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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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230
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12 static ngx_int_t ngx_http_chunked_filter_init(ngx_conf_t *cf);
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50
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13
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14
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15 static ngx_http_module_t ngx_http_chunked_filter_module_ctx = {
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58
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16 NULL, /* preconfiguration */
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230
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17 ngx_http_chunked_filter_init, /* postconfiguration */
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18
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19 NULL, /* create main configuration */
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20 NULL, /* init main configuration */
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21
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22 NULL, /* create server configuration */
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23 NULL, /* merge server configuration */
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24
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25 NULL, /* create location configuration */
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178
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26 NULL /* merge location configuration */
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50
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27 };
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28
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29
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30 ngx_module_t ngx_http_chunked_filter_module = {
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58
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31 NGX_MODULE_V1,
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50
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32 &ngx_http_chunked_filter_module_ctx, /* module context */
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33 NULL, /* module directives */
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34 NGX_HTTP_MODULE, /* module type */
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90
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35 NULL, /* init master */
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230
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36 NULL, /* init module */
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90
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37 NULL, /* init process */
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38 NULL, /* init thread */
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39 NULL, /* exit thread */
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40 NULL, /* exit process */
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41 NULL, /* exit master */
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42 NGX_MODULE_V1_PADDING
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50
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43 };
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44
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45
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46 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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47 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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48
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49
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50 static ngx_int_t
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51 ngx_http_chunked_header_filter(ngx_http_request_t *r)
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52 {
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164
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53 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED
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54 || r->headers_out.status == NGX_HTTP_NO_CONTENT
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412
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55 || r != r->main
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56 || (r->method & NGX_HTTP_HEAD))
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164
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57 {
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58 return ngx_http_next_header_filter(r);
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59 }
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60
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61 if (r->headers_out.content_length_n == -1) {
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62 if (r->http_version < NGX_HTTP_VERSION_11) {
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63 r->keepalive = 0;
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64
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65 } else {
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66 r->chunked = 1;
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67 }
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68 }
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69
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70 return ngx_http_next_header_filter(r);
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71 }
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72
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73
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74 static ngx_int_t
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75 ngx_http_chunked_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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76 {
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77 u_char *chunk;
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78 off_t size;
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79 ngx_buf_t *b;
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80 ngx_chain_t out, tail, *cl, *tl, **ll;
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81
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82 if (in == NULL || !r->chunked || r->header_only) {
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83 return ngx_http_next_body_filter(r, in);
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84 }
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85
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86 out.buf = NULL;
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87 ll = &out.next;
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88
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89 size = 0;
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90 cl = in;
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91
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92 for ( ;; ) {
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93 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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94 "http chunk: %d", ngx_buf_size(cl->buf));
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95
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96 size += ngx_buf_size(cl->buf);
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97
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216
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98 if (cl->buf->flush
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99 || cl->buf->sync
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100 || ngx_buf_in_memory(cl->buf)
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101 || cl->buf->in_file)
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102 {
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50
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103 tl = ngx_alloc_chain_link(r->pool);
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104 if (tl == NULL) {
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105 return NGX_ERROR;
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106 }
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107
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108 tl->buf = cl->buf;
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109 *ll = tl;
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110 ll = &tl->next;
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111 }
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112
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113 if (cl->next == NULL) {
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114 break;
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115 }
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116
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117 cl = cl->next;
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118 }
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119
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120 if (size) {
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121 b = ngx_calloc_buf(r->pool);
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122 if (b == NULL) {
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123 return NGX_ERROR;
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124 }
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125
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126 /* the "0000000000000000" is 64-bit hexadimal string */
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127
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128 chunk = ngx_palloc(r->pool, sizeof("0000000000000000" CRLF) - 1);
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129 if (chunk == NULL) {
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130 return NGX_ERROR;
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131 }
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132
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133 b->temporary = 1;
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134 b->pos = chunk;
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135 b->last = ngx_sprintf(chunk, "%xO" CRLF, size);
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136
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137 out.buf = b;
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138 }
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139
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140 if (cl->buf->last_buf) {
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141 b = ngx_calloc_buf(r->pool);
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142 if (b == NULL) {
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143 return NGX_ERROR;
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144 }
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145
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146 b->memory = 1;
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147 b->last_buf = 1;
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148 b->pos = (u_char *) CRLF "0" CRLF CRLF;
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149 b->last = b->pos + 7;
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150
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151 cl->buf->last_buf = 0;
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152
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153 if (size == 0) {
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154 b->pos += 2;
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155 out.buf = b;
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156 out.next = NULL;
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157
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158 return ngx_http_next_body_filter(r, &out);
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159 }
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160
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161 } else {
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162 if (size == 0) {
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163 *ll = NULL;
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164 return ngx_http_next_body_filter(r, out.next);
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165 }
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166
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167 b = ngx_calloc_buf(r->pool);
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168 if (b == NULL) {
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169 return NGX_ERROR;
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170 }
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171
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172 b->memory = 1;
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173 b->pos = (u_char *) CRLF;
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174 b->last = b->pos + 2;
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175 }
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176
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177 tail.buf = b;
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178 tail.next = NULL;
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179 *ll = &tail;
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180
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181 return ngx_http_next_body_filter(r, &out);
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182 }
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183
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184
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185 static ngx_int_t
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230
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186 ngx_http_chunked_filter_init(ngx_conf_t *cf)
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50
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187 {
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188 ngx_http_next_header_filter = ngx_http_top_header_filter;
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189 ngx_http_top_header_filter = ngx_http_chunked_header_filter;
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190
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191 ngx_http_next_body_filter = ngx_http_top_body_filter;
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192 ngx_http_top_body_filter = ngx_http_chunked_body_filter;
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193
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194 return NGX_OK;
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195 }
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