Mercurial > hg > ngx_http_bytes_filter_module

annotate ngx_http_bytes_filter_module.c @ 1:6b995d5251ec

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Implement bytes= argument parsing. The only known problem is that it doesn't reject 'bytes=-' as invalid (suffix byte range specification must contain suffix length per RFC 2616).
author Maxim Dounin <mdounin@mdounin.ru>
date Sat, 28 Jun 2008 20:20:50 +0400
parents 8aec31ab4d52
children 13a2fbcc8bc4
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0
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1
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2 /*
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3 * Copyright (C) Maxim Dounin
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4 */
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5
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6 #include <ngx_config.h>
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7 #include <ngx_core.h>
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8 #include <ngx_http.h>
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9
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10
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11 typedef struct {
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12 ngx_flag_t enable;
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13 } ngx_http_bytes_conf_t;
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14
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15
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16 typedef struct {
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17 off_t start;
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18 off_t end;
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19 } ngx_http_bytes_t;
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20
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21
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22 typedef struct {
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23 off_t offset;
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24 ngx_array_t ranges;
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25 } ngx_http_bytes_ctx_t;
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26
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27
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28 static void *ngx_http_bytes_create_conf(ngx_conf_t *cf);
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29 static char *ngx_http_bytes_merge_conf(ngx_conf_t *cf, void *parent,
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30 void *child);
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31 static ngx_int_t ngx_http_bytes_init(ngx_conf_t *cf);
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32
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33
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34 static ngx_command_t ngx_http_bytes_commands[] = {
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35
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36 { ngx_string("bytes"),
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37 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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38 ngx_conf_set_flag_slot,
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39 NGX_HTTP_LOC_CONF_OFFSET,
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40 offsetof(ngx_http_bytes_conf_t, enable),
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41 NULL },
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42
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43 ngx_null_command
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44 };
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45
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46
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47 static ngx_http_module_t ngx_http_bytes_module_ctx = {
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48 NULL, /* preconfiguration */
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49 ngx_http_bytes_init, /* postconfiguration */
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50
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51 NULL, /* create main configuration */
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52 NULL, /* init main configuration */
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53
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54 NULL, /* create server configuration */
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55 NULL, /* merge server configuration */
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56
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57 ngx_http_bytes_create_conf, /* create location configuration */
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58 ngx_http_bytes_merge_conf /* merge location configuration */
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59 };
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60
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61
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62 ngx_module_t ngx_http_bytes_filter_module = {
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63 NGX_MODULE_V1,
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64 &ngx_http_bytes_module_ctx, /* module context */
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65 ngx_http_bytes_commands, /* module directives */
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66 NGX_HTTP_MODULE, /* module type */
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67 NULL, /* init master */
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68 NULL, /* init module */
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69 NULL, /* init process */
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70 NULL, /* init thread */
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71 NULL, /* exit thread */
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72 NULL, /* exit process */
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73 NULL, /* exit master */
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74 NGX_MODULE_V1_PADDING
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75 };
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76
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77
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78 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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79 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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80
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81
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82 static ngx_int_t
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83 ngx_http_bytes_header_filter(ngx_http_request_t *r)
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84 {
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85 u_char *p, *last;
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86 off_t start, end;
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87 ngx_uint_t suffix, bad;
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88 ngx_http_bytes_t *range;
0
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89 ngx_http_bytes_conf_t *conf;
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90 ngx_http_bytes_ctx_t *ctx;
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91 enum {
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92 sw_start = 0,
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93 sw_first_byte_pos,
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94 sw_first_byte_pos_n,
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95 sw_last_byte_pos,
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96 sw_last_byte_pos_n,
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97 sw_done
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98 } state = 0;
0
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99
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100 conf = ngx_http_get_module_loc_conf(r, ngx_http_bytes_filter_module);
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101
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102 if (!conf->enable || r->args.len == 0) {
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103 return ngx_http_next_header_filter(r);
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104 }
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105
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106 p = (u_char *) ngx_strnstr(r->args.data, "bytes=", r->args.len);
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107
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108 if (p == NULL) {
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109 return ngx_http_next_header_filter(r);
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110 }
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111
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112 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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113 "bytes header filter: r %p", r);
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114
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115 p += sizeof("bytes=") - 1;
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116 last = r->args.data + r->args.len;
0
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117
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118 /* create context */
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119
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120 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_bytes_ctx_t));
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121 if (ctx == NULL) {
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122 return NGX_ERROR;
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123 }
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124
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125 if (ngx_array_init(&ctx->ranges, r->pool, 1, sizeof(ngx_http_bytes_t))
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126 == NGX_ERROR)
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127 {
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128 return NGX_ERROR;
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129 }
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130
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131 /*
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132 * bytes= contain ranges compatible with RFC 2616, "14.35.1 Byte Ranges",
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133 * but no whitespaces permitted
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134 */
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135
1
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136 bad = 0;
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137
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138 while (p < last) {
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139
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140 switch (state) {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
141
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
142 case sw_start:
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
143 case sw_first_byte_pos:
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
144 if (*p == '-') {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
145 p++;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
146 suffix = 1;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
147 state = sw_last_byte_pos;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
148 break;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
149 }
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
150 suffix = 0;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
151 start = 0;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
152 state = sw_first_byte_pos_n;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
153
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
154 /* fall through */
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
155
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
156 case sw_first_byte_pos_n:
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
157 if (*p == '-') {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
158 p++;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
159 state = sw_last_byte_pos;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
160 break;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
161 }
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
162 if (*p < '0' || *p > '9') {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
163 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
164 "bytes header filter: unexpected char '%c'"
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
165 " (expected first-byte-pos)", *p);
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
166 bad = 1;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
167 break;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
168 }
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
169 start = start * 10 + *p - '0';
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
170 p++;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
171 break;
0
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
172
1
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
173 case sw_last_byte_pos:
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
174 if (*p == ',' || *p == '&' || *p == ';') {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
175 /* no last byte pos, assume end of file */
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
176 end = r->headers_out.content_length_n - 1;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
177 state = sw_done;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
178 break;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
179 }
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
180 end = 0;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
181 state = sw_last_byte_pos_n;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
182
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
183 /* fall though */
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
184
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
185 case sw_last_byte_pos_n:
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
186 if (*p == ',' || *p == '&' || *p == ';') {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
187 state = sw_done;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
188 break;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
189 }
0
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
190 if (*p < '0' || *p > '9') {
1
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
191 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
192 "bytes header filter: unexpected char '%c'"
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
193 " (expected last-byte-pos)", *p);
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
194 bad = 1;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
195 break;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
196 }
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
197 end = end * 10 + *p - '0';
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
198 p++;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
199 break;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
200
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
201 case sw_done:
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
202 range = ngx_array_push(&ctx->ranges);
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
203 if (range == NULL) {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
204 return NGX_ERROR;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
205 }
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
206
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
207 if (suffix) {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
208 start = r->headers_out.content_length_n - end;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
209 end = r->headers_out.content_length_n - 1;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
210 }
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
211
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
212 /* note: range->end isn't inclusive, while last-byte-pos is */
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
213
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
214 range->start = start;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
215 range->end = end + 1;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
216
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
217 if (*p == ',') {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
218 p++;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
219 state = sw_first_byte_pos;
0
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
220 break;
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
221 }
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
222
1
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
223 goto done;
0
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
224
1
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
225 }
0
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
226
1
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
227 if (bad) {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
228 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
229 "bytes header filter: invalid range specification");
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
230 return ngx_http_next_header_filter(r);
0
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
231 }
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
232 }
1
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
233
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
234 switch (state) {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
235
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
236 case sw_last_byte_pos:
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
237 end = r->headers_out.content_length_n - 1;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
238
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
239 /* fall through */
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
240
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
241 case sw_last_byte_pos_n:
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
242 range = ngx_array_push(&ctx->ranges);
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
243 if (range == NULL) {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
244 return NGX_ERROR;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
245 }
0
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
246
1
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
247 if (suffix) {
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
248 start = r->headers_out.content_length_n - end;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
249 end = r->headers_out.content_length_n - 1;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
250 }
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
251
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
252 range->start = start;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
253 range->end = end + 1;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
254
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
255 break;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
256
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
257 default:
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
258 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
259 "bytes header filter: invalid range specification");
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
260 return ngx_http_next_header_filter(r);
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
261
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
262 }
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
263
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
264 done:
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
265 /* ... fix content-length */
0
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
266
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
267 ngx_http_set_ctx(r, ctx, ngx_http_bytes_filter_module);
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
268
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
269 return ngx_http_next_header_filter(r);
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
270 }
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
271
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
272
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
273 static ngx_int_t
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
274 ngx_http_bytes_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
275 {
1
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
276 ngx_uint_t i;
0
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
277 ngx_http_bytes_ctx_t *ctx;
1
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
278 ngx_http_bytes_t *range;
0
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
279
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
280 ctx = ngx_http_get_module_ctx(r, ngx_http_bytes_filter_module);
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
281
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
282 if (ctx == NULL) {
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
283 return ngx_http_next_body_filter(r, in);
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
284 }
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
285
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
286 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
287 "bytes body filter: r %p, in %p", r, in);
8aec31ab4d52 Bytes filter module skeleton, currently does nothing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
288
1
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents: 0
diff changeset
289 range = ctx->ranges.elts;
6b995d5251ec Implement bytes= argument parsing.
Maxim Dounin <mdounin@mdounin.ru>
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290
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291 for (i = 0; i < ctx->ranges.nelts; i++) {
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292 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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293 "bytes body filter: %O-%O", range->start, range->end);
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294 range++;
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295 }
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296
0
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297 return ngx_http_next_body_filter(r, in);
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298 }
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299
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300
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301 static void *
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302 ngx_http_bytes_create_conf(ngx_conf_t *cf)
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303 {
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304 ngx_http_bytes_conf_t *conf;
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305
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306 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_bytes_conf_t));
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307 if (conf == NULL) {
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308 return NGX_CONF_ERROR;
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309 }
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310
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311 conf->enable = NGX_CONF_UNSET;
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312
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313 return conf;
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314 }
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315
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316
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317 static char *
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318 ngx_http_bytes_merge_conf(ngx_conf_t *cf, void *parent, void *child)
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319 {
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320 ngx_http_bytes_conf_t *prev = parent;
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321 ngx_http_bytes_conf_t *conf = child;
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322
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323 ngx_conf_merge_value(conf->enable, prev->enable, 0);
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324
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325 return NGX_CONF_OK;
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326 }
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327
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328
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329 static ngx_int_t
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330 ngx_http_bytes_init(ngx_conf_t *cf)
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331 {
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332 ngx_http_next_header_filter = ngx_http_top_header_filter;
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333 ngx_http_top_header_filter = ngx_http_bytes_header_filter;
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334
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335 ngx_http_next_body_filter = ngx_http_top_body_filter;
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336 ngx_http_top_body_filter = ngx_http_bytes_body_filter;
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337
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338 return NGX_OK;
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339 }