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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2015 Olaf Wintermann. All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include <time.h> |
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30 | #include <stdio.h> |
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31 | #include <stdlib.h> |
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32 | #include <string.h> |
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33 | #include <ucx/string.h> |
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34 | #include <ucx/buffer.h> |
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35 | #include <ucx/utils.h> |
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36 | #include <libxml/tree.h> |
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37 | #include <curl/curl.h> |
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38 | |
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39 | #include <openssl/sha.h> |
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40 | #include <openssl/hmac.h> |
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41 | #include <openssl/evp.h> |
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42 | #include <openssl/bio.h> |
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43 | #include <openssl/buffer.h> |
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44 | #include <openssl/rand.h> |
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45 | |
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46 | #include "utils.h" |
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47 | #include "crypto.h" |
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48 | #include "webdav.h" |
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49 | |
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50 | |
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51 | time_t util_parse_creationdate(char *str) { |
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52 | // example: 2012-11-29T21:35:35Z |
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53 | if(!str) { |
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54 | return 0; |
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55 | } |
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56 | // TODO |
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57 | return 0; |
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58 | } |
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59 | |
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60 | time_t util_parse_lastmodified(char *str) { |
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61 | // example: Thu, 29 Nov 2012 21:35:35 GMT |
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62 | if(!str) { |
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63 | return 0; |
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64 | } else { |
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65 | return curl_getdate(str, NULL); |
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66 | } |
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67 | } |
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68 | |
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69 | int util_getboolean(char *v) { |
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70 | if(v[0] == 'T' || v[0] == 't') { |
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71 | return 1; |
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72 | } |
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73 | return 0; |
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74 | } |
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75 | |
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76 | int util_strtoint(char *str, int64_t *value) { |
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77 | char *end; |
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78 | int64_t val = strtoll(str, &end, 0); |
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79 | if(strlen(end) == 0) { |
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80 | *value = val; |
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81 | return 1; |
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82 | } else { |
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83 | return 0; |
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84 | } |
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85 | } |
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86 | |
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87 | char* util_url_path(char *url) { |
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88 | char *path = NULL; |
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89 | size_t len = strlen(url); |
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90 | int slashcount = 0; |
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91 | int slmax; |
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92 | if(len > 7 && !strncasecmp(url, "http://", 7)) { |
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93 | slmax = 3; |
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94 | } else if(len > 8 && !strncasecmp(url, "https://", 8)) { |
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95 | slmax = 3; |
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96 | } else { |
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97 | slmax = 1; |
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98 | } |
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99 | char c; |
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100 | for(int i=0;i<len;i++) { |
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101 | c = url[i]; |
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102 | if(c == '/') { |
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103 | slashcount++; |
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104 | if(slashcount == slmax) { |
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105 | path = url + i; |
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106 | break; |
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107 | } |
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108 | } |
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109 | } |
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110 | return path; |
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111 | } |
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112 | |
66 | 113 | char* util_url_decode(DavSession *sn, char *url) { |
114 | char *unesc = curl_easy_unescape(sn->handle, url, strlen(url), NULL); | |
115 | char *ret = strdup(unesc); | |
116 | curl_free(unesc); | |
117 | return ret; | |
118 | } | |
119 | ||
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120 | char* util_resource_name(char *url) { |
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121 | int si = 0; |
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122 | int osi = 0; |
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123 | int i = 0; |
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124 | int p = 0; |
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125 | char c; |
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126 | while((c = url[i]) != 0) { |
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127 | if(c == '/') { |
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128 | osi = si; |
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129 | si = i; |
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130 | p = 1; |
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131 | } |
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132 | i++; |
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133 | } |
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134 | |
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135 | char *name = url + si + p; |
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136 | if(name[0] == 0) { |
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137 | name = url + osi + p; |
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138 | if(name[0] == 0) { |
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139 | return url; |
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140 | } |
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141 | } |
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142 | |
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143 | return name; |
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144 | } |
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145 | |
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146 | int util_mkdir(char *path, mode_t mode) { |
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147 | #ifdef _WIN32 |
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148 | return mkdir(path); |
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149 | #else |
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150 | return mkdir(path, mode); |
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151 | #endif |
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152 | } |
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153 | |
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154 | char* util_concat_path(char *url_base, char *p) { |
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155 | sstr_t base = sstr(url_base); |
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156 | sstr_t path; |
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157 | if(p) { |
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158 | path = sstr(p); |
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159 | } else { |
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160 | path = sstrn("", 0); |
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161 | } |
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162 | |
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163 | int add_separator = 0; |
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164 | if(base.ptr[base.length-1] == '/') { |
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165 | if(path.ptr[0] == '/') { |
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166 | base.length--; |
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167 | } |
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168 | } else { |
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169 | if(path.length == 0 || path.ptr[0] != '/') { |
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170 | add_separator = 1; |
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171 | } |
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172 | } |
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173 | |
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174 | sstr_t url; |
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175 | if(add_separator) { |
70 | 176 | url = sstrcat(3, base, sstr("/"), path); |
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177 | } else { |
70 | 178 | url = sstrcat(2, base, path); |
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179 | } |
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180 | |
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181 | return url.ptr; |
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182 | } |
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183 | |
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184 | void util_set_url(DavSession *sn, char *href) { |
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185 | sstr_t base = sstr(sn->base_url); |
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186 | sstr_t href_str = sstr(href); |
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187 | |
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188 | char *base_path = util_url_path(sn->base_url); |
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189 | base.length -= strlen(base_path); |
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190 | |
70 | 191 | sstr_t url = sstrcat(2, base, href_str); |
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192 | |
71 | 193 | curl_easy_setopt(sn->handle, CURLOPT_URL, url.ptr); |
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194 | free(url.ptr); |
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195 | } |
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196 | |
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197 | char* util_path_to_url(DavSession *sn, char *path) { |
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198 | char *space = malloc(256); |
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199 | UcxBuffer *url = ucx_buffer_new(space, 256, UCX_BUFFER_AUTOEXTEND); |
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200 | |
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201 | // add base url |
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202 | ucx_buffer_write(sn->base_url, 1, strlen(sn->base_url), url); |
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203 | // remove trailing slash |
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204 | ucx_buffer_seek(url, -1, SEEK_CUR); |
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205 | |
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206 | sstr_t p = sstr(path); |
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207 | ssize_t ntk = 0; |
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208 | sstr_t *tks = sstrsplit(p, S("/"), &ntk); |
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209 | |
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210 | for(int i=0;i<ntk;i++) { |
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211 | sstr_t node = tks[i]; |
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212 | if(node.length > 0) { |
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213 | char *esc = curl_easy_escape(sn->handle, node.ptr, node.length); |
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214 | ucx_buffer_putc(url, '/'); |
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215 | ucx_buffer_write(esc, 1, strlen(esc), url); |
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216 | curl_free(esc); |
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217 | } |
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218 | free(node.ptr); |
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219 | } |
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220 | free(tks); |
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221 | if(path[p.length-1] == '/') { |
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222 | ucx_buffer_putc(url, '/'); |
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223 | } |
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224 | ucx_buffer_putc(url, 0); |
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225 | |
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226 | space = url->space; |
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227 | ucx_buffer_free(url); |
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228 | |
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229 | return space; |
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230 | } |
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231 | |
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232 | char* util_parent_path(char *path) { |
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233 | char *name = util_resource_name(path); |
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234 | size_t namelen = strlen(name); |
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235 | size_t pathlen = strlen(path); |
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236 | size_t parentlen = pathlen - namelen; |
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237 | char *parent = malloc(parentlen + 1); |
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238 | memcpy(parent, path, parentlen); |
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239 | parent[parentlen] = '\0'; |
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240 | return parent; |
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241 | } |
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242 | |
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243 | |
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244 | char* util_xml_get_text(xmlNode *elm) { |
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245 | xmlNode *node = elm->children; |
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246 | while(node) { |
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247 | if(node->type == XML_TEXT_NODE) { |
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248 | return (char*)node->content; |
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249 | } |
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250 | node = node->next; |
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251 | } |
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252 | return NULL; |
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253 | } |
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254 | |
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255 | |
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256 | char* util_base64decode(char *in) { |
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257 | int len = 0; |
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258 | return util_base64decode_len(in, &len); |
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259 | } |
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260 | |
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261 | char* util_base64decode_len(char* in, int *outlen) { |
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262 | size_t len = strlen(in); |
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263 | char *out = calloc(1, len); |
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264 | |
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265 | BIO* b = BIO_new_mem_buf(in, len); |
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266 | BIO *d = BIO_new(BIO_f_base64()); |
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267 | BIO_set_flags(d, BIO_FLAGS_BASE64_NO_NL); |
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268 | b = BIO_push(d, b); |
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269 | |
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270 | *outlen = BIO_read(b, out, len); |
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271 | BIO_free_all(b); |
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272 | |
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273 | return out; |
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274 | } |
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275 | |
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276 | char* util_base64encode(char *in, size_t len) { |
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277 | BIO *b; |
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278 | BIO *e; |
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279 | BUF_MEM *mem; |
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280 | |
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281 | e = BIO_new(BIO_f_base64()); |
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282 | b = BIO_new(BIO_s_mem()); |
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283 | |
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284 | e = BIO_push(e, b); |
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285 | BIO_write(e, in, len); |
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286 | BIO_flush(e); |
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287 | |
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288 | BIO_get_mem_ptr(e, &mem); |
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289 | char *out = malloc(mem->length); |
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290 | memcpy(out, mem->data, mem->length -1); |
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291 | out[mem->length - 1] = '\0'; |
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292 | |
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293 | BIO_free_all(e); |
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294 | |
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295 | return out; |
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296 | } |
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297 | |
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298 | char* util_encrypt_str(DavSession *sn, char *str, char *key) { |
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299 | DavKey *k = dav_context_get_key(sn->context, key); |
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300 | if(!k) { |
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301 | // TODO: session error |
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302 | return NULL; |
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303 | } |
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304 | |
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305 | char *enc_str = aes_encrypt(str, k); |
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306 | char *ret_str = dav_session_strdup(sn, enc_str); |
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307 | free(enc_str); |
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308 | return ret_str; |
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309 | } |
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310 | |
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311 | char* util_decrypt_str(DavSession *sn, char *str, char *key) { |
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312 | DavKey *k = dav_context_get_key(sn->context, key); |
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313 | if(!k) { |
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314 | // TODO: session error |
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315 | return NULL; |
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316 | } |
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317 | |
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318 | char *dec_str = aes_decrypt(str, k); |
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319 | char *ret_str = dav_session_strdup(sn, dec_str); |
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320 | free(dec_str); |
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321 | return ret_str; |
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322 | } |
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323 | |
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324 | char* util_random_str() { |
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325 | unsigned char *str = malloc(25); |
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326 | str[24] = '\0'; |
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327 | |
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328 | sstr_t t = S( |
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329 | "01234567890" |
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330 | "abcdefghijklmnopqrstuvwxyz" |
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331 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ"); |
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332 | const unsigned char *table = (const unsigned char*)t.ptr; |
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333 | |
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334 | RAND_pseudo_bytes(str, 24); |
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335 | for(int i=0;i<24;i++) { |
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336 | int c = str[i] % t.length; |
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337 | str[i] = table[c]; |
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338 | } |
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339 | |
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340 | return (char*)str; |
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341 | } |
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342 | |
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343 | /* |
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344 | * gets a substring from 0 to the appearance of the token |
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345 | * tokens are separated by space |
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346 | * sets sub to the substring and returns the remaining string |
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347 | */ |
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348 | sstr_t util_getsubstr_until_token(sstr_t str, sstr_t token, sstr_t *sub) { |
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349 | int i; |
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350 | int token_start = -1; |
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351 | int token_end = -1; |
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352 | for(i=0;i<=str.length;i++) { |
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353 | int c; |
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354 | if(i == str.length) { |
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355 | c = ' '; |
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356 | } else { |
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357 | c = str.ptr[i]; |
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358 | } |
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359 | if(c < 33) { |
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360 | if(token_start != -1) { |
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361 | token_end = i; |
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362 | size_t len = token_end - token_start; |
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363 | sstr_t tk = sstrsubsl(str, token_start, len); |
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364 | //printf("token: {%.*s}\n", token.length, token.ptr); |
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365 | if(!sstrcmp(tk, token)) { |
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366 | *sub = sstrtrim(sstrsubsl(str, 0, token_start)); |
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367 | break; |
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368 | } |
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369 | token_start = -1; |
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370 | token_end = -1; |
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371 | } |
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372 | } else { |
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373 | if(token_start == -1) { |
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374 | token_start = i; |
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375 | } |
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376 | } |
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377 | } |
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378 | |
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379 | if(i < str.length) { |
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380 | return sstrtrim(sstrsubs(str, i)); |
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381 | } else { |
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382 | str.ptr = NULL; |
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383 | str.length = 0; |
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384 | return str; |
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385 | } |
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386 | } |