50
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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50
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_http.h>
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11
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12
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13 /*
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14 * the single part format:
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15 *
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16 * "HTTP/1.0 206 Partial Content" CRLF
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17 * ... header ...
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18 * "Content-Type: image/jpeg" CRLF
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19 * "Content-Length: SIZE" CRLF
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20 * "Content-Range: bytes START-END/SIZE" CRLF
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21 * CRLF
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22 * ... data ...
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23 *
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24 *
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25 * the mutlipart format:
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26 *
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27 * "HTTP/1.0 206 Partial Content" CRLF
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28 * ... header ...
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29 * "Content-Type: multipart/byteranges; boundary=0123456789" CRLF
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30 * CRLF
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31 * CRLF
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32 * "--0123456789" CRLF
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33 * "Content-Type: image/jpeg" CRLF
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34 * "Content-Range: bytes START0-END0/SIZE" CRLF
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35 * CRLF
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36 * ... data ...
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37 * CRLF
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38 * "--0123456789" CRLF
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39 * "Content-Type: image/jpeg" CRLF
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40 * "Content-Range: bytes START1-END1/SIZE" CRLF
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41 * CRLF
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42 * ... data ...
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43 * CRLF
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44 * "--0123456789--" CRLF
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45 */
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46
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47
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48 typedef struct {
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272
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49 off_t start;
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50 off_t end;
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51 ngx_str_t content_range;
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52 } ngx_http_range_t;
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53
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54
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55 typedef struct {
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56 off_t offset;
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57 ngx_str_t boundary_header;
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58 ngx_array_t ranges;
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50
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59 } ngx_http_range_filter_ctx_t;
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60
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61
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636
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62 static ngx_int_t ngx_http_range_parse(ngx_http_request_t *r,
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63 ngx_http_range_filter_ctx_t *ctx, ngx_uint_t ranges);
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390
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64 static ngx_int_t ngx_http_range_singlepart_header(ngx_http_request_t *r,
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65 ngx_http_range_filter_ctx_t *ctx);
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66 static ngx_int_t ngx_http_range_multipart_header(ngx_http_request_t *r,
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67 ngx_http_range_filter_ctx_t *ctx);
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68 static ngx_int_t ngx_http_range_not_satisfiable(ngx_http_request_t *r);
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69 static ngx_int_t ngx_http_range_test_overlapped(ngx_http_request_t *r,
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70 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in);
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71 static ngx_int_t ngx_http_range_singlepart_body(ngx_http_request_t *r,
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72 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in);
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73 static ngx_int_t ngx_http_range_multipart_body(ngx_http_request_t *r,
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74 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in);
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75
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230
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76 static ngx_int_t ngx_http_range_header_filter_init(ngx_conf_t *cf);
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77 static ngx_int_t ngx_http_range_body_filter_init(ngx_conf_t *cf);
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50
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78
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79
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80 static ngx_http_module_t ngx_http_range_header_filter_module_ctx = {
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58
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81 NULL, /* preconfiguration */
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230
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82 ngx_http_range_header_filter_init, /* postconfiguration */
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50
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83
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84 NULL, /* create main configuration */
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85 NULL, /* init main configuration */
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86
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87 NULL, /* create server configuration */
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88 NULL, /* merge server configuration */
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89
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90 NULL, /* create location configuration */
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91 NULL, /* merge location configuration */
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92 };
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93
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94
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95 ngx_module_t ngx_http_range_header_filter_module = {
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58
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96 NGX_MODULE_V1,
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50
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97 &ngx_http_range_header_filter_module_ctx, /* module context */
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98 NULL, /* module directives */
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99 NGX_HTTP_MODULE, /* module type */
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90
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100 NULL, /* init master */
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230
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101 NULL, /* init module */
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90
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102 NULL, /* init process */
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103 NULL, /* init thread */
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104 NULL, /* exit thread */
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105 NULL, /* exit process */
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106 NULL, /* exit master */
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107 NGX_MODULE_V1_PADDING
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50
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108 };
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109
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110
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111 static ngx_http_module_t ngx_http_range_body_filter_module_ctx = {
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58
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112 NULL, /* preconfiguration */
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230
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113 ngx_http_range_body_filter_init, /* postconfiguration */
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50
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114
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115 NULL, /* create main configuration */
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116 NULL, /* init main configuration */
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117
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118 NULL, /* create server configuration */
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119 NULL, /* merge server configuration */
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120
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121 NULL, /* create location configuration */
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122 NULL, /* merge location configuration */
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123 };
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124
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125
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126 ngx_module_t ngx_http_range_body_filter_module = {
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58
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127 NGX_MODULE_V1,
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50
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128 &ngx_http_range_body_filter_module_ctx, /* module context */
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129 NULL, /* module directives */
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130 NGX_HTTP_MODULE, /* module type */
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90
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131 NULL, /* init master */
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230
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132 NULL, /* init module */
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90
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133 NULL, /* init process */
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134 NULL, /* init thread */
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135 NULL, /* exit thread */
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136 NULL, /* exit process */
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137 NULL, /* exit master */
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138 NGX_MODULE_V1_PADDING
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50
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139 };
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140
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141
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142 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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143 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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144
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145
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146 static ngx_int_t
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147 ngx_http_range_header_filter(ngx_http_request_t *r)
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148 {
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680
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149 time_t if_range_time;
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150 ngx_str_t *if_range, *etag;
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636
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151 ngx_http_core_loc_conf_t *clcf;
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50
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152 ngx_http_range_filter_ctx_t *ctx;
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153
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154 if (r->http_version < NGX_HTTP_VERSION_10
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155 || r->headers_out.status != NGX_HTTP_OK
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146
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156 || r != r->main
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50
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157 || r->headers_out.content_length_n == -1
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130
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158 || !r->allow_ranges)
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50
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159 {
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160 return ngx_http_next_header_filter(r);
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161 }
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162
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636
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163 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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164
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165 if (clcf->max_ranges == 0) {
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166 return ngx_http_next_header_filter(r);
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167 }
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168
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50
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169 if (r->headers_in.range == NULL
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170 || r->headers_in.range->value.len < 7
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286
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171 || ngx_strncasecmp(r->headers_in.range->value.data,
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172 (u_char *) "bytes=", 6)
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173 != 0)
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50
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174 {
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346
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175 goto next_filter;
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176 }
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177
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680
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178 if (r->headers_in.if_range) {
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179
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180 if_range = &r->headers_in.if_range->value;
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181
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182 if (if_range->len >= 2 && if_range->data[if_range->len - 1] == '"') {
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183
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184 if (r->headers_out.etag == NULL) {
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185 goto next_filter;
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186 }
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187
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188 etag = &r->headers_out.etag->value;
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189
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190 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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191 "http ir:%V etag:%V", if_range, etag);
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346
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192
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680
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193 if (if_range->len != etag->len
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194 || ngx_strncmp(if_range->data, etag->data, etag->len) != 0)
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195 {
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196 goto next_filter;
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197 }
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198
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199 goto parse;
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200 }
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201
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202 if (r->headers_out.last_modified_time == (time_t) -1) {
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203 goto next_filter;
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204 }
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205
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206 if_range_time = ngx_http_parse_time(if_range->data, if_range->len);
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50
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207
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346
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208 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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209 "http ir:%d lm:%d",
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680
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210 if_range_time, r->headers_out.last_modified_time);
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50
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211
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680
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212 if (if_range_time != r->headers_out.last_modified_time) {
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346
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213 goto next_filter;
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214 }
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50
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215 }
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216
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680
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217 parse:
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218
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272
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219 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_range_filter_ctx_t));
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220 if (ctx == NULL) {
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221 return NGX_ERROR;
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222 }
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223
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224 if (ngx_array_init(&ctx->ranges, r->pool, 1, sizeof(ngx_http_range_t))
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454
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225 != NGX_OK)
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50
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226 {
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227 return NGX_ERROR;
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228 }
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229
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636
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230 switch (ngx_http_range_parse(r, ctx, clcf->max_ranges)) {
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390
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231
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636
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232 case NGX_OK:
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390
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233 ngx_http_set_ctx(r, ctx, ngx_http_range_body_filter_module);
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234
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235 r->headers_out.status = NGX_HTTP_PARTIAL_CONTENT;
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464
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236 r->headers_out.status_line.len = 0;
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390
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237
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238 if (ctx->ranges.nelts == 1) {
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239 return ngx_http_range_singlepart_header(r, ctx);
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240 }
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241
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242 return ngx_http_range_multipart_header(r, ctx);
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636
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243
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244 case NGX_HTTP_RANGE_NOT_SATISFIABLE:
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245 return ngx_http_range_not_satisfiable(r);
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390
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246
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636
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247 case NGX_ERROR:
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248 return NGX_ERROR;
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249
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250 default: /* NGX_DECLINED */
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251 break;
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390
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252 }
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253
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254 next_filter:
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255
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256 r->headers_out.accept_ranges = ngx_list_push(&r->headers_out.headers);
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257 if (r->headers_out.accept_ranges == NULL) {
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258 return NGX_ERROR;
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259 }
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260
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261 r->headers_out.accept_ranges->hash = 1;
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570
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262 ngx_str_set(&r->headers_out.accept_ranges->key, "Accept-Ranges");
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263 ngx_str_set(&r->headers_out.accept_ranges->value, "bytes");
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390
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264
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265 return ngx_http_next_header_filter(r);
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266 }
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267
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268
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636
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269 static ngx_int_t
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270 ngx_http_range_parse(ngx_http_request_t *r, ngx_http_range_filter_ctx_t *ctx,
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271 ngx_uint_t ranges)
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390
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272 {
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273 u_char *p;
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636
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274 off_t start, end, size, content_length;
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390
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275 ngx_uint_t suffix;
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276 ngx_http_range_t *range;
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277
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50
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278 p = r->headers_in.range->value.data + 6;
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636
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279 size = 0;
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280 content_length = r->headers_out.content_length_n;
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50
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281
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282 for ( ;; ) {
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283 start = 0;
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284 end = 0;
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285 suffix = 0;
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286
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287 while (*p == ' ') { p++; }
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288
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289 if (*p != '-') {
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290 if (*p < '0' || *p > '9') {
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390
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291 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
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50
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292 }
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293
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294 while (*p >= '0' && *p <= '9') {
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295 start = start * 10 + *p++ - '0';
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296 }
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297
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298 while (*p == ' ') { p++; }
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299
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300 if (*p++ != '-') {
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390
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301 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
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50
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302 }
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303
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304 while (*p == ' ') { p++; }
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305
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306 if (*p == ',' || *p == '\0') {
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636
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307 end = content_length;
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308 goto found;
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309 }
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310
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311 } else {
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312 suffix = 1;
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313 p++;
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314 }
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315
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316 if (*p < '0' || *p > '9') {
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390
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317 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
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50
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318 }
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319
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320 while (*p >= '0' && *p <= '9') {
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321 end = end * 10 + *p++ - '0';
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322 }
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323
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324 while (*p == ' ') { p++; }
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325
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326 if (*p != ',' && *p != '\0') {
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390
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327 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
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50
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328 }
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329
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330 if (suffix) {
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636
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331 start = content_length - end;
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332 end = content_length - 1;
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50
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333 }
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334
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636
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335 if (end >= content_length) {
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336 end = content_length;
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337
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338 } else {
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339 end++;
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50
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340 }
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341
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636
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342 found:
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50
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343
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636
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344 if (start < end) {
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345 range = ngx_array_push(&ctx->ranges);
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346 if (range == NULL) {
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347 return NGX_ERROR;
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348 }
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50
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349
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636
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350 range->start = start;
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351 range->end = end;
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50
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352
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636
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353 size += end - start;
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354
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355 if (ranges-- == 0) {
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356 return NGX_DECLINED;
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357 }
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50
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358 }
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359
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360 if (*p++ != ',') {
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636
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361 break;
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50
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362 }
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363 }
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636
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364
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365 if (ctx->ranges.nelts == 0) {
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366 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
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367 }
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368
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369 if (size > content_length) {
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370 return NGX_DECLINED;
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371 }
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372
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373 return NGX_OK;
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390
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374 }
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375
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376
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377 static ngx_int_t
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378 ngx_http_range_singlepart_header(ngx_http_request_t *r,
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379 ngx_http_range_filter_ctx_t *ctx)
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380 {
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381 ngx_table_elt_t *content_range;
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382 ngx_http_range_t *range;
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383
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384 content_range = ngx_list_push(&r->headers_out.headers);
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385 if (content_range == NULL) {
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386 return NGX_ERROR;
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387 }
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50
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388
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390
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389 r->headers_out.content_range = content_range;
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50
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390
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390
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391 content_range->hash = 1;
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570
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392 ngx_str_set(&content_range->key, "Content-Range");
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50
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393
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390
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394 content_range->value.data = ngx_pnalloc(r->pool,
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395 sizeof("bytes -/") - 1 + 3 * NGX_OFF_T_LEN);
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396 if (content_range->value.data == NULL) {
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397 return NGX_ERROR;
|
50
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398 }
|
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399
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390
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400 /* "Content-Range: bytes SSSS-EEEE/TTTT" header */
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50
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401
|
390
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402 range = ctx->ranges.elts;
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50
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403
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390
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404 content_range->value.len = ngx_sprintf(content_range->value.data,
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405 "bytes %O-%O/%O",
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406 range->start, range->end - 1,
|
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407 r->headers_out.content_length_n)
|
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408 - content_range->value.data;
|
50
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409
|
390
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410 r->headers_out.content_length_n = range->end - range->start;
|
50
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411
|
390
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412 if (r->headers_out.content_length) {
|
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413 r->headers_out.content_length->hash = 0;
|
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414 r->headers_out.content_length = NULL;
|
50
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415 }
|
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416
|
390
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417 return ngx_http_next_header_filter(r);
|
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418 }
|
50
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419
|
390
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420
|
|
421 static ngx_int_t
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422 ngx_http_range_multipart_header(ngx_http_request_t *r,
|
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423 ngx_http_range_filter_ctx_t *ctx)
|
|
424 {
|
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425 size_t len;
|
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426 ngx_uint_t i;
|
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427 ngx_http_range_t *range;
|
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428 ngx_atomic_uint_t boundary;
|
50
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429
|
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430 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN
|
|
431 + sizeof(CRLF "Content-Type: ") - 1
|
58
|
432 + r->headers_out.content_type.len
|
50
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433 + sizeof(CRLF "Content-Range: bytes ") - 1;
|
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434
|
|
435 if (r->headers_out.charset.len) {
|
|
436 len += sizeof("; charset=") - 1 + r->headers_out.charset.len;
|
|
437 }
|
|
438
|
382
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439 ctx->boundary_header.data = ngx_pnalloc(r->pool, len);
|
50
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440 if (ctx->boundary_header.data == NULL) {
|
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441 return NGX_ERROR;
|
|
442 }
|
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443
|
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444 boundary = ngx_next_temp_number(0);
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445
|
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446 /*
|
|
447 * The boundary header of the range:
|
|
448 * CRLF
|
|
449 * "--0123456789" CRLF
|
|
450 * "Content-Type: image/jpeg" CRLF
|
|
451 * "Content-Range: bytes "
|
|
452 */
|
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453
|
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454 if (r->headers_out.charset.len) {
|
|
455 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data,
|
|
456 CRLF "--%0muA" CRLF
|
|
457 "Content-Type: %V; charset=%V" CRLF
|
|
458 "Content-Range: bytes ",
|
|
459 boundary,
|
58
|
460 &r->headers_out.content_type,
|
50
|
461 &r->headers_out.charset)
|
|
462 - ctx->boundary_header.data;
|
|
463
|
|
464 r->headers_out.charset.len = 0;
|
|
465
|
390
|
466 } else if (r->headers_out.content_type.len) {
|
50
|
467 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data,
|
|
468 CRLF "--%0muA" CRLF
|
|
469 "Content-Type: %V" CRLF
|
|
470 "Content-Range: bytes ",
|
|
471 boundary,
|
58
|
472 &r->headers_out.content_type)
|
50
|
473 - ctx->boundary_header.data;
|
390
|
474
|
|
475 } else {
|
|
476 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data,
|
|
477 CRLF "--%0muA" CRLF
|
|
478 "Content-Range: bytes ",
|
|
479 boundary)
|
|
480 - ctx->boundary_header.data;
|
50
|
481 }
|
|
482
|
58
|
483 r->headers_out.content_type.data =
|
382
|
484 ngx_pnalloc(r->pool,
|
|
485 sizeof("Content-Type: multipart/byteranges; boundary=") - 1
|
|
486 + NGX_ATOMIC_T_LEN);
|
50
|
487
|
58
|
488 if (r->headers_out.content_type.data == NULL) {
|
50
|
489 return NGX_ERROR;
|
|
490 }
|
|
491
|
494
|
492 r->headers_out.content_type_lowcase = NULL;
|
|
493
|
50
|
494 /* "Content-Type: multipart/byteranges; boundary=0123456789" */
|
|
495
|
58
|
496 r->headers_out.content_type.len =
|
|
497 ngx_sprintf(r->headers_out.content_type.data,
|
50
|
498 "multipart/byteranges; boundary=%0muA",
|
|
499 boundary)
|
58
|
500 - r->headers_out.content_type.data;
|
50
|
501
|
494
|
502 r->headers_out.content_type_len = r->headers_out.content_type.len;
|
50
|
503
|
|
504 /* the size of the last boundary CRLF "--0123456789--" CRLF */
|
|
505
|
|
506 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN + sizeof("--" CRLF) - 1;
|
|
507
|
272
|
508 range = ctx->ranges.elts;
|
|
509 for (i = 0; i < ctx->ranges.nelts; i++) {
|
50
|
510
|
|
511 /* the size of the range: "SSSS-EEEE/TTTT" CRLF CRLF */
|
|
512
|
|
513 range[i].content_range.data =
|
382
|
514 ngx_pnalloc(r->pool, 3 * NGX_OFF_T_LEN + 2 + 4);
|
50
|
515
|
|
516 if (range[i].content_range.data == NULL) {
|
|
517 return NGX_ERROR;
|
|
518 }
|
|
519
|
|
520 range[i].content_range.len = ngx_sprintf(range[i].content_range.data,
|
|
521 "%O-%O/%O" CRLF CRLF,
|
|
522 range[i].start, range[i].end - 1,
|
|
523 r->headers_out.content_length_n)
|
|
524 - range[i].content_range.data;
|
|
525
|
|
526 len += ctx->boundary_header.len + range[i].content_range.len
|
|
527 + (size_t) (range[i].end - range[i].start);
|
|
528 }
|
|
529
|
|
530 r->headers_out.content_length_n = len;
|
272
|
531
|
|
532 if (r->headers_out.content_length) {
|
|
533 r->headers_out.content_length->hash = 0;
|
|
534 r->headers_out.content_length = NULL;
|
|
535 }
|
50
|
536
|
|
537 return ngx_http_next_header_filter(r);
|
390
|
538 }
|
346
|
539
|
|
540
|
390
|
541 static ngx_int_t
|
|
542 ngx_http_range_not_satisfiable(ngx_http_request_t *r)
|
|
543 {
|
|
544 ngx_table_elt_t *content_range;
|
|
545
|
|
546 r->headers_out.status = NGX_HTTP_RANGE_NOT_SATISFIABLE;
|
|
547
|
|
548 content_range = ngx_list_push(&r->headers_out.headers);
|
|
549 if (content_range == NULL) {
|
346
|
550 return NGX_ERROR;
|
|
551 }
|
|
552
|
390
|
553 r->headers_out.content_range = content_range;
|
|
554
|
|
555 content_range->hash = 1;
|
570
|
556 ngx_str_set(&content_range->key, "Content-Range");
|
346
|
557
|
390
|
558 content_range->value.data = ngx_pnalloc(r->pool,
|
|
559 sizeof("bytes */") - 1 + NGX_OFF_T_LEN);
|
|
560 if (content_range->value.data == NULL) {
|
|
561 return NGX_ERROR;
|
|
562 }
|
|
563
|
|
564 content_range->value.len = ngx_sprintf(content_range->value.data,
|
|
565 "bytes */%O",
|
|
566 r->headers_out.content_length_n)
|
|
567 - content_range->value.data;
|
|
568
|
|
569 ngx_http_clear_content_length(r);
|
|
570
|
|
571 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
|
50
|
572 }
|
|
573
|
|
574
|
|
575 static ngx_int_t
|
|
576 ngx_http_range_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
|
|
577 {
|
|
578 ngx_http_range_filter_ctx_t *ctx;
|
|
579
|
272
|
580 if (in == NULL) {
|
|
581 return ngx_http_next_body_filter(r, in);
|
|
582 }
|
|
583
|
|
584 ctx = ngx_http_get_module_ctx(r, ngx_http_range_body_filter_module);
|
|
585
|
|
586 if (ctx == NULL) {
|
|
587 return ngx_http_next_body_filter(r, in);
|
|
588 }
|
|
589
|
390
|
590 if (ctx->ranges.nelts == 1) {
|
|
591 return ngx_http_range_singlepart_body(r, ctx, in);
|
|
592 }
|
|
593
|
|
594 /*
|
|
595 * multipart ranges are supported only if whole body is in a single buffer
|
|
596 */
|
272
|
597
|
|
598 if (ngx_buf_special(in->buf)) {
|
50
|
599 return ngx_http_next_body_filter(r, in);
|
|
600 }
|
|
601
|
390
|
602 if (ngx_http_range_test_overlapped(r, ctx, in) != NGX_OK) {
|
|
603 return NGX_ERROR;
|
|
604 }
|
|
605
|
|
606 return ngx_http_range_multipart_body(r, ctx, in);
|
|
607 }
|
|
608
|
|
609
|
|
610 static ngx_int_t
|
|
611 ngx_http_range_test_overlapped(ngx_http_request_t *r,
|
|
612 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in)
|
|
613 {
|
|
614 off_t start, last;
|
|
615 ngx_buf_t *buf;
|
|
616 ngx_uint_t i;
|
|
617 ngx_http_range_t *range;
|
|
618
|
272
|
619 if (ctx->offset) {
|
|
620 goto overlapped;
|
|
621 }
|
|
622
|
390
|
623 buf = in->buf;
|
272
|
624
|
|
625 if (!buf->last_buf) {
|
662
|
626 start = ctx->offset;
|
|
627 last = ctx->offset + ngx_buf_size(buf);
|
272
|
628
|
390
|
629 range = ctx->ranges.elts;
|
272
|
630 for (i = 0; i < ctx->ranges.nelts; i++) {
|
|
631 if (start > range[i].start || last < range[i].end) {
|
|
632 goto overlapped;
|
|
633 }
|
|
634 }
|
|
635 }
|
|
636
|
|
637 ctx->offset = ngx_buf_size(buf);
|
|
638
|
390
|
639 return NGX_OK;
|
|
640
|
|
641 overlapped:
|
|
642
|
|
643 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
644 "range in overlapped buffers");
|
|
645
|
|
646 return NGX_ERROR;
|
|
647 }
|
|
648
|
|
649
|
|
650 static ngx_int_t
|
|
651 ngx_http_range_singlepart_body(ngx_http_request_t *r,
|
|
652 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in)
|
|
653 {
|
|
654 off_t start, last;
|
|
655 ngx_buf_t *buf;
|
|
656 ngx_chain_t *out, *cl, **ll;
|
|
657 ngx_http_range_t *range;
|
|
658
|
|
659 out = NULL;
|
|
660 ll = &out;
|
|
661 range = ctx->ranges.elts;
|
50
|
662
|
390
|
663 for (cl = in; cl; cl = cl->next) {
|
|
664
|
|
665 buf = cl->buf;
|
|
666
|
|
667 start = ctx->offset;
|
|
668 last = ctx->offset + ngx_buf_size(buf);
|
|
669
|
|
670 ctx->offset = last;
|
|
671
|
|
672 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
673 "http range body buf: %O-%O", start, last);
|
|
674
|
|
675 if (ngx_buf_special(buf)) {
|
|
676 *ll = cl;
|
|
677 ll = &cl->next;
|
|
678 continue;
|
|
679 }
|
|
680
|
|
681 if (range->end <= start || range->start >= last) {
|
|
682
|
|
683 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
684 "http range body skip");
|
|
685
|
412
|
686 if (buf->in_file) {
|
|
687 buf->file_pos = buf->file_last;
|
|
688 }
|
|
689
|
390
|
690 buf->pos = buf->last;
|
412
|
691 buf->sync = 1;
|
|
692
|
390
|
693 continue;
|
272
|
694 }
|
50
|
695
|
390
|
696 if (range->start > start) {
|
|
697
|
|
698 if (buf->in_file) {
|
|
699 buf->file_pos += range->start - start;
|
|
700 }
|
|
701
|
|
702 if (ngx_buf_in_memory(buf)) {
|
|
703 buf->pos += (size_t) (range->start - start);
|
|
704 }
|
50
|
705 }
|
|
706
|
390
|
707 if (range->end <= last) {
|
|
708
|
|
709 if (buf->in_file) {
|
|
710 buf->file_last -= last - range->end;
|
|
711 }
|
|
712
|
|
713 if (ngx_buf_in_memory(buf)) {
|
|
714 buf->last -= (size_t) (last - range->end);
|
|
715 }
|
|
716
|
|
717 buf->last_buf = 1;
|
|
718 *ll = cl;
|
|
719 cl->next = NULL;
|
|
720
|
|
721 break;
|
|
722 }
|
|
723
|
|
724 *ll = cl;
|
|
725 ll = &cl->next;
|
272
|
726 }
|
50
|
727
|
390
|
728 if (out == NULL) {
|
|
729 return NGX_OK;
|
|
730 }
|
|
731
|
|
732 return ngx_http_next_body_filter(r, out);
|
|
733 }
|
|
734
|
|
735
|
|
736 static ngx_int_t
|
|
737 ngx_http_range_multipart_body(ngx_http_request_t *r,
|
|
738 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in)
|
|
739 {
|
|
740 ngx_buf_t *b, *buf;
|
|
741 ngx_uint_t i;
|
|
742 ngx_chain_t *out, *hcl, *rcl, *dcl, **ll;
|
|
743 ngx_http_range_t *range;
|
|
744
|
272
|
745 ll = &out;
|
390
|
746 buf = in->buf;
|
|
747 range = ctx->ranges.elts;
|
272
|
748
|
|
749 for (i = 0; i < ctx->ranges.nelts; i++) {
|
50
|
750
|
272
|
751 /*
|
|
752 * The boundary header of the range:
|
|
753 * CRLF
|
|
754 * "--0123456789" CRLF
|
|
755 * "Content-Type: image/jpeg" CRLF
|
|
756 * "Content-Range: bytes "
|
|
757 */
|
50
|
758
|
272
|
759 b = ngx_calloc_buf(r->pool);
|
|
760 if (b == NULL) {
|
|
761 return NGX_ERROR;
|
|
762 }
|
50
|
763
|
272
|
764 b->memory = 1;
|
|
765 b->pos = ctx->boundary_header.data;
|
|
766 b->last = ctx->boundary_header.data + ctx->boundary_header.len;
|
50
|
767
|
272
|
768 hcl = ngx_alloc_chain_link(r->pool);
|
|
769 if (hcl == NULL) {
|
|
770 return NGX_ERROR;
|
|
771 }
|
50
|
772
|
272
|
773 hcl->buf = b;
|
50
|
774
|
|
775
|
272
|
776 /* "SSSS-EEEE/TTTT" CRLF CRLF */
|
50
|
777
|
|
778 b = ngx_calloc_buf(r->pool);
|
|
779 if (b == NULL) {
|
|
780 return NGX_ERROR;
|
|
781 }
|
|
782
|
|
783 b->temporary = 1;
|
272
|
784 b->pos = range[i].content_range.data;
|
|
785 b->last = range[i].content_range.data + range[i].content_range.len;
|
|
786
|
|
787 rcl = ngx_alloc_chain_link(r->pool);
|
|
788 if (rcl == NULL) {
|
|
789 return NGX_ERROR;
|
|
790 }
|
|
791
|
|
792 rcl->buf = b;
|
|
793
|
|
794
|
|
795 /* the range data */
|
|
796
|
|
797 b = ngx_calloc_buf(r->pool);
|
|
798 if (b == NULL) {
|
|
799 return NGX_ERROR;
|
|
800 }
|
50
|
801
|
272
|
802 b->in_file = buf->in_file;
|
|
803 b->temporary = buf->temporary;
|
|
804 b->memory = buf->memory;
|
|
805 b->mmap = buf->mmap;
|
|
806 b->file = buf->file;
|
|
807
|
|
808 if (buf->in_file) {
|
662
|
809 b->file_pos = buf->file_pos + range[i].start;
|
|
810 b->file_last = buf->file_pos + range[i].end;
|
272
|
811 }
|
|
812
|
|
813 if (ngx_buf_in_memory(buf)) {
|
662
|
814 b->pos = buf->pos + (size_t) range[i].start;
|
|
815 b->last = buf->pos + (size_t) range[i].end;
|
272
|
816 }
|
|
817
|
|
818 dcl = ngx_alloc_chain_link(r->pool);
|
|
819 if (dcl == NULL) {
|
50
|
820 return NGX_ERROR;
|
|
821 }
|
|
822
|
272
|
823 dcl->buf = b;
|
50
|
824
|
|
825 *ll = hcl;
|
272
|
826 hcl->next = rcl;
|
|
827 rcl->next = dcl;
|
|
828 ll = &dcl->next;
|
|
829 }
|
50
|
830
|
272
|
831 /* the last boundary CRLF "--0123456789--" CRLF */
|
|
832
|
|
833 b = ngx_calloc_buf(r->pool);
|
|
834 if (b == NULL) {
|
|
835 return NGX_ERROR;
|
|
836 }
|
|
837
|
|
838 b->temporary = 1;
|
|
839 b->last_buf = 1;
|
|
840
|
382
|
841 b->pos = ngx_pnalloc(r->pool, sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN
|
|
842 + sizeof("--" CRLF) - 1);
|
272
|
843 if (b->pos == NULL) {
|
|
844 return NGX_ERROR;
|
50
|
845 }
|
|
846
|
300
|
847 b->last = ngx_cpymem(b->pos, ctx->boundary_header.data,
|
|
848 sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN);
|
272
|
849 *b->last++ = '-'; *b->last++ = '-';
|
|
850 *b->last++ = CR; *b->last++ = LF;
|
|
851
|
|
852 hcl = ngx_alloc_chain_link(r->pool);
|
|
853 if (hcl == NULL) {
|
|
854 return NGX_ERROR;
|
|
855 }
|
50
|
856
|
272
|
857 hcl->buf = b;
|
|
858 hcl->next = NULL;
|
|
859
|
|
860 *ll = hcl;
|
|
861
|
|
862 return ngx_http_next_body_filter(r, out);
|
50
|
863 }
|
|
864
|
|
865
|
|
866 static ngx_int_t
|
230
|
867 ngx_http_range_header_filter_init(ngx_conf_t *cf)
|
50
|
868 {
|
|
869 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
870 ngx_http_top_header_filter = ngx_http_range_header_filter;
|
|
871
|
|
872 return NGX_OK;
|
|
873 }
|
|
874
|
|
875
|
|
876 static ngx_int_t
|
230
|
877 ngx_http_range_body_filter_init(ngx_conf_t *cf)
|
50
|
878 {
|
|
879 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
880 ngx_http_top_body_filter = ngx_http_range_body_filter;
|
|
881
|
|
882 return NGX_OK;
|
|
883 }
|