Mercurial > hg > nginx
annotate src/core/ngx_output_chain.c @ 3992:a1dd9dc754ab
A new fix for the case when ssl_session_cache defined, but ssl is not
enabled in any server. The previous r1033 does not help when unused zone
becomes used after reconfiguration, so it is backed out.
The initial thought was to make SSL modules independed from SSL implementation
and to keep OpenSSL code dependance as much as in separate files.
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Thu, 04 Aug 2011 11:12:30 +0000 |
| parents | 7450029ff51e |
| children | 5db098f97e0e 4919fb357a5d |
| rev | line source |
|---|---|
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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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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_event.h> |
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10 |
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11 |
| 469 | 12 #if 0 |
| 13 #define NGX_SENDFILE_LIMIT 4096 | |
| 14 #endif | |
| 15 | |
| 2316 | 16 /* |
| 17 * When DIRECTIO is enabled FreeBSD, Solaris, and MacOSX read directly | |
| 18 * to an application memory from a device if parameters are aligned | |
| 3053 | 19 * to device sector boundary (512 bytes). They fallback to usual read |
| 2316 | 20 * operation if the parameters are not aligned. |
| 21 * Linux allows DIRECTIO only if the parameters are aligned to a filesystem | |
| 22 * sector boundary, otherwise it returns EINVAL. The sector size is | |
| 23 * usually 512 bytes, however, on XFS it may be 4096 bytes. | |
| 24 */ | |
| 469 | 25 |
| 26 #define NGX_NONE 1 | |
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27 |
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28 |
| 467 | 29 static ngx_inline ngx_int_t |
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30 ngx_output_chain_as_is(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf); |
| 469 | 31 static ngx_int_t ngx_output_chain_add_copy(ngx_pool_t *pool, |
| 499 | 32 ngx_chain_t **chain, ngx_chain_t *in); |
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33 static ngx_int_t ngx_output_chain_align_file_buf(ngx_output_chain_ctx_t *ctx, |
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34 off_t bsize); |
| 2230 | 35 static ngx_int_t ngx_output_chain_get_buf(ngx_output_chain_ctx_t *ctx, |
| 36 off_t bsize); | |
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37 static ngx_int_t ngx_output_chain_copy_buf(ngx_output_chain_ctx_t *ctx); |
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38 |
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39 |
| 499 | 40 ngx_int_t |
| 41 ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in) | |
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42 { |
| 473 | 43 off_t bsize; |
| 597 | 44 ngx_int_t rc, last; |
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45 ngx_chain_t *cl, *out, **last_out; |
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46 |
| 455 | 47 if (ctx->in == NULL && ctx->busy == NULL) { |
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48 |
| 469 | 49 /* |
| 50 * the short path for the case when the ctx->in and ctx->busy chains | |
| 51 * are empty, the incoming chain is empty too or has the single buf | |
| 52 * that does not require the copy | |
| 53 */ | |
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54 |
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55 if (in == NULL) { |
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56 return ctx->output_filter(ctx->filter_ctx, in); |
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57 } |
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58 |
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59 if (in->next == NULL |
| 469 | 60 #if (NGX_SENDFILE_LIMIT) |
| 61 && !(in->buf->in_file && in->buf->file_last > NGX_SENDFILE_LIMIT) | |
| 62 #endif | |
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63 && ngx_output_chain_as_is(ctx, in->buf)) |
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64 { |
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65 return ctx->output_filter(ctx->filter_ctx, in); |
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66 } |
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67 } |
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68 |
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69 /* add the incoming buf to the chain ctx->in */ |
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70 |
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71 if (in) { |
| 469 | 72 if (ngx_output_chain_add_copy(ctx->pool, &ctx->in, in) == NGX_ERROR) { |
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73 return NGX_ERROR; |
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74 } |
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75 } |
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76 |
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77 out = NULL; |
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78 last_out = &out; |
| 499 | 79 last = NGX_NONE; |
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80 |
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81 for ( ;; ) { |
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82 |
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83 #if (NGX_HAVE_FILE_AIO) |
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84 if (ctx->aio) { |
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85 return NGX_AGAIN; |
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86 } |
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87 #endif |
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88 |
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89 while (ctx->in) { |
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90 |
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91 /* |
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92 * cycle while there are the ctx->in bufs |
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93 * and there are the free output bufs to copy in |
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94 */ |
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95 |
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96 bsize = ngx_buf_size(ctx->in->buf); |
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97 |
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98 if (bsize == 0 && !ngx_buf_special(ctx->in->buf)) { |
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99 |
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100 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, |
| 483 | 101 "zero size buf in output " |
| 102 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
| 103 ctx->in->buf->temporary, | |
| 104 ctx->in->buf->recycled, | |
| 105 ctx->in->buf->in_file, | |
| 106 ctx->in->buf->start, | |
| 107 ctx->in->buf->pos, | |
| 108 ctx->in->buf->last, | |
| 109 ctx->in->buf->file, | |
| 110 ctx->in->buf->file_pos, | |
| 111 ctx->in->buf->file_last); | |
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112 |
| 473 | 113 ngx_debug_point(); |
| 114 | |
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115 ctx->in = ctx->in->next; |
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116 |
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117 continue; |
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118 } |
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119 |
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120 if (ngx_output_chain_as_is(ctx, ctx->in->buf)) { |
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121 |
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122 /* move the chain link to the output chain */ |
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123 |
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124 cl = ctx->in; |
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125 ctx->in = cl->next; |
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126 |
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127 *last_out = cl; |
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128 last_out = &cl->next; |
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129 cl->next = NULL; |
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130 |
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131 continue; |
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132 } |
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133 |
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134 if (ctx->buf == NULL) { |
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135 |
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136 rc = ngx_output_chain_align_file_buf(ctx, bsize); |
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137 |
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138 if (rc == NGX_ERROR) { |
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139 return NGX_ERROR; |
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140 } |
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141 |
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142 if (rc != NGX_OK) { |
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143 |
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144 if (ctx->free) { |
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145 |
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146 /* get the free buf */ |
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147 |
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148 cl = ctx->free; |
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149 ctx->buf = cl->buf; |
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150 ctx->free = cl->next; |
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151 |
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152 ngx_free_chain(ctx->pool, cl); |
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153 |
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154 } else if (out || ctx->allocated == ctx->bufs.num) { |
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155 |
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156 break; |
|
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157 |
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158 } else if (ngx_output_chain_get_buf(ctx, bsize) != NGX_OK) { |
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159 return NGX_ERROR; |
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160 } |
|
160
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161 } |
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162 } |
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163 |
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164 rc = ngx_output_chain_copy_buf(ctx); |
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165 |
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166 if (rc == NGX_ERROR) { |
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167 return rc; |
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168 } |
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169 |
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170 if (rc == NGX_AGAIN) { |
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171 if (out) { |
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172 break; |
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173 } |
|
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174 |
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175 return rc; |
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176 } |
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177 |
|
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178 /* delete the completed buf from the ctx->in chain */ |
|
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179 |
|
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180 if (ngx_buf_size(ctx->in->buf) == 0) { |
|
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181 ctx->in = ctx->in->next; |
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182 } |
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183 |
| 501 | 184 cl = ngx_alloc_chain_link(ctx->pool); |
| 185 if (cl == NULL) { | |
| 461 | 186 return NGX_ERROR; |
| 187 } | |
| 501 | 188 |
| 461 | 189 cl->buf = ctx->buf; |
| 190 cl->next = NULL; | |
|
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191 *last_out = cl; |
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192 last_out = &cl->next; |
|
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193 ctx->buf = NULL; |
|
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194 } |
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195 |
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196 if (out == NULL && last != NGX_NONE) { |
| 509 | 197 |
| 198 if (ctx->in) { | |
| 199 return NGX_AGAIN; | |
| 200 } | |
| 201 | |
|
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202 return last; |
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203 } |
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204 |
|
294
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205 last = ctx->output_filter(ctx->filter_ctx, out); |
|
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206 |
| 569 | 207 if (last == NGX_ERROR || last == NGX_DONE) { |
| 208 return last; | |
| 209 } | |
| 210 | |
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211 ngx_chain_update_chains(&ctx->free, &ctx->busy, &out, ctx->tag); |
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212 last_out = &out; |
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213 } |
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214 } |
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215 |
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216 |
| 467 | 217 static ngx_inline ngx_int_t |
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218 ngx_output_chain_as_is(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf) |
|
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219 { |
| 469 | 220 ngx_uint_t sendfile; |
| 221 | |
|
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222 if (ngx_buf_special(buf)) { |
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223 return 1; |
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224 } |
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225 |
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226 if (buf->in_file && buf->file->directio) { |
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227 return 0; |
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228 } |
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229 |
| 469 | 230 sendfile = ctx->sendfile; |
| 231 | |
| 232 #if (NGX_SENDFILE_LIMIT) | |
| 233 | |
| 234 if (buf->in_file && buf->file_pos >= NGX_SENDFILE_LIMIT) { | |
| 235 sendfile = 0; | |
| 236 } | |
| 237 | |
| 238 #endif | |
| 239 | |
| 240 if (!sendfile) { | |
| 455 | 241 |
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242 if (!ngx_buf_in_memory(buf)) { |
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243 return 0; |
|
170
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244 } |
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245 |
|
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246 buf->in_file = 0; |
|
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247 } |
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248 |
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249 if (ctx->need_in_memory && !ngx_buf_in_memory(buf)) { |
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250 return 0; |
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251 } |
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252 |
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253 if (ctx->need_in_temp && (buf->memory || buf->mmap)) { |
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254 return 0; |
|
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255 } |
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256 |
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257 return 1; |
|
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258 } |
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259 |
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260 |
| 499 | 261 static ngx_int_t |
| 262 ngx_output_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, | |
| 263 ngx_chain_t *in) | |
| 469 | 264 { |
| 265 ngx_chain_t *cl, **ll; | |
| 266 #if (NGX_SENDFILE_LIMIT) | |
| 267 ngx_buf_t *b, *buf; | |
| 268 #endif | |
| 269 | |
| 270 ll = chain; | |
| 271 | |
| 272 for (cl = *chain; cl; cl = cl->next) { | |
| 273 ll = &cl->next; | |
| 274 } | |
| 275 | |
| 276 while (in) { | |
| 277 | |
| 501 | 278 cl = ngx_alloc_chain_link(pool); |
| 279 if (cl == NULL) { | |
| 469 | 280 return NGX_ERROR; |
| 281 } | |
| 282 | |
| 283 #if (NGX_SENDFILE_LIMIT) | |
| 284 | |
| 285 buf = in->buf; | |
| 286 | |
| 287 if (buf->in_file | |
| 288 && buf->file_pos < NGX_SENDFILE_LIMIT | |
| 289 && buf->file_last > NGX_SENDFILE_LIMIT) | |
| 290 { | |
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291 /* split a file buf on two bufs by the sendfile limit */ |
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292 |
| 501 | 293 b = ngx_calloc_buf(pool); |
| 294 if (b == NULL) { | |
| 469 | 295 return NGX_ERROR; |
| 296 } | |
| 297 | |
| 298 ngx_memcpy(b, buf, sizeof(ngx_buf_t)); | |
| 299 | |
| 300 if (ngx_buf_in_memory(buf)) { | |
| 301 buf->pos += (ssize_t) (NGX_SENDFILE_LIMIT - buf->file_pos); | |
| 302 b->last = buf->pos; | |
| 303 } | |
| 304 | |
| 305 buf->file_pos = NGX_SENDFILE_LIMIT; | |
| 306 b->file_last = NGX_SENDFILE_LIMIT; | |
| 307 | |
| 308 cl->buf = b; | |
| 309 | |
| 310 } else { | |
| 311 cl->buf = buf; | |
| 312 in = in->next; | |
| 313 } | |
| 314 | |
| 315 #else | |
| 316 cl->buf = in->buf; | |
| 317 in = in->next; | |
| 318 | |
| 319 #endif | |
| 320 | |
|
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321 cl->next = NULL; |
| 469 | 322 *ll = cl; |
| 323 ll = &cl->next; | |
| 324 } | |
| 325 | |
| 326 return NGX_OK; | |
| 327 } | |
| 328 | |
| 329 | |
| 499 | 330 static ngx_int_t |
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331 ngx_output_chain_align_file_buf(ngx_output_chain_ctx_t *ctx, off_t bsize) |
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332 { |
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333 size_t size; |
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334 ngx_buf_t *in; |
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335 |
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336 in = ctx->in->buf; |
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337 |
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338 if (in->file == NULL || !in->file->directio) { |
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339 return NGX_DECLINED; |
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340 } |
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341 |
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342 ctx->directio = 1; |
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343 |
| 3053 | 344 size = (size_t) (in->file_pos - (in->file_pos & ~(ctx->alignment - 1))); |
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345 |
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346 if (size == 0) { |
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347 |
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348 if (bsize >= (off_t) ctx->bufs.size) { |
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349 return NGX_DECLINED; |
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350 } |
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351 |
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352 size = (size_t) bsize; |
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353 |
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354 } else { |
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355 size = (size_t) ctx->alignment - size; |
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356 |
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357 if ((off_t) size > bsize) { |
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358 size = (size_t) bsize; |
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359 } |
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360 } |
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361 |
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362 ctx->buf = ngx_create_temp_buf(ctx->pool, size); |
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363 if (ctx->buf == NULL) { |
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364 return NGX_ERROR; |
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365 } |
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366 |
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367 /* |
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368 * we do not set ctx->buf->tag, because we do not want |
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369 * to reuse the buf via ctx->free list |
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370 */ |
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371 |
|
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372 #if (NGX_HAVE_ALIGNED_DIRECTIO) |
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373 ctx->unaligned = 1; |
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374 #endif |
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375 |
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376 return NGX_OK; |
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377 } |
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378 |
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379 |
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380 static ngx_int_t |
| 2230 | 381 ngx_output_chain_get_buf(ngx_output_chain_ctx_t *ctx, off_t bsize) |
| 382 { | |
| 383 size_t size; | |
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384 ngx_buf_t *b, *in; |
| 2230 | 385 ngx_uint_t recycled; |
| 386 | |
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387 in = ctx->in->buf; |
| 2230 | 388 size = ctx->bufs.size; |
| 389 recycled = 1; | |
| 390 | |
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391 if (in->last_in_chain) { |
| 2230 | 392 |
| 393 if (bsize < (off_t) size) { | |
| 394 | |
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395 /* |
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396 * allocate a small temp buf for a small last buf |
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397 * or its small last part |
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398 */ |
| 2230 | 399 |
| 400 size = (size_t) bsize; | |
| 401 recycled = 0; | |
| 402 | |
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403 } else if (!ctx->directio |
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404 && ctx->bufs.num == 1 |
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405 && (bsize < (off_t) (size + size / 4))) |
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406 { |
| 2230 | 407 /* |
|
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408 * allocate a temp buf that equals to a last buf, |
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409 * if there is no directio, the last buf size is lesser |
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410 * than 1.25 of bufs.size and the temp buf is single |
| 2230 | 411 */ |
| 412 | |
| 413 size = (size_t) bsize; | |
| 414 recycled = 0; | |
| 415 } | |
| 416 } | |
| 417 | |
| 418 b = ngx_calloc_buf(ctx->pool); | |
| 419 if (b == NULL) { | |
| 420 return NGX_ERROR; | |
| 421 } | |
| 422 | |
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423 if (ctx->directio) { |
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424 |
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425 /* |
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426 * allocate block aligned to a disk sector size to enable |
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427 * userland buffer direct usage conjunctly with directio |
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428 */ |
| 2230 | 429 |
|
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430 b->start = ngx_pmemalign(ctx->pool, size, (size_t) ctx->alignment); |
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431 if (b->start == NULL) { |
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432 return NGX_ERROR; |
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433 } |
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434 |
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435 } else { |
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436 b->start = ngx_palloc(ctx->pool, size); |
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437 if (b->start == NULL) { |
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438 return NGX_ERROR; |
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439 } |
| 2230 | 440 } |
| 441 | |
| 442 b->pos = b->start; | |
| 443 b->last = b->start; | |
| 444 b->end = b->last + size; | |
| 445 b->temporary = 1; | |
| 446 b->tag = ctx->tag; | |
| 447 b->recycled = recycled; | |
| 448 | |
| 449 ctx->buf = b; | |
| 450 ctx->allocated++; | |
| 451 | |
| 452 return NGX_OK; | |
| 453 } | |
| 454 | |
| 455 | |
| 456 static ngx_int_t | |
|
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457 ngx_output_chain_copy_buf(ngx_output_chain_ctx_t *ctx) |
|
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458 { |
|
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459 off_t size; |
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460 ssize_t n; |
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461 ngx_buf_t *src, *dst; |
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462 ngx_uint_t sendfile; |
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463 |
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464 src = ctx->in->buf; |
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465 dst = ctx->buf; |
|
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466 |
|
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467 size = ngx_buf_size(src); |
| 3515 | 468 size = ngx_min(size, dst->end - dst->pos); |
|
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469 |
|
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470 sendfile = ctx->sendfile & !ctx->directio; |
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471 |
| 469 | 472 #if (NGX_SENDFILE_LIMIT) |
| 473 | |
| 474 if (src->in_file && src->file_pos >= NGX_SENDFILE_LIMIT) { | |
| 475 sendfile = 0; | |
| 476 } | |
| 477 | |
| 478 #endif | |
| 479 | |
|
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480 if (ngx_buf_in_memory(src)) { |
| 473 | 481 ngx_memcpy(dst->pos, src->pos, (size_t) size); |
| 482 src->pos += (size_t) size; | |
| 483 dst->last += (size_t) size; | |
|
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484 |
| 455 | 485 if (src->in_file) { |
| 486 | |
| 487 if (sendfile) { | |
| 488 dst->in_file = 1; | |
| 489 dst->file = src->file; | |
| 490 dst->file_pos = src->file_pos; | |
| 491 dst->file_last = src->file_pos + size; | |
| 492 | |
| 493 } else { | |
| 494 dst->in_file = 0; | |
| 495 } | |
| 496 | |
|
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497 src->file_pos += size; |
| 452 | 498 |
| 499 } else { | |
| 500 dst->in_file = 0; | |
|
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501 } |
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502 |
|
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503 if (src->pos == src->last) { |
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504 dst->flush = src->flush; |
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505 dst->last_buf = src->last_buf; |
|
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506 dst->last_in_chain = src->last_in_chain; |
|
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parents:
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|
507 } |
|
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parents:
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|
508 |
|
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parents:
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|
509 } else { |
|
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510 |
|
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|
511 #if (NGX_HAVE_ALIGNED_DIRECTIO) |
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512 |
|
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|
513 if (ctx->unaligned) { |
|
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514 if (ngx_directio_off(src->file->fd) == NGX_FILE_ERROR) { |
|
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515 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, ngx_errno, |
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516 ngx_directio_off_n " \"%s\" failed", |
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517 src->file->name.data); |
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518 } |
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519 } |
|
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520 |
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521 #endif |
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522 |
|
3052
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|
523 #if (NGX_HAVE_FILE_AIO) |
|
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|
524 |
|
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|
525 if (ctx->aio_handler) { |
|
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|
526 n = ngx_file_aio_read(src->file, dst->pos, (size_t) size, |
|
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527 src->file_pos, ctx->pool); |
|
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|
528 if (n == NGX_AGAIN) { |
|
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|
529 ctx->aio_handler(ctx, src->file); |
|
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|
530 return NGX_AGAIN; |
|
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|
531 } |
|
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|
532 |
|
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|
533 } else { |
|
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|
534 n = ngx_read_file(src->file, dst->pos, (size_t) size, |
|
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|
535 src->file_pos); |
|
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|
536 } |
|
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|
537 #else |
|
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538 |
| 473 | 539 n = ngx_read_file(src->file, dst->pos, (size_t) size, src->file_pos); |
|
160
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|
540 |
|
3052
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|
541 #endif |
|
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changeset
|
542 |
|
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543 #if (NGX_HAVE_ALIGNED_DIRECTIO) |
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|
544 |
|
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|
545 if (ctx->unaligned) { |
|
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|
546 ngx_err_t err; |
|
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547 |
|
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|
548 err = ngx_errno; |
|
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549 |
|
3164
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|
550 if (ngx_directio_on(src->file->fd) == NGX_FILE_ERROR) { |
|
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|
551 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, ngx_errno, |
|
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552 ngx_directio_on_n " \"%s\" failed", |
|
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553 src->file->name.data); |
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|
554 } |
|
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|
555 |
|
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|
556 ngx_set_errno(err); |
|
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|
557 |
|
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|
558 ctx->unaligned = 0; |
|
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559 } |
|
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|
560 |
|
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561 #endif |
|
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562 |
|
160
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|
563 if (n == NGX_ERROR) { |
| 517 | 564 return (ngx_int_t) n; |
|
160
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|
565 } |
|
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parents:
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|
566 |
| 473 | 567 if (n != size) { |
|
2231
8564129d49b6
*) handle unaligned file part for directio
Igor Sysoev <igor@sysoev.ru>
parents:
2230
diff
changeset
|
568 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, |
|
2245
8a98616abb73
add filename to the log message
Igor Sysoev <igor@sysoev.ru>
parents:
2240
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|
569 ngx_read_file_n " read only %z of %O from \"%s\"", |
|
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|
570 n, size, src->file->name.data); |
|
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|
571 return NGX_ERROR; |
|
160
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|
572 } |
|
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parents:
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|
573 |
|
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parents:
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|
574 dst->last += n; |
|
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|
575 |
| 452 | 576 if (sendfile) { |
| 577 dst->in_file = 1; | |
| 578 dst->file = src->file; | |
| 579 dst->file_pos = src->file_pos; | |
| 455 | 580 dst->file_last = src->file_pos + n; |
| 452 | 581 |
| 582 } else { | |
|
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diff
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|
583 dst->in_file = 0; |
|
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|
584 } |
|
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|
585 |
| 455 | 586 src->file_pos += n; |
| 587 | |
| 1238 | 588 if (src->file_pos == src->file_last) { |
|
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diff
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|
589 dst->flush = src->flush; |
|
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|
590 dst->last_buf = src->last_buf; |
|
2899
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diff
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|
591 dst->last_in_chain = src->last_in_chain; |
|
160
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parents:
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|
592 } |
|
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parents:
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|
593 } |
|
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parents:
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changeset
|
594 |
|
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parents:
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|
595 return NGX_OK; |
|
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parents:
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|
596 } |
|
162
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parents:
160
diff
changeset
|
597 |
|
96993d4d5067
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|
598 |
| 499 | 599 ngx_int_t |
| 600 ngx_chain_writer(void *data, ngx_chain_t *in) | |
|
162
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|
601 { |
|
166
389d7ee9fa60
nginx-0.0.1-2003-10-30-11:51:06 import
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parents:
164
diff
changeset
|
602 ngx_chain_writer_ctx_t *ctx = data; |
|
162
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|
603 |
| 1962 | 604 off_t size; |
| 605 ngx_chain_t *cl; | |
| 606 ngx_connection_t *c; | |
| 607 | |
| 608 c = ctx->connection; | |
|
162
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|
609 |
| 473 | 610 for (size = 0; in; in = in->next) { |
| 611 | |
| 612 #if 1 | |
| 613 if (ngx_buf_size(in->buf) == 0 && !ngx_buf_special(in->buf)) { | |
| 614 ngx_debug_point(); | |
| 615 } | |
| 616 #endif | |
| 617 | |
| 618 size += ngx_buf_size(in->buf); | |
|
408
d6e2b445c1b8
nginx-0.0.10-2004-08-27-19:40:59 import
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parents:
403
diff
changeset
|
619 |
| 1962 | 620 ngx_log_debug2(NGX_LOG_DEBUG_CORE, c->log, 0, |
| 1226 | 621 "chain writer buf fl:%d s:%uO", |
| 622 in->buf->flush, ngx_buf_size(in->buf)); | |
|
408
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nginx-0.0.10-2004-08-27-19:40:59 import
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parents:
403
diff
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|
623 |
| 501 | 624 cl = ngx_alloc_chain_link(ctx->pool); |
| 625 if (cl == NULL) { | |
| 461 | 626 return NGX_ERROR; |
| 627 } | |
| 501 | 628 |
| 461 | 629 cl->buf = in->buf; |
| 630 cl->next = NULL; | |
|
162
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|
631 *ctx->last = cl; |
|
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diff
changeset
|
632 ctx->last = &cl->next; |
|
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diff
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|
633 } |
|
96993d4d5067
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parents:
160
diff
changeset
|
634 |
| 1962 | 635 ngx_log_debug1(NGX_LOG_DEBUG_CORE, c->log, 0, |
| 461 | 636 "chain writer in: %p", ctx->out); |
|
291
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257
diff
changeset
|
637 |
| 473 | 638 for (cl = ctx->out; cl; cl = cl->next) { |
| 639 | |
| 640 #if 1 | |
| 641 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
| 642 ngx_debug_point(); | |
| 643 } | |
| 644 | |
| 645 #endif | |
| 646 | |
| 647 size += ngx_buf_size(cl->buf); | |
| 648 } | |
| 649 | |
| 1962 | 650 if (size == 0 && !c->buffered) { |
| 473 | 651 return NGX_OK; |
| 652 } | |
| 653 | |
| 1962 | 654 ctx->out = c->send_chain(c, ctx->out, ctx->limit); |
|
162
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diff
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|
655 |
| 1962 | 656 ngx_log_debug1(NGX_LOG_DEBUG_CORE, c->log, 0, |
| 461 | 657 "chain writer out: %p", ctx->out); |
|
291
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diff
changeset
|
658 |
|
162
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diff
changeset
|
659 if (ctx->out == NGX_CHAIN_ERROR) { |
|
96993d4d5067
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160
diff
changeset
|
660 return NGX_ERROR; |
|
96993d4d5067
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parents:
160
diff
changeset
|
661 } |
|
96993d4d5067
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Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
662 |
|
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
663 if (ctx->out == NULL) { |
|
96993d4d5067
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diff
changeset
|
664 ctx->last = &ctx->out; |
| 1211 | 665 |
| 1962 | 666 if (!c->buffered) { |
|
1215
fb3ff245c96b
an request body might not be passed to backend,
Igor Sysoev <igor@sysoev.ru>
parents:
1211
diff
changeset
|
667 return NGX_OK; |
|
fb3ff245c96b
an request body might not be passed to backend,
Igor Sysoev <igor@sysoev.ru>
parents:
1211
diff
changeset
|
668 } |
|
162
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
669 } |
|
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
670 |
|
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
671 return NGX_AGAIN; |
|
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
672 } |