630 lines
12 KiB
C
630 lines
12 KiB
C
/* urlget.c Copyright 2000 by Michael Temari All Rights Reserved */
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/* 04/05/2000 Michael Temari <Michael@TemWare.Com> */
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/wait.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <unistd.h>
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#include <time.h>
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#include "net.h"
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_PROTOTYPE(char *unesc, (char *s));
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_PROTOTYPE(void encode64, (char **pp, char *s));
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_PROTOTYPE(char *auth, (char *user, char *pass));
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_PROTOTYPE(int skipit, (char *buf, int len, int *skip));
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_PROTOTYPE(int httpget, (char *host, int port, char *user, char *pass, char *path, int headers, int discard, int post));
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_PROTOTYPE(void ftppasv, (char *reply));
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_PROTOTYPE(int ftpreply, (FILE *fpr));
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_PROTOTYPE(int ftpcmd, (FILE *fpw, FILE *fpr, char *cmd, char *arg));
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_PROTOTYPE(int ftpget, (char *host, int port, char *user, char *pass, char *path, int type));
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_PROTOTYPE(int tcpget, (char *host, int port, char *user, char *pass, char *path));
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_PROTOTYPE(int main, (int argc, char *argv[]));
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char ftpphost[15+1];
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unsigned int ftppport;
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#define SCHEME_HTTP 1
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#define SCHEME_FTP 2
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#define SCHEME_TCP 3
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#define SCHEME_NNTP 4
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char buffer[16000];
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#if 0
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_PROTOTYPE(int strncasecmp, (const char *s1, const char *s2, size_t len));
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int
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strncasecmp(s1, s2, len)
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const char *s1, *s2;
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size_t len;
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{
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int c1, c2;
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do {
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if (len == 0)
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return 0;
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len--;
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} while (c1= toupper(*s1++), c2= toupper(*s2++), c1 == c2 && (c1 & c2))
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;
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if (c1 & c2)
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return c1 < c2 ? -1 : 1;
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return c1 ? 1 : (c2 ? -1 : 0);
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}
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#endif
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char *unesc(s)
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char *s;
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{
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char *p;
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char *p2;
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unsigned char c;
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p = s;
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p2 = s;
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while(*p) {
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if(*p != '%') {
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*p2++ = *p++;
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continue;
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}
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p++;
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if(*p == '%') {
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*p2++ = *p++;
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continue;
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}
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if(*p >= '0' && *p <= '9') c = *p++ - '0'; else
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if(*p >= 'a' && *p <= 'f') c = *p++ - 'a' + 10; else
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if(*p >= 'A' && *p <= 'F') c = *p++ - 'A' + 10; else
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break;
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if(*p >= '0' && *p <= '9') c = c << 4 | (*p++ - '0'); else
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if(*p >= 'a' && *p <= 'f') c = c << 4 | (*p++ - 'a') + 10; else
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if(*p >= 'A' && *p <= 'F') c = c << 4 | (*p++ - 'A') + 10; else
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break;
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*p2++ = c;
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}
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*p2 = '\0';
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return(s);
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}
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void encode64(pp, s)
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char **pp;
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char *s;
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{
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char *p;
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char c[3];
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int i;
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int len;
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static char e64[64] = {
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'A','B','C','D','E','F','G','H','I','J','K','L','M',
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'N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
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'a','b','c','d','e','f','g','h','i','j','k','l','m',
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'n','o','p','q','r','s','t','u','v','w','x','y','z',
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'0','1','2','3','4','5','6','7','8','9','+','/' };
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p = *pp;
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len = strlen(s);
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for(i=0; i < len; i += 3) {
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c[0] = *s++;
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c[1] = *s++;
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c[2] = *s++;
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*p++ = e64[ c[0] >> 2];
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*p++ = e64[((c[0] << 4) & 0x30) | ((c[1] >> 4) & 0x0f)];
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*p++ = e64[((c[1] << 2) & 0x3c) | ((c[2] >> 6) & 0x03)];
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*p++ = e64[ c[2] & 0x3f];
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}
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if(i == len+1)
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p[-1] = '=';
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else
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if(i == len+2) {
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p[-1] = '=';
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p[-2] = '=';
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}
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*p = '\0';
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*pp = p;
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return;
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}
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char *auth(user, pass)
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char *user;
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char *pass;
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{
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static char a[128];
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char up[128];
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char *p;
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strcpy(a, "BASIC ");
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p = a + 6;
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sprintf(up, "%s:%s", user, pass);
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encode64(&p, up);
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return(a);
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}
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int skipit(buf, len, skip)
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char *buf;
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int len;
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int *skip;
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{
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static int lf = 0;
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static int crlf = 0;
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char *p;
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p = buf;
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while(--len >= 0) {
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if((crlf == 0 || crlf == 2) && *p == '\r')
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crlf++;
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else
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if((crlf == 1 || crlf == 3) && *p == '\n')
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crlf++;
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else
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crlf = 0;
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if(*p == '\n')
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lf++;
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else
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lf = 0;
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if(crlf == 4 || lf == 2) {
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*skip = 0;
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return(len);
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}
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p++;
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}
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return(0);
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}
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int httpget(host, port, user, pass, path, headers, discard, post)
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char *host;
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int port;
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char *user;
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char *pass;
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char *path;
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int headers;
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int discard;
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int post;
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{
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int fd;
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int skip;
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int s;
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int s2;
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char *a;
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char *qs;
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int len;
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if(port == 0)
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port = 80;
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fd = connect(host, port);
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if(fd < 0) {
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fprintf(stderr, "httpget: Could not connect to %s:%d\n", host, port);
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return(-1);
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}
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if(post) {
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qs = strrchr(path, '?');
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if(qs != (char *)NULL) {
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*qs++ = '\0';
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len = strlen(qs);
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} else
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len = 0;
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}
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if(post && len > 0)
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write(fd, "POST ", 5);
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else
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write(fd, "GET ", 4);
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write(fd, path, strlen(path));
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write(fd, " HTTP/1.0\r\n", 11);
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write(fd, "User-Agent: urlget\r\n", 20);
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write(fd, "Connection: Close\r\n", 19);
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if(*user) {
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write(fd, "Authorization: ", 15);
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a = auth(user, pass);
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write(fd, a, strlen(a));
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write(fd, "\r\n", 2);
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}
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if(post && len > 0) {
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sprintf(buffer, "Content-Length: %u\r\n", len);
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write(fd, buffer, strlen(buffer));
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}
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write(fd, "Host: ", 6);
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write(fd, host, strlen(host));
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write(fd, "\r\n", 2);
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write(fd, "\r\n", 2);
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if(post && len > 0)
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write(fd, qs, len);
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skip = 1;
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while((s = read(fd, buffer, sizeof(buffer)-1)) > 0) {
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buffer[s] = '\0';
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if(skip) {
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static int firstline = 1;
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if(firstline) {
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static char linebuf[1000];
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int l = 0;
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int c, v1, v2, e;
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if(s >= sizeof(linebuf)-l)
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c = sizeof(linebuf)-1-l;
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else c = s;
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memcpy(linebuf+l, buffer, c);
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linebuf[l+c] = '\0';
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if(strchr(buffer, '\n') || strchr(buffer, '\r'))
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firstline = 0;
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if(sscanf(linebuf, "HTTP/%d.%d %d ", &v1, &v2, &e) == 3
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&& e != 200) {
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fprintf(stderr, "HTTP error %d\n", e);
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return -1;
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}
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}
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s2 = skipit(buffer, s, &skip);
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if(headers)
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write(1, buffer, s - s2);
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} else
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s2 = s;
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if(s2 && !discard)
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if(write(1, &buffer[s - s2], s2) != s2) {
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perror("write");
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return(-1);
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}
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}
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if(s < 0) {
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fprintf(stderr, "httpget: Read error\n");
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return(-1);
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}
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close(fd);
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return(0);
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}
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void ftppasv(reply)
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char *reply;
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{
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char *p;
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unsigned char n[6];
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int i;
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ftppport = 0;
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p = reply;
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while(*p && *p != '(') p++;
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if(!*p) return;
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p++;
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i = 0;
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while(1) {
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n[i++] = atoi(p);
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if(i == 6) break;
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p = strchr(p, ',');
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if(p == (char *)NULL) return;
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p++;
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}
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sprintf(ftpphost, "%d.%d.%d.%d", n[0], n[1], n[2], n[3]);
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ftppport = n[4] * 256 + n[5];
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return;
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}
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int ftpreply(fpr)
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FILE *fpr;
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{
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static char reply[256];
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int s;
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char code[4];
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int ft;
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do {
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ft = 1;
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do {
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if(fgets(reply, sizeof(reply), fpr) == (char *)NULL)
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return(-1);
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if(ft) {
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ft = 0;
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strncpy(code, reply, 3);
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code[3] = '\0';
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}
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} while(strncmp(reply, code, 3) || reply[3] == '-');
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s = atoi(code);
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} while(s < 200 && s != 125 && s != 150);
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if(s == 227) ftppasv(reply);
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return(s);
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}
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int ftpcmd(fpw, fpr, cmd, arg)
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FILE *fpw;
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FILE *fpr;
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char *cmd;
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char *arg;
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{
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fprintf(fpw, "%s%s%s\r\n", cmd, *arg ? " " : "", arg);
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fflush(fpw);
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return(ftpreply(fpr));
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}
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int ftpget(host, port, user, pass, path, type)
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char *host;
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int port;
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char *user;
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char *pass;
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char *path;
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int type;
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{
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int fd;
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int fd2;
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FILE *fpr;
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FILE *fpw;
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int s;
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int s2;
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char *p;
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char *p2;
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char typec[2];
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if(port == 0)
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port = 21;
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if(type == '\0')
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type = 'i';
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fd = connect(host, port);
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if(fd < 0) {
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fprintf(stderr, "ftpget: Could not connect to %s:%d\n", host, port);
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return(-1);
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}
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fpr = fdopen(fd, "r");
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fpw = fdopen(fd, "w");
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s = ftpreply(fpr);
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if(s / 100 != 2) goto error;
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s = ftpcmd(fpw, fpr, "USER", *user ? user : "ftp");
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if(s / 100 == 3)
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s = ftpcmd(fpw, fpr, "PASS", *pass ? pass : "urlget@");
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if(s / 100 != 2) goto error;
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p = path;
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if(*p == '/') p++;
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while((p2 = strchr(p, '/')) != (char *)NULL) {
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*p2++ = '\0';
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s = ftpcmd(fpw, fpr, "CWD", unesc(p));
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p = p2;
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}
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sprintf(typec, "%c", type == 'd' ? 'A' : type);
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s = ftpcmd(fpw, fpr, "TYPE", typec);
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if(s / 100 != 2) goto error;
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s = ftpcmd(fpw, fpr, "PASV", "");
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if(s != 227) goto error;
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fd2 = connect(ftpphost, ftppport);
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if(fd2 < 0) goto error;
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s = ftpcmd(fpw, fpr, type == 'd' ? "NLST" : "RETR", unesc(p));
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if(s / 100 != 1) goto error;
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while((s = read(fd2, buffer, sizeof(buffer))) > 0) {
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s2 = write(1, buffer, s);
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if(s2 != s) break;
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}
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if(s2 != s && s != 0) s = -1;
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close(fd2);
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s = ftpreply(fpr);
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if(s / 100 == 2) s = 0;
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error:
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(void) ftpcmd(fpw, fpr, "QUIT", "");
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fclose(fpr);
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fclose(fpw);
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close(fd);
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return(s == 0 ? 0 : -1);
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}
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int tcpget(host, port, user, pass, path)
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char *host;
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int port;
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char *user;
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char *pass;
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char *path;
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{
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int fd;
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int s;
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int s2;
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if(port == 0) {
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fprintf(stderr, "tcpget: No port specified\n");
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return(-1);
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}
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fd = connect(host, port);
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if(fd < 0) {
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fprintf(stderr, "httpget: Could not connect to %s:%d\n", host, port);
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return(-1);
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}
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if(*path == '\/')
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path++;
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write(fd, path, strlen(path));
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write(fd, "\n", 1);
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while((s = read(fd, buffer, sizeof(buffer))) > 0) {
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s2 = write(1, buffer, s);
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if(s2 != s) break;
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}
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close(fd);
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return(0);
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}
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int main(argc, argv)
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int argc;
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char *argv[];
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{
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char *prog;
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char *url;
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char scheme;
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char user[64];
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char pass[64];
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char host[64];
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int port;
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char *path;
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int type;
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char *ps;
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char *p;
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char *at;
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int s, c;
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int opt_h = 0;
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int opt_d = 0;
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int opt_p = 0;
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prog = strrchr(*argv, '/');
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if(prog == (char *)NULL)
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prog = *argv;
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argv++;
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argc--;
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while(argc && argv[0][0] == '-') {
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char *opt = *argv++ + 1;
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argc--;
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if (opt[0] == '-' && opt[1] == 0) break;
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while (*opt) switch (*opt++) {
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case 'h': opt_h = -1; break;
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case 'd': opt_d = -1; break;
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case 'p': opt_p = -1; break;
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default: argc = 0; break;
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}
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}
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if(strcmp(prog, "ftpget") == 0) {
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if(argc < 2 || argc > 4) {
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fprintf(stderr, "Usage: %s host path [user [pass]]\n", prog);
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return(-1);
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}
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strncpy(host, *argv++, sizeof(host));
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port = 21;
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path = *argv++;
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if(argc) {
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strncpy(user, *argv++, sizeof(user));
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argc++;
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} else
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*user = '\0';
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if(argc) {
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strncpy(pass, *argv++, sizeof(pass));
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argc++;
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} else
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*pass = '\0';
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s = ftpget(host, port, user, pass, path, 'i');
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return(s);
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}
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if(strcmp(prog, "httpget") == 0) {
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if(argc != 2) {
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fprintf(stderr, "Usage: %s [-h] [-d] [-p] host path\n", prog);
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return(-1);
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}
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strncpy(host, *argv++, sizeof(host));
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port = 80;
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path = *argv++;
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s = httpget(host, port, user, path, path, opt_h, opt_d, opt_p);
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return(s);
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}
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if(argc != 1) {
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usage:
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fprintf(stderr, "Usage: %s [-h] [-p] url\n", prog);
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return(-1);
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}
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url = *argv++;
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argc--;
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if(strncasecmp(url, "http://", 7) == 0) {
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scheme = SCHEME_HTTP;
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ps = url + 7;
|
|
} else
|
|
if(strncasecmp(url, "ftp://", 6) == 0) {
|
|
scheme = SCHEME_FTP;
|
|
ps = url + 6;
|
|
} else
|
|
if(strncasecmp(url, "tcp://", 6) == 0) {
|
|
scheme = SCHEME_TCP;
|
|
ps = url + 6;
|
|
} else {
|
|
fprintf(stderr, "%s: I do not handle this scheme\n", prog);
|
|
return(-1);
|
|
}
|
|
|
|
user[0] = '\0';
|
|
pass[0] = '\0';
|
|
host[0] = '\0';
|
|
port = 0;
|
|
|
|
p = ps;
|
|
while(*p && *p != '/') p++;
|
|
path = p;
|
|
c = *path;
|
|
*path = '\0';
|
|
|
|
at = strchr(ps, '@');
|
|
if(at != (char *)NULL) {
|
|
*at = '\0';
|
|
p = ps;
|
|
while(*p && *p != ':') p++;
|
|
if(*p)
|
|
*p++ = '\0';
|
|
strcpy(user, ps);
|
|
strcpy(pass, p);
|
|
ps = at + 1;
|
|
}
|
|
|
|
*path = c;
|
|
p = ps;
|
|
while(*p && *p != '/' && *p != ':') p++;
|
|
strncpy(host, ps, p - ps);
|
|
host[p - ps] = '\0';
|
|
if(*p == ':') {
|
|
p++;
|
|
ps = p;
|
|
while(*p && *p != '/')
|
|
port = port * 10 + (*p++ - '0');
|
|
}
|
|
if(*p == '/')
|
|
path = p;
|
|
else
|
|
path = "/";
|
|
if(scheme == SCHEME_FTP) {
|
|
p = path;
|
|
while(*p && *p != ';') p++;
|
|
if(*p) {
|
|
*p++ = '\0';
|
|
if(strncasecmp(p, "type=", 5) == 0) {
|
|
p += 5;
|
|
type = tolower(*p);
|
|
}
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
fprintf(stderr, "Host: %s\n", host);
|
|
fprintf(stderr, "Port: %d\n", port);
|
|
fprintf(stderr, "User: %s\n", user);
|
|
fprintf(stderr, "Pass: %s\n", pass);
|
|
fprintf(stderr, "Path: %s\n", path);
|
|
fprintf(stderr, "Type: %c\n", type);
|
|
#endif
|
|
|
|
switch(scheme) {
|
|
case SCHEME_HTTP:
|
|
s = httpget(host, port, user, pass, path, opt_h, opt_d, opt_p);
|
|
break;
|
|
case SCHEME_FTP:
|
|
s = ftpget(host, port, user, pass, path, type);
|
|
break;
|
|
case SCHEME_TCP:
|
|
s = tcpget(host, port, user, pass, path);
|
|
break;
|
|
}
|
|
|
|
return(s);
|
|
}
|