Mercurial > paster
annotate http.c @ 1:836a698946f8
pasterd: add basic routes
author | David Demelier <markand@malikania.fr> |
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date | Tue, 04 Feb 2020 16:44:43 +0100 |
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children | 65607ae124b1 |
rev | line source |
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1 /* |
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2 * http.c -- HTTP parsing and rendering |
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3 * |
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr> |
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5 * |
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6 * Permission to use, copy, modify, and/or distribute this software for any |
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7 * purpose with or without fee is hereby granted, provided that the above |
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8 * copyright notice and this permission notice appear in all copies. |
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9 * |
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 */ |
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18 |
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19 #include <sys/types.h> |
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20 #include <assert.h> |
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21 #include <limits.h> |
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22 #include <stdarg.h> |
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23 #include <stdint.h> |
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24 #include <stdio.h> |
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25 #include <stdlib.h> |
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26 #include <unistd.h> |
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27 |
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28 #include <kcgi.h> |
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29 |
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30 #include "config.h" |
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31 #include "database.h" |
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32 #include "http.h" |
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33 #include "log.h" |
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34 #include "paste.h" |
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35 #include "util.h" |
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36 |
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37 static void page_index(struct kreq *); |
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38 static void page_new(struct kreq *); |
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39 static void page_fork(struct kreq *); |
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40 static void page_paste(struct kreq *); |
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41 static void page_about(struct kreq *); |
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42 static void page_download(struct kreq *); |
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43 |
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44 enum page { |
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45 PAGE_INDEX, |
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46 PAGE_NEW, |
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47 PAGE_FORK, |
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48 PAGE_PASTE, |
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49 PAGE_ABOUT, |
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50 PAGE_DOWNLOAD, |
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51 PAGE_LAST /* Not used. */ |
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52 }; |
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53 |
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54 static const char *pages[] = { |
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55 [PAGE_INDEX] = "", |
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56 [PAGE_NEW] = "new", |
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57 [PAGE_FORK] = "fork", |
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58 [PAGE_PASTE] = "paste", |
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59 [PAGE_ABOUT] = "about", |
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60 [PAGE_DOWNLOAD] = "download", |
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61 }; |
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62 |
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63 static void (*handlers[])(struct kreq *req) = { |
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64 [PAGE_INDEX] = page_index, |
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65 [PAGE_NEW] = page_new, |
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66 [PAGE_FORK] = page_fork, |
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67 [PAGE_PASTE] = page_paste, |
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68 [PAGE_ABOUT] = page_about, |
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69 [PAGE_DOWNLOAD] = page_download |
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70 }; |
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71 |
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72 struct tmpl_index { |
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73 struct kreq *req; |
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74 struct paste pastes[10]; |
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75 size_t count; |
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76 size_t current; |
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77 }; |
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78 |
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79 struct tmpl_paste { |
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80 struct kreq *req; |
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81 struct paste paste; |
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82 }; |
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83 |
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84 static const char * |
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85 template(const char *filename) |
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86 { |
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87 /* Build path to the template file. */ |
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88 static char path[PATH_MAX]; |
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89 |
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90 snprintf(path, sizeof (path), "%s/%s", config.themedir, filename); |
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91 |
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92 return path; |
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93 } |
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94 |
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95 static int |
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96 tmpl_paste(size_t index, void *arg) |
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97 { |
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98 struct tmpl_paste *data = arg; |
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99 struct paste *paste = &data->paste; |
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100 |
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101 switch (index) { |
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102 case 0: |
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103 khttp_puts(data->req, paste->uuid); |
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104 break; |
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105 case 1: |
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106 khttp_puts(data->req, paste->title); |
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107 break; |
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108 case 2: |
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109 khttp_puts(data->req, paste->author); |
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110 break; |
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111 case 3: |
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112 khttp_puts(data->req, paste->language); |
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113 break; |
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114 case 4: |
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115 khttp_puts(data->req, paste->code); |
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116 break; |
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117 case 5: |
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118 /* TODO: timestamp here. */ |
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119 khttp_puts(data->req, "TODO"); |
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120 break; |
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121 case 6: |
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122 khttp_puts(data->req, bprintf("%s", paste->visible ? "Yes" : "No")); |
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123 break; |
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124 case 7: |
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125 /* TODO: convert time left. */ |
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126 khttp_puts(data->req, "TODO"); |
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127 break; |
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128 default: |
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129 break; |
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130 } |
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131 |
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132 return true; |
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133 } |
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134 |
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135 static int |
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136 tmpl_index_pastes(size_t index, void *arg) |
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137 { |
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138 struct tmpl_index *data = arg; |
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139 struct paste *paste = &data->pastes[data->current]; |
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140 |
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141 switch (index) { |
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142 case 0: |
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143 khttp_puts(data->req, paste->uuid); |
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144 break; |
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145 case 1: |
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146 khttp_puts(data->req, paste->title); |
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147 break; |
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148 case 2: |
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149 khttp_puts(data->req, paste->author); |
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150 break; |
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151 case 3: |
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152 khttp_puts(data->req, paste->language); |
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153 break; |
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154 case 4: |
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155 khttp_puts(data->req, bprintf("%d", paste->duration)); |
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156 break; |
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157 default: |
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158 break; |
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159 } |
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160 |
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161 return true; |
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162 } |
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163 |
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164 static int |
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165 tmpl_index(size_t index, void *arg) |
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166 { |
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167 /* No check, only one index. */ |
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168 struct tmpl_index *data = arg; |
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169 const char *keywords[] = { |
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170 "uuid", |
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171 "name", |
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172 "author", |
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173 "language", |
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174 "expiration" |
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175 }; |
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176 struct ktemplate kt = { |
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177 .key = keywords, |
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178 .keysz = 5, |
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179 .arg = data, |
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180 .cb = tmpl_index_pastes |
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181 }; |
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182 |
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183 for (size_t i = 0; i < data->count; ++i) { |
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184 khttp_template(data->req, &kt, template("index-paste.html")); |
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185 data->current++; |
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186 } |
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187 |
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188 return true; |
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189 } |
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190 |
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191 static void |
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192 header(struct kreq *req) |
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193 { |
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194 khttp_template(req, NULL, template("header.html")); |
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195 } |
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196 |
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197 static void |
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198 footer(struct kreq *req) |
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199 { |
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200 khttp_template(req, NULL, template("footer.html")); |
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201 } |
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202 |
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203 static void |
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204 page_index(struct kreq *req) |
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205 { |
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206 struct tmpl_index data = { |
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207 .req = req, |
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208 .count = 10 |
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209 }; |
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210 |
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211 khttp_head(req, kresps[KRESP_CONTENT_TYPE], "%s", kmimetypes[KMIME_TEXT_HTML]); |
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212 |
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213 if (!database_recents(data.pastes, &data.count)) { |
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214 khttp_head(req, kresps[KRESP_STATUS], "%s", khttps[KHTTP_500]); |
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215 khttp_body(req); |
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216 khttp_template(req, NULL, template("500.html")); |
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217 } else { |
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218 const char *keywords[] = { "pastes" }; |
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219 struct ktemplate kt = { |
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220 .key = keywords, |
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221 .keysz = 1, |
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222 .arg = &data, |
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223 .cb = tmpl_index |
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224 }; |
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225 |
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226 khttp_head(req, kresps[KRESP_STATUS], "%s", khttps[KHTTP_200]); |
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227 khttp_body(req); |
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228 header(req); |
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229 khttp_template(req, &kt, template("index.html")); |
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230 footer(req); |
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231 } |
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232 |
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233 khttp_free(req); |
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234 } |
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235 |
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236 static void |
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237 page_new(struct kreq *req) |
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238 { |
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239 (void)req; |
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240 } |
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241 |
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242 static void |
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243 page_fork(struct kreq *req) |
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244 { |
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245 (void)req; |
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246 } |
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247 |
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248 static void |
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249 page_paste(struct kreq *req) |
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250 { |
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251 struct tmpl_paste data = { |
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252 .req = req |
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253 }; |
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254 |
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255 khttp_head(req, kresps[KRESP_CONTENT_TYPE], "%s", kmimetypes[KMIME_TEXT_HTML]); |
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256 |
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257 if (!database_get(&data.paste, req->path)) { |
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258 khttp_head(req, kresps[KRESP_STATUS], "%s", khttps[KHTTP_404]); |
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259 khttp_body(req); |
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260 khttp_template(req, NULL, template("404.html")); |
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261 } else { |
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262 const char *keywords[] = { |
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263 "uuid", |
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264 "title", |
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265 "author", |
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266 "language", |
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267 "code", |
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268 "timestamp", |
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269 "visible", |
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270 "duration" |
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271 }; |
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272 const struct ktemplate kt = { |
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273 .key = keywords, |
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274 .keysz = 8, |
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275 .cb = tmpl_paste, |
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276 .arg = &data |
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277 }; |
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278 |
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279 khttp_head(req, kresps[KRESP_STATUS], "%s", khttps[KHTTP_200]); |
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280 khttp_body(req); |
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281 header(req); |
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282 khttp_template(req, &kt, template("paste.html")); |
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283 footer(req); |
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284 khttp_free(req); |
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285 } |
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286 } |
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287 |
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288 static void |
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289 page_about(struct kreq *req) |
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290 { |
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291 (void)req; |
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292 } |
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293 |
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294 static void |
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295 page_download(struct kreq *req) |
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296 { |
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297 (void)req; |
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298 } |
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299 |
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300 static void |
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301 process(struct kreq *req) |
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302 { |
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303 assert(req); |
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304 |
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305 handlers[req->page](req); |
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306 } |
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307 |
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308 void |
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309 http_fcgi_run(void) |
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310 { |
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311 struct kreq req; |
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312 struct kfcgi *fcgi; |
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313 |
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314 if (khttp_fcgi_init(&fcgi, NULL, 0, pages, PAGE_LAST, 0) != KCGI_OK) |
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315 return; |
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316 |
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317 while (khttp_fcgi_parse(fcgi, &req) == KCGI_OK) |
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318 process(&req); |
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319 |
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320 khttp_fcgi_free(fcgi); |
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321 } |
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322 |
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323 void |
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324 http_cgi_run(void) |
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325 { |
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326 struct kreq req; |
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327 |
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328 if (khttp_parse(&req, NULL, 0, pages, PAGE_LAST, 0) == KCGI_OK) |
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329 process(&req); |
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330 } |