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