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