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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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390
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61 ngx_int_t ngx_http_range_parse(ngx_http_request_t *r,
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62 ngx_http_range_filter_ctx_t *ctx);
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63 static ngx_int_t ngx_http_range_singlepart_header(ngx_http_request_t *r,
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64 ngx_http_range_filter_ctx_t *ctx);
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65 static ngx_int_t ngx_http_range_multipart_header(ngx_http_request_t *r,
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66 ngx_http_range_filter_ctx_t *ctx);
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67 static ngx_int_t ngx_http_range_not_satisfiable(ngx_http_request_t *r);
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68 static ngx_int_t ngx_http_range_test_overlapped(ngx_http_request_t *r,
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69 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in);
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70 static ngx_int_t ngx_http_range_singlepart_body(ngx_http_request_t *r,
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71 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in);
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72 static ngx_int_t ngx_http_range_multipart_body(ngx_http_request_t *r,
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73 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in);
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74
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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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50
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149 ngx_int_t rc;
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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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161 if (r->headers_in.range == NULL
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162 || r->headers_in.range->value.len < 7
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286
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163 || ngx_strncasecmp(r->headers_in.range->value.data,
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164 (u_char *) "bytes=", 6)
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165 != 0)
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50
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166 {
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346
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167 goto next_filter;
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168 }
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169
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170 if (r->headers_in.if_range && r->headers_out.last_modified_time != -1) {
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171
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172 if_range = ngx_http_parse_time(r->headers_in.if_range->value.data,
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173 r->headers_in.if_range->value.len);
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50
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174
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346
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175 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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176 "http ir:%d lm:%d",
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177 if_range, r->headers_out.last_modified_time);
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50
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178
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346
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179 if (if_range != r->headers_out.last_modified_time) {
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180 goto next_filter;
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181 }
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50
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182 }
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183
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272
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184 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_range_filter_ctx_t));
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185 if (ctx == NULL) {
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186 return NGX_ERROR;
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187 }
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188
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189 if (ngx_array_init(&ctx->ranges, r->pool, 1, sizeof(ngx_http_range_t))
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454
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190 != NGX_OK)
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50
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191 {
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192 return NGX_ERROR;
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193 }
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194
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390
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195 rc = ngx_http_range_parse(r, ctx);
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196
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197 if (rc == NGX_OK) {
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198
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199 ngx_http_set_ctx(r, ctx, ngx_http_range_body_filter_module);
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200
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201 r->headers_out.status = NGX_HTTP_PARTIAL_CONTENT;
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464
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202 r->headers_out.status_line.len = 0;
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390
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203
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204 if (ctx->ranges.nelts == 1) {
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205 return ngx_http_range_singlepart_header(r, ctx);
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206 }
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207
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208 return ngx_http_range_multipart_header(r, ctx);
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209 }
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210
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211 if (rc == NGX_HTTP_RANGE_NOT_SATISFIABLE) {
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212 return ngx_http_range_not_satisfiable(r);
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213 }
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214
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215 /* rc == NGX_ERROR */
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216
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217 return rc;
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218
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219 next_filter:
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220
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221 r->headers_out.accept_ranges = ngx_list_push(&r->headers_out.headers);
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222 if (r->headers_out.accept_ranges == NULL) {
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223 return NGX_ERROR;
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224 }
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225
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226 r->headers_out.accept_ranges->hash = 1;
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227 r->headers_out.accept_ranges->key.len = sizeof("Accept-Ranges") - 1;
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228 r->headers_out.accept_ranges->key.data = (u_char *) "Accept-Ranges";
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229 r->headers_out.accept_ranges->value.len = sizeof("bytes") - 1;
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230 r->headers_out.accept_ranges->value.data = (u_char *) "bytes";
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231
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232 return ngx_http_next_header_filter(r);
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233 }
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234
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235
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236 ngx_int_t
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237 ngx_http_range_parse(ngx_http_request_t *r, ngx_http_range_filter_ctx_t *ctx)
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238 {
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239 u_char *p;
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240 off_t start, end;
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241 ngx_uint_t suffix;
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242 ngx_http_range_t *range;
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243
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50
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244 p = r->headers_in.range->value.data + 6;
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245
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246 for ( ;; ) {
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247 start = 0;
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248 end = 0;
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249 suffix = 0;
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250
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251 while (*p == ' ') { p++; }
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252
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253 if (*p != '-') {
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254 if (*p < '0' || *p > '9') {
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390
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255 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
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50
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256 }
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257
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258 while (*p >= '0' && *p <= '9') {
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259 start = start * 10 + *p++ - '0';
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260 }
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261
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262 while (*p == ' ') { p++; }
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263
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264 if (*p++ != '-') {
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390
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265 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
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50
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266 }
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267
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268 if (start >= r->headers_out.content_length_n) {
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390
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269 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
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50
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270 }
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271
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272 while (*p == ' ') { p++; }
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273
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274 if (*p == ',' || *p == '\0') {
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272
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275 range = ngx_array_push(&ctx->ranges);
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50
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276 if (range == NULL) {
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277 return NGX_ERROR;
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278 }
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279
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280 range->start = start;
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281 range->end = r->headers_out.content_length_n;
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282
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283 if (*p++ != ',') {
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390
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284 return NGX_OK;
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50
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285 }
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286
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287 continue;
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288 }
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289
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290 } else {
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291 suffix = 1;
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292 p++;
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293 }
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294
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295 if (*p < '0' || *p > '9') {
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390
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296 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
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50
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297 }
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298
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299 while (*p >= '0' && *p <= '9') {
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300 end = end * 10 + *p++ - '0';
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301 }
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302
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303 while (*p == ' ') { p++; }
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304
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305 if (*p != ',' && *p != '\0') {
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390
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306 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
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50
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307 }
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308
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309 if (suffix) {
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310 start = r->headers_out.content_length_n - end;
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311 end = r->headers_out.content_length_n - 1;
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312 }
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313
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314 if (start > end) {
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390
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315 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
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50
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316 }
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317
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272
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318 range = ngx_array_push(&ctx->ranges);
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50
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319 if (range == NULL) {
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320 return NGX_ERROR;
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321 }
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322
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323 range->start = start;
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324
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325 if (end >= r->headers_out.content_length_n) {
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326 /*
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327 * Download Accelerator sends the last byte position
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328 * that equals to the file length
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329 */
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330 range->end = r->headers_out.content_length_n;
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331
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332 } else {
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333 range->end = end + 1;
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334 }
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335
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336 if (*p++ != ',') {
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390
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337 return NGX_OK;
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50
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338 }
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339 }
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390
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340 }
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341
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342
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343 static ngx_int_t
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344 ngx_http_range_singlepart_header(ngx_http_request_t *r,
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345 ngx_http_range_filter_ctx_t *ctx)
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346 {
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347 ngx_table_elt_t *content_range;
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348 ngx_http_range_t *range;
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349
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350 content_range = ngx_list_push(&r->headers_out.headers);
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351 if (content_range == NULL) {
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352 return NGX_ERROR;
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353 }
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50
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354
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390
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355 r->headers_out.content_range = content_range;
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50
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356
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390
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357 content_range->hash = 1;
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358 content_range->key.len = sizeof("Content-Range") - 1;
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359 content_range->key.data = (u_char *) "Content-Range";
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50
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360
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390
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361 content_range->value.data = ngx_pnalloc(r->pool,
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362 sizeof("bytes -/") - 1 + 3 * NGX_OFF_T_LEN);
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363 if (content_range->value.data == NULL) {
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364 return NGX_ERROR;
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50
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365 }
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366
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390
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367 /* "Content-Range: bytes SSSS-EEEE/TTTT" header */
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50
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368
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390
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369 range = ctx->ranges.elts;
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50
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370
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390
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371 content_range->value.len = ngx_sprintf(content_range->value.data,
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372 "bytes %O-%O/%O",
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373 range->start, range->end - 1,
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374 r->headers_out.content_length_n)
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375 - content_range->value.data;
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50
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376
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390
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377 r->headers_out.content_length_n = range->end - range->start;
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50
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378
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390
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379 if (r->headers_out.content_length) {
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380 r->headers_out.content_length->hash = 0;
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381 r->headers_out.content_length = NULL;
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50
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382 }
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383
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390
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384 return ngx_http_next_header_filter(r);
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385 }
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50
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386
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390
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387
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388 static ngx_int_t
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389 ngx_http_range_multipart_header(ngx_http_request_t *r,
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390 ngx_http_range_filter_ctx_t *ctx)
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391 {
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392 size_t len;
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393 ngx_uint_t i;
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394 ngx_http_range_t *range;
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395 ngx_atomic_uint_t boundary;
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50
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396
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397 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN
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398 + sizeof(CRLF "Content-Type: ") - 1
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58
|
399 + r->headers_out.content_type.len
|
|
50
|
400 + sizeof(CRLF "Content-Range: bytes ") - 1;
|
|
|
401
|
|
|
402 if (r->headers_out.charset.len) {
|
|
|
403 len += sizeof("; charset=") - 1 + r->headers_out.charset.len;
|
|
|
404 }
|
|
|
405
|
|
382
|
406 ctx->boundary_header.data = ngx_pnalloc(r->pool, len);
|
|
50
|
407 if (ctx->boundary_header.data == NULL) {
|
|
|
408 return NGX_ERROR;
|
|
|
409 }
|
|
|
410
|
|
|
411 boundary = ngx_next_temp_number(0);
|
|
|
412
|
|
|
413 /*
|
|
|
414 * The boundary header of the range:
|
|
|
415 * CRLF
|
|
|
416 * "--0123456789" CRLF
|
|
|
417 * "Content-Type: image/jpeg" CRLF
|
|
|
418 * "Content-Range: bytes "
|
|
|
419 */
|
|
|
420
|
|
|
421 if (r->headers_out.charset.len) {
|
|
|
422 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data,
|
|
|
423 CRLF "--%0muA" CRLF
|
|
|
424 "Content-Type: %V; charset=%V" CRLF
|
|
|
425 "Content-Range: bytes ",
|
|
|
426 boundary,
|
|
58
|
427 &r->headers_out.content_type,
|
|
50
|
428 &r->headers_out.charset)
|
|
|
429 - ctx->boundary_header.data;
|
|
|
430
|
|
|
431 r->headers_out.charset.len = 0;
|
|
|
432
|
|
390
|
433 } else if (r->headers_out.content_type.len) {
|
|
50
|
434 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data,
|
|
|
435 CRLF "--%0muA" CRLF
|
|
|
436 "Content-Type: %V" CRLF
|
|
|
437 "Content-Range: bytes ",
|
|
|
438 boundary,
|
|
58
|
439 &r->headers_out.content_type)
|
|
50
|
440 - ctx->boundary_header.data;
|
|
390
|
441
|
|
|
442 } else {
|
|
|
443 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data,
|
|
|
444 CRLF "--%0muA" CRLF
|
|
|
445 "Content-Range: bytes ",
|
|
|
446 boundary)
|
|
|
447 - ctx->boundary_header.data;
|
|
50
|
448 }
|
|
|
449
|
|
58
|
450 r->headers_out.content_type.data =
|
|
382
|
451 ngx_pnalloc(r->pool,
|
|
|
452 sizeof("Content-Type: multipart/byteranges; boundary=") - 1
|
|
|
453 + NGX_ATOMIC_T_LEN);
|
|
50
|
454
|
|
58
|
455 if (r->headers_out.content_type.data == NULL) {
|
|
50
|
456 return NGX_ERROR;
|
|
|
457 }
|
|
|
458
|
|
|
459 /* "Content-Type: multipart/byteranges; boundary=0123456789" */
|
|
|
460
|
|
58
|
461 r->headers_out.content_type.len =
|
|
|
462 ngx_sprintf(r->headers_out.content_type.data,
|
|
50
|
463 "multipart/byteranges; boundary=%0muA",
|
|
|
464 boundary)
|
|
58
|
465 - r->headers_out.content_type.data;
|
|
50
|
466
|
|
|
467
|
|
|
468 /* the size of the last boundary CRLF "--0123456789--" CRLF */
|
|
|
469
|
|
|
470 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN + sizeof("--" CRLF) - 1;
|
|
|
471
|
|
272
|
472 range = ctx->ranges.elts;
|
|
|
473 for (i = 0; i < ctx->ranges.nelts; i++) {
|
|
50
|
474
|
|
|
475 /* the size of the range: "SSSS-EEEE/TTTT" CRLF CRLF */
|
|
|
476
|
|
|
477 range[i].content_range.data =
|
|
382
|
478 ngx_pnalloc(r->pool, 3 * NGX_OFF_T_LEN + 2 + 4);
|
|
50
|
479
|
|
|
480 if (range[i].content_range.data == NULL) {
|
|
|
481 return NGX_ERROR;
|
|
|
482 }
|
|
|
483
|
|
|
484 range[i].content_range.len = ngx_sprintf(range[i].content_range.data,
|
|
|
485 "%O-%O/%O" CRLF CRLF,
|
|
|
486 range[i].start, range[i].end - 1,
|
|
|
487 r->headers_out.content_length_n)
|
|
|
488 - range[i].content_range.data;
|
|
|
489
|
|
|
490 len += ctx->boundary_header.len + range[i].content_range.len
|
|
|
491 + (size_t) (range[i].end - range[i].start);
|
|
|
492 }
|
|
|
493
|
|
|
494 r->headers_out.content_length_n = len;
|
|
272
|
495
|
|
|
496 if (r->headers_out.content_length) {
|
|
|
497 r->headers_out.content_length->hash = 0;
|
|
|
498 r->headers_out.content_length = NULL;
|
|
|
499 }
|
|
50
|
500
|
|
|
501 return ngx_http_next_header_filter(r);
|
|
390
|
502 }
|
|
346
|
503
|
|
|
504
|
|
390
|
505 static ngx_int_t
|
|
|
506 ngx_http_range_not_satisfiable(ngx_http_request_t *r)
|
|
|
507 {
|
|
|
508 ngx_table_elt_t *content_range;
|
|
|
509
|
|
|
510 r->headers_out.status = NGX_HTTP_RANGE_NOT_SATISFIABLE;
|
|
|
511
|
|
|
512 content_range = ngx_list_push(&r->headers_out.headers);
|
|
|
513 if (content_range == NULL) {
|
|
346
|
514 return NGX_ERROR;
|
|
|
515 }
|
|
|
516
|
|
390
|
517 r->headers_out.content_range = content_range;
|
|
|
518
|
|
|
519 content_range->hash = 1;
|
|
|
520 content_range->key.len = sizeof("Content-Range") - 1;
|
|
|
521 content_range->key.data = (u_char *) "Content-Range";
|
|
346
|
522
|
|
390
|
523 content_range->value.data = ngx_pnalloc(r->pool,
|
|
|
524 sizeof("bytes */") - 1 + NGX_OFF_T_LEN);
|
|
|
525 if (content_range->value.data == NULL) {
|
|
|
526 return NGX_ERROR;
|
|
|
527 }
|
|
|
528
|
|
|
529 content_range->value.len = ngx_sprintf(content_range->value.data,
|
|
|
530 "bytes */%O",
|
|
|
531 r->headers_out.content_length_n)
|
|
|
532 - content_range->value.data;
|
|
|
533
|
|
|
534 ngx_http_clear_content_length(r);
|
|
|
535
|
|
|
536 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
|
|
50
|
537 }
|
|
|
538
|
|
|
539
|
|
|
540 static ngx_int_t
|
|
|
541 ngx_http_range_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
542 {
|
|
|
543 ngx_http_range_filter_ctx_t *ctx;
|
|
|
544
|
|
272
|
545 if (in == NULL) {
|
|
|
546 return ngx_http_next_body_filter(r, in);
|
|
|
547 }
|
|
|
548
|
|
|
549 ctx = ngx_http_get_module_ctx(r, ngx_http_range_body_filter_module);
|
|
|
550
|
|
|
551 if (ctx == NULL) {
|
|
|
552 return ngx_http_next_body_filter(r, in);
|
|
|
553 }
|
|
|
554
|
|
390
|
555 if (ctx->ranges.nelts == 1) {
|
|
|
556 return ngx_http_range_singlepart_body(r, ctx, in);
|
|
|
557 }
|
|
|
558
|
|
|
559 /*
|
|
|
560 * multipart ranges are supported only if whole body is in a single buffer
|
|
|
561 */
|
|
272
|
562
|
|
|
563 if (ngx_buf_special(in->buf)) {
|
|
50
|
564 return ngx_http_next_body_filter(r, in);
|
|
|
565 }
|
|
|
566
|
|
390
|
567 if (ngx_http_range_test_overlapped(r, ctx, in) != NGX_OK) {
|
|
|
568 return NGX_ERROR;
|
|
|
569 }
|
|
|
570
|
|
|
571 return ngx_http_range_multipart_body(r, ctx, in);
|
|
|
572 }
|
|
|
573
|
|
|
574
|
|
|
575 static ngx_int_t
|
|
|
576 ngx_http_range_test_overlapped(ngx_http_request_t *r,
|
|
|
577 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in)
|
|
|
578 {
|
|
|
579 off_t start, last;
|
|
|
580 ngx_buf_t *buf;
|
|
|
581 ngx_uint_t i;
|
|
|
582 ngx_http_range_t *range;
|
|
|
583
|
|
272
|
584 if (ctx->offset) {
|
|
|
585 goto overlapped;
|
|
|
586 }
|
|
|
587
|
|
390
|
588 buf = in->buf;
|
|
272
|
589
|
|
|
590 if (!buf->last_buf) {
|
|
|
591
|
|
|
592 if (buf->in_file) {
|
|
|
593 start = buf->file_pos + ctx->offset;
|
|
|
594 last = buf->file_last + ctx->offset;
|
|
|
595
|
|
|
596 } else {
|
|
|
597 start = buf->pos - buf->start + ctx->offset;
|
|
|
598 last = buf->last - buf->start + ctx->offset;
|
|
|
599 }
|
|
|
600
|
|
390
|
601 range = ctx->ranges.elts;
|
|
272
|
602 for (i = 0; i < ctx->ranges.nelts; i++) {
|
|
|
603 if (start > range[i].start || last < range[i].end) {
|
|
|
604 goto overlapped;
|
|
|
605 }
|
|
|
606 }
|
|
|
607 }
|
|
|
608
|
|
|
609 ctx->offset = ngx_buf_size(buf);
|
|
|
610
|
|
390
|
611 return NGX_OK;
|
|
|
612
|
|
|
613 overlapped:
|
|
|
614
|
|
|
615 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
616 "range in overlapped buffers");
|
|
|
617
|
|
|
618 return NGX_ERROR;
|
|
|
619 }
|
|
|
620
|
|
|
621
|
|
|
622 static ngx_int_t
|
|
|
623 ngx_http_range_singlepart_body(ngx_http_request_t *r,
|
|
|
624 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in)
|
|
|
625 {
|
|
|
626 off_t start, last;
|
|
|
627 ngx_buf_t *buf;
|
|
|
628 ngx_chain_t *out, *cl, **ll;
|
|
|
629 ngx_http_range_t *range;
|
|
|
630
|
|
|
631 out = NULL;
|
|
|
632 ll = &out;
|
|
|
633 range = ctx->ranges.elts;
|
|
50
|
634
|
|
390
|
635 for (cl = in; cl; cl = cl->next) {
|
|
|
636
|
|
|
637 buf = cl->buf;
|
|
|
638
|
|
|
639 start = ctx->offset;
|
|
|
640 last = ctx->offset + ngx_buf_size(buf);
|
|
|
641
|
|
|
642 ctx->offset = last;
|
|
|
643
|
|
|
644 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
645 "http range body buf: %O-%O", start, last);
|
|
|
646
|
|
|
647 if (ngx_buf_special(buf)) {
|
|
|
648 *ll = cl;
|
|
|
649 ll = &cl->next;
|
|
|
650 continue;
|
|
|
651 }
|
|
|
652
|
|
|
653 if (range->end <= start || range->start >= last) {
|
|
|
654
|
|
|
655 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
656 "http range body skip");
|
|
|
657
|
|
412
|
658 if (buf->in_file) {
|
|
|
659 buf->file_pos = buf->file_last;
|
|
|
660 }
|
|
|
661
|
|
390
|
662 buf->pos = buf->last;
|
|
412
|
663 buf->sync = 1;
|
|
|
664
|
|
390
|
665 continue;
|
|
272
|
666 }
|
|
50
|
667
|
|
390
|
668 if (range->start > start) {
|
|
|
669
|
|
|
670 if (buf->in_file) {
|
|
|
671 buf->file_pos += range->start - start;
|
|
|
672 }
|
|
|
673
|
|
|
674 if (ngx_buf_in_memory(buf)) {
|
|
|
675 buf->pos += (size_t) (range->start - start);
|
|
|
676 }
|
|
50
|
677 }
|
|
|
678
|
|
390
|
679 if (range->end <= last) {
|
|
|
680
|
|
|
681 if (buf->in_file) {
|
|
|
682 buf->file_last -= last - range->end;
|
|
|
683 }
|
|
|
684
|
|
|
685 if (ngx_buf_in_memory(buf)) {
|
|
|
686 buf->last -= (size_t) (last - range->end);
|
|
|
687 }
|
|
|
688
|
|
|
689 buf->last_buf = 1;
|
|
|
690 *ll = cl;
|
|
|
691 cl->next = NULL;
|
|
|
692
|
|
|
693 break;
|
|
|
694 }
|
|
|
695
|
|
|
696 *ll = cl;
|
|
|
697 ll = &cl->next;
|
|
272
|
698 }
|
|
50
|
699
|
|
390
|
700 if (out == NULL) {
|
|
|
701 return NGX_OK;
|
|
|
702 }
|
|
|
703
|
|
|
704 return ngx_http_next_body_filter(r, out);
|
|
|
705 }
|
|
|
706
|
|
|
707
|
|
|
708 static ngx_int_t
|
|
|
709 ngx_http_range_multipart_body(ngx_http_request_t *r,
|
|
|
710 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in)
|
|
|
711 {
|
|
464
|
712 off_t body_start;
|
|
390
|
713 ngx_buf_t *b, *buf;
|
|
|
714 ngx_uint_t i;
|
|
|
715 ngx_chain_t *out, *hcl, *rcl, *dcl, **ll;
|
|
|
716 ngx_http_range_t *range;
|
|
|
717
|
|
272
|
718 ll = &out;
|
|
390
|
719 buf = in->buf;
|
|
|
720 range = ctx->ranges.elts;
|
|
272
|
721
|
|
464
|
722 #if (NGX_HTTP_CACHE)
|
|
|
723 body_start = r->cached ? r->cache->body_start : 0;
|
|
|
724 #else
|
|
|
725 body_start = 0;
|
|
|
726 #endif
|
|
|
727
|
|
272
|
728 for (i = 0; i < ctx->ranges.nelts; i++) {
|
|
50
|
729
|
|
272
|
730 /*
|
|
|
731 * The boundary header of the range:
|
|
|
732 * CRLF
|
|
|
733 * "--0123456789" CRLF
|
|
|
734 * "Content-Type: image/jpeg" CRLF
|
|
|
735 * "Content-Range: bytes "
|
|
|
736 */
|
|
50
|
737
|
|
272
|
738 b = ngx_calloc_buf(r->pool);
|
|
|
739 if (b == NULL) {
|
|
|
740 return NGX_ERROR;
|
|
|
741 }
|
|
50
|
742
|
|
272
|
743 b->memory = 1;
|
|
|
744 b->pos = ctx->boundary_header.data;
|
|
|
745 b->last = ctx->boundary_header.data + ctx->boundary_header.len;
|
|
50
|
746
|
|
272
|
747 hcl = ngx_alloc_chain_link(r->pool);
|
|
|
748 if (hcl == NULL) {
|
|
|
749 return NGX_ERROR;
|
|
|
750 }
|
|
50
|
751
|
|
272
|
752 hcl->buf = b;
|
|
50
|
753
|
|
|
754
|
|
272
|
755 /* "SSSS-EEEE/TTTT" CRLF CRLF */
|
|
50
|
756
|
|
|
757 b = ngx_calloc_buf(r->pool);
|
|
|
758 if (b == NULL) {
|
|
|
759 return NGX_ERROR;
|
|
|
760 }
|
|
|
761
|
|
|
762 b->temporary = 1;
|
|
272
|
763 b->pos = range[i].content_range.data;
|
|
|
764 b->last = range[i].content_range.data + range[i].content_range.len;
|
|
|
765
|
|
|
766 rcl = ngx_alloc_chain_link(r->pool);
|
|
|
767 if (rcl == NULL) {
|
|
|
768 return NGX_ERROR;
|
|
|
769 }
|
|
|
770
|
|
|
771 rcl->buf = b;
|
|
|
772
|
|
|
773
|
|
|
774 /* the range data */
|
|
|
775
|
|
|
776 b = ngx_calloc_buf(r->pool);
|
|
|
777 if (b == NULL) {
|
|
|
778 return NGX_ERROR;
|
|
|
779 }
|
|
50
|
780
|
|
272
|
781 b->in_file = buf->in_file;
|
|
|
782 b->temporary = buf->temporary;
|
|
|
783 b->memory = buf->memory;
|
|
|
784 b->mmap = buf->mmap;
|
|
|
785 b->file = buf->file;
|
|
|
786
|
|
|
787 if (buf->in_file) {
|
|
464
|
788 b->file_pos = body_start + range[i].start;
|
|
|
789 b->file_last = body_start + range[i].end;
|
|
272
|
790 }
|
|
|
791
|
|
|
792 if (ngx_buf_in_memory(buf)) {
|
|
282
|
793 b->pos = buf->start + (size_t) range[i].start;
|
|
|
794 b->last = buf->start + (size_t) range[i].end;
|
|
272
|
795 }
|
|
|
796
|
|
|
797 dcl = ngx_alloc_chain_link(r->pool);
|
|
|
798 if (dcl == NULL) {
|
|
50
|
799 return NGX_ERROR;
|
|
|
800 }
|
|
|
801
|
|
272
|
802 dcl->buf = b;
|
|
50
|
803
|
|
|
804 *ll = hcl;
|
|
272
|
805 hcl->next = rcl;
|
|
|
806 rcl->next = dcl;
|
|
|
807 ll = &dcl->next;
|
|
|
808 }
|
|
50
|
809
|
|
272
|
810 /* the last boundary CRLF "--0123456789--" CRLF */
|
|
|
811
|
|
|
812 b = ngx_calloc_buf(r->pool);
|
|
|
813 if (b == NULL) {
|
|
|
814 return NGX_ERROR;
|
|
|
815 }
|
|
|
816
|
|
|
817 b->temporary = 1;
|
|
|
818 b->last_buf = 1;
|
|
|
819
|
|
382
|
820 b->pos = ngx_pnalloc(r->pool, sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN
|
|
|
821 + sizeof("--" CRLF) - 1);
|
|
272
|
822 if (b->pos == NULL) {
|
|
|
823 return NGX_ERROR;
|
|
50
|
824 }
|
|
|
825
|
|
300
|
826 b->last = ngx_cpymem(b->pos, ctx->boundary_header.data,
|
|
|
827 sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN);
|
|
272
|
828 *b->last++ = '-'; *b->last++ = '-';
|
|
|
829 *b->last++ = CR; *b->last++ = LF;
|
|
|
830
|
|
|
831 hcl = ngx_alloc_chain_link(r->pool);
|
|
|
832 if (hcl == NULL) {
|
|
|
833 return NGX_ERROR;
|
|
|
834 }
|
|
50
|
835
|
|
272
|
836 hcl->buf = b;
|
|
|
837 hcl->next = NULL;
|
|
|
838
|
|
|
839 *ll = hcl;
|
|
|
840
|
|
|
841 return ngx_http_next_body_filter(r, out);
|
|
50
|
842 }
|
|
|
843
|
|
|
844
|
|
|
845 static ngx_int_t
|
|
230
|
846 ngx_http_range_header_filter_init(ngx_conf_t *cf)
|
|
50
|
847 {
|
|
|
848 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
849 ngx_http_top_header_filter = ngx_http_range_header_filter;
|
|
|
850
|
|
|
851 return NGX_OK;
|
|
|
852 }
|
|
|
853
|
|
|
854
|
|
|
855 static ngx_int_t
|
|
230
|
856 ngx_http_range_body_filter_init(ngx_conf_t *cf)
|
|
50
|
857 {
|
|
|
858 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
859 ngx_http_top_body_filter = ngx_http_range_body_filter;
|
|
|
860
|
|
|
861 return NGX_OK;
|
|
|
862 }
|
