📄 physfshttpd.c
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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). */#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 6667typedef 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 ... */⌨️ 快捷键说明
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