extras/physfshttpd.c
changeset 206 b4663929d1ae
child 335 1d4720c018c3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/extras/physfshttpd.c	Mon Apr 22 05:25:58 2002 +0000
@@ -0,0 +1,290 @@
+/*
+ * 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).
+ */
+
+#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>
+
+#ifndef LACKING_SIGNALS
+#include <signal.h>
+#endif
+
+#ifndef LACKING_PROTOENT
+#include <netdb.h>
+#endif
+
+#include "physfs.h"
+
+
+#define DEFAULT_PORTNUM  6667
+
+typedef struct
+{
+    int sock;
+    struct sockaddr *addr;
+    socklen_t addrlen;
+} http_args;
+
+
+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";
+
+
+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 */
+
+            write(sock, buffer, (int) br);   /* !!! CHECK THIS RETVAL! */
+        } while (!PHYSFS_eof(in));
+
+        PHYSFS_close(in);
+    } /* else */
+} /* feed_file_http */
+
+
+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';
+
+    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';
+
+        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 */
+
+    /* !!! FIXME: Time the transfer. */
+    printf("%s: closing connection.\n", ipstr);
+    close(args->sock);
+    free(args->addr);
+    free(args);
+    return(NULL);
+} /* do_http */
+
+
+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
+
+    args->sock = sock;
+    args->addrlen = addrlen;
+    memcpy(args->addr, addr, addrlen);
+
+    /* !!! FIXME: optionally spin a thread... */
+    do_http((void *) args);
+} /* server_http_request */
+
+
+static int create_listen_socket(short portnum)
+{
+    int retval = -1;
+    int protocol = 0;  /* pray this is right. */
+
+#ifndef LACKING_PROTOENT
+    struct protoent *prot;
+    setprotoent(0);
+    prot = getprotobyname("tcp");
+    if (prot != NULL)
+        protocol = prot->p_proto;
+#endif
+
+    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 */
+
+    return(retval);
+} /* create_listen_socket */
+
+
+static int listensocket = -1;
+
+void at_exit_cleanup(void)
+{
+    /*
+     * !!! FIXME: If thread support, signal threads to terminate and
+     * !!! FIXME:  wait for them to clean up.
+     */
+
+    if (listensocket >= 0)
+        close(listensocket);
+
+    if (!PHYSFS_deinit())
+        printf("PHYSFS_deinit() failed: %s\n", PHYSFS_getLastError());
+} /* at_exit_cleanup */
+
+
+int main(int argc, char **argv)
+{
+    int i;
+    int portnum = DEFAULT_PORTNUM;
+
+    setbuf(stdout, NULL);
+    setbuf(stderr, NULL);
+
+#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
+
+    if (argc == 1)
+    {
+        printf("USAGE: %s <archive1> [archive2 [... archiveN]]\n", argv[0]);
+        return(42);
+    } /* if */
+
+    if (!PHYSFS_init(argv[0]))
+    {
+        printf("PHYSFS_init() failed: %s\n", PHYSFS_getLastError());
+        return(42);
+    } /* if */
+
+    /* normally, this is bad practice, but oh well. */
+    atexit(at_exit_cleanup);
+
+    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 */
+
+    listensocket = create_listen_socket(portnum);
+    if (listensocket < 0)
+    {
+        printf("listen socket failed to create.\n");
+        return(42);
+    } /* if */
+
+    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 */
+
+        serve_http_request(s, &addr, len);
+    } /* while */
+
+    return(0);
+} /* main */
+
+/* end of physfshttpd.c ... */
+