src/server/safs/service.c

Sun, 26 May 2013 22:05:41 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 26 May 2013 22:05:41 +0200
changeset 67
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parent 59
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child 69
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dynamic thread pool

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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 2013 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 <sys/file.h>
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31 #include <sys/stat.h>
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32
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33 #include "service.h"
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34 #include "../util/io.h"
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35 #include "../util/pblock.h"
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36 #include "../daemon/protocol.h"
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37 #include "../daemon/vfs.h"
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38
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39 #include <sys/sendfile.h>
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40 #include "../util/strbuf.h"
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41
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42 #include <errno.h>
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43
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44
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45 /*
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46 * prepares for servicing a file
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47 *
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48 * adds content-length header and starts the response
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49 *
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50 * return the opened file
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51 */
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52 SYS_FILE prepare_service_file(Session *sn, Request *rq, struct stat *s) {
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53 char *ppath = pblock_findkeyval(pb_key_ppath, rq->vars);
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55 /* open the file */
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56 VFSContext *vfs = vfs_request_context(sn, rq);
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57 SYS_FILE fd = vfs_open(vfs, ppath, O_RDONLY);
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58 if(!fd) {
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59 // vfs_open sets http status code
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60 return NULL;
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61 }
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62
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63 /* get stat */
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64 if(vfs_fstat(vfs, fd, s) != 0) {
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65 //perror("prepare_service_file: stat");
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66 protocol_status(sn, rq, 500, NULL);
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67 return NULL;
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68 }
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70 // check if the file is a directory
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71 if(S_ISDIR(s->st_mode)) {
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72 pblock_nvinsert("content-length", "0", rq->srvhdrs);
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73 pblock_removekey(pb_key_content_type, rq->srvhdrs);
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74 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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75 size_t urilen = strlen(uri);
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76 char *location = pool_malloc(sn->pool, urilen + 2);
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77 memcpy(location, uri, urilen);
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78 location[urilen] = '/';
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79 location[urilen+1] = '\0';
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80 pblock_kvinsert(pb_key_location, location, urilen + 1, rq->srvhdrs);
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81 protocol_status(sn, rq, 302, NULL);
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82 http_start_response(sn, rq);
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83 vfs_close(fd);
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84 return fd;
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85 }
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86
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87 /* add content-length header*/
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88 char contentLength[32];
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89 int len = snprintf(contentLength, 32, "%d", s->st_size);
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90
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91 pblock_kvinsert(pb_key_content_length, contentLength, len, rq->srvhdrs);
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92
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93 /* start response */
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94 protocol_status(sn, rq, 200, NULL);
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95 http_start_response(sn, rq);
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96
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97 return fd;
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98 }
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99
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100 int send_file(pblock *pb, Session *sn, Request *rq) {
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101 struct stat s;
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102 SYS_FILE fd = prepare_service_file(sn, rq, &s);
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103 if(!fd) {
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104 // if an error occurs, prepare_service_file sets the http status code
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105 // we can just return REQ_ABORTED
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106 return REQ_ABORTED;
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107 }
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108
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109 if(!S_ISDIR(s.st_mode)) {
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110 // send file
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111 sendfiledata sfd;
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112 sfd.fd = fd;
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113 sfd.len = s.st_size;
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114 sfd.offset = 0;
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115 sfd.header = NULL;
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116 sfd.trailer = NULL;
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117 net_sendfile(sn->csd, &sfd);
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118 }
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119
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120 vfs_close(fd);
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121
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122 return REQ_PROCEED;
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123 }
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124
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125 int service_hello(pblock *pb, Session *sn, Request *rq) {
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126 pblock_removekey(pb_key_content_type, rq->srvhdrs);
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127 pblock_nvinsert("content-type", "text/plain", rq->srvhdrs);
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128 pblock_nninsert("content-length", 13, rq->srvhdrs);
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129 protocol_status(sn, rq, 200, NULL);
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130 http_start_response(sn, rq);
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131 net_write(sn->csd, "Hello World!\n", 13);
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132 return REQ_PROCEED;
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133 }
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134
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135 int service_index(pblock *pb, Session *sn, Request *rq) {
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136 //printf("service_index\n");
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137
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138 char *ppath = pblock_findkeyval(pb_key_ppath, rq->vars);
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139 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
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140
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141 sstr_t r_uri = sstr(uri);
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142
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143 /* open the file */
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144 VFSContext *vfs = vfs_request_context(sn, rq);
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145 VFS_DIR dir = vfs_opendir(vfs, ppath);
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146 if(!dir) {
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147 return REQ_ABORTED;
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148 }
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149
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150 sbuf_t *out = sbuf_new(1024); /* output buffer */
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151
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152 /* write html header */
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153 sbuf_puts(out, "<html>\n<head>\n<title>Index of ");
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154 sbuf_puts(out, uri);
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155 sbuf_puts(out, "</title>\n</head><body>\n<h1>Index of ");
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156 sbuf_puts(out, uri);
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157 sbuf_puts(out, "</h1><hr>\n\n");
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158
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159 //struct dirent *f;
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160 VFS_ENTRY f;
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161 while(vfs_readdir(dir, &f)) {
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162 sstr_t filename = sstr(f.name);
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163
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164 sbuf_puts(out, "<a href=\"");
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165 sbuf_append(out, r_uri);
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166 sbuf_append(out, filename);
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167 sbuf_puts(out, "\">");
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168 sbuf_append(out, filename);
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169 sbuf_puts(out, "</a><br>\n");
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170 }
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171
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172 sbuf_puts(out, "\n</body>\n</html>\n");
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173
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174 /* send stuff to client */
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175 pblock_removekey(pb_key_content_type, rq->srvhdrs);
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176 pblock_kvinsert(pb_key_content_type, "text/html", 9, rq->srvhdrs);
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177 pblock_nninsert("content-length", out->length, rq->srvhdrs);
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178 protocol_status(sn, rq, 200, NULL);
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179 http_start_response(sn, rq);
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180
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181 net_write(sn->csd, out->ptr, out->length);
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182
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183 /* close */
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184 vfs_closedir(dir);
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185 sbuf_free(out);
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186
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187 return REQ_PROCEED;
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188 }
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189
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190 int send_options(pblock *pb, Session *sn, Request *rq) {
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191 char *allow = "HEAD, GET, PUT, DELETE, TRACE, OPTIONS, MOVE, COPY, "
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192 "PROPFIND, PROPPATCH, MKCOL, LOCK, UNLOCK, ACL, REPORT";
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193 char *dav = "1,2,access-control";
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194
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195 pblock_removekey(pb_key_content_type, rq->srvhdrs);
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196 pblock_nvinsert("allow", allow, rq->srvhdrs);
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197 pblock_nvinsert("dav", dav, rq->srvhdrs);
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198 pblock_nninsert("content-length", 0, rq->srvhdrs);
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199 protocol_status(sn, rq, 200, NULL);
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200 http_start_response(sn, rq);
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201
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202 return REQ_PROCEED;
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203 }

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