Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_range_filter_module.c @ 2955:39a7315cd8c2
release-0.8.3 tag
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 19 Jun 2009 10:56:36 +0000 |
parents | 896db5a09bd2 |
children | 616da2ea901f |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
441
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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 #include <ngx_http.h> |
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10 |
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11 |
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12 /* |
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13 * the single part format: |
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14 * |
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15 * "HTTP/1.0 206 Partial Content" CRLF |
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16 * ... header ... |
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17 * "Content-Type: image/jpeg" CRLF |
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18 * "Content-Length: SIZE" CRLF |
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19 * "Content-Range: bytes START-END/SIZE" CRLF |
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20 * CRLF |
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21 * ... data ... |
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22 * |
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23 * |
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24 * the mutlipart format: |
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25 * |
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26 * "HTTP/1.0 206 Partial Content" CRLF |
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27 * ... header ... |
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28 * "Content-Type: multipart/byteranges; boundary=0123456789" CRLF |
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29 * CRLF |
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30 * CRLF |
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31 * "--0123456789" CRLF |
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32 * "Content-Type: image/jpeg" CRLF |
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33 * "Content-Range: bytes START0-END0/SIZE" CRLF |
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34 * CRLF |
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35 * ... data ... |
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36 * CRLF |
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37 * "--0123456789" CRLF |
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38 * "Content-Type: image/jpeg" CRLF |
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39 * "Content-Range: bytes START1-END1/SIZE" CRLF |
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40 * CRLF |
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41 * ... data ... |
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42 * CRLF |
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43 * "--0123456789--" CRLF |
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44 */ |
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45 |
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46 |
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47 typedef struct { |
963
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48 off_t start; |
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49 off_t end; |
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50 ngx_str_t content_range; |
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51 } ngx_http_range_t; |
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52 |
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53 |
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54 typedef struct { |
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55 off_t offset; |
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56 ngx_str_t boundary_header; |
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57 ngx_array_t ranges; |
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58 } ngx_http_range_filter_ctx_t; |
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59 |
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60 |
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61 ngx_int_t ngx_http_range_parse(ngx_http_request_t *r, |
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62 ngx_http_range_filter_ctx_t *ctx); |
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63 static ngx_int_t ngx_http_range_singlepart_header(ngx_http_request_t *r, |
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64 ngx_http_range_filter_ctx_t *ctx); |
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65 static ngx_int_t ngx_http_range_multipart_header(ngx_http_request_t *r, |
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66 ngx_http_range_filter_ctx_t *ctx); |
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67 static ngx_int_t ngx_http_range_not_satisfiable(ngx_http_request_t *r); |
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68 static ngx_int_t ngx_http_range_test_overlapped(ngx_http_request_t *r, |
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69 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in); |
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70 static ngx_int_t ngx_http_range_singlepart_body(ngx_http_request_t *r, |
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71 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in); |
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72 static ngx_int_t ngx_http_range_multipart_body(ngx_http_request_t *r, |
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73 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in); |
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74 |
681 | 75 static ngx_int_t ngx_http_range_header_filter_init(ngx_conf_t *cf); |
76 static ngx_int_t ngx_http_range_body_filter_init(ngx_conf_t *cf); | |
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77 |
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78 |
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79 static ngx_http_module_t ngx_http_range_header_filter_module_ctx = { |
509 | 80 NULL, /* preconfiguration */ |
681 | 81 ngx_http_range_header_filter_init, /* postconfiguration */ |
177
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82 |
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83 NULL, /* create main configuration */ |
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84 NULL, /* init main configuration */ |
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85 |
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86 NULL, /* create server configuration */ |
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87 NULL, /* merge server configuration */ |
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88 |
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89 NULL, /* create location configuration */ |
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90 NULL, /* merge location configuration */ |
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91 }; |
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92 |
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93 |
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94 ngx_module_t ngx_http_range_header_filter_module = { |
509 | 95 NGX_MODULE_V1, |
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96 &ngx_http_range_header_filter_module_ctx, /* module context */ |
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97 NULL, /* module directives */ |
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98 NGX_HTTP_MODULE, /* module type */ |
541 | 99 NULL, /* init master */ |
681 | 100 NULL, /* init module */ |
541 | 101 NULL, /* init process */ |
102 NULL, /* init thread */ | |
103 NULL, /* exit thread */ | |
104 NULL, /* exit process */ | |
105 NULL, /* exit master */ | |
106 NGX_MODULE_V1_PADDING | |
334
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107 }; |
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108 |
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109 |
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110 static ngx_http_module_t ngx_http_range_body_filter_module_ctx = { |
509 | 111 NULL, /* preconfiguration */ |
681 | 112 ngx_http_range_body_filter_init, /* postconfiguration */ |
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113 |
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114 NULL, /* create main configuration */ |
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115 NULL, /* init main configuration */ |
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116 |
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117 NULL, /* create server configuration */ |
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314
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118 NULL, /* merge server configuration */ |
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314
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119 |
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314
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120 NULL, /* create location configuration */ |
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314
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121 NULL, /* merge location configuration */ |
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122 }; |
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123 |
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124 |
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125 ngx_module_t ngx_http_range_body_filter_module = { |
509 | 126 NGX_MODULE_V1, |
334
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127 &ngx_http_range_body_filter_module_ctx, /* module context */ |
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128 NULL, /* module directives */ |
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129 NGX_HTTP_MODULE, /* module type */ |
541 | 130 NULL, /* init master */ |
681 | 131 NULL, /* init module */ |
541 | 132 NULL, /* init process */ |
133 NULL, /* init thread */ | |
134 NULL, /* exit thread */ | |
135 NULL, /* exit process */ | |
136 NULL, /* exit master */ | |
137 NGX_MODULE_V1_PADDING | |
99
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138 }; |
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139 |
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140 |
155
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153
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141 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; |
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153
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142 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; |
99
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143 |
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144 |
493 | 145 static ngx_int_t |
146 ngx_http_range_header_filter(ngx_http_request_t *r) | |
99
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147 { |
1630 | 148 time_t if_range; |
461 | 149 ngx_int_t rc; |
99
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150 ngx_http_range_filter_ctx_t *ctx; |
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151 |
160
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
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155
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152 if (r->http_version < NGX_HTTP_VERSION_10 |
99
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153 || r->headers_out.status != NGX_HTTP_OK |
597 | 154 || r != r->main |
153
c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
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136
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155 || r->headers_out.content_length_n == -1 |
581 | 156 || !r->allow_ranges) |
117
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113
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|
157 { |
155
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158 return ngx_http_next_header_filter(r); |
117
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113
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159 } |
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113
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160 |
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161 if (r->headers_in.range == NULL |
99
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162 || r->headers_in.range->value.len < 7 |
1107
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ngx_strcasecmp()/ngx_strncasecmp()
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163 || ngx_strncasecmp(r->headers_in.range->value.data, |
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|
164 (u_char *) "bytes=", 6) |
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165 != 0) |
99
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|
166 { |
1630 | 167 goto next_filter; |
168 } | |
169 | |
170 if (r->headers_in.if_range && r->headers_out.last_modified_time != -1) { | |
171 | |
172 if_range = ngx_http_parse_time(r->headers_in.if_range->value.data, | |
173 r->headers_in.if_range->value.len); | |
117
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113
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|
174 |
1630 | 175 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
176 "http ir:%d lm:%d", | |
177 if_range, r->headers_out.last_modified_time); | |
117
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178 |
1630 | 179 if (if_range != r->headers_out.last_modified_time) { |
180 goto next_filter; | |
181 } | |
99
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182 } |
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183 |
963
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|
184 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_range_filter_ctx_t)); |
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185 if (ctx == NULL) { |
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186 return NGX_ERROR; |
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187 } |
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188 |
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189 if (ngx_array_init(&ctx->ranges, r->pool, 1, sizeof(ngx_http_range_t)) |
2536
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small optimization: " == NGX_ERROR" > " != NGX_OK"
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2269
diff
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|
190 != NGX_OK) |
461 | 191 { |
192 return NGX_ERROR; | |
193 } | |
99
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194 |
2118
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195 rc = ngx_http_range_parse(r, ctx); |
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196 |
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197 if (rc == NGX_OK) { |
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198 |
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199 ngx_http_set_ctx(r, ctx, ngx_http_range_body_filter_module); |
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200 |
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201 r->headers_out.status = NGX_HTTP_PARTIAL_CONTENT; |
2592
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|
202 r->headers_out.status_line.len = 0; |
2118
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203 |
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|
204 if (ctx->ranges.nelts == 1) { |
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205 return ngx_http_range_singlepart_header(r, ctx); |
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206 } |
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|
207 |
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208 return ngx_http_range_multipart_header(r, ctx); |
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|
209 } |
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|
210 |
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211 if (rc == NGX_HTTP_RANGE_NOT_SATISFIABLE) { |
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212 return ngx_http_range_not_satisfiable(r); |
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|
213 } |
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|
214 |
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215 /* rc == NGX_ERROR */ |
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216 |
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217 return rc; |
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|
218 |
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219 next_filter: |
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220 |
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221 r->headers_out.accept_ranges = ngx_list_push(&r->headers_out.headers); |
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222 if (r->headers_out.accept_ranges == NULL) { |
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223 return NGX_ERROR; |
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224 } |
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|
225 |
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226 r->headers_out.accept_ranges->hash = 1; |
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227 r->headers_out.accept_ranges->key.len = sizeof("Accept-Ranges") - 1; |
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228 r->headers_out.accept_ranges->key.data = (u_char *) "Accept-Ranges"; |
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229 r->headers_out.accept_ranges->value.len = sizeof("bytes") - 1; |
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230 r->headers_out.accept_ranges->value.data = (u_char *) "bytes"; |
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231 |
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232 return ngx_http_next_header_filter(r); |
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233 } |
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|
234 |
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235 |
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236 ngx_int_t |
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237 ngx_http_range_parse(ngx_http_request_t *r, ngx_http_range_filter_ctx_t *ctx) |
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238 { |
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|
239 u_char *p; |
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240 off_t start, end; |
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|
241 ngx_uint_t suffix; |
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242 ngx_http_range_t *range; |
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|
243 |
99
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|
244 p = r->headers_in.range->value.data + 6; |
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|
245 |
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|
246 for ( ;; ) { |
231
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195
diff
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|
247 start = 0; |
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248 end = 0; |
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195
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|
249 suffix = 0; |
99
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|
250 |
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parents:
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251 while (*p == ' ') { p++; } |
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parents:
diff
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|
252 |
231
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parents:
195
diff
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253 if (*p != '-') { |
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parents:
195
diff
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254 if (*p < '0' || *p > '9') { |
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255 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
231
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parents:
195
diff
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|
256 } |
99
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parents:
diff
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|
257 |
231
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195
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258 while (*p >= '0' && *p <= '9') { |
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195
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259 start = start * 10 + *p++ - '0'; |
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parents:
195
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260 } |
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261 |
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parents:
195
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262 while (*p == ' ') { p++; } |
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parents:
195
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263 |
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nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
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264 if (*p++ != '-') { |
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265 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
231
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parents:
195
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266 } |
99
a059e1aa65d4
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Igor Sysoev <igor@sysoev.ru>
parents:
diff
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|
267 |
231
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268 if (start >= r->headers_out.content_length_n) { |
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269 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
231
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parents:
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270 } |
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271 |
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nginx-0.0.1-2004-01-16-21:29:15 import
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272 while (*p == ' ') { p++; } |
99
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parents:
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273 |
231
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274 if (*p == ',' || *p == '\0') { |
963
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275 range = ngx_array_push(&ctx->ranges); |
501 | 276 if (range == NULL) { |
461 | 277 return NGX_ERROR; |
278 } | |
279 | |
231
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280 range->start = start; |
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281 range->end = r->headers_out.content_length_n; |
99
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parents:
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282 |
231
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nginx-0.0.1-2004-01-16-21:29:15 import
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195
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283 if (*p++ != ',') { |
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284 return NGX_OK; |
231
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195
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285 } |
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nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
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286 |
99
a059e1aa65d4
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parents:
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287 continue; |
a059e1aa65d4
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Igor Sysoev <igor@sysoev.ru>
parents:
diff
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|
288 } |
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
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parents:
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|
289 |
231
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nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
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290 } else { |
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nginx-0.0.1-2004-01-16-21:29:15 import
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291 suffix = 1; |
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195
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292 p++; |
99
a059e1aa65d4
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parents:
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|
293 } |
a059e1aa65d4
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parents:
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|
294 |
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295 if (*p < '0' || *p > '9') { |
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296 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
99
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Igor Sysoev <igor@sysoev.ru>
parents:
diff
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|
297 } |
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Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
298 |
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parents:
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|
299 while (*p >= '0' && *p <= '9') { |
a059e1aa65d4
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Igor Sysoev <igor@sysoev.ru>
parents:
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300 end = end * 10 + *p++ - '0'; |
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Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
301 } |
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
302 |
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
303 while (*p == ' ') { p++; } |
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
304 |
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nginx-0.0.1-2003-06-02-19:24:30 import
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parents:
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305 if (*p != ',' && *p != '\0') { |
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306 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
99
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Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
307 } |
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
308 |
231
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
changeset
|
309 if (suffix) { |
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
changeset
|
310 start = r->headers_out.content_length_n - end; |
92db0aa1e83f
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parents:
195
diff
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311 end = r->headers_out.content_length_n - 1; |
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
changeset
|
312 } |
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
changeset
|
313 |
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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195
diff
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|
314 if (start > end) { |
2118
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|
315 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
99
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
316 } |
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
317 |
963
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diff
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|
318 range = ngx_array_push(&ctx->ranges); |
501 | 319 if (range == NULL) { |
461 | 320 return NGX_ERROR; |
321 } | |
322 | |
99
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
323 range->start = start; |
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
324 |
231
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
changeset
|
325 if (end >= r->headers_out.content_length_n) { |
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
changeset
|
326 /* |
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
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|
327 * Download Accelerator sends the last byte position |
92db0aa1e83f
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parents:
195
diff
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|
328 * that equals to the file length |
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
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|
329 */ |
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
changeset
|
330 range->end = r->headers_out.content_length_n; |
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
changeset
|
331 |
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
changeset
|
332 } else { |
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
333 range->end = end + 1; |
99
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
334 } |
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
335 |
231
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
changeset
|
336 if (*p++ != ',') { |
2118
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parents:
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diff
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|
337 return NGX_OK; |
231
92db0aa1e83f
nginx-0.0.1-2004-01-16-21:29:15 import
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parents:
195
diff
changeset
|
338 } |
99
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
339 } |
2118
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parents:
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diff
changeset
|
340 } |
c1f589732d8c
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parents:
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diff
changeset
|
341 |
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parents:
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diff
changeset
|
342 |
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diff
changeset
|
343 static ngx_int_t |
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|
344 ngx_http_range_singlepart_header(ngx_http_request_t *r, |
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diff
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|
345 ngx_http_range_filter_ctx_t *ctx) |
c1f589732d8c
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changeset
|
346 { |
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diff
changeset
|
347 ngx_table_elt_t *content_range; |
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changeset
|
348 ngx_http_range_t *range; |
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changeset
|
349 |
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parents:
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diff
changeset
|
350 content_range = ngx_list_push(&r->headers_out.headers); |
c1f589732d8c
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parents:
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diff
changeset
|
351 if (content_range == NULL) { |
c1f589732d8c
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diff
changeset
|
352 return NGX_ERROR; |
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split ngx_http_range_filter_module
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parents:
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diff
changeset
|
353 } |
99
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
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parents:
diff
changeset
|
354 |
2118
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split ngx_http_range_filter_module
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parents:
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diff
changeset
|
355 r->headers_out.content_range = content_range; |
461 | 356 |
2118
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diff
changeset
|
357 content_range->hash = 1; |
c1f589732d8c
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parents:
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diff
changeset
|
358 content_range->key.len = sizeof("Content-Range") - 1; |
c1f589732d8c
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parents:
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diff
changeset
|
359 content_range->key.data = (u_char *) "Content-Range"; |
99
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
360 |
2118
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parents:
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diff
changeset
|
361 content_range->value.data = ngx_pnalloc(r->pool, |
c1f589732d8c
split ngx_http_range_filter_module
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parents:
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diff
changeset
|
362 sizeof("bytes -/") - 1 + 3 * NGX_OFF_T_LEN); |
c1f589732d8c
split ngx_http_range_filter_module
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parents:
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diff
changeset
|
363 if (content_range->value.data == NULL) { |
c1f589732d8c
split ngx_http_range_filter_module
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parents:
2049
diff
changeset
|
364 return NGX_ERROR; |
461 | 365 } |
366 | |
2118
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diff
changeset
|
367 /* "Content-Range: bytes SSSS-EEEE/TTTT" header */ |
461 | 368 |
2118
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369 range = ctx->ranges.elts; |
461 | 370 |
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371 content_range->value.len = ngx_sprintf(content_range->value.data, |
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372 "bytes %O-%O/%O", |
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373 range->start, range->end - 1, |
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374 r->headers_out.content_length_n) |
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375 - content_range->value.data; |
461 | 376 |
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377 r->headers_out.content_length_n = range->end - range->start; |
461 | 378 |
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379 if (r->headers_out.content_length) { |
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380 r->headers_out.content_length->hash = 0; |
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381 r->headers_out.content_length = NULL; |
461 | 382 } |
383 | |
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384 return ngx_http_next_header_filter(r); |
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385 } |
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386 |
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387 |
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388 static ngx_int_t |
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389 ngx_http_range_multipart_header(ngx_http_request_t *r, |
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390 ngx_http_range_filter_ctx_t *ctx) |
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391 { |
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392 size_t len; |
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393 ngx_uint_t i; |
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394 ngx_http_range_t *range; |
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395 ngx_atomic_uint_t boundary; |
461 | 396 |
493 | 397 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN |
398 + sizeof(CRLF "Content-Type: ") - 1 | |
509 | 399 + r->headers_out.content_type.len |
461 | 400 + sizeof(CRLF "Content-Range: bytes ") - 1; |
401 | |
402 if (r->headers_out.charset.len) { | |
403 len += sizeof("; charset=") - 1 + r->headers_out.charset.len; | |
404 } | |
405 | |
2049 | 406 ctx->boundary_header.data = ngx_pnalloc(r->pool, len); |
501 | 407 if (ctx->boundary_header.data == NULL) { |
461 | 408 return NGX_ERROR; |
409 } | |
410 | |
493 | 411 boundary = ngx_next_temp_number(0); |
461 | 412 |
413 /* | |
414 * The boundary header of the range: | |
415 * CRLF | |
416 * "--0123456789" CRLF | |
417 * "Content-Type: image/jpeg" CRLF | |
418 * "Content-Range: bytes " | |
419 */ | |
420 | |
421 if (r->headers_out.charset.len) { | |
422 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, | |
493 | 423 CRLF "--%0muA" CRLF |
461 | 424 "Content-Type: %V; charset=%V" CRLF |
425 "Content-Range: bytes ", | |
426 boundary, | |
509 | 427 &r->headers_out.content_type, |
461 | 428 &r->headers_out.charset) |
429 - ctx->boundary_header.data; | |
430 | |
431 r->headers_out.charset.len = 0; | |
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432 |
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433 } else if (r->headers_out.content_type.len) { |
461 | 434 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, |
493 | 435 CRLF "--%0muA" CRLF |
461 | 436 "Content-Type: %V" CRLF |
437 "Content-Range: bytes ", | |
438 boundary, | |
509 | 439 &r->headers_out.content_type) |
461 | 440 - ctx->boundary_header.data; |
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441 |
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442 } else { |
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443 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, |
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444 CRLF "--%0muA" CRLF |
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445 "Content-Range: bytes ", |
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446 boundary) |
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447 - ctx->boundary_header.data; |
461 | 448 } |
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449 |
509 | 450 r->headers_out.content_type.data = |
2049 | 451 ngx_pnalloc(r->pool, |
452 sizeof("Content-Type: multipart/byteranges; boundary=") - 1 | |
453 + NGX_ATOMIC_T_LEN); | |
165
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454 |
509 | 455 if (r->headers_out.content_type.data == NULL) { |
461 | 456 return NGX_ERROR; |
457 } | |
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458 |
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459 r->headers_out.content_type_lowcase = NULL; |
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460 |
461 | 461 /* "Content-Type: multipart/byteranges; boundary=0123456789" */ |
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462 |
509 | 463 r->headers_out.content_type.len = |
464 ngx_sprintf(r->headers_out.content_type.data, | |
493 | 465 "multipart/byteranges; boundary=%0muA", |
461 | 466 boundary) |
509 | 467 - r->headers_out.content_type.data; |
160
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468 |
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469 r->headers_out.content_type_len = r->headers_out.content_type.len; |
493 | 470 |
461 | 471 /* the size of the last boundary CRLF "--0123456789--" CRLF */ |
493 | 472 |
473 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN + sizeof("--" CRLF) - 1; | |
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474 |
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475 range = ctx->ranges.elts; |
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476 for (i = 0; i < ctx->ranges.nelts; i++) { |
455 | 477 |
461 | 478 /* the size of the range: "SSSS-EEEE/TTTT" CRLF CRLF */ |
455 | 479 |
461 | 480 range[i].content_range.data = |
2049 | 481 ngx_pnalloc(r->pool, 3 * NGX_OFF_T_LEN + 2 + 4); |
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482 |
461 | 483 if (range[i].content_range.data == NULL) { |
484 return NGX_ERROR; | |
485 } | |
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486 |
461 | 487 range[i].content_range.len = ngx_sprintf(range[i].content_range.data, |
488 "%O-%O/%O" CRLF CRLF, | |
489 range[i].start, range[i].end - 1, | |
490 r->headers_out.content_length_n) | |
491 - range[i].content_range.data; | |
160
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492 |
461 | 493 len += ctx->boundary_header.len + range[i].content_range.len |
494 + (size_t) (range[i].end - range[i].start); | |
495 } | |
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496 |
461 | 497 r->headers_out.content_length_n = len; |
960 | 498 |
499 if (r->headers_out.content_length) { | |
500 r->headers_out.content_length->hash = 0; | |
501 r->headers_out.content_length = NULL; | |
502 } | |
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503 |
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504 return ngx_http_next_header_filter(r); |
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505 } |
1630 | 506 |
507 | |
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508 static ngx_int_t |
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509 ngx_http_range_not_satisfiable(ngx_http_request_t *r) |
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510 { |
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511 ngx_table_elt_t *content_range; |
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512 |
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513 r->headers_out.status = NGX_HTTP_RANGE_NOT_SATISFIABLE; |
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514 |
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515 content_range = ngx_list_push(&r->headers_out.headers); |
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516 if (content_range == NULL) { |
1630 | 517 return NGX_ERROR; |
518 } | |
519 | |
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520 r->headers_out.content_range = content_range; |
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521 |
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522 content_range->hash = 1; |
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523 content_range->key.len = sizeof("Content-Range") - 1; |
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524 content_range->key.data = (u_char *) "Content-Range"; |
1630 | 525 |
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526 content_range->value.data = ngx_pnalloc(r->pool, |
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527 sizeof("bytes */") - 1 + NGX_OFF_T_LEN); |
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528 if (content_range->value.data == NULL) { |
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529 return NGX_ERROR; |
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530 } |
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531 |
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532 content_range->value.len = ngx_sprintf(content_range->value.data, |
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533 "bytes */%O", |
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534 r->headers_out.content_length_n) |
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535 - content_range->value.data; |
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536 |
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537 ngx_http_clear_content_length(r); |
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538 |
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539 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
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540 } |
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541 |
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542 |
493 | 543 static ngx_int_t |
544 ngx_http_range_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
99
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545 { |
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546 ngx_http_range_filter_ctx_t *ctx; |
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547 |
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548 if (in == NULL) { |
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549 return ngx_http_next_body_filter(r, in); |
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550 } |
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551 |
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552 ctx = ngx_http_get_module_ctx(r, ngx_http_range_body_filter_module); |
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553 |
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554 if (ctx == NULL) { |
155
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555 return ngx_http_next_body_filter(r, in); |
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556 } |
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557 |
2121
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558 if (ctx->ranges.nelts == 1) { |
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559 return ngx_http_range_singlepart_body(r, ctx, in); |
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560 } |
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561 |
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562 /* |
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563 * multipart ranges are supported only if whole body is in a single buffer |
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564 */ |
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565 |
962
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566 if (ngx_buf_special(in->buf)) { |
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567 return ngx_http_next_body_filter(r, in); |
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568 } |
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569 |
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570 if (ngx_http_range_test_overlapped(r, ctx, in) != NGX_OK) { |
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571 return NGX_ERROR; |
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572 } |
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573 |
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574 return ngx_http_range_multipart_body(r, ctx, in); |
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575 } |
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576 |
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577 |
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578 static ngx_int_t |
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579 ngx_http_range_test_overlapped(ngx_http_request_t *r, |
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580 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in) |
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581 { |
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582 off_t start, last; |
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583 ngx_buf_t *buf; |
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584 ngx_uint_t i; |
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585 ngx_http_range_t *range; |
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586 |
962
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587 if (ctx->offset) { |
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588 goto overlapped; |
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589 } |
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590 |
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591 buf = in->buf; |
960 | 592 |
593 if (!buf->last_buf) { | |
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594 |
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595 if (buf->in_file) { |
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596 start = buf->file_pos + ctx->offset; |
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597 last = buf->file_last + ctx->offset; |
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598 |
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599 } else { |
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600 start = buf->pos - buf->start + ctx->offset; |
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601 last = buf->last - buf->start + ctx->offset; |
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602 } |
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603 |
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604 range = ctx->ranges.elts; |
963
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605 for (i = 0; i < ctx->ranges.nelts; i++) { |
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606 if (start > range[i].start || last < range[i].end) { |
960 | 607 goto overlapped; |
608 } | |
609 } | |
610 } | |
611 | |
962
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612 ctx->offset = ngx_buf_size(buf); |
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613 |
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614 return NGX_OK; |
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615 |
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616 overlapped: |
960 | 617 |
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618 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
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619 "range in overlapped buffers"); |
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620 |
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621 return NGX_ERROR; |
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622 } |
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623 |
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624 |
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625 static ngx_int_t |
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626 ngx_http_range_singlepart_body(ngx_http_request_t *r, |
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627 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in) |
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628 { |
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629 off_t start, last; |
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630 ngx_buf_t *buf; |
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631 ngx_chain_t *out, *cl, **ll; |
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632 ngx_http_range_t *range; |
960 | 633 |
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634 out = NULL; |
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635 ll = &out; |
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636 range = ctx->ranges.elts; |
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637 |
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638 for (cl = in; cl; cl = cl->next) { |
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639 |
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640 buf = cl->buf; |
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641 |
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642 start = ctx->offset; |
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643 last = ctx->offset + ngx_buf_size(buf); |
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644 |
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645 ctx->offset = last; |
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646 |
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647 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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648 "http range body buf: %O-%O", start, last); |
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649 |
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650 if (ngx_buf_special(buf)) { |
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651 *ll = cl; |
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652 ll = &cl->next; |
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653 continue; |
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654 } |
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655 |
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656 if (range->end <= start || range->start >= last) { |
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657 |
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658 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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659 "http range body skip"); |
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660 |
2269 | 661 if (buf->in_file) { |
662 buf->file_pos = buf->file_last; | |
663 } | |
664 | |
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665 buf->pos = buf->last; |
2269 | 666 buf->sync = 1; |
667 | |
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668 continue; |
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669 } |
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670 |
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671 if (range->start > start) { |
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672 |
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673 if (buf->in_file) { |
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674 buf->file_pos += range->start - start; |
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675 } |
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676 |
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677 if (ngx_buf_in_memory(buf)) { |
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678 buf->pos += (size_t) (range->start - start); |
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679 } |
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680 } |
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681 |
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682 if (range->end <= last) { |
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683 |
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684 if (buf->in_file) { |
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685 buf->file_last -= last - range->end; |
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686 } |
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687 |
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688 if (ngx_buf_in_memory(buf)) { |
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689 buf->last -= (size_t) (last - range->end); |
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690 } |
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691 |
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692 buf->last_buf = 1; |
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693 *ll = cl; |
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694 cl->next = NULL; |
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695 |
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696 break; |
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697 } |
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698 |
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699 *ll = cl; |
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700 ll = &cl->next; |
960 | 701 } |
702 | |
2121
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703 if (out == NULL) { |
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704 return NGX_OK; |
2118
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705 } |
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706 |
2121
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707 return ngx_http_next_body_filter(r, out); |
2118
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708 } |
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|
709 |
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|
710 |
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|
711 static ngx_int_t |
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712 ngx_http_range_multipart_body(ngx_http_request_t *r, |
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713 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in) |
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714 { |
2592
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715 off_t body_start; |
2118
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716 ngx_buf_t *b, *buf; |
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717 ngx_uint_t i; |
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718 ngx_chain_t *out, *hcl, *rcl, *dcl, **ll; |
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719 ngx_http_range_t *range; |
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720 |
960 | 721 ll = &out; |
2118
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|
722 buf = in->buf; |
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723 range = ctx->ranges.elts; |
160
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724 |
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725 #if (NGX_HTTP_CACHE) |
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726 body_start = r->cached ? r->cache->body_start : 0; |
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727 #else |
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728 body_start = 0; |
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729 #endif |
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|
730 |
963
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962
diff
changeset
|
731 for (i = 0; i < ctx->ranges.nelts; i++) { |
99
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|
732 |
960 | 733 /* |
734 * The boundary header of the range: | |
735 * CRLF | |
736 * "--0123456789" CRLF | |
737 * "Content-Type: image/jpeg" CRLF | |
738 * "Content-Range: bytes " | |
739 */ | |
740 | |
741 b = ngx_calloc_buf(r->pool); | |
742 if (b == NULL) { | |
743 return NGX_ERROR; | |
99
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|
744 } |
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parents:
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|
745 |
960 | 746 b->memory = 1; |
747 b->pos = ctx->boundary_header.data; | |
748 b->last = ctx->boundary_header.data + ctx->boundary_header.len; | |
160
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|
749 |
960 | 750 hcl = ngx_alloc_chain_link(r->pool); |
751 if (hcl == NULL) { | |
752 return NGX_ERROR; | |
753 } | |
461 | 754 |
960 | 755 hcl->buf = b; |
99
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756 |
461 | 757 |
960 | 758 /* "SSSS-EEEE/TTTT" CRLF CRLF */ |
160
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759 |
501 | 760 b = ngx_calloc_buf(r->pool); |
761 if (b == NULL) { | |
461 | 762 return NGX_ERROR; |
763 } | |
764 | |
343
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335
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|
765 b->temporary = 1; |
960 | 766 b->pos = range[i].content_range.data; |
767 b->last = range[i].content_range.data + range[i].content_range.len; | |
768 | |
769 rcl = ngx_alloc_chain_link(r->pool); | |
770 if (rcl == NULL) { | |
771 return NGX_ERROR; | |
772 } | |
773 | |
774 rcl->buf = b; | |
775 | |
776 | |
777 /* the range data */ | |
461 | 778 |
960 | 779 b = ngx_calloc_buf(r->pool); |
780 if (b == NULL) { | |
781 return NGX_ERROR; | |
782 } | |
783 | |
962
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|
784 b->in_file = buf->in_file; |
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|
785 b->temporary = buf->temporary; |
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|
786 b->memory = buf->memory; |
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|
787 b->mmap = buf->mmap; |
960 | 788 b->file = buf->file; |
789 | |
962
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diff
changeset
|
790 if (buf->in_file) { |
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|
791 b->file_pos = body_start + range[i].start; |
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|
792 b->file_last = body_start + range[i].end; |
962
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|
793 } |
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|
794 |
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|
795 if (ngx_buf_in_memory(buf)) { |
1093 | 796 b->pos = buf->start + (size_t) range[i].start; |
797 b->last = buf->start + (size_t) range[i].end; | |
962
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diff
changeset
|
798 } |
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|
799 |
960 | 800 dcl = ngx_alloc_chain_link(r->pool); |
801 if (dcl == NULL) { | |
461 | 802 return NGX_ERROR; |
803 } | |
804 | |
960 | 805 dcl->buf = b; |
461 | 806 |
155
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|
807 *ll = hcl; |
960 | 808 hcl->next = rcl; |
809 rcl->next = dcl; | |
810 ll = &dcl->next; | |
811 } | |
99
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|
812 |
960 | 813 /* the last boundary CRLF "--0123456789--" CRLF */ |
814 | |
815 b = ngx_calloc_buf(r->pool); | |
816 if (b == NULL) { | |
817 return NGX_ERROR; | |
818 } | |
819 | |
820 b->temporary = 1; | |
821 b->last_buf = 1; | |
822 | |
2049 | 823 b->pos = ngx_pnalloc(r->pool, sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN |
824 + sizeof("--" CRLF) - 1); | |
960 | 825 if (b->pos == NULL) { |
826 return NGX_ERROR; | |
99
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|
827 } |
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diff
changeset
|
828 |
1195
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1107
diff
changeset
|
829 b->last = ngx_cpymem(b->pos, ctx->boundary_header.data, |
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parents:
1107
diff
changeset
|
830 sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN); |
960 | 831 *b->last++ = '-'; *b->last++ = '-'; |
832 *b->last++ = CR; *b->last++ = LF; | |
833 | |
834 hcl = ngx_alloc_chain_link(r->pool); | |
835 if (hcl == NULL) { | |
836 return NGX_ERROR; | |
837 } | |
838 | |
839 hcl->buf = b; | |
840 hcl->next = NULL; | |
99
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|
841 |
960 | 842 *ll = hcl; |
843 | |
844 return ngx_http_next_body_filter(r, out); | |
99
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|
845 } |
a059e1aa65d4
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diff
changeset
|
846 |
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|
847 |
493 | 848 static ngx_int_t |
681 | 849 ngx_http_range_header_filter_init(ngx_conf_t *cf) |
99
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|
850 { |
155
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153
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|
851 ngx_http_next_header_filter = ngx_http_top_header_filter; |
99
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parents:
diff
changeset
|
852 ngx_http_top_header_filter = ngx_http_range_header_filter; |
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changeset
|
853 |
334
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314
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|
854 return NGX_OK; |
af451db3fe99
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314
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|
855 } |
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|
856 |
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|
857 |
493 | 858 static ngx_int_t |
681 | 859 ngx_http_range_body_filter_init(ngx_conf_t *cf) |
334
af451db3fe99
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314
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|
860 { |
155
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|
861 ngx_http_next_body_filter = ngx_http_top_body_filter; |
99
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diff
changeset
|
862 ngx_http_top_body_filter = ngx_http_range_body_filter; |
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
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parents:
diff
changeset
|
863 |
a059e1aa65d4
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diff
changeset
|
864 return NGX_OK; |
a059e1aa65d4
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parents:
diff
changeset
|
865 } |