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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 2018 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 <stdio.h> |
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30 | #include <stdlib.h> |
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31 | #include <string.h> |
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32 | |
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33 | #include <ucx/buffer.h> |
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34 | #include <ucx/utils.h> |
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35 | |
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36 | #include "utils.h" |
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37 | #include "session.h" |
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38 | #include "resource.h" |
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39 | #include "methods.h" |
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40 | |
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41 | DavSession* dav_session_new(DavContext *context, char *base_url) { |
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42 | if(!base_url) { |
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43 | return NULL; |
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44 | } |
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45 | sstr_t url = sstr(base_url); |
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46 | if(url.length == 0) { |
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47 | return NULL; |
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48 | } |
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49 | DavSession *sn = malloc(sizeof(DavSession)); |
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50 | memset(sn, 0, sizeof(DavSession)); |
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51 | sn->mp = ucx_mempool_new(DAV_SESSION_MEMPOOL_SIZE); |
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52 | sn->pathcache = ucx_map_new_a(sn->mp->allocator, DAV_PATH_CACHE_SIZE); |
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53 | sn->key = NULL; |
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54 | sn->errorstr = NULL; |
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55 | sn->error = DAV_OK; |
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56 | sn->flags = 0; |
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57 | if(url.ptr[url.length - 1] == '/') { |
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58 | sstr_t url = sstrdup_a(sn->mp->allocator, sstr(base_url)); |
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59 | sn->base_url = url.ptr; |
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60 | } else { |
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61 | char *url_str = ucx_mempool_malloc(sn->mp, url.length + 2); |
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62 | memcpy(url_str, base_url, url.length); |
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63 | url_str[url.length] = '/'; |
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64 | url_str[url.length + 1] = '\0'; |
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65 | sn->base_url = url_str; |
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66 | } |
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67 | sn->handle = curl_easy_init(); |
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68 | curl_easy_setopt(sn->handle, CURLOPT_FOLLOWLOCATION, 1L); |
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69 | |
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70 | // create lock manager |
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71 | DavLockManager *locks = ucx_mempool_malloc(sn->mp, sizeof(DavLockManager)); |
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72 | locks->resource_locks = ucx_map_new_a(sn->mp->allocator, 16); |
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73 | locks->collection_locks = NULL; |
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74 | sn->locks = locks; |
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75 | |
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76 | // set proxy |
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77 | DavProxy *proxy = sstrprefix(url, S("https")) ? context->https_proxy |
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78 | : context->http_proxy; |
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79 | |
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80 | if (proxy->url) { |
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81 | curl_easy_setopt(sn->handle, CURLOPT_PROXY, proxy->url); |
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82 | if (proxy->username) { |
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83 | curl_easy_setopt(sn->handle, CURLOPT_PROXYUSERNAME, |
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84 | proxy->username); |
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85 | if (proxy->password) { |
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86 | curl_easy_setopt(sn->handle, CURLOPT_PROXYPASSWORD, |
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87 | proxy->password); |
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88 | } else { |
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89 | // TODO: prompt |
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90 | } |
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91 | } |
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92 | if(proxy->no_proxy) { |
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93 | curl_easy_setopt(sn->handle, CURLOPT_NOPROXY, |
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94 | proxy->no_proxy); |
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95 | } |
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96 | } |
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97 | |
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98 | // set url |
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99 | #if LIBCURL_VERSION_NUM >= 0x072D00 |
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100 | curl_easy_setopt(sn->handle, CURLOPT_DEFAULT_PROTOCOL, "http"); |
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101 | #endif |
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102 | curl_easy_setopt(sn->handle, CURLOPT_URL, base_url); |
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103 | |
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104 | // add to context |
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105 | context->sessions = ucx_list_append(context->sessions, sn); |
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106 | sn->context = context; |
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107 | |
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108 | return sn; |
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109 | } |
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110 | |
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111 | DavSession* dav_session_new_auth( |
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112 | DavContext *context, |
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113 | char *base_url, |
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114 | char *user, |
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115 | char *password) |
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116 | { |
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117 | DavSession *sn = dav_session_new(context, base_url); |
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118 | if(!sn) { |
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119 | return NULL; |
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120 | } |
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121 | dav_session_set_auth(sn, user, password); |
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122 | return sn; |
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123 | } |
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124 | |
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125 | void dav_session_set_auth(DavSession *sn, char *user, char *password) { |
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126 | if(user && password) { |
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127 | size_t ulen = strlen(user); |
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128 | size_t plen = strlen(password); |
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129 | size_t upwdlen = ulen + plen + 2; |
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130 | char *upwdbuf = malloc(upwdlen); |
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131 | snprintf(upwdbuf, upwdlen, "%s:%s", user, password); |
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132 | curl_easy_setopt(sn->handle, CURLOPT_USERPWD, upwdbuf); |
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133 | free(upwdbuf); |
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134 | } |
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135 | } |
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136 | |
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137 | void dav_session_enable_encryption(DavSession *sn, DavKey *key, int flags) { |
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138 | sn->key = key; |
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139 | // TODO: review sanity |
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140 | if(flags != 0) { |
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141 | sn->flags |= flags; |
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142 | } else { |
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143 | sn->flags |= DAV_SESSION_ENCRYPT_CONTENT; |
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144 | } |
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145 | } |
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146 | |
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147 | void dav_session_set_authcallback(DavSession *sn, dav_auth_func func, void *userdata) { |
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148 | sn->auth_prompt = func; |
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149 | sn->authprompt_userdata = userdata; |
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150 | } |
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151 | |
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152 | void dav_session_set_progresscallback(DavSession *sn, dav_progress_func get, dav_progress_func put, void *userdata) { |
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153 | sn->get_progress = get; |
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154 | sn->put_progress = put; |
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155 | sn->progress_userdata = userdata; |
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156 | } |
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157 | |
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158 | CURLcode dav_session_curl_perform(DavSession *sn, long *status) { |
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159 | return dav_session_curl_perform_buf(sn, NULL, NULL, status); |
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160 | } |
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161 | |
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162 | CURLcode dav_session_curl_perform_buf(DavSession *sn, UcxBuffer *request, UcxBuffer *response, long *status) { |
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163 | CURLcode ret = curl_easy_perform(sn->handle); |
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164 | long http_status; |
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165 | curl_easy_getinfo(sn->handle, CURLINFO_RESPONSE_CODE, &http_status); |
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166 | if(ret == CURLE_OK && http_status == 401 && sn->auth_prompt) { |
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167 | if(!sn->auth_prompt(sn, sn->authprompt_userdata)) { |
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168 | if(request) { |
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169 | ucx_buffer_seek(request, 0, SEEK_SET); |
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170 | } |
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171 | if(response) { |
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172 | ucx_buffer_seek(response, 0, SEEK_SET); |
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173 | } |
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174 | ret = curl_easy_perform(sn->handle); |
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175 | curl_easy_getinfo(sn->handle, CURLINFO_RESPONSE_CODE, &http_status); |
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176 | } |
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177 | } |
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178 | if(status) { |
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179 | *status = http_status; |
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180 | } |
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181 | return ret; |
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182 | } |
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183 | |
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184 | int dav_session_get_progress(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow) { |
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185 | DavResource *res = clientp; |
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186 | DavSession *sn = res->session; |
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187 | if(sn->get_progress) { |
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188 | sn->get_progress(res, (int64_t)dltotal, (int64_t)dlnow, sn->progress_userdata); |
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189 | } |
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190 | return 0; |
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191 | } |
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192 | |
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193 | int dav_session_put_progress(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow) { |
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194 | DavResource *res = clientp; |
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195 | DavSession *sn = res->session; |
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196 | if(sn->put_progress) { |
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197 | sn->put_progress(res, (int64_t)ultotal, (int64_t)ulnow, sn->progress_userdata); |
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198 | } |
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199 | return 0; |
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200 | } |
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201 | |
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202 | void dav_session_set_error(DavSession *sn, CURLcode c, int status) { |
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203 | if(status > 0) { |
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204 | switch(status) { |
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205 | default: { |
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206 | switch(c) { |
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207 | default: sn->error = DAV_ERROR; |
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208 | } |
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209 | break; |
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210 | } |
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211 | case 401: sn->error = DAV_UNAUTHORIZED; break; |
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212 | case 403: sn->error = DAV_FORBIDDEN; break; |
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213 | case 404: sn->error = DAV_NOT_FOUND; break; |
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214 | case 405: sn->error = DAV_METHOD_NOT_ALLOWED; break; |
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215 | case 407: sn->error = DAV_PROXY_AUTH_REQUIRED; break; |
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216 | case 409: sn->error = DAV_CONFLICT; break; |
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217 | case 413: sn->error = DAV_REQUEST_ENTITY_TOO_LARGE; break; |
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218 | case 414: sn->error = DAV_REQUEST_URL_TOO_LONG; break; |
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219 | case 423: sn->error = DAV_LOCKED; break; |
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220 | case 511: sn->error = DAV_NET_AUTH_REQUIRED; break; |
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221 | } |
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222 | } else { |
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223 | switch(c) { |
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224 | case CURLE_UNSUPPORTED_PROTOCOL: sn->error = DAV_UNSUPPORTED_PROTOCOL; break; |
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225 | case CURLE_COULDNT_RESOLVE_PROXY: sn->error = DAV_COULDNT_RESOLVE_PROXY; break; |
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226 | case CURLE_COULDNT_RESOLVE_HOST: sn->error = DAV_COULDNT_RESOLVE_HOST; break; |
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227 | case CURLE_COULDNT_CONNECT: sn->error = DAV_COULDNT_CONNECT; break; |
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228 | case CURLE_OPERATION_TIMEDOUT: sn->error = DAV_TIMEOUT; break; |
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229 | case CURLE_SSL_CONNECT_ERROR: |
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230 | case CURLE_PEER_FAILED_VERIFICATION: |
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231 | case CURLE_SSL_ENGINE_NOTFOUND: |
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232 | case CURLE_SSL_ENGINE_SETFAILED: |
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233 | case CURLE_SSL_CERTPROBLEM: |
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234 | case CURLE_SSL_CIPHER: |
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235 | case CURLE_SSL_CACERT: |
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236 | case CURLE_SSL_CACERT_BADFILE: |
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237 | case CURLE_SSL_SHUTDOWN_FAILED: |
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238 | case CURLE_SSL_CRL_BADFILE: |
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239 | case CURLE_SSL_ISSUER_ERROR: sn->error = DAV_SSL_ERROR; break; |
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240 | default: sn->error = DAV_ERROR; break; |
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241 | } |
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242 | } |
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243 | if(c != CURLE_OK) { |
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244 | dav_session_set_errstr(sn, curl_easy_strerror(c)); |
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245 | } else { |
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246 | dav_session_set_errstr(sn, NULL); |
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247 | } |
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248 | } |
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249 | |
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250 | void dav_session_set_errstr(DavSession *sn, const char *str) { |
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251 | if(sn->errorstr) { |
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252 | dav_session_free(sn, sn->errorstr); |
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253 | } |
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254 | char *errstr = NULL; |
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255 | if(str) { |
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256 | errstr = dav_session_strdup(sn, str); |
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257 | } |
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258 | sn->errorstr = errstr; |
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259 | } |
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260 | |
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261 | void dav_session_destroy(DavSession *sn) { |
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262 | // remove session from context |
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263 | UcxList *sessions = sn->context->sessions; |
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264 | ssize_t i = ucx_list_find(sessions, sn, ucx_ptrcmp, NULL); |
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265 | if(i >= 0) { |
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266 | UcxList *elm = ucx_list_get(sessions, i); |
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267 | if(elm) { |
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268 | sn->context->sessions = ucx_list_remove(sessions, elm); |
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269 | } |
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270 | } |
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271 | |
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272 | ucx_mempool_destroy(sn->mp); |
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273 | curl_easy_cleanup(sn->handle); |
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274 | free(sn); |
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275 | } |
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276 | |
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277 | |
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278 | void* dav_session_malloc(DavSession *sn, size_t size) { |
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279 | return ucx_mempool_malloc(sn->mp, size); |
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280 | } |
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281 | |
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282 | void* dav_session_calloc(DavSession *sn, size_t nelm, size_t size) { |
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283 | return ucx_mempool_calloc(sn->mp, nelm, size); |
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284 | } |
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285 | |
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286 | void* dav_session_realloc(DavSession *sn, void *ptr, size_t size) { |
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287 | return ucx_mempool_realloc(sn->mp, ptr, size); |
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288 | } |
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289 | |
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290 | void dav_session_free(DavSession *sn, void *ptr) { |
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291 | ucx_mempool_free(sn->mp, ptr); |
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292 | } |
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293 | |
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294 | char* dav_session_strdup(DavSession *sn, const char *str) { |
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295 | return sstrdup_a(sn->mp->allocator, sstr((char*)str)).ptr; |
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296 | } |
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297 | |
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298 | |
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299 | char* dav_session_create_plain_href(DavSession *sn, char *path) { |
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300 | if(!DAV_ENCRYPT_NAME(sn) && !DAV_DECRYPT_NAME(sn)) { |
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301 | // non encrypted file names |
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302 | char *url = util_path_to_url(sn, path); |
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303 | char *href = dav_session_strdup(sn, util_url_path(url)); |
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304 | free(url); |
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305 | return href; |
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306 | } else { |
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307 | return NULL; |
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308 | } |
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309 | } |
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310 | |
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311 | char* dav_session_get_href(DavSession *sn, char *path) { |
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312 | if(DAV_DECRYPT_NAME(sn) || DAV_ENCRYPT_NAME(sn)) { |
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313 | sstr_t p = sstr(path); |
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314 | UcxBuffer *href = ucx_buffer_new(NULL, 256, UCX_BUFFER_AUTOEXTEND); |
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315 | UcxBuffer *pbuf = ucx_buffer_new(NULL, 256, UCX_BUFFER_AUTOEXTEND); |
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316 | int start = 0; |
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317 | int begin = 0; |
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318 | |
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319 | // check path cache |
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320 | char *cp = strdup(path); |
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321 | //printf("cp: %s\n", cp); |
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322 | while(strlen(cp) > 1) { |
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323 | char *cached = ucx_map_cstr_get(sn->pathcache, cp); |
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324 | if(cached) { |
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325 | start = strlen(cp); |
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326 | begin = start; |
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327 | ucx_buffer_puts(href, cached); |
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328 | break; |
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329 | } else { |
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330 | // check, if the parent path is cached |
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331 | char *f = cp; |
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332 | cp = util_parent_path(cp); |
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333 | free(f); |
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334 | } |
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335 | } |
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336 | free(cp); |
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337 | if(href->pos == 0) { |
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338 | // if there are no cached elements we have to add the base url path |
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339 | // to the href buffer |
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340 | ucx_buffer_puts(href, util_url_path(sn->base_url)); |
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341 | } |
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342 | |
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343 | // create resource for name lookup |
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344 | sstr_t rp = sstrdup(sstrn(path, start)); |
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345 | DavResource *root = dav_resource_new(sn, rp.ptr); |
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346 | free(rp.ptr); |
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347 | resource_set_href(root, sstrn(href->space, href->pos)); |
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348 | |
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349 | // create request buffer for propfind requests |
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350 | UcxBuffer *rqbuf = create_basic_propfind_request(); |
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351 | |
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352 | sstr_t remaining = sstrsubs(p, start); |
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353 | ssize_t nelm = 0; |
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354 | sstr_t *elms = sstrsplit(remaining, S("/"), &nelm); |
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355 | DavResource *res = root; |
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356 | ucx_buffer_puts(pbuf, res->path); |
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357 | // iterate over all remaining path elements |
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358 | for(int i=0;i<nelm;i++) { |
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359 | sstr_t elm = elms[i]; |
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360 | if(elm.length > 0) { |
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361 | //printf("elm: %.*s\n", elm.length, elm.ptr); |
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362 | DavResource *child = dav_find_child(sn, res, rqbuf, elm.ptr); |
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363 | |
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364 | // if necessary add a path separator |
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365 | if(pbuf->space[pbuf->pos-1] != '/') { |
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366 | if(href->space[href->pos-1] != '/') { |
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367 | ucx_buffer_putc(href, '/'); |
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368 | } |
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369 | ucx_buffer_putc(pbuf, '/'); |
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370 | } |
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371 | // add last path/href to the cache |
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372 | sstr_t pp = sstrn(pbuf->space, pbuf->size); |
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373 | sstr_t hh = sstrn(href->space, href->size); |
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374 | dav_session_cache_path(sn, pp, hh); |
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375 | |
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376 | ucx_buffer_write(elm.ptr, 1, elm.length, pbuf); |
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377 | if(child) { |
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378 | ucx_buffer_puts(href, util_resource_name(child->href)); |
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379 | res = child; |
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380 | } else { |
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381 | //printf("random\n"); |
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382 | char *random_name = util_random_str(); |
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383 | ucx_buffer_puts(href, random_name); |
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384 | free(random_name); |
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385 | } |
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386 | } |
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387 | |
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388 | // cleanup |
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389 | free(elm.ptr); |
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390 | } |
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391 | free(elms); |
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392 | |
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393 | // if necessary add a path separator |
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394 | if(p.ptr[p.length-1] == '/') { |
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395 | if(href->space[href->pos-1] != '/') { |
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396 | ucx_buffer_putc(href, '/'); |
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397 | } |
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398 | ucx_buffer_putc(pbuf, '/'); |
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399 | } |
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400 | // add the final path to the cache |
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401 | sstr_t pp = sstrn(pbuf->space, pbuf->size); |
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402 | sstr_t hh = sstrn(href->space, href->size); |
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403 | dav_session_cache_path(sn, pp, hh); |
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404 | |
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405 | sstr_t href_str = sstrdup_a( |
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406 | sn->mp->allocator, |
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407 | sstrn(href->space, |
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408 | href->size)); |
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409 | |
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410 | // cleanup |
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411 | dav_resource_free_all(root); |
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412 | ucx_buffer_free(rqbuf); |
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413 | ucx_buffer_free(pbuf); |
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414 | ucx_buffer_free(href); |
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415 | |
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416 | return href_str.ptr; |
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417 | } else { |
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418 | return dav_session_create_plain_href(sn, path); |
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419 | } |
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420 | } |
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421 | |
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422 | DavResource* dav_find_child(DavSession *sn, DavResource *res, UcxBuffer *rqbuf, char *name) { |
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423 | if(res && !dav_propfind(sn, res, rqbuf)) { |
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424 | DavResource *child = res->children; |
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425 | while(child) { |
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426 | if(!strcmp(child->name, name)) { |
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427 | return child; |
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428 | } |
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429 | child = child->next; |
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430 | } |
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431 | } |
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432 | return NULL; |
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433 | } |
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434 | |
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435 | void dav_session_cache_path(DavSession *sn, sstr_t path, sstr_t href) { |
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436 | char *elm = ucx_map_sstr_get(sn->pathcache, path); |
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437 | if(!elm) { |
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438 | href = sstrdup_a(sn->mp->allocator, href); |
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439 | ucx_map_sstr_put(sn->pathcache, path, href.ptr); |
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440 | } |
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441 | } |
208
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442 | |
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443 | |
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444 | DavLock* dav_create_lock(DavSession *sn, char *token, char *timeout) { |
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445 | DavLock *lock = dav_session_malloc(sn, sizeof(DavLock)); |
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446 | lock->path = NULL; |
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447 | lock->token = dav_session_strdup(sn, token); |
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448 | |
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449 | // TODO: timeout |
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450 | |
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451 | return lock; |
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452 | } |
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453 | |
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454 | void dav_destroy_lock(DavSession *sn, DavLock *lock) { |
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455 | dav_session_free(sn, lock->token); |
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456 | if(lock->path) { |
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457 | dav_session_free(sn, lock->path); |
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458 | } |
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459 | dav_session_free(sn, lock); |
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460 | } |
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461 | |
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462 | int dav_add_resource_lock(DavSession *sn, char *path, DavLock *lock) { |
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463 | DavLockManager *locks = sn->locks; |
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464 | if(ucx_map_cstr_get(locks->resource_locks, path)) { |
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465 | return -1; |
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466 | } |
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467 | |
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468 | ucx_map_cstr_put(locks->resource_locks, path, lock); |
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469 | return 0; |
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470 | } |
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471 | |
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472 | static void insert_lock(DavSession *sn, UcxList *elm, UcxList *newelm) { |
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473 | UcxList *next = elm->next; |
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474 | if(next) { |
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475 | next->prev = newelm; |
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476 | newelm->next = next; |
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477 | } |
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478 | newelm->prev = elm; |
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479 | elm->next = newelm; |
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480 | } |
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481 | |
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482 | int dav_add_collection_lock(DavSession *sn, char *path, DavLock *lock) { |
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483 | DavLockManager *locks = sn->locks; |
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484 | if(!locks->collection_locks) { |
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485 | locks->collection_locks = ucx_list_append_a( |
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486 | sn->mp->allocator, |
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487 | NULL, |
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488 | lock); |
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489 | lock->path = dav_session_strdup(sn, path); |
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490 | return 0; |
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491 | } |
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492 | |
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493 | UcxList *elm = locks->collection_locks; |
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494 | for(;;) { |
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495 | DavLock *l = elm->data; |
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496 | int cmp = strcmp(path, l->path); |
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497 | if(cmp > 0) { |
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498 | UcxList *newelm = ucx_list_append_a(sn->mp->allocator, NULL, lock); |
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499 | lock->path = dav_session_strdup(sn, path); |
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500 | insert_lock(sn, elm, newelm); |
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501 | } else if(cmp == 0) { |
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502 | return -1; |
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503 | } |
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504 | |
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505 | if(elm->next) { |
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506 | elm = elm->next; |
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507 | } else { |
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508 | UcxList *newelm = ucx_list_append_a(sn->mp->allocator, NULL, lock); |
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509 | lock->path = dav_session_strdup(sn, path); |
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510 | ucx_list_concat(elm, newelm); |
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511 | break; |
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512 | } |
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513 | } |
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514 | |
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515 | return 0; |
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516 | } |
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517 | |
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518 | DavLock* dav_get_lock(DavSession *sn, char *path) { |
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519 | DavLockManager *locks = sn->locks; |
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520 | |
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521 | DavLock *lock = ucx_map_cstr_get(locks->resource_locks, path); |
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522 | if(lock) { |
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523 | return lock; |
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524 | } |
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525 | |
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526 | sstr_t p = sstr(path); |
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527 | UCX_FOREACH(elm, locks->collection_locks) { |
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528 | DavLock *cl = elm->data; |
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529 | int cmd = strcmp(path, cl->path); |
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530 | if(cmd == 0) { |
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531 | return cl; |
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532 | } else if(sstrprefix(p, sstr(cl->path))) { |
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533 | return cl; |
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534 | } else if(cmd > 0) { |
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535 | break; |
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536 | } |
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537 | } |
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538 | |
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539 | return NULL; |
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540 | } |
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541 | |
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542 | void dav_remove_lock(DavSession *sn, char *path, DavLock *lock) { |
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543 | DavLockManager *locks = sn->locks; |
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544 | |
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545 | if(ucx_map_cstr_remove(locks->resource_locks, path)) { |
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546 | return; |
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547 | } |
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548 | |
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549 | UcxList *rm = NULL; |
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550 | UCX_FOREACH(elm, locks->collection_locks) { |
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551 | DavLock *cl = elm->data; |
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552 | if(cl == lock) { |
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553 | rm = elm; |
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554 | break; |
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555 | } |
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556 | } |
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557 | |
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558 | if(rm) { |
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559 | locks->collection_locks = ucx_list_remove_a( |
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560 | sn->mp->allocator, |
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561 | locks->collection_locks, |
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562 | rm); |
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563 | } |
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564 | } |