annotate src/http/ngx_http_copy_filter_module.c @ 4487:a786c85e8268

Disable symlinks: don't allow creating or truncating a file via a symlink in the last path component if "if_not_owner" parameter is used. To prevent race condition we have to open a file before checking its owner and there's no way to change access flags for already opened file descriptor, so we disable symlinks for the last path component at all if flags allow creating or truncating the file.
author Valentin Bartenev <vbart@nginx.com>
date Tue, 21 Feb 2012 15:04:41 +0000
parents 30eff7580d0c
children 586969d972b9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
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4 * Copyright (C) Nginx, Inc.
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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6
3
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
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b2e039840718 nginx-0.0.1-2002-12-19-20:49:51 import
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
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10 #include <ngx_http.h>
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53cd05892261 nginx-0.0.1-2002-12-27-19:22:50 import
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11
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12
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
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13 typedef struct {
141
656d468f4ead nginx-0.0.1-2003-10-08-19:32:54 import
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14 ngx_bufs_t bufs;
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af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
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15 } ngx_http_copy_filter_conf_t;
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16
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53cd05892261 nginx-0.0.1-2002-12-27-19:22:50 import
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17
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18 #if (NGX_HAVE_FILE_AIO)
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19 static void ngx_http_copy_aio_handler(ngx_output_chain_ctx_t *ctx,
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20 ngx_file_t *file);
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21 static void ngx_http_copy_aio_event_handler(ngx_event_t *ev);
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22 #if (NGX_HAVE_AIO_SENDFILE)
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23 static void ngx_http_copy_aio_sendfile_event_handler(ngx_event_t *ev);
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24 #endif
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25 #endif
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26
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27 static void *ngx_http_copy_filter_create_conf(ngx_conf_t *cf);
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
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28 static char *ngx_http_copy_filter_merge_conf(ngx_conf_t *cf,
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29 void *parent, void *child);
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30 static ngx_int_t ngx_http_copy_filter_init(ngx_conf_t *cf);
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4f3879d9b6f6 nginx-0.0.1-2002-09-11-19:18:33 import
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32
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33 static ngx_command_t ngx_http_copy_filter_commands[] = {
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34
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35 { ngx_string("output_buffers"),
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36 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
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37 ngx_conf_set_bufs_slot,
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38 NGX_HTTP_LOC_CONF_OFFSET,
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39 offsetof(ngx_http_copy_filter_conf_t, bufs),
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40 NULL },
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41
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42 ngx_null_command
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6f58641241bb nginx-0.0.1-2002-09-07-14:14:25 import
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43 };
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34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
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44
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708f8bb772ec nginx-0.0.1-2002-09-02-18:48:24 import
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45
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46 static ngx_http_module_t ngx_http_copy_filter_module_ctx = {
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47 NULL, /* preconfiguration */
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48 ngx_http_copy_filter_init, /* postconfiguration */
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49
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50 NULL, /* create main configuration */
637625a2acdb nginx-0.0.1-2003-05-19-20:39:14 import
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51 NULL, /* init main configuration */
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e43f406e4525 nginx-0.0.1-2003-03-20-19:09:44 import
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52
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637625a2acdb nginx-0.0.1-2003-05-19-20:39:14 import
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53 NULL, /* create server configuration */
637625a2acdb nginx-0.0.1-2003-05-19-20:39:14 import
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54 NULL, /* merge server configuration */
637625a2acdb nginx-0.0.1-2003-05-19-20:39:14 import
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55
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56 ngx_http_copy_filter_create_conf, /* create location configuration */
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57 ngx_http_copy_filter_merge_conf /* merge location configuration */
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53cb81681040 nginx-0.0.1-2002-12-15-09:25:09 import
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58 };
53cb81681040 nginx-0.0.1-2002-12-15-09:25:09 import
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59
53cb81681040 nginx-0.0.1-2002-12-15-09:25:09 import
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60
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61 ngx_module_t ngx_http_copy_filter_module = {
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62 NGX_MODULE_V1,
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63 &ngx_http_copy_filter_module_ctx, /* module context */
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64 ngx_http_copy_filter_commands, /* module directives */
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a23d010f356d nginx-0.0.1-2003-05-27-16:18:54 import
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65 NGX_HTTP_MODULE, /* module type */
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66 NULL, /* init master */
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67 NULL, /* init module */
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68 NULL, /* init process */
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69 NULL, /* init thread */
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70 NULL, /* exit thread */
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71 NULL, /* exit process */
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72 NULL, /* exit master */
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73 NGX_MODULE_V1_PADDING
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74 };
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75
3
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76
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77 static ngx_http_output_body_filter_pt ngx_http_next_filter;
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78
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80 static ngx_int_t
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81 ngx_http_copy_filter(ngx_http_request_t *r, ngx_chain_t *in)
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82 {
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83 ngx_int_t rc;
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84 ngx_connection_t *c;
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85 ngx_output_chain_ctx_t *ctx;
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86 ngx_http_core_loc_conf_t *clcf;
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87 ngx_http_copy_filter_conf_t *conf;
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88
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89 c = r->connection;
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90
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91 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
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92 "http copy filter: \"%V?%V\"", &r->uri, &r->args);
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93
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94 ctx = ngx_http_get_module_ctx(r, ngx_http_copy_filter_module);
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95
50186b49f2ad nginx-0.0.1-2003-02-11-10:14:40 import
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96 if (ctx == NULL) {
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97 ctx = ngx_pcalloc(r->pool, sizeof(ngx_output_chain_ctx_t));
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98 if (ctx == NULL) {
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99 return NGX_ERROR;
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100 }
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101
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102 ngx_http_set_ctx(r, ctx, ngx_http_copy_filter_module);
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103
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104 conf = ngx_http_get_module_loc_conf(r, ngx_http_copy_filter_module);
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105 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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106
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107 ctx->sendfile = c->sendfile;
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108 ctx->need_in_memory = r->main_filter_need_in_memory
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109 || r->filter_need_in_memory;
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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110 ctx->need_in_temp = r->filter_need_temporary;
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111
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112 ctx->alignment = clcf->directio_alignment;
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113
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114 ctx->pool = r->pool;
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
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115 ctx->bufs = conf->bufs;
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6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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116 ctx->tag = (ngx_buf_tag_t) &ngx_http_copy_filter_module;
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50186b49f2ad nginx-0.0.1-2003-02-11-10:14:40 import
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117
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118 ctx->output_filter = (ngx_output_chain_filter_pt) ngx_http_next_filter;
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119 ctx->filter_ctx = r;
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120
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121 #if (NGX_HAVE_FILE_AIO)
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122 if (ngx_file_aio) {
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123 if (clcf->aio) {
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124 ctx->aio_handler = ngx_http_copy_aio_handler;
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125 }
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126 #if (NGX_HAVE_AIO_SENDFILE)
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127 c->aio_sendfile = (clcf->aio == NGX_HTTP_AIO_SENDFILE);
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128 #endif
3052
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129 }
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130 #endif
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diff changeset
131
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diff changeset
132 if (in && in->buf && ngx_buf_size(in->buf)) {
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diff changeset
133 r->request_output = 1;
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diff changeset
134 }
60
50186b49f2ad nginx-0.0.1-2003-02-11-10:14:40 import
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parents: 59
diff changeset
135 }
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136
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diff changeset
137 #if (NGX_HAVE_FILE_AIO)
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diff changeset
138 ctx->aio = r->aio;
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diff changeset
139 #endif
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140
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141 for ( ;; ) {
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142 rc = ngx_output_chain(ctx, in);
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9b8c906f6e63 nginx-0.1.29-RELEASE import
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143
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144 if (ctx->in == NULL) {
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145 r->buffered &= ~NGX_HTTP_COPY_BUFFERED;
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146
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147 } else {
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148 r->buffered |= NGX_HTTP_COPY_BUFFERED;
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149 }
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150
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151 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0,
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152 "http copy filter: %i \"%V?%V\"", rc, &r->uri, &r->args);
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153
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6fb94acd3a09 fix building on FreeBSD without --with-file-aio
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154 #if (NGX_HAVE_FILE_AIO && NGX_HAVE_AIO_SENDFILE)
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155
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diff changeset
156 if (c->busy_sendfile) {
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diff changeset
157 ssize_t n;
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158 off_t offset;
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159 ngx_file_t *file;
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diff changeset
160 ngx_http_ephemeral_t *e;
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diff changeset
161
4195
35f4997c08ce Fix for socket leak with "aio sendfile" and "limit_rate".
Maxim Dounin <mdounin@mdounin.ru>
parents: 3778
diff changeset
162 if (r->aio) {
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163 c->busy_sendfile = NULL;
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diff changeset
164 return rc;
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parents: 3778
diff changeset
165 }
35f4997c08ce Fix for socket leak with "aio sendfile" and "limit_rate".
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166
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167 file = c->busy_sendfile->file;
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diff changeset
168 offset = c->busy_sendfile->file_pos;
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169
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diff changeset
170 if (file->aio) {
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diff changeset
171 c->aio_sendfile = (offset != file->aio->last_offset);
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172 file->aio->last_offset = offset;
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173
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diff changeset
174 if (c->aio_sendfile == 0) {
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diff changeset
175 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
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diff changeset
176 "sendfile(%V) returned busy again",
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diff changeset
177 &file->name);
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178 }
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179 }
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diff changeset
180
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181 c->busy_sendfile = NULL;
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diff changeset
182 e = (ngx_http_ephemeral_t *) &r->uri_start;
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diff changeset
183
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diff changeset
184 n = ngx_file_aio_read(file, &e->aio_preload, 1, offset, r->pool);
3065
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185
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diff changeset
186 if (n > 0) {
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diff changeset
187 in = NULL;
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188 continue;
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189 }
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190
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191 rc = n;
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diff changeset
192
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diff changeset
193 if (rc == NGX_AGAIN) {
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194 file->aio->data = r;
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195 file->aio->handler = ngx_http_copy_aio_sendfile_event_handler;
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196
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197 r->main->blocked++;
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198 r->aio = 1;
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199 }
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200 }
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diff changeset
201 #endif
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diff changeset
202
3071
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203 return rc;
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diff changeset
204 }
4
c5f071d376e5 nginx-0.0.1-2002-08-22-19:24:03 import
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diff changeset
205 }
9
6f58641241bb nginx-0.0.1-2002-09-07-14:14:25 import
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parents: 8
diff changeset
206
6f58641241bb nginx-0.0.1-2002-09-07-14:14:25 import
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diff changeset
207
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diff changeset
208 #if (NGX_HAVE_FILE_AIO)
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209
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diff changeset
210 static void
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diff changeset
211 ngx_http_copy_aio_handler(ngx_output_chain_ctx_t *ctx, ngx_file_t *file)
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diff changeset
212 {
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diff changeset
213 ngx_http_request_t *r;
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diff changeset
214
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diff changeset
215 r = ctx->filter_ctx;
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diff changeset
216
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diff changeset
217 file->aio->data = r;
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diff changeset
218 file->aio->handler = ngx_http_copy_aio_event_handler;
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diff changeset
219
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diff changeset
220 r->main->blocked++;
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diff changeset
221 r->aio = 1;
3776
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diff changeset
222 ctx->aio = 1;
3052
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diff changeset
223 }
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diff changeset
224
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diff changeset
225
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diff changeset
226 static void
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diff changeset
227 ngx_http_copy_aio_event_handler(ngx_event_t *ev)
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diff changeset
228 {
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diff changeset
229 ngx_event_aio_t *aio;
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diff changeset
230 ngx_http_request_t *r;
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diff changeset
231
6060225e9261 FreeBSD and Linux AIO support
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diff changeset
232 aio = ev->data;
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diff changeset
233 r = aio->data;
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diff changeset
234
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diff changeset
235 r->main->blocked--;
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diff changeset
236 r->aio = 0;
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diff changeset
237
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diff changeset
238 r->connection->write->handler(r->connection->write);
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diff changeset
239 }
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diff changeset
240
3065
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diff changeset
241
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diff changeset
242 #if (NGX_HAVE_AIO_SENDFILE)
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diff changeset
243
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diff changeset
244 static void
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diff changeset
245 ngx_http_copy_aio_sendfile_event_handler(ngx_event_t *ev)
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diff changeset
246 {
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diff changeset
247 ngx_event_aio_t *aio;
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diff changeset
248 ngx_http_request_t *r;
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diff changeset
249
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diff changeset
250 aio = ev->data;
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diff changeset
251 r = aio->data;
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diff changeset
252
113cd532b328 aio sendfile
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diff changeset
253 r->main->blocked--;
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diff changeset
254 r->aio = 0;
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diff changeset
255 ev->complete = 0;
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diff changeset
256
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diff changeset
257 r->connection->write->handler(r->connection->write);
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diff changeset
258 }
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diff changeset
259
113cd532b328 aio sendfile
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diff changeset
260 #endif
3052
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diff changeset
261 #endif
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diff changeset
262
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diff changeset
263
501
d4ea69372b94 nginx-0.1.25-RELEASE import
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parents: 452
diff changeset
264 static void *
d4ea69372b94 nginx-0.1.25-RELEASE import
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parents: 452
diff changeset
265 ngx_http_copy_filter_create_conf(ngx_conf_t *cf)
9
6f58641241bb nginx-0.0.1-2002-09-07-14:14:25 import
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parents: 8
diff changeset
266 {
334
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
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parents: 327
diff changeset
267 ngx_http_copy_filter_conf_t *conf;
9
6f58641241bb nginx-0.0.1-2002-09-07-14:14:25 import
Igor Sysoev <igor@sysoev.ru>
parents: 8
diff changeset
268
501
d4ea69372b94 nginx-0.1.25-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 452
diff changeset
269 conf = ngx_palloc(cf->pool, sizeof(ngx_http_copy_filter_conf_t));
d4ea69372b94 nginx-0.1.25-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 452
diff changeset
270 if (conf == NULL) {
d4ea69372b94 nginx-0.1.25-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 452
diff changeset
271 return NULL;
d4ea69372b94 nginx-0.1.25-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 452
diff changeset
272 }
9
6f58641241bb nginx-0.0.1-2002-09-07-14:14:25 import
Igor Sysoev <igor@sysoev.ru>
parents: 8
diff changeset
273
141
656d468f4ead nginx-0.0.1-2003-10-08-19:32:54 import
Igor Sysoev <igor@sysoev.ru>
parents: 135
diff changeset
274 conf->bufs.num = 0;
10
4f3879d9b6f6 nginx-0.0.1-2002-09-11-19:18:33 import
Igor Sysoev <igor@sysoev.ru>
parents: 9
diff changeset
275
4f3879d9b6f6 nginx-0.0.1-2002-09-11-19:18:33 import
Igor Sysoev <igor@sysoev.ru>
parents: 9
diff changeset
276 return conf;
9
6f58641241bb nginx-0.0.1-2002-09-07-14:14:25 import
Igor Sysoev <igor@sysoev.ru>
parents: 8
diff changeset
277 }
44
0e81ac0bb3e2 nginx-0.0.1-2003-01-09-08:36:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 43
diff changeset
278
0e81ac0bb3e2 nginx-0.0.1-2003-01-09-08:36:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 43
diff changeset
279
501
d4ea69372b94 nginx-0.1.25-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 452
diff changeset
280 static char *
d4ea69372b94 nginx-0.1.25-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 452
diff changeset
281 ngx_http_copy_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child)
44
0e81ac0bb3e2 nginx-0.0.1-2003-01-09-08:36:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 43
diff changeset
282 {
334
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents: 327
diff changeset
283 ngx_http_copy_filter_conf_t *prev = parent;
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents: 327
diff changeset
284 ngx_http_copy_filter_conf_t *conf = child;
44
0e81ac0bb3e2 nginx-0.0.1-2003-01-09-08:36:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 43
diff changeset
285
160
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
286 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, 1, 32768);
44
0e81ac0bb3e2 nginx-0.0.1-2003-01-09-08:36:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 43
diff changeset
287
0e81ac0bb3e2 nginx-0.0.1-2003-01-09-08:36:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 43
diff changeset
288 return NULL;
0e81ac0bb3e2 nginx-0.0.1-2003-01-09-08:36:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 43
diff changeset
289 }
334
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents: 327
diff changeset
290
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents: 327
diff changeset
291
501
d4ea69372b94 nginx-0.1.25-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 452
diff changeset
292 static ngx_int_t
681
7e24168b0853 nginx-0.4.0-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 667
diff changeset
293 ngx_http_copy_filter_init(ngx_conf_t *cf)
334
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents: 327
diff changeset
294 {
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents: 327
diff changeset
295 ngx_http_next_filter = ngx_http_top_body_filter;
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents: 327
diff changeset
296 ngx_http_top_body_filter = ngx_http_copy_filter;
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents: 327
diff changeset
297
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents: 327
diff changeset
298 return NGX_OK;
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents: 327
diff changeset
299 }
af451db3fe99 nginx-0.0.3-2004-05-12-09:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents: 327
diff changeset
300