src/server/safs/service.c

Sat, 12 Jan 2013 14:00:47 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 12 Jan 2013 14:00:47 +0100
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parent 44
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child 47
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cleaning up resources after requests

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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
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38 #include <sys/sendfile.h>
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39 #include "../util/strbuf.h"
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40
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41 #include <errno.h>
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42
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43 // TODO: system sendfile Abstraktionen in neue Datei auslagern
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44 /*
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45 ssize_t sys_sendfile(int out_fd, int in_fd, off_t *off, size_t len) {
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46
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47 }
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48 */
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49 #define sys_sendfile sendfile
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50
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51
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52 /*
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53 * prepares for servicing a file
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54 *
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55 * adds content-length header and starts the response
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56 *
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57 * return the file descriptor or -1
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58 */
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59 int prepare_service_file(Session *sn, Request *rq) {
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60 char *ppath = pblock_findkeyval(pb_key_ppath, rq->vars);
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61
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62 /* open the file */
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63 int fd = open(ppath, O_RDONLY);
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64 if(fd < 0) {
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65 perror("prepare_service_file: open");
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66
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67 int status = 500;
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68 int en = errno;
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69 switch(en) {
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70 case EACCES: {
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71 status = 403;
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72 break;
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73 }
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74 case ENOENT: {
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75 status = 404;
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76 break;
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77 }
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78 }
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79 protocol_status(sn, rq, status, NULL);
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80 return -1;
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81 }
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82
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83 /* get stat */
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84 struct stat stat;
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85 if (fstat(fd, &stat) != 0) {
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86 perror("prepare_service_file: stat");
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87
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88 protocol_status(sn, rq, 500, NULL);
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89 return -1;
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90 }
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91
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92 /* add content-length header*/
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93 char contentLength[32];
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94 int len = snprintf(contentLength, 32, "%d", stat.st_size);
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95
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96 pblock_kvinsert(pb_key_content_length, contentLength, len, rq->srvhdrs);
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97
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98 /* start response */
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99 protocol_status(sn, rq, 200, NULL);
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100 http_start_response(sn, rq);
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101
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102 return fd;
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103 }
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104
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105 int send_file(pblock *pb, Session *sn, Request *rq) {
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106 int fd = prepare_service_file(sn, rq);
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107 if(fd < 0) {
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108 // if an error occurs, prepare_service_file sets the http status code
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109 // we can just return REQ_ABORTED
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110 return REQ_ABORTED;
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111 }
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112
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113 /* send file*/
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114 SystemIOStream *io = (SystemIOStream*) sn->csd;
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115
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116 off_t fileoffset = 0;
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117 int len = atoi(pblock_findkeyval(pb_key_content_length, rq->srvhdrs));
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118 sendfile(io->fd, fd, &fileoffset, len);
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119
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120 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 int fd = open(ppath, O_RDONLY);
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145 if(fd < 0) {
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146 perror("service_index: open");
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147
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148 int status = 500;
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149 switch(errno) {
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150 case EACCES: {
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151 status = 403;
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152 break;
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153 }
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154 case ENOENT: {
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155 status = 404;
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156 break;
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157 }
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158 }
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159 protocol_status(sn, rq, status, NULL);
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160 printf("REQ_ABORTED\n");
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161 return REQ_ABORTED;
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162 }
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163
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164 DIR *dir = fdopendir(fd);
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165 if(dir == NULL) {
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166 protocol_status(sn, rq, 500, NULL);
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167 printf("DIR is null\n");
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168 return REQ_ABORTED;
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169 }
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170
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171 sbuf_t *out = sbuf_new(1024); /* output buffer */
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172
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173 /* write html header */
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174 sbuf_puts(out, "<html>\n<head>\n<title>Index of ");
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175 sbuf_puts(out, uri);
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176 sbuf_puts(out, "</title>\n</head><body>\n<h1>Index of ");
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177 sbuf_puts(out, uri);
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178 sbuf_puts(out, "</h1><hr>\n\n");
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179
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180 struct dirent *f;
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181 while((f = readdir(dir)) != NULL) {
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182 if(strcmp(f->d_name, ".") == 0 || strcmp(f->d_name, "..") == 0) {
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183 continue;
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184 }
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185
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186 sstr_t filename = sstr(f->d_name);
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187
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188 sbuf_puts(out, "<a href=\"");
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189 sbuf_append(out, r_uri);
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190 sbuf_append(out, filename);
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191 sbuf_puts(out, "\">");
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192 sbuf_append(out, filename);
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193 sbuf_puts(out, "</a><br>\n");
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194 }
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195
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196 sbuf_puts(out, "\n</body>\n</html>\n");
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197
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198 /* send stuff to client */
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199 pblock_removekey(pb_key_content_type, rq->srvhdrs);
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200 pblock_kvinsert(pb_key_content_type, "text/html", 9, rq->srvhdrs);
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201 pblock_nninsert("content-length", out->length, rq->srvhdrs);
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202 protocol_status(sn, rq, 200, NULL);
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203 http_start_response(sn, rq);
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204
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205 net_write(sn->csd, out->ptr, out->length);
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206
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207 /* close */
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208 closedir(dir);
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209
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210 return REQ_PROCEED;
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211 }
20
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212
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213 int send_options(pblock *pb, Session *sn, Request *rq) {
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214 char *allow = "HEAD, GET, PUT, DELETE, TRACE, OPTIONS, MOVE, COPY, "
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215 "PROPFIND, PROPPATCH, MKCOL, LOCK, UNLOCK, ACL, REPORT";
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216 char *dav = "1,2,access-control";
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217
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218 pblock_removekey(pb_key_content_type, rq->srvhdrs);
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219 pblock_nvinsert("allow", allow, rq->srvhdrs);
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220 pblock_nvinsert("dav", dav, rq->srvhdrs);
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221 pblock_nninsert("content-length", 0, rq->srvhdrs);
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222 protocol_status(sn, rq, 200, NULL);
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223 http_start_response(sn, rq);
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diff changeset
224
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225 return REQ_PROCEED;
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diff changeset
226 }

mercurial