1 | /* urlget.c Copyright 2000 by Michael Temari All Rights Reserved */
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2 | /* 04/05/2000 Michael Temari <Michael@TemWare.Com> */
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3 |
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4 | #include <sys/types.h>
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5 | #include <sys/ioctl.h>
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6 | #include <sys/wait.h>
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7 | #include <stdio.h>
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8 | #include <ctype.h>
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9 | #include <stdlib.h>
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10 | #include <string.h>
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11 | #include <errno.h>
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12 | #include <fcntl.h>
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13 | #include <signal.h>
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14 | #include <unistd.h>
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15 | #include <time.h>
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16 |
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17 | #include "net.h"
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18 |
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19 | _PROTOTYPE(char *unesc, (char *s));
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20 | _PROTOTYPE(void encode64, (char **pp, char *s));
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21 | _PROTOTYPE(char *auth, (char *user, char *pass));
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22 | _PROTOTYPE(int skipit, (char *buf, int len, int *skip));
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23 | _PROTOTYPE(int httpget, (char *host, int port, char *user, char *pass, char *path, int headers, int discard, int post));
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24 | _PROTOTYPE(void ftppasv, (char *reply));
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25 | _PROTOTYPE(int ftpreply, (FILE *fpr));
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26 | _PROTOTYPE(int ftpcmd, (FILE *fpw, FILE *fpr, char *cmd, char *arg));
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27 | _PROTOTYPE(int ftpget, (char *host, int port, char *user, char *pass, char *path, int type));
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28 | _PROTOTYPE(int tcpget, (char *host, int port, char *user, char *pass, char *path));
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29 | _PROTOTYPE(int main, (int argc, char *argv[]));
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30 |
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31 | char ftpphost[15+1];
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32 | unsigned int ftppport;
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33 |
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34 | #define SCHEME_HTTP 1
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35 | #define SCHEME_FTP 2
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36 | #define SCHEME_TCP 3
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37 | #define SCHEME_NNTP 4
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38 |
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39 | char buffer[16000];
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40 |
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41 | #if 0
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42 | _PROTOTYPE(int strncasecmp, (const char *s1, const char *s2, size_t len));
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43 | int
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44 | strncasecmp(s1, s2, len)
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45 | const char *s1, *s2;
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46 | size_t len;
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47 | {
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48 | int c1, c2;
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49 | do {
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50 | if (len == 0)
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51 | return 0;
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52 | len--;
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53 | } while (c1= toupper(*s1++), c2= toupper(*s2++), c1 == c2 && (c1 & c2))
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54 | ;
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55 | if (c1 & c2)
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56 | return c1 < c2 ? -1 : 1;
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57 | return c1 ? 1 : (c2 ? -1 : 0);
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58 | }
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59 | #endif
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60 |
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61 | char *unesc(s)
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62 | char *s;
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63 | {
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64 | char *p;
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65 | char *p2;
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66 | unsigned char c;
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67 |
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68 | p = s;
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69 | p2 = s;
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70 | while(*p) {
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71 | if(*p != '%') {
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72 | *p2++ = *p++;
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73 | continue;
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74 | }
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75 | p++;
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76 | if(*p == '%') {
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77 | *p2++ = *p++;
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78 | continue;
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79 | }
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80 | if(*p >= '0' && *p <= '9') c = *p++ - '0'; else
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81 | if(*p >= 'a' && *p <= 'f') c = *p++ - 'a' + 10; else
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82 | if(*p >= 'A' && *p <= 'F') c = *p++ - 'A' + 10; else
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83 | break;
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84 | if(*p >= '0' && *p <= '9') c = c << 4 | (*p++ - '0'); else
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85 | if(*p >= 'a' && *p <= 'f') c = c << 4 | (*p++ - 'a') + 10; else
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86 | if(*p >= 'A' && *p <= 'F') c = c << 4 | (*p++ - 'A') + 10; else
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87 | break;
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88 | *p2++ = c;
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89 | }
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90 | *p2 = '\0';
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91 | return(s);
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92 | }
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93 |
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94 | void encode64(pp, s)
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95 | char **pp;
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96 | char *s;
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97 | {
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98 | char *p;
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99 | char c[3];
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100 | int i;
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101 | int len;
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102 | static char e64[64] = {
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103 | 'A','B','C','D','E','F','G','H','I','J','K','L','M',
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104 | 'N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
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105 | 'a','b','c','d','e','f','g','h','i','j','k','l','m',
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106 | 'n','o','p','q','r','s','t','u','v','w','x','y','z',
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107 | '0','1','2','3','4','5','6','7','8','9','+','/' };
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108 |
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109 | p = *pp;
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110 | len = strlen(s);
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111 | for(i=0; i < len; i += 3) {
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112 | c[0] = *s++;
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113 | c[1] = *s++;
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114 | c[2] = *s++;
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115 | *p++ = e64[ c[0] >> 2];
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116 | *p++ = e64[((c[0] << 4) & 0x30) | ((c[1] >> 4) & 0x0f)];
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117 | *p++ = e64[((c[1] << 2) & 0x3c) | ((c[2] >> 6) & 0x03)];
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118 | *p++ = e64[ c[2] & 0x3f];
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119 | }
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120 | if(i == len+1)
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121 | p[-1] = '=';
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122 | else
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123 | if(i == len+2) {
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124 | p[-1] = '=';
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125 | p[-2] = '=';
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126 | }
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127 | *p = '\0';
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128 | *pp = p;
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129 | return;
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130 | }
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131 |
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132 | char *auth(user, pass)
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133 | char *user;
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134 | char *pass;
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135 | {
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136 | static char a[128];
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137 | char up[128];
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138 | char *p;
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139 |
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140 | strcpy(a, "BASIC ");
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141 | p = a + 6;
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142 | sprintf(up, "%s:%s", user, pass);
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143 | encode64(&p, up);
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144 |
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145 | return(a);
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146 | }
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147 |
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148 | int skipit(buf, len, skip)
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149 | char *buf;
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150 | int len;
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151 | int *skip;
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152 | {
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153 | static int lf = 0;
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154 | static int crlf = 0;
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155 | char *p;
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156 |
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157 | p = buf;
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158 |
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159 | while(--len >= 0) {
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160 | if((crlf == 0 || crlf == 2) && *p == '\r')
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161 | crlf++;
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162 | else
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163 | if((crlf == 1 || crlf == 3) && *p == '\n')
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164 | crlf++;
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165 | else
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166 | crlf = 0;
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167 | if(*p == '\n')
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168 | lf++;
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169 | else
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170 | lf = 0;
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171 | if(crlf == 4 || lf == 2) {
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172 | *skip = 0;
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173 | return(len);
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174 | }
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175 | p++;
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176 | }
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177 |
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178 | return(0);
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179 | }
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180 |
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181 | int httpget(host, port, user, pass, path, headers, discard, post)
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182 | char *host;
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183 | int port;
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184 | char *user;
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185 | char *pass;
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186 | char *path;
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187 | int headers;
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188 | int discard;
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189 | int post;
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190 | {
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191 | int fd;
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192 | int skip;
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193 | int s;
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194 | int s2;
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195 | char *a;
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196 | char *qs;
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197 | int len;
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198 |
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199 | if(port == 0)
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200 | port = 80;
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201 |
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202 | fd = connect(host, port);
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203 | if(fd < 0) {
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204 | fprintf(stderr, "httpget: Could not connect to %s:%d\n", host, port);
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205 | return(-1);
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206 | }
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207 |
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208 | if(post) {
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209 | qs = strrchr(path, '?');
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210 | if(qs != (char *)NULL) {
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211 | *qs++ = '\0';
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212 | len = strlen(qs);
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213 | } else
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214 | len = 0;
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215 | }
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216 |
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217 | if(post && len > 0)
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218 | write(fd, "POST ", 5);
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219 | else
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220 | write(fd, "GET ", 4);
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221 | write(fd, path, strlen(path));
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222 | write(fd, " HTTP/1.0\r\n", 11);
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223 | write(fd, "User-Agent: urlget\r\n", 20);
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224 | write(fd, "Connection: Close\r\n", 19);
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225 | if(*user) {
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226 | write(fd, "Authorization: ", 15);
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227 | a = auth(user, pass);
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228 | write(fd, a, strlen(a));
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229 | write(fd, "\r\n", 2);
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230 | }
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231 | if(post && len > 0) {
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232 | sprintf(buffer, "Content-Length: %u\r\n", len);
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233 | write(fd, buffer, strlen(buffer));
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234 | }
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235 | write(fd, "Host: ", 6);
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236 | write(fd, host, strlen(host));
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237 | write(fd, "\r\n", 2);
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238 | write(fd, "\r\n", 2);
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239 | if(post && len > 0)
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240 | write(fd, qs, len);
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241 |
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242 | skip = 1;
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243 | while((s = read(fd, buffer, sizeof(buffer)-1)) > 0) {
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244 | buffer[s] = '\0';
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245 | if(skip) {
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246 | static int firstline = 1;
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247 | if(firstline) {
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248 | static char linebuf[1000];
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249 | int l = 0;
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250 | int c, v1, v2, e;
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251 | if(s >= sizeof(linebuf)-l)
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252 | c = sizeof(linebuf)-1-l;
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253 | else c = s;
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254 | memcpy(linebuf+l, buffer, c);
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255 | linebuf[l+c] = '\0';
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256 | if(strchr(buffer, '\n') || strchr(buffer, '\r'))
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257 | firstline = 0;
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258 | if(sscanf(linebuf, "HTTP/%d.%d %d ", &v1, &v2, &e) == 3
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259 | && e != 200) {
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260 | fprintf(stderr, "HTTP error %d\n", e);
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261 | return -1;
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262 | }
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263 | }
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264 |
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265 | s2 = skipit(buffer, s, &skip);
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266 | if(headers)
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267 | write(1, buffer, s - s2);
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268 | } else
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269 | s2 = s;
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270 | if(s2 && !discard)
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271 | if(write(1, &buffer[s - s2], s2) != s2) {
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272 | perror("write");
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273 | return(-1);
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274 | }
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275 | }
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276 | if(s < 0) {
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277 | fprintf(stderr, "httpget: Read error\n");
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278 | return(-1);
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279 | }
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280 |
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281 | close(fd);
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282 |
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283 | return(0);
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284 | }
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285 |
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286 | void ftppasv(reply)
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287 | char *reply;
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288 | {
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289 | char *p;
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290 | unsigned char n[6];
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291 | int i;
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292 |
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293 | ftppport = 0;
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294 |
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295 | p = reply;
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296 | while(*p && *p != '(') p++;
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297 | if(!*p) return;
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298 | p++;
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299 | i = 0;
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300 | while(1) {
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301 | n[i++] = atoi(p);
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302 | if(i == 6) break;
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303 | p = strchr(p, ',');
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304 | if(p == (char *)NULL) return;
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305 | p++;
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306 | }
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307 | sprintf(ftpphost, "%d.%d.%d.%d", n[0], n[1], n[2], n[3]);
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308 | ftppport = n[4] * 256 + n[5];
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309 | return;
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310 | }
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311 |
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312 | int ftpreply(fpr)
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313 | FILE *fpr;
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314 | {
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315 | static char reply[256];
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316 | int s;
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317 | char code[4];
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318 | int ft;
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319 |
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320 | do {
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321 | ft = 1;
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322 | do {
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323 | if(fgets(reply, sizeof(reply), fpr) == (char *)NULL)
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324 | return(-1);
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325 | if(ft) {
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326 | ft = 0;
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327 | strncpy(code, reply, 3);
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328 | code[3] = '\0';
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329 | }
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330 | } while(strncmp(reply, code, 3) || reply[3] == '-');
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331 | s = atoi(code);
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332 | } while(s < 200 && s != 125 && s != 150);
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333 | if(s == 227) ftppasv(reply);
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334 | return(s);
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335 | }
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336 |
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337 | int ftpcmd(fpw, fpr, cmd, arg)
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338 | FILE *fpw;
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339 | FILE *fpr;
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340 | char *cmd;
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341 | char *arg;
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342 | {
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343 | fprintf(fpw, "%s%s%s\r\n", cmd, *arg ? " " : "", arg);
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344 | fflush(fpw);
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345 | return(ftpreply(fpr));
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346 | }
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347 |
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348 | int ftpget(host, port, user, pass, path, type)
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349 | char *host;
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350 | int port;
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351 | char *user;
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352 | char *pass;
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353 | char *path;
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354 | int type;
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355 | {
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356 | int fd;
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357 | int fd2;
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358 | FILE *fpr;
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359 | FILE *fpw;
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360 | int s;
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361 | int s2;
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362 | char *p;
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363 | char *p2;
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364 | char typec[2];
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365 |
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366 | if(port == 0)
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367 | port = 21;
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368 |
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369 | if(type == '\0')
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370 | type = 'i';
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371 |
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372 | fd = connect(host, port);
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373 | if(fd < 0) {
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374 | fprintf(stderr, "ftpget: Could not connect to %s:%d\n", host, port);
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375 | return(-1);
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376 | }
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377 | fpr = fdopen(fd, "r");
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378 | fpw = fdopen(fd, "w");
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379 |
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380 | s = ftpreply(fpr);
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381 | if(s / 100 != 2) goto error;
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382 | s = ftpcmd(fpw, fpr, "USER", *user ? user : "ftp");
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383 | if(s / 100 == 3)
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384 | s = ftpcmd(fpw, fpr, "PASS", *pass ? pass : "urlget@");
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385 |
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386 | if(s / 100 != 2) goto error;
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387 |
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388 | p = path;
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389 | if(*p == '/') p++;
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390 | while((p2 = strchr(p, '/')) != (char *)NULL) {
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391 | *p2++ = '\0';
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392 | s = ftpcmd(fpw, fpr, "CWD", unesc(p));
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393 | p = p2;
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394 | }
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395 | sprintf(typec, "%c", type == 'd' ? 'A' : type);
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396 | s = ftpcmd(fpw, fpr, "TYPE", typec);
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397 | if(s / 100 != 2) goto error;
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398 | s = ftpcmd(fpw, fpr, "PASV", "");
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399 | if(s != 227) goto error;
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400 | fd2 = connect(ftpphost, ftppport);
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401 | if(fd2 < 0) goto error;
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402 | s = ftpcmd(fpw, fpr, type == 'd' ? "NLST" : "RETR", unesc(p));
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403 | if(s / 100 != 1) goto error;
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404 | while((s = read(fd2, buffer, sizeof(buffer))) > 0) {
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405 | s2 = write(1, buffer, s);
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406 | if(s2 != s) break;
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407 | }
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408 | if(s2 != s && s != 0) s = -1;
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409 | close(fd2);
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410 |
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411 | s = ftpreply(fpr);
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412 | if(s / 100 == 2) s = 0;
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413 |
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414 | error:
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415 | (void) ftpcmd(fpw, fpr, "QUIT", "");
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416 |
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417 | fclose(fpr);
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418 | fclose(fpw);
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419 | close(fd);
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420 |
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421 | return(s == 0 ? 0 : -1);
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422 | }
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423 |
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424 | int tcpget(host, port, user, pass, path)
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425 | char *host;
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426 | int port;
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427 | char *user;
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428 | char *pass;
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429 | char *path;
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430 | {
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431 | int fd;
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432 | int s;
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433 | int s2;
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434 |
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435 | if(port == 0) {
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436 | fprintf(stderr, "tcpget: No port specified\n");
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437 | return(-1);
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438 | }
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439 |
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440 | fd = connect(host, port);
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441 | if(fd < 0) {
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442 | fprintf(stderr, "httpget: Could not connect to %s:%d\n", host, port);
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443 | return(-1);
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444 | }
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445 | if(*path == '\/')
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446 | path++;
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447 |
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448 | write(fd, path, strlen(path));
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449 | write(fd, "\n", 1);
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450 | while((s = read(fd, buffer, sizeof(buffer))) > 0) {
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451 | s2 = write(1, buffer, s);
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452 | if(s2 != s) break;
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453 | }
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454 | close(fd);
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455 | return(0);
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456 | }
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457 |
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458 | int main(argc, argv)
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459 | int argc;
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460 | char *argv[];
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461 | {
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462 | char *prog;
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463 | char *url;
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464 | char scheme;
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465 | char user[64];
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466 | char pass[64];
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467 | char host[64];
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468 | int port;
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469 | char *path;
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470 | int type;
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471 | char *ps;
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472 | char *p;
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473 | char *at;
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474 | int s, c;
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475 | int opt_h = 0;
|
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476 | int opt_d = 0;
|
---|
477 | int opt_p = 0;
|
---|
478 |
|
---|
479 | prog = strrchr(*argv, '/');
|
---|
480 | if(prog == (char *)NULL)
|
---|
481 | prog = *argv;
|
---|
482 | argv++;
|
---|
483 | argc--;
|
---|
484 |
|
---|
485 | while(argc && argv[0][0] == '-') {
|
---|
486 | char *opt = *argv++ + 1;
|
---|
487 | argc--;
|
---|
488 |
|
---|
489 | if (opt[0] == '-' && opt[1] == 0) break;
|
---|
490 |
|
---|
491 | while (*opt) switch (*opt++) {
|
---|
492 | case 'h': opt_h = -1; break;
|
---|
493 | case 'd': opt_d = -1; break;
|
---|
494 | case 'p': opt_p = -1; break;
|
---|
495 | default: argc = 0; break;
|
---|
496 | }
|
---|
497 | }
|
---|
498 |
|
---|
499 | if(strcmp(prog, "ftpget") == 0) {
|
---|
500 | if(argc < 2 || argc > 4) {
|
---|
501 | fprintf(stderr, "Usage: %s host path [user [pass]]\n", prog);
|
---|
502 | return(-1);
|
---|
503 | }
|
---|
504 | strncpy(host, *argv++, sizeof(host));
|
---|
505 | port = 21;
|
---|
506 | path = *argv++;
|
---|
507 | if(argc) {
|
---|
508 | strncpy(user, *argv++, sizeof(user));
|
---|
509 | argc++;
|
---|
510 | } else
|
---|
511 | *user = '\0';
|
---|
512 | if(argc) {
|
---|
513 | strncpy(pass, *argv++, sizeof(pass));
|
---|
514 | argc++;
|
---|
515 | } else
|
---|
516 | *pass = '\0';
|
---|
517 | s = ftpget(host, port, user, path, path, 'i');
|
---|
518 | return(s);
|
---|
519 | }
|
---|
520 | if(strcmp(prog, "httpget") == 0) {
|
---|
521 | if(argc != 2) {
|
---|
522 | fprintf(stderr, "Usage: %s [-h] [-d] [-p] host path\n", prog);
|
---|
523 | return(-1);
|
---|
524 | }
|
---|
525 | strncpy(host, *argv++, sizeof(host));
|
---|
526 | port = 80;
|
---|
527 | path = *argv++;
|
---|
528 | s = httpget(host, port, user, path, path, opt_h, opt_d, opt_p);
|
---|
529 | return(s);
|
---|
530 | }
|
---|
531 |
|
---|
532 | if(argc != 1) {
|
---|
533 | usage:
|
---|
534 | fprintf(stderr, "Usage: %s [-h] [-p] url\n", prog);
|
---|
535 | return(-1);
|
---|
536 | }
|
---|
537 |
|
---|
538 | url = *argv++;
|
---|
539 | argc--;
|
---|
540 |
|
---|
541 | if(strncasecmp(url, "http://", 7) == 0) {
|
---|
542 | scheme = SCHEME_HTTP;
|
---|
543 | ps = url + 7;
|
---|
544 | } else
|
---|
545 | if(strncasecmp(url, "ftp://", 6) == 0) {
|
---|
546 | scheme = SCHEME_FTP;
|
---|
547 | ps = url + 6;
|
---|
548 | } else
|
---|
549 | if(strncasecmp(url, "tcp://", 6) == 0) {
|
---|
550 | scheme = SCHEME_TCP;
|
---|
551 | ps = url + 6;
|
---|
552 | } else {
|
---|
553 | fprintf(stderr, "%s: I do not handle this scheme\n", prog);
|
---|
554 | return(-1);
|
---|
555 | }
|
---|
556 |
|
---|
557 | user[0] = '\0';
|
---|
558 | pass[0] = '\0';
|
---|
559 | host[0] = '\0';
|
---|
560 | port = 0;
|
---|
561 |
|
---|
562 | p = ps;
|
---|
563 | while(*p && *p != '/') p++;
|
---|
564 | path = p;
|
---|
565 | c = *path;
|
---|
566 | *path = '\0';
|
---|
567 |
|
---|
568 | at = strchr(ps, '@');
|
---|
569 | if(at != (char *)NULL) {
|
---|
570 | *at = '\0';
|
---|
571 | p = ps;
|
---|
572 | while(*p && *p != ':') p++;
|
---|
573 | if(*p)
|
---|
574 | *p++ = '\0';
|
---|
575 | strcpy(user, ps);
|
---|
576 | strcpy(pass, p);
|
---|
577 | ps = at + 1;
|
---|
578 | }
|
---|
579 |
|
---|
580 | *path = c;
|
---|
581 | p = ps;
|
---|
582 | while(*p && *p != '/' && *p != ':') p++;
|
---|
583 | strncpy(host, ps, p - ps);
|
---|
584 | host[p - ps] = '\0';
|
---|
585 | if(*p == ':') {
|
---|
586 | p++;
|
---|
587 | ps = p;
|
---|
588 | while(*p && *p != '/')
|
---|
589 | port = port * 10 + (*p++ - '0');
|
---|
590 | }
|
---|
591 | if(*p == '/')
|
---|
592 | path = p;
|
---|
593 | else
|
---|
594 | path = "/";
|
---|
595 | if(scheme == SCHEME_FTP) {
|
---|
596 | p = path;
|
---|
597 | while(*p && *p != ';') p++;
|
---|
598 | if(*p) {
|
---|
599 | *p++ = '\0';
|
---|
600 | if(strncasecmp(p, "type=", 5) == 0) {
|
---|
601 | p += 5;
|
---|
602 | type = tolower(*p);
|
---|
603 | }
|
---|
604 | }
|
---|
605 | }
|
---|
606 |
|
---|
607 | #if 0
|
---|
608 | fprintf(stderr, "Host: %s\n", host);
|
---|
609 | fprintf(stderr, "Port: %d\n", port);
|
---|
610 | fprintf(stderr, "User: %s\n", user);
|
---|
611 | fprintf(stderr, "Pass: %s\n", pass);
|
---|
612 | fprintf(stderr, "Path: %s\n", path);
|
---|
613 | fprintf(stderr, "Type: %c\n", type);
|
---|
614 | #endif
|
---|
615 |
|
---|
616 | switch(scheme) {
|
---|
617 | case SCHEME_HTTP:
|
---|
618 | s = httpget(host, port, user, pass, path, opt_h, opt_d, opt_p);
|
---|
619 | break;
|
---|
620 | case SCHEME_FTP:
|
---|
621 | s = ftpget(host, port, user, pass, path, type);
|
---|
622 | break;
|
---|
623 | case SCHEME_TCP:
|
---|
624 | s = tcpget(host, port, user, pass, path);
|
---|
625 | break;
|
---|
626 | }
|
---|
627 |
|
---|
628 | return(s);
|
---|
629 | }
|
---|