1 | /* |
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2 | * libyahoo2: yahoo_httplib.c |
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3 | * |
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4 | * Copyright (C) 2002-2004, Philip S Tellis <philip.tellis AT gmx.net> |
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5 | * |
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6 | * This program is free software; you can redistribute it and/or modify |
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7 | * it under the terms of the GNU General Public License as published by |
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8 | * the Free Software Foundation; either version 2 of the License, or |
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9 | * (at your option) any later version. |
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10 | * |
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11 | * This program is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | * GNU General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU General Public License |
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17 | * along with this program; if not, write to the Free Software |
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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19 | * |
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20 | */ |
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21 | |
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22 | #include <stdio.h> |
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23 | #include <stdlib.h> |
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24 | |
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25 | #if STDC_HEADERS |
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26 | # include <string.h> |
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27 | #else |
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28 | # if !HAVE_STRCHR |
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29 | # define strchr index |
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30 | # define strrchr rindex |
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31 | # endif |
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32 | char *strchr(), *strrchr(); |
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33 | # if !HAVE_MEMCPY |
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34 | # define memcpy(d, s, n) bcopy((s), (d), (n)) |
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35 | # define memmove(d, s, n) bcopy((s), (d), (n)) |
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36 | # endif |
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37 | #endif |
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38 | |
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39 | #include <errno.h> |
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40 | #include <unistd.h> |
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41 | #include <ctype.h> |
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42 | #include "yahoo2.h" |
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43 | #include "yahoo2_callbacks.h" |
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44 | #include "yahoo_httplib.h" |
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45 | #include "yahoo_util.h" |
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46 | |
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47 | #include "yahoo_debug.h" |
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48 | #ifdef __MINGW32__ |
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49 | # include <winsock2.h> |
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50 | # define snprintf _snprintf |
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51 | #endif |
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52 | |
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53 | #ifdef USE_STRUCT_CALLBACKS |
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54 | extern struct yahoo_callbacks *yc; |
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55 | #define YAHOO_CALLBACK(x) yc->x |
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56 | #else |
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57 | #define YAHOO_CALLBACK(x) x |
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58 | #endif |
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59 | |
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60 | extern enum yahoo_log_level log_level; |
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61 | |
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62 | #if 0 |
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63 | int yahoo_tcp_readline(char *ptr, int maxlen, void *fd) |
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64 | { |
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65 | int n, rc; |
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66 | char c; |
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67 | |
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68 | for (n = 1; n < maxlen; n++) { |
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69 | |
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70 | do { |
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71 | rc = YAHOO_CALLBACK (ext_yahoo_read) (fd, &c, 1); |
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72 | } while (rc == -1 && (errno == EINTR || errno == EAGAIN)); /* this is bad - it should be done asynchronously */ |
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73 | |
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74 | if (rc == 1) { |
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75 | if (c == '\r') { /* get rid of \r */ |
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76 | continue; |
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77 | } |
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78 | *ptr = c; |
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79 | if (c == '\n') { |
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80 | break; |
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81 | } |
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82 | ptr++; |
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83 | } else if (rc == 0) { |
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84 | if (n == 1) { |
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85 | return (0); /* EOF, no data */ |
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86 | } else { |
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87 | break; /* EOF, w/ data */ |
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88 | } |
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89 | } else { |
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90 | return -1; |
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91 | } |
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92 | } |
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93 | |
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94 | *ptr = 0; |
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95 | return (n); |
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96 | } |
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97 | #endif |
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98 | |
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99 | static int url_to_host_port_path(const char *url, |
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100 | char *host, int *port, char *path, int *ssl) |
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101 | { |
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102 | char *urlcopy = NULL; |
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103 | char *slash = NULL; |
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104 | char *colon = NULL; |
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105 | |
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106 | /* |
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107 | * http://hostname |
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108 | * http://hostname/ |
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109 | * http://hostname/path |
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110 | * http://hostname/path:foo |
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111 | * http://hostname:port |
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112 | * http://hostname:port/ |
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113 | * http://hostname:port/path |
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114 | * http://hostname:port/path:foo |
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115 | * and https:// variants of the above |
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116 | */ |
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117 | |
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118 | if (strstr(url, "http://") == url) { |
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119 | urlcopy = strdup(url + 7); |
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120 | } else if (strstr(url, "https://") == url) { |
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121 | urlcopy = strdup(url + 8); |
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122 | *ssl = 1; |
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123 | } else { |
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124 | WARNING(("Weird url - unknown protocol: %s", url)); |
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125 | return 0; |
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126 | } |
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127 | |
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128 | slash = strchr(urlcopy, '/'); |
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129 | colon = strchr(urlcopy, ':'); |
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130 | |
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131 | if (!colon || (slash && slash < colon)) { |
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132 | if (*ssl) { |
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133 | *port = 443; |
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134 | } else { |
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135 | *port = 80; |
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136 | } |
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137 | } else { |
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138 | *colon = 0; |
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139 | *port = atoi(colon + 1); |
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140 | } |
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141 | |
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142 | if (!slash) { |
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143 | strcpy(path, "/"); |
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144 | } else { |
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145 | strcpy(path, slash); |
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146 | *slash = 0; |
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147 | } |
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148 | |
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149 | strcpy(host, urlcopy); |
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150 | |
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151 | FREE(urlcopy); |
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152 | |
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153 | return 1; |
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154 | } |
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155 | |
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156 | static int isurlchar(unsigned char c) |
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157 | { |
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158 | return (g_ascii_isalnum(c)); |
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159 | } |
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160 | |
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161 | char *yahoo_urlencode(const char *instr) |
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162 | { |
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163 | int ipos = 0, bpos = 0; |
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164 | char *str = NULL; |
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165 | int len = strlen(instr); |
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166 | |
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167 | if (!(str = y_new(char, 3 * len + 1))) { |
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168 | return ""; |
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169 | } |
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170 | |
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171 | while (instr[ipos]) { |
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172 | while (isurlchar(instr[ipos])) { |
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173 | str[bpos++] = instr[ipos++]; |
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174 | } |
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175 | if (!instr[ipos]) { |
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176 | break; |
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177 | } |
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178 | |
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179 | snprintf(&str[bpos], 4, "%%%02x", instr[ipos] & 0xff); |
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180 | bpos += 3; |
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181 | ipos++; |
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182 | } |
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183 | str[bpos] = '\0'; |
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184 | |
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185 | /* free extra alloc'ed mem. */ |
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186 | len = strlen(str); |
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187 | str = y_renew(char, str, len + 1); |
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188 | |
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189 | return (str); |
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190 | } |
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191 | |
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192 | #if 0 |
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193 | char *yahoo_urldecode(const char *instr) |
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194 | { |
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195 | int ipos = 0, bpos = 0; |
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196 | char *str = NULL; |
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197 | char entity[3] = { 0, 0, 0 }; |
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198 | unsigned dec; |
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199 | int len = strlen(instr); |
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200 | |
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201 | if (!(str = y_new(char, len + 1))) { |
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202 | return ""; |
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203 | } |
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204 | |
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205 | while (instr[ipos]) { |
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206 | while (instr[ipos] && instr[ipos] != '%') { |
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207 | if (instr[ipos] == '+') { |
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208 | str[bpos++] = ' '; |
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209 | ipos++; |
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210 | } else { |
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211 | str[bpos++] = instr[ipos++]; |
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212 | } |
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213 | } |
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214 | if (!instr[ipos]) { |
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215 | break; |
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216 | } |
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217 | |
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218 | if (instr[ipos + 1] && instr[ipos + 2]) { |
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219 | ipos++; |
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220 | entity[0] = instr[ipos++]; |
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221 | entity[1] = instr[ipos++]; |
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222 | sscanf(entity, "%2x", &dec); |
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223 | str[bpos++] = (char) dec; |
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224 | } else { |
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225 | str[bpos++] = instr[ipos++]; |
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226 | } |
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227 | } |
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228 | str[bpos] = '\0'; |
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229 | |
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230 | /* free extra alloc'ed mem. */ |
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231 | len = strlen(str); |
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232 | str = y_renew(char, str, len + 1); |
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233 | |
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234 | return (str); |
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235 | } |
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236 | |
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237 | char *yahoo_xmldecode(const char *instr) |
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238 | { |
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239 | int ipos = 0, bpos = 0, epos = 0; |
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240 | char *str = NULL; |
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241 | char entity[4] = { 0, 0, 0, 0 }; |
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242 | char *entitymap[5][2] = { |
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243 | { "amp;", "&" }, |
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244 | { "quot;", "\"" }, |
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245 | { "lt;", "<" }, |
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246 | { "gt;", "<" }, |
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247 | { "nbsp;", " " } |
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248 | }; |
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249 | unsigned dec; |
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250 | int len = strlen(instr); |
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251 | |
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252 | if (!(str = y_new(char, len + 1))) { |
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253 | return ""; |
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254 | } |
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255 | |
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256 | while (instr[ipos]) { |
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257 | while (instr[ipos] && instr[ipos] != '&') { |
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258 | if (instr[ipos] == '+') { |
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259 | str[bpos++] = ' '; |
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260 | ipos++; |
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261 | } else { |
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262 | str[bpos++] = instr[ipos++]; |
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263 | } |
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264 | } |
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265 | if (!instr[ipos] || !instr[ipos + 1]) { |
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266 | break; |
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267 | } |
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268 | ipos++; |
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269 | |
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270 | if (instr[ipos] == '#') { |
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271 | ipos++; |
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272 | epos = 0; |
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273 | while (instr[ipos] != ';') { |
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274 | entity[epos++] = instr[ipos++]; |
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275 | } |
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276 | sscanf(entity, "%u", &dec); |
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277 | str[bpos++] = (char) dec; |
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278 | ipos++; |
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279 | } else { |
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280 | int i; |
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281 | for (i = 0; i < 5; i++) { |
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282 | if (!strncmp(instr + ipos, entitymap[i][0], |
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283 | strlen(entitymap[i][0]))) { |
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284 | str[bpos++] = entitymap[i][1][0]; |
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285 | ipos += strlen(entitymap[i][0]); |
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286 | break; |
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287 | } |
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288 | } |
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289 | } |
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290 | } |
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291 | str[bpos] = '\0'; |
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292 | |
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293 | /* free extra alloc'ed mem. */ |
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294 | len = strlen(str); |
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295 | str = y_renew(char, str, len + 1); |
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296 | |
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297 | return (str); |
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298 | } |
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299 | #endif |
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300 | |
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301 | typedef void (*http_connected) (int id, void *fd, int error); |
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302 | |
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303 | struct callback_data { |
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304 | int id; |
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305 | yahoo_get_fd_callback callback; |
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306 | char *request; |
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307 | void *user_data; |
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308 | }; |
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309 | |
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310 | static void connect_complete(void *fd, int error, void *data) |
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311 | { |
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312 | struct callback_data *ccd = data; |
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313 | |
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314 | if (error == 0) { |
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315 | YAHOO_CALLBACK (ext_yahoo_write) (fd, ccd->request, |
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316 | strlen(ccd->request)); |
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317 | } |
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318 | free(ccd->request); |
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319 | ccd->callback(ccd->id, fd, error, ccd->user_data); |
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320 | FREE(ccd); |
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321 | } |
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322 | |
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323 | static void yahoo_send_http_request(int id, char *host, int port, char *request, |
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324 | yahoo_get_fd_callback callback, void *data, int use_ssl) |
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325 | { |
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326 | struct callback_data *ccd = y_new0(struct callback_data, 1); |
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327 | |
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328 | ccd->callback = callback; |
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329 | ccd->id = id; |
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330 | ccd->request = strdup(request); |
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331 | ccd->user_data = data; |
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332 | |
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333 | YAHOO_CALLBACK (ext_yahoo_connect_async) (id, host, port, |
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334 | connect_complete, ccd, use_ssl); |
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335 | } |
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336 | |
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337 | void yahoo_http_post(int id, const char *url, const char *cookies, |
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338 | long content_length, yahoo_get_fd_callback callback, void *data) |
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339 | { |
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340 | char host[255]; |
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341 | int port = 80; |
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342 | char path[255]; |
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343 | char buff[1024]; |
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344 | int ssl = 0; |
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345 | |
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346 | if (!url_to_host_port_path(url, host, &port, path, &ssl)) { |
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347 | return; |
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348 | } |
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349 | |
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350 | /* thanks to kopete dumpcap */ |
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351 | snprintf(buff, sizeof(buff), |
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352 | "POST %s HTTP/1.1\r\n" |
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353 | "Cookie: %s\r\n" |
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354 | "User-Agent: Mozilla/5.0\r\n" |
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355 | "Host: %s\r\n" |
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356 | "Content-Length: %ld\r\n" |
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357 | "Cache-Control: no-cache\r\n" |
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358 | "\r\n", path, cookies, host, content_length); |
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359 | |
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360 | yahoo_send_http_request(id, host, port, buff, callback, data, ssl); |
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361 | } |
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362 | |
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363 | void yahoo_http_get(int id, const char *url, const char *cookies, int http11, |
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364 | int keepalive, yahoo_get_fd_callback callback, void *data) |
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365 | { |
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366 | char host[255]; |
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367 | int port = 80; |
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368 | char path[255]; |
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369 | char buff[2048]; |
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370 | char cookiebuff[1024]; |
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371 | int ssl = 0; |
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372 | |
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373 | if (!url_to_host_port_path(url, host, &port, path, &ssl)) { |
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374 | return; |
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375 | } |
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376 | |
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377 | /* Allow cases when we don't need to send a cookie */ |
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378 | if (cookies) { |
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379 | snprintf(cookiebuff, sizeof(cookiebuff), "Cookie: %s\r\n", |
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380 | cookies); |
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381 | } else { |
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382 | cookiebuff[0] = '\0'; |
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383 | } |
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384 | |
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385 | snprintf(buff, sizeof(buff), |
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386 | "GET %s HTTP/1.%s\r\n" |
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387 | "%sHost: %s\r\n" |
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388 | "User-Agent: Mozilla/4.5 [en] (" PACKAGE "/" VERSION ")\r\n" |
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389 | "Accept: */*\r\n" |
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390 | "%s" "\r\n", path, http11 ? "1" : "0", cookiebuff, host, |
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391 | keepalive ? "Connection: Keep-Alive\r\n" : "Connection: close\r\n"); |
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392 | |
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393 | yahoo_send_http_request(id, host, port, buff, callback, data, ssl); |
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394 | } |
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395 | |
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396 | void yahoo_http_head(int id, const char *url, const char *cookies, int len, |
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397 | char *payload, yahoo_get_fd_callback callback, void *data) |
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398 | { |
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399 | char host[255]; |
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400 | int port = 80; |
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401 | char path[255]; |
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402 | char buff[2048]; |
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403 | char cookiebuff[1024]; |
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404 | int ssl = 0; |
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405 | |
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406 | if (!url_to_host_port_path(url, host, &port, path, &ssl)) { |
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407 | return; |
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408 | } |
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409 | |
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410 | /* Allow cases when we don't need to send a cookie */ |
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411 | if (cookies) { |
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412 | snprintf(cookiebuff, sizeof(cookiebuff), "Cookie: %s\r\n", |
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413 | cookies); |
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414 | } else { |
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415 | cookiebuff[0] = '\0'; |
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416 | } |
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417 | |
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418 | snprintf(buff, sizeof(buff), |
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419 | "HEAD %s HTTP/1.0\r\n" |
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420 | "Accept: */*\r\n" |
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421 | "Host: %s:%d\r\n" |
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422 | "User-Agent: Mozilla/4.5 [en] (" PACKAGE "/" VERSION ")\r\n" |
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423 | "%s" |
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424 | "Content-Length: %d\r\n" |
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425 | "Cache-Control: no-cache\r\n" |
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426 | "\r\n%s", path, host, port, cookiebuff, len, |
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427 | payload ? payload : ""); |
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428 | |
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429 | yahoo_send_http_request(id, host, port, buff, callback, data, ssl); |
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430 | } |
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431 | |
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