annotate src/core/ngx_buf.c @ 34:aab2ea7c0458 NGINX_0_1_17

nginx 0.1.17 *) Change: the ngx_http_rewrite_module was rewritten from the scratch. Now it is possible to redirect, to return the error codes, to check the variables and referrers. The directives can be used inside locations. The redirect directive was canceled. *) Feature: the ngx_http_geo_module. *) Feature: the proxy_set_x_var and fastcgi_set_var directives. *) Bugfix: the location configuration with "=" modifier may be used in another location. *) Bugfix: the correct content type was set only for requests that use small caps letters in extension. *) Bugfix: if the proxy_pass or fastcgi_pass directives were set in the location, and access was denied, and the error was redirected to a static page, then the segmentation fault occurred. *) Bugfix: if in a proxied "Location" header was a relative URL, then a host name and a slash were added to them; bug appeared in 0.1.14. *) Bugfix: the system error message was not logged on Linux.
author Igor Sysoev <http://sysoev.ru>
date Thu, 03 Feb 2005 00:00:00 +0300
parents 6f8b0dc0f8dd
children 6cfc63e68377
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9
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10
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11 ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size)
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12 {
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13 ngx_buf_t *b;
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14
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15 if (!(b = ngx_calloc_buf(pool))) {
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16 return NULL;
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17 }
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18
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19 if (!(b->start = ngx_palloc(pool, size))) {
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20 return NULL;
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21 }
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22
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23 b->pos = b->start;
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24 b->last = b->start;
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25 b->end = b->last + size;
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26 b->temporary = 1;
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27
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28 /*
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29
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30 b->file_pos = 0;
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31 b->file_last = 0;
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32
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33 b->file = NULL;
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34 b->shadow = NULL;
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35
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36 b->tag = 0;
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37
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38 */
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39
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40 return b;
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41 }
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42
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43
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44 ngx_chain_t *ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs)
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45 {
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46 u_char *p;
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47 ngx_int_t i;
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48 ngx_buf_t *b;
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49 ngx_chain_t *chain, *cl, **ll;
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50
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51 if (!(p = ngx_palloc(pool, bufs->num * bufs->size))) {
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52 return NULL;
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53 }
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54
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55 ll = &chain;
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56
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57 for (i = 0; i < bufs->num; i++) {
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58 if (!(b = ngx_calloc_buf(pool))) {
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59 return NULL;
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60 }
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61
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62 b->pos = p;
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63 b->last = p;
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64 b->temporary = 1;
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65
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66 b->start = p;
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67 p += bufs->size;
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68 b->end = p;
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69
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70 /*
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71 b->file_pos = 0;
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72 b->file_last = 0;
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73
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74 b->file = NULL;
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75 b->shadow = NULL;
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76 b->tag = 0;
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77 */
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78
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79 if (!(cl = ngx_alloc_chain_link(pool))) {
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80 return NULL;
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81 }
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82
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83 cl->buf = b;
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84 *ll = cl;
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85 ll = &cl->next;
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86 }
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87
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88 *ll = NULL;
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89
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90 return chain;
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91 }
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92
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93
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94 ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain,
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95 ngx_chain_t *in)
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96 {
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97 ngx_chain_t *cl, **ll;
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98
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99 ll = chain;
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100
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101 for (cl = *chain; cl; cl = cl->next) {
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102 ll = &cl->next;
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103 }
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104
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105 while (in) {
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106 ngx_test_null(cl, ngx_alloc_chain_link(pool), NGX_ERROR);
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107
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108 cl->buf = in->buf;
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109 *ll = cl;
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110 ll = &cl->next;
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111 in = in->next;
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112 }
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113
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114 *ll = NULL;
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115
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116 return NGX_OK;
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117 }
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118
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119
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120 void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy,
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121 ngx_chain_t **out, ngx_buf_tag_t tag)
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122 {
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123 ngx_chain_t *tl;
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124
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125 if (*busy == NULL) {
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126 *busy = *out;
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127
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128 } else {
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129 for (tl = *busy; tl->next; tl = tl->next) {
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130 /* void */;
0
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131 }
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132
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133 tl->next = *out;
0
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134 }
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135
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136 *out = NULL;
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137
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138 while (*busy) {
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139 if (ngx_buf_size((*busy)->buf) != 0) {
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140 break;
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141 }
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142
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143 #if (NGX_HAVE_WRITE_ZEROCOPY)
0
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144 if ((*busy)->buf->zerocopy_busy) {
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145 break;
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146 }
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147 #endif
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148
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149 if ((*busy)->buf->tag != tag) {
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150 *busy = (*busy)->next;
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151 continue;
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152 }
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153
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154 (*busy)->buf->pos = (*busy)->buf->start;
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155 (*busy)->buf->last = (*busy)->buf->start;
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156
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157 tl = *busy;
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158 *busy = (*busy)->next;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
159 tl->next = *free;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
160 *free = tl;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
161 }
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
162 }