
|
|
|
|
doc = get_request(msgsock);
|
|
if (doc > 0)
|
|
send_doc(msgsock, doc);
|
|
else
|
|
send_doc(msgsock, -1);
|
|
|
|
close(msgsock);
|
|
}
|
|
|
|
close(sock);
|
|
fclose(logfp);
|
|
|
|
return 0;
|
|
}
|
|
|