Mercurial > hg > nginx
annotate src/http/ngx_http_request_body.c @ 841:790ed4eb762e
fix big client body receiving with deferred accept()
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Mon, 13 Nov 2006 20:40:17 +0000 |
| parents | 86862ad988da |
| children | bb139aba3199 |
| 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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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 #include <ngx_http.h> |
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12 |
| 509 | 13 static void ngx_http_read_client_request_body_handler(ngx_http_request_t *r); |
| 14 static ngx_int_t ngx_http_do_read_client_request_body(ngx_http_request_t *r); | |
| 633 | 15 static ngx_int_t ngx_http_write_request_body(ngx_http_request_t *r, |
| 16 ngx_chain_t *body); | |
| 17 static void ngx_http_finalize_request_body(ngx_http_request_t *r, ngx_int_t rc); | |
| 18 static void ngx_http_read_discarded_body_handler(ngx_http_request_t *r); | |
| 19 static ngx_int_t ngx_http_read_discarded_body(ngx_http_request_t *r); | |
| 20 | |
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21 |
| 479 | 22 /* |
| 23 * on completion ngx_http_read_client_request_body() adds to | |
| 24 * r->request_body->bufs one or two bufs: | |
| 25 * *) one memory buf that was preread in r->header_in; | |
| 26 * *) one memory or file buf that contains the rest of the body | |
| 27 */ | |
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28 |
| 501 | 29 ngx_int_t |
| 30 ngx_http_read_client_request_body(ngx_http_request_t *r, | |
| 31 ngx_http_client_body_handler_pt post_handler) | |
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32 { |
| 663 | 33 size_t preread; |
| 34 ssize_t size; | |
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35 ngx_buf_t *b; |
| 633 | 36 ngx_chain_t *cl, **next; |
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37 ngx_temp_file_t *tf; |
| 479 | 38 ngx_http_request_body_t *rb; |
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39 ngx_http_core_loc_conf_t *clcf; |
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40 |
| 537 | 41 if (r->request_body || r->discard_body) { |
| 509 | 42 post_handler(r); |
| 43 return NGX_OK; | |
| 44 } | |
| 45 | |
| 501 | 46 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t)); |
| 47 if (rb == NULL) { | |
| 479 | 48 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 49 } | |
| 50 | |
| 51 r->request_body = rb; | |
| 52 | |
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53 if (r->headers_in.content_length_n < 0) { |
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54 post_handler(r); |
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55 return NGX_OK; |
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56 } |
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57 |
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58 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
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59 |
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60 if (r->headers_in.content_length_n == 0) { |
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61 |
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62 if (r->request_body_in_file_only) { |
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63 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t)); |
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64 if (tf == NULL) { |
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65 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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66 } |
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67 |
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68 tf->file.fd = NGX_INVALID_FILE; |
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69 tf->file.log = r->connection->log; |
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70 tf->path = clcf->client_body_temp_path; |
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71 tf->pool = r->pool; |
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72 tf->warn = "a client request body is buffered to a temporary file"; |
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73 tf->log_level = r->request_body_file_log_level; |
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74 tf->persistent = r->request_body_in_persistent_file; |
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75 |
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76 if (r->request_body_file_group_access) { |
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77 tf->mode = 0660; |
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78 } |
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79 |
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80 rb->temp_file = tf; |
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81 |
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82 if (ngx_create_temp_file(&tf->file, tf->path, tf->pool, |
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83 tf->persistent, tf->mode) |
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84 != NGX_OK) |
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85 { |
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86 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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87 } |
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88 } |
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89 |
| 479 | 90 post_handler(r); |
| 91 return NGX_OK; | |
| 92 } | |
| 93 | |
| 94 rb->post_handler = post_handler; | |
| 95 | |
| 96 /* | |
| 97 * set by ngx_pcalloc(): | |
| 98 * | |
| 99 * rb->bufs = NULL; | |
| 100 * rb->buf = NULL; | |
| 101 * rb->rest = 0; | |
| 102 */ | |
| 103 | |
| 633 | 104 preread = r->header_in->last - r->header_in->pos; |
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105 |
| 633 | 106 if (preread) { |
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107 |
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108 /* there is the pre-read part of the request body */ |
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109 |
| 633 | 110 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| 111 "http client request body preread %uz", preread); | |
| 112 | |
| 501 | 113 b = ngx_calloc_buf(r->pool); |
| 114 if (b == NULL) { | |
| 479 | 115 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 116 } | |
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117 |
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118 b->temporary = 1; |
| 633 | 119 b->start = r->header_in->pos; |
| 120 b->pos = r->header_in->pos; | |
| 121 b->last = r->header_in->last; | |
| 122 b->end = r->header_in->end; | |
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123 |
| 501 | 124 rb->bufs = ngx_alloc_chain_link(r->pool); |
| 125 if (rb->bufs == NULL) { | |
| 479 | 126 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 127 } | |
| 128 | |
| 129 rb->bufs->buf = b; | |
| 130 rb->bufs->next = NULL; | |
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131 |
| 667 | 132 rb->buf = b; |
| 133 | |
| 665 | 134 if ((off_t) preread >= r->headers_in.content_length_n) { |
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135 |
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136 /* the whole request body was pre-read */ |
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137 |
| 663 | 138 r->header_in->pos += (size_t) r->headers_in.content_length_n; |
| 475 | 139 r->request_length += r->headers_in.content_length_n; |
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140 |
| 633 | 141 if (r->request_body_in_file_only) { |
| 142 if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) { | |
| 143 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 144 } | |
| 145 } | |
| 146 | |
| 479 | 147 post_handler(r); |
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148 |
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149 return NGX_OK; |
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150 } |
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151 |
| 633 | 152 /* |
| 153 * to not consider the body as pipelined request in | |
| 154 * ngx_http_set_keepalive() | |
| 155 */ | |
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156 r->header_in->pos = r->header_in->last; |
| 633 | 157 |
| 158 r->request_length += preread; | |
| 159 | |
| 160 rb->rest = r->headers_in.content_length_n - preread; | |
| 161 | |
| 665 | 162 if (rb->rest <= (off_t) (b->end - b->last)) { |
| 633 | 163 |
| 164 /* the whole request body may be placed in r->header_in */ | |
| 165 | |
| 166 r->read_event_handler = ngx_http_read_client_request_body_handler; | |
| 167 | |
| 168 return ngx_http_do_read_client_request_body(r); | |
| 169 } | |
| 170 | |
| 171 next = &rb->bufs->next; | |
| 172 | |
| 173 } else { | |
| 174 b = NULL; | |
| 175 rb->rest = r->headers_in.content_length_n; | |
| 176 next = &rb->bufs; | |
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177 } |
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178 |
| 633 | 179 size = clcf->client_body_buffer_size; |
| 180 size += size >> 2; | |
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181 |
| 663 | 182 if (rb->rest < size) { |
| 183 size = (ssize_t) rb->rest; | |
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184 |
| 633 | 185 if (r->request_body_in_single_buf) { |
| 186 size += preread; | |
| 187 } | |
| 188 | |
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189 } else { |
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190 size = clcf->client_body_buffer_size; |
| 633 | 191 |
| 192 /* disable copying buffer for r->request_body_in_single_buf */ | |
| 193 b = NULL; | |
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194 } |
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195 |
| 501 | 196 rb->buf = ngx_create_temp_buf(r->pool, size); |
| 197 if (rb->buf == NULL) { | |
| 479 | 198 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 199 } | |
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200 |
| 501 | 201 cl = ngx_alloc_chain_link(r->pool); |
| 202 if (cl == NULL) { | |
| 479 | 203 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 204 } | |
|
160
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205 |
| 479 | 206 cl->buf = rb->buf; |
| 207 cl->next = NULL; | |
| 208 | |
| 633 | 209 if (b && r->request_body_in_single_buf) { |
| 210 size = b->last - b->pos; | |
| 211 ngx_memcpy(rb->buf->pos, b->pos, size); | |
| 212 rb->buf->last += size; | |
| 213 | |
| 214 next = &rb->bufs; | |
| 215 } | |
| 216 | |
| 217 *next = cl; | |
| 218 | |
| 219 if (r->request_body_in_file_only || r->request_body_in_single_buf) { | |
| 220 rb->to_write = rb->bufs; | |
|
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221 |
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222 } else { |
| 633 | 223 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs; |
|
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224 } |
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225 |
| 509 | 226 r->read_event_handler = ngx_http_read_client_request_body_handler; |
|
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227 |
| 509 | 228 return ngx_http_do_read_client_request_body(r); |
|
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229 } |
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230 |
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231 |
| 501 | 232 static void |
| 509 | 233 ngx_http_read_client_request_body_handler(ngx_http_request_t *r) |
|
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234 { |
| 509 | 235 ngx_int_t rc; |
|
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236 |
| 509 | 237 if (r->connection->read->timedout) { |
| 577 | 238 r->connection->timedout = 1; |
| 633 | 239 ngx_http_finalize_request_body(r, NGX_HTTP_REQUEST_TIME_OUT); |
|
299
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240 return; |
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241 } |
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242 |
| 509 | 243 rc = ngx_http_do_read_client_request_body(r); |
|
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244 |
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245 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { |
| 633 | 246 ngx_http_finalize_request_body(r, rc); |
|
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247 } |
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248 } |
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249 |
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250 |
| 501 | 251 static ngx_int_t |
| 509 | 252 ngx_http_do_read_client_request_body(ngx_http_request_t *r) |
|
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253 { |
|
290
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254 size_t size; |
|
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255 ssize_t n; |
|
343
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256 ngx_buf_t *b; |
| 509 | 257 ngx_connection_t *c; |
| 479 | 258 ngx_http_request_body_t *rb; |
|
162
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259 ngx_http_core_loc_conf_t *clcf; |
|
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260 |
| 509 | 261 c = r->connection; |
| 479 | 262 rb = r->request_body; |
|
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263 |
|
292
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264 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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265 "http read client request body"); |
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266 |
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267 for ( ;; ) { |
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268 for ( ;; ) { |
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269 if (rb->buf->last == rb->buf->end) { |
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270 |
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271 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) { |
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272 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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273 } |
| 479 | 274 |
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275 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs; |
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276 rb->buf->last = rb->buf->start; |
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277 } |
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278 |
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279 size = rb->buf->end - rb->buf->last; |
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280 |
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281 if ((off_t) size > rb->rest) { |
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282 size = (size_t) rb->rest; |
|
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283 } |
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284 |
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285 n = c->recv(c, rb->buf->last, size); |
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286 |
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287 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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288 "http client request body recv %z", n); |
|
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289 |
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290 if (n == NGX_AGAIN) { |
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291 break; |
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292 } |
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293 |
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294 if (n == 0) { |
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295 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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296 "client closed prematurely connection"); |
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297 } |
|
292
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298 |
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299 if (n == 0 || n == NGX_ERROR) { |
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300 c->error = 1; |
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301 return NGX_HTTP_BAD_REQUEST; |
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302 } |
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303 |
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304 rb->buf->last += n; |
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305 rb->rest -= n; |
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306 r->request_length += n; |
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307 |
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308 if (rb->rest == 0) { |
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309 break; |
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310 } |
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311 |
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312 if (rb->buf->last < rb->buf->end) { |
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313 break; |
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314 } |
|
292
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315 } |
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316 |
|
293
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317 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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318 "http client request body rest %uz", rb->rest); |
|
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319 |
| 479 | 320 if (rb->rest == 0) { |
|
294
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321 break; |
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322 } |
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323 |
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324 if (!c->read->ready) { |
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325 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
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326 ngx_add_timer(c->read, clcf->client_body_timeout); |
|
293
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327 |
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328 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) { |
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329 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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330 } |
| 573 | 331 |
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332 return NGX_AGAIN; |
| 573 | 333 } |
|
82
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334 } |
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335 |
| 573 | 336 if (c->read->timer_set) { |
| 337 ngx_del_timer(c->read); | |
| 338 } | |
| 339 | |
| 633 | 340 if (rb->temp_file || r->request_body_in_file_only) { |
|
82
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341 |
|
160
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342 /* save the last part */ |
| 479 | 343 |
| 633 | 344 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) { |
|
293
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345 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
|
162
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346 } |
|
160
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347 |
| 501 | 348 b = ngx_calloc_buf(r->pool); |
| 349 if (b == NULL) { | |
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350 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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351 } |
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352 |
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353 b->in_file = 1; |
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354 b->file_pos = 0; |
| 479 | 355 b->file_last = rb->temp_file->file.offset; |
| 356 b->file = &rb->temp_file->file; | |
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357 |
| 479 | 358 if (rb->bufs->next) { |
| 359 rb->bufs->next->buf = b; | |
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360 |
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361 } else { |
| 479 | 362 rb->bufs->buf = b; |
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363 } |
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364 } |
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365 |
| 633 | 366 if (r->request_body_in_file_only && rb->bufs->next) { |
| 367 rb->bufs = rb->bufs->next; | |
| 368 } | |
| 369 | |
| 479 | 370 rb->post_handler(r); |
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371 |
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372 return NGX_OK; |
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373 } |
| 633 | 374 |
| 375 | |
| 376 static ngx_int_t | |
| 377 ngx_http_write_request_body(ngx_http_request_t *r, ngx_chain_t *body) | |
| 378 { | |
| 379 ssize_t n; | |
| 380 ngx_temp_file_t *tf; | |
| 381 ngx_http_request_body_t *rb; | |
| 382 ngx_http_core_loc_conf_t *clcf; | |
| 383 | |
| 384 rb = r->request_body; | |
| 385 | |
| 386 if (rb->temp_file == NULL) { | |
| 387 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t)); | |
| 388 if (tf == NULL) { | |
| 389 return NGX_ERROR; | |
| 390 } | |
| 391 | |
| 392 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); | |
| 393 | |
| 394 tf->file.fd = NGX_INVALID_FILE; | |
| 395 tf->file.log = r->connection->log; | |
| 396 tf->path = clcf->client_body_temp_path; | |
| 397 tf->pool = r->pool; | |
| 398 tf->warn = "a client request body is buffered to a temporary file"; | |
| 637 | 399 tf->log_level = r->request_body_file_log_level; |
| 633 | 400 tf->persistent = r->request_body_in_persistent_file; |
| 401 | |
| 402 if (r->request_body_file_group_access) { | |
| 403 tf->mode = 0660; | |
| 404 } | |
| 405 | |
| 406 rb->temp_file = tf; | |
| 407 } | |
| 408 | |
| 409 n = ngx_write_chain_to_temp_file(rb->temp_file, body); | |
| 410 | |
| 411 /* TODO: n == 0 or not complete and level event */ | |
| 412 | |
| 413 if (n == NGX_ERROR) { | |
| 414 return NGX_ERROR; | |
| 415 } | |
| 416 | |
| 417 rb->temp_file->offset += n; | |
| 418 | |
| 419 return NGX_OK; | |
| 420 } | |
| 421 | |
| 422 | |
| 423 static void | |
| 424 ngx_http_finalize_request_body(ngx_http_request_t *r, ngx_int_t rc) | |
| 425 { | |
| 426 if (r->request_body->temp_file | |
| 427 && r->request_body_in_persistent_file | |
| 428 && r->request_body_delete_incomplete_file) | |
| 429 { | |
| 430 if (ngx_delete_file(r->request_body->temp_file->file.name.data) | |
| 431 == NGX_FILE_ERROR) | |
| 432 { | |
| 433 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno, | |
| 434 ngx_delete_file_n " \"%s\" failed", | |
| 435 r->request_body->temp_file->file.name.data); | |
| 436 } | |
| 437 } | |
| 438 | |
| 439 ngx_http_finalize_request(r, rc); | |
| 440 } | |
| 441 | |
| 442 | |
| 443 ngx_int_t | |
| 444 ngx_http_discard_body(ngx_http_request_t *r) | |
| 445 { | |
| 446 ssize_t size; | |
| 447 ngx_event_t *rev; | |
| 448 | |
| 673 | 449 if (r != r->main || r->discard_body) { |
| 633 | 450 return NGX_OK; |
| 451 } | |
| 452 | |
| 453 rev = r->connection->read; | |
| 454 | |
| 455 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body"); | |
| 456 | |
| 457 if (rev->timer_set) { | |
| 458 ngx_del_timer(rev); | |
| 459 } | |
| 460 | |
| 681 | 461 r->discard_body = 1; |
| 462 | |
| 633 | 463 if (r->headers_in.content_length_n <= 0) { |
| 464 return NGX_OK; | |
| 465 } | |
| 466 | |
| 467 size = r->header_in->last - r->header_in->pos; | |
| 468 | |
| 469 if (size) { | |
| 470 if (r->headers_in.content_length_n > size) { | |
| 471 r->headers_in.content_length_n -= size; | |
| 472 | |
| 473 } else { | |
| 663 | 474 r->header_in->pos += (size_t) r->headers_in.content_length_n; |
| 633 | 475 r->headers_in.content_length_n = 0; |
| 476 return NGX_OK; | |
| 477 } | |
| 478 } | |
| 479 | |
| 480 r->read_event_handler = ngx_http_read_discarded_body_handler; | |
| 481 | |
| 482 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { | |
| 483 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 484 } | |
| 485 | |
| 486 return ngx_http_read_discarded_body(r); | |
| 487 } | |
| 488 | |
| 489 | |
| 490 static void | |
| 491 ngx_http_read_discarded_body_handler(ngx_http_request_t *r) | |
| 492 { | |
| 493 ngx_int_t rc; | |
| 494 | |
| 495 rc = ngx_http_read_discarded_body(r); | |
| 496 | |
| 497 if (rc == NGX_AGAIN) { | |
| 498 if (ngx_handle_read_event(r->connection->read, 0) == NGX_ERROR) { | |
| 499 ngx_http_finalize_request(r, rc); | |
| 500 return; | |
| 501 } | |
| 502 } | |
| 503 | |
| 504 if (rc != NGX_OK) { | |
| 505 ngx_http_finalize_request(r, rc); | |
| 506 } | |
| 507 } | |
| 508 | |
| 509 | |
| 510 static ngx_int_t | |
| 511 ngx_http_read_discarded_body(ngx_http_request_t *r) | |
| 512 { | |
| 663 | 513 size_t size; |
| 514 ssize_t n; | |
| 633 | 515 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE]; |
| 516 | |
| 517 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 518 "http read discarded body"); | |
| 519 | |
| 520 if (r->headers_in.content_length_n == 0) { | |
| 521 return NGX_OK; | |
| 522 } | |
| 523 | |
| 663 | 524 size = (r->headers_in.content_length_n > NGX_HTTP_DISCARD_BUFFER_SIZE) ? |
| 525 NGX_HTTP_DISCARD_BUFFER_SIZE: | |
| 526 (size_t) r->headers_in.content_length_n; | |
| 633 | 527 |
| 528 n = r->connection->recv(r->connection, buffer, size); | |
| 529 | |
| 530 if (n == NGX_ERROR) { | |
| 531 | |
| 532 r->connection->error = 1; | |
| 533 | |
| 534 /* | |
| 535 * if a client request body is discarded then we already set | |
| 536 * some HTTP response code for client and we can ignore the error | |
| 537 */ | |
| 538 | |
| 539 return NGX_OK; | |
| 540 } | |
| 541 | |
| 542 if (n == NGX_AGAIN) { | |
| 543 return NGX_AGAIN; | |
| 544 } | |
| 545 | |
| 546 r->headers_in.content_length_n -= n; | |
| 547 | |
| 548 return NGX_OK; | |
| 549 } |