Annotation of src/usr.bin/ftp/http.c, Revision 1.1
1.1 ! deraadt 1: /* $OpenBSD: main.c,v 1.5 1996/06/26 05:33:38 deraadt Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1996 Theo de Raadt
! 5: * Copyright (c) 1996 Brian Mitchell
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. The name of the author may not be used to endorse or promote products
! 16: * derived from this software without specific prior written permission.
! 17: *
! 18: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 19: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 20: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 21: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 22: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 23: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 24: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 25: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 26: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 27: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 28: */
! 29:
! 30: #include <sys/types.h>
! 31: #include <sys/file.h>
! 32: #include <sys/socket.h>
! 33: #include <netinet/in.h>
! 34:
! 35: #include <ctype.h>
! 36: #include <err.h>
! 37: #include <netdb.h>
! 38: #include <pwd.h>
! 39: #include <signal.h>
! 40: #include <stdio.h>
! 41: #include <stdlib.h>
! 42: #include <string.h>
! 43: #include <unistd.h>
! 44:
! 45: /*
! 46: * This function lets you retrieve files from the WWW. It will accept
! 47: * any http:// url. It conects and retrieves the file, saving it in
! 48: * the current directory.
! 49: *
! 50: * Limitations:
! 51: * http://host does not work, nor http://host/ - you have to specifically
! 52: * specify the filename you want to transfer.
! 53: */
! 54: int
! 55: http_fetch(url)
! 56: char *url;
! 57: {
! 58: char *hostname, *filename, basename[MAXPATHLEN] = "/";
! 59: char buf[8192], *bufp, *req = NULL;
! 60: struct sockaddr_in addr;
! 61: struct hostent *he;
! 62: FILE *write_to;
! 63: char *s, *p;
! 64: int bytes, c, d;
! 65: int sock = -1, file = -1, ret = 1;
! 66:
! 67: s = url + strlen("http://");
! 68: p = strchr(s, '/');
! 69: if (p)
! 70: *p = '\0';
! 71: else
! 72: p = s + strlen(s);
! 73: if (p - s > MAXHOSTNAMELEN-1) {
! 74: warn("hostname too long");
! 75: return (1);
! 76: }
! 77: hostname = s;
! 78: filename = p + 1;
! 79:
! 80: p = strrchr(filename, '/');
! 81: if (p == NULL) {
! 82: if (strlen(s) > MAXPATHLEN-1) {
! 83: warn("filename too long");
! 84: return (1);
! 85: }
! 86: strcpy(basename, filename);
! 87: } else {
! 88: p++;
! 89: if (strlen(p) > MAXPATHLEN-1) {
! 90: warn("filename too long");
! 91: return (1);
! 92: }
! 93: strcpy(basename, p);
! 94: }
! 95: if (strlen(basename) == 0)
! 96: strcpy(basename, "index.html");
! 97:
! 98: req = (char *)malloc(sizeof("GET ") + strlen(filename) +3);
! 99: if (!req) {
! 100: warn("no memory");
! 101: return (1);
! 102: }
! 103: sprintf(req, "GET /%s\n", filename);
! 104:
! 105: he = gethostbyname(hostname);
! 106: if (!he) {
! 107: perror("gethostbyname");
! 108: goto die;
! 109: }
! 110:
! 111: sock = socket(AF_INET, SOCK_STREAM, 0);
! 112: if (sock == -1) {
! 113: perror("socket");
! 114: goto die;
! 115: }
! 116:
! 117: memset(&addr, 0, sizeof addr);
! 118: addr.sin_family = he->h_addrtype;
! 119: addr.sin_port = htons(80);
! 120: memcpy(&addr.sin_addr, he->h_addr, he->h_length);
! 121:
! 122: if (connect(sock, (struct sockaddr *)&addr, sizeof addr) == -1) {
! 123: perror("connect");
! 124: goto die;
! 125: }
! 126: printf("Connected to %s.\n", hostname);
! 127:
! 128: printf("Retrieving using: %s", req);
! 129: for (bufp = req, c = strlen(bufp); c > 0; c -= d, bufp += d) {
! 130: if ((d = write(sock, bufp, c)) <= 0)
! 131: break;
! 132: }
! 133: if (d == -1) {
! 134: perror("sending command");
! 135: goto die;
! 136: }
! 137:
! 138: file = open(basename, O_CREAT|O_WRONLY|O_TRUNC, 0666);
! 139: if (!file) {
! 140: perror("fopen");
! 141: goto die;
! 142: }
! 143:
! 144: bytes = 0;
! 145: while ((c = read(sock, buf, sizeof (buf))) > 0) {
! 146: bytes += c;
! 147: for (bufp = buf; c > 0; c -= d, bufp += d)
! 148: if ((d = write(file, bufp, c)) <= 0)
! 149: break;
! 150: }
! 151: if (d == -1) {
! 152: perror("failed to receive correctly");
! 153: goto die;
! 154: }
! 155: printf("Success, closing connection.\n");
! 156: ret = 0;
! 157: die:
! 158: if (sock != -1)
! 159: close(sock);
! 160: if (file != -1)
! 161: close(file);
! 162: if (req)
! 163: free(req);
! 164: return (ret);
! 165: }
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