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