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/* | ||
* This is a quick and dirty HTTP server that uses PhysicsFS to retrieve | ||
* files. It is not robust at all, probably buggy, and definitely poorly | ||
* designed. It's just meant to show that it can be done. | ||
* | ||
* Basically, you compile this code, and run it: | ||
* ./physfshttpd archive1.zip archive2.zip /path/to/a/real/dir etc... | ||
* | ||
* The files are appended in order to the PhysicsFS search path, and when | ||
* a client request comes it, it looks for the file in said search path. | ||
* | ||
* My goal was to make this work in less than 300 lines of C, so again, it's | ||
* not to be used for any serious purpose. Patches to make this application | ||
* suck less will be readily and gratefully accepted. | ||
* | ||
* Command line I used to build this on Linux: | ||
* gcc -Wall -Werror -g -o bin/physfshttpd extras/physfshttpd.c -lphysfs | ||
* | ||
* License: this code is public domain. I make no warranty that it is useful, | ||
* correct, harmless, or environmentally safe. | ||
* | ||
* This particular file may be used however you like, including copying it | ||
* verbatim into a closed-source project, exploiting it commercially, and | ||
* removing any trace of my name from the source (although I hope you won't | ||
* do that). I welcome enhancements and corrections to this file, but I do | ||
* not require you to send me patches if you make changes. | ||
* | ||
* Unless otherwise stated, the rest of PhysicsFS falls under the GNU Lesser | ||
* General Public License: http://www.gnu.org/licenses/lgpl.txt | ||
* | ||
* This file was written by Ryan C. Gordon. (icculus@clutteredmind.org). | ||
*/ | ||
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#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <string.h> | ||
#include <unistd.h> | ||
#include <errno.h> | ||
#include <ctype.h> | ||
#include <sys/types.h> | ||
#include <sys/socket.h> | ||
#include <netinet/in.h> | ||
#include <arpa/inet.h> | ||
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#ifndef LACKING_SIGNALS | ||
#include <signal.h> | ||
#endif | ||
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#ifndef LACKING_PROTOENT | ||
#include <netdb.h> | ||
#endif | ||
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#include "physfs.h" | ||
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#define DEFAULT_PORTNUM 6667 | ||
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typedef struct | ||
{ | ||
int sock; | ||
struct sockaddr *addr; | ||
socklen_t addrlen; | ||
} http_args; | ||
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static char *txt404 = | ||
"HTTP/1.0 404 Not Found\n" | ||
"Connection: close\n" | ||
"Content-type: text/html\n" | ||
"\n" | ||
"<html><head><title>404 Not Found</title></head>\n" | ||
"<body>Can't find that.</body></html>\n\n"; | ||
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static void feed_file_http(const char *ipstr, int sock, const char *fname) | ||
{ | ||
PHYSFS_file *in = PHYSFS_openRead(fname); | ||
char buffer[1024]; | ||
printf("%s: requested [%s].\n", ipstr, fname); | ||
if (in == NULL) | ||
{ | ||
printf("%s: Can't open [%s]: %s.\n", | ||
ipstr, fname, PHYSFS_getLastError()); | ||
write(sock, txt404, strlen(txt404)); /* !!! Check retval */ | ||
} /* if */ | ||
else | ||
{ | ||
do | ||
{ | ||
PHYSFS_sint64 br = PHYSFS_read(in, buffer, 1, sizeof (buffer)); | ||
if (br == -1) | ||
{ | ||
printf("%s: Read error: %s.\n", ipstr, PHYSFS_getLastError()); | ||
break; | ||
} /* if */ | ||
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write(sock, buffer, (int) br); /* !!! CHECK THIS RETVAL! */ | ||
} while (!PHYSFS_eof(in)); | ||
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PHYSFS_close(in); | ||
} /* else */ | ||
} /* feed_file_http */ | ||
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static void *do_http(void *_args) | ||
{ | ||
http_args *args = (http_args *) _args; | ||
char ipstr[128]; | ||
char buffer[512]; | ||
char *ptr; | ||
strncpy(ipstr, inet_ntoa(((struct sockaddr_in *) args->addr)->sin_addr), | ||
sizeof (ipstr)); | ||
ipstr[sizeof (ipstr) - 1] = '\0'; | ||
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printf("%s: connected.\n", ipstr); | ||
read(args->sock, buffer, sizeof (buffer)); | ||
buffer[sizeof (buffer) - 1] = '\0'; | ||
ptr = strchr(buffer, '\n'); | ||
if (!ptr) | ||
printf("%s: potentially bogus request.\n", ipstr); | ||
else | ||
{ | ||
*ptr = '\0'; | ||
ptr = strchr(buffer, '\r'); | ||
if (ptr != NULL) | ||
*ptr = '\0'; | ||
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if ((toupper(buffer[0]) == 'G') && | ||
(toupper(buffer[1]) == 'E') && | ||
(toupper(buffer[2]) == 'T') && | ||
(toupper(buffer[3]) == ' ') && | ||
(toupper(buffer[4]) == '/')) | ||
{ | ||
ptr = strchr(buffer + 5, ' '); | ||
if (ptr != NULL) | ||
*ptr = '\0'; | ||
feed_file_http(ipstr, args->sock, buffer + 4); | ||
} /* if */ | ||
} /* else */ | ||
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/* !!! FIXME: Time the transfer. */ | ||
printf("%s: closing connection.\n", ipstr); | ||
close(args->sock); | ||
free(args->addr); | ||
free(args); | ||
return(NULL); | ||
} /* do_http */ | ||
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static void serve_http_request(int sock, struct sockaddr *addr, | ||
socklen_t addrlen) | ||
{ | ||
http_args *args = (http_args *) malloc(sizeof (http_args)); | ||
if (args == NULL) | ||
{ | ||
printf("out of memory.\n"); | ||
return; | ||
} // if | ||
args->addr = (struct sockaddr *) malloc(addrlen); | ||
if (args->addr == NULL) | ||
{ | ||
free(args); | ||
printf("out of memory.\n"); | ||
return; | ||
} // if | ||
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args->sock = sock; | ||
args->addrlen = addrlen; | ||
memcpy(args->addr, addr, addrlen); | ||
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/* !!! FIXME: optionally spin a thread... */ | ||
do_http((void *) args); | ||
} /* server_http_request */ | ||
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static int create_listen_socket(short portnum) | ||
{ | ||
int retval = -1; | ||
int protocol = 0; /* pray this is right. */ | ||
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#ifndef LACKING_PROTOENT | ||
struct protoent *prot; | ||
setprotoent(0); | ||
prot = getprotobyname("tcp"); | ||
if (prot != NULL) | ||
protocol = prot->p_proto; | ||
#endif | ||
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retval = socket(PF_INET, SOCK_STREAM, protocol); | ||
if (retval >= 0) | ||
{ | ||
struct sockaddr_in addr; | ||
addr.sin_family = AF_INET; | ||
addr.sin_port = htons(portnum); | ||
addr.sin_addr.s_addr = INADDR_ANY; | ||
if ((bind(retval, &addr, (socklen_t) sizeof (addr)) == -1) || | ||
(listen(retval, 5) == -1)) | ||
{ | ||
close(retval); | ||
retval = -1; | ||
} /* if */ | ||
} /* if */ | ||
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return(retval); | ||
} /* create_listen_socket */ | ||
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static int listensocket = -1; | ||
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void at_exit_cleanup(void) | ||
{ | ||
/* | ||
* !!! FIXME: If thread support, signal threads to terminate and | ||
* !!! FIXME: wait for them to clean up. | ||
*/ | ||
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if (listensocket >= 0) | ||
close(listensocket); | ||
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if (!PHYSFS_deinit()) | ||
printf("PHYSFS_deinit() failed: %s\n", PHYSFS_getLastError()); | ||
} /* at_exit_cleanup */ | ||
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int main(int argc, char **argv) | ||
{ | ||
int i; | ||
int portnum = DEFAULT_PORTNUM; | ||
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setbuf(stdout, NULL); | ||
setbuf(stderr, NULL); | ||
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#ifndef LACKING_SIGNALS | ||
/* I'm not sure if this qualifies as a cheap trick... */ | ||
signal(SIGTERM, exit); | ||
signal(SIGINT, exit); | ||
signal(SIGFPE, exit); | ||
signal(SIGSEGV, exit); | ||
signal(SIGPIPE, exit); | ||
signal(SIGILL, exit); | ||
#endif | ||
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if (argc == 1) | ||
{ | ||
printf("USAGE: %s <archive1> [archive2 [... archiveN]]\n", argv[0]); | ||
return(42); | ||
} /* if */ | ||
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if (!PHYSFS_init(argv[0])) | ||
{ | ||
printf("PHYSFS_init() failed: %s\n", PHYSFS_getLastError()); | ||
return(42); | ||
} /* if */ | ||
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/* normally, this is bad practice, but oh well. */ | ||
atexit(at_exit_cleanup); | ||
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for (i = 1; i < argc; i++) | ||
{ | ||
if (!PHYSFS_addToSearchPath(argv[i], 1)) | ||
printf(" WARNING: failed to add [%s] to search path.\n", argv[i]); | ||
} /* else */ | ||
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listensocket = create_listen_socket(portnum); | ||
if (listensocket < 0) | ||
{ | ||
printf("listen socket failed to create.\n"); | ||
return(42); | ||
} /* if */ | ||
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while (1) /* infinite loop for now. */ | ||
{ | ||
struct sockaddr addr; | ||
socklen_t len; | ||
int s = accept(listensocket, &addr, &len); | ||
if (s < 0) | ||
{ | ||
printf("accept() failed: %s\n", strerror(errno)); | ||
close(listensocket); | ||
return(42); | ||
} /* if */ | ||
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serve_http_request(s, &addr, len); | ||
} /* while */ | ||
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return(0); | ||
} /* main */ | ||
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/* end of physfshttpd.c ... */ | ||
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